Folding frames, handlebars, armrests, and footrests for child carriers

Abstract

This application discloses a child carrier. The child carrier includes a front wheel (30), a rear wheel (40), and a frame (100) having an unfolded state and a folded state. The frame (100) includes a first frame (110), a second frame (120), and a linkage mechanism (130). The first frame (110) connects to the front wheel (30). The second frame (120) connects to the rear wheel (40). The linkage mechanism (130) rotatably connects the first frame (110) and the second frame (120), respectively, so that when the frame (100) switches from the unfolded state to the folded state, the first frame (110) and the second frame (120) move toward each other. Synchronized foldable handlebar, armrest fixed structure to the backrest, foldable or detachable footrest.

Description

[Technical Field]

[0001] The present application relates to the technical field of children's products, in particular to handlebar assemblies, footrest devices, pedal devices, and child carriers. [Background technology]

[0002] In recent years, children's transportation devices such as children's tricycles, balance bikes, pedal tricycles, and bicycles have become popular among consumers. Currently available children's transportation devices (tricycles, balance bikes, bicycles, etc.) are large in overall size, making them inconvenient to carry when used outdoors. While some children's transportation devices are foldable, they have problems such as complicated folding operations.

[0003] Furthermore, many of the handlebars of child carriers currently on the market are not height adjustable, making them inappropriate for children of different sizes. Even if the handlebar height is adjustable, the adjustment process is extremely inconvenient. To ensure the safety of children sitting in child carriers, armrests can be provided on the child carrier seat. However, currently available child carriers require the armrests to be removed before folding the frame, which is extremely inconvenient for users. Furthermore, even if the armrests are designed to fold together when the entire child carrier frame is folded, existing folding mechanisms are very complicated and difficult to implement.

[0004] Furthermore, currently available child transport devices, such as pedal tricycles, are usually equipped with pedals for children to ride on. However, this structure can cause certain inconveniences. For example, young children may have short legs that are unable to place their feet on the pedals. If their feet remain suspended in the air for a long period of time, the child may become easily tired. Even if the child can place their feet on the pedals while seated, the child may become very tired after riding for a long period of time. Summary of the Invention

[0005] According to various embodiments of the present invention, a handlebar assembly, a footrest device, a pedal device, and a child transport device are provided.

[0006] In one embodiment, a child carrier is provided. The child carrier includes a front wheel, a rear wheel, and a frame having an unfolded state and a folded state. The frame includes a first frame, a second frame, and a linkage mechanism. The first frame is connected to the front wheel. The second frame is connected to the rear wheel and includes a first movable connecting portion. The linkage mechanism includes a first connecting frame, a second connecting frame, and a rotating base rotatably connected to the second frame. The first connecting frame is rotatably connected to the first frame via a first rotating shaft. The first connecting frame includes a third rotating shaft. The first movable connecting portion is rotatably connected to the third rotating shaft, and relative rotation between the first movable connecting portion and the first connecting frame causes the second frame to rotate relative to the rotating base. The second connecting frame is connected to the rotating base and rotatably connected to the first frame via the second rotating shaft. When the frame switches from the unfolded state to the folded state, the connecting mechanism rotates relative to the first frame and the second frame, causing the first frame and the second frame to move closer to each other.

[0007] In one embodiment, the first movable connection part has a first through hole, the plane in which the opening of the first through hole is located is angled with respect to a third rotation axis, and the third rotation axis extends through the first through hole, and the third rotation axis rotates to move the first movable connection part along the third rotation axis.

[0008] In one embodiment, the first movable connector includes a universal ball, the universal ball including a second through hole. The third rotation axis extends through the second through hole. A wall of the first through hole forms a ball base configured to receive at least a portion of the universal ball. The ball base can rotate along a surface of the universal ball.

[0009] In one embodiment, the second frame is rotatably connected to the rotation base via a fourth rotation axis, the extension direction of which intersects with but is not perpendicular to the extension direction of the third rotation axis.

[0010] In one embodiment, the second frame includes a first wedge-shaped end face. The rotating base includes a second wedge-shaped end face. When the second frame rotates relative to the rotating base about a fourth rotation axis, the first wedge-shaped end face rotates relative to and contacts the second wedge-shaped end face. The fourth rotation axis is perpendicular to the first wedge-shaped end face and the second wedge-shaped end face.

[0011] In one embodiment, two second frames are provided, and the two second frames are rotatably disposed on either side of the rotation base via two fourth rotation axes, the extension directions of the two fourth rotation axes intersecting the extension direction of the third rotation axis but not perpendicular to the extension direction of the third rotation axis.

[0012] In one embodiment, the linking mechanism further includes a linking rod having a first linking end rotatably connected to the first frame and the second connecting frame via a second rotation axis, and a second linking end connected to the rotation base.

[0013] In one embodiment, the second connecting frame includes a first housing and a second housing, the first housing and the second housing cooperatively enclosing a first receiving cavity, a first coupling end disposed within the first receiving cavity, and a second coupling end extending from the first receiving cavity and connected to the rotating base.

[0014] In one embodiment, the frame further includes a first locking component including a locking pin connected to the first connecting frame and a locking hook pivotally connected to the second connecting frame and including an engaging hook that can engage with the locking pin to limit relative rotation between the first frame and the second frame.

[0015] In one embodiment, the second connecting frame has a first groove, the engagement hook and the first groove cooperate to surround a third accommodation cavity, and the locking pin passes through the third accommodation cavity.

[0016] In one embodiment, the first locking component further includes a first reset member that biases the locking hook to rotate into engagement with the locking pin.

[0017] In one embodiment, the frame further includes an unlocking component configured to drive the locking hook to rotate and disengage from the locking pin, and the unlocking component includes a first pushing rod movably disposed on the first connecting frame, the first pushing rod operable to rotate the locking hook to disengage from the locking pin.

[0018] In one embodiment, the unlocking component further includes a driving handle rotatably connected to the first connecting frame and abutting the first pushing rod, the driving handle including a cam portion, and the driving handle rotates to drive and move the first pushing rod through the cam portion.

[0019] In one embodiment, the first pressing rod includes a pressing rod body and a pushing portion fixed to the pressing rod body, the pressing rod body being movable relative to the first connecting frame and configured to drive the pushing portion to rotate the locking hook.

[0020] In one embodiment, the unlocking component further includes a second reset member disposed between the first connecting frame and the first pressing rod, the second reset member biasing the pressing portion to move in a direction away from the locking hook.

[0021] In one embodiment, the child carrier further includes a handlebar assembly. The handlebar assembly includes a handlebar and a locking mechanism. The locking mechanism has a locked state and an unlocked state. When the locking mechanism is in the locked state, the handlebar is restricted to a predetermined position. When the locking mechanism is in the unlocked state, the handlebar is not restricted to a predetermined position. When the frame is folded, the locking mechanism can be actuated to switch from the locked state to the unlocked state.

[0022] In one embodiment, the child carrier further includes a first pulling member. The handlebar assembly is connected to the first frame. One end of the first pulling member is connected to the locking mechanism, and the other end of the first pulling member is connected to the linkage mechanism. When the frame is switched from the unfolded state to the folded state, the linkage mechanism can actuate the locking mechanism to switch from the locked state to the unlocked state.

[0023] In one embodiment, the child carrier further includes a seat assembly secured to the coupling mechanism and a backrest assembly. The frame further includes a connection base. The backrest assembly is rotatably connected to the connection base. The seat assembly is removably connected to the connection base.

[0024] In one embodiment, the child carrier further includes a backrest assembly removably connected to the linkage mechanism, the linkage mechanism actuating the backrest assembly to fold when the frame is switched from the unfolded state to the folded state.

[0025] In one embodiment, the child carrier further includes a sunshade removably or rotatably connected to the back assembly.

[0026] In one embodiment, the child carrier further includes a pushing assembly and a first connecting mechanism, the pushing assembly being removably connected to the linking mechanism via the first connecting mechanism.

[0027] In one embodiment, the first connection mechanism includes a first locking member movably connected to the pusher assembly. The first locking member has a first locked position and a first unlocked position. When the first locking member is in the first locked position, the first locking member engages with the frame. When the first locking member is in the first unlocked position, the first locking member disengages from the frame and is operable to drive the first locking member to switch between the first locked position and the first unlocked position.

[0028] In one embodiment, the first locking member has a first locking protrusion, the frame has a first locking hole, and when the first locking member is in the first locking position, the first locking protrusion is fitted into the first locking hole.

[0029] In one embodiment, the first connection mechanism further includes a first operating member connected to the first locking member, the first operating member being movably disposed on the pusher assembly, and being actuatable to switch the first locking member between a first locked position and a first unlocked position.

[0030] In one embodiment, the first connection mechanism further includes a first driving member. One end of the first driving member is provided with a first driving groove. The extension direction of the first driving groove intersects with, but is not perpendicular to, the movement direction of the first operating member. The first locking member includes a first driving pin. The first driving pin can be inserted into the first driving groove and can move along the first driving groove. The other end of the first driving member is connected to the first operating member. The first operating member can move in the extension direction of the pusher assembly.

[0031] In one embodiment, the first locking member has a first locking protrusion. The frame has a first locking hole. The pusher assembly has a second receiving cavity extending parallel to the extension direction of the pusher assembly. A first through-hole is formed in a side wall of the second receiving cavity. The first locking member is disposed within the second receiving cavity. When the first locking member is in the first lock position, the first locking protrusion extends through the first through-hole and fits into the first locking hole. A first drive member is inserted into the second receiving cavity, one end of the first drive member is connected to the first locking member, and the other end of the first drive member extends from the second receiving cavity and is connected to the first operating member.

[0032] In one embodiment, the first connection mechanism further includes a third reset member disposed between the pusher assembly and the first locking member, the third reset member biasing the first locking member toward the first locked position.

[0033] In one embodiment, the frame includes a push rod mounting base. The push rod mounting base includes a first mounting groove. A portion of the push hand assembly connected to the first locking member is inserted into the first mounting groove. The first drive member can engage with a groove wall of the first mounting groove.

[0034] In one embodiment, the first locking member has a first locking protrusion, and the first mounting groove has a groove wall with a first locking hole, and when the first locking member is in the first locking position, the first locking protrusion is fitted into the first locking hole.

[0035] In one embodiment, the pusher assembly includes a first connecting rod connected to the frame, a second connecting rod detachably connected to the first connecting rod, and a length adjustment mechanism. The length adjustment mechanism has a locked state and an unlocked state. When the length adjustment mechanism is in the unlocked state, the second connecting rod can move in the extension direction of the first connecting rod to extend or retract the pusher assembly. When the length adjustment mechanism is in the locked state, the second connecting rod and the first connecting rod are fixed to each other.

[0036] In one embodiment, the length adjustment mechanism includes a second locking member having a second locked position and a second unlocked position. The second locking member is operable to be switched between the second locked position and the second unlocked position. The first connecting rod is provided with at least two second locking holes. The second locking member is movably disposed on the second connecting rod. When the second locking member is in the second locked position, the second locking member is engageable with one of the second locking holes, and when the second locking member is in the second unlocked position, the second locking member is disengaged from the second locking holes.

[0037] In one embodiment, the length adjustment mechanism further includes a second operating member movably disposed on the pusher hand assembly and connected to the second locking member, the second operating member being activatable to switch the second locking member between a second locked position and a second unlocked position.

[0038] In one embodiment, the length adjustment mechanism further includes a second drive member. One of the second drive member and the second operating member includes a second drive groove, and the other of the second drive member and the second operating member includes a second drive pin. The extension direction of the second drive groove intersects but is not perpendicular to the movement direction of the second operating member. The second drive pin can be inserted into the second drive groove and can move along the second drive groove. One of the second drive member and the second locking member includes a third drive groove, and the other of the second drive member and the second locking member includes a third drive pin. The extension direction of the third drive groove intersects but is not perpendicular to the movement direction of the second operating member. The third drive pin can be inserted into the third drive groove and can move along the third drive groove. The second drive groove is spaced apart from the third drive groove.

[0039] In one embodiment, the first connecting rod has a hollow end, and the second connecting rod is inserted into the hollow end. The second connecting rod has a third receiving cavity extending parallel to the extension direction of the second connecting rod. The second connecting rod has a second through hole. The second through hole penetrates a side wall of the third receiving cavity. The second locking member is at least partially disposed within the third receiving cavity. When the second locking member is in the second locking position, at least a portion of the second locking member extends through the second through hole and engages with one of the second locking holes.

[0040] In one embodiment, the first connecting rod has a hollow end, and the second connecting rod is inserted into the hollow end. The second connecting rod is provided with a third receiving cavity extending parallel to the extension direction of the second connecting rod. The length adjustment mechanism further includes a guide base. The guide base is disposed within the third receiving cavity. The guide base includes a first receiving groove, a second receiving groove, and an elongated hole passing through the first and second receiving grooves. The extension directions of the first and second receiving grooves intersect with the extension direction of the second receiving groove. The second locking member is movably inserted into the first receiving groove. The drive connection portion of the second drive member is movably inserted into the second receiving groove. The third drive pin extends through the elongated hole to connect the second locking member and the drive connection portion of the second drive member.

[0041] In one embodiment, the length adjustment mechanism further includes a fourth reset member disposed between the second drive member and the pusher assembly, the fourth reset member biasing the second drive member to move in a direction that moves the second locking member to the second locking position.

[0042] In another aspect, a handlebar assembly is provided, the handlebar assembly including at least two handlebars having a plurality of use heights and a first synchronization mechanism disposed between the at least two handlebars, the at least two handlebars being configured to be synchronously switched to different use heights via the first synchronization mechanism.

[0043] In one embodiment, the at least two handlebars include a first handlebar and a second handlebar. The first handlebar includes a first connecting portion and a first holding portion. The second handlebar includes a second connecting portion and a second holding portion. The first connecting portion and the second connecting portion are rotatably connected to each other. The first synchronizing mechanism is disposed between the first connecting portion and the second connecting portion. The first synchronizing mechanism causes the first connecting portion and the second connecting portion to rotate synchronously in opposite directions to each other, thereby synchronously adjusting the use heights of the first holding portion and the second holding portion.

[0044] In one embodiment, the first synchronization mechanism includes a first driving element and a second driving element drivingly connected to the first driving element, the first driving element being drivingly connected to the first handlebar, and the second driving element being drivingly connected to the second handlebar.

[0045] In one embodiment, the first handlebar is an L-shaped rod or an arc-shaped rod, and the first connecting portion and the first holding portion are respectively disposed on both ends of the first handlebar, and the second handlebar is an L-shaped rod or an arc-shaped rod, and the second connecting portion and the second holding portion are respectively disposed on both ends of the second handlebar.

[0046] In one embodiment, the at least two handlebars each include a first handlebar including a first fitting ring and a second handlebar including a second fitting ring. The first fitting ring includes a first inner gear portion circumferentially. The second fitting ring includes a second inner gear portion circumferentially. The first synchronizing mechanism includes a first external gear and a second external gear. The first external gear meshes with the first inner gear portion, and the second external gear meshes with the second inner gear portion.

[0047] In one embodiment, the first mating ring and the second mating ring overlap to form a receiving cavity, and the first external gear and the second external gear are both disposed within the receiving cavity.

[0048] In one embodiment, the handlebar assembly further includes a support base connected to the frame. The support base includes a mounting member having a first pivot shaft and a second pivot shaft spaced apart from each other. The first external gear and the second external gear are rotatably connected to the first pivot shaft and the second pivot shaft, respectively. Additionally, the first mating ring and the second mating ring are rotatable relative to the mounting member.

[0049] In one embodiment, the first handlebar is an L-shaped rod or an arc-shaped rod. The first handlebar further includes a first retaining portion, the first mating ring and the first retaining portion being disposed on opposite ends of the first handlebar. The second handlebar is an L-shaped rod or an arc-shaped rod. The second handlebar further includes a second retaining portion, the second mating ring and the second retaining portion being disposed on opposite ends of the second handlebar.

[0050] In one embodiment, the handlebar assembly further includes a locking mechanism having a locked state and an unlocked state, wherein when the locking mechanism is in the locked state, the at least two handlebars are locked at one of the use heights, and when the locking mechanism is in the unlocked state, the at least two handlebars can be switched to another one of the use heights.

[0051] In one embodiment, the at least two handlebars include a first handlebar and a second handlebar. The locking mechanism includes a pushing button. The pushing button is movable between a first position and a second position. One of the first handlebar and the pushing button includes a first locking groove, and the other of the first handlebar and the pushing button includes a first locking portion. One of the second handlebar and the pushing button includes a second locking groove, and the other of the second handlebar and the pushing button includes a second locking portion. When the pushing button is in the first position, the first locking portion and the second locking portion are engaged with the first locking groove and the second locking groove, respectively. When the pushing button is in the second position, the first locking portion and the second locking portion are disengaged from the first locking groove and the second locking groove, respectively.

[0052] In one embodiment, a third locking groove is further provided on one of the second handlebar and the press button, and a third locking portion is further provided on the other of the second handlebar and the press button. When the press button is in the first position, the third locking portion is engaged with the third locking groove. When the press button is in the second position, the third locking portion is disengaged from the third locking groove.

[0053] In one embodiment, the push button includes an unlocking member operable to move the push button to the second position.

[0054] In one embodiment, the locking mechanism further includes a push button reset member that biases the push button toward the first position.

[0055] In one embodiment, the first handlebar includes a first mating ring. The first mating ring is provided with a first internal gear portion in a circumferential direction. The second handlebar includes a second mating ring. The second mating ring is provided with a second internal gear portion in a circumferential direction. The first synchronizing mechanism includes a first external gear and a second external gear. The first external gear meshes with the first internal gear portion. The second external gear meshes with the second internal gear portion. The first locking groove is disposed in the first mating ring, the second locking groove is disposed in the second mating ring, and the first locking portion and the second locking portion are disposed on the push button.

[0056] In one embodiment, a third locking groove is further provided on one of the second handlebar and the press button, and a third locking portion is further provided on the other of the second handlebar and the press button. When the press button is in the first position, the third locking portion engages with the third locking groove, and when the press button is in the second position, the third locking portion disengages from the third locking groove. The third locking groove is provided on the first fitting ring and is positioned to face the first locking groove, and the third locking portion is provided on the press button.

[0057] In one embodiment, the push button includes a second push rod and a locking rod. An angle is formed between the second push rod and the locking rod. The locking rod is an L-shaped bar and includes a first rod and a second rod arranged at an angle to each other. One end of the first rod remote from the second rod is connected to the second push rod. The second push rod has an engaging end. The first handlebar includes a first mating ring, and the second handlebar includes a second mating ring. When the push button is in the first position, the first mating ring and the second mating ring are located between the second rod and the engaging end. The second rod forms a first locking portion, and the engaging end forms a second locking portion.

[0058] In one embodiment, the handlebar assembly includes a support base connected to the frame, at least a portion of the first handlebar and at least a portion of the second handlebar are disposed within the support base and are rotatable relative to the support base, and the push button is movably disposed within the support base.

[0059] In one embodiment, the support base is provided with a first operating hole, and the push button is provided with an unlocking operating member, at least a portion of which is operable to protrude from a surface of the support base through the first operating hole.

[0060] In another aspect, a child transport device is provided, the child transport device including a frame and a handlebar assembly according to any of the above-described embodiments, the handlebar assembly being attached to the frame.

[0061] In another aspect, a child carrier is provided. The child carrier includes a backrest assembly, an armrest assembly connected to the backrest assembly and having an unfolded state and a folded state, and a first positioning mechanism disposed between the backrest assembly and the armrest assembly. When the armrest assembly is in the unfolded state, the first positioning mechanism allows the armrest assembly to be fixed in a first position relative to the backrest assembly. When the armrest assembly is in the folded state, the first positioning mechanism allows the armrest assembly to be fixed in a second position relative to the backrest assembly.

[0062] In one embodiment, the first positioning mechanism includes a first positioning portion and a second positioning portion disposed on one of the backrest assembly and the armrest assembly, and a third positioning portion disposed on the other of the backrest assembly and the armrest assembly, wherein the third positioning portion is locked with the first positioning portion to fix the armrest assembly in a first position relative to the backrest assembly when the armrest assembly is in the unfolded state, and the third positioning portion is locked with the second positioning portion to fix the armrest assembly in a second position relative to the backrest assembly when the assembly is in the folded state.

[0063] In one embodiment, the armrest assembly can switch the third positioning portion from a locked state with the first positioning portion to a locked state with the second positioning portion, or alternatively, the armrest assembly can switch the third positioning portion from a locked state with the second positioning portion to a locked state with the first positioning portion.

[0064] In one embodiment, the first positioning mechanism includes a first positioning recess and a second positioning recess spaced apart on the backrest assembly, and a first positioning protrusion movably disposed on the armrest assembly, wherein when the armrest assembly is in the unfolded state, the first positioning protrusion is inserted into the first positioning recess to fix the armrest assembly in a first position relative to the backrest assembly, and when the assembly is in the folded state, the first positioning protrusion is inserted into the second positioning recess to fix the armrest assembly in a second position relative to the backrest assembly.

[0065] In one embodiment, the first positioning protrusion is a ball, and the first and second positioning recesses are partially spherical holes that can mate with the ball.

[0066] In one embodiment, the first positioning protrusion has a lock position. When the first positioning protrusion is in the lock position, the first positioning protrusion is inserted into the first positioning recess or the second positioning recess. The first positioning mechanism further includes a fifth reset member disposed between the first positioning protrusion and the armrest assembly. The fifth reset member biases the first positioning protrusion toward the lock position.

[0067] In one embodiment, the backrest assembly includes a mounting base and a fixed base rotatably connected to the mounting base. The armrest assembly is fixedly connected to the fixed base. The first positioning mechanism includes a first positioning recess, a second positioning recess, and a first positioning protrusion. The first positioning recess and the second positioning recess are spaced apart on the mounting base. The first positioning protrusion is movably disposed on the mounting base. When the armrest assembly is in the unfolded state, the first positioning protrusion is inserted into the first positioning recess to fix the armrest assembly in a first position relative to the backrest assembly, and when the armrest assembly is in the folded state, the first positioning protrusion is inserted into the second positioning recess to fix the armrest assembly in a second position relative to the backrest assembly.

[0068] In one embodiment, the fixed base has an accommodating groove extending in a direction parallel to the rotation axis of the fixed base and the mounting base, and the first positioning protrusion is movably disposed in the accommodating groove.

[0069] In one embodiment, the fixed base includes a receiving groove, and the first positioning mechanism further includes a fifth reset member disposed in the receiving groove, with both ends of the fifth reset member abutting the first positioning protrusion and the bottom of the receiving groove, respectively.

[0070] In one embodiment, the backrest assembly further includes a connection base rotatably connected to the backrest assembly, and the fixed base rotatably connected to the mounting base. The connection base includes a third housing and a fourth housing fixedly connected to each other. The mounting base is rotatably connected to the fourth housing. The mounting base, the third housing, and the fourth housing enclose a fourth accommodating cavity, and the first positioning recess and the second positioning recess are both located on a side of the mounting base facing the fourth housing. The fourth housing has a mounting opening therethrough. The fixed base has a mounting boss. The mounting boss has a mounting groove. The first positioning protrusion is movably disposed within the mounting groove and is movable to be partially outside the mounting groove. The mounting boss extends through the mounting opening into the fourth accommodating cavity.

[0071] In one embodiment, when the armrest assembly is in a state intermediate between the unfolded state and the folded state, the first positioning mechanism enables the armrest assembly to be fixed in a third position relative to the backrest assembly.

[0072] In one embodiment, the backrest assembly includes a backrest body and a fixed base rotatably connected to the backrest body, the fixed base being connected to an armrest assembly, the armrest body of the armrest assembly being removably connected to the fixed base.

[0073] In one embodiment, the fixed base is provided with an engagement portion, and the armrest body is provided with a positioning groove configured to engage with the engagement portion.

[0074] In one embodiment, the child carrier further includes a first locking mechanism including a third locking member and a third locking hole, the third locking member being movably disposed on one of the armrest body and the fixed base, the third locking hole being disposed on the other of the armrest body and the fixed base, and the third locking member being capable of being locked to the third locking hole.

[0075] In one embodiment, the child carrier further includes a first locking mechanism. The first locking mechanism includes a third locking member and a third locking hole disposed in the fixed base. The third locking member is pivotally connected to the armrest body at a first pivot point. The third locking member includes a first operating end and a first locking end. The first pivot point is disposed between the first operating end and the first locking end. The first locking end is insertable into the third locking hole, and the first operating end is operable to separate the first locking end from the third locking hole.

[0076] In one embodiment, the first locking mechanism further includes a sixth reset member disposed between the first operating end and the armrest body, the sixth reset member biasing the first locking end to rotate in a direction that inserts the first locking end into the third locking hole.

[0077] In one embodiment, the armrest assembly includes an armrest body, a first armrest rod, and a second armrest rod. The first armrest rod and the second armrest rod are connected to opposite ends of the armrest body and opposite ends of the backrest assembly. The first positioning mechanism is disposed between the first armrest rod and the backrest assembly and between the second armrest rod and the backrest assembly.

[0078] In one embodiment, the child carrier includes a frame and an adjustment mechanism disposed between the frame and a back assembly, the back assembly being connected to the frame, the adjustment mechanism selectively restricting or allowing relative rotation between the back assembly and the frame.

[0079] In one embodiment, the adjustment mechanism includes a second locking component having a locked state in which relative rotation between the backrest assembly and the frame is restricted and an unlocked state in which relative rotation between the backrest assembly and the frame is not restricted, and an operating component connected to the second locking component and operable to switch the second locking component between the locked state and the unlocked state.

[0080] In one embodiment, the backrest assembly further includes a mounting base fixedly connected to the frame, and the second locking component includes a limiting hole provided in the mounting base and a limiting pin movably disposed on the backrest assembly, the limiting pin being insertable into the limiting hole.

[0081] In one embodiment, at least two limiting holes are provided, and limiting pins can be inserted into different limiting holes to secure the back assembly at different relative angles to the frame.

[0082] In one embodiment, the operating component includes an unlocking member and a second tensioning member, both ends of which are connected to the unlocking member and the second locking component, respectively, and the unlocking member is operable to drive the second locking component via the second tensioning member to switch from a locked state to an unlocked state.

[0083] In one embodiment, the operating component further includes a seventh reset member that biases the second tension member in a direction that drives the second locking component to switch to the locked state.

[0084] In one embodiment, the child carrier further includes a frame. The backrest assembly is removably connected to the frame. The backrest assembly further includes a connection base. The backrest assembly is removably connected to the frame via the connection base.

[0085] In one embodiment, the child carrier further includes a second locking mechanism including a first locking element disposed on the connecting base and a second locking element disposed on the frame, the first locking element being lockable with or unlockable from the second locking element.

[0086] In one embodiment, the child carrier further includes a second locking mechanism including a fourth locking member movably disposed on the connecting base and a fourth locking hole disposed on the frame, the fourth locking member being lockable with or unlockable from the fourth locking hole.

[0087] In one embodiment, the fourth locking member is pivotally connected to the connection base at a second pivot point. The fourth locking member includes a second operating end and a second locking end. The second pivot point is disposed between the second operating end and the second locking end. The second locking end is insertable into the fourth locking hole. The second operating end is operable to separate the second locking end from the fourth locking hole.

[0088] In one embodiment, the connection base includes a third housing and a fourth housing. The third housing and the fourth housing cooperate to enclose a fifth receiving cavity. The fourth locking member is disposed within the fifth receiving cavity. The third housing has a through hole. The second locking end is insertable through the through hole into the fourth locking hole. The fourth housing has a second operating hole. The second operating end at least partially protrudes from an outer surface of the fourth housing through the second operating hole.

[0089] In one embodiment, the second locking mechanism further includes an eighth reset member disposed between the second operating end and the connection base, the eighth reset member biasing the second operating end to move in a direction that drives the second locking end to lock into the fourth locking hole.

[0090] In one embodiment, one of the frame and the backrest assembly includes a guide boss, and the other of the frame and the backrest assembly includes a guide groove, the guide boss being insertable into the guide groove.

[0091] In one embodiment, an insertion opening is provided in the side wall of the guide groove, and the guide boss can be inserted into the guide groove through the insertion opening. A guide hole is provided in the guide boss, and a guide rib is provided on the bottom surface of the guide groove. When the guide boss is inserted into the guide groove, the guide rib is inserted into the guide hole.

[0092] In yet another aspect, a footrest device is provided. The footrest device includes a support member configured to be connected to a frame, the support member being switchable between a first rotational position and a second rotational position, and when the support member is switched from the first rotational position to the second rotational position, the support member is folded toward the frame. The footrest device also includes a footrest component configured to be pivotally or detachably connected to the support member. When the footrest component is pivotally connected to the support member, the footrest component is switchable between an unfolded state and a folded state. When the footrest component is in the unfolded state, the footrest component is configured to support a child's feet, and when the footrest component is in the folded state, the footrest component is folded toward the support member. The footrest device has an in-use state and an out-of-use state. When the footrest device is in the in-use state, the support member is in the first rotational position, and the footrest component is in the unfolded state or attached to the support member. When the footrest device is not in use, the support member is in the second rotational position and the footrest components are folded or detached from the support member.

[0093] In one embodiment, the footrest component can be connected to a pedal base of the child transport device and function as a pedal component for a child to drive and move the child transport device.

[0094] In one embodiment, the footrest component includes a footrest body that supports a child's feet and a first pin shaft connected to the footrest body, with one end of the first pin shaft having a fourth lock groove circumferentially disposed thereon. The footrest device further includes a second connection mechanism. The second connection mechanism includes a fifth locking member movably disposed on the support member and switchable between a first locked position and a first unlocked position. The fifth locking member has a fifth locking hole, the fifth locking hole having a radial size larger than the radial size of the first pin shaft. The second connection mechanism also includes a lock reset member disposed between the fifth locking member and the support member and biasing the fifth locking member to move to the first locked position. The end of the first pin shaft, with the fourth locking groove, is configured to be inserted into the support member and extend through the fifth locking hole. When the fifth locking member is in the first locked position, the hole wall of the fifth locking hole is inserted into the fourth locking groove.

[0095] In one embodiment, at least a portion of the fifth locking member protrudes from the support member, and the portion of the fifth locking member protruding from the support member is movable from the first locked position to the first unlocked position. Alternatively, when an end of a first pin shaft provided with the fourth locking groove is inserted into the support member, the first pin shaft is drivable to move the fifth locking member from the first locked position to the first unlocked position.

[0096] In one embodiment, the first pin shaft is partially inserted into the footrest component, and the end of the first pin shaft provided with the fourth locking groove protrudes from the footrest component, and the extension direction of the first pin shaft intersects with the movement direction of the fifth locking member.

[0097] In one embodiment, the footrest device further includes a connecting member fixedly connected to the frame, and the support member is pivotally connected to the connecting member.

[0098] In one embodiment, the footrest device further includes a second positioning mechanism. The second positioning mechanism includes a fourth positioning portion, a fifth positioning portion, and a sixth positioning portion. The fourth positioning portion and the fifth positioning portion are disposed on one of the support member and the connecting member, and the sixth positioning portion is disposed on the other of the support member and the connecting member. When the support member is in the first rotation position, the sixth positioning portion and the fourth positioning portion are locked to each other, and when the support member is in the second rotation position, the sixth positioning portion and the fifth positioning portion are locked to each other.

[0099] In one embodiment, the footrest device further includes a second positioning mechanism. The second positioning mechanism includes a third positioning recess, a fourth positioning recess, and a second positioning protrusion. The third positioning recess and the fourth positioning recess are disposed on one of the support member and the connecting member, and the second positioning protrusion is movably disposed on the other of the support member and the connecting member. The second positioning protrusion has a first movement position and a second movement position. When the second positioning protrusion is in the first movement position, the second positioning protrusion is engaged with the third positioning recess or the fourth positioning recess, and when the second positioning protrusion is in the second movement position, the second positioning protrusion is disengaged from the third positioning recess or the fourth positioning recess.

[0100] In one embodiment, the third positioning recess and the fourth positioning recess are the first positioning groove and the second positioning groove, respectively, and the second positioning protrusion is a ball.

[0101] In one embodiment, the second positioning mechanism further includes a positioning reset member disposed between the second positioning protrusion and the support member, the positioning reset member biasing the second positioning protrusion toward the first movement position.

[0102] In one embodiment, the support member includes a support body configured to be connected to the footrest component and a first pivot portion protruding from the support body and including a first side surface, the first side surface being provided with a third positioning recess and a fourth positioning recess. The connecting member includes a second pivot portion pivotally connected to the first pivot portion via a rotation axis. The second pivot portion includes a second side surface opposite the first side surface. The second side surface is provided with a second mounting groove. The second positioning protrusion is movably disposed within the second mounting groove. When the second positioning protrusion is in the first movement position, at least a portion of the second positioning protrusion protrudes from the second mounting groove to engage with the third positioning recess or the fourth positioning recess, and when the second positioning protrusion is in the second movement position, the second positioning protrusion retracts into the second mounting groove to disengage from the third positioning recess or the fourth positioning recess.

[0103] In one embodiment, the third positioning recess and the fourth positioning recess are arranged around the rotation shaft, and the extension direction of the second mounting groove is substantially parallel to the longitudinal direction of the rotation shaft.

[0104] In one embodiment, the support member includes two first pivot portions arranged opposite each other. The two first pivot portions are pivotally connected to two side surfaces of the second pivot portion via two rotation axes. The second mounting grooves are arranged on two second side surfaces of the second pivot portion that face the two first pivot portions, respectively. Two second positioning mechanisms are provided, and each of the two second positioning mechanisms is arranged between a second pivot portion and one of the two corresponding first pivot portions.

[0105] In one embodiment, the footrest device further includes a second positioning mechanism. The second positioning mechanism includes a fourth positioning portion, a fifth positioning portion, and a sixth positioning portion. The fourth positioning portion and the fifth positioning portion are disposed on one of the support member and the connecting member, and the sixth positioning portion is disposed on the other of the support member and the connecting member. The fourth positioning portion and the fifth positioning portion are configured to be magnetically locked with the sixth positioning portion.

[0106] In one embodiment, the footrest device further includes a second synchronization mechanism including a third drive member and a fourth drive member drivingly connected to the third drive member. The footrest components include a first footrest connected to the third drive member and a second footrest connected to the fourth drive member. The first footrest and the second footrest are pivotally connected to opposite sides of the support member.

[0107] In one embodiment, the third drive member includes a first gear toothing portion and the fourth drive member includes a second gear toothing portion, and the first gear toothing portion and the second gear toothing portion can mesh with each other.

[0108] In one embodiment, the footrest device further includes a third pivot shaft rotatably connected to the support member and a fourth pivot shaft rotatably connected to the support member, the third drive member and the first footrest are fixedly connected to the third pivot shaft, and the fourth drive member and the second footrest are fixedly connected to the third pivot shaft.

[0109] In one embodiment, the footrest component is pivotally connected to the support member. The footrest device further includes a fixing component. The fixing component includes a first magnetic member disposed on the footrest component and a second magnetic member disposed on the support member. When the footrest component is in the folded state, the first magnetic member and the second magnetic member attract each other.

[0110] In one embodiment, the footrest device further includes a fixed component, the fixed component including a permanent magnet disposed on the footrest component and a rotation shaft, the support member being pivotally connected to the frame via the rotation shaft, the rotation shaft being made of a ferromagnetic material, and the permanent magnet attracts the rotation shaft when the footrest component is in the folded state. The footrest component is pivotally connected to the support member.

[0111] In one embodiment, the footrest component and the support member are pivotally connected to one another via a third pivot shaft, and the support member and the connecting member are pivotally connected to one another via a rotation axis that is spaced apart from and not parallel to the third pivot shaft.

[0112] In yet another aspect, a child transport device is provided, the child transport device including a frame and a footrest device according to any of the above embodiments.

[0113] In one embodiment, the child transport device further includes a pedal device including a pedal component, a pedal base connected to the wheel assembly, and a third connection mechanism, wherein the pedal component is removably connected to the pedal base via the third connection mechanism.

[0114] In one embodiment, the pedal component is a footrest component.

[0115] In one embodiment, the pedal component includes a fifth locking groove, and the third connecting mechanism includes a sixth locking member movably disposed on the pedal base. The sixth locking member has a first operating position and a second operating position. When the sixth locking member is in the first operating position, the sixth locking member is inserted into the fifth locking groove to fixedly connect the pedal component to the pedal base. When the sixth locking member is in the second operating position, the sixth locking member is disengaged from the fifth locking groove to allow the pedal component to be separated from the pedal base.

[0116] In one embodiment, the pedal component includes a pedal body and a second pin shaft connected to each other. The second pin shaft is provided with a fifth locking groove, and the third connection mechanism includes a sixth locking member movably disposed on the pedal base. The sixth locking member is provided with a sixth locking hole. The sixth locking hole has a radial size larger than the radial size of the second pin shaft. The second pin shaft extends through the sixth locking hole. The fifth locking groove is located in a position corresponding to the sixth locking hole. The sixth locking member has a first operating position and a second operating position. When the sixth locking member is in the first operating position, a portion of the hole wall of the sixth locking hole is inserted into the fifth locking groove. When the sixth locking member is in the second operating position, a portion of the hole wall of the sixth locking hole is separated from the fifth locking groove.

[0117] In one embodiment, the third connection mechanism further includes a third operating member fixedly connected to the sixth locking member, the third operating member operative to enable the sixth locking member to move from the first operating position to the second operating position, and the third connection mechanism also includes an operating reset member disposed between the third operating member and the pedal base, the operating reset member biasing the third operating member to drive the sixth locking member to move to the first operating position.

[0118] In one embodiment, the child transport device further includes a wheel assembly rotatably connected to the frame. The pedal base includes a fifth housing connected to the wheel assembly, the fifth housing having a fourth receiving groove and a receiving boss, the receiving boss having a fourth receiving cavity extending therethrough, an insertion hole in a first groove wall of the fourth receiving groove, the fourth receiving cavity communicating with the fourth receiving groove through the insertion hole, and the pedal base also includes a sixth housing having a third operating hole and the fourth receiving groove spaced therefrom. The fifth and sixth housings are connected to each other to form a mounting cavity. The fourth receiving groove and the receiving boss are disposed within the mounting cavity. The receiving boss extends through the mounting hole and protrudes from the outer surface of the sixth housing. At least a portion of the second pin shaft is inserted into the fourth receiving cavity. A sixth locking member and at least a portion of the third operating member are movably disposed within the mounting cavity, with at least a portion of the sixth locking member being inserted into the fourth receiving cavity through the insertion hole and being inserted into and separated from the fifth locking groove of the second pin shaft, and at least a portion of the third operating member protruding outward from the mounting cavity through the third operating hole.

[0119] In one embodiment, both ends of the operation reset member abut against the second groove walls of the third operation member and the fourth receiving groove, respectively, and the second groove walls are disposed opposite to the first groove walls.

[0120] In one embodiment, the first groove wall forms a fourth limiting portion, the third operating member includes a fifth limiting portion, and when the sixth locking member is in the first operating position, the fourth limiting portion abuts the fifth limiting portion.

[0121] In yet another aspect, a footrest device is provided. The footrest device includes a footrest body configured to be connected to a frame. The footrest body has an unfolded state and a folded state. When the footrest body is in the unfolded state, the footrest body is configured to support a child's feet.

[0122] In one embodiment, the footrest device further includes a support member configured to be connected to the frame. The footrest body includes at least a first footrest and a second footrest. The first footrest and the second footrest are rotatably connected to opposite sides of the support member. The first footrest and the second footrest each have an unfolded state and a folded state relative to the support member. When the first footrest or the second footrest is in the unfolded state, the first footrest or the second footrest is configured to support a child's feet. When the first footrest or the second footrest is in the folded state, the first footrest or the second footrest is folded toward the support member.

[0123] In one embodiment, the footrest device further includes a second synchronization mechanism disposed between the first footrest and the second footrest, the second synchronization mechanism enabling synchronous rotation of the first footrest and the second footrest.

[0124] In one embodiment, the footrest device further includes a second synchronization mechanism. The second synchronization mechanism includes a third drive member and a fourth drive member. The third drive member is connected to the first footrest. The fourth drive member is connected to the second footrest. The third drive member is drivingly connected to the fourth drive member.

[0125] In one embodiment, the footrest device further includes a second synchronization mechanism. The second synchronization mechanism includes a third drive member and a fourth drive member that synchronously rotate the first footrest and the second footrest in opposite directions, respectively. The third drive member includes a first gear toothing portion, and the fourth drive member includes a second gear toothing portion. The first gear toothing portion and the second gear toothing portion mesh with each other.

[0126] In one embodiment, the footrest device further includes a second synchronization mechanism, a third pivot shaft, and a fourth pivot shaft. The second synchronization mechanism includes a third drive member and a fourth drive member. The third drive member and the first footrest are rotatably connected to the support member via the third pivot shaft. The fourth drive member and the second footrest are rotatably connected to the support member via the fourth pivot shaft.

[0127] In one embodiment, the footrest device further includes a fixing member disposed between the footrest body and the support member, and when the footrest body is in the folded state, the footrest body can be fixed to one side of the support member via the fixing member.

[0128] In one embodiment, the fixed component includes a first magnetic member disposed on the footrest body and a second magnetic member disposed on the support member, and when the footrest body is in the folded state, the first magnetic member and the second magnetic member attract each other.

[0129] In one embodiment, the fixed component includes a permanent magnet disposed on the footrest body and a rotating shaft disposed on the support member. The support member is rotatably connected to the frame via the rotating shaft. The rotating shaft is made of a ferromagnetic material. When the footrest body is in the folded state, the permanent magnet is attracted to the rotating shaft.

[0130] In one embodiment, the pedal device further includes a support member configured to be connected to the frame, the footrest body being rotatably connected to the support member, and the pedal device also including a connecting member configured to be connected to the frame. The support member is rotatably connected to the connecting member. The support member has a first rotational position and a second rotational position relative to the connecting member. When the support portion is in the first rotational position and the footrest body is in the unfolded state, the footrest body is configured to support a child's feet. When the support portion is in the second rotational position, the support portion is folded toward the frame.

[0131] In one embodiment, the footrest body and the support member are pivotally connected to each other via a third pivot shaft, and the support member and the connecting member are pivotally connected to each other via a rotation axis that is spaced apart from and not parallel to the third pivot shaft.

[0132] In one embodiment, the axis of rotation is perpendicular to the third pivot shaft.

[0133] In one embodiment, the footrest device further includes a second positioning mechanism disposed between the support member and the connecting member, the second positioning mechanism configured to fix the support member in a first rotational position or a second rotational position relative to the connecting member.

[0134] In one embodiment, the footrest device further includes a second positioning mechanism. The second positioning mechanism includes a fourth positioning portion, a fifth positioning portion, and a sixth positioning portion. The fourth positioning portion and the fifth positioning portion are disposed on one of the support member and the connecting member, and the sixth positioning portion is disposed on the other of the support member and the connecting member. The fourth positioning portion and the fifth positioning portion are configured to be magnetically locked with the sixth positioning portion.

[0135] In one embodiment, the footrest device further includes a support member configured to be connected to the frame, the footrest device being rotatably connected to the support member. The support member has a first rotational position and a second rotational position. When the support member is in the first rotational position and the footrest body is in the unfolded state, the footrest body is configured to support a child's feet. When the support member is in the second rotational position, the support member is folded toward the frame.

[0136] In another aspect, a child transport device is provided, the child transport device including a frame and a pedal device according to any of the above embodiments.

[0137] The details of embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims. [Brief explanation of the drawings]

[0138] These and other objects and features of the present invention will become more apparent and will be more readily understood in the following detailed description of the preferred embodiments taken in conjunction with the following drawings, in which like reference numerals refer to like parts throughout the various views unless otherwise specified.

[0139] [Figure 1] FIG. 1 is a schematic perspective view of a child carrier according to one embodiment of the present application, with the frame in an unfolded state. [Figure 2] FIG. 2 is a schematic perspective view of the child carrier shown in FIG. 1 in a semi-folded state. [Figure 3] FIG. 3 is a schematic perspective view of the child carrier shown in FIG. 1 in a folded state. [Figure 4] FIG. 4 is an exploded view of the child carrier shown in FIG. [Figure 5] FIG. 5 is a cross-sectional view of the child carrier shown in FIG. [Figure 6] FIG. 6 is an enlarged view of part A in FIG. [Figure 7] FIG. 7 is a cross-sectional view of the child carrier shown in FIG. [Figure 8] FIG. 8 is an enlarged view of part B in FIG. [Figure 9] FIG. 9 is a schematic perspective view of the locking hook and coupling mechanism of the child carrier shown in FIG. 1, with the first connecting frame omitted. [Figure 10] FIG. 10 is an exploded view of the locking hook and coupling mechanism of the child carrier shown in FIG. 9, with the first connecting frame omitted. [Figure 11] FIG. 11 is a schematic perspective view of the child carrier shown in FIG. 1 from another perspective, with the frame in an unfolded position. [Figure 12] FIG. 12 is a schematic perspective view of the child carrier shown in FIG. 11 in a semi-folded position. [Figure 13] FIG. 13 is a cross-sectional view of the child carrier shown in FIG. 1 taken along line AA. [Figure 14] FIG. 14 is an enlarged view of part C in FIG. [Figure 15] FIG. 15 is a cross-sectional view of the child carrier shown in FIG. 3 taken along line BB. [Figure 16] FIG. 16 is an enlarged view of part D in FIG. [Figure 17] FIG. 17 is a schematic perspective view of the child carrier shown in FIG. 3, seen from another angle. [Figure 18] FIG. 18 is a schematic perspective view of the second frame and rear wheels of the child carrier shown in FIG. [Figure 19] FIG. 19 is an exploded view of the second frame shown in FIG. [Figure 20] FIG. 20 is a half cross-sectional view of the child carrier shown in FIG. [Figure 21] FIG. 21 is an enlarged view of part E in FIG. [Figure 22] FIG. 22 is a schematic perspective view of the handlebar assembly of the child carrier shown in FIG. 1, the handlebar assembly being in an unfolded position. [Figure 23] FIG. 23 is a schematic perspective view of the handlebar assembly shown in FIG. 22 in a folded position. [Figure 24] FIG. 24 is an exploded view of the handlebar assembly shown in FIG. [Figure 25] FIG. 25 is a schematic perspective view of a child carrier according to another embodiment of the present application, with the handlebar assembly in an unfolded position. [Figure 26] 26 is a schematic perspective view of the handlebar assembly of the child carrier shown in FIG. 25. FIG. [Figure 27] 27 is a schematic perspective view of the handlebar assembly shown in FIG. 26 as seen from another angle. [Figure 28]FIG. 28 is an exploded view of the handlebar assembly shown in FIG. [Figure 29] 29 is a schematic perspective view of a first handlebar of the handlebar assembly shown in FIG. 28. FIG. [Figure 30] 30 is a schematic perspective view of a second handlebar of the handlebar assembly shown in FIG. 28. FIG. [Figure 31] 31 is a front view of the handlebar assembly of the child carrier shown in FIG. 25. FIG. [Figure 32] FIG. 32 is a schematic perspective view of the child carrier shown in FIG. 25 after the use height of the handlebar assembly has been adjusted. [Figure 33] 33 is a front view of the handlebar assembly of the child carrier shown in FIG. 32. FIG. [Figure 34] FIG. 34 is a schematic perspective view of the child carrier shown in FIG. 25 in a folded position. [Figure 35] FIG. 35 is a front view of the handlebar assembly of the child carrier shown in FIG. [Figure 36] FIG. 36 is a partial enlarged view of the handlebar assembly shown in FIG. 26, with the fourth cover omitted. [Figure 37] FIG. 37 is a partially enlarged view of the handlebar assembly shown in FIG. 26 from another perspective, with the fourth cover omitted. [Figure 38] FIG. 38 is a partial enlarged view of the handlebar assembly shown in FIG. 26, with the fourth cover, mounting member, and push button omitted. [Figure 39] FIG. 39 is a partially enlarged view of the handlebar assembly shown in FIG. 26 from another perspective, with the fourth cover, the mounting member, and the push button omitted. [Figure 40] FIG. 40 is a cross-sectional view of the handlebar assembly shown in FIG. 26, with the fourth cover, mounting member, and push button omitted. [Figure 41]FIG. 41 is a schematic perspective view of the handlebar assembly shown in FIG. 26, with the first housing and part of the support body omitted. [Figure 42] FIG. 42 is an enlarged view of part F in FIG. [Figure 43] 43 is a schematic perspective view of the push button of the handlebar assembly shown in FIG. 28. FIG. [Figure 44] FIG. 44 is a partial enlarged view of the handlebar assembly shown in FIG. 26 with the support base and linkage assembly omitted and the first locking component in a locked state. [Figure 45] 45 is a partially enlarged view of the handlebar assembly shown in FIG. 44 from another perspective. [Figure 46] FIG. 46 is a cross-sectional view of the handlebar assembly shown in FIG. 26 with the locking mechanism in a locked position. [Figure 47] FIG. 47 is a cross-sectional view of the handlebar assembly shown in FIG. 26 with the locking mechanism in an unlocked position. [Figure 48] FIG. 48 is a schematic perspective view of a child carrier according to yet another embodiment of the present application, with the frame in an unfolded state. [Figure 49] FIG. 49 is a schematic perspective view of the child carrier shown in FIG. 48 in a semi-folded position. [Figure 50] FIG. 50 is a schematic perspective view of the child carrier shown in FIG. 48 in a folded position. [Figure 51] FIG. 51 is a schematic perspective view of a child carrier according to yet another embodiment of the present application, with the frame in a folded state. [Figure 52] FIG. 52 is another schematic perspective view of the child carrier shown in FIG. 48, with the child carrier in an unfolded position. [Figure 53] FIG. 53 is a schematic perspective view of the child carrier shown in FIG. 52 from another perspective, with the pusher assembly omitted. [Figure 54] FIG. 54 is an exploded view of the child carrier shown in FIG. [Figure 55]FIG. 55 is another exploded view of the child carrier shown in FIG. [Figure 56] FIG. 56 is an enlarged view of part G in FIG. [Figure 57] FIG. 57 is an enlarged view of part H in FIG. [Figure 58] FIG. 58 is a side view of the child carrier shown in FIG. [Figure 59] FIG. 59 is a schematic perspective view of the child carrier shown in FIG. 58 in a semi-folded position. [Figure 60] FIG. 60 is a schematic perspective view of the child carrier shown in FIG. 58 in a folded position. [Figure 61] FIG. 61 is an exploded view of the back assembly, armrest assembly, and sunshade of the child carrier shown in FIG. [Figure 62] 62 is a cross-sectional view of the armrest assembly shown in FIG. 61. FIG. [Figure 63] FIG. 63 is an enlarged view of part I in FIG. [Figure 64] FIG. 64 is a schematic perspective view of the back assembly, armrest assembly, and sunshade of the child carrier shown in FIG. 52, with the armrest assembly in a first position. [Figure 65] FIG. 65 is a partially exploded view of FIG. [Figure 66] FIG. 66 is a partial cross-sectional view of FIG. [Figure 67] FIG. 67 is a schematic perspective view of the back assembly, armrest assembly, and sunshade of the child carrier shown in FIG. 52, with the armrest assembly in a second position. [Figure 68] FIG. 68 is a partially exploded view of FIG. [Figure 69] FIG. 69 is a schematic perspective view of the child carrier shown in FIG. 52, omitting the back assembly, armrest assembly, and sunshade. [Figure 70]FIG. 70 is a schematic perspective view of the child carrier shown in FIG. 69, further omitting the push assembly. [Figure 71] FIG. 71 is an enlarged view of part J in FIG. [Figure 72] FIG. 72 is an enlarged view of part K in FIG. [Figure 73] FIG. 73 is a partially exploded view of the structure shown in FIG. [Figure 74] FIG. 74 is a partial cross-sectional view of the child carrier shown in FIG. [Figure 75] FIG. 75 is an enlarged view of part L in FIG. [Figure 76] FIG. 76 is another partial cross-sectional view of the child carrier shown in FIG. [Figure 77] FIG. 77 is an enlarged view of part M in FIG. [Figure 78] FIG. 78 is a schematic perspective view of a child carrier according to yet another embodiment of the present application, with the frame in an unfolded state. [Figure 79] FIG. 79 is a schematic perspective view of the pusher assembly and first connection mechanism of the child carrier shown in FIG. 78, with the pusher assembly in an extended position. [Figure 80] Figure 80 is a schematic perspective view from another perspective of the pusher assembly and first connection mechanism of the child carrier shown in Figure 79 when connected to the push mounting base, with the pusher assembly in a retracted position. [Figure 81] FIG. 81 is a cross-sectional view of the pusher assembly shown in FIG. 80 from another perspective, with the pusher assembly in an unfolded position. [Figure 82] FIG. 82 is an enlarged view of part N in FIG. [Figure 83] 83 is a schematic perspective view of the first connection mechanism and lock mounting base shown in FIG. 79. FIG. [Figure 84] FIG. 84 is an enlarged view of part O in FIG. [Figure 85] FIG. 85 is an enlarged view of part P in FIG. [Figure 86]FIG. 86 is a schematic perspective view of the push hand assembly and first connection mechanism shown in FIG. 80 when connected to a push mounting base, with the first and second connecting rods omitted. [Figure 87] FIG. 87 is an enlarged view of part Q in FIG. [Figure 88] 88 is a schematic perspective view of the guide base of the pusher assembly shown in FIG. 79. FIG. [Figure 89] 89 is a cross-sectional view of the guide base shown in FIG. 88. FIG. [Figure 90] FIG. 90 is a schematic perspective view of a child carrier including a footrest device of a first example according to yet another embodiment of the present application, the footrest device being in use. [Figure 91] FIG. 91 is a schematic perspective view of the footrest device of the child carrier shown in FIG. 90 when not in use. [Figure 92] FIG. 92 is a schematic perspective view of the child carrier shown in FIG. 90 from another angle. [Figure 93] FIG. 93 is an enlarged view of the R portion in FIG. [Figure 94] FIG. 94 is a schematic perspective view of the footrest device of the child carrier shown in FIG. [Figure 95] FIG. 95 is a schematic perspective view of the footrest device shown in FIG. 94 in a semi-folded state. [Figure 96] FIG. 96 is a schematic perspective view of the footrest device shown in FIG. 94 in a folded state. [Figure 97] FIG. 97 is a cross-sectional view of the footrest device shown in FIG. 94 taken along line CC. [Figure 98] FIG. 98 is a cross-sectional view of the footrest device shown in FIG. 95 taken along line DD. [Figure 99] FIG. 99 is a schematic perspective view of a support member of the footrest device shown in FIG. [Figure 100] FIG. 100 is a schematic perspective view of a child carrier including a second example footrest device according to yet another embodiment of the present application, the footrest device being in use. [Figure 101] FIG. 101 is a schematic perspective view of the footrest device of the child carrier shown in FIG. 100 in an unused state, with the support member in a second rotated position. [Figure 102] 102 is a partial perspective view of the footrest assembly of the child carrier shown in FIG. 100. FIG. [Figure 103] FIG. 103 is a cross-sectional view of the footrest arrangement shown in FIG. 102 taken along line EE, with the fifth locking member in the first locking position. [Figure 104] FIG. 104 is a cross-sectional view of the footrest arrangement shown in FIG. 102 along line EE, with the fifth locking member in the first unlocked position. [Figure 105] FIG. 105 is a schematic perspective view of the footrest components and support member of the footrest arrangement shown in FIG. 103 in an unassembled state. [Figure 106] FIG. 106 is another schematic perspective view of the child carrier shown in FIG. 101, with the support member in the first rotated position. [Figure 107] FIG. 107 is another schematic perspective view of the child carrier shown in FIG. 101 with the support member between the first and second rotational positions. [Figure 108] FIG. 108 is a schematic perspective view of the child carrier shown in FIG. 101 from another perspective, with the support member in a second rotated position. [Figure 109] FIG. 109 is an enlarged view of the S portion of FIG. [Figure 110] FIG. 110 is a schematic perspective view of the front wheel and pedal device shown in FIG. 90 or FIG. [Figure 111] FIG. 111 is a schematic perspective view of the front wheel and pedal assembly shown in FIG. 110, with the pedal components and pedal base in an unassembled and separated state. [Figure 112] FIG. 112 is a schematic perspective view of the pedal device shown in FIG. [Figure 113] FIG. 113 is an exploded view of the pedal device shown in FIG. [Figure 114]FIG. 114 is a cross-sectional view of the pedal arrangement shown in FIG. 112 along line FF, with the sixth locking member in the first operating position. [Figure 115] FIG. 115 is another cross-sectional view of the pedal arrangement shown in FIG. 112 along the line FF, with the sixth locking member in the second operating position. [Explanation of symbols]

[0140] 100,frame; 110, first frame; 111, connecting rod member; 112, first connection; 120, second frame; 121, first movable connection; 1211, first through hole; 1212, ball base; 1213, first cover; 1214, second cover; 122, rear wheel connection; 123, Universal Ball; 1231, second through hole; 124, first wedge-shaped end face; 130, connection mechanism; 131, first connecting frame; 1311, side panel; 1312, connecting plate; 1313, first containment cavity; 1314, sheet connection; 1315, engagement groove; 1317, First Restricted Section; 1318, second limiting part; 1319, second containment cavity; 1319a, contact opening; 1319b, third limiting part; 132, second connecting frame; 1321, first housing; 1322, second housing; 1323, first receiving cavity; 1324, first end; 1325, second end; 1326, first trench; 1327, opening; 133, connecting rod; 1331, first connecting end; 1332, second connecting end; 134, rotating base; 1341, second wedge-shaped end face; 140, first locking part; 141, locking pin; 142, lock hook; 1421, engaging hook; 1422, second connection; 1423, third containment cavity; 1424, guide slope; 143, first reset member; 150, unlocking parts; 151, first pressing rod; 1511, pressing rod body; 1512, pressing section; 152, driving handle; 1521, cam section; 1522, handle section; 153, second reset member; 170, pressing rod mounting base; 171, first mounting groove; 172, first lock hole; 180, seat assembly; 181, guide boss; 1811, guide hole; R1, first rotation axis; R2, second rotation axis; R3, third rotation axis; R4, fourth rotation axis.

[0141] 20, wheel assembly; 200, backrest assembly; 210, backrest body; 211, mounting members; 2111, first pivot shaft; 2112, second pivot shaft; 2113, first annular mounting groove; 212, first pressing member; 2121, unlocking opening; 213, first backrest housing; 214, second backrest housing; 215a, pivot hole; 215b, first aspect; 217a, sixth containment cavity; 217b, seventh containment cavity; 217c, insertion opening; 218a, third through hole; 218b, fourth through hole; 219a, first cavity wall; 219b, second cavity wall; 220, mounting base; 221, first locking groove; 222, second pivot part; 222a, second mounting groove; 222b, second aspect; 230, handlebar assembly; 231, support base; 232, first handlebar; 2000, footrest device; 2100, support member; 2110, first end face; 2120, second end face; 2130, third connection; 2140, fourth connection; 2150, first pivot part; 2160, supporting body; 2200, connecting members; 2210, fixed part; 2300, footrest parts; 2310, first footrest; 2320, second footrest; 2321, first holding part; 2322, first mating ring; 2323, first internal gear part; 233, second handlebar; 2330, footrest body; 2330a, first insertion groove; 2331, second holding part; 2332, second mating ring; 2333, second internal gear part; 234, first synchronization mechanism; 2340, first pin shaft; 2340a, fourth locking groove; 2341, first external gear; 2342, second external gear; 235, locking mechanism; 2351, press button; 2352 , push button reset member; 2353, first tension member; 236, supporting body; 237, third cover; 2371, first working hole; ” 238, fourth cover; 240, fixed base; 241, engagement part; 2410, third pivot shaft; 242, mounting boss; 2420, fourth pivot shaft; 2421, containment trench; 243, axis of rotation; 250, connection base; 2500, fixed parts; 251, third housing; 2510, a first magnetic member; 2511, through holes; 2512, first pivot base; 2513, second pivot base; 252, fourth housing; 2520, second magnetic member; 2521, first housing part; 2522, second housing part; 2523, second operating hole; 2524, mounting openings; 2525, first edge; 2526, second edge; 2527, guide groove; 2528, guide rib; 2529, insertion opening; 2600, second synchronization mechanism; 261, fourth containment cavity; 2610, third drive member; 2610a, first gear tooth portion; 262, fifth containment cavity; 2620, fourth driving member; 2620a, second gear toothing; 270, second positioning mechanism; 271, third positioning recess; 272, fourth positioning recess; 273, second positioning protrusion; 274 , positioning reset member; 280, Fixtures; 290, second attachment; 291, fifth locking member; 291a, fifth lock hole; 292 , lock reset member.

[0142] 30, front wheel; 300, armrest assembly; 3000, pedal device; 310, armrest body; 3100, pedal parts; 3110, pedal body; 3110a, second insertion groove; 3120, second pin shaft; 3120a, five locking grooves; 320, first armrest rod; 3200, pedal base; 321, second locking groove; 3210, fifth housing; 3210a, fourth receiving groove; 3210b, receiving boss; 3210c, fourth receiving cavity; 3210d, insertion hole; 3210e, fourth limiting part; 3210f, first groove wall; 3210g, second groove wall; 322, third locking groove; 3220, sixth housing; 3220a, third operating hole; 3220b, mounting holes; 323, positioning groove; 330, second armrest rod; 3300, third attachment; 331, third operating member; 331a, operating part; 331b, fifth limiting part; 332 , operating reset member; 334, sixth locking member; 334a, sixth lock hole.

[0143] 40. Rear wheel.

[0144] 510, sunshade; 511, second pressing rod; 5111, engaging end; 5112, moving groove; 5113 , second pressing member; 512, rock rod; 5121, first rod; 5122, second rod; 513, unlocking operating member; 5131, connecting rods; 5132, block plates; 5133, pressing blocks; 514, first locking part; 515, second locking part; 516, the third lock.

[0145] 600, lighting assembly; 610, reflector; 620, LED components; 630, lamp holder.

[0146] 700, adjustment mechanism; 710, second locking part; 711, restricted hole; 712, limit pin; 720, operating parts; 721, unlocking member; 722, second tension member; 723, seventh reset member; 724, a third pressing member.

[0147] 800, first attachment; 810, first locking member; 811, first locking protrusion; 812, first drive pin; 813, second groove; 820, first drive member; 821, first driving groove; 830, first operating member; 840, third reset member; 8100, first locking mechanism; 8110, third locking member; 8111, first operating end; 8112, first lock end; 8120, third lock hole; 8130, sixth reset member; 8200, second locking mechanism; 8210, fourth locking member; 8211, second operating end; 8212, second locking end; 8220, fourth lock hole; 8230, pivot pin; 8240, eighth reset member.

[0148] 900, pusher assembly; 910, first connecting rod; 911, second receiving cavity; 912, second lock hole; 913, first through hole; 920, second connecting rod; 921, third receiving cavity; 922, second through hole; 930, length adjustment mechanism; 931, second locking member; 9311, second movable connection; 9312, second locking part; 9313, third drive pin; 932, second drive member; 9321, operating connections; 9322, drive connections; 9323, second driving groove; 9324, third driving groove; 9325, contact part; 933, second operating member; 9331, second drive pin; 934, fourth reset member; 935, guide base; 9351, first receiving trench; 9352, second receiving trench; 9353, slotted hole; 9354, third receiving trench; 940, locking mounting base; 950, push handle; 960, joint; D1, the direction of movement of the second working part; D2, the extension direction of the second driving groove; D3, direction of movement of the second drive; D4, the extension direction of the third driving groove; D5, the direction of movement of the second locking member; 9000, first positioning mechanism; 9100, first positioning recess; 9200, second positioning recess; 9300, first positioning protrusion; 9400, fifth reset member; M1, first pivot point; N1, second pivot point. DETAILED DESCRIPTION OF THE INVENTION

[0149] To facilitate understanding of the present application, the present application will now be described in more detail with reference to the associated drawings. Preferred embodiments of the present application are illustrated in the drawings. However, the present application may be embodied in many different forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0150] It should be noted that when an element is described as being "connected" to another element, the element may be directly connected to and integrated with the other element, or there may be intermediate elements present. Terms such as "attached," "at one end," and "at the other end" are used herein for descriptive purposes only.

[0151] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the present application. The term "and / or" used herein includes all combinations of one or more of the associated items.

[0152] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be described in more detail below with reference to the drawings and embodiments, and it should be understood that the specific embodiments described herein are for the purpose of illustrating the present application and are not intended to limit the present application.

[0153] An embodiment of the present application provides a child transport device, which may be, for example, a child's tricycle, a child's balance car, a child's bicycle, or a child's motorcycle. As shown in FIGS. 1 to 3 , the child transport device includes a frame 100, a front wheel 30, two rear wheels 40, a handlebar assembly 230, and a seat assembly 180. The handlebar assembly 230 is generally disposed in front of and above the frame 100 or the seat assembly 180. The front wheel 30 is generally disposed in front of and below the frame 100 or the seat assembly 180. The two rear wheels 40 are generally disposed behind and below the frame 100 or the seat assembly 180. The handlebar assembly 230 is height-adjustable, and the adjustment process is simple. The frame 100 has an unfolded state and a folded state. The frame 100 includes a first frame 110, a second frame 120, a connecting mechanism 130, a first locking component 140 (see FIG. 4), and an unlocking component 150.

[0154] As shown in FIG. 4, the first frame 110 includes a connecting rod member 111 and a first connecting portion 112 connected to the connecting rod member 111. Both ends of the connecting rod member 111 are connected to the front wheel 30 and the handlebar assembly 230, respectively. The first connecting portion 112 is rotatably connected to the linkage mechanism 130. The second frame 120 is connected to the rear wheel 40 and is rotatably connected to the linkage mechanism 130. When the frame 100 switches from the unfolded state shown in FIG. 1 to the semi-folded state shown in FIG. 2 and further to the folded state shown in FIG. 3, the first frame 110 and the second frame 120 move closer to each other. The rear wheel 40 and the front wheel 30 move closer to each other.

[0155] As shown in FIG. 4, the coupling mechanism 130 includes a first connection frame 131, a second connection frame 132, a connecting rod 133, and a rotation base 134. Referring to FIG. 5, the first connection frame 131 is rotatably connected to the first frame 110 via a first rotation axis R1, the second connection frame 132 is rotatably connected to the first frame 110 via a second rotation axis R2, and the first connection frame 131 is rotatably connected to the second frame 120 via a third rotation axis R3. In this embodiment, the first rotation axis R1, the second rotation axis R2, and the third rotation axis R3 are arranged substantially horizontally in the left-right direction of the frame 100. The first rotation axis R1 is adjacent to the front of the frame 100, i.e., adjacent to the handlebar assembly 230. The third rotation axis R3 is adjacent to the rear of the frame 100, i.e., located away from the handlebar assembly 230. The second rotation axis R2 is located between the first rotation axis R1 and the third rotation axis R3.

[0156] As shown in FIGS. 4 to 6 , the first connection frame 131 includes two opposing side plates 1311 and a connecting plate 1312 connected between the side plates 1311. The two side plates 1311 and the connecting plate 1312 surround a first receiving cavity 1313. In this embodiment, the first connection frame 131 is integrally formed, which provides the first connection frame 131 with high strength and the ability to withstand a larger load. In another embodiment, the first connection frame 131 can be formed by connecting two independent side plates 1311 and the connecting plate 1312 by welding, riveting, or the like. To improve the strength of the first connection frame 131, a reinforcing rib (not shown) can be disposed between the two side plates 1311. The first connection frame 131 can be provided with a sheet connecting portion 1314. The sheet connecting portion 1314 is provided with an engagement groove 1315. A portion of the seat assembly 180 is inserted into the engagement groove 1315 and fixedly connected to the seat connection portion 1314. The seat assembly 180 and the seat connection portion 1314 surround a second accommodating cavity 1319. The second accommodating cavity 1319 communicates with the first accommodating cavity 1313. Alternatively, the second accommodating cavity 1319 may simply be disposed in the seat connection portion 1314. As shown in FIGS. 7 and 8, the first frame 110 is rotatably connected to two side plates 1311 of the first connecting frame 131 via a first rotation axis R1.

[0157] 9 and 10 , the second connection frame 132 includes a first housing 1321 and a second housing 1322. The first housing 1321 and the second housing 1322 surround a first receiving cavity 1323. Referring to FIGS. 6 and 8 , at least a portion of the second connection frame 132 extends into the first receiving cavity 1313. The second connection frame 132 has a first end 1324 and a second end 1325. The first end 1324 of the second connection frame 132 is rotatably connected to the first frame 110 via a second rotation axis R2, and the second end 1325 of the second connection frame 132 is connected to the rotation base 134.

[0158] As shown in Figures 5 and 6, when the frame 100 is in the unfolded state, the second connecting frame 132 is located below the connecting plate 1312 on the top of the first connecting frame 131. The second connecting frame 132, the first connecting frame 131, and the first frame 110 form a relatively smooth outer surface, making the overall appearance of the frame 100 more simple and aesthetically pleasing. Note that in this application, all descriptions of directions such as "up," "down," "left," "right," "front," and "rear" are based on the unfolded state of the frame 100 (see Figure 1).

[0159] 5 and 6, the connecting rod 133 includes a first connecting end 1331 and a second connecting end 1332. The first connecting end 1331 is disposed within the first receiving cavity 1323. The second rotation axis R2 extends through the first frame 110, the second connecting frame 132, and the first connecting end 1331, coaxially connecting the second connecting frame 132, the connecting rod 133, and the first frame 1331 in a rotatable manner. The second connecting end 1332 is located outside the first receiving cavity 1323 and rotatably connected to the rotation base 134. In this embodiment, the connection point between the second connecting end 1332 and the rotating base 134 is offset from the connection point between the second connecting frame 132 and the rotating base 134, such that the second connecting frame 132, the connecting rod 133, and the rotating base 134 are connected to one another and substantially form a relatively fixed triangle. In other embodiments, the connecting rod 133 can be omitted. For example, the second connecting frame 132 and the rotating base 134 are fixedly connected via multiple pin shafts and configured to limit rotation between them.

[0160] As shown in FIGS. 4 and 5 , the first locking component 140 includes a locking pin 141, a locking hook 142, and a first reset member 143. In one embodiment, the locking pin 141 is connected to the first connection frame 131. Specifically, referring to FIG. 6 , the locking pin 141 is connected to at least one side plate 1311 of the first connection frame 131, and at least a portion of the locking pin 141 is disposed in the first receiving cavity 1313. In this embodiment, both ends of the locking pin 141 are respectively connected to the two side plates 1311 of the first connection frame 131. Referring to FIGS. 6 and 8 , the locking hook 142 includes an engaging hook 1421, a second connecting portion 1422, and a guide inclined surface 1424. The second connecting portion 1422 is disposed in the first receiving cavity 1323 and is pivotally connected to the connecting rod 133.

[0161] As shown in FIGS. 6 and 9 , the second connection frame 132 further includes an opening 1327 that communicates with the first receiving cavity 1323. The engagement hook 1421 can pass through the opening 1327 and extend outward from the first receiving cavity 1323. The engagement hook 1421 is rotatable relative to the second connection frame 132 and can engage with the lock pin 141 to limit the relative rotation between the first frame 110 and the second frame 120. When the engagement hook 1421 rotates until it abuts against the side wall of the opening 1327, the lock hook 142 cannot continue rotating in the same direction. Therefore, the rotation range of the lock hook 142 can be limited by adjusting the size and position of the opening 1327.

[0162] As shown in FIGS. 6 and 9 , the second connection frame 132 has a first groove 1326. The first groove 1326 is disposed on the edge of the opening 1327. The engagement hook 1421 and the first groove 1326 may surround a third accommodating cavity 1423. The lock pin 141 may extend through the third accommodating cavity 1423. A guide inclined surface 1424 is provided adjacent to the engagement hook 1421. As shown in FIGS. 7 and 8 , when the second frame 120 switches from the folded state to the unfolded state, the lock pin 141 moves toward the engagement hook 1421 together with the first connection frame 131. The lock pin 141 presses the guide inclined surface 1424 to rotate the lock hook 142. This allows the lock pin 141 to enter the third accommodating cavity 1423 and lock the second frame 120 in the unfolded state (see FIGS. 5 and 6 ). The first reset member 143 is disposed between the lock hook 142 and the connecting rod 133. The first reset member 143 biases the lock hook 142 to rotate and engage with the lock pin 141. The first reset member 143 may be an elastic member such as a torsion spring, a resilient piece, a tension spring, or a compression spring. In this embodiment, the first reset member 143 is a torsion spring.

[0163] As shown in FIGS. 6 and 8 , the unlocking component 150 includes a first pressing rod 151, a driving handle 152, and a second reset member 153. The first pressing rod 151 is movably disposed on the first connecting frame 131. The first pressing rod 151 includes a pressing rod body 1511 and a pressing portion 1512 fixed to the pressing rod body 1511. The pressing rod body 1511 is rod-shaped. At least a portion of the pressing rod body 1511 is movably disposed within the second accommodating cavity 1319. A first end of the pressing rod body 1511 abuts against the second reset member 153, and a second end extends outward from the second accommodating cavity 1319 to abut against the driving handle 152. The pressing portion 1512 is connected to a surface of the pressing rod body 1511 facing the lock hook 142 and the lock pin 141. That is, when the child carrier is in the unfolded state, the pushing portion 1512 is located below the pushing rod body 1511 and above the lock pin 141. The seat connection portion 1314 is further provided with a first limiting portion 1317 and a second limiting portion 1318. The pushing portion 1512 is located between the first limiting portion 1317 and the second limiting portion 1318 and is movable between the first limiting portion 1317 and the second limiting portion 1318. At least a portion of the pushing portion 1512 protrudes into the second accommodating cavity 1319. The pushing portion 1512 moves together with the pushing rod body 1511, rotating the locking hook 142 to disengage the locking hook 142 from the locking pin 141 and allowing the first frame 110 and the second frame 120 to approach each other. In this embodiment, the first pushing rod 151 is integrally formed. In another embodiment, the first pressing rod 151 can be formed by connecting a pressing rod body 1511 and a pressing portion 1512 that are independent of each other by soldering, welding, or the like.

[0164] Continuing to refer to FIGS. 6 and 8, the driving handle 152 is rotatably connected to the first connection frame 131 and abuts against the first pressing rod 151. Specifically, the driving handle 152 includes a cam portion 1521 and a handle portion 1522 connected to the cam portion 1521. The cam portion 1521 is rotatably connected to the first connection frame 131 and can abut against the first pressing rod 151. Specifically, a contact opening 1319a is formed at one end of the second accommodating cavity 1319, and the end of the first pressing rod 151 remote from the second reset member 153 can abut against the cam portion 1521 through the contact opening 1319a. A third limiting portion 1319b is formed by the wall of the contact opening 1319a. The third limiting portion 1319b can abut against the cam portion 1521 to limit the rotation angle of the cam portion 1521. When the driving handle 152 rotates, the cam portion 1521 drives and moves the pressing rod body 1511, and the pushing portion 1512 rotates the locking hook 142, disengaging the locking hook 142 from the locking pin 141. The driving handle 152 then continues to press and rotate the third limiting portion 1319b, rotating and folding the first connecting frame 131 relative to the first frame 110. The handle portion 1522 not only makes it easier for the user to rotate the driving handle 152, but can also be used to lift the folded frame 100 (see FIG. 3 ). In other embodiments, the driving handle 152 can be omitted. For example, the locking hook 142 can be rotated by directly manually pushing the first pressing rod 151. The second resetting member 153 can be an elastic member or piece, such as a spring. In this embodiment, the second resetting member 153 is a spring. The second reset member 153 is disposed between the first connecting frame 131 and the first pressing rod 151. Specifically, the second reset member 153 is disposed within the first accommodating cavity 1313. One end of the second reset member 153 abuts against the wall of the first accommodating cavity 1313, and the other end of the second reset member 153 abuts against the first pressing rod 151. The second reset member 153 biases the pressing portion 1512 to move in a direction away from the lock hook 142.

[0165] As shown in Figures 11 and 12, in this embodiment, two second frames 120 are provided. The two second frames 120 are arranged on either side of the connecting mechanism 130 and are rotatably connected to the connecting mechanism 130. When the frame 100 switches from the unfolded state to the folded state, the two rear wheels 40 move closer to each other. In other embodiments, one or more second frames 120 may be provided. The number of second frames 120 is not limited in this application as long as the second frames 120 can be folded via the connecting mechanism 130.

[0166] Specifically, the second frame 120 on one side will be described by way of example.

[0167] As shown in FIGS. 13 and 14 , the second frame 120 includes a first movable connection portion 121 and a rear wheel connection portion 122. One end of the rear wheel connection portion 122 is connected to the first movable connection portion 121, and the other end of the rear wheel connection portion 122 is connected to the rear wheel 40. The first movable connection portion 121 is rotatably connected to the first connection frame 131 via a third rotation axis R3. The third rotation axis R3 is fixedly connected to the first connection frame 131 and is disposed below the seat assembly 180. Referring to FIGS. 18 and 19 , the first movable connection portion 121 is provided with a first through hole 1211. The plane on which the opening of the first through hole 1211 is located is angled with respect to the third rotation axis R3 and is not perpendicular to the third rotation axis R3. The third rotation axis R3 extends through the first through hole 1211. When the third rotation axis R3 rotates, the first movable connection part 121 is driven to rotate relative to the third rotation axis R3, and can move along the third rotation axis R3.

[0168] As shown in FIGS. 13 and 14 , the second frame 120 is rotatably connected to the rotation base 134 via a fourth rotation axis R4. The extension direction of the fourth rotation axis R4 intersects with, but is not perpendicular to, the extension direction of the third rotation axis R3. When the first connection frame 131 rotates and folds relative to the first frame 110, the third rotation axis R3 is fixed to the first connection frame 131, so the first movable connection part 121 and the third rotation axis R3 are rotatable relative to each other. As a result, the first movable connection part 121 is driven to move along the third rotation axis R3, and at the same time, the second frame 120 is driven to rotate around the fourth rotation axis R4, causing the rear wheels 40 connected to the second frame 120 to move closer to each other, as shown in FIGS. 13 and 15 . That is, when the frame 100 switches from the unfolded state to the folded state, the first movable connection part 121 of the second frame 120 rotates relative to the third rotation axis R3, and the first movable connection part 121 is driven to move along the third rotation axis R3. Because the first movable connection part 121 is part of the second frame 120 and is connected to the rear wheel connection part 122, the rear wheel connection part 122 of the second frame 120 is further driven to rotate about the fourth rotation axis R4, thereby causing the rear wheels 40 connected to the two second frames 120 to move closer to each other. When the frame 100 switches from the folded state to the unfolded state, the movement process of the second frame 120 is the reverse of the process when the frame 100 switches from the unfolded state to the folded state described above, and will not be described again here.

[0169] 18 and 19, the first movable connection part 121 is provided with a universal ball 123. The universal ball 123 is provided with a second through hole 1231. Referring to FIG. 14, the third rotation axis R3 extends through the second through hole 1231. The hole wall of the first through hole 1211 forms a ball base 1212 configured to receive at least a portion of the universal ball 123. The ball base 1212 is rotatable along the surface of the universal ball 123. Specifically, the first movable connection part 121 is surrounded by a first cover 1213 and a second cover 1214. The first cover 1213 and the second cover 1214 are detachably connected. If the universal ball 123 is omitted and the second frame 120 tilts and rotates around the fourth rotation axis R4, the gap between the first through hole 1211 and the third rotation axis R3 allows the first movable connecting part 121 to swing in the radial direction of the third rotation axis R3. Due to the multi-degree-of-freedom rotation of the universal ball 123 within the ball base 1212, when the first movable connecting part 121 tilts and rotates around the third axis R3, the universal ball 123 can always fill the gap between the first through hole 1211 and the third rotation axis R3, thereby preventing the first movable connecting part 121 from swinging in the radial direction when rotating around the third rotation axis R3. This configuration allows the second frame 120 to rotate and fold more smoothly around the first connecting frame 131.

[0170] 16 and 18 , the second frame 120 includes a first wedge-shaped end surface 124. The first wedge-shaped end surface 124 is particularly disposed in a portion of the rear wheel connection portion 122 adjacent to the rotation base 134. The rotation base 134 includes a second wedge-shaped end surface 1341. When the second frame 120 rotates relative to the rotation base 134 about the fourth rotation axis R4, the first wedge-shaped end surface 124 movably abuts against the second wedge-shaped end surface 1341, thereby always maintaining contact as the first wedge-shaped end surface 124 rotates relative to the second wedge-shaped end surface 1341. When rotating relative to wedge end face 1341, first wedge end face 124 movably abuts against second wedge end face 1341, when rotating relative to wedge end face 134, first wedge end face 124 movably abuts against second wedge end face 1341, when rotating relative to wedge end face 134, first wedge end face 124 movably abuts against second wedge end face 1341, when rotating relative to wedge end face 134, first wedge end face 124 movably abuts against second wedge end face 1341, when rotating relative to wedge end face 134,

[0171] The specific folding method of the above frame 100 is as follows.

[0172] 5 and 6, when the drive handle 152 is rotated in the direction F1 shown in Fig. 6, the cam portion 1521 pushes the first pushing rod 151, causing the first pushing rod 151 to move in the direction F2. As a result, the pushing portion 1512 of the first pushing rod 151 pushes the lock hook 142, causing the lock hook 142 to rotate in the direction F3, disengaging the lock hook 142 from the lock pin 141, and unlocking the first locking component 140. As shown in Figures 7 and 8, the drive handle 152 continues to rotate in direction F1, driving the first connection frame 131 to rotate relative to the first frame 110, thereby driving the second connection frame 132 to rotate relative to the first connection frame 131, causing the second frame 120 to rotate relative to the first connection frame 131 and the second connection frame 132, thereby moving the second frame 120 closer to the first frame 110.

[0173] Due to the cooperation of the third rotation axis R3 and the fourth rotation axis R4, the first movable connection part 121 of the second frame 120 can rotate together with the third rotation axis R3 and move along the third rotation axis R3, so that the second frame 120 and the rear wheels 40 on both sides of the rotation base 134 approach each other, and finally reach the folded state as shown in FIG. 3.

[0174] The child carrier frame 100 of the present application is easily foldable. When the frame 100 is fully folded, the overall size of the child carrier is minimized, making it easier to carry, store, and transport.

[0175] 20, 22, and 23, when the frame 100 switches from the unfolded state to the folded state, the rotation of the second connecting frame 132 switches the handlebar assembly 230 from the locked state to the unlocked state via the first tension member 2353, causing the handlebar assembly 230 to fold along with the frame 100. The folding of the handlebar assembly 230 further reduces the size of the child carrier for easier carrying, storage, and transportation.

[0176] Specifically, as shown in FIGS. 20 to 22 , the handlebar assembly 230 includes a support base 231, a first handlebar 232, a second handlebar 233, a first synchronization mechanism 234, and a locking mechanism 235. The locking mechanism 235 has a locked state and an unlocked state. The connecting rod member 111 of the first frame 110 is fixed to the bottom of the support base 231. The first handlebar 232 and the second handlebar 233 are disposed on the upper part of the support base 231. The first handlebar 232 and the second handlebar 233 are rotatable relative to the support base 231. The first handlebar 232 is an arc-shaped rod. Two ends of the arc-shaped rod are provided with a first connecting portion and a first retaining portion 2321, respectively. In this embodiment, the first connecting portion is a first fitting ring 2322. Similar to the first handlebar 232, the second handlebar 233 is also an arc-shaped rod, and has a second connecting portion and a second retaining portion 2331 at each of the two ends of the arc-shaped rod. In this embodiment, the second connecting portion is a second mating ring 2332. The first synchronization mechanism 234 and the locking mechanism 235 are both disposed within the support base 231. In other embodiments, the handlebar assembly 230 may include two or more handlebars, i.e., the first handlebar 232 and the second handlebar 233. For example, the handlebar assembly 230 may include three or more handlebars, or may have only one handlebar, and this is not a limitation of this application.

[0177] A specific configuration of the handlebar assembly 230 according to the present application will be described below with reference to FIGS. 25 to 47. Those skilled in the art will understand that although the child carrier shown in FIG. 25 has a slightly different configuration from the child carrier shown in FIG. 1, the handlebar assembly 230 can be used in common with both the child carrier shown in FIG. 25 and the child carrier shown in FIG. 1. In other words, the handlebar assembly 230 may be a detachable, independent assembly. Unless technically inconsistent, the handlebar assembly 230 can be applied to any child carrier other than those shown in FIGS. 1 and 25.

[0178] Specifically, as shown in FIGS. 26 to 28 , the support base 231 has a generally column-like structure and is configured to be connected to the frame 100. Specifically, the support base 231 includes a support body 236, a third cover 237, and a fourth cover 238. The support body 236 and the third cover 237 fit together to form a first mounting cavity (not shown). The bottom of the support body 236 is configured to be connected to the frame 100. A disk-shaped mounting member 211 is disposed on the top of the support body 236. The mounting member 211 has a generally annular structure. A first pivot shaft 2111 and a second pivot shaft 2112 are provided at approximately the center of the mounting member 211, spaced apart from each other. A first annular mounting groove 2113, to which the first handlebar 232 is attached, is formed on the surface of the mounting member 211 facing the third cover 237. A second annular mounting groove (not shown) is provided on a surface of the mounting member 211 away from the third cover 237, to which the second handlebar 233 is attached. A second mating ring 2332 of the second handlebar 233 and a first mating ring 2322 of the first handlebar 232 are fixed to two surfaces of the mounting member 211, respectively. A fourth cover 238 is fixed to the first mating ring 2322. In other embodiments, the handlebar assembly 230 may not include the first handlebar 232 and the second handlebar 233. The handlebar assembly 230 may include two or more handlebars, or may include less than two handlebars, as needed.

[0179] Specifically, as shown in FIGS. 28 to 30 , the first handle bar 232 is an arc-shaped rod. Both ends of the arc-shaped rod include a first connecting portion and a first retaining portion 232, respectively. In this embodiment, the first connecting portion is a first fitting ring 2322. Like the first handle bar 232, the second handle bar 233 is also an arc-shaped rod, and both ends of the arc-shaped rod include a second connecting portion and a second retaining portion 2331, respectively. In this embodiment, the second connecting portion is a second fitting ring 2332. The first fitting ring 2322 and the second fitting ring 2332 are rotatably attached to the left and right sides of the mounting member 211. 31 to 33, when the first mating ring 2322 and the second mating ring 2332 rotate relative to each other, the first holding portion 2321 and the second holding portion 2331 are driven to rotate relative to each other, thereby adjusting the usable height of the first holding portion 2321 and the second holding portion 2331. Furthermore, as shown in FIGS. 34 and 35, when folding the frame 100, the first handlebar 232 and the second handlebar 233 can also be rotated to the folded state, thereby reducing the overall folded volume of the child carrier.

[0180] In other embodiments, the first handlebar 232 and the second handlebar 233 may be L-shaped rods or the like, as long as the usage height of the first holding portion 2321 and the second holding portion 2331 can be adjusted by rotating the first fitting ring 2322 and the second fitting ring 2332. Furthermore, the first connecting portion and the second connecting portion may be parts other than fitting rings, such as, but are not limited to, fitting plates.

[0181] 28 to 30, a surface of the first mating ring 2322 is fixed to the first annular mounting groove 2113, and a first locking groove 221 is disposed at the edge of another surface of the first mating ring 2322. A first internal gear portion 2323 is disposed circumferentially on the inner wall of the first mating ring 2322. One surface of the second mating ring 2332 is fixed to the second annular mounting groove. A second locking groove 321 and a third locking groove 322 are disposed at the edge of another surface of the second mating ring 2332. The first locking groove 221 faces the second locking groove 321. The second internal gear portion 2333 is disposed circumferentially on the inner wall of the second mating ring 2332.

[0182] As shown in FIGS. 22 and 23 , the first synchronization mechanism 234 includes a first drive element and a second drive element. The first drive element is drivingly connected to the first handlebar 232, and the second drive element is drivingly connected to the second handlebar 233, and the first drive element and the second drive element are drivingly connected. Synchronous adjustment of the use heights of the first handlebar 232 and the second handlebar 233 can be achieved through the first drive element and the second drive element. In this embodiment, the first drive element is a first external gear 2341, and the second drive element is a second external gear 2342. The first external gear 2341 and the second external gear 2342 mesh with each other. 24, the first fitting ring 2322 is provided with a first internal gear portion 2323 that can mesh with the first external gear 2341, and the second fitting ring 2332 is provided with a second internal gear portion 2333 that can mesh with the second external gear 2342. In this way, when either the first handle bar 232 or the second handle bar 233 is rotated, the other of the first handle bar 232 and the second handle bar 233 is driven synchronously via the first external gear 2341 and the second external gear 2342, and the heights of the first holding portion 2321 and the second holding portion 2331 are adjusted synchronously.

[0183] Specifically, as shown in FIG. 36 , the first synchronization mechanism 234 includes a first drive element and a second drive element. The first drive element is drivingly connected to the first handlebar 232, and the second drive element is drivingly connected to the second handlebar 233, with the first drive element and the second drive element being drivingly connected in a teeth configuration. Synchronous adjustment of the use heights of the first handlebar 232 and the second handlebar 233 can be achieved through the first drive element and the second drive element. In this embodiment, the first drive element is a first external gear 2341, and the second drive element is a second external gear 2342. The first external gear 2341 is fitted to the first pivot shaft 2111 and is rotatable about the first pivot shaft 2111. The second external gear 2342 is fitted to the second pivot shaft 2112 and is rotatable around the second pivot shaft 2112. The first external gear 2341 and the second external gear 2342 mesh with each other. As shown in FIGS. 37 to 39 , the first external gear 2341 is closer to the fourth cover 238 in the axial direction than the second external gear 2342, and therefore the first external gear 2341 and the second external gear 2342 only partially mesh with each other in the axial direction. That is, a portion of the first external gear 2341 away from the fourth cover 238 meshes with a portion of the second external gear 2342 adjacent to the fourth cover 238. Furthermore, a portion of the first external gear 2341 close to the fourth cover 238 meshes with the first internal gear portion 2323 of the first mating ring 2322, and a portion of the second external gear 2342 away from the fourth cover 238 meshes with the second internal gear portion 2333 of the second mating ring 2332.

[0184] In this way, when one of the first handle bar 232 and the second handle bar 233 rotates, the other of the first handle bar 232 and the second handle bar 233 is driven synchronously via the first external gear 2341 and the second external gear 2342, and the heights of the first holding portion 2321 and the second holding portion 2331 can be adjusted synchronously. Specifically, as shown in FIG. 40 , for example, when the first handle bar 232 (or the first holding portion 2321) is rotated clockwise (i.e., direction F4), the first fitting ring 2322 rotates in direction F4, and at the same time, the first internal gear portion 2323 rotates the first external gear 2341 counterclockwise (i.e., direction F5). Then, the first external gear 2341 simultaneously rotates the second external gear 2342 in direction F4. When the second external gear 2342 rotates, the second internal gear portion 2333 also rotates the second fitting ring 2332 in the direction F5. In this way, the first holding portion 2321 and the second holding portion 2331 rotate toward or away from each other, thereby achieving synchronous adjustment of the usage heights of the first handlebar 232 (or the first holding portion 2321) and the second handlebar 233 (or the second holding portion 2331).

[0185] In other embodiments, the first drive element and the second drive element may be other drive parts such as connecting rods, and in short, it is sufficient that the first handlebar 232 and the second handlebar 233 can be synchronously adjusted. Furthermore, the first internal gear portion may be provided on only a portion of the inner wall of the first fitting ring 2322, and the second internal gear portion may be provided on only a portion of the inner wall of the second fitting ring 2332. In this way, the height adjustment range of the first handlebar 232 and the second handlebar 233 can be limited. Similarly, gears may be provided on only a portion of the outer walls of the first external gear 2341 and the second external gear 2342.

[0186] Furthermore, as shown in FIGS. 22 to 24 , when the locking mechanism 235 is in a locked state, the first handle bar 232 and the second handle bar 233 are fixed relative to each other at a certain usable height. When the locking mechanism 235 is in an unlocked state, the first handle bar 232 and the second handle bar 233 are rotatable relative to each other and can be adjusted to other usable heights. Specifically, the locking mechanism 235 includes a push button 2351, a push button reset member 2352, and / or a first tension member 2353. The push button 2351 is movably disposed within the support base 231. The push button 2351 has a first position and a second position. When the push button 2351 is in the first position, the push button 2351 locks the first handle bar 232 and the second handle bar 233 relative to each other. When the push button 2351 is in the second position, the push button 2351 unlocks the first handle bar 232 and the second handle bar 233. In this embodiment, the first position is located above the second position. The two ends of the push button reset member 2352 abut against the support base 231 and the push button 2351, respectively. The push button reset member 2352 biases the push button 2351 to move to the first position. A first end of the first tension member 2353 is connected to the push button 2351, and a second end of the first tension member 2353 is connected to the linkage mechanism 130. Specifically, a first end of the first tension member 2353 extends into the support base 231 and is connected to the push button 2351, and a second end of the first tension member 2353 is connected to the second connection frame 132. When the frame 100 switches from the unfolded state to the folded state, the second connecting frame 132 rotates, moving the push button 2351 from the first position to the second position via the first tension member 2353, and the locking mechanism 235 switches from the locked state to the unlocked state, so that the first handlebar 232 and the second handlebar 233 are folded together with the frame.

[0187] With the above configuration, the child carrier has at least the following technical effects.

[0188] When the frame 100 switches from the unfolded state to the folded state, the linkage 130 rotates relative to the first frame 110, driving the second frame 120 to rotate, so that the second frame 120 moves toward the first frame 110. The child carrier has high structural stability, and the linkage 130 allows the frame 100 to be folded and unfolded very conveniently. When the frame 100 is fully folded, the overall size of the child carrier can be minimized, making it easy to carry, store, and transport.

[0189] The frame of the child carrier of the present application can be folded using a connecting mechanism, reducing the overall size of the child carrier, making it easier to carry, store, and transport, and the folding operation is also simple.

[0190] In other embodiments, the first tension member 2353 may be omitted. For example, the push button 2351 may be provided with an unlocking action member 513. The unlocking action member 513 protrudes at least partially from the outer surface of the support base 231 and can be directly pressed by a user, thereby moving the push button 2351 from the first position to the second position and switching the locking mechanism 235 from the locked state to the unlocked state.

[0191] Specifically, as shown in FIGS. 41 and 42 , the locking mechanism 235 includes a push button 2351 and a push button reset member 2352. The push button 2351 is movably disposed within a first mounting cavity of the support base 231. Specifically, as shown in FIG. 43 , the push button 2351 includes a second push rod 511, a lock rod 512, and an unlocking operation member 513. In this embodiment, the push button 2351 is integrally formed. In other embodiments, the push button 2351 may be formed by soldering, welding, or otherwise connecting the second push rod 511, lock rod 512, and unlocking operation member 513, which are independent of one another. The second push rod 511 has an engagement end 5111. The lock rod 512 is generally L-shaped and includes a first rod 5121 and a second rod 5122 disposed at an angle to one another. The end of the first rod 5121 remote from the second rod 5122 is fixed to the second pressing rod 511 at a right angle and adjacent to the engagement end 5111. That is, the angle between the first rod 5121 and the second pressing rod 511 is 90 degrees. In other embodiments, the angle between the first rod 5121 and the second pressing rod 511 may be greater or less than 90 degrees. The second rod 5122 is provided with a first locking portion 514, and the engagement end 5111 is provided with a second locking portion 515. The unlocking member 513 is fixed to the second pressing rod 511 and is spaced apart from the engagement end 5111. The unlocking member 513 and the locking rod 512 are respectively disposed on both sides of the second pressing rod 511. A moving groove 5112 is formed on a side surface near the center of the second pressing rod 511. A third locking portion 516 is formed on a side wall of the moving groove 5112, specifically on a side wall adjacent to the unlocking member 513. Specifically, as shown in FIGS. 42 and 44, the second pressing rod 511 is movably arranged on the side of the second fitting ring 2332 facing the third cover 237. The locking rod 512 passes through the second fitting ring 2332, the mounting member 211, and the first fitting ring 2322 in that order.The second rod 5122 of the lock rod 512 is located on the side of the first mating ring 2322 away from the mounting member 211, i.e., the first mating ring 2322 and the second mating ring 2332 are located between the second rod 5122 and the engagement end 5111.

[0192] As described above, the push button 2351 has a first position and a second position. As shown in FIGS. 44 to 46 , when the push button 2351 is in the first position, the first locking portion 514, the second locking portion 515, and the third locking portion 516 are engaged with the first locking groove 221, the second locking groove 321, and the third locking groove 322, respectively. As a result, the first mating ring 2322 and the second mating ring 2332 cannot rotate relative to each other, the first holding portion 2321 and the second holding portion 2331 are fixed at a certain usage height, and the push button 2351 locks the first handle bar 232 and the second handle bar 233 together. 47 , when the push button 2351 is in the second position, the first locking portion 514, the second locking portion 515, and the third locking portion 516 are disengaged from the first locking groove 221, the second locking groove 321, and the third locking groove 322, respectively. The first mating ring 2322 and the second mating ring 2332 are rotatable relative to each other, and the push button 2351 unlocks the first handle bar 232 and the second handle bar 233. In this case, the usage heights of the first holding portion 2321 and the second holding portion 2331 can be adjusted simultaneously by pressing the first handle bar 232 or the second handle bar 233. In this embodiment, two first locking grooves 221, two second locking grooves 321, and two third locking grooves 322 are provided, which serve to fix the first holding portion 2321 and the second holding portion 2331 at two different heights. In other embodiments, two or more first locking grooves 221, two or more second locking grooves 321, and two or more third locking grooves 322 may be provided.

[0193] 28 and 43 , in this embodiment, a first operating hole 2371 is provided in the third cover 237, and at least a portion of the unlocking operating member 513 is operable to protrude from the surface of the support base 231 through the first operating hole 2371. Specifically, the unlocking operating member 513 includes a connecting rod 5131, a block plate 5132, and a pressing block 5133. Both ends of the connecting rod 5131 are connected to the second pressing rod 511 and the block plate 5132, respectively. The pressing block 5133 is connected to the block plate 5132. The connecting rod 5131 and the block plate 5132 are disposed in the first mounting cavity, and the block plate 5132 always covers the first operating hole 2371. The pressing block 5133 protrudes from the first mounting cavity through the first operating hole 2371, and the pressing block 5133 is movable along the first operating hole 2371. In this way, movement of the pressing block 5133 moves the entire pressing button 2351, and at the same time, the block plate 5132 blocks the first operating hole 2371 to prevent entrapment. As shown in FIGS. 46 and 47 , the second position is located below the first position. That is, by pressing the unlocking operating member 513 downward, the first locking portion 514, the second locking portion 515, and the third locking portion 516 are unlocked from the first locking groove 221, the second locking groove 321, and the third locking groove 322, respectively. This allows the use heights of the first holding portion 2321 and the second holding portion 2331 to be adjusted synchronously by pressing the first handle bar 232 or the second handle bar 233.

[0194] 46 and 47, the mounting member 211 includes a first pressing member 212, and a second pressing member 5113 is disposed on the second pressing rod 511. The second pressing member 5113 is located above the first pressing member 212. Both ends of the press button reset member 2352 abut against the first pressing member 212 and the second pressing member 5113, respectively. The press button reset member 2352 biases the press button 2351 to move to the first position. In this way, when the external force acting on the unlocking operation member 513 is removed, the push button 2351 moves to the first position due to the action of the push button reset member 2352, and the first locking portion 514, the second locking portion 515, and the third locking portion 516 re-engage with the first locking groove 221, the second locking groove 321, and the third locking groove 322, respectively, thereby fixing the first handle bar 232 and the second handle bar 233 relative to each other, and fixing the first holding portion 2321 and the second holding portion 2331 at a certain usage height.

[0195] In other embodiments, the second locking groove 321 and the third locking groove 322 do not need to be arranged opposite each other. The second locking groove 321 and the third locking groove 322 may be arranged at intervals around the circumference of the second mating ring 2332. In other embodiments, the third locking portion 516 and the third locking groove 322 may also be omitted, and the press button 2351 may lock the first mating ring 2322 and the second mating ring 2332 only through cooperation between the first locking portion 514 and the first locking groove 221 and cooperation between the second locking portion 515 and the second locking groove 322. Furthermore, in other embodiments, the first locking portion 512, the second locking portion 515, and the third locking portion 516 can also be arranged on the press button 2351, and the first locking groove 221, the second locking groove 321, and the third locking groove 322 can be arranged on the first mating ring 2322 and the second mating ring 2332. The arrangement of the locking grooves and locking portions is not limited in this application, as long as the press button 2351 can selectively lock the first mating ring 2322 and the second mating ring 2332.

[0196] Furthermore, in another embodiment, the locking mechanism 235 may include a first tensioning member 2353. Both ends of the first tensioning member 2353 are connected to the push button 2351 and the frame 100, respectively. In this manner, when the frame 100 is folded, the push button 2351 is driven by the first tensioning member 2353 and moves in the direction F6 shown in FIG. 46, releasing the locking mechanism 235, and the first handle bar 232 and the second handle bar 233 are also folded together with the frame 100, i.e., switching to the state shown in FIG. 35, thereby reducing the overall volume of the child carrier.

[0197] Furthermore, the handlebar assembly 230 may further include a lighting assembly 600. As shown in FIG. 28 , the lighting assembly 600 is disposed between the fourth cover 238 and the second mating ring 2332. Specifically, the lighting assembly 600 includes a reflector 610, a light-emitting diode (LED) component 620, and a lamp holder 630. The lighting assembly 600 is convenient for use of the child carrier at night and also serves as a warning to other pedestrians and vehicles, improving safety.

[0198] The handlebar assembly 230 and child carrier have at least the following technical effects: In the child carrier, the at least two handlebars can be adjusted to different usable heights depending on the body shape of the seated child; In the child carrier, the usable heights of the at least two handlebars can be synchronously adjusted by a first synchronization mechanism 234 disposed between the at least two handlebars; The adjustment process is very convenient, making the child carrier easy to use and resulting in an excellent user experience.

[0199] In one embodiment, as shown in FIG. 48 , the child carrier further includes a backrest assembly 200. Specifically, the frame 100 further includes a connection base 250. The connection base 250 is detachably connected to the seat assembly 180 or the first connection frame 131. The backrest assembly 200 is rotatably connected to the connection base 250. In this embodiment, two connection bases 250 are provided. The two connection bases 250 are located on either side of the seat assembly 180. In other examples, only one connection base 250 or two or more connection bases 250 may be provided as long as the backrest assembly 200 can be fixed, and this application is not limited thereto. In other examples, the connection base 250 may be omitted. For example, the backrest assembly 200 may be detachably connected directly to the seat assembly 180 or the first connection frame 131. As shown in Figures 49 and 50, when the frame 100 is switched from the unfolded state to the folded state, the backrest assembly 200 folds accordingly, thereby reducing the overall volume of the child carrier in the folded state and making it easier for the user to carry, store, transport, etc.

[0200] 48 and 49, the child carrier further includes an armrest assembly 300. The armrest assembly 300 is detachably connected to the backrest assembly 200.

[0201] As shown in FIGS. 48 and 49 , the child carrier may further include a sunshade 510. In this embodiment, the sunshade 510 is rotatably connected to the backrest assembly 200. The sunshade 510 can be folded together with the backrest assembly 200, reducing the overall volume of the folded child carrier and facilitating carrying, storage, transportation, and the like for users. The sunshade 510 is detachably connected to the backrest assembly 200. Specifically, the sunshade 510 is detachably disposed on the top of the backrest assembly 200, allowing users to choose whether or not to dispose the sunshade 510 according to actual needs. In other embodiments, the sunshade 510 may be provided without the backrest assembly 200. In this case, the sunshade 510 is rotatably connected to the first connecting frame 131 or the seat assembly 180. 48 to 50 show an example of the sunshade 510, and FIG. 51 shows another example of the sunshade 510, but is not limited to these. The sunshade 510 can have other suitable configurations as long as it is capable of providing shade.

[0202] Unless otherwise defined, the terms "front" and "rear" used herein refer to the forward direction of the child carrier, i.e., the same direction as the forward direction of the child carrier, and "rear" refers to the opposite direction to the forward direction of the child carrier. The "detachable connections" between components described herein may also be configured as non-detachable connections in other embodiments according to actual needs. Furthermore, the number and mounting positions of the front wheels 30 and rear wheels 40 may also be appropriately adjusted according to needs.

[0203] The specific configurations of the backrest assembly 200 and armrest assembly 300 are described in more detail below with reference to Figures 52 through 77.

[0204] Specifically, as shown in FIGS. 52 and 53 , the backrest assembly 200 includes a backrest main body 210 and an attachment base 220, a connection base 250, and a fixed base 240, which are arranged on the left and right sides of the backrest main body 210. That is, the attachment base 220, the connection base 250, and the fixed base 240 are arranged on each side of the backrest main body 210, sequentially. The backrest main body 210 has a generally rectangular plate shape capable of supporting a child's back. In this embodiment, as shown in FIG. 54 , the backrest main body 210 includes a first backrest housing 213 and a second backrest housing 214 that can be fixed to each other. The first backrest housing 213 is located in front of the second backrest housing 214. The first backrest housing 213 and the second backrest housing 214 enclose a second attachment cavity (not shown). The second seat back housing 214 is provided with an unlocking opening 2121 that communicates with the second mounting cavity.

[0205] 55 and 56, the mounting base 220 has a substantially circular plate shape. Taking one side of the backrest main body 210 as an example, the connection base 250 includes a third housing 251 and a fourth housing 252 that can be fixed to each other. The third housing 251 is disposed below the same side of the mounting base 220. The mounting base 220 is rotatably connected to the fourth housing 252 via a first central shaft (not shown), i.e., the mounting base 220 is rotatable relative to the connection base 250. The fourth housing 252 has a first housing portion 2521 whose shape generally fits with the mounting base 220 and a second housing portion 2522 whose shape generally fits with the third housing 251. In this embodiment, the fourth housing 252 is integrally formed. 56, the mounting base 220 and the first housing portion 2521 enclose a fourth receiving cavity 261. The third housing 251 and the second housing portion 2522 enclose a fifth receiving cavity 262. The fourth receiving cavity 261 and the fifth receiving cavity 262 may or may not be in communication with each other. The fixed base 240, the fourth housing 252, and the mounting base 220 are all rotatably connected to each other via a first central shaft.

[0206] 54 , the child carrier in this embodiment further includes an adjustment mechanism 700. The adjustment mechanism 700 can adjust the tilt angle between the backrest main body 210 and the connection base 250, i.e., the tilt angle between the backrest assembly 200 and the seat assembly 180. The adjustment mechanism 700 facilitates folding of the backrest assembly 200 when the frame 100 is folded. Specifically, the adjustment mechanism 700 includes a second locking component 710 and an operating component 720.

[0207] 54 and 57 , the second locking component 710 has a locked state in which the relative rotation between the backrest assembly 200 and the seat assembly 180 is restricted, and an unlocked state in which the relative rotation between the backrest assembly 200 and the seat assembly 180 is not restricted. For example, in this embodiment, the second locking component 710 includes a plurality of restricting holes 711 and a restricting pin 712 that can be inserted into any of the restricting holes 711. The restricting holes 711 are disposed at an end of the first housing portion 2521 of the fourth housing 252 and are spaced apart along an arc. The openings of the restricting holes 711 all face the backrest main body 210 and are adapted to receive the restricting pin 712 disposed in the backrest main body 210.

[0208] Specifically, the limiting pin 712 is movably arranged on the backrest main body 210. The limiting pin 712 moves generally horizontally to approach the first housing portion 2521 of the fourth housing 252 and be inserted into one of the limiting holes 711, or move away from the first housing portion 2521 and be separated from one of the limiting holes 711. In this embodiment, the second locking components 710 are arranged on both sides of the backrest main body 210, which allows for smoother adjustment of the tilt angle of the backrest main body 210.

[0209] As shown in FIG. 54 , the operating component 720 can specifically include an unlocking component 721, a second tensioning component 722, and a seventh resetting component 723. In this embodiment, at least a portion of the second tensioning component 722, the seventh resetting component 723, and the unlocking component 721 are mounted in the second mounting cavity. The other portion of the unlocking component 721 extends outward from the second mounting cavity through the unlocking opening 2121 for operation. In this embodiment, the unlocking component 721 is an unlocking handle, and the second tensioning component 722 is a tensioning steel rope. In other embodiments, the unlocking component 721 may be an unlocking button, and the second tensioning component 722 may be a tensioning rope or a flexible band-like component. In this example, two second tensioning components 722 are provided. Both ends of each second tensioning component 722 are connected to the unlocking component 721 and the limiting pin 712 on one side of the second locking component 710, respectively. In this manner, when the unlocking member 721 is lifted up, the two second tensioning members 722 respectively pull the limiting pins 712 on both sides of the backrest main body 210 and move the limiting pins 712 away from the first housing portion 2521 (i.e., the limiting holes 711), thereby unlocking the second locking component 710. When the second locking component 710 is unlocked, the backrest assembly 200 becomes rotatable relative to the seat assembly 180, allowing the tilt angle of the backrest assembly 200 relative to the seat assembly 180 to be adjusted, and allowing the backrest assembly 200 to be folded when the frame 100 is folded.

[0210] 54, the seventh reset member 723 biases the second tension member 722 to move in a direction that drives the second lock component 710 to switch to the locked state. Specifically, a third pressing member 724 is connected between the two second tension members 722, and a fourth pressing member (not shown) is disposed on the surface of the first seatback housing 213 that faces the second mounting cavity. The fourth pressing member is located above the third pressing member 724. Both ends of the seventh reset member 723 abut against the third pressing member 724 and the fourth pressing member, respectively. In this way, when the external force lifting the unlocking member 721 is removed, the elastic force of the seventh resetting member 723 resets the second tensioning member 722 and the unlocking member 721, and the limiting pins 712 on both sides of the backrest main body 210 move in a direction approaching the first housing part 2521 (i.e., in a direction approaching the limiting holes 711) under the action of the second tensioning member 722. The limiting pins 712 are reinserted into the limiting holes 711, thereby realizing re-locking of the second locking component 710. In this embodiment, the seventh resetting member 723 is a spring.

[0211] It will be appreciated that in this embodiment, two limit holes 711 may be provided such that when the frame 100 is in the unfolded state, the limit pin 712 engages with one of the limit holes 711 to secure the back assembly 200 in the unfolded position relative to the seat assembly 180, as shown in FIG. 58. When the frame 100 switches from the unfolded state to the folded state (as shown in FIGS. 59 and 60), the limit pin 712 engages with another limit hole 711 to secure the back assembly 200 in the folded position relative to the seat assembly 180, as shown in FIG. 60. In other embodiments, more than two limit holes 711 may be provided, and when the frame 100 is in the unfolded state or semi-folded state, the limit pin 712 may engage with any limit hole 711 other than the two limit holes 711 to secure the back assembly 200 at a different tilt angle relative to the seat assembly 180.

[0212] Specifically, as shown in FIGS. 61 and 62 , armrest assembly 300 includes armrest body 310, first armrest rod 320, and second armrest rod 330. First armrest rod 320 and second armrest rod 330 are connected to either side of armrest body 310, respectively, to form a U-shaped structure. In this embodiment, armrest body 310, first armrest rod 320, and second armrest rod 330 are integrally formed. Furthermore, as shown in FIGS. 62 and 63 , the child carrier in this example further includes a first locking mechanism 8100. First locking mechanism 8100 is configured to enable detachable connection between armrest assembly 300 and backrest assembly 200. In this embodiment, two first locking mechanisms 8100 are provided to enable a detachable connection between the first armrest rod 320 on one side of the backrest body 210 and the backrest assembly 200, and a detachable connection between the second armrest rod 330 on the other side of the backrest body 210 and the backrest assembly 200.

[0213] The structure and connection relationship of the first locking mechanism 8100 will be described in detail below, taking one of the first locking mechanisms 8100 as an example.

[0214] As shown in FIG. 63 , the first locking mechanism 8100 includes a third locking member 8110, a third locking hole 8120, and a sixth reset member 8130. In this embodiment, the third locking member 8110 is a locking button. The third locking member 8110 and the first armrest rod 320 (or the second armrest rod 330) are pivotally connected to each other at a first pivot point M1. The third locking hole 8120 is disposed in the fixed base 240 of the backrest assembly 200. The third locking member 8110 has a first operating end 8111 and a first locking end 8112. The first pivot point M1 is disposed between the first operating end 8111 and the first locking end 8112. The first locking end 8112 is insertable into the third locking hole 8120. The first operating end 8111 is operable to separate the first locking end 8112 from the third locking hole 8120. The two ends of the sixth reset member 8130 abut against the first armrest rod 320 (or the second armrest rod 330) and the first operating end 8111, respectively. The sixth reset member 8130 urges the first locking end 8112 to rotate in a direction that engages with the third locking hole 8120. In this embodiment, the sixth reset member 8130 is a spring. In this manner, when it is necessary to remove the armrest assembly 300, the third locking member 8110 can be rotated in the direction F7 shown in FIG. 63 by simply pressing the first operating end 8111, thereby separating the first locking end 8112 from the third locking hole 8120 and releasing the first armrest rod 320 (or the second armrest rod 330) from the fixed base 240.

[0215] In this manner, when the first operating ends 8111 of the third locking members 8110 provided on the first armrest rod 320 and the second armrest rod 330 are pressed simultaneously, the first armrest rod 320 and the second armrest rod 330 are unlocked from the fixed base 240, and the armrest assembly 300 can be removed from the backrest assembly 200.

[0216] In yet another embodiment, as shown in FIG. 63, the engagement portion 241 may also be arranged on the surface of the fixed base 240 away from the fourth housing 252. The positioning groove 323 is provided on one end of the first armrest rod 320 away from the armrest main body 310 (see FIG. 61). The engagement portion 241 fits into the positioning groove 323 to position the armrest assembly 300 on the connection base 250, enabling the armrest assembly 300 to be connected to the connection base 250 with high precision. In this embodiment, the third lock hole 8120 is arranged in the engagement portion 241. In other embodiments, the third lock hole 8120 may not be arranged in the engagement portion 241.

[0217] Furthermore, as shown in FIGS. 64 to 66 , the child carrier according to this embodiment may further include a first positioning mechanism 9000. When the armrest assembly 300 is in the unfolded state, the first positioning mechanism 9000 may fix the armrest assembly 300 in a first position relative to the backrest assembly 200. When the armrest assembly 300 is in the folded state, the first positioning mechanism 9000 may fix the armrest assembly 300 in a second position relative to the backrest assembly 200. Unless otherwise specified, in this specification, the "unfolded state" refers to the fully unfolded state of the armrest assembly 300, and the "folded state" refers to the fully folded state of the armrest assembly 300. The armrest assembly 300 may also have an intermediate state between the unfolded state and the folded state. When the armrest assembly 300 is in the intermediate state, the armrest assembly 300 may be fixed in a third position relative to the backrest assembly 200.

[0218] 65 , the first positioning mechanism 9000 includes a first positioning portion, a second positioning portion, a third positioning portion, and a fifth reset member 9400. In this embodiment, the first positioning portion and the second positioning portion are a first positioning recess 9100 and a second positioning recess 9200 spaced apart on the backrest assembly 200. The third positioning portion is a first positioning protrusion 9300 movably disposed on the fixed base 240. In another embodiment, the fixed base 240 may be integrally formed with the first armrest rod 320 or the second armrest rod 330, and the third positioning portion may be movably disposed on the armrest assembly 300.

[0219] When the armrest assembly 300 is in the unfolded state, the first positioning protrusion 9300 may be inserted into the first positioning recess 9100, thereby fixing the armrest assembly 300 in a first position relative to the backrest assembly 200. When the armrest assembly 300 is in the folded state, the first positioning protrusion 9300 may be inserted into the second positioning recess 9200, thereby fixing the armrest assembly 300 in a second position relative to the backrest assembly 200.

[0220] 65 , the first positioning recess 9100 and the second positioning recess 9200 are hemispherical holes and are located on the side of the mounting base 220 facing the first housing part 2521 of the fourth housing 252. The first positioning recess 9100 and the second positioning recess 9200 are offset from the pivot shaft, i.e., the first central axis, of the fixed base 240.

[0221] As shown in FIG. 66 , a mounting boss 242 is disposed on the side of the fixed base 240 facing the connecting base 250. The mounting boss 242 is offset from the pivot shaft of the fixed base 240, i.e., offset from the first central axis. The mounting boss 242 is provided with an accommodation groove 2421. The opening of the accommodation groove 2421 faces the mounting base 220. The accommodation groove 2421 extends in a direction parallel to the rotation axis of the fixed base 240 and the mounting base 220, or in a direction parallel to the first central axis. In this embodiment, the first positioning protrusion 9300 is a ball and is movably disposed within the accommodation groove 2421. However, in other embodiments, the first positioning protrusion 9300 may be a pin having an arcuate surface or an inclined surface.

[0222] The first positioning protrusion 9300 has a locked position and an unlocked position. The first positioning protrusion 9300 is closer to the backrest main body 210 when in the locked position than when in the unlocked position. When the first positioning protrusion 9300 is in the locked position, the first positioning protrusion 9300 can be inserted into the first positioning recess 9100 or the second positioning recess 9200. When the first positioning protrusion 9300 is in the unlocked position, the first positioning protrusion 9300 is separated from the first positioning recess 9100 or the second positioning recess 9200. The fifth reset member 9400 is disposed in the accommodating groove 2421, and both ends of the fifth reset member 9400 abut against the bottom surface of the accommodating groove 2421 and the first positioning protrusion 9300, respectively. In this manner, the fifth reset member 9400 biases the first positioning protrusion 9300 to move in a direction toward the mounting base 220, i.e., toward the first positioning recess 9100 or the second positioning recess 9200. In this embodiment, the fifth reset member 9400 is a spring.

[0223] 65 , the fourth housing 252 is further provided with a mounting opening 2524 that communicates with the fourth accommodating cavity 261. The mounting opening 2524 is generally arc-shaped, and the mounting boss 242 can extend through the mounting opening 2524 into the fourth accommodating cavity 261. When the fixed base 240 rotates relative to the first housing part 2521, the mounting boss 242 moves along the arc-shaped mounting opening 2524, and the first positioning protrusion 9300 is inserted into the first positioning recess 9100 or the second positioning recess 9200, respectively.

[0224] 64 and 65 , when the frame 100 is in the unfolded state, the first positioning protrusion 9300 fits into the first positioning recess 9100, and the armrest assembly 300 is in the unfolded state relative to the frame 100 (or the backrest assembly 200). As shown in FIGS. 67 and 68 , a certain external force is applied to the armrest assembly 300. For example, the armrest main body 310 may be pushed in a direction approaching the backrest main body 210. In this case, the armrest assembly 300 drives the fixed base 240 to rotate relative to the fourth housing 252. Meanwhile, the fixed base 240 drives the first positioning protrusion 9300 to separate from the first positioning recess 9100 and move toward the second positioning recess 9200 in the direction F8 shown in FIG. 65 .

[0225] 66 and 68, when the first positioning protrusion 9300 moves in direction F8, the first positioning protrusion 9300 also moves in direction F9 shown in FIG. 66, switching from the locked position to the unlocked position. That is, the first positioning protrusion 9300 moves outward from the first positioning recess 9100 but still remains in contact with the surface of the mounting base 220, thereby compressing the fifth reset member 9400. When the first positioning protrusion 9300 moves together with the fixed base 240 into the second positioning recess 9200, the elastic force of the fifth reset member 9400 causes the first positioning protrusion 9300 to move in the direction opposite to direction F9, switching from the unlocked position to the locked position, and then inserting into the second positioning recess 9200. At this time, the armrest assembly 300 is locked in the folded state, as shown in FIG. 67. In this way, there is no need to first remove the armrest assembly 300 when folding the frame 100. The armrest assembly 300 can be folded close to the backrest body 210, thereby reducing the folded volume of the child carrier, making it convenient to store, and the structure is simple and easy to implement.

[0226] In this embodiment, the first positioning protrusion 9300 is implemented as a ball, and the first positioning recess 9100 and the second positioning recess 9200 are implemented as hemispherical grooves into which the ball can fit, allowing the ball to rotate smoothly within the hemispherical grooves. As a result, when the armrest assembly 300 rotates, the first positioning protrusion 9300 can smoothly rotate in and out of the first positioning recess 9100 or the second positioning recess 9200, making it easy to freely switch the first positioning protrusion 9300 between the locked position and the unlocked position. In this way, the armrest assembly 300 can easily rotate even when an external force is applied, while still achieving the positioning function of the first positioning mechanism 9000.

[0227] 65, the mounting opening 2524 includes a first edge 2525 and a second edge 2526. When the first positioning protrusion 9300 is inserted into the first positioning recess 9100, the mounting boss 242 abuts the first edge 2525. As shown in FIG. 68, when the first positioning protrusion 9300 is inserted into the second positioning recess 9200, the mounting boss 242 abuts the second edge 2526. In this manner, the rotation angle of the armrest assembly 300 can be limited by adjusting the position and size of the mounting opening 2524.

[0228] In another embodiment, the first positioning recess 9100 and the second positioning recess 9200 do not necessarily have to be hemispherical grooves, and may be partial hemispherical grooves into which a ball can be fitted. In another embodiment, at least one third positioning recess (not shown) into which the first positioning protrusion 9300 can be inserted may be disposed between the first positioning recess 9100 and the second positioning recess 9200, thereby allowing the armrest assembly 300 to be fixed at a plurality of inclination angles relative to the backrest assembly 200 according to actual needs. In another embodiment, the first positioning protrusion 9300 does not necessarily have to be a ball, and may be a pin-shaped structure or an ellipsoid-shaped structure. The shapes of the first positioning recess 9100 and the second positioning recess 9200 can be changed when the shape of the first positioning protrusion 9300 is changed, provided that the engagement between the first positioning protrusion 9300 and the first positioning recess 9100 and the engagement between the first positioning protrusion 9300 and the second positioning recess 9200 can be easily achieved, which is not limited to this application.

[0229] Furthermore, as shown in Fig. 69, the backrest assembly 200 for supporting the child's back and the armrest assembly 300 for protecting the child can be removed as needed. As shown in Fig. 70, when the child is able to ride in the child carrier by himself, the pusher assembly 900, which will be described later, can also be removed. The configuration of the pusher assembly 900 will be described in detail later.

[0230] In this embodiment, as shown in Figures 71 to 73, the child carrier further includes a second locking mechanism 8200. The backrest assembly 200 is detachably connected to the seat assembly 180 via the second locking mechanism 8200. In this embodiment, the second locking mechanisms 8200 are disposed on both the left and right sides of the backrest assembly 200, thereby allowing the backrest assembly 200 to be detachably connected to both the left and right sides of the seat assembly 180. The structure and connection relationship of the second locking mechanisms 8200 will be described in detail below, taking one of the second locking mechanisms 8200 as an example.

[0231] The second locking mechanism 8200 includes a first locking element disposed on the connecting base 250 and a second locking element disposed on the seat assembly 180. The first locking element is lockable or unlockable with the second locking element. In this embodiment, as shown in FIGS. 71 to 73 , the first locking element is a fourth locking member 8210 movably disposed on the connecting base 250, and the second locking element is a fourth locking hole 8220 disposed on one side of the seat assembly 180. The fourth locking member 8210 can be locked to or unlocked from the fourth locking hole 8220.

[0232] As shown in FIG. 73 , the fourth locking member 8210 is a lock button, and the fourth locking member 8210 and the connection base 250 are pivotally connected to each other at a second pivot point N1. The fourth locking member 8210 can rotate about the second pivot point N1 relative to the third housing 251 or the fourth housing 252. In this embodiment, a first pivot base 2512 and a second pivot base 2513 located approximately in the center of the fifth accommodating cavity 262 are disposed between the third housing 251 and the fourth housing 252. The fourth locking member 8210 is rotatably disposed on a pivot pin 8230. The first pivot base 2512 and the second pivot base 2513 can be disposed in either the third housing 251 or the fourth housing 252 as long as the fourth locking member 8210 is rotatable. Both ends of the pivot pin 8230 are fixed to a first pivot base 2512 (see FIG. 68) and a second pivot base 2513, respectively. The fourth locking member 8210 includes a second operating end 8211 and a second locking end 8212. A second pivot point N1 is disposed between the second operating end 8211 and the second locking end 8212.

[0233] 74 and 75 , the second operating end 8211 at least partially protrudes from the fifth accommodating cavity 262 through the second operating hole 2523 on the fourth housing 252. That is, the second operating end 8211 at least partially protrudes from a surface (e.g., an outer surface) of the fourth housing 252 away from the fifth accommodating cavity 262 through the second operating hole 2523, allowing a user to press the second operating end 8211. The fourth housing 252 is further provided with a through-hole 2511. The second locking end 8212 is inserted through the through-hole 2511 into the fourth locking hole 8220 to engage the connecting base 250 with the seat assembly 180, i.e., to secure the backrest assembly 200 with the armrest assembly 300 and the backrest assembly 200 with the seat assembly 180 (i.e., the frame 100).

[0234] 75 , the second locking mechanism 8200 further includes an eighth resetting member 8240. The eighth resetting member 8240 is disposed between the second operating end 8211 and the third housing 251. The eighth resetting member 8240 biases the second operating end 8211 to move in a direction that locks the second locking end 8212 and causes it to fit into the fourth locking hole 8220.

[0235] 76 and 77, a guide boss 181 is further disposed on one side of the seat assembly 180. Referring to FIGS. 70 and 71, a guide hole 1811 is disposed in the guide boss 181. A guide groove 2527 is provided in the connection base 250. The guide boss 181 can be inserted into and fitted into the guide groove 2527. Specifically, referring to FIG. 72, the guide groove 2527 is disposed on the side of the second housing part 2522 facing the seat assembly 180. The third housing 251 covers only a portion of the second housing part 2522 and does not cover the guide groove 2527. A guide rib 2528 is disposed at the bottom of the guide groove 2527. In this embodiment, one guide rib 2528 is provided. In other embodiments, multiple guide ribs 2528 may be provided. An insertion opening 2529 is disposed in the side wall of the guide groove 2527. In this embodiment, the insertion opening 2529 is located at the base of the guide groove 2527. In other embodiments, the guide boss 181 may be located in the connection base 250 and the guide groove 2527 may be located in the seat assembly 180, but is not limited to these.

[0236] In this manner, when the backrest assembly 200 needs to be attached to the seat assembly 180, the connection base 250 is inserted from top to bottom from the side of the seat assembly 180. In this manner, the guide boss 181 is inserted into the guide groove 2527 through the insertion opening 2529. At this time, the guide rib 2528 is positioned in the guide hole 1811, thereby enabling the backrest assembly 200 to be attached to the seat assembly 180 more accurately. Furthermore, the second lock end 8212 of the fourth lock member 8210 is inserted into the fourth lock hole 8220, and the backrest assembly 200 is locked and fixed to the seat assembly 180 via the second lock mechanism 8200. When it is necessary to remove the backrest assembly 200 from the seat assembly 180, simply by pressing the second operating end 8211 of the fourth locking member 8210, the second operating end 8211 is rotated about the second pivot point N1, the second locking end 8212 is moved away from the seat assembly 180, and the second locking end 8212 is disengaged from the fourth locking hole 8220, thereby unlocking the second locking mechanism 8200. At this time, by pulling the backrest assembly 200 upward, the guide boss 181 passes through the insertion opening 2529 and disengages from the guide groove 2527, and the backrest assembly 200 can be removed.

[0237] A child carrier including the armrest assembly 300 has at least the following technical effects.

[0238] In a child carrier including the armrest assembly 300 described above, when the frame 100 is in an unfolded state, the armrest assembly 300 can be fixed at a first position relative to the frame 100 via the first positioning mechanism 9000. When the frame 100 is in a folded state, the armrest assembly 300 can be fixed at a second position relative to the frame 100 via the first positioning mechanism 9000. In this way, by appropriately setting the first and second positions, the armrest assembly 300 can be unfolded and used when the frame 100 is unfolded, and can be folded when the frame 100 is folded. This reduces the overall volume of the child carrier, making it easy to use and simple in structure. Furthermore, since there is no need to first remove the armrest assembly 300 when folding the entire frame 100, operation is simple.

[0239] 51 and 78 , the child carrier further includes a first connection mechanism 800 and a pusher assembly 900. The pusher assembly 900 is removably disposed on the frame 100 and is located behind the backrest assembly 200. A pushing rod mounting base 170 is disposed on the rotation base 134 of the frame 100. The pushing rod assembly 900 is removably connected to the pushing rod mounting base 170 via the first connection mechanism 800. When the pushing hand assembly 900 is connected to the frame 100, the pushing hand assembly 900 does not interfere with the rotation of the drive handle 152. That is, even if the pushing hand assembly 900 is not detached, the rotation of the drive handle 152 is not affected by the pushing hand assembly 900.

[0240] As shown in FIGS. 79 to 82 , the first connection mechanism 800 includes a first locking member 810, a first driving member 820, a first operating member 830, and a third reset member 840. The first locking member 810 is connected to the first operating member 830 via the first driving member 820. The first locking member 810 is movably connected to the pusher assembly 900. Specifically, in this embodiment, the pusher assembly 900 is provided with a second receiving cavity 911. The second receiving cavity 911 extends substantially parallel to the extension direction of the pusher assembly 900. A first through-hole 913 is provided in a side wall of the second receiving cavity 911. The first locking member 810 is disposed within the second receiving cavity 911 and is rotatably connected to the pusher assembly 900. In another embodiment, the first locking member 810 may not be pivotally connected to the pusher hand assembly 900. The first locking member 810 has a first locked position and a first unlocked position. When the first locking member 810 is in the first locked position, the first locking member 810 engages with the push rod mounting base 170. When the first locking member 810 is in the first unlocked position, the first locking member 810 is disengaged from the push rod mounting base 170. Specifically, the first locking member 810 is provided with a first locking protrusion 811, and the push rod mounting base 170 is provided with a first mounting groove 171. A first locking hole 172 is provided in the groove wall of the first mounting groove 171. When the first locking member 810 is in the first locked position, the first locking protrusion 811 passes through the first through-hole 913 and engages with the first locking hole 172. When the first locking member 810 is moved or rotated to the first unlocked position, the first locking protrusion 811 comes out of the first locking hole 172 and disengages from the first locking hole 172 .

[0241] Continuing to refer to FIGS. 82 and 83 , the first drive member 820 is movably disposed in the second receiving cavity 911. The first drive groove 821 is disposed at one end of the first drive member 820. The extension direction of the first drive groove 821 intersects with, but is not perpendicular to, the movement direction of the first operating member 830. The first locking member 810 includes a first drive pin 812. The first drive pin 812 is inserted into the first drive groove 821 and is movable along the first drive groove 821. The other end of the first drive member 820, remote from the first drive groove, is connected to the first operating member 830. When the first operating member 830 moves in the extension direction of the pusher assembly 900, the first operating member 830 moves the first driving member 820 in the same direction, causing the first driving pin 812 to move along the first driving groove 821, thereby rotating the first locking member 810 and switching the first locking member 810 between the first locked position and the first unlocked position. In other embodiments, the first driving member 820 can be omitted. For example, the first locking member 810 can be directly connected to the first operating member 830, and the first locking member 810 can be switched between the first locked position and the first unlocked position by pressing or pushing the first operating member 830.

[0242] Referring to FIG. 82 , the first operating member 830 is movably disposed on the pusher assembly 900 and can move in the extension direction of the pusher assembly 900. Specifically, in this embodiment, the first operating member 830 at least partially protrudes from the outer circumferential surface of the pusher assembly 900 to facilitate user operation. In other embodiments, the first operating member 830 may be configured not to protrude from the outer circumferential surface of the pusher assembly 900. For example, the first operating member 830 may be disposed in the second receiving cavity 911 of the pusher assembly 900. The pusher assembly 900 is provided with an operating opening (not shown) that communicates with the second receiving cavity 911. A user can insert a finger into the second receiving cavity 911 through the operating opening and push or pull the first operating member 830. In short, the first operating member 830 can have any configuration necessary as long as it is operable. The third reset portion 840 can be an elastic member such as a spring or an elastic piece. In this embodiment, the third reset member 840 is a spring. The third reset member 840 is disposed in the second receiving cavity 911. A first end of the third reset member 840 abuts the pusher hand assembly 900, and a second end of the third reset member 840 abuts the first locking member 810. The third reset member 840 biases the first locking member 810 to move toward the first lock position. Specifically, the pusher hand assembly 900 further includes an abutment member 960. A first end of the third reset member abuts the abutment member 960. The first locking member 810 has a second groove 813 to prevent the third reset member 840 from shifting from the first locking member 810 when a force is applied. The third reset member 840 is at least partially disposed within the second groove 813 , and a second end of the third reset member 840 abuts against the bottom of the second groove 813 .

[0243] The process for removing the pusher assembly 900 is described in detail below.

[0244] 82 and 83 , when it is necessary to remove the pusher hand assembly 900 from the frame 100, the first operating member 830 moves in direction D3, which causes the first driving member 820 to move in direction D3. At the same time, the first driving member 820 drives the first locking member 810 to rotate in rotation direction D5 through cooperation between the first driving groove 821 and the first driving pin 812. The third reset member 840 is compressed, and the first locking protrusion 811 of the first locking member 810 retracts from the first locking hole 172. The first connecting mechanism 800 is unlocked, and the pusher hand assembly 900 can be removed from the first mounting groove 171.

[0245] Conversely, when it is necessary to reattach the pusher assembly 900 to the frame 100, the end of the pusher assembly 900 connected to the first locking member 810 is inserted into the first mounting groove 171. When the first locking member 810 moves toward the first locking hole 172, the elastic force of the third reset member 840 causes the first locking protrusion 811 to re-engage with the first locking hole 172, and the pusher assembly 900 is reattached to the frame 100.

[0246] As shown in FIG. 79 , the pusher hand assembly 900 includes a first connecting rod 910, a second connecting rod 920, and a length adjustment mechanism 930. The second connecting rod 920 is at least partially inserted into the first connecting rod 910 and is movable relative to the first connecting rod 910 in the extension direction. The length adjustment mechanism 930 has a locked state and an unlocked state. When the length adjustment mechanism 930 is in the unlocked state, the second connecting rod 920 moves relative to the first connecting rod 910, extending or retracting the pusher hand assembly 900. When the length adjustment mechanism 930 is in the locked state, the second connecting rod 920 and the first connecting rod 910 are fixed to each other, i.e., the length of the pusher hand assembly 900 is fixed.

[0247] 82, the first connecting rod 910 is inserted into the first mounting groove 171 of the push rod mounting base 170. At least one end of the first connecting rod 910 is hollow. In this embodiment, the entire first connecting rod 910 is a hollow rod, and the second receiving cavity 911 is formed inside the first connecting rod 910 and extends through both ends thereof.

[0248] Furthermore, the pusher assembly 900 may further include a lock mounting base 940. The lock mounting base 940 is disposed on one end of the first connecting rod 910, with at least a portion of the lock mounting base 940 extending into the second receiving cavity 911. The first lock member 810 is pivotally connected to the lock mounting base 940. Referring to FIGS. 79 to 81, another end of the first connecting rod 910 is connected to a second connecting rod 920. Specifically, one end of the second connecting rod 920 is inserted into the second receiving cavity 911, and the other end of the second connecting rod 920 includes a push handle 950. Furthermore, referring to FIG. 84, the second connecting rod 920 is provided with a third receiving cavity 921 extending substantially parallel to the extension direction of the second connecting rod 920. The second connecting rod 920 is provided with a second through hole 922. A second through-hole 922 penetrates the sidewall of the third receiving cavity 921 .

[0249] Specifically, as shown in FIGS. 84 and 85 , the length adjustment mechanism 930 includes a second locking member 931, a second driving member 932, a second operating member 933, a fourth reset member 934, and a guide base 935. The second locking member 931 is connected to the second operating member 933 via the second driving member 932. The second locking member 931 includes a second movable connecting portion 9311 and a second locking portion 9312. The second movable connecting portion 9311 is disposed in the third receiving cavity 921 and is movably connected to the second driving member 932. The first connecting rod 910 is provided with at least two second locking holes 912. The second locking member 931 has a second locked position and a second unlocked position. When the second locking member 931 is in the second locking position, the second locking portion 9312 extends through the second through-hole 922 and engages with one of the second locking holes 912. When the second locking portion 9312 is in the second unlocking position, the second locking member 931 is released from the second locking hole 912. In this embodiment, the second locking member 931 is integrally formed. In other embodiments, the second locking member 931 may be formed by connecting the second movable connecting portion 9311 and the second locking portion 9312, which are independent of each other, by welding, soldering, or the like.

[0250] Specifically, as shown in FIGS. 84 and 85 , the second drive member 932 includes an operational connection portion 9321 and a drive connection portion 9322. The operational connection portion 9321 is movably connected to the second movement member 933. Specifically, a second drive groove 9323 is provided on one of the operational connection portion 9321 and the second movement member 933, and a second drive pin 9331 is provided on the other of the operational connection portion 9321 and the second movement member 933. The extension direction D2 of the second drive groove 9323 intersects with but is not perpendicular to the movement direction D1 of the second movement member 933. The extension direction D2 of the second drive groove 9323 intersects with but is not perpendicular to the movement direction D3 of the second drive member 932. The second drive pin 9331 is inserted into the second drive groove 9323 and is movable along the second drive groove 9323.

[0251] As shown in FIGS. 86 and 87 , the drive connection portion 9322 is movably connected to the second movable connection portion 9311 of the second locking member 931. One of the drive connection portion 9322 and the second locking portion 931 has a third drive groove 9324, and the other of the drive connection portion 9322 and the second locking portion 931 has a third drive pin 9313. The extension direction D4 of the third drive groove 9324 intersects with but is not perpendicular to the movement direction D1 of the second operating member 933. The extension direction D4 of the third drive groove 9324 intersects with but is not perpendicular to the movement direction D3 of the second driving member 932. The third drive pin 9313 is inserted into the third drive groove 9324 and is movable along the third drive groove 9324. In this embodiment, the extension direction D2 of the second driving groove 9323 and the extension direction D4 of the third driving groove 9324 are parallel to each other and point in the same direction. In other embodiments, the extension direction D2 of the second driving groove 9323 and the extension direction D4 of the third driving groove 9324 may not be parallel to each other but may be two different directions.

[0252] Specifically, in this embodiment, the operational connection portion 9321 is provided with a second driving groove 9323, the second operating member 933 is provided with a second driving pin 9331, the driving connection portion 9322 is provided with a third driving groove 9324, and the second locking member 931 is provided with a third driving pin 9313. The second locking member 931 driven by the second driving groove 9323 and the third driving groove 9324 can move in a direction substantially parallel to the movement direction of the second operating member 933, or can move in a direction at any angle relative to the movement direction of the second operating member 933. That is, the movement direction of the second locking member 931 is not limited by the movement direction and attachment position of the second operating member 933. By adjusting the extension directions of the second driving groove 9323 and the third driving groove 9324, the second operating member 933 can move the second locking member 931 in a predetermined direction, thereby allowing the second operating member 933 to be positioned in a more suitable position for user use.

[0253] 84 and 87 to 89, the guide base 935 is disposed within the third receiving cavity 921. The guide base 935 includes a first receiving groove 9351, a second receiving groove 9352, and an elongated hole 9353 extending through the first receiving groove 9351 and the second receiving groove 9352. The extension directions of the first receiving groove 9351 and the second receiving groove 9352 intersect with the extension direction of the second receiving groove 9352. For example, the extension directions of the second receiving groove 9352 and the first receiving groove 9351 are parallel to each other and are both parallel to direction D1. The extension direction of the second receiving groove 9352 is direction D3, which is perpendicular to the extension directions of the first receiving groove 9351 and the elongated hole 9353. The second locking member 931 is movably disposed within the first receiving groove 9351 and is movable along the first receiving groove 9351. The second locking member 931 is restricted to move in a predetermined direction D1 via the first receiving groove 9351. The second driving member 932 is movably disposed within the second receiving groove 9352 and is movable along the second receiving groove 9352. The second driving member 932 is restricted to move in a predetermined direction D3 via the second receiving groove 9352. In this embodiment, referring to FIGS. 88 and 89 , the first receiving groove 9351 extends laterally through the guide base 935. The second receiving groove 9352 is disposed on the outer circumferential surface of the guide base 935. The elongated hole 9353 extends through the outer circumferential surface of the guide base 935 and is in communication with the first receiving groove 9351 and the second receiving groove 9352. The third drive pin 9313 extends through the elongated hole 9353 and connects the second locking member 931 and the second drive member 932. In another embodiment, the first receiving groove 9351 and the second receiving groove 9352 may be located on opposite sides of the guide base 935, respectively.

[0254] As shown in FIG. 84 , the fourth reset member 934 is disposed between the second drive member 932 and the guide base 935. The fourth reset member 934 biases the second drive member 932 in a direction that moves the second lock member 931 to the second lock position, i.e., in a direction opposite to direction D3. The fourth reset member 934 may be an elastic member such as a spring or an elastic piece. In this embodiment, the fourth reset member 934 is a spring. Specifically, the guide base 935 is provided with a third receiving groove 9354. The second drive member 932 includes an abutting portion 9325. At least a portion of the abutting portion 9325 extends into the third receiving groove 9354. One end of the fourth reset member 934 abuts against the abutting portion 9325, and the other end of the fourth reset member 934 abuts against the groove wall of the third receiving groove 9354.

[0255] The length adjustment process of the pusher assembly 900 in this embodiment will be described in detail below.

[0256] As shown in FIG. 85 , when the length of the pusher assembly 900 needs to be adjusted, the second operating member 933 is pushed in direction D1. The second operating member 933 moves the second driving member 932 in direction D3 through cooperation between the second driving groove 9323 and the second driving pin 9331, and the fourth reset member 934 is compressed. As shown in FIGS. 86 and 87 , the second driving member 932 drives the second locking member 931 to move in direction D1 through cooperation between the third driving groove 9324 and the third driving pin 9313. When the second locking member 931 moves to the second locking portion 9312 and disengages from a certain second locking hole 912, the length adjustment mechanism 930 is unlocked and the second connecting rod 920 becomes movable relative to the first connecting rod 910. In this case, the second connecting rod 920 moves relative to the first connecting rod 910 to adjust the overall length of the pusher assembly 900 .

[0257] When the second connecting rod 920 needs to move to face another second locking hole 912, the pressing force on the second operating member 933 is removed, and the elastic force of the fourth resetting member 934 causes the second driving member 932 to move in the direction opposite to direction D3. At the same time, the second driving member 932, in cooperation with the third driving groove 9324 and the third driving pin 9313, moves the second locking member 931 in the direction opposite to direction D1, reinserting the second locking portion 9312 into the other second locking hole 912 and re-locking the second connecting rod 920 and the first connecting rod 910. At the same time, the second driving member 932, in cooperation with the second driving groove 9323 and the second driving pin 9331, drives the second operating member 933 to move in the direction opposite to direction D1 to reset.

[0258] In one embodiment, as shown in FIG. 90 , the child transport device further includes a footrest device 2000 and a pedal device 3000. The front wheel 30 and rear wheel 40 described above can form the wheel assembly 20. In this manner, the seat assembly 180 is disposed approximately in the center of the frame 100. The footrest device 2000 is connected to the frame 100, disposed below the frame 100, and disposed between the wheel assembly 20 and the seat assembly 180. The footrest device 2000 has an in-use state (as shown in FIG. 90 ) and an in-use state (as shown in FIG. 91 ) relative to the frame 100. While the child transport device is moving, the footrest device 2000 can maintain the in-use state relative to the frame 100. In this case, the footrest device 2000 can be configured to support a child's feet. By placing both feet on the footrest device 2000, the child can get a sufficient rest and reduce fatigue from having their feet suspended in the air for a long period of time or from riding for a long period of time. Furthermore, in this embodiment, the pedal device 3000 is drivingly connected to the front wheel 30, and by stepping on the pedal component 3100, the front wheel 30 is rotated, causing the entire child transport device to move forward.

[0259] Specifically, the footrest device 2000 can be in various forms. For example, in a first embodiment, as shown in Figures 92 and 93, the footrest device 2000 includes a footrest component 2300, a support member 2100, and a connecting member 2200. When the footrest device 2000 is in a use state, the support member 2100 is in a first rotation position, and the footrest component 2300 is in an unfolded state. When the footrest device 2000 is not in a use state, the support member 2100 is in a second rotation position, and the footrest component 2300 is in a folded state.

[0260] In this example, the footrest component 2300 includes a first footrest 2310 and a second footrest 2320. The first footrest 2310 and the second footrest 2320 are pivotally connected to one end of the support member 2100 through a third pivot shaft 2410 and a fourth pivot shaft 2420. The other end of the support member 2100 is pivotally connected to the connecting member 2200 through a rotation shaft 243. The end of the connecting member 2200 remote from the support member 2100 is fixed to the frame 100.

[0261] Specifically, as shown in FIGS. 94 to 96 , the support member 2100 includes a support body 2160. The support body 2160 has a substantially rectangular structure. The rectangular structure has a first end surface 2110 and a second end surface 2120 at opposite ends. Two third connecting portions 2130 and two fourth connecting portions 2140 protrude from the first end surface 2110. A first footrest 2310 is rotatably connected to the third connecting portion 2130 via a third pivot shaft 2410, and a second footrest 2320 is rotatably connected to the fourth connecting portion 2140 via a fourth pivot shaft 2420. The first footrest 2310 and the second footrest 2320 have an unfolded state and a folded state relative to the support member 2100. As shown in Fig. 94, when the first footrest 2310 or the second footrest 2320 is in the unfolded state, the first footrest 2310 or the second footrest 2320 can be configured to support a child's feet. As shown in Fig. 95, when the first footrest 2310 or the second footrest 2320 is in the folded state, the first footrest 2310 or the second footrest 2320 moves toward the support member 2100 and is folded.

[0262] 94 and 95, the footrest device 2000 further includes a fixing part 2500. In this embodiment, the fixing part 2500 is disposed between the first footrest 2310 and the support member 2100 and between the second footrest 2320 and the support member 2100. When the first footrest 2310 (or the second footrest 2320) is in a folded state, the first footrest 2310 (or the second footrest 2320) can be fixed to the corresponding side of the support member 2100 via the fixing part 2500.

[0263] A fixing part 2500 disposed between the first footrest 2310 and the support member 2100 will be described as an example. As shown in FIGS. 94, 97, and 98, the fixing part 2500 includes a first magnetic member 2510 disposed on the first footrest 2310 and a second magnetic member 2520 disposed on the support member 2100. When the first footrest 2310 is in a folded state, the first magnetic member 2510 and the second magnetic member 2520 can attract each other. In this example, the first magnetic member 2510 can be a permanent magnet embedded in the first footrest 2310. The second magnetic member 2520 can be integrally formed with the rotating shaft 243. Specifically, the rotating shaft 243 can be made of a magnetic material such as iron, cobalt, or nickel. Both ends of the rotating shaft 243 protrude from both sides of the support member 2100 to form two second magnetic members 2520. 98, when the first footrest 2310 and the second footrest 2320 are in the folded state, the first magnetic members 2510 of the first footrest 2310 and the second footrest 2320 attract the two magnetic members 2520, respectively, thereby fixing the first footrest 2310 and the second footrest 2320 in the folded state. As shown in FIG. 97, when it is necessary to switch the first footrest 2310 (or the second footrest 2320) from the folded state to the unfolded state, the magnetic attraction between the first magnetic member 2510 and the second magnetic member 2520 can be overcome by simply applying a certain force to the first footrest 2310 (or the second footrest 2320). Therefore, the rotating shaft 243 is not only rotatably connected to the support member 2100 and the connecting member 2200, but can also attract and fix the first footrest 2310 and the second footrest 2320 without providing an additional second magnetic member 2520. This simplifies the installation process of the footrest device 2000. In another example, the second magnetic member 2520 may be a component that is additionally provided on the support member 2100 and has polarity or magnetic properties opposite to those of the first magnetic member 2510.

[0264] Furthermore, as shown in FIGS. 97 and 98 , a second synchronization mechanism 2600 is disposed between the first footrest 2310 and the second footrest 2320. The second synchronization mechanism 2600 enables the first footrest 2310 and the second footrest 2320 to rotate synchronously. In this example, the second synchronization mechanism 2600 includes a third drive member 2610 and a fourth drive member 2620. Specifically, one end of the first footrest 2310 and the third drive member 2610 are rotatably connected to the third connection portion 2130 via a third pivot shaft 2410. Both one end of the first footrest 2310 and the third drive member 2610 are fixed to the third pivot shaft 2410. As shown in FIG. 94 , the third pivot shaft 2410 is rotatably connected to the third connection portion 2130. Similarly, one end of the second footrest 2320 and the fourth drive member 2620 are rotatably connected to the fourth connecting portion 2140 via a fourth pivot shaft 2420. Both one end of the second footrest 2320 and the fourth drive member 2620 are fixed to the fourth pivot shaft 2420. As shown in FIG. 94 , the fourth pivot shaft 2420 is rotatably connected to the fourth connecting portion 2140.

[0265] 97 and 98 , in this example, the third drive member 2610 includes a first gear toothing 2610a, and the fourth drive member 2620 includes a second gear toothing 2620a. The first gear toothing 2610a and the second gear toothing 2620a mesh with each other. In this manner, when one of the first footrest 2310 and the second footrest 2320 (e.g., the first footrest 2310) rotates relative to the support member 2100, the first gear toothing 2610a meshes with the second gear toothing 2620a, causing the other of the first footrest 2310 and the second footrest 2320 (e.g., the second footrest 2320) to rotate synchronously, thereby facilitating a user to simultaneously deploy or fold the first footrest 2310 and the second footrest 2320. That is, by being driven by the third driving member 2610 and the fourth driving member 2620, the first footrest 2310 and the second footrest 2320 can be rotated in opposite directions in synchronization with each other.

[0266] In this example, the third drive member 2610 and the fourth drive member 2620 are both 1 / 4 gears. In this way, the rotation angle of the first footrest 2310 and the second footrest 2320 relative to the support member 2100 can be limited, and the first footrest 2310 and the second footrest 2320 can always rotate between the unfolded state and the folded state. In other examples, the third drive member 2610 and the fourth drive member 2620 may be 1 / 3 gears, 1 / 5 gears, etc., as needed, and this application is not limited thereto.

[0267] In another example, the third drive member 2610 and the fourth drive member 2620 may be directly fixed to one end of the first footrest 2310 and one end of the second footrest 2320, respectively. In this manner, the third pivot shaft 2410 is rotatably connected to one end of the first footrest 2310 and fixedly connected to the third connector 2130. The fourth pivot shaft 2420 is rotatably connected to one end of the second footrest 2320 and fixedly connected to the fourth connector 2140.

[0268] 94 to 96, the connecting member 2200 includes a fixed portion 2210 and a second pivot portion 222 connected thereto. The fixed portion 2210 has a substantially U-shaped structure. As shown in FIG. 93, both ends of the fixed portion 2210 are fixedly connected to both sides of the frame 100 via fasteners 280. The fasteners 280 can be rivets, screws, or the like. The second pivot portion 222 has a substantially cylindrical structure and is rotatably connected to the support member 2100 via a rotation shaft 243.

[0269] Specifically, as shown in FIGS. 97 to 99 , two first pivot portions 2150 extend from opposite sides of the second end surface 2120 of the support 2160. Each of the two first pivot portions 2150 has a pivot hole 215a. The rotation shaft 243 passes through the pivot hole 215a on one side, the second pivot portion 222, and the pivot hole 215a on the other side in this order, thereby enabling a pivot connection between the support member 2100 and the connecting member 2200. In this example, the rotation shaft 243 is fixedly connected to the two first pivot portions 2150, and the second pivot portion 222 is rotatable about the rotation shaft 243. In another example, the rotation shaft 243 may be fixedly connected to the second pivot portion 222, and the two first pivot portions 2150 may be rotatable about the rotation shaft 243. In this example, the third pivot shaft 2410 and the fourth pivot shaft 2420 are both perpendicular to the rotation axis 243. In another example, the angle between the third pivot shaft 2410 and the rotation axis 243 and the angle between the fourth pivot shaft 2420 and the rotation axis 243 may be greater than or less than 90 degrees. In other words, the extension directions of the third pivot shaft 2410 (or the fourth pivot shaft 2420) and the rotation axis 243 are not parallel to each other.

[0270] 97 to 99, the footrest device 2000 further includes a second positioning mechanism 270. The second positioning mechanism 270 is disposed between the support member 2100 and the connecting member 2200. The second positioning mechanism 270 is used to fix the support member 2100 relative to the connecting member 2200 in the first rotation position shown in FIG. 106 or the second rotation position shown in FIG. 107. In this example, two second positioning mechanisms 270 are provided, each configured to achieve positioning and fixation between either side of the second pivot portion 222 and the two first pivot portions 2150, respectively. This allows the support member 2100 to be more appropriately positioned relative to the connecting member 2200 and to prevent it from easily shifting. In another example, the second positioning mechanism 270 may be disposed only between one side of the second pivot portion 222 and the corresponding first pivot portion 2150.

[0271] Specifically, as shown in FIGS. 97 to 99, one of the second positioning mechanisms 270 will be described as an example. The second positioning mechanism 270 includes a third positioning recess 271, a fourth positioning recess 272, a second positioning protrusion 273, and a positioning reset member 274. The third positioning recess 271 and the fourth positioning recess 272 are spaced apart from each other on the first side surface 215b of the first pivot portion 2150. The third positioning recess 271 and the fourth positioning recess 272 are spaced apart from each other along the circumferential direction of the pivot hole 215a. The second positioning protrusion 273 is movably disposed on the second pivot portion 222. The second positioning protrusion 273 is movable so as to protrude from the second side surface 222b of the second pivot portion 222. The first side surface 215b abuts against the second side surface 222b. As shown in FIG. 98 , the second positioning protrusion 273 is movably disposed within the second pivot portion 222 and is spaced from the rotation axis 243. In this example, the second positioning protrusion 273 is movable in a direction substantially parallel to the rotation axis 243. The second positioning protrusion 273 has a first movement position and a second movement position. A symmetry plane is present between the two first pivot portions 2150, and the two first pivot portions 2150 are mirror images of each other with respect to the symmetry plane. The second positioning protrusion 273 is located farther from the symmetry plane when in the first movement position than when in the second movement position. When the second positioning protrusion 273 is in the first movement position, the second positioning protrusion 273 can be fitted into the third positioning recess 271 or the fourth positioning recess 272. When the second positioning protrusion 273 is in the second movement position, the second positioning protrusion 273 disengages from the third positioning recess 271 or the fourth positioning recess 272 and abuts against the first side surface 215b. In this example, the second positioning protrusion 273 is a ball, and the third positioning recess 271 and the fourth positioning recess 272 are first and second positioning grooves, respectively, into which the second positioning protrusion 273 can be fitted. In this example, the first and second positioning grooves are both partially spherical grooves.Utilizing the smooth rotational characteristics of the ball, the ball can move smoothly between the first positioning groove and the second positioning groove when the support member 2100 rotates around the connecting member 2200. In other examples, the second positioning protrusion 273 may have a pin-shaped structure or a tapered structure.

[0272] 97 to 99, the positioning reset member 274 is disposed between the second positioning protrusion 273 and the support member 2100. The positioning reset member 274 biases the second positioning protrusion 273 to move toward the first movement position. Specifically, a second mounting groove 222a extending in a direction parallel to the rotation shaft 243 can be provided in the second pivot portion 222. The positioning reset member 274 and at least a portion of the second positioning protrusion 273 are disposed in the second mounting groove 222a. Both ends of the positioning reset member 274 abut against the bottom surface of the second mounting groove 222a and the second positioning protrusion 273, respectively. When the support member 2100 is rotated to the first rotational position or the second rotational position relative to the connecting member 2200, the positioning reset member 274 causes at least a portion of the second positioning protrusion 273 to pass through the opening of the second mounting groove 222a and be pushed out of the second mounting groove 222a to engage with the third positioning recess 271 or the fourth positioning recess 272, thereby fixing the support member 2100 in the first rotational position or the second rotational position relative to the connecting member 2200. The positioning reset member 274 is optionally a spring.

[0273] In other examples, the second positioning mechanism 270 may have other configurations. For example, the fourth and fifth positioning portions may be disposed on the connecting member 2200, and the sixth positioning portion may be disposed on the support member 2100, with the fourth and fifth positioning portions having magnetic properties opposite to those of the sixth positioning portion. In this manner, when the support member 2100 is in the first rotation position, the sixth and fourth positioning portions are magnetically locked, and when the support member 2100 is in the second rotation position, the sixth and fifth positioning portions are magnetically locked. In short, the second positioning mechanism 270 may have various configurations as long as positioning between the support member 2100 and the connecting member 2200 can be achieved, and is not limited thereto. Furthermore, the fourth and fifth positioning portions may be disposed on the support member 2100, and the sixth positioning portion may be disposed on the connecting member 2200, for example.

[0274] That is, the second positioning mechanism 270 may include a fourth, fifth, and sixth positioning portion. The fourth and fifth positioning portions may be disposed on one of the support member 2100 and the connecting member 2200, and the sixth positioning portion may be disposed on the other of the support member 2100 and the connecting member 2200. In this manner, when the support member 2100 is in the first rotational position, the sixth positioning portion and the fourth positioning portion are locked to each other. When the support member 2100 is in the second rotational position, the sixth positioning portion and the fifth positioning portion are locked to each other.

[0275] In this manner, the footrest device 2000 is in the unfolded state, as shown in Fig. 94. When the footrest device 2000 is no longer needed or when the child carrier as a whole needs to be folded, the first footrest 2310 (or the second footrest 2320) in the unfolded state can be rotated toward the support member 2100 to be in the folded state. During this process, the intermeshing of the third drive member 2610 and the fourth drive member 2620 allows the distal end of the second footrest 2320 (i.e., the end not connected to the support member 2100) to also be simultaneously rotated toward the support member 2100 to be in the folded state.

[0276] 98, the first footrest 2310 and the second footrest 2320 can be fixed to both sides of the support member 2100 via fixing parts 2500 (e.g., the attractive force between the first magnetic member 2510 and the second magnetic member 2520). Furthermore, as shown in FIG. 96, the support member 2100 in the first rotation position can be rotated to the second rotation position about the rotation axis 243, thereby switching the footrest device 2000 to the folded state.

[0277] 97 to 99, as the support member 2100 rotates, the second positioning protrusion 273, which was initially fitted in the third positioning recess 271, moves out of the third positioning recess 271 and moves to the first side surface 215b (as shown in FIG. 99) of the first pivot portion 2150 between the third positioning recess 271 and the fourth positioning recess 272. The first side surface 215b presses against the second positioning protrusion 273, causing the second positioning protrusion 273 to move from the first movement position to the second movement position, and the positioning reset member 274 is compressed. As the support member 2100 continues to rotate to the second rotation position, the second positioning protrusion 273 faces the fourth positioning recess 272. In this case, the second positioning protrusion 273, which is not subjected to the pressing force of the first side surface 215b, moves again to the first movement position due to the elastic restoring force of the positioning reset member 274, and engages with the fourth positioning recess 272. In this way, the folding of the footrest device 2000 is completed.

[0278] In another example, in the process of folding the footrest device 2000, the support member 2100 can also be rotated to a second rotational position relative to the connecting member 2200, and then the first footrest 2310 and the second footrest 2320 can be rotated to a folded state relative to the support member 2100. Alternatively, depending on the user's personal needs, the support member 2100 can only be rotated to the second rotational position relative to the connecting member 2200, or the first footrest 2310 and the second footrest 2320 can only be rotated to a folded state relative to the support member 2100, and this application is not limited thereto. The unfolding process of the footrest device 2000 is the reverse of the folding process and will not be described in detail here.

[0279] In the second example, as shown in FIGS. 100 and 101 , a footrest device 2000 includes a footrest component 2300, a support member 2100, and a connecting member 2200. The support member 2100 and the connecting member 2200 in this example have substantially the same configurations as the support member 2100 and the connecting member 2200 in the first example, and differ from the first example in the footrest component 2300 and the method of connecting the footrest component 2300 to the support member 2100. In this example, the footrest component 2300 and the pedal component 3100 of the pedal device 3000 are actually the same component. The footrest component 2300 is detachably connected to the support member 2100. When the footrest device 2000 is in use, the support member 2100 is in a first rotation position, and the footrest component 2300 is attached to the support member 2100. When the footrest device 2000 is not in use, the support member 2100 is in the second rotational position and the footrest component 2300 is detached from the support member 2100 .

[0280] Specifically, when the footrest device 2000 is in use, as shown in FIG. 100, the footrest component 2300 can be attached to the support member 2100 while the support member 2100 is in a first rotational position, allowing a child to rest their feet on the footrest component 2300. When the footrest device 2000 is not in use, as shown in FIG. 101, the footrest component 2300 can be detached from the support member 2100 and rotated to a second rotational position. The detached footrest component 2300 can be attached to the wheel assembly 20 as a pedal component 3100 for a child to ride on. In this example, the footrest component 2300 and the pedal component 3100 are actually the same component. The footrest component 2300 can support a child's feet when in use and function as the pedal component 3100 for a child to ride on when not in use. In this way, one part has dual uses, so there is no need to provide an additional pedal part 3100 (or footrest part 2300), which is convenient to use and has the advantage of reducing the number of parts in the child carrier and reducing manufacturing costs.

[0281] 103 to 105, the footrest device 2000 further includes a second connection mechanism 290. A footrest component 2300 is detachably connected to the support member 2100 via the second connection mechanism 290. In this example, two footrest components 2300 and two second connection mechanisms 290 are provided. The two footrest components 2300 are detachably connected to the left and right sides of the support member 2100 via the two second connection mechanisms 290, respectively. The configuration of the footrest components 2300 and the related connection relationships will be described in detail below, taking one of the footrest components 2300 and the corresponding second connection mechanism 290 as an example.

[0282] FIG. 102 is a schematic perspective view showing one of the connecting member 2200, the support member 2100, and the footrest component 2300. FIGS. 103 and 104 are cross-sectional views of the structure shown in FIG. 102 taken along line DD. The fifth locking member 291 (described in detail below) of the second connecting mechanism 290 shown in FIG. 103 is in a first locked position, and the fifth locking member 291 (described in detail below) of the second connecting mechanism 290 shown in FIG. 104 is in a first unlocked position. Specifically, the pedal component 2300 includes a footrest body 2330 and a first pin shaft 2340. The footrest body 2330 can be configured to support a child's foot. The footrest body 2330 has a substantially rectangular structure. A first insertion groove 2330a is provided in the axial direction of the footrest body 2330, substantially at a shaft portion of the footrest body 2330 in the axial direction. An end of the fifth locking member 291 is inserted into the first insertion groove 2330a, which allows the footrest body 2330 to rotate around the first pin shaft 2340, allowing a child to easily adjust the pedaling direction when the footrest component 2300 is used as the pedal component 3100. A fourth locking groove 2340a is provided in a circumferential portion of the first pin shaft 2340 that is outside the first insertion groove 2330a.

[0283] Specifically, as shown in FIGS. 102 to 104 , the second connection mechanism 290 includes a fifth locking member 291 and a lock resetting member 292. The fifth locking member 291 has a substantially sheet-like structure. The fifth locking hole 291a is disposed approximately in the center of the fifth locking member 291. The radial size of the fifth locking hole 291a is larger than the radial size of the first pin shaft 2340. The fifth locking member 291 is movably disposed within the support member 2100. The fifth locking member 291 is switchable between a first locked position and a first unlocked position. Specifically, a sixth accommodating cavity 217a and a seventh accommodating cavity 217b are disposed within the support member 2100. The third through-hole 218a and the fourth through-hole 218b are disposed opposite each other in the cavity wall of the sixth accommodating cavity 217a. The sixth accommodating cavity 217a communicates with the seventh accommodating cavity 217b via the third through-hole 218a. The sixth accommodating cavity 217a communicates with the outside of the support member 2100 via the fourth through-hole 218b. A first end of a fifth locking member 291 is disposed within the seventh accommodating cavity 217b, and a second end of the fifth locking member 291 is inserted into the sixth accommodating cavity 217a via the third through-hole 218a. In this example, the second end of the fifth locking member 291 can extend outside the support member 2100 through the fourth through-hole 218b. In other examples, the second end of the fifth locking member 291 may not extend outside the support member 2100. A portion of the fifth locking member 291 having the fifth locking hole 291a is generally located within the sixth accommodating cavity 217a.

[0284] 103 to 105, the lock reset member 292 is disposed between the fifth lock member 291 and the support member 2100. The lock reset member 292 is configured to bias the fifth lock member 291 to move to the first lock position. Specifically, the lock reset member 292 is disposed within the accommodating cavity 217b. One end of the lock reset member 292 abuts against the fifth lock member 291, and the other end of the lock reset member 292 abuts against the first cavity wall 219a of the seventh accommodating cavity 217b. The first cavity wall 219a is disposed to face the third through-hole 218a.

[0285] As shown in FIGS. 103 to 105, the end of the first pin shaft 2340, which includes the fourth locking groove 2340a, is inserted into the sixth accommodating cavity 217a of the support member 2100 and can extend through the fifth locking hole 291a. When the fifth locking member 291 is in the first lock position, the hole wall of the fifth locking hole 291a is inserted into the fourth locking groove 2340a. In this example, the support member 2100 is provided with an insertion opening 217c that communicates with the sixth accommodating cavity 217a. The end of the first pin shaft 2340, which includes the fourth locking groove 2340a, is inserted into the sixth accommodating cavity 217a through the insertion opening 217c and abuts against the second cavity wall 219b of the sixth accommodating cavity 217a. The second cavity wall 219b is positioned opposite the insertion opening 217c. In this manner, the insertion position of the first pin shaft 2340 within the support member 2100 can be limited. When the first pin shaft 2340 is inserted into a predetermined position, the first pin shaft 2340 extends through the fifth locking hole 291a, and the position of the fourth locking groove 2340a of the first pin shaft 2340 corresponds to the fifth locking member 291. In this case, when the fifth locking member 291 is in the first locking position as shown in FIG. 103, the hole wall of the fifth locking hole 291a is inserted into the fourth locking groove 2340a, and the footrest component 2300 is attached and fixed to the support member 2100. When the fifth locking member 291 is in the first unlocking position as shown in FIG. 104, the hole wall of the fifth locking hole 291a is separated from the fourth locking groove 2340a, and the footrest component 2300 can be removed from the support member 2100.

[0286] Furthermore, because the second end of the fifth locking member 291 is located outside the support member 2100, the portion of the fifth locking member 291 protruding from the support member 2100 can be operated to move from the first locked position to the first unlocked position. Alternatively, when the end of the first pin shaft 2340 having the fourth lock groove 2340 is inserted into the support member 2100, the first pin shaft 2340 moves the fifth locking member 291, which then overcomes the elastic force of the lock reset member 292 and moves from the first locked position to the first unlocked position.

[0287] Furthermore, the extension direction of the first pin shaft 2340 intersects with the movement direction of the fifth locking member 291, i.e., an angle is formed between the extension direction of the first pin shaft 2340 and the movement direction of the fifth locking member 291. In this example, the extension direction of the first pin shaft 2340 is substantially perpendicular to the movement direction of the fifth locking member 291.

[0288] In this example, two footrest components 2300 are detachably connected to two side surfaces of support member 2100, respectively. Therefore, compared to the first example, support member 2100 in this example does not need to be provided with second synchronization mechanism 2600 and fixing component 2500, and footrest device 2000 does not need to be provided with third pivot shaft 2410 and fourth pivot shaft 2420. Furthermore, as shown in FIGS. 106 to 109 , support member 2100 and connecting member 2200 in this example have the same configurations as those in the first example, and support member 2100 can be fixed between at least two rotational positions with respect to connecting member 2200 by second positioning mechanism 270, as in the first example.

[0289] 110 and 111 , the pedal device 3000 includes a pedal component 3100, a pedal base 3200, and a third connection mechanism 3300. In this embodiment, the pedal base 3200 is connectable to the wheel assembly 20, but the present application is not limited thereto. The pedal component 3100 is detachably connected to the pedal base 3200 via the third connection mechanism 3300. In other examples, the pedal device 3000 can be disposed directly on the frame 100.

[0290] In the child carriers in the above examples, when the footrest device 2000 is used in the first example, the pedal component 3100 and the footrest component 2300 are two independent components, and when the footrest device 2000 is used in the second example, the pedal component 3100 and the footrest component 2300 are the same component. However, regardless of which footrest device 2000 is used, the pedal component 3100 can have the same configuration.

[0291] Specifically, as shown in FIGS. 111 and 112, the pedal component 3100 includes a pedal body 3110 and a second pin shaft 3120. The pedal body 3110 allows a child riding on the child carrier to pedal. The pedal body 3110 has a generally rectangular structure. A second insertion groove 3110a (see FIGS. 114 and 115) is provided along the axial direction of the pedal body 3110, approximately at the axis of the pedal body 3110. The second pin shaft 3120 is partially inserted into the second insertion groove 3110a, allowing the pedal body 3110 to rotate around the second pin shaft 3120, making it easier for the child to adjust the pedaling direction.

[0292] Specifically, as shown in FIGS. 112 and 113 , the pedal base 3200 includes a fifth housing 3210 and a sixth housing 3220. The fifth housing 3210 and the sixth housing 3220 are fixed to each other to form a third mounting cavity (not shown) that receives the third connection mechanism 3300. The wheel assembly 20 is connected to a side of the fifth housing 3210 that is remote from the sixth housing 3220. A fourth receiving groove 3210a and a receiving boss 3210b are provided on a surface of the fifth housing 3210 that faces the sixth housing 3220. The receiving boss 3210b has a cylindrical structure. The fourth receiving cavity 3210c extends through the receiving boss 3210b in the axial direction of the second pin shaft 3120. The first groove wall 3210f of the fourth receiving groove 3210a is provided with a strip-shaped insertion hole 3210d. The fourth receiving groove 3210a is in communication with the fourth receiving cavity 3210c via the insertion hole 3210d. The sixth housing 3220 is provided with a third operating hole 3220a and a mounting hole 3220b arranged at intervals. When the sixth housing 3220 and the fifth housing 3210 are fixed to each other, the receiving boss 3210b extends through the mounting hole 3220b and protrudes outward from the outer surface of the sixth housing 3220. The sixth housing 3220, the second groove wall 3210g of the fourth receiving groove 3210a, and the cavity wall of the fourth receiving cavity 3210c form a fourth mounting cavity. The second groove wall 3210g is disposed opposite the first groove wall 3210f.

[0293] Specifically, as shown in FIGS. 113 and 114, the third connection mechanism 3300 includes a sixth locking member 334, a third operating member 331, and an operating reset member 332.

[0294] In this embodiment, as shown in FIGS. 113 to 115, a fifth locking groove 3120a is circumferentially formed in a portion of the second pin shaft 3120 located outside the second insertion groove 3110a. The sixth locking member 334 is movably disposed on the pedal base 3200. In this embodiment, the sixth locking member 334 has a substantially sheet-like structure. The sixth locking hole 334a extends through the sixth locking member 334. The radial size of the sixth locking hole 334a is larger than the radial size of the second pin shaft 3120.

[0295] The third operating member 331 is a quick-release button. One end of the third operating member 331 is fixedly connected to the sixth locking member 334, and the other end of the third operating member 331 is provided with an operating portion 331a. In this embodiment, at least a portion of the third operating member 331 and the sixth locking member 334 are movably disposed within the fourth mounting cavity. Specifically, at least a portion of the third operating member 331 is movably disposed within the fourth receiving groove 3210a. One end of the sixth locking member 334 is connected to the third operating member 331, and the other end is inserted into the fourth receiving cavity 3210c through the insertion hole 3210d. The operating portion 331a protrudes from the outer surface of the sixth housing 3220 through the third operating hole 3220a, facilitating user operation. The operating reset member 332 is also disposed within the fourth receiving groove 3210a. One end of the operation reset member 332 is connected to or abuts against the third operation member 331, and the other end of the operation reset member 332 abuts against the second groove wall 3210g of the fourth receiving groove 3210a. In this embodiment, the operation reset member 332 is disposed on a side of the third operation member 331 away from the sixth lock member 334. Optionally, the operation reset member 332 is a spring.

[0296] Furthermore, the sixth locking member 334 is operable to move between a first operating position (as shown in FIG. 114) and a second operating position (as shown in FIG. 115). In this embodiment, the second operating position is located in the F10 direction from the first operating position. That is, the second operating position is located above the first operating position. One end of the second pin shaft 3120, which has the fifth locking groove 3120a, extends into the fourth receiving cavity 3210c, i.e., into the fourth mounting cavity, and through the sixth locking hole 334a. When the pedal component 3100 is mounted in place, the hole wall of the sixth locking hole 334a precisely faces the fifth locking groove 3120a on the second pin shaft 3120.

[0297] As shown in FIG. 114 , when the sixth locking member 334 is in the first operating position, the upper portion of the hole wall of the sixth locking hole 334a is inserted into the fifth locking groove 3120a, and the operation reset member 332 biases the third operating member 331, causing the third operating member 331 to move the sixth locking member 334 toward the first operating position. In this manner, the sixth locking member 334 is held in the first operating position, and the pedal assembly 3100 is fixedly connected to the pedal base 3200. When it is necessary to remove the pedal assembly 3100 from the pedal base 3200, the operating portion 331a is pushed in direction F10, causing the third operating member 331 to move the sixth locking member 334 along direction F10 to the second operating position, and the operation reset member 332 is compressed, thereby separating the hole wall of the sixth locking hole 334a from the fifth locking groove 3120a. In this way, the pedal component 3100 is unlocked from the pedal base 3200, and the pedal component 3100 can be removed from the pedal base 3200. Note that because the radial size of the sixth lock hole 334a is larger than the radial size of the second pin shaft 3120, the lower side of the hole wall of the sixth lock hole 334a does not engage with the fifth lock groove 3120a. The process of attaching the pedal component 3100 to the pedal base 3200 is the reverse of the above-described removal process, and therefore will not be described again.

[0298] Furthermore, as shown in FIG. 113, a fourth limiting portion 3210e is disposed within the fourth mounting cavity, and a fifth limiting portion 331b is disposed on the third operating member 331. When the sixth locking member 334 is in the first operating position, the fourth limiting portion 3210e abuts against the fifth limiting portion 331b. In this embodiment, the fourth limiting portion 3210e is disposed on the first groove wall 3210f of the fourth receiving groove 3210a, and the fifth limiting portion 331b is the lower end surface of the third operating member 331. The configuration of the fourth limiting portion 3210e and the fifth limiting portion 331b limits the movement range of the sixth locking member 334, preventing excessive movement of the sixth locking member 334 in the direction opposite to F10. Additionally, the third operating hole 3220a on the sixth housing 3220 can also be sized to limit the range of movement of the third operating member 331 and the sixth locking member 334 in the F10 direction and the reverse F10 direction, thereby limiting the movement of the sixth locking member 334 between the first operating position and the second operating position and preventing excessive movement of the sixth locking member 334.

[0299] In this embodiment, two pedal devices 3000 are provided. The two pedal devices 3000 are connected to either side of the front wheel 30, respectively, so that a child can easily ride the child transport device by placing their feet on the pedal bodies 3110 of the pedal devices 3000 on both sides. In other embodiments, more than two pedal devices 3000 may be provided. For example, two pedal components 3100 of different heights or sizes may be placed on either side of the front wheel 30, respectively, to make it easier for children of different ages or builds to ride.

[0300] In the above-described footrest device 2000, when the footrest device 2000 is in use, the support member 2100 rotates to a first rotation position away from the frame 100 (see FIG. 106), and the footrest component 2300 is in an unfolded state or attached to the support member 2100, allowing a child to rest their feet on the footrest component 2300 and preventing their feet from dangling in the air for a long period of time or accumulating fatigue due to a long ride. When the frame 100 is in a folded state or the footrest device 2000 is not in use, the support member 2100 can rotate to a second rotation position (as shown in FIG. 108) close to the frame 100, and the footrest 2300 is in a folded state or detachable from the support member 2100, so that the pedal component 2300 does not interfere with the child's riding process, making the overall child carrier neater, more aesthetically pleasing, and easier to use. When the footrest component 2300 is folded, the space occupied by the footrest device 2000 is also reduced. A child carrier equipped with the above-described footrest device 2000 can more fully rest a child's feet, providing a better user experience.

[0301] In one aspect of the present application, a child carrier is provided, including a frame having front and rear wheels and an unfolded and folded state. The frame includes a first frame, a second frame, and a connecting mechanism. The first frame is connected to the front wheels. The second frame is connected to the rear wheels. The second frame is provided with a first movable connecting portion. The connecting mechanism includes a first connecting frame, a second connecting frame, and a rotating base rotatably connected to the second frame.

[0302] In one embodiment, the child carrier further includes a handlebar assembly including at least two handlebars having a plurality of use heights and a first synchronization mechanism disposed between the at least two handlebars, the at least two handlebars being configured to be synchronously switched to different use heights by the first synchronization mechanism.

[0303] In one embodiment, the at least two handlebars include a first handlebar and a second handlebar, respectively. The first handlebar includes a first connecting portion and a first holding portion. The second handlebar includes a second connecting portion and a second holding portion. The first connecting portion and the second connecting portion are rotatably connected to each other. The first synchronizing mechanism is disposed between the first connecting portion and the second connecting portion. The first synchronizing mechanism causes the first connecting portion and the second connecting portion to rotate synchronously in opposite directions to each other, thereby synchronously adjusting the use heights of the first holding portion and the second holding portion.

[0304] In one embodiment, the first synchronization mechanism includes a first drive element and a second drive element, the first drive element and the second drive element are drivingly connected, the first drive element is drivingly connected to the first handlebar, and the second drive element is drivingly connected to the second handlebar.

[0305] In one embodiment, the first handlebar is an L-shaped rod or an arc-shaped rod. The first connecting portion and the first holding portion are respectively disposed at opposite ends of the first handlebar. The second handlebar is an L-shaped rod or an arc-shaped rod. The second connecting portion and the second holding portion are respectively disposed at opposite ends of the second handlebar.

[0306] In one embodiment, the at least two handlebars include a first handlebar and a second handlebar. The first handlebar includes a first mating ring. The first mating ring includes a first internal gear portion in a circumferential direction. The second handlebar includes a second mating ring. The second mating ring includes a second internal gear portion in a circumferential direction. The first synchronizing mechanism includes a first external gear and a second external gear. The first external gear meshes with the first internal gear portion, and the second external gear meshes with the second internal gear portion.

[0307] In one embodiment, the first and second mating rings overlap to form a receiving cavity, and the first and second external gears are disposed within the receiving cavity.

[0308] In one embodiment, the handlebar assembly further includes a support base. The support base is connected to the frame. The support base includes a mounting member. The mounting member is provided with a first pivot shaft and a second pivot shaft that are spaced apart. The first external gear and the second external gear are rotatably connected to the first pivot shaft and the second pivot shaft, respectively. The first mating ring and the second mating ring are configured to be rotatable relative to the mounting member.

[0309] In one embodiment, the first handlebar is an L-shaped rod or an arc-shaped rod. The first handlebar further includes a first retaining portion. The first mating ring and the first retaining portion are respectively disposed on opposite ends of the first handlebar. The second handlebar is an L-shaped rod or an arc-shaped rod. The second handlebar further includes a second retaining portion. The second mating ring and the second retaining portion are respectively disposed on opposite ends of the second handlebar.

[0310] In one embodiment, the handlebar assembly further includes a locking mechanism, wherein when the locking mechanism is in a locked state, the at least two handlebars are locked at one of the use heights, and when the locking mechanism is in an unlocked state, the at least two handlebars can be switched to one of the other use heights.

[0311] In one embodiment, the at least two handlebars include a first handlebar and a second handlebar. The locking mechanism includes a push button. The push button is movable between a first position and a second position. One of the first handlebar and the push button includes a first locking groove, and the other of the first handlebar and the push button includes a first locking portion. One of the second handlebar and the push button includes a second locking groove, and the other includes a second locking portion. When the push button is in the first position, the first locking portion and the second locking portion are engaged with the first locking groove and the second locking groove, respectively. When the push button is in the second position, the first locking portion and the second locking portion are disengaged from the first locking groove and the second locking groove, respectively.

[0312] In one embodiment, one of the second handlebar and the press button further includes a third locking groove, and the other of the second handlebar and the press button further includes a third locking portion. When the press button is in the first position, the third locking portion is engaged with the third locking groove. When the press button is in the second position, the third locking portion is disengaged from the third locking groove.

[0313] In one embodiment, the push button includes an unlocking member operable to move the push button to the second position.

[0314] In one embodiment, the locking mechanism further includes a push button reset member that biases the push button toward the first position.

[0315] In one embodiment, the first handlebar includes a first mating ring. The first mating ring has a first internal gear portion in a circumferential direction. The second handlebar includes a second mating ring. The second mating ring has a second internal gear portion in a circumferential direction. The first synchronizing mechanism includes a first external gear and a second external gear. The first external gear meshes with the first internal gear portion, and the second external gear meshes with the second internal gear portion. A first locking groove is provided in the first mating ring. A second locking groove is provided in the second mating ring. The first locking portion and the second locking portion are provided in the push button.

[0316] In one embodiment, a third locking groove is further provided on one of the second handlebar and the push button, and a third locking portion is further provided on the other of the second handlebar and the push button. When the push button is in the first position, the third locking portion is engaged with the third locking groove. When the push button is in the second position, the third locking portion is disengaged from the third locking groove. The third locking groove is provided on the first fitting ring and is arranged to face the first locking groove. The third locking portion is provided on the push button.

[0317] In one embodiment, the push button includes a second push rod and a lock rod. An angle is formed between the second push rod and the lock rod. The lock rod is an L-shaped bar including a first rod and a second rod arranged at an angle. One end of the first rod remote from the second rod is connected to the second push rod. The second push rod has an engagement end. When the push button is in the first position, the first mating ring and the second mating ring are located between the second rod and the engagement end. The second rod forms a first locking portion, and the engagement end forms a second locking portion.

[0318] In one embodiment, the handlebar assembly further includes a support base connected to the frame, at least a portion of the first handlebar and at least a portion of the second handlebar are disposed within the support base and are rotatable relative to the support base, and the push button is movably disposed within the support base.

[0319] In one embodiment, the support base is provided with a first operating hole, and the push button is provided with an unlocking operating member, at least a portion of which is operable to protrude from the surface of the support base through the first operating hole.

[0320] In one embodiment, the child carrier further includes a backrest assembly, an armrest assembly connected to the backrest assembly and having an unfolded state and a folded state relative to the backrest assembly, and a first positioning mechanism disposed between the backrest assembly and the armrest assembly. When the armrest assembly is in the unfolded state, the first positioning mechanism allows the armrest assembly to be fixed in a first position relative to the backrest assembly. When the armrest assembly is in the folded state, the first positioning mechanism allows the armrest assembly to be fixed in a second position relative to the backrest assembly.

[0321] In one embodiment, the first positioning mechanism includes a first positioning portion and a second positioning portion disposed on one of the backrest assembly and the armrest assembly, and a third positioning portion disposed on the other of the backrest assembly and the armrest assembly. When the armrest assembly is in the unfolded state, the third positioning portion is lockable with the first positioning portion to fix the armrest assembly in a first position relative to the backrest assembly. When the assembly is in the folded state, the third positioning portion is lockable with the second positioning portion to fix the armrest assembly in a second position relative to the backrest assembly.

[0322] In one embodiment, the armrest assembly can switch the third positioning portion from a locking fit with the first positioning portion to another locking fit with the second positioning portion, or the armrest assembly can switch the third positioning portion from a locking fit with the second positioning portion to another locking fit with the first positioning portion.

[0323] In one embodiment, the first positioning mechanism includes a first positioning recess and a second positioning recess spaced apart on the backrest assembly, and a first positioning protrusion movably disposed on the armrest assembly. When the armrest assembly is in the unfolded state, the first positioning protrusion can be inserted into the first positioning recess to fix the armrest assembly in a first position relative to the backrest assembly. When the assembly is in the folded state, the first positioning protrusion can be inserted into the second positioning recess to fix the armrest assembly in a second position relative to the backrest assembly.

[0324] In one embodiment, the first positioning protrusion is a ball, and the first and second positioning recesses are partially spherical holes that can mate with the ball.

[0325] In one embodiment, the first positioning mechanism further includes a fifth reset member. The fifth reset member is disposed between the first positioning protrusion and the armrest assembly. The first positioning protrusion has a lock position. When the first positioning protrusion is in the lock position, the first positioning protrusion is insertable into the first positioning recess or the second positioning recess. The fifth reset member biases the first positioning protrusion toward the lock position.

[0326] In one embodiment, the armrest assembly and the backrest assembly are rotatably connected to one another.

[0327] In one embodiment, the backrest assembly includes a mounting base and a fixed base. The armrest assembly is fixedly connected to the fixed base. The fixed base is rotatably connected to the mounting base. The first positioning mechanism includes a first positioning recess, a second positioning recess, and a first positioning protrusion. The first positioning recess and the second positioning recess are spaced apart from each other on the mounting base. The first positioning protrusion is movably disposed on the mounting base. When the armrest assembly is in an unfolded state, the first positioning protrusion is insertable into the first positioning recess to fix the armrest assembly in a first position relative to the backrest assembly. When the armrest assembly is in a folded state, the first positioning protrusion is insertable into the second positioning recess to fix the armrest assembly in a second position relative to the backrest assembly.

[0328] In one embodiment, the fixed base has an accommodation groove extending in the direction of the rotation axis between the fixed base and the mounting base, and the first positioning protrusion is movably disposed in the accommodation groove.

[0329] In one embodiment, the first positioning mechanism further includes a fifth reset member disposed in the receiving groove, with both ends of the fifth reset member abutting the first positioning protrusion and the bottom of the receiving groove, respectively.

[0330] In one embodiment, the back assembly further includes a connection base, the mounting base is rotatably connected to the connection base, and the fixed base is rotatably connected to the mounting base.

[0331] In one embodiment, the connection base includes a third housing and a fourth housing fixedly connected to each other. The mounting base is rotatably connected to the fourth housing. The mounting base, the third housing, and the fourth housing enclose a fourth receiving cavity. Both the first and second positioning recesses are disposed on a side of the mounting base facing the fourth housing.

[0332] In one embodiment, the connection base includes a third housing and a fourth housing fixedly connected to each other. The mounting base is rotatably connected to the fourth housing. The third housing and the fourth housing enclose a fourth receiving cavity. The fourth housing has a mounting opening extending therethrough. The fixed base has a mounting boss. The mounting boss has a receiving groove. The first positioning protrusion is movably disposed within the receiving groove and is partially movable outward from the receiving groove. The mounting boss extends through the mounting opening into the fourth receiving cavity.

[0333] In one embodiment, when the armrest assembly is in an intermediate state between the unfolded state and the folded state, the first positioning mechanism enables the armrest assembly to be fixed in a third position relative to the backrest assembly.

[0334] In one embodiment, the back assembly includes a back body and a fixed base, the fixed base is fixedly connected to the armrest assembly, the fixed base is rotatably connected to the back body, and the armrest body is removably connected to the fixed base.

[0335] In one embodiment, the fixed base is provided with an engagement portion, and the armrest body is provided with a positioning groove that can be engaged with the engagement portion.

[0336] In one embodiment, the child carrier further includes a first locking mechanism. The first locking mechanism includes a third locking member and a third locking hole. The third locking member is movably disposed on one of the armrest body and the fixed base, and the third locking hole is disposed on the other of the armrest body and the fixed base. The third locking member is lockable with the third locking hole.

[0337] In one embodiment, the child carrier further includes a first locking mechanism. The first locking mechanism includes a third locking member and a third locking hole disposed in the fixed base. The third locking member is pivotally connected to the armrest body at a first pivot point. The third locking member has a first operating end and a first locking end. The first pivot point is disposed between the first operating end and the first locking end. The first locking end is insertable into the third locking hole. The first operating end is operable to separate the first locking end from the third locking hole.

[0338] In one embodiment, the first locking mechanism further includes a sixth reset member disposed between the first operating end and the armrest body, and biases the first locking end to rotate in a direction that inserts the first locking end into the third locking hole.

[0339] In one embodiment, the armrest assembly includes an armrest body, a first armrest rod, and a second armrest rod. The first armrest rod and the second armrest rod are connected to opposite ends of the armrest body and opposite ends of the backrest assembly. The first positioning mechanism is disposed between the first armrest rod and the backrest assembly and between the second armrest rod and the backrest assembly.

[0340] In one embodiment, the child carrier further includes a frame and an adjustment mechanism. The backrest assembly is connected to the frame. The adjustment mechanism is disposed between the frame and the backrest assembly. The adjustment mechanism selectively limits or allows relative rotation between the backrest assembly and the frame.

[0341] In one embodiment, the adjustment mechanism includes a second locking component having a locked state in which relative rotation between the backrest assembly and the frame is restricted and an unlocked state in which relative rotation between the backrest assembly and the frame is not restricted, and an operating component connected to the second locking component for switching the second locking component between the locked state and the unlocked state.

[0342] In one embodiment, the backrest assembly further includes a mounting base. The mounting base is fixedly connected to the frame. The second locking component includes a limiting hole disposed in the mounting base and a limiting pin movably disposed on the backrest assembly. The limiting pin is insertable into the limiting hole.

[0343] In one embodiment, at least two limiting holes are provided, and limiting pins can be inserted into different limiting holes to secure the back assembly at different relative angles to the frame.

[0344] In one embodiment, the operating component includes an unlocking member and a second tensioning member, both ends of which are connected to the unlocking member and the second locking component, respectively, and the unlocking member is drivable via the second tensioning member to switch the second locking component from a locked state to an unlocked state.

[0345] In one embodiment, the operating component further includes a seventh reset member that biases the second tension member in a direction that drives the second locking component to switch to the locked state.

[0346] In one embodiment, the child carrier further includes a frame, the back assembly being removably connected to the frame.

[0347] In one embodiment, the back assembly further includes a connection base, the back assembly being detachably connected to the frame via the connection base.

[0348] In one embodiment, the child carrier further includes a second locking mechanism. The second locking mechanism includes a first locking element and a second locking element. The first locking element is disposed on the connecting base. The second locking element is disposed on the frame. The first locking element is lockable with or unlockable from the second locking element.

[0349] In one embodiment, the child carrier further includes a second locking mechanism. The second locking mechanism includes a fourth locking member and a fourth locking hole. The fourth locking member is movably disposed on the connection base. The fourth locking hole is disposed on the frame. The fourth locking member is lockable with or unlockable from the fourth locking hole.

[0350] In one embodiment, the fourth locking member is pivotally connected to the connection base at a second pivot point. The fourth locking member includes a second operating end and a second locking end. The second pivot point is disposed between the second operating end and the second locking end. The second locking end is insertable into the fourth locking hole. The second operating end is operable to separate the second locking end from the fourth locking hole.

[0351] In one embodiment, the connection base includes a third housing and a fourth housing. The third housing and the fourth housing cooperate to enclose a fifth receiving cavity. The fourth locking member is disposed within the fifth receiving cavity. The third housing has a through hole. The second locking end extends through the through hole and can be inserted into the fourth locking hole. The fourth housing has a second operating hole. The second operating end at least partially protrudes from an outer surface of the fourth housing through the second operating hole.

[0352] In one embodiment, the second locking mechanism further includes an eighth reset member disposed between the second operating end and the connection base, and biases the second operating end in a direction that moves the second locking end to lock into the fourth locking hole.

[0353] In one embodiment, one of the frame and the backrest assembly includes a guide boss, and the other of the frame and the backrest assembly includes a guide groove, the guide boss being insertable into the guide groove.

[0354] In one embodiment, the side wall of the guide groove is provided with an insertion opening, and the guide boss can be inserted into the guide groove through the insertion opening.

[0355] In one embodiment, the guide boss has a guide hole, the guide groove has a bottom with a guide rib, and when the guide boss is inserted into the guide groove, the guide rib is inserted into the guide hole.

[0356] In one embodiment, the frame includes a seat assembly, and two sides of the backrest assembly are removably connected to two sides of the seat assembly, respectively.

[0357] In one embodiment, the child carrier further includes a footrest device. The footrest device includes a support member configured to be connected to the frame and a footrest component configured to be pivotally or detachably connected to the support member. The support member is switchable between a first rotational position and a second rotational position. When the support member is switched from the first rotational position to the second rotational position, the support member is folded toward the frame. The footrest component is configured to be switchable between an unfolded state and a folded state when pivotally connected to the support member. When the footrest component is in the unfolded state, the footrest component is configured to support a child's feet. When the footrest component is in the folded state, the footrest component is folded toward the support member. The footrest device has an in-use state and an in-use state. When the footrest device is in the in-use state, the support member is in the first rotational position and the footrest component is in the unfolded state or attached to the support member. When the footrest device is not in use, the support member is in the second rotational position and the footrest components are folded or detached from the support member.

[0358] In one embodiment, the footrest component can be connected to a pedal base of the child transport device and function as a pedal component for a child to drive and move the child transport device.

[0359] In one embodiment, the footrest component includes a footrest body on which a child's feet rest and a first pin shaft connected to the footrest body and having a fourth lock groove circumferentially formed at one end. The footrest device further includes a second connection mechanism. The second connection mechanism includes a fifth locking member movably disposed on the support member and switchable between a first locked position and a first unlocked position, a fifth locking hole disposed in the fifth locking member, the fifth locking hole having a radial size larger than the radial size of the first pin shaft, and a lock reset member disposed between the fifth locking member and the support member. The lock reset member biases the fifth locking member to move to the first locked position. The end of the first pin shaft, which is provided with the fourth locking groove, is configured to be inserted into the support member and extend through the fifth locking hole. When the fifth locking member is in the first locked position, the hole wall of the fifth locking hole is inserted into the fourth locking groove.

[0360] In one embodiment, at least a portion of the fifth locking member protrudes from the support member. The portion of the fifth locking member protruding from the support member is operable to move from the first locked position to the first unlocked position. Alternatively, when an end of a first pin shaft having the fourth locking groove is inserted into the support member, the first pin shaft is drivable to move the fifth locking member from the first locked position to the first unlocked position.

[0361] In one embodiment, the first pin shaft is partially inserted into the footrest component, the end of the first pin shaft having the fourth locking groove protrudes from the footrest component, and the extension direction of the first pin shaft intersects with the movement direction of the fifth locking member.

[0362] In one embodiment, the footrest device further includes a connecting member, the connecting member being fixedly connected to the frame, and the support member being pivotally connected to the connecting member.

[0363] In one embodiment, the footrest device further includes a second positioning mechanism. The second positioning mechanism includes a fourth positioning portion, a fifth positioning portion, and a sixth positioning portion. The fourth positioning portion and the fifth positioning portion are disposed on one of the support member and the connecting member, and the sixth positioning portion is disposed on the other of the support member and the connecting member. When the support member is in the first rotation position, the sixth positioning portion and the fourth positioning portion are locked to each other. When the support member is in the second rotation position, the sixth positioning portion and the fifth positioning portion are locked to each other.

[0364] In one embodiment, the footrest device further includes a second positioning mechanism. The second positioning mechanism includes a third positioning recess, a fourth positioning recess, and a second positioning protrusion. The third positioning recess and the fourth positioning recess are disposed on one of the support member and the connecting member, and the second positioning protrusion is movably disposed on the other of the support member and the connecting member. The second positioning protrusion has a first movement position and a second movement position. When the second positioning protrusion is in the first movement position, the second positioning protrusion can be fitted into the third positioning recess or the fourth positioning recess. When the second positioning protrusion is in the second movement position, the second positioning protrusion can be disengaged from the third positioning recess or the fourth positioning recess.

[0365] In one embodiment, the third positioning recess is a first positioning groove, the fourth positioning recess is a second positioning groove, and the second positioning protrusion is a ball.

[0366] In one embodiment, the second positioning mechanism further includes a positioning reset member disposed between the second positioning protrusion and the support member, the positioning reset member biasing the second positioning protrusion to move toward the first movement position.

[0367] In one embodiment, the support member includes a support body configured to be connected to the footrest component and a first pivot portion protruding from the support body. The first pivot portion includes a first side surface having a third positioning recess and a fourth positioning recess. The connecting member includes a second pivot portion rotatably connected to the first pivot portion via a rotation axis. The second pivot portion has a second side surface opposing the first side surface. A second mounting groove is formed on the second side surface. The second positioning protrusion is movably disposed within the second mounting groove. When the second positioning protrusion is in the first movement position, at least a portion of the second positioning protrusion protrudes from the second mounting groove and is engageable with the third positioning recess or the fourth positioning recess. When the second positioning protrusion is in the second movement position, the second positioning protrusion retracts into the second mounting groove and is disengaged from the third positioning recess or the fourth positioning recess.

[0368] In one embodiment, the third positioning recess and the fourth positioning recess are arranged around the rotation shaft, and the extension direction of the second mounting groove is substantially parallel to the longitudinal direction of the rotation shaft.

[0369] In one embodiment, the support member includes two first pivot portions arranged opposite each other. The two first pivot portions are rotatably connected to two side surfaces of the second pivot portion via a rotation axis, respectively. The second mounting groove is arranged on each of two second side surfaces of the second pivot portion that face the two first pivot portions. Two second positioning mechanisms are provided. The two second positioning mechanisms are respectively arranged between the second pivot portion and the corresponding two first pivot portions.

[0370] In one embodiment, the footrest device further includes a second positioning mechanism. The second positioning mechanism includes a fourth positioning portion, a fifth positioning portion, and a sixth positioning portion. The fourth positioning portion and the fifth positioning portion are disposed on one of the support member and the connecting member, and the sixth positioning portion is disposed on the other of the support member and the connecting member. The fourth positioning portion and the fifth positioning portion are configured to be magnetically locked with the sixth positioning portion.

[0371] In one embodiment, the footrest component includes at least a first footrest and a second footrest, each pivotally connected to opposite sides of the support member.

[0372] In one embodiment, the footrest device further includes a second synchronization mechanism. The second synchronization mechanism includes a third drive member and a fourth drive member. The third drive member is connected to the first footrest. The fourth drive member is connected to the second footrest. The third drive member is drivingly connected to the fourth drive member.

[0373] In one embodiment, the footrest device further includes a second synchronization mechanism. The second synchronization mechanism includes a third drive member and a fourth drive member. The third drive member is connected to the first footrest. The fourth drive member is connected to the second footrest. The third drive member includes a first gear toothing portion, and the fourth drive member includes a second gear toothing portion. The first gear toothing portion and the second gear toothing portion can mesh with each other.

[0374] In one embodiment, the footrest device further includes a third pivot shaft and a fourth pivot shaft. The third drive member and the first footrest are both fixedly connected to the third pivot shaft. The third pivot shaft is rotatably connected to the support member. The fourth drive member and the second footrest are both fixedly connected to the third pivot shaft. The fourth pivot shaft is rotatably connected to the support member.

[0375] In one embodiment, the footrest component is pivotally connected to the support member. The footrest device further includes a fixed component. The fixed component includes a first magnetic member disposed on the footrest component and a second magnetic member disposed on the support member. When the footrest component is in the folded state, the first magnetic member and the second magnetic member attract each other.

[0376] In one embodiment, the footrest component is pivotally connected to the support member. The footrest device further includes a fixed component. The fixed component includes a permanent magnet disposed on the footrest component and a rotation shaft. The support component is pivotally connected to the frame via the rotation shaft, and the rotation shaft is made of a ferromagnetic material. When the footrest component is in the folded state, the permanent magnet is attracted to the rotation shaft.

[0377] In one embodiment, the footrest component and the support member are pivotally connected to one another via a third pivot shaft, and the support member and the connecting member are pivotally connected to one another via a rotation axis that is spaced apart from and not parallel to the third pivot shaft.

[0378] In one embodiment, the child transport device further includes a pedal device including a pedal component, a pedal base connected to the wheel assembly, and a third connection mechanism, wherein the pedal component is removably connected to the pedal base via the third connection mechanism.

[0379] In one embodiment, the pedal component and the footrest component are the same component.

[0380] In one embodiment, the pedal component includes a fifth locking groove. The third connection mechanism includes a sixth locking member movably disposed on the pedal base. The sixth locking member has a first operating position and a second operating position. When the sixth locking member is in the first operating position, the sixth locking member can be inserted into the fifth locking groove, thereby fixedly connecting the pedal component to the pedal base. When the sixth locking member is in the second operating position, the sixth locking member is disengaged from the fifth locking groove, thereby disengaging the pedal component from the pedal base.

[0381] In one embodiment, the pedal component includes a pedal body and a second pin shaft connected to each other. The second pin shaft is provided with a fifth locking groove. The third connection mechanism includes a sixth locking member movably disposed on the pedal base. The sixth locking member is provided with a sixth locking hole. The sixth locking hole has a radial size larger than the radial size of the second pin shaft. The second pin shaft extends through the sixth locking hole. The fifth locking groove is located in a position corresponding to the sixth locking hole. The sixth locking member has a first operating position and a second operating position. When the sixth locking member is in the first operating position, a portion of the hole wall of the sixth locking hole is inserted into the fifth locking groove. When the sixth locking member is in the second operating position, a portion of the hole wall of the sixth locking hole is separated from the fifth locking groove.

[0382] In one embodiment, the third connection mechanism further includes a third operating member fixedly connected to the sixth locking member, the third operating member operable to move the sixth locking member from the first operating position to the second operating position, and an operating reset member disposed between the third operating member and the pedal base, the operating reset member biasing the third operating member to move the sixth locking member to the first operating position.

[0383] In one embodiment, the child transport device further includes a wheel assembly. The wheel assembly is rotatably connected to the frame. The pedal base includes a fifth housing connected to the wheel assembly. The fifth housing has a fourth receiving groove and a receiving boss. A fourth receiving cavity is formed through the receiving boss. An insertion hole is formed in a first groove wall of the fourth receiving groove, and the fourth receiving groove communicates with the fourth receiving cavity through the insertion hole. The pedal base also includes a sixth housing connecting the third operating hole, the fourth receiving groove, and the fourth receiving cavity. The fifth and sixth housings are connected to each other to form a mounting cavity. The fourth receiving groove and the receiving boss are disposed within the mounting cavity. The receiving boss extends through the mounting hole and protrudes from the outer surface of the sixth housing. At least a portion of the second pin shaft is inserted into the fourth receiving cavity. The sixth locking member and at least a portion of the third operating member are movably disposed within the mounting cavity. At least a portion of the sixth locking member is inserted into the fourth receiving cavity through the insertion hole and is inserted into and separated from the fifth locking groove of the second pin shaft. At least a portion of the third operating member protrudes outward from the mounting cavity through the third operating hole.

[0384] In one embodiment, both ends of the operation reset member abut against the second groove wall of the third operation member and the fourth receiving groove, respectively, and the second groove wall is disposed opposite the first groove wall.

[0385] In one embodiment, the first groove wall forms a fourth limiting portion, the third operating member includes a fifth limiting portion, and when the sixth locking member is in the first operating position, the fourth limiting portion abuts the fifth limiting portion.

[0386] In one embodiment, there are at least two pedal devices, each drivingly connected to either side of the wheel assembly.

[0387] In one embodiment, the child carrier further includes a footrest device. The footrest device includes a footrest body configured to be connected to the frame. The footrest body has an unfolded state and a folded state. When the footrest body is in the unfolded state, the footrest body is configured to rest a child's feet on it.

[0388] In one embodiment, the footrest device further includes a support member configured to be connected to the frame. The footrest body is rotatably connected to the support member. The footrest body has an unfolded state and a folded state relative to the support member. When the footrest body is in the unfolded state, the footrest body is configured to support a child's feet. When the footrest body is in the folded state, the footrest body is folded toward the support member.

[0389] In one embodiment, the footrest device further includes a support member configured to be connected to the frame. The footrest body includes a first footrest and a second footrest. The first footrest and the second footrest are rotatably connected to opposite sides of the support member. The first footrest and the second footrest each have an unfolded state and a folded state relative to the support member. When the first footrest or the second footrest is in the unfolded state, the first footrest or the second footrest is configured to support a child's feet. When the first footrest or the second footrest is in the folded state, the first footrest or the second footrest is folded so as to approach the support member.

[0390] In one embodiment, the footrest device further includes a second synchronization mechanism disposed between the first footrest and the second footrest, the second synchronization mechanism enabling synchronized rotation of the first footrest and the second footrest.

[0391] In one embodiment, the footrest device further includes a second synchronization mechanism. The second synchronization mechanism includes a third drive member and a fourth drive member. The third drive member is connected to the first footrest. The fourth drive member is connected to the second footrest. The third drive member is drivingly connected to the fourth drive member.

[0392] In one embodiment, the footrest device further includes a second synchronization mechanism. The second synchronization mechanism includes a third drive member and a fourth drive member that synchronously rotate the first footrest and the second footrest in opposite directions, respectively. The third drive member includes a first gear toothing portion, and the fourth drive member includes a second gear toothing portion. The first gear toothing portion and the second gear toothing portion mesh with each other.

[0393] In one embodiment, the footrest device further includes a second synchronization mechanism, a third pivot shaft, and a fourth pivot shaft. The second synchronization mechanism includes a third drive member and a fourth drive member. The third drive member and the first footrest are rotatably connected to the support member via the third pivot shaft. The fourth drive member and the second footrest are rotatably connected to the support member via the fourth pivot shaft.

[0394] In one embodiment, the footrest device further includes a fixing member disposed between the footrest body and the support member, and when the footrest body is in the folded state, the footrest body can be fixed to one side of the support member via the fixing member.

[0395] In one embodiment, the footrest device further includes a fixed component, the fixed component including a first magnetic member disposed on the footrest body and a second magnetic member disposed on the support member, and when the footrest body is in the folded state, the first magnetic member and the second magnetic member attract each other.

[0396] In one embodiment, the footrest device further includes a fixed component. The fixed component includes a permanent magnet disposed on the footrest body and a rotation shaft disposed on the support member. The support member is rotatably connected to the frame via the rotation shaft. The rotation shaft is made of a ferromagnetic material. When the footrest body is in the folded state, the permanent magnet is attracted to the rotation shaft.

[0397] In one embodiment, the footrest device further includes a support member configured to be connected to the frame, the footrest body being rotatably connected to the support member, and the footrest device also including a connecting member configured to be connected to the frame. The support member is rotatably connected to the connecting member. The support member has a first rotational position and a second rotational position relative to the connecting member. When the support portion is in the first rotational position and the footrest body is in the unfolded state, the footrest body is configured to support a child's feet. When the support portion is in the second rotational position, the support portion is folded toward the frame.

[0398] In one embodiment, the footrest body and the support member are pivotally connected to each other via a third pivot shaft, and the support member and the connecting member are pivotally connected to each other via a rotation axis that is spaced apart from and not parallel to the third pivot shaft.

[0399] In one embodiment, the axis of rotation is perpendicular to the third pivot shaft.

[0400] In one embodiment, the footrest device further includes a second positioning mechanism disposed between the support member and the connecting member, the second positioning mechanism configured to fix the support member in a first rotational position or a second rotational position relative to the connecting member.

[0401] In one embodiment, the footrest device further includes a second positioning mechanism. The second positioning mechanism includes a fourth positioning portion, a fifth positioning portion, and a sixth positioning portion. The fourth positioning portion and the fifth positioning portion are disposed on one of the support member and the connecting member, and the sixth positioning portion is disposed on the other of the support member and the connecting member. When the support member is in the first rotation position, the sixth positioning portion and the fourth positioning portion are locked to each other. When the support member is in the second rotation position, the sixth positioning portion and the fifth positioning portion are locked to each other.

[0402] In one embodiment, the footrest device further includes a second positioning mechanism. The second positioning mechanism includes a third positioning recess, a fourth positioning recess, and a second positioning protrusion. The third positioning recess and the fourth positioning recess are disposed on one of the support member and the connecting member, and the second positioning protrusion is movably disposed on the other of the support member and the connecting member. The second positioning protrusion has a first movement position and a second movement position. When the second positioning protrusion is in the first movement position, the second positioning protrusion can be fitted into the third positioning recess or the fourth positioning recess. When the second positioning protrusion is in the second movement position, the second positioning protrusion can be disengaged from the third positioning recess or the fourth positioning recess.

[0403] In one embodiment, the third positioning recess is a first positioning groove, the fourth positioning recess is a second positioning groove, and the second positioning protrusion is a ball.

[0404] In one embodiment, the second positioning mechanism further includes a positioning reset member disposed between the second positioning protrusion and the support member, the positioning reset member biasing the second positioning protrusion toward the first movement position.

[0405] In one embodiment, the footrest device further includes a second positioning mechanism. The second positioning mechanism includes a fourth positioning portion, a fifth positioning portion, and a sixth positioning portion. The fourth positioning portion and the fifth positioning portion are disposed on one of the support member and the connecting member, and the sixth positioning portion is disposed on the other of the support member and the connecting member. The fourth positioning portion and the fifth positioning portion are configured to be magnetically locked with the sixth positioning portion.

[0406] In one embodiment, the footrest device further includes a support member rotatably connected to the frame. The footrest body is connected to the support member. The support member has a first rotational position and a second rotational position. When the support portion is in the first rotational position and the footrest body is in the unfolded state, the footrest body is configured to support a child's feet. When the support portion is in the second rotational position, the support portion is folded toward the frame.

[0407] In one embodiment, the footrest device further includes a support member and a connecting member. The connecting member is connected to the frame, and the support member is rotatably connected to the connecting member, and the support member has a first rotational position and a second rotational position relative to the connecting member. When the support member is in the first rotational position, the footrest body is configured to support a child's feet. When the support member is in the second rotational position, the footrest body is folded toward the frame.

[0408] In one embodiment, the child transport device further includes a pedal device including a pedal base, a pedal component removably connected to the pedal base, and a third connection mechanism, wherein the pedal component is removably connected to the pedal base via the third connection mechanism.

[0409] In one embodiment, the third connection mechanism includes a first locking portion and a second locking portion. The first locking portion is disposed on one of the pedal component and the pedal base, and the second locking portion is movably disposed on the other of the pedal component and the pedal base. When the first locking portion and the second locking portion are locked to each other, the pedal component and the pedal base are fixedly connected to each other. When the first locking portion and the second locking portion are unlocked from each other, the pedal component can be removed from the pedal base.

[0410] In one embodiment, the third connection mechanism includes a fifth locking groove disposed on the pedal component and a sixth locking member movably disposed on the pedal base. The sixth locking member has a first operating position and a second operating position. When the sixth locking member is in the first operating position, the sixth locking member can be inserted into the fifth locking groove to fixedly connect the pedal component to the pedal base. When the sixth locking member is in the second operating position, the sixth locking member can be separated from the fifth locking groove to separate the pedal component from the pedal base.

[0411] In one embodiment, the pedal component includes a pedal body and a second pin shaft. The pedal body has a second insertion groove. The second pin shaft is partially inserted into the second insertion groove. A fifth locking groove is formed in a portion of the second pin shaft located outside the second insertion groove. The third connection mechanism includes a sixth locking member movably disposed on the pedal base. The sixth locking member has a sixth locking hole. The sixth locking hole has a radial size larger than the radial size of the second pin shaft. The second pin shaft extends through the sixth locking hole, and the fifth locking groove is located corresponding to the sixth locking hole. When the sixth locking member is in the first operating position, a portion of the hole wall of the sixth locking hole is inserted into the fifth locking groove. When the sixth locking member is in the second operating position, a portion of the hole wall of the sixth locking hole is separated from the fifth locking groove.

[0412] In one embodiment, the third connection mechanism further includes a third operating member connected to the sixth locking member, the third operating member operable to switch the sixth locking member between the first operating position and the second operating position.

[0413] In one embodiment, the third connecting mechanism further includes an operation reset member disposed between the third operation member and the pedal base, the operation reset member biasing the sixth locking member toward the first operation position.

[0414] In one embodiment, the pedal base includes a mounting cavity, and the third connection mechanism and at least a portion of the pedal component are disposed within the mounting cavity.

[0415] In one embodiment, the pedal component includes a second pin shaft and a pedal body. The pedal body is provided with a second insertion groove. The second pin shaft is partially inserted into the second insertion groove. The third connection mechanism includes a fifth locking groove in a portion of the second pin shaft located outside the second insertion groove, a third operating member, and a sixth locking member connected to the third operating member and having a first operating position and a second operating position. The third operating member and the sixth locking member are movably disposed within the mounting cavity. The portion of the second pin shaft provided with the fifth locking groove is inserted into the mounting cavity. When the sixth locking member is in the first operating position, the sixth locking member can be inserted into the fifth locking groove, thereby fixedly connecting the pedal component to the pedal base. When the locking member is in the second operating position, the sixth locking member is disengaged from the fifth locking groove, thereby allowing the pedal component to be separated from the pedal base.

[0416] In one embodiment, the sixth locking member is provided with a sixth locking hole. The radial size of the sixth locking hole is larger than the radial size of the second pin shaft. The second pin shaft extends through the sixth locking hole. When the sixth locking member is in the first operating position, a portion of the hole wall of the sixth locking hole is inserted into the fifth locking groove. When the sixth locking member is in the second operating position, a portion of the hole wall of the sixth locking hole is separated from the fifth locking groove.

[0417] In one embodiment, the fourth limiting portion is disposed within the mounting cavity and the fifth limiting portion is disposed on the third operating member, and when the sixth locking member is in the first operating position, the fourth limiting portion abuts the fifth limiting portion.

[0418] In one embodiment, the third motion member includes an actuation portion, and the pedal base includes a third actuation hole communicating with the mounting cavity, the actuation portion operably extending through the third actuation hole from the outer surface of the pedal base.

[0419] In one embodiment, the pedal device further includes an operation reset member, opposite ends of which abut against the third operation member and a cavity wall of the mounting cavity, respectively, and which biases the sixth locking member toward the first operation position.

[0420] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, the embodiments do not describe all possible combinations of the technical features. However, as long as there is no contradiction in the combination of these technical features, the combination should be considered to be within the scope of the present application.

[0421] The above embodiments are merely some embodiments of the present application, and although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present application. Those skilled in the art should understand that various modifications and improvements can be made without departing from the concept of the present application, and all of them are included in the scope of protection of the present application. Therefore, the patent protection of the present application shall belong to the scope of the attached claims.

Claims

1. A child carrier comprising: The front wheel and The rear wheel and a frame having an unfolded state and a folded state; The frame is a first frame connected to the front wheel; a second frame connected to the rear wheel and including a first movable connection; a coupling mechanism including a first connecting frame, a second connecting frame, and a rotating base rotatably connected to the second frame; the first connection frame is rotatably connected to the first frame via a first rotation axis; the first connecting frame includes a third rotation axis, the first movable connecting part is rotatably connected to the third rotation axis, and the relative rotation between the first movable connecting part and the first connecting frame drives the second frame to rotate relative to the rotation base; the second connection frame is connected to the rotation base and rotatably connected to the first frame via a second rotation axis; When the frame switches from the unfolded state to the folded state, the connecting mechanism rotates relative to the first frame and the second frame, and the first frame and the second frame move closer to each other. Children's transport equipment.

2. The first movable connecting portion is provided with a first through hole, a plane in which an opening of the first through hole is located is angled with respect to the third rotation axis; the third rotation shaft extends through the first through-hole, and the third rotation shaft rotates to move the first movable connection part along the third rotation shaft; 10. The child carrier of claim 1.

3. the first movable connection portion includes a universal ball, the universal ball includes a second through hole, the third rotation axis extends through the second through hole, a hole wall of the first through hole forms a ball base configured to receive at least a portion of the universal ball, and the ball base can rotate along a surface of the universal ball; 3. The child carrier of claim 2.

4. the second frame is rotatably connected to the rotation base via a fourth rotation axis; The extension direction of the fourth rotation axis intersects with, but is not perpendicular to, the extension direction of the third rotation axis. A child carrier according to any one of claims 1 to 3.

5. the second frame includes a first wedge-shaped end surface, the rotating base includes a second wedge-shaped end surface, when the second frame rotates relative to the rotating base about the fourth rotation axis, the first wedge-shaped end surface rotates relative to the second wedge-shaped end surface and comes into contact with the second wedge-shaped end surface, and the fourth rotation axis is perpendicular to the first wedge-shaped end surface and the second wedge-shaped end surface.

5. The child carrier of claim 4.

6. the connecting mechanism further includes a connecting rod, the connecting rod including a first connecting end rotatably connected to the first frame and the second connecting frame via the second rotation axis, and a second connecting end connected to the rotation base; A child carrier according to any one of claims 1 to 5.

7. The frame further includes a first locking component, the first locking component including a locking pin connected to the first connecting frame and a locking hook pivotally connected to the second connecting frame and including an engagement hook, the engagement hook being capable of engaging with the locking pin to restrict relative rotation between the first frame and the second frame. A child carrier according to any one of claims 1 to 6.

8. The second connecting frame is provided with a first groove, the engaging hook and the first groove cooperate to surround a third receiving cavity, and the locking pin penetrates the third receiving cavity.

8. The child carrier of claim 7.

9. The first locking component further includes a first reset member, the first reset member biasing the locking hook to rotate into engagement with the locking pin.

9. A child carrier according to claim 7 or 8.

10. The frame further includes an unlocking component configured to drive the locking hook to rotate and disengage from the locking pin, the unlocking component including a first pushing rod movably disposed on the first connecting frame, the first pushing rod operating to rotate the locking hook and disengage from the locking pin. A child carrier according to any one of claims 7 to 9.

11. The unlocking component further includes a drive handle rotatably connected to the first connecting frame and abutting against the first pushing rod, the drive handle including a cam portion, and the drive handle rotates to drive and move the first pushing rod through the cam portion.

11. The child carrier of claim 10.

12. The unlocking component further includes a second reset member disposed between the first connecting frame and the first pushing rod, the second reset member biasing the pushing portion to move in a direction away from the locking hook.

12. A child carrier according to claim 10 or 11.

13. The bicycle frame further includes a handlebar assembly, the handlebar assembly including a handlebar and a locking mechanism, the locking mechanism having a locked state and an unlocked state, when the locking mechanism is in the locked state, the handlebar is restricted to a predetermined position, and when the locking mechanism is in the unlocked state, the handlebar is not restricted to the predetermined position, and when the frame is folded, the locking mechanism switches from the locked state to the unlocked state. A child carrier according to any one of claims 1 to 12.

14. the handlebar assembly further includes a first tension member, the handlebar assembly being connected to the first frame, one end of the first tension member being connected to the locking mechanism, and the other end of the first tension member being connected to the connecting mechanism, and when the frame is switched from the unfolded state to the folded state, the connecting mechanism can drive the locking mechanism to switch from the locked state to the unlocked state.

14. The child carrier of claim 13.

15. the frame further includes a seat assembly secured to the coupling mechanism and a backrest assembly, the frame further including a connection base, the backrest assembly rotatably connected to the connection base, and the seat assembly detachably connected to the connection base; A child carrier according to any one of claims 1 to 14.

16. a backrest assembly detachably connected to the connecting mechanism, the connecting mechanism driving the backrest assembly to fold when the frame is switched from the unfolded state to the folded state; A child carrier according to any one of claims 1 to 15.

17. The device further includes a pusher assembly and a first fixing mechanism, the pusher assembly being detachably connected to the connecting mechanism via the first fixing mechanism. A child carrier according to any one of claims 1 to 16.

18. The first securing mechanism includes a first locking member movably connected to the pusher hand assembly, the first locking member having a first locked position and a first unlocked position, the first locking member engaging with the frame when the first locking member is in the first locked position, and disengaging from the frame when the first locking member is in the first unlocked position, and the first locking member operable to drive the first locking member to switch between the first locked position and the first unlocked position.

18. The child carrier of claim 17.

19. the first locking member is provided with a first locking protrusion, the frame is provided with a first locking hole, and when the first locking member is in the first lock position, the first locking protrusion is fitted into the first locking hole; 20. The child carrier of claim 18.

20. The first securing mechanism further includes a first operating member connected to the first locking member, the first operating member being movably disposed on the pusher assembly, the first operating member being operable to drive the first locking member to switch between the first locked position and the first unlocked position.

20. A child carrier according to claim 18 or 19.

21. The first fixing mechanism further includes a first driving member, one end of the first driving member having a first driving groove, the extension direction of the first driving groove intersecting but not perpendicular to the movement direction of the first operating member, the first locking member having a first driving pin, the first driving pin being insertable into the first driving groove and movable along the first driving groove, the other end of the first driving member being connected to the first operating member, the first operating member being movable in the extension direction of the pusher assembly.

21. The child carrier of claim 20.

22. The first locking member is provided with a first locking protrusion, the frame is provided with a first locking hole, the pusher assembly is provided with a second receiving cavity extending parallel to the extension direction of the pusher assembly, a side wall of the second receiving cavity is provided with a first through hole, the first locking member is disposed in the second receiving cavity, when the first locking member is in the first lock position, the first locking protrusion extends through the first through hole and fits into the first locking hole, the first driving member is inserted into the second receiving cavity, one end of the first driving member is connected to the first locking member, and the other end of the first driving member extends from the second receiving cavity and is connected to the first operating member.

22. The child carrier of claim 21.

23. The first locking mechanism further includes a third reset member disposed between the pusher assembly and the first locking member, the third reset member biasing the first locking member to move toward the first locking position. A child carrier according to any one of claims 18 to 22.

24. The frame is provided with a push rod mounting base, and the push rod mounting base is provided with a first mounting groove, a part of the push hand assembly connected to the first locking member is inserted into the first mounting groove, and the first driving member can engage with a groove wall of the first mounting groove. A child carrier according to any one of claims 18 to 23.

25. a first locking protrusion is provided on the first locking member, a first locking hole is provided on the groove wall of the first mounting groove, and when the first locking member is in the first lock position, the first locking protrusion is fitted into the first locking hole; 25. The child carrier of claim 24.

26. The pusher assembly includes a first connecting rod connected to the frame, a second connecting rod detachably connected to the first connecting rod, and a length adjustment mechanism, the length adjustment mechanism having a locked state and an unlocked state, and when the length adjustment mechanism is in the unlocked state, the second connecting rod can move in the extension direction of the first connecting rod to extend or retract the pusher assembly, and when the length adjustment mechanism is in the locked state, the second connecting rod and the first connecting rod are fixed to each other. A child carrier according to any one of claims 17 to 25.

27. the length adjustment mechanism includes a second locking member having a second locked position and a second unlocked position, the second locking member being operable to be switched between the second locked position and the second unlocked position, the first connecting rod being provided with at least two second locking holes, the second locking member being movably disposed on the second connecting rod, the second locking member being engageable with any one of the second locking holes when the second locking member is in the second locked position, and the second locking member being disengaged from the second locking holes when the second locking member is in the second unlocked position; 27. The child carrier of claim 26.

28. The length adjustment mechanism further includes a second operating member movably disposed on the pusher hand assembly and connected to the second locking member, the second operating member being drivable to switch the second locking member between the second locked position and the second unlocked position.

28. The child carrier of claim 27.

29. the length adjustment mechanism further includes a second drive member, one of the second drive member and the second operating member having a second drive groove, the other of the second drive member and the second operating member having a second drive pin, the extension direction of the second drive groove intersecting but not perpendicular to the movement direction of the second operating member, the second drive pin being insertable into the second drive groove and movable along the second drive groove; one of the second drive member and the second locking member having a third drive groove, the other of the second drive member and the second locking member having a third drive pin, the extension direction of the third drive groove intersecting but not perpendicular to the movement direction of the second operating member, the third drive pin being insertable into the third drive groove and movable along the third drive groove, the second drive groove being spaced apart from the third drive groove; 29. The child carrier of claim 28.

30. the first connecting rod has a hollow end, the second connecting rod is inserted into the hollow end, the second connecting rod is provided with a third receiving cavity extending parallel to an extension direction of the second connecting rod, the second connecting rod is provided with a second through hole, the second through hole penetrates a side wall of the third receiving cavity, the second locking member is at least partially disposed within the third receiving cavity, and when the second locking member is in the second lock position, at least a portion of the second locking member extends through the second through hole and engages with one of the second locking holes; A child carrier according to any one of claims 27 to 29.

31. the first connecting rod has a hollow end, the second connecting rod is inserted into the hollow end, the second connecting rod is provided with a third receiving cavity extending parallel to an extension direction of the second connecting rod, the length adjustment mechanism further includes a guide base, the guide base is disposed in the third receiving cavity, the guide base includes a first receiving groove, a second receiving groove, and an elongated hole passing through the first receiving groove and the second receiving groove, the extension direction of the first receiving groove and the extension direction of the second receiving groove respectively intersect with the extension direction of the second receiving groove, the second locking member is movably inserted into the first receiving groove, a driving connection portion of the second driving member is movably inserted into the second receiving groove, and the third pin shaft extends through the elongated hole to connect the second locking member and the driving connection portion of the second driving member.

30. A child carrier according to claim 29, or optionally a combination of claims 28 and 29.

32. The length adjustment mechanism further includes a fourth reset member disposed between the second drive member and the pusher assembly, the fourth reset member biasing the second drive member to move in a direction that moves the second lock member to the second lock position. A child carrier according to any one of claims 29 to 31.

33. 1. A handlebar assembly comprising: At least two handlebars with multiple use heights; a first synchronization mechanism disposed between the at least two handlebars; the at least two handlebars are configured to be synchronously switched to different use heights via the first synchronization mechanism; Handlebar assembly.

34. the at least two handlebars include a first handlebar and a second handlebar, the first handlebar including a first connecting portion and a first holding portion, the second handlebar including a second connecting portion and a second holding portion, the first connecting portion and the second connecting portion being rotatably connected to each other, the first synchronization mechanism being disposed between the first connecting portion and the second connecting portion, and the first synchronization mechanism causing the first connecting portion and the second connecting portion to rotate synchronously in opposite directions to each other, thereby synchronously adjusting the use heights of the first holding portion and the second holding portion; 34. A handlebar assembly according to claim 33.

35. the first synchronizing mechanism includes a first drive element and a second drive element drivingly connected to the first drive element, the first drive element drivingly connected to the first handlebar, and the second drive element drivingly connected to the second handlebar.

35. A handlebar assembly according to claim 34.

36. The first handlebar is an L-shaped rod or an arc-shaped rod, and the first connecting portion and the first holding portion are respectively disposed on both ends of the first handlebar, and the second handlebar is an L-shaped rod or an arc-shaped rod, and the second connecting portion and the second holding portion are respectively disposed on both ends of the second handlebar. A handlebar assembly according to claim 34, or optionally a combination of claims 34 and 35.

37. The at least two handlebars each include a first handlebar including a first mating ring and a second handlebar including a second mating ring, the first mating ring having a first internal gear portion in a circumferential direction, the second mating ring having a second internal gear portion in a circumferential direction, the first synchronizing mechanism including a first external gear and a second external gear, the first external gear meshing with the first internal gear portion, and the second external gear meshing with the second internal gear portion. A handlebar assembly according to any one of claims 33 to 36.

38. The first mating ring and the second mating ring overlap to form a receiving cavity, and the first external gear and the second external gear are both disposed within the receiving cavity.

38. A handlebar assembly according to claim 37.

39. the support base further includes a support member connected to the frame, the support base including a mounting member having a first pivot shaft and a second pivot shaft spaced apart from each other, the first external gear and the second external gear being rotatably connected to the first pivot shaft and the second pivot shaft, respectively, and the first mating ring and the second mating ring being rotatable with respect to the mounting member; 39. A handlebar assembly according to claim 38.

40. The bicycle further includes a locking mechanism having a locked state and an unlocked state, wherein when the locking mechanism is in the locked state, the at least two handlebars are locked at one of the use heights, and when the locking mechanism is in the unlocked state, the at least two handlebars can be switched to another one of the use heights. A handlebar assembly according to any one of claims 33 to 39.

41. the at least two handlebars include a first handlebar and a second handlebar; the locking mechanism includes a push button movable between a first position and a second position; one of the first handlebar and the push button includes a first locking groove; the other of the first handlebar and the push button includes a first locking portion; one of the second handlebar and the push button includes a second locking groove; and the other of the second handlebar and the push button includes a second locking portion; when the push button is at the first position, the first locking portion and the second locking portion are engaged with the first locking groove and the second locking groove, respectively; and when the push button is at the second position, the first locking portion and the second locking portion are disengaged from the first locking groove and the second locking groove, respectively.

41. A handlebar assembly according to claim 40.

42. a third lock groove is further provided on one of the second handle bar and the push button, and a third lock portion is further provided on the other of the second handle bar and the push button, the third lock portion being engaged with the third lock groove when the push button is in the first position, and the third lock portion being disengaged from the third lock groove when the push button is in the second position; 42. A handlebar assembly according to claim 41.

43. The locking mechanism further includes a push button reset member, the push button reset member biasing the push button to move toward the first position.

43. A handlebar assembly according to claim 41 or 42.

44. the push button includes a second push rod and a lock rod, an angle being formed between the second push rod and the lock rod, the lock rod being an L-shaped bar including a first rod and a second rod arranged at an angle to each other, one end of the first rod remote from the second rod being connected to the second push rod, the second push rod having an engagement end, when the push button is in the first position, the first mating ring and the second mating ring are located between the second rod and the engagement end, the second rod forms the first locking portion, and the engagement end forms the second locking portion; A handlebar assembly according to any one of claims 41 to 43.

45. The frame and a handlebar assembly according to any one of claims 33 to 44 attached to the frame. Children's transport equipment.

46. a backrest assembly; an armrest assembly connected to the backrest assembly and having an unfolded state and a folded state; a first positioning mechanism disposed between the backrest assembly and the armrest assembly; When the armrest assembly is in the unfolded state, the first positioning mechanism fixes the armrest assembly in a first position relative to the backrest assembly, and when the armrest assembly is in the folded state, the first positioning mechanism fixes the armrest assembly in a second position relative to the backrest assembly. Children's transport equipment.

47. the first positioning mechanism includes a first positioning portion and a second positioning portion disposed on one of the backrest assembly and the armrest assembly, and a third positioning portion disposed on the other of the backrest assembly and the armrest assembly, wherein when the armrest assembly is in the unfolded state, the third positioning portion is locked with the first positioning portion to fix the armrest assembly in the first position relative to the backrest assembly, and when the assembly is in the folded state, the third positioning portion is locked with the second positioning portion to fix the armrest assembly in the second position relative to the backrest assembly.

47. The child carrier of claim 46.

48. The first positioning mechanism includes: a first positioning recess and a second positioning recess spaced apart on the backrest assembly; a first positioning protrusion movably disposed on the armrest assembly; Including, When the armrest assembly is in the unfolded state, the first positioning protrusion is inserted into the first positioning recess to fix the armrest assembly in the first position relative to the backrest assembly, and when the armrest assembly is in the folded state, the first positioning protrusion is inserted into the second positioning recess to fix the armrest assembly in the second position relative to the backrest assembly.

48. A child carrier according to claim 46 or 47.

49. the first positioning protrusion is a ball, and the first positioning recess and the second positioning recess are partially spherical holes that can be fitted with the ball; 49. The child carrier of claim 48.

50. the first positioning protrusion has a locking position, and when the first positioning protrusion is in the locking position, the first positioning protrusion is inserted into the first positioning recess or the second positioning recess; the first positioning mechanism further includes a fifth reset member disposed between the first positioning protrusion and the armrest assembly, and the fifth reset member biases the first positioning protrusion to move toward the locking position.

50. A child carrier according to claim 48 or 49.

51. the backrest assembly includes a mounting base and a fixed base rotatably connected to the mounting base, the armrest assembly is fixedly connected to the fixed base, the first positioning mechanism includes a first positioning recess, a second positioning recess, and a first positioning protrusion, the first positioning recess and the second positioning recess are spaced apart on the mounting base, the first positioning protrusion is movably disposed on the mounting base, when the armrest assembly is in the unfolded state, the first positioning protrusion is inserted into the first positioning recess to fix the armrest assembly at the first position relative to the backrest assembly, and when the armrest assembly is in the folded state, the first positioning protrusion is inserted into the second positioning recess to fix the armrest assembly at the second position relative to the backrest assembly. A child carrier according to any one of claims 46 to 50.

52. the first positioning mechanism further includes a fifth reset member disposed in the accommodating groove, and both ends of the fifth reset member abut against the first positioning protrusion and a bottom of the accommodating groove, respectively; 52. The child carrier of claim 51.

53. the backrest assembly further includes a connection base rotatably connected to the backrest assembly, the fixed base rotatably connected to the mounting base, the connection base including a third housing and a fourth housing fixedly connected to each other, the mounting base rotatably connected to the fourth housing, the mounting base, the third housing, and the fourth housing enclose a fourth accommodating cavity, the first positioning recess and the second positioning recess are both arranged on a side of the mounting base facing the fourth housing, the fourth housing is provided with a mounting opening therethrough, the fixed base is provided with a mounting boss, the mounting boss is provided with an accommodating groove, the first positioning protrusion is movably arranged within the accommodating groove and is movable to be partially outside the accommodating groove, and the mounting boss extends partially through the mounting opening and partially into the fourth accommodating cavity.

53. A child carrier according to claim 51 or 52.

54. When the armrest assembly is in an intermediate state between the unfolded state and the folded state, the first positioning mechanism fixes the armrest assembly in a third position relative to the backrest assembly. A child carrier according to any one of claims 46 to 53.

55. The backrest assembly includes a backrest body and a fixed base rotatably connected to the backrest body, the fixed base is fixedly connected to the armrest assembly, and the armrest body is detachably connected to the fixed base. A child carrier according to any one of claims 46 to 54.

56. The armrest further includes a first locking mechanism, the first locking mechanism including a third locking member movably arranged on one of the armrest body and the fixed base, and a third locking hole movably arranged on the other of the armrest body and the fixed base, the third locking member is capable of being locked in the third locking hole; 56. The child carrier of claim 55.

57. The armrest further includes a first locking mechanism, the first locking mechanism including a third locking member and a third locking hole disposed in a fixed base, the third locking member pivotally connected to the armrest body at a first pivot point, the third locking member including a first operating end and a first locking end, the first pivot point being disposed between the first operating end and the first locking end, the first locking end being insertable into the third locking hole, and the first operating end being operable to separate the first locking end from the third locking hole.

57. A child carrier according to claim 55 or 56.

58. The first locking mechanism further includes a sixth reset member disposed between the first operating end and the armrest body, and the sixth reset member biases the first locking end so as to rotate in a direction in which the first locking end is inserted into the third locking hole.

58. The child carrier of claim 57.

59. the armrest assembly includes an armrest body, a first armrest rod, and a second armrest rod, the first armrest rod and the second armrest rod being connected to opposite ends of the armrest body, respectively, and connected to opposite sides of the backrest assembly, the first positioning mechanism being disposed between the first armrest rod and the backrest assembly, and between the second armrest rod and the backrest assembly; A child carrier according to any one of claims 46 to 58.

60. a frame; and an adjustment mechanism disposed between the frame and the backrest assembly, the backrest assembly being connected to the frame, the adjustment mechanism selectively restricting or allowing relative rotation between the backrest assembly and the frame.

60. A child carrier according to any one of claims 46 to 59.

61. the adjustment mechanism includes a second locking component having a locked state in which the relative rotation between the backrest assembly and the frame is restricted and an unlocked state in which the relative rotation between the backrest assembly and the frame is not restricted, and an operating component connected to the second locking component and operable to switch the second locking component between the locked state and the unlocked state.

61. The child carrier of claim 60.

62. The backrest assembly further includes a mounting base fixedly connected to the frame, and the second locking component includes a limiting hole provided in the mounting base and a limiting pin movably disposed on the backrest assembly, the limiting pin being insertable into the limiting hole.

62. The child carrier of claim 61.

63. At least two limiting holes are provided, and the limiting pin can be inserted into different limiting holes to fix the backrest assembly at different relative angles to the frame.

63. The child carrier of claim 62.

64. the operating component includes an unlocking member and a second tensioning member, both ends of the second tensioning member being connected to the unlocking member and the second locking component, respectively, and the unlocking member being operable to drive the second locking component via the second tensioning member to switch from the locked state to the unlocked state; 64. A child carrier according to any one of claims 61 to 63.

65. The operating component further includes a seventh reset member, the seventh reset member biasing the second tension member in a direction to drive the second lock component to the locked state.

65. The child carrier of claim 64.

66. a frame removably connected to a backrest assembly, the backrest assembly further including a connection base, the backrest assembly being removably connected to the frame via the connection base; A child carrier according to any one of claims 46 to 65.

67. a second locking mechanism including a first locking element disposed on the connection base and a second locking element disposed on the frame, the first locking element being lockable with or unlockable from the second locking element; 67. The child carrier of claim 66.

68. a second locking mechanism including a fourth locking member movably disposed on the connection base and a fourth locking hole disposed on the frame, wherein the fourth locking member is lockable with or unlockable from the fourth locking hole; 68. A child carrier according to claim 66 or 67.

69. the fourth locking member is pivotally connected to the connection base at a second pivot point, the fourth locking member including a second operating end and a second locking end, the second pivot point being disposed between the second operating end and the second locking end, the second locking end being insertable into the fourth locking hole, and the second operating end being operable to separate the second locking end from the fourth locking hole; 69. The child carrier of claim 68.

70. the connecting base includes a third housing and a fourth housing, the third housing and the fourth housing cooperatively surrounding a fifth accommodating cavity, the fourth locking member is disposed in the fifth accommodating cavity, the third housing is provided with a through hole, the second locking end is insertable through the through hole into the fourth locking hole, the fourth housing is provided with a second operating hole, and the second operating end at least partially protrudes from an outer surface of the fourth housing through the second operating hole; 70. A child carrier according to claim 68 or 69.

71. The second locking mechanism further includes an eighth reset member disposed between the second operating end and the connection base, and the eighth reset member biases the second operating end to move in a direction that drives the second locking end to lock into the fourth locking hole.

71. A child carrier according to claim 69, or optionally a combination of claims 69 and 70.

72. One of the frame and the backrest assembly has a guide boss, and the other of the frame and the backrest assembly has a guide groove, and the guide boss is insertable into the guide groove.

72. A child carrier according to any one of claims 66 to 71.

73. An insertion opening is provided on a side wall of the guide groove, and the guide boss can be inserted into the guide groove through the insertion opening. A guide hole is provided in the guide boss, and a guide rib is provided on a bottom surface of the guide groove. When the guide boss is inserted into the guide groove, the guide rib is inserted into the guide hole.

73. The child carrier of claim 72.

74. A footrest device, comprising: The footrest device includes a support member configured to be connected to a frame, the support member being switchable between a first rotation position and a second rotation position, and when the support member is switched from the first rotation position to the second rotation position, the support member is folded in a direction approaching the frame, the footrest device also includes a footrest component configured to be pivotally or detachably connected to the support member, and when the footrest component is pivotally connected to the support member, the footrest component is switchable between an unfolded state and a folded state, and when the footrest component is in the unfolded state, a footrest component configured to support a child's foot, wherein when the footrest component is in the folded state, the footrest component is folded toward the support member, the footrest device has an in-use state and an in-use state, and when the footrest device is in the in-use state, the support member is in the first rotational position and the footrest component is in the unfolded state or attached to the support member, and when the footrest device is in the in-use state, the support member is in the second rotational position and the footrest component is in the folded state or detached from the support member; Footrest device.

75. the footrest component includes a footrest body supporting the child's feet and a first pin shaft connected to the footrest body, one end of the first pin shaft being provided with a fourth locking groove in the circumferential direction, and the footrest device further includes a second fixing mechanism; the second fixing mechanism includes a fifth locking member movably disposed on the support member and switchable between a first locking position and a first unlocking position, the fifth locking member is provided with a fifth locking hole, and the fifth locking hole has a radial size larger than a radial size of the first pin shaft; the second fixing mechanism also includes a lock reset member disposed between the fifth locking member and the support member and configured to bias the fifth locking member to move to the first locking position; an end of the first pin shaft provided with the fourth locking groove is insertable into the support member and configured to extend through the fifth locking hole, and when the fifth locking member is in the first locking position, a hole wall of the fifth locking hole is inserted into the fourth locking groove; 75. A footrest device according to claim 74.

76. At least a portion of the fifth locking member protrudes from the support member, and the portion of the fifth locking member protruding from the support member is operable to move from the first locked position to the first unlocked position, or when an end of the first pin shaft provided with the fourth locking groove is inserted into the support member, the first pin shaft is drivable to move the fifth locking member from the first locked position to the first unlocked position.

76. A footrest device according to claim 75.

77. the first pin shaft is partially inserted into the footrest component, an end of the first pin shaft provided with the fourth locking groove protrudes from the footrest component, and an extension direction of the first pin shaft intersects with a movement direction of the fifth locking member; 77. A footrest device according to claim 75 or 76.

78. The support member further includes a connecting member fixedly connected to the frame, the supporting member being pivotally connected to the connecting member. A footrest device according to any one of claims 74 to 77.

79. the second positioning mechanism further includes a fourth positioning portion, a fifth positioning portion, and a sixth positioning portion, the fourth positioning portion and the fifth positioning portion being disposed on one of the support member and the connecting member, and the sixth positioning portion being disposed on the other of the support member and the connecting member, and the sixth positioning portion and the fourth positioning portion being locked to each other when the support member is in the first rotation position, and the sixth positioning portion and the fifth positioning portion being locked to each other when the support member is in the second rotation position; 79. A footrest device as claimed in claim 78.

80. the second positioning mechanism further includes a third positioning recess, a fourth positioning recess, and a second positioning protrusion, the third positioning recess and the fourth positioning recess are disposed on one of the support member and the connecting member, the second positioning protrusion is movably disposed on the other of the support member and the connecting member, the second positioning protrusion has a first movement position and a second movement position, when the second positioning protrusion is in the first movement position, the second positioning protrusion is engaged with the third positioning recess or the fourth positioning recess, and when the second positioning protrusion is in the second movement position, the second positioning protrusion is disengaged from the third positioning recess or the fourth positioning recess; 80. A footrest device according to claim 78 or 79.

81. the third positioning recess and the fourth positioning recess are a first positioning groove and a second positioning groove, respectively, and the second positioning protrusion is a ball; 81. A footrest device according to claim 80.

82. the second positioning mechanism further includes a positioning reset member disposed between the second positioning protrusion and the support member, the positioning reset member biasing the second positioning protrusion to move toward the first movement position; 82. A footrest device according to claim 80 or 81.

83. the support member includes a support body configured to be connected to the footrest component, and a first pivot portion protruding from the support body and including a first side surface, the first side surface being provided with a third positioning recess and a fourth positioning recess; the connecting member includes a second pivot portion rotatably connected to the first pivot portion via a rotation axis, the second pivot portion including a second side surface opposing the first side surface, the second side surface being provided with a second mounting groove; the second positioning protrusion is movably disposed in the second mounting groove, and when the second positioning protrusion is in the first movement position, at least a portion of the second positioning protrusion protrudes from the second mounting groove and engages with the third positioning recess or the fourth positioning recess; and when the second positioning protrusion is in the second movement position, the second positioning protrusion retracts into the second mounting groove and disengages from the third positioning recess or the fourth positioning recess. A footrest device according to any one of claims 80 to 82.

84. the third positioning recess and the fourth positioning recess are arranged around the rotation shaft, and an extension direction of the second mounting groove is substantially parallel to a longitudinal direction of the rotation shaft.

84. A footrest device as claimed in claim 83.

85. the support member includes two first pivot portions arranged opposite to each other, the two first pivot portions being rotatably connected to two side surfaces of the second pivot portion via two rotation axes, the second mounting grooves being arranged on two second side surfaces of the second pivot portion opposite to the two first pivot portions, and two second positioning mechanisms being provided, each of the two second positioning mechanisms being arranged between the second pivot portion and one of the two corresponding first pivot portions; 85. A footrest device according to claim 83 or 84.

86. the second positioning mechanism further includes a fourth positioning portion, a fifth positioning portion, and a sixth positioning portion, the fourth positioning portion and the fifth positioning portion being disposed on one of the support member and the connecting member, and the sixth positioning portion being disposed on the other of the support member and the connecting member, and the fourth positioning portion and the fifth positioning portion being configured to be magnetically locked with the sixth positioning portion. A footrest device according to any one of claims 78 to 85.

87. and a second synchronization mechanism including a third drive member and a fourth drive member drivingly connected to the third drive member, the footrest components including a first footrest connected to the third drive member and a second footrest connected to the fourth drive member, the first footrest and the second footrest being pivotally connected to opposite sides of the support member. A footrest device according to any one of claims 74 to 86.

88. the third drive member includes a first gear toothing portion, and the fourth drive member includes a second gear toothing portion, the first gear toothing portion and the second gear toothing portion being intermeshing with each other; 88. A footrest device as described in claim 87.

89. a third pivot shaft rotatably connected to the support member, and a fourth pivot shaft rotatably connected to the support member, wherein the third drive member and the first footrest are fixedly connected to the third pivot shaft, and the fourth drive member and the second pedal are fixedly connected to the third pivot shaft.

89. A footrest device according to claim 87 or 88.

90. the footrest component is pivotally connected to the support member, and the footrest device further includes a fixed component, the fixed component including a first magnetic member disposed on the footrest component and a second magnetic member disposed on the support member, and when the pedal body is in the folded state, the first magnetic member and the second magnetic member attract each other. A footrest device according to any one of claims 74 to 89.

91. The pedal body further includes a fixed component, the fixed component including a permanent magnet disposed on the footrest component and a rotation shaft, the support member being rotatably connected to the frame via the rotation shaft, the rotation shaft being made of a ferromagnetic material, and when the pedal body is in the folded state, the permanent magnet is attracted to the rotation shaft, and the footrest component being rotatably connected to the support member. A footrest device according to any one of claims 74 to 90.

92. The frame and and a footrest device according to any one of claims 74 to 91. Children's transport equipment.

93. further comprising a pedal device; the pedal device includes a pedal component, a pedal base connected to a wheel assembly, and a third fixing mechanism, the pedal component being detachably connected to the pedal base via the third fixing mechanism; 93. The child carrier of claim 92.

94. the pedal component has a fifth locking groove, the third fixing mechanism includes a sixth locking member movably disposed on the pedal base, the sixth locking member has a first operating position and a second operating position, when the sixth locking member is in the first operating position, the sixth locking member is inserted into the fifth locking groove and fixedly connects the pedal component to the pedal base, and when the sixth locking member is in the second operating position, the sixth locking member is separated from the fifth locking groove and the pedal component can be separated from the pedal base; 94. The child carrier of claim 93.

95. the pedal component includes a pedal body and a second pin shaft connected to each other, the second pin shaft having a fifth lock groove; the third fixing mechanism includes a sixth locking member movably disposed on the pedal base, the sixth locking member having a sixth locking hole, the sixth locking hole having a radial size larger than the radial size of the second pin shaft, the second pin shaft extending through the sixth locking hole, the fifth locking groove being located at a position corresponding to the sixth locking hole; the sixth locking member has a first operating position and a second operating position, and when the sixth locking member is in the first operating position, a portion of a hole wall of the sixth locking hole is inserted into the fifth locking groove, and when the sixth locking member is in the second operating position, a portion of a hole wall of the sixth locking hole is separated from the fifth locking groove; 95. A child carrier according to claim 93 or 94.

96. The third locking mechanism further includes a third operating member fixedly connected to the sixth locking member, the third locking mechanism operative to allow the sixth locking member to move from the first operating position to the second operating position, and the third locking mechanism also includes an operating reset member disposed between the third operating member and the pedal base, the operating reset member biasing the third operating member to drive the sixth locking member to move to the first operating position.

96. The child carrier of claim 95.

97. The pedal base further includes a wheel assembly rotatably connected to the frame, the pedal base including a fifth housing connected to the wheel assembly, the fifth housing having a fourth receiving groove and a receiving boss, the receiving boss having a fourth receiving cavity extending therethrough, the fourth receiving groove having an insertion hole in a first groove wall thereof, the fourth receiving cavity communicating with the fourth receiving groove via the insertion hole, the pedal base also including a sixth housing having a third operating hole and a fourth receiving groove spaced therefrom, the fifth housing and the sixth housing being connected to each other to form a mounting cavity, the fourth receiving groove and the receiving boss are disposed within the mounting cavity, the receiving boss extends through the mounting hole and protrudes from an outer surface of the sixth housing, at least a portion of the second pin shaft is inserted into the fourth receiving cavity, the sixth locking member and at least a portion of the third operating member are movably disposed within the mounting cavity, at least a portion of the sixth locking member is inserted into the fourth receiving cavity through the insertion hole and is inserted into and separated from the fifth locking groove of the second pin shaft, and at least a portion of the third operating member protrudes outward from the mounting cavity through the third operating hole.

97. The child carrier of claim 96.

98. the first groove wall forms a fourth limiting portion, the third operating member has a fifth limiting portion, and when the sixth locking member is in the first operating position, the fourth limiting portion abuts against the fifth limiting portion.

98. The child carrier of claim 97.

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