Frame, seat locking device, and stroller

Abstract

A stroller is disclosed. The stroller includes a frame. The frame includes a first wheel frame including a first support assembly, a second wheel frame including a second support assembly, a pressure rod frame including a pressure rod assembly, and a folding mechanism including a connecting assembly and a rotating shaft. The first support assembly, the second support assembly, and the pressure rod assembly are pivotably connected via the rotating shaft. The first support assembly and the second support assembly are rotatable and foldable relative to the pressure rod assembly via the connecting assembly.

Description

Technical Field

[0001] This application relates to the technical field of child carriers, and particularly to frames, seat locking devices, and baby strollers.

Background Art

[0002] (Cross-reference to related applications) This application claims priority to Chinese Patent Application No. 2023104054809 filed on April 14, 2023, Chinese Patent Application No. 2023104051586 filed on April 14, 2023, and Chinese Patent Application No. 2024104188121 filed on April 8, 2024, the contents of which are hereby incorporated by reference in their entirety. Currently, baby strollers with a high view are becoming increasingly popular among consumers. Such baby strollers can provide children with a better view. However, in this type of baby stroller with a high view, it is inconvenient to fold the entire frame. Furthermore, in order to improve the riding comfort of children, the seat of this type of baby stroller needs to be reversible forward or backward. In addition, in order to meet the needs of cleaning, storage, or transportation, the seat and frame of the baby stroller need to be detachable. In current baby strollers, there is a problem that the reversing structure for reversing the seat forward or backward is complex and difficult to operate.

Summary of the Invention

[0003] According to various embodiments of the present application, a frame, a seat locking device, and a baby stroller are provided.

[0004] According to one aspect of the present invention, a stroller is provided. The stroller includes a frame. The frame includes a first wheel frame including a first support assembly, a second wheel frame including a second support assembly, a pressure rod frame including a pressure rod assembly, and a folding mechanism including a connecting assembly and a rotating shaft. The first and second support assemblies and the pressure rod assembly are pivotably connected via a rotating shaft. The first and second support assemblies are rotatably foldable relative to the pressure rod assembly via a connecting assembly. The connecting assembly includes a first connecting rod, a second connecting rod, and a third connecting rod. The first end of the first connecting rod is rotatably connected to the pressure rod assembly. The first end of the second connecting rod is rotatably connected to the second end of the first connecting rod, and the second end of the second connecting rod is rotatably connected to the first support assembly. The first end of the third connecting rod is rotatably connected to the second end of the first connecting rod, and the second end of the third connecting rod is rotatably connected to the second support assembly.

[0005] In one embodiment, the pressing rod frame further includes a handle assembly, and the folding mechanism further includes a release assembly that is drivenly connected to the handle assembly. The handle assembly is operable to release the release assembly, thereby allowing the first support assembly and the second support assembly to rotate and fold relative to the pressing rod assembly via the connecting assembly.

[0006] In other aspects of the present invention, a frame is provided. The frame includes a first wheel frame, a second wheel frame, a press rod frame pivotably connected to the first and second wheel frames and including a handle assembly, and a folding mechanism including a release assembly pivotably connected to the handle assembly. The handle assembly is operable to drive to release the release assembly, thereby causing the first wheel frame, the second wheel frame and the press rod frame to rotate and fold by the folding mechanism.

[0007] In one embodiment, the first wheel frame includes a first support assembly, and the second wheel frame includes a second support assembly. The pressure rod frame includes a pressure rod assembly. The first and second support assemblies and the pressure rod assembly are pivotally connected by a rotating shaft. The folding mechanism includes a connecting assembly. The first and second support assemblies are movably connected to the pressure rod assembly via the connecting assembly. The first and second support assemblies are rotatably foldable relative to the pressure rod assembly via the connecting assembly.

[0008] In one embodiment, the connecting assembly includes a first connecting rod, a second connecting rod, and a third connecting rod. The first end of the first connecting rod is rotatably connected to the pressing rod assembly. The first end of the second connecting rod is rotatably connected to the second end of the first connecting rod, and the second end of the second connecting rod is rotatably connected to the first support assembly. The first end of the third connecting rod is rotatably connected to the second end of the first connecting rod, and the second end of the third connecting rod is rotatably connected to the second support assembly.

[0009] In one embodiment, the coupling assembly includes a sun gear fixed to a press rod assembly, a rotating plate fixed to a first support assembly and having a first guide groove, the first guide groove including a toothed edge, a planetary gear that meshes with the sun gear and the toothed edge, and a drive shaft positioned eccentrically with respect to the rotating shaft and extending through a second support assembly, the planetary gear and the press rod assembly. The second support assembly is pivotably connected to the press rod assembly by the drive shaft.

[0010] In one embodiment, the drive shaft is fixedly connected to the second support assembly and the planetary gear, and is rotatable relative to the pressing rod assembly.

[0011] In one embodiment, the toothed edge is arc-shaped and arranged along the circumferential direction of the rotating plate.

[0012] In one embodiment, the toothed rim includes a first end and a second end, and restricts the movement of the planetary gear between the first end and the second end.

[0013] In one embodiment, the first support assembly includes a first rotating base. The second support assembly includes a second rotating base. The pressing rod assembly includes a pivot base. The first rotating base, the second rotating base, and the pivot base are pivotably connected via a rotating shaft.

[0014] In one embodiment, the first wheel frame includes two first support assemblies facing each other. The second wheel frame includes two second support assemblies facing each other. The pressure rod frame includes a pressure rod assembly. The two first support assemblies, the two second support assemblies, and the pressure rod assembly are pivotably connected by a rotating shaft. The folding mechanism includes two connecting assemblies. Each first support assembly and each second support assembly is movably connected to the pressure rod assembly by their respective connecting assemblies. Each first support assembly and each second support assembly is rotatably foldable relative to the pressure rod assembly by their respective connecting assemblies.

[0015] In one embodiment, each first support assembly includes a first rotating base. Each second support assembly includes a second rotating base. The pressing rod assembly includes a pivot base. The two first rotating bases are pivotably connected to each other on either side of the pivot base. The two second rotating bases are pivotably connected by a rotating shaft to the side of the two first rotating bases away from the pivot base.

[0016] In one embodiment, the first support assembly includes a first rotating base with a locking recess. The unlocking assembly includes a locking member. When the locking member is in the locked state, it is inserted into the locking recess so that the press rod assembly and the first support assembly are fixed to each other. When the unlocking assembly is in the unlocked state, the locking member is separated from the locking recess so that the press rod assembly is rotatable relative to the first support assembly.

[0017] In one embodiment, the unlocking assembly further includes a drive member disposed on the pressing rod assembly and drivenly connected to the handle assembly, and a tension member. Both ends of the tension member are connected to the drive member and the locking member, respectively. The handle assembly is operable to drive the drive member to move and to drive the tension member to separate the locking member from the locking recess.

[0018] In one embodiment, the handle assembly includes a handle body and a handle portion rotatably disposed on the handle body. The drive member is connected to the handle portion and is rotatable together with the handle portion.

[0019] In one embodiment, the unlocking assembly further includes a first reset member. Both ends of the first reset member abut against the locking member and the pressing rod assembly, respectively. The first reset member is adapted to bias the locking member to move in the direction toward insertion into the locking recess.

[0020] In one embodiment, the unlocking assembly further includes a safety unlocking member that is movable between a first position and a second position. When the safety unlocking member is in the first position, the handle portion cannot be driven to move the drive member even when operated. When the safety unlocking member is in the second position, the handle portion can be driven to move the drive member when operated.

[0021] In one embodiment, the unlocking assembly further includes a limiting member movably positioned on the press rod frame. When the safety unlocking member is in a first position, the limiting member restricts the movement of the drive member. When the safety unlocking member is in a second position, the limiting member does not restrict the movement of the drive member, and the safety unlocking member is operable to move from the first position to the second position.

[0022] In one embodiment, the unlocking assembly further includes a second resetting member. Both ends of the second resetting member abut against the drive member and the limiting member, respectively. The second resetting member is adapted to bias the limiting member to move in a direction that restricts the movement of the drive member.

[0023] In one embodiment, the handle assembly includes two handle sections and a handle body. The two handle sections are rotatably positioned on the handle body. The unlocking assembly further includes two drive members and two tension members, which are positioned on a pressing rod frame and are respectively drastically connected to the two handle sections. Both ends of each tension member are connected to one drive member and one lock member, respectively. Either handle section is operable to drive the corresponding drive member to move, and the corresponding tension member drives the lock member to separate from the lock recess.

[0024] In one embodiment, the unlocking assembly further includes a safety unlocking member that is movable between a first position and a second position. Two second positions are provided, with the first position located between the two second positions. When the safety unlocking member is in the first position, neither handle portion can be driven to move the drive member when operated. When the safety unlocking member is in either of the second positions, one of the handle portions, when operated, drives the corresponding drive member to move.

[0025] In one embodiment, the unlocking assembly further includes two restricting members movably positioned on the press rod frame. When the safety unlocking member is in the first position, the two restricting members each restrict the movement of two drive members. When the safety unlocking member is in either of the second positions, one of the restricting members does not restrict the movement of the other drive member, and the safety unlocking member is operable to move from the first position to the second position.

[0026] In one embodiment, the unlocking assembly further includes two second resetting members. Both ends of each second resetting member abut against one drive member and one limiting member, respectively. Each second resetting member is adapted to bias the corresponding limiting member to move in a direction that restricts the movement of the corresponding drive member.

[0027] According to another aspect of the present application, a baby stroller is provided. The baby stroller includes a frame according to any of the above embodiments, a seat frame disposed on the pressing rod frame, and a seat assembly disposed on the seat frame.

[0028] In one embodiment, the pressing rod frame includes a pressing rod assembly, the seat frame is movable along the pressing rod assembly, and the baby stroller further includes a seat height adjustment mechanism between the pressing rod frame and the seat frame. The seat height adjustment mechanism has a locked state and an unlocked state. When the seat height adjustment mechanism is in the locked state, the seat frame and the pressing rod assembly are fixed to each other. When the seat height adjustment mechanism is in the unlocked state, the seat frame is movable relative to the pressing rod assembly so that the height of the seat assembly can be adjusted.

[0029] In one embodiment, the baby stroller further includes a seat height adjustment mechanism disposed between the pressing rod frame and the seat frame. The seat height adjustment mechanism includes a plurality of first locking holes provided in the pressing rod assembly and a first locking pin disposed on the seat frame. The first locking pin is movable between a third position and a fourth position. When the first locking pin is in the third position, the first locking pin is inserted into one of the plurality of first locking holes, and when the first locking pin is in the fourth position, the first locking pin is separated from the first locking hole.

[0030] In one embodiment, the seat height adjustment mechanism further includes a height adjustment operating member. The height adjustment operating member includes a pivot end pivotally connected to the first locking pin and an operating end operable to drive the first locking pin to move to the fourth position by the pivot end.

[0031] In one embodiment, the seat height adjustment mechanism further includes a third reset member. Both ends of the third reset member abut against the height adjustment operating member and the seat frame, respectively. The third reset member is adapted to bias the height adjustment operating member to drive the first lock pin to a third position.

[0032] In one embodiment, the pressing rod frame includes a pressing rod assembly, the length of which is adjustable.

[0033] In one embodiment, the stroller further includes a length adjustment mechanism. The pressing rod assembly includes a first pressing rod and a second pressing rod. The first pressing rod is at least partially inserted into the second pressing rod. The length adjustment mechanism includes a plurality of second locking holes provided on the second pressing rod and a second locking pin positioned on the first pressing rod so as to be movable between a fifth position and a sixth position. When the second locking pin is in the fifth position, the second locking pin is inserted into one of the plurality of second locking holes, and when the second locking pin is in the sixth position, the second locking pin is separated from the second locking hole.

[0034] In one embodiment, the length adjustment mechanism includes a length adjustment operating member disposed on a first pressing rod and drivably connected to a second locking pin. The length adjustment operating member is operable to drive the second locking pin to a sixth position.

[0035] In one embodiment, the length adjustment mechanism includes a fourth reset member adapted to bias the second locking pin to move to a fifth position.

[0036] In one embodiment, the seat assembly is rotatable relative to the seat frame.

[0037] In one embodiment, the stroller further includes a connecting base disposed on a seat assembly and movably connected to a seat frame, and a first locking mechanism switchable between an unlocked state and a locked state. The connecting base has a first movable position and a second movable position, where when the connecting base is in the first movable position, the connecting base is immobile relative to the seat frame, and when the connecting base is in the second movable position, the connecting base is rotatable relative to the seat frame. When the first locking mechanism is in the unlocked state, the connecting base is movable between the first movable position and the second movable position relative to the seat frame, and when the first locking mechanism is in the locked state, the connecting base is immobile relative to the seat frame.

[0038] In one embodiment, the seat frame is provided with a guide rail, and the connecting base is provided with a first guide groove on the side facing the seat frame. The connecting base is movable along the guide rail between a first movable position and a second movable position by the engagement of the first guide groove with the guide rail. When the connecting base is in the first movable position, the first guide groove engages with the guide rail so that the connecting base cannot rotate relative to the seat frame. When the connecting base is in the second movable position, the first guide groove disengages from the guide rail so that the connecting base can rotate relative to the seat frame.

[0039] In one embodiment, the first locking mechanism includes a reversal release member operably positioned between the seat frame and the connecting base. The reversal release member is switchable between a reversal release position and a reversal lock position. When the reversal release member is in the reversal lock position, it abuts against the guide rail so that the reversal release member is immobile along the guide rail, thereby restricting the movement of the connecting base along the guide rail. When the reversal release member is in the reversal release position, it is movable along the guide rail so that the connecting base is movable relative to the seat frame.

[0040] In one embodiment, the guide rail includes a switching notch. When the connecting base is in the first moving position, the reversal release member is inserted into the switching notch and moves relative to the guide rail in a direction intersecting the extending direction of the guide rail to switch between a reversal release position and a reversal lock position.

[0041] In one embodiment, the reversal release member includes a strip-shaped positioning groove. The first locking mechanism further includes a positioning pin. The positioning pin is insertable into the positioning groove such that the reversal release member is movable relative to the positioning pin in a direction intersecting the extending direction of the guide rail, and is movable along the extending direction of the guide rail in synchronization with the positioning pin.

[0042] In one embodiment, the first locking mechanism further includes a reversal reset member adapted to bias the reversal unlocking member to move to the reversal lock position.

[0043] In one embodiment, the stroller further includes a movement reset member adapted to bias the connecting base to a first movement position.

[0044] In one embodiment, the stroller further includes a movable reset member and a movable post. The movable post is connected between the connecting base and the seat frame and is movable relative to the seat frame. The movable reset member is connected to the movable post and the seat frame, respectively. The movable reset member is adapted to bias the movable post to drive the connecting base to a first movable position.

[0045] In one embodiment, the guide rail is provided with a rotation notch for the connecting base to rotate. When the connecting base is in the second moving position, the first guide groove is positioned in the rotation notch so that the connecting base can rotate relative to the seat frame.

[0046] In one embodiment, the stroller further includes a movable base. The connecting base is connected to the seat frame by the movable base. When the first locking mechanism is unlocked, the movable base is movable relative to the seat frame and drives the connecting base to move between a first and second movable position. As a result, when the connecting base is in the second movable position, the connecting base is rotatable relative to the seat frame. When the first locking mechanism is locked, the movable base is fixed relative to the seat frame.

[0047] In one embodiment, the stroller further includes a movable base. The connecting base is connected to the seat frame by the movable base. The movable base is provided with a second guide groove that can engage with a guide rail. When the first locking mechanism is unlocked, the movable base is movable along the guide rail by the engagement of the second guide groove with the guide rail, driving the connecting base to move between a first and second movable position. When the first locking mechanism is locked, the movable base is fixed to the seat frame.

[0048] In yet another aspect of the present application, a frame is provided. The frame includes a first wheel frame including a first support assembly, a second wheel frame including a second support assembly, a pressure rod frame including a pressure rod assembly, and a folding mechanism including a connecting assembly and a rotating shaft. The first and second support assemblies and the pressure rod assembly are pivotably connected via the rotating shaft. The first and second support assemblies are rotatably foldable relative to the pressure rod assembly via the connecting assembly. The connecting assembly includes a sun gear fixed to the pressure rod assembly, a rotating plate fixed to the first support assembly and having a first guide groove, the first guide groove including a toothed edge, a planetary gear that meshes with the sun gear and the toothed edge, and a drive shaft positioned eccentrically with respect to the rotating shaft and extending through the second support assembly, the planetary gear and the pressure rod assembly. The second support assembly is pivotably connected to the pressure rod assembly by the drive shaft.

[0049] In yet another aspect of the present application, a seat locking device is provided. The seat locking device is configured to connect a frame and a seat assembly and includes a seat frame connected to the frame and a connecting base disposed on the seat assembly and movably connected to the seat frame. The connecting base has a first moving position and a second moving position. When the connecting base is in the first moving position, the connecting base is immobile relative to the seat frame, and when the connecting base is in the second moving position, the connecting base is rotatable relative to the seat frame.

[0050] In one embodiment, the seat locking device further includes a first locking mechanism that can be switched between an unlocked state and a locked state. When the first locking mechanism is in the unlocked state, the connecting base is movable between a first and a second movable position relative to the seat frame, and when the first locking mechanism is in the locked state, the connecting base is immovable relative to the seat frame.

[0051] In one embodiment, a guide rail is provided on the seat frame, and a first guide groove, which can engage with the guide rail, is provided on the surface of the connecting base facing the seat frame. The connecting base is movable along the guide rail between a first movable position and a second movable position. When the connecting base is in the first movable position, the first guide groove engages with the guide rail so that the connecting base cannot rotate relative to the seat frame. When the connecting base is in the second movable position, the first guide groove disengages from the guide rail so that the connecting base can rotate relative to the seat frame.

[0052] In one embodiment, the seat locking device further comprises a first locking mechanism. The first locking mechanism includes a reverse lock release member that is operably positioned between the seat frame and the connecting base and is switchable between a reverse lock release position and a reverse lock position. When the reverse lock release member is in the reverse lock position, the reverse lock release member abuts against the guide rail so that the reverse lock release member cannot move along the guide rail, thereby restricting the movement of the connecting base along the guide rail. When the reverse lock release member is in the reverse lock release position, the reverse lock release member is movable along the guide rail so that the connecting base can move relative to the seat frame.

[0053] In one embodiment, the guide rail includes a switching notch. When the connecting base is in the first moving position, the reversal unlocking member is inserted into the switching notch and moves relative to the guide rail in a direction intersecting the extending direction of the guide rail so as to switch between the reversal unlocking position and the reversal locked position.

[0054] In one embodiment, the reversal lock release member includes a reversal operation portion that extends outside the connection base.

[0055] In one embodiment, the reversal release member includes a strip-shaped positioning groove. The first locking mechanism further includes a positioning pin. The positioning pin is insertable into the positioning groove such that the reversal release member is movable relative to the positioning pin in a direction intersecting the extending direction of the guide rail, and is movable in the extending direction of the guide rail in synchronization with the positioning pin.

[0056] In one embodiment, the first locking mechanism further includes a reversal reset member adapted to bias the reversal release member toward the reversal lock position.

[0057] In one embodiment, the seat locking device further includes a movement reset member adapted to bias the connecting base to move to a first movement position.

[0058] In one embodiment, the seat locking device further includes a movable reset member and a movable post. The movable post is connected between a connecting base and a seat frame and is movable relative to the seat frame, and the movable reset member is connected to the movable post and the seat frame, respectively, and the movable reset member is adapted to bias the movable post so as to drive the connecting base to a first movable position.

[0059] In one embodiment, the movable post is positioned offset from the rotation axis of the connecting base.

[0060] In one embodiment, the seat frame includes a third receiving groove. A portion of the movable post and the movable reset member are housed within the third receiving groove.

[0061] In one embodiment, the guide rail is provided with a rotating notch configured for the connecting base to rotate, and when the connecting base is in a second moving position, the first guide groove is positioned in the rotating notch so that the connecting base can rotate relative to the seat frame.

[0062] In one embodiment, the guide rail includes a first portion and a second portion, and a rotation notch is formed between the first portion and the second portion. When the connecting base is in the second movable position, the first guide groove is positioned in the rotation notch so that the connecting base is rotatable relative to the seat frame. When the connecting base is in the first movable position, at least a portion of the first guide groove engages with the first portion so that the connecting base is not rotatable relative to the seat frame.

[0063] In one embodiment, the seat locking device further includes a first locking mechanism and a movable base. The connecting base is connected to the seat frame by the movable base. When the first locking mechanism is unlocked, the movable base is movable relative to the seat frame and drives the connecting base to move between a first and second movable position. As a result, when the connecting base is in the second movable position, the connecting base is rotatable relative to the seat frame. When the first locking mechanism is locked, the movable base is fixed relative to the seat frame.

[0064] In one embodiment, the seat frame is provided with a guide rail, and the movable base is provided with a second guide groove that can engage with the guide rail. When the first locking mechanism is unlocked, the movable base is movable along the guide rail by the engagement of the second guide groove with the guide rail, and drives the connecting base to move between a first and second movable position. When the first locking mechanism is locked, the movable base is fixed to the seat frame.

[0065] In one embodiment, the seat locking device further includes a movable base and a second locking mechanism. The connecting base is connected to the seat frame by the movable base and is detachably connected to the movable base by the second locking mechanism.

[0066] In one embodiment, the movable base is provided with an engagement groove. The second locking mechanism includes a separation locking member. The separation locking member is movably positioned on the connecting base and includes a hook portion. The separation locking member is switchable between a separation lock position and a separation unlock position. When the separation locking member is in the separation lock position, the hook portion engages with the engagement groove, and when the separation locking member is in the separation unlock position, the hook portion disengages from the engagement groove.

[0067] In one embodiment, the second locking mechanism further includes a separation lock release member that is driven to the separation lock member. The separation lock release member is operable to drive the separation lock member from the separation lock position to the separation lock release position.

[0068] In one embodiment, the separation locking member includes a first separation locking member. A first projection is provided on one of the first separation locking member and the separation release member, and a first drive groove is provided on the other of the first separation locking member and the separation release member. The first projection is inserted into and cooperates with the first drive groove to drive the first separation locking member to move between a separation lock position and a separation release position. The direction of extension of the first drive groove is parallel to the direction of movement of the separation release member.

[0069] In one embodiment, the separation locking member includes a second separation locking member provided with a locking drive surface. The separation unlocking member is provided with an unlocking drive surface. The unlocking drive surface is contactable with the locking drive surface so as to drive the second separation locking member to switch between a separation lock position and a separation unlock position. The extending direction of the unlocking drive surface intersects with the movement direction of the separation unlocking member.

[0070] In one embodiment, the second separation locking member is provided with a second projection, the side surface of which forms a locking drive surface. The separation unlocking member is provided with a second drive groove, the groove wall of which forms an unlocking drive surface. The second projection is inserted into the second drive groove so that the locking drive surface can contact the unlocking drive surface.

[0071] In one embodiment, two separation / unlocking members are provided, and the two separation / unlocking members are arranged symmetrically with respect to the rotation axis of the connecting base. Two first separation / locking members are provided, and the two first separation / locking members are arranged symmetrically with respect to the rotation axis of the connecting base.

[0072] In one embodiment, two separation / release members are provided, and the two separation / release members are arranged symmetrically with respect to the rotation axis of the connecting base. Two or a multiple of two first separation / lock members are provided. Each pair of second separation / lock members is arranged symmetrically with respect to the rotation axis of the connecting base, and each second separation / lock member is arranged at an angle to an adjacent separation / lock member.

[0073] In one embodiment, each second separation locking member is positioned perpendicular to the adjacent separation unlocking member.

[0074] In one embodiment, two second separation locking members are provided. The two second separation locking members are arranged symmetrically with respect to the rotation axis of the connecting base. The locking drive surface of each second separation locking member includes a first locking drive surface and a second locking drive surface. The separation release member includes a first separation release member and a second separation release member arranged symmetrically with respect to the rotation axis of the connecting base. The release drive surface includes a first release drive surface and a second release drive surface. The first separation release member is provided with two first release drive surfaces. Each first release drive surface abuts against the corresponding first locking drive surface of the second separation locking member. The second separation release member is provided with two second release drive surfaces such that each second release drive surface abuts against the corresponding second locking drive surface of the second separation locking member.

[0075] In one embodiment, the connecting base includes a first housing with a first groove for housing a movable base, and a second housing connected to a seat frame. The first and second housings surround a housing chamber. The connecting base further includes a first opening. The first groove communicates with the housing chamber through the first opening. At least a portion of the separation locking member is housed in the housing chamber. The hook portion of the separation locking member extends into the first groove through the first opening so as to be engageable with the engagement groove.

[0076] In one embodiment, the separation unlocking member includes a separation operation unit and a separation drive unit. The connection base includes a housing chamber and a second opening that penetrates the side wall of the housing chamber. The separation drive unit is located within the housing chamber and is drivenly connected to the separation locking member. The separation operation unit extends outside the housing chamber through the second opening.

[0077] In one embodiment, a first insertion hole is provided in one of the movable base and the connecting base, and a connecting shaft is provided in the other of the movable base and the connecting base. The connecting shaft can be inserted into the first insertion hole.

[0078] In one embodiment, the second locking mechanism further includes a separation reset member positioned between the separation locking member and the connecting base. The separation reset member is adapted to bias the separation locking member to move to the separation locking position.

[0079] In one embodiment, the movable base includes a truncated cone portion and a disc-shaped portion positioned on the end face of the truncated cone portion. An engagement groove is formed between the disc-shaped portion and the truncated cone portion.

[0080] In one embodiment, the separation locking member further includes a wedge-shaped surface positioned on the hook portion. The wedge-shaped surface is adapted to be pressed by a movable base to drive the separation locking member to move.

[0081] In yet another aspect of the present application, a stroller is provided. The stroller includes a seat assembly, a frame, and a seat locking device as described in any of the above embodiments. The seat assembly is connected to the frame by the seat locking device. [Brief explanation of the drawing]

[0082] [Figure 1] This is a schematic diagram of a stroller according to one embodiment of the present invention, with the seat assembly in a forward-extended state. [Figure 2] Figure 1 shows another schematic diagram of the stroller, with the seat assembly in the rearward-extended position. [Figure 3] Figure 1 shows another schematic diagram of the stroller, with the seat assembly in a folded state. [Figure 4] Figure 1 is an exploded view of the stroller. [Figure 5] This is an enlarged view of part A in Figure 4. [Figure 6] Figure 5 is an exploded view of the connecting assembly and a portion of the frame. [Figure 7] Figure 5 is an exploded view showing a part of the connecting assembly and frame from a different perspective. [Figure 8] Figure 1 shows a cross-sectional view of the push rod frame and seat frame of the stroller. [Figure 9] This is an enlarged view of section B in Figure 8. [Figure 10] This is an enlarged view of section C in Figure 8. [Figure 11] Figure 1 is a schematic diagram of a portion of the push rod frame and release assembly of the stroller shown. [Figure 12] This is a partial cross-sectional view of the structure shown in Figure 11. [Figure 13] This is another partial cross-sectional view of the structure shown in Figure 11. [Figure 14] This is a partial cross-sectional view of the structure shown in Figure 5. [Figure 15] This is an enlarged view of section D in Figure 8. [Figure 16]Figure 1 is a partial cross-sectional view of the pressure rod frame of the stroller shown. [Figure 17] This is an enlarged view of section E in Figure 8. [Figure 18] This is a schematic diagram of a stroller according to another embodiment of the present application, in which the seat assembly is in a forward-extended state. [Figure 19] Figure 18 shows another schematic diagram of the stroller, with the seat assembly in the rearward-folded position. [Figure 20] Figure 18 shows another schematic diagram of the stroller, with the seat assembly in a folded state. [Figure 21] Figure 18 is an exploded view of the stroller. [Figure 22] Figure 18 shows another exploded view of the stroller. [Figure 23] This is an enlarged view of section F in Figure 22. [Figure 24] This is a schematic diagram showing a portion of the frame shown in Figure 22 from a different perspective. [Figure 25] Figure 23 is an exploded view of the connecting assembly and a portion of the frame. [Figure 26] Figure 23 is an exploded view showing a part of the connecting assembly and frame from a different perspective. [Figure 27] This is a cross-sectional view along line AA in Figure 24. [Figure 28] This is a cross-sectional view along line BB in Figure 24. [Figure 29] This is a cross-sectional view along the CC line in Figure 24. [Figure 30] Figure 1 is a schematic diagram of the seat frame and movable base of the stroller seat locking device, with the connecting base in the first movement position. [Figure 31] Figure 1 shows another schematic diagram of the seat frame and movable base of the stroller seat locking device, with the connecting base in the second movement position and rotated by a certain angle. [Figure 32] Figure 30 is an exploded view of the seat frame and movable base. [Figure 33]Figure 30 shows a cross-sectional view of the seat frame and movable base, with the first locking mechanism in the locked position. [Figure 34] Figure 30 shows another cross-sectional view of the seat frame and movable base, with the first locking mechanism in the unlocked position. [Figure 35] Figure 1 is a schematic diagram of the stroller from a different viewpoint, showing the connecting base in the second movement position and rotated by a certain angle. [Figure 36] This is an enlarged view of section G in Figure 35. [Figure 37] Figure 35 shows a cross-sectional view of the stroller, with the connecting base in the first movement position. [Figure 38] This is an enlarged view of part H of Figure 37. [Figure 39] This is an enlarged view of section I of Figure 38. [Figure 40] Figure 1 is a schematic diagram of the stroller seat assembly and connection base. [Figure 41] Figure 40 is a cross-sectional view of the second locking mechanism and connecting base of the stroller. [Figure 42] Figure 40 is an exploded view showing the seat assembly, connecting base, and second locking mechanism from a different perspective. [Figure 43] Figure 42 is an exploded view of the second locking mechanism. [Modes for carrying out the invention]

[0083] To make the purpose, features, and advantages of this application clearer and easier to understand, specific embodiments of this application will be described in detail below with reference to the attached drawings. However, the specific embodiments described herein are for illustrative purposes only and do not limit the scope of protection of this application.

[0084] When an element is described as being "fixed" to another element, that element may be directly attached to the other element or attached via an intermediate element. Similarly, when an element is described as being "connected" to another element, it may be directly connected or connected via an intermediate element. The terms "vertical," "horizontal," "up," "down," "left," and "right" used in this specification are for explanatory purposes only and do not represent the only possible implementation.

[0085] Unless otherwise specified, all technical and scientific terms used herein have meanings that are generally understood by a person of ordinary skill in the art. Terms used in this description are for illustrative purposes only and are not intended to limit this application. The terms "and / or" as used herein include any combination of one or more items relating to the application.

[0086] As shown in Figures 1 to 3, one embodiment of the present invention provides a child carrier that is easier to fold. Specifically, the child carrier includes a frame 1, a seat locking device 3, and a seat assembly 2. The frame 1 includes a first wheel frame 100, a second wheel frame 200, a pressing rod frame 400, and a folding mechanism 500. The first wheel frame 100, the second wheel frame 200, and the pressing rod frame 400 are pivotally connected to each other, and when the first wheel frame 100 and the second wheel frame 200 are positioned at a predetermined angle, they form a stable triangular support structure with respect to the ground. The pressing rod frame 400 is located above the first wheel frame 100 and the second wheel frame 200 to facilitate the pressing operation. The folding mechanism 500 is positioned between the first wheel frame 100, the second wheel frame 200, and the pressure rod frame 400, and is configured to enable the rotation and folding of these first wheel frame 100, second wheel frame 200, and pressure rod frame 400.

[0087] Specifically, as shown in Figure 4, the first wheel frame 100 includes two first support assemblies 110 spaced apart in the left-right direction of the frame 1. The first ends of the two first support assemblies 110 move relatively close to each other and are pivotably connected to the press rod frame 400, while the second ends of the two first support assemblies 110 are spaced apart from each other and are respectively connected to two wheel assemblies 800. Furthermore, at least one first connecting rod 120 is connected between the two first support assemblies 110. Referring to Figures 6 and 7, each first support assembly 110 includes a first support rod 111 and a first rotating base 112 connected to the first support rod 111. In this embodiment, the first rotating base 112 includes a substantially disc-shaped first pivot portion 1121 and a first connecting portion 1122 fixedly connected to the first pivot portion 1121. In this embodiment, the first connecting portion 1122 is formed in a sleeve shape and is sleeve-fitted to the first end of the first support rod 111 that is furthest from the wheel assembly 800. In another embodiment, the first connecting portion 1122 may be connected to the first support rod 111 by soldering, welding, riveting, or the like. Alternatively, the first connecting portion 1122 (or the second rotating base 212 described later) and the first support rod 111 may be integrally molded.

[0088] Specifically, as shown in Figures 4 to 6, the second wheel frame 200 has a similar configuration to the first wheel frame 100, and the second wheel frame 200 also includes two second support assemblies 210 that are spaced apart in the left-right direction of the frame 1. The first ends of the two second support assemblies 210 move relatively close to each other and are pivotally connected to the pressing rod frame 400, while the second ends of the two second support assemblies 210 are spaced apart from each other and are respectively connected to the two wheel assemblies 800. In addition, at least one second connecting rod 220 is connected between the two second support assemblies 210. In this way, the first wheel frame 100 and the second wheel frame 200 each form a stable triangular support structure, further improving the overall stability of the frame 1. Each second support assembly 210 includes a second support rod 211 and a second rotating base 212 connected to the second support rod 211. The second rotating base 212 is generally disc-shaped. The second rotating base 212 is connected to the end of the second support rod 211 furthest from the wheel assembly 800. In this embodiment, the central portion of the second rotating base 212 is formed in a sleeve shape and is sleeve-fitted to the first end of the second support rod 211 furthest from the wheel assembly 800. In another embodiment, the second rotating base 212 may be connected to the second support rod 211 by soldering, welding, riveting, etc. Alternatively, the second rotating base 212 and the second support rod 211 may be integrally molded.

[0089] Specifically, as shown in Figure 4, the pressing rod frame 400 includes a pressing rod assembly 410 and a handle assembly 420. The pressing rod assembly 410 and the handle assembly 420 are connected to each other and arranged in a substantially T-shape. The end of the pressing rod assembly 410 away from the handle assembly 420 is pivotally connected to the first wheel frame 100 and the second wheel frame 200. The handle assembly 420 is configured for the user to grip and facilitates the user to push the child carrier to move it.

[0090] Furthermore, as shown in Figure 8, the pressure rod assembly 410 includes a first pressure rod 411, a second pressure rod 412, and a pivot base 413. The first pressure rod 411 and the second pressure rod 412 are connected to slide against each other. In this embodiment, at least a portion of the first pressure rod 411 is inserted into the second pressure rod 412. The length of the pressure rod assembly 410 can be adjusted by a length adjustment mechanism 610. The length adjustment mechanism 610 has a locked state and an unlocked state. When the length adjustment mechanism 610 is in the unlocked state, the first pressure rod 411 can move in the extending direction of the second pressure rod 412 to extend or shorten the pressure rod assembly. When the length adjustment mechanism 610 is in the locked state, the first pressure rod 411 and the second pressure rod 412 are fixed against each other.

[0091] Specifically, the length adjustment mechanism 610 can take various forms. For example, as shown in Figures 8 to 10, the length adjustment mechanism 610 may include a plurality of second lock holes 611 located on one of the first pressing rod 411 and the second pressing rod 412, a second lock pin 612 located on the other of the first pressing rod 411 and the second pressing rod 412, a length adjustment operating member 613, a connecting member 614, and a fourth reset member 615.

[0092] In this embodiment, as shown in Figures 8 to 10, a plurality of second lock holes 611 are arranged on the second pressing rod 412. The second lock pin 612 is movably positioned on the first pressing rod 411 in a portion farther from the handle assembly 420. The second lock pin 612 is movable between a fifth position and a sixth position. When the second lock pin 612 is in the fifth position, it can be inserted into one of the plurality of second lock holes 611. When the second lock pin 612 is in the sixth position, it can be moved away from the second lock hole 611. A length adjustment operating member 613 is positioned on the first pressing rod 411 and connected to the second lock pin 612 via a connecting member 614. The length adjustment operating member 613 can be operated to drive the second lock pin 612 to switch between the fifth position and the sixth position.

[0093] Specifically, as shown in Figures 8 to 10, a first drive groove (not shown) may be provided on one of the connecting member 614 and the length adjustment operating member 613, and a first drive pin (not shown) may be provided on the other of the connecting member 614 and the length adjustment operating member 613. The extending direction of the first drive groove intersects with, but is not perpendicular to, the direction of movement of the length adjustment operating member 613. The first drive pin is inserted into the first drive groove and can move along the first drive groove. A second drive groove (not shown) is provided on one of the connecting member 614 and the second lock pin 612, and a second drive pin 617b is provided on the other of the connecting member 614 and the second lock pin 612. The extending direction of the second drive groove intersects with, but is not perpendicular to, the direction of movement of the length adjustment operating member 613. The second drive pin 617b is inserted into the second drive groove and can move along the second drive groove. The first drive groove and the second drive groove are spaced apart.

[0094] Furthermore, as shown in Figures 8 to 10, the first pressing rod 411 may be provided with a storage cavity 411a extending parallel to the extension direction of the first pressing rod 411. The pressing rod assembly 410 further includes a guide base 414. The guide base 414 is located within the storage cavity 411a. The guide base 414 is provided with a first groove 414a, a second groove (not shown), and a strip hole (not shown) extending through the first groove 414a and the second groove. The extension direction of the second groove intersects with the extension direction of the first groove 414a and the extension direction of the strip hole. A second lock pin 612 is movably inserted into the first groove 414a. A second drive pin 617b extends through the strip hole and connects the second lock pin 612 to a connecting member 614. Both ends of the fourth reset member 615 abut against the connecting member 614 and the guide base 414, respectively. The fourth reset member 615 biases the connecting member 614 to move in a direction that drives the second lock pin 612 to the fifth position.

[0095] The length adjustment process for the pressing rod assembly 410 in this embodiment will be described in detail below.

[0096] When it is necessary to adjust the length of the pressing rod assembly 410, as shown in Figure 10, the length adjustment operating member 613 is pressed in direction T1, and at the same time, the length adjustment operating member 613 drives the connecting member 614 to move in direction T2 by the cooperation of the first drive groove and the first drive pin so that the fourth reset member 615 is compressed. As shown in Figure 9, the connecting member 614 then drives the second lock pin 612 to move in direction T1 by the cooperation of the second drive groove and the second drive pin 617b. When the second lock pin 612 moves away from each second lock hole 611, the lock of the length adjustment mechanism 610 is released. At this point, the first pressing rod 411 becomes movable relative to the second pressing rod 412. Therefore, the overall length of the pressing rod assembly 410 can be adjusted by moving the first pressing rod 411 relative to the second pressing rod 412.

[0097] When the first pressing rod 411 moves to a position facing another second lock hole 611 as needed, the pressing force on the length adjustment operating member 613 can be released, and the connecting member 614 moves in the opposite direction to direction T2 due to the elastic force of the fourth reset member 615. At the same time, the connecting member 614, in cooperation with the second drive groove and the second drive pin 617b, moves the second lock pin 612 in the opposite direction to direction T1 and reinserts it into another second lock hole 611, thereby relocking the first pressing rod 411 and the second pressing rod 412. Also at the same time, the connecting member 614, in cooperation with the first drive groove and the first drive pin, drives the length adjustment operating member 613 to move in the opposite direction to direction T1 and reset it.

[0098] Specifically, as shown in Figures 11 to 13, the handle assembly 420 includes a connecting sleeve 421, a handle body 422, a handle section 423, and a cover 424. The connecting sleeve 421 is T-shaped overall and includes a first sleeve section 4211 and a second sleeve section 4212 that communicate with each other. The first sleeve section 4211 is sleeve-fitted to the end of the first pressing rod 411 of the pressing rod assembly 410. The handle body 422 is a hollow rod. The second sleeve section 4212 is sleeve-fitted to approximately the middle of the handle body 422. The second sleeve section 4212 and the handle body 422 are fixedly connected by a fastener 710. Two handle sections 423 are provided. The two handle sections 423 are spaced apart from each other on the handle body 422. The two handle sections 423 are rotatable relative to the handle body 422. In this embodiment, the two handle portions 423 are each positioned on either side of the second sleeve portion 4212. The two covers 424 are fitted and fixed to both ends of the handle body 422, and are located on the side of the two handle portions 423 that is furthest from the second sleeve portion 4212.

[0099] Furthermore, as shown in Figures 6 and 7, the pivot base 413 includes a substantially disc-shaped second pivot portion 4131 and a second connecting portion 4132 fixedly connected to the second pivot portion 4131. The second connecting portion 4132 of the pivot base 413 is connected to the second pressing rod 412 of the pressing rod assembly 410. In this embodiment, the second connecting portion 4132 is formed in a sleeve shape and is sleeve-fitted to the end of the second pressing rod 412 furthest from the handle assembly 420. In other embodiments, the second connecting portion 4132 may be connected to the second pressing rod 412 by soldering, welding, riveting, etc. Alternatively, the second connecting portion 4132 or the pivot base 413 and the second pressing rod 412 may be integrally formed.

[0100] Furthermore, as shown in Figures 6 and 14, the first pivots 1121 of the two first rotating bases 112, the two second rotating bases 212, and the second pivot 4131 of the pivot base 413 are pivotably connected via the rotating shaft 510. Specifically, the two first rotating bases 112 are located on the left and right sides of the pivot base 413, and the two second rotating bases 212 are located on the sides of the two first rotating bases 112 that are further away from the pivot base 413. In this embodiment, the two first rotating bases 112 are fastened to both sides of the pivot base 413 and abut against the two sides of the pivot base 413, respectively. The two second rotating bases 212 are fastened to the sides of the two first rotating bases 112 that are furthest from the pivot base 413, and abut against the sides of the two first rotating bases 112 that are furthest from the pivot base 413. This reduces the vibration of the frame 1 when the first rotating bases 112, the second rotating bases 212, and the pivot base 413 rotate.

[0101] Specifically, as shown in Figures 14 to 16, the folding mechanism 500 includes a rotating shaft 510, a locking assembly 520, and a connecting assembly 530.

[0102] Specifically, as shown in Figures 14 to 16, the unlock assembly 520 includes a locking member 521, a drive member 522, a tensioning member 523, and a first resetting member 524. The locking member 521 has a cylindrical structure as a whole. In this embodiment, a first housing cavity 4133 is provided within a second connection portion 4132 of a pivot base 413. The locking member 521 is movably positioned within the first housing cavity 4133. Each of the two second rotating bases 212 is provided with a lock recess 1125 that communicates with the first housing cavity 4133. As shown in Figures 6 and 7, the lock recesses 1125 of the two second rotating bases 212 are both provided on the outer circumference of the second rotating bases 212. The opening of the lock recess 1125 faces the first housing cavity 4133 of the second connection portion 4132. The unlock assembly 520 has a locked state and an unlocked state. When the unlock assembly 520 is in the locked state, the locking member 521 is in a relatively low position within the first housing cavity 4133 and is inserted into both of the two locking recesses 1125, fixing the pivot base 413 and the two first rotating bases 112 to each other. When the unlock assembly 520 is in the unlocked state, the locking member 521 is in a relatively high position within the first housing cavity 4133 and is spaced apart from the two locking recesses 1125, and the pivot base 413 becomes rotatable relative to the two first rotating bases 112.

[0103] Furthermore, as shown in Figures 12 and 13, two drive members 522 are provided. The two drive members 522 are rotatably arranged on the handle body 422. Specifically, insertion openings 4212a are provided at both ends of the second sleeve portion 4212. The two drive members 522 are cylindrical and are sleeve-fitted to the handle body 422 at intervals, with at least a portion of each being inserted into the two insertion openings 4212a. The two drive members 522 are rotatable relative to the second sleeve portion 4212. A contact boss 4212b is provided approximately in the center of the inner wall of the second sleeve portion 4212. Both sides of the contact boss 4212b are in contact with the two drive members 522 inserted into the insertion openings 4212a. The two drive members 522 are connected to the corresponding side of the handle portion 423. In this embodiment, each drive member 522 is provided with a connecting groove 5221, and each handle portion 423 is provided with a connecting projection 4231 at one end adjacent to the second sleeve portion 4212 that can be inserted into the corresponding connecting groove 5221. In other embodiments, the drive member 522 and the handle portion 423 may be connected by other means.

[0104] In this embodiment, as shown in Figures 15 and 16, the tension member 523 is a steel wire rope. In other embodiments, the tension member 523 may be another linear body having a certain rigidity. Two tension members 523 are provided. Both ends of each tension member 523 are connected to the locking member 521 and to one of the drive members 522, respectively. In this way, when one of the handle portions 423 rotates to drive the drive member 522 to rotate, the drive member 522 drives the locking member 521 away from the lock recess 1125 via the tension member 523, thereby switching the unlock assembly 520 from the locked state to the unlocked state.

[0105] Furthermore, as shown in Figures 14 and 15, both ends of the first reset member 524 abut against the locking member 521 and the pivot base 413, respectively. The first reset member 524 is adapted to bias the locking member 521 so that it moves in the direction toward insertion into the lock recess 1125. Specifically, the pivot base 413 is provided with a pin (not shown). This pin extends through the pivot base 413 and the second pressing rod 412, fixing the pivot base 413 to the second pressing rod 412. A reset cavity 5211 is provided inside the locking member 521. The reset cavity 5211 includes a contact wall 5212. The contact wall 5212 is provided with a first coupling post 5213. The pin can extend into the reset cavity 5211. The first reset member 524 is positioned within the reset cavity 5211. The first reset member 524 is sleeve-fitted to the outside of the first coupling post 5213. Both ends of the first reset member 524 are in contact with the contact wall 5212 and the pin, respectively. This prevents the first reset member 524 from shifting position during the biasing process. In this embodiment, the pin is located on the handle assembly 420 side of the contact wall 5212, i.e., the pin is located above the contact wall 5212. In this way, when one side of the handle portion 423 rotates and drives the drive member 522 to rotate, the drive member 522 drives the lock member 521 to move away from the lock recess 1125 via the tension member 523, and the first reset member 524 is compressed and deformed. When the external force applied to the handle portion 423 is removed, the elastic force of the first reset member 524 causes the lock member 521 to move towards the lock recess 1125, switching the unlock assembly 520 from the unlocked state to the locked state. In this embodiment, the first reset member 524 is a spring.

[0106] Specifically, as shown in Figures 12 and 13, the unlock assembly 520 further includes a safety unlock member 525, a limiting member 526, and a second reset member 527 to prevent the unlock assembly 520 from being accidentally unlocked due to misoperation of the handle portion 423.

[0107] Furthermore, as shown in Figures 12 and 13, the safety release member 525 and the limiting member 526 are movably arranged on the second sleeve portion 4212. The safety release member 525 is movable between a first position and a second position. When the safety release member 525 is in the first position, the limiting member 526 restricts the movement of the drive member 522. When the safety release member 525 is in the second position, the limiting member 526 releases the restriction on the movement of the drive member 522. The safety release member 525 is operable to move from the first position to the second position. Specifically, the safety release member 525 includes a movable portion 5251 and an operating portion 5252 connected to each other. The movable portion 5251 is positioned between the outer wall of the handle body 422 and the inner wall of the second sleeve portion 4212. The second sleeve portion 4212 is provided with a strip-shaped operating hole 4212c that extends along the extending direction of the handle body 422. The operating section 5252 extends to the outside of the second sleeve section 4212 via the operating hole 4212c and is operable; in other words, the operating section 5252 is movable along the operating hole 4212c.

[0108] Furthermore, as shown in Figures 12 and 13, two limiting members 526 are provided, having a substantially block-like structure. The abutment boss 4212b is provided with a first mounting recess 4212d. The portions of the two drive members 522 adjacent to the abutment boss 4212b are each provided with a second mounting recess 5222. The two second mounting recesses 5222 are opposite and in communication with the first mounting recess 4212d, forming a mounting space for accommodating the limiting members 526. The operating hole 4212c is in communication with this mounting space. The two limiting members 526 are movably arranged within the mounting space and are located on either side of the safety lock release member 525. Taking one of the limiting members 526 as an example, when it moves so that a portion of the limiting member 526 is located in the first mounting recess 4212d and the other portion of the limiting member 526 is located in the second mounting recess 5222, the limiting member 526 can come into contact with the abutment boss 4212b, preventing the drive member 522 from rotating. When the entire limiting member 526 moves into the second mounting recess 5222, the limiting member 526 does not come into contact with the abutment boss 4212b, and the drive member 522 becomes rotatable. Two second resetting members 527 are provided. The two second resetting members 527 are located within the mounting space, each on the side of the two limiting members 526 furthest from the safety lock release members 525. Both ends of each second resetting member 527 are in contact with the corresponding drive member 522 and limiting member 526. The second reset member 527 is adapted to bias the corresponding limiting member 526 so that the corresponding limiting member 526 moves in a direction that restricts the movement of the corresponding drive member 522. The arrangement of the second reset member 527 will be described in detail using one of the second reset members 527 as an example. The limiting member 526 is provided with a second coupling post 5261 on the side farther from the safety lock release member 525. The second reset member 527 is sleeve-fitted to the outside of the second coupling post 5261. Both ends of the second reset member 527 abut against the limiting member 526 and the bottom wall of the second mounting recess 5222, respectively. This prevents the second reset member 527 from shifting position during the biasing process. In this embodiment, the second reset member 527 is a spring.

[0109] The operating principle for preventing accidental unlocking of the safety release assembly 525 will be explained in detail below, using the structure of one side of the safety release assembly 525 as an example.

[0110] When the safety lock release member 525 is in the first position, as shown in Figure 12, the limiting member 526 is partially positioned within the first mounting recess 4212d and partially within the second mounting recess 5222 due to the elastic force of the second reset member 527. In this way, even if the handle portion 423 is rotated, the limiting member 526 abuts against the contact boss 4212b, preventing the drive member 522 from rotating. As a result, the tension member 523 cannot separate the locking member 521 from the locking recess 1125 in order to unlock the lock release assembly 520. Therefore, it is possible to prevent the handle portion 423 from being rotated accidentally and the lock release assembly 520 from being released accidentally. When it is necessary to fold frame 1, as shown in Figure 12, pushing the operating portion 5252 of the safety release member 525 in direction F1 or the opposite direction F1 causes the moving portion 5251 of the safety release member 525 to press against one side of the limiting member 526, moving the limiting member 526 until it is fully positioned within the corresponding second mounting recess 5222, and the second reset member 527 is compressed. In this state, the limiting member 526 does not contact the abutment boss 4212b, so the handle portion 423 can be rotated to drive the drive member 522 to rotate, thereby allowing the tension member 523 to separate the locking member 521 from the locking recess 1125, enabling the release assembly 520 to be unlocked.

[0111] Furthermore, as shown in Figure 5, the folding mechanism 500 includes two connecting assemblies 530. Each first support assembly 110 and each second support assembly 210 are movably connected to the press rod assembly 410 by their respective connecting assemblies 530. Each first support assembly 110 and each second support assembly 210 are rotatable and foldable relative to the press rod assembly 410 by their respective connecting assemblies 530.

[0112] In the following section, we will explain in detail the configuration of a connecting assembly 530, using one of the connecting assemblies 530 as an example.

[0113] The connecting assembly 530 can take on various forms. For example, in the first embodiment, as shown in Figures 5 to 7, the connecting assembly 530 may include a first connecting rod 531, a second connecting rod 532, and a third connecting rod 533. The first end of the first connecting rod 531 is pivotably connected to the side of the pivot base 413. The first end of the second connecting rod 532 is pivotably connected to the second end of the first connecting rod 531, and the second end of the second connecting rod 532 is pivotably connected to the first connecting portion 1122 of the first rotating base 112 on the same side. The first end of the third connecting rod 533 is pivotably connected to the second end of the first connecting rod 531, and the second end of the third connecting rod 533 is pivotably connected to the second support rod 211 on the same side. In other embodiments, the first end of the first connecting rod 531 may be pivotably connected to the second pressing rod 412. Alternatively, the second end of the second connecting rod 532 may be pivotably connected to the first support rod 111 on the same side. Or, the second end of the third connecting rod 533 may be pivotably connected to the second rotating base 212 on the same side. In this embodiment, the second end of the first connecting rod 531, the first end of the second connecting rod 532, and the first end of the third connecting rod 533 are pivotally connected to the drive shaft 534. The drive shaft 534 is positioned behind the pivot base 413 to avoid interference with the seat assembly 2 during the folding process, and furthermore, the frame 1 can be folded only when the pressing rod frame 400 is rotated in direction F2, thereby providing certain limiting protection.

[0114] The operating principle of the connecting assembly 530 in this embodiment will be described in detail below.

[0115] If it is necessary to fold frame 1, as shown in Figures 1 and 2, the unlocking assembly 520 can first be unlocked, and then the press rod frame 400 can be rotated in direction F2, that is, the press rod frame 400 can be moved toward the second wheel frame 200. In this case, during the rotation of the press rod frame 400, the press rod frame 400 drives the first wheel frame 100 to rotate in the opposite direction to direction F2 by the first connecting rod 531 and the second connecting rod 532 which are pivotally connected to each other, and drives the second wheel frame 200 to rotate in the opposite direction to direction F2 by the first connecting rod 531 and the third connecting rod 533 which are pivotally connected to each other. That is, the first wheel frame 100 and the second wheel frame 200 move toward the press rod frame 400. In this way, the pressing rod frame 400, the first wheel frame 100, and the second wheel frame 200 all rotate and move toward each other, thereby achieving the folding of the entire frame 1 as shown in Figure 3.

[0116] When frame 1 needs to be deployed, as shown in Figure 3, the pressure rod frame 400 is rotated in the opposite direction to direction F2, causing the pressure rod frame 400 to rotate away from the first wheel frame 100 and the second wheel frame 200. Simultaneously, the pressure rod frame 400 drives the first wheel frame 100 to rotate in direction F2 by the first connecting rod 531 and the second connecting rod 532, which are pivotally connected to each other, and drives the second wheel frame 200 to rotate in direction F2 by the first connecting rod 531 and the third connecting rod 533, which are pivotally connected to each other. In other words, the first wheel frame 100 and the second wheel frame 200 are rotated away from the pressure rod frame 400 and deployed. When the pressing rod frame 400, the first wheel frame 100, and the second wheel frame 200 are rotated to predetermined positions, the elastic force of the first reset member 524 causes the locking member 521 to be inserted into the locking recess 1125, and the frame 1 is locked in the deployed state as shown in Figures 1 and 2.

[0117] In this embodiment, two connecting assemblies 530, each consisting of a first connecting rod 531, a second connecting rod 532, and a third connecting rod 533, are positioned on either side of the pivot base 413. This allows the first wheel frame 100 and the second wheel frame 200 to be driven synchronously and smoothly to rotate and fold while the press rod frame 400 rotates. In other embodiments, the folding mechanism 500 may consist of only one connecting assembly 530. In this case, the first connecting rod 531, the second connecting rod 532, and the third connecting rod 533 of the connecting assembly 530 are all positioned on the same side of the pivot base 413. That is, the press rod frame 400 can be driven to rotate and fold the first wheel frame 100 and the second wheel frame 200 using only one connecting assembly 530.

[0118] In a second embodiment, as shown in Figures 25 and 26, the coupling assembly 530 may include a sun gear 535, a rotating plate 536, a plurality of planetary gears 537, and a drive shaft 534. The sun gear 535 is fixed to the side of the second pivot portion 4131 of the pivot base 413. The rotating plate 536 is fixed to the side of one of the first rotating bases 112 facing the pivot base 413. The plurality of planetary gears 537 are each positioned between the corresponding first rotating bases 112 and the pivot base 413. As shown in Figure 27, the drive shaft 534 is positioned eccentrically with respect to the rotating shaft 510. The drive shaft 534 extends through the second rotating base 212, the planetary gears 537, and the pivot base 413. The second rotating base 212 is pivotably connected to the pivot base 413 by the drive shaft 534.

[0119] One specific configuration of the connecting assembly 530 in this embodiment will be described in detail below.

[0120] Specifically, as shown in Figures 25 and 26, multiple teeth are provided circumferentially on at least a portion of the outer circumference of the sun gear 535. In this embodiment, the multiple teeth are arranged over approximately one-third of the circumference of the sun gear 535. In other embodiments, the range of gear teeth arrangement on the outer circumference of the sun gear 535 may be adjusted as needed. The sun gear 535 is fixed to the side of the second pivot portion 4131 of the pivot base 413 and is arranged coaxially with the second pivot portion 4131. The rotating shaft 510 extends through the center of the circle of the sun gear 535. The rotating plate 536 is a sector-shaped seat structure in the shape of a one-third arc as a whole, and the rotating plate 536 is provided with an arc-shaped first guide groove 5361. As shown in Figure 29, a toothed edge portion 5362 is provided on the groove wall of the first guide groove 5361. The toothed edge portion 5362 is substantially parallel to the arc-shaped edge of the rotating plate 536. The tips of the teeth of the toothed edge 5362 are directed toward the center of the circle of the rotating plate 536. In other words, the toothed edge 5362 is arranged along the circumferential direction of the rotating plate 536. The toothed edge 5362 is provided on the groove wall of the first guide groove 5361 on the side away from the center of the circle of the rotating plate 536. Multiple teeth are provided on the entire outer circumference of the planetary gear 537. The planetary gear 537 meshes with the sun gear 535 and the toothed edge 5362 of the rotating plate 536, respectively. The toothed edge 5362 has a first end 5363 and a second end 5364 to restrict the movement of the planetary gear 537 between the first end 5363 and the second end 5364.

[0121] Specifically, as shown in Figures 25 and 26, a mounting post 2122 is provided on the surface of the second rotating base 212 facing the first rotating base 112. The mounting post 2122 is provided with a mounting groove 2123 extending in its longitudinal direction. The first rotating base 112 has a second guide groove 1123 that penetrates the first rotating base 112. The mounting post 2122 can extend through the second guide groove 1123 and is movable along the second guide groove 1123. The first end of the drive shaft 534 is inserted into and fixed in the mounting groove 2123, and the second end of the drive shaft 534 extends through the planetary gear 537 and the pivot base 413 in sequence. The planetary gear 537 is fixedly connected to the drive shaft 534, and the drive shaft 534 is rotatable relative to the pivot base 413.

[0122] In this embodiment, the two connecting assemblies 530 have substantially identical drive shafts 534. Therefore, the first end of the drive shaft 534 is inserted into and secured in a mounting groove 2123 of one of the second rotating bases 212, and the second end of the drive shaft 534 extends through one planetary gear 537, the pivot base 413, and the other planetary gear 537 in sequence, before being inserted into and secured in a mounting groove 2123 of the other second rotating base 212. Both planetary gears 537 are fixedly connected to the drive shaft 534. The drive shaft 534 is rotatable relative to the pivot base 413. In other embodiments, the two connecting assemblies 530 may each have different drive shafts 534.

[0123] The operating principle of the connecting assembly 530 in this embodiment will be described in detail below.

[0124] When frame 1 needs to be folded, as shown in Figures 18 and 19, the unlocking assembly 520 is first unlocked, and then the press rod frame 400 can be rotated in direction F3. That is, the press rod frame 400 can be moved toward the second wheel frame 200. As shown in Figure 29, the sun gear 535 fixed to the pivot base 413 also rotates in direction F3, driving the planetary gear 537 that meshes with the sun gear 535 to rotate in the opposite direction to direction F3. During the rotation of the planetary gear 537, the rotating plate 536 that meshes with the planetary gear 537 is also driven by the toothed edge 5362 to rotate in the opposite direction to direction F3. That is, the first wheel frame 100 moves toward the press rod frame 400. Also during the rotation of the planetary gear 537, the second wheel frame 200 is also driven by the drive shaft 534 to rotate in the opposite direction to direction F3. In other words, the second wheel frame 200 also moves toward the pressure rod frame 400. In this way, the pressure rod frame 400, the first wheel frame 100, and the second wheel frame 200 all rotate and move toward each other, achieving the folding of the entire frame 1. When the planetary gear 537 moves along the toothed edge 5362 from the first end 5363 to the second end 5364, the frame 1 reaches the folded position as shown in Figure 20.

[0125] When frame 1 needs to be deployed, pushing the pressure rod frame 400 in the opposite direction to direction F3 causes the pressure rod frame 400 to rotate away from the first wheel frame 100 and the second wheel frame 200. Simultaneously, as shown in Figure 29, the sun gear 535 fixed to the pivot base 413 also rotates in the opposite direction to direction F3, driving the planetary gear 537 that meshes with the sun gear 535 to rotate in direction F3. During the rotation of the planetary gear 537, the rotating plate 536 that meshes with the planetary gear 537 is also driven to rotate in direction F3 by its toothed edge 5362. That is, the first wheel frame 100 is deployed away from the pressure rod frame 400. During the rotation of the planetary gear 537, the second wheel frame 200 is also driven by the drive shaft 534 to rotate in direction F3, and the second wheel frame 200 unfolds away from the pressure rod frame 400. When the pressure rod frame 400, the first wheel frame 100, and the second wheel frame 200 have rotated to predetermined positions, the elastic force of the first reset member 524 causes the lock member 521 to be inserted into the lock recess 1125, and the frame 1 is locked in the unfolded state as shown in Figures 18 and 19.

[0126] Furthermore, as shown in Figures 25, 26, and 28, a first limiting projection 4135 is provided on the front surface of the pivot base 413 of this embodiment. A second limiting projection 1124 is provided on the first pivot portion 1121 of each of the two first rotating bases 112. A third limiting projection 2121 is provided on each of the two first rotating bases 112. When the frame 1 is in the deployed position, the two second limiting projections 1124 and the two third limiting projections 2121 abut against the first limiting projection 4135, and in direction F3, the first limiting projection 4135 is located in front of the two second limiting projections 1124 and the two third limiting projections 2121. That is, when frame 1 is in the deployed position, the two second restricting protrusions 1124, the two third restricting protrusions 2121, and the first restricting protrusion 4135 abut against each other, preventing the pivot base 413 from driving the press rod frame 400 to rotate further in the opposite direction to direction F3, and frame 1 can only be folded when the press rod frame 400 is rotated in direction F3. In other embodiments, the second restricting protrusion 1124, which can abut against the first restricting protrusion 4135, may be provided only on the first pivot portion 1121 of one of the first rotating bases 112, or the third restricting protrusion 2121, which can abut against the first restricting protrusion 4135, may be provided only on one of the second rotating bases 212, and in this case as well, restricting protection can be provided.

[0127] In this embodiment, a coupling assembly 530, comprising a sun gear 535, a rotating plate 536, a planetary gear 537, and a drive shaft 534, is positioned on each side of the pivot base 413. This allows the first wheel frame 100 and the second wheel frame 200 to be rotated and folded synchronously and smoothly while the press rod frame 400 rotates. In other embodiments, the folding mechanism 500 may consist of only one coupling assembly 530. The sun gear 535, rotating plate 536, planetary gear 537, and drive shaft 534 of this coupling assembly 530 are all positioned on the same side of the pivot base 413. That is, the press rod frame 400 can be driven to rotate and fold the first wheel frame 100 and the second wheel frame 200 by only one coupling assembly 530.

[0128] Furthermore, as shown in Figures 1 and 8, the seat locking device 3 may include a seat frame 31. The seat frame 31 is movably positioned on the pressure rod frame 400. Specifically, the seat frame 31 is movably positioned on the second pressure rod 412 of the pressure rod frame 400. The seat assembly 2 is detachably positioned on the seat frame 31 and is configured to provide seating space for a child. The seat frame 31 can be positioned on the second pressure rod 412 by a seat height adjustment mechanism 620. The seat height adjustment mechanism 620 is switchable between a locked state and an unlocked state. When the seat height adjustment mechanism 620 is in the locked state, the seat frame 31 and the second pressure rod 412 are fixed to each other. When the seat height adjustment mechanism 620 is in the unlocked state, the seat frame 31 is movable relative to the second pressure rod 412.

[0129] Specifically, as shown in Figures 8 and 17, the seat frame 31 includes a support portion 311 and a mounting portion 315 connected to each other. The support portion 311 is configured to be detachably connected to the seat assembly 2. The mounting portion 315 is configured to be movably connected to the second pressing rod 412. For example, the mounting portion 315 may be formed in a sleeve shape and sleeve-fitted to the outside of the second pressing rod 412, making it movable along the second pressing rod 412. The seat height adjustment mechanism 620 may include a plurality of first lock holes 621 provided in the second pressing rod 412, a first lock pin 622 movably positioned in the mounting portion 315, a height adjustment operating member 623, and a third reset member 624.

[0130] In this embodiment, as shown in Figures 8 and 17, the plurality of first lock holes 621 and the plurality of second lock holes 611 are provided on opposite sides of the second pressing rod 412 to avoid interference between the first lock pin 622 and the second lock pin 612. The first lock pin 622 is movable between a third position and a fourth position. When the first lock pin 622 is in the third position, it can be inserted into any of the plurality of first lock holes 621. When the first lock pin 622 is in the fourth position, it can be separated from the first lock hole 621.

[0131] Specifically, as shown in Figure 17, the mounting portion 315 is provided with a storage groove 3151 having an opening on the side furthest from the second pressing rod 412. The height adjustment operating member 623 is positioned within the storage groove 3151. Both ends of the height adjustment operating member 623 are referred to as the operating end 6231 and the pivot end 6232, respectively. At least the operating end 6231 of the height adjustment operating member 623 is exposed from the groove (rabbet) of the storage groove 3151 and is operable. A through hole 3152 is provided at the bottom of the storage groove 3151, communicating with the internal cavity of the mounting portion 315. The first end of the first lock pin 622 is pivotably connected to the pivot end 6232 of the height adjustment operating member 623, and the second end of the first lock pin 622 extends through the through hole 3152 and can be inserted into one of the multiple first lock holes 621 of the second pressing rod 412. This locks the seat height adjustment mechanism 620, fixing the seat frame 31 to a predetermined height relative to the second pressing rod 412. The approximate center of the height adjustment operating member 623 is pivotably connected to the groove wall of the storage groove 3151 by a pivot member 720. Both ends of the third reset member 624 abut against the height adjustment operating member 623 and the seat frame 31, respectively. The third reset member 624 is adapted to bias the height adjustment operating member 623 so as to move the first lock pin 622 to the third position. Specifically, a contact groove 6233 is provided on the surface of the operating end 6231 of the height adjustment operating member 623 that faces the storage groove 3151, and a mounting post 3153 facing the contact groove 6233 is provided at the bottom of the storage groove 3151. The first end of the third reset member 624 is inserted into the contact groove 6233 and abuts against the bottom of the contact groove 6233. The second end of the third reset member 624 is sleeve-fitted to the outside of the mounting post 3153 and abuts against the bottom of the storage groove 3151. This arrangement prevents the third reset member 624 from shifting position during the deformation process. In this embodiment, the operating end 6231 and pivot end 6232 of the height adjustment operating member 623 are located on both sides of the pivot member 720. The operating end 6231 is located on the handle portion 423 side of the pivot end 6232. That is, in the height direction of the second pressing rod 412, the third reset member 624 is positioned relatively above the first lock pin 622.

[0132] The operating principle of the seat height adjustment mechanism 620 described above is as follows:

[0133] When it is necessary to adjust the height of the seat assembly 2 using the seat height adjustment mechanism 620, as shown in Figure 17, the height adjustment operating member 623 can be pressed in direction F4, compressing and deforming the third reset member 624, causing the height adjustment operating member 623 to pivot in direction F5, and simultaneously driving the first lock pin 622, which is pivotally connected to the height adjustment operating member 623, to move in the opposite direction to direction F4. When the first lock pin 622 moves to the fourth position and separates from the first lock hole 621, the seat height adjustment mechanism 620 switches from the locked state to the unlocked state, and the seat frame 31 becomes movable relative to the second pressing rod 412, allowing the height of the seat assembly 2 to be changed. When the seat frame 31 moves to the desired height position relative to the second pressing rod 412, the pressing force on the height adjustment operating member 623 is removed. Then, the height adjustment operating member 623 moves in the opposite direction to direction F5 due to the elastic force of the second reset member 527, driving the first lock pin 622, which is pivotally connected to the height adjustment operating member 623, to move in direction F4. When the first lock pin 622 moves to the third position and is inserted into another first lock hole 621, the seat height adjustment mechanism 620 switches from the unlocked state to the locked state, and the seat frame 31 is fixed at the desired height position relative to the second pressing rod 412, that is, the seat assembly 2 is adjusted to the desired height.

[0134] Furthermore, the seat locking device 3 of this application enables rotation of the seat assembly 2 relative to the frame, for example, 360-degree rotation of the seat assembly 2 relative to the frame. In addition, the seat locking device 3 enables rapid removal of the seat assembly 2 from the frame 1. The seat locking device 3 is detachably connected to the pressing rod frame 400.

[0135] As shown in Figures 4 and 30, the seat locking device 3 may further include a connecting base 32, a movable base 33, and a first locking mechanism 34. The connecting base 32 is positioned on the seat assembly 2. The connecting base 32 is movably connected to the seat frame 31 by the movable base 33. As shown in Figures 30 and 31, the connecting base 32 has a first movable position and a second movable position. When the connecting base 32 is in the first movable position, the connecting base 32 cannot rotate relative to the seat frame 31. When the connecting base 32 is in the second movable position, the connecting base 32 can rotate relative to the seat frame 31. The first locking mechanism 34 is switchable between an unlocked state and a locked state, allowing the connecting base 32 to rotate relative to the seat frame 31 or to fix the connecting base 32 at a desired rotation angle. This enables the inversion and positioning of the seat assembly 2. Specifically, when the first locking mechanism 34 is unlocked, the movable base 33 can drive the connecting base 32 to move relative to the seat frame 31, thereby moving the connecting base 32 between a first and second position relative to the seat frame 31. When the connecting base 32 moves to the second position, it becomes rotatable relative to the seat frame 31 about the rotation axis R, thereby inverting the seat assembly 2. When the first locking mechanism 34 is locked, the movable base 33 cannot move relative to the seat frame 31, and consequently, the connecting base 32 also cannot move relative to the seat frame 31. In this case, when the connecting base 32 is in the first position, it cannot rotate relative to the seat frame 31, thereby fixing the connecting base 32 relative to the seat frame 31. Thus, the seat assembly 2 is fixed at the desired rotation angle.

[0136] In other embodiments not shown, the seat locking device 3 may not include the movable base 33. The connecting base 32 is directly connected to the seat frame 31. The first locking mechanism 34 allows the connecting base 32 to be rotated relative to the seat frame 31 or fixed relative to the seat frame 31. Specifically, when the first locking mechanism 34 is unlocked, the connecting base 32 is movable between a first and second movable position relative to the seat frame 31. When the connecting base 32 is moved to the second movable position, the connecting base 32 becomes rotatable relative to the seat frame 31, thereby inverting the seat assembly 2. When the first locking mechanism 34 is locked, the connecting base 32 is not movable relative to the seat frame 31. In this case, when the connecting base 32 is in the first movable position, the connecting base 32 cannot rotate relative to the seat frame 31 and is fixed relative to the seat frame 31. Thus, the seat assembly 2 is fixed at a desired rotation angle.

[0137] As shown in Figures 4 and 30-32, the seat frame 31 is movably connected to the pressing rod frame 400 of the frame 1. A movable base 33 and a connecting base 32 are movably connected to the support portion 311 of the seat frame 31. The support portion 311 of the seat frame 31 has a substantially circular cross-section. The support portion 311 is provided with a guide rail 312 and a third receiving groove 313. The third receiving groove 313 extends in the front-rear direction. The extension of the third receiving groove 313 intersects the rotation axis R. In this embodiment, front and rear refer to the directions in which the stroller moves forward or backward when in motion, respectively.

[0138] As shown in Figures 30 to 32 and Figure 35, the guide rail 312 is adapted to engage with the movable base 33 and the connecting base 32. A first guide groove 321, which can engage with the guide rail 312, is provided on the surface of the connecting base 32 facing the seat frame 31. When the connecting base 32 is in the first movable position, the first guide groove 321 engages with the guide rail 312, thereby preventing the connecting base 32 from rotating relative to the seat frame 31. When the connecting base 32 is in the second movable position, the first guide groove 321 disengages from the guide rail 312, and the connecting base 32 becomes rotatable relative to the seat frame 31.

[0139] Furthermore, as shown in Figures 32 and 35, the cross-section of the guide rail 312 is T-shaped overall in order to restrict the movable base 33 or the connecting base 32 to the guide rail 312. The guide rail 312 is provided with a rotating notch 3121 configured for the connecting base 32 to rotate, and a switching notch 3122 configured for the first locking mechanism 34 to switch between an unlocked state and a locked state. The guide rail 312 includes a first section 3123, a third section 3124, and a second section 3125 that extend in the same direction. That is, the first section 3123, the third section 3124, and the second section 3125 are all located on the same straight line. The first section 3123 and the third section 3124 are spaced apart for the rotating notch 3121. The third section 3124 and the second section 3125 are spaced apart to form the switching notch 3122. The end of the second portion 3125 furthest from the third portion 3124 forms the outer end 3126 of the guide rail 312. As shown in Figure 31 or Figure 35, when the connecting base 32 is in the second moving position, the first guide groove 321 can be located at the rotation notch 3121 or at the side of the second portion 3125 of the guide rail 312 furthest from the rotation notch 3121. That is, when the first guide groove 321 is located at the rotation notch 3121, the first guide groove 321 disengages from the guide rail 312, and the connecting base 32 becomes rotatable relative to the seat frame 31. The end of the first portion 3123 facing the third portion 3124 is provided with a chamfer or rounded corner 3127, so that even if there is a slight angular misalignment between the first guide groove 321 and the guide rail 312, the first guide groove 321 will automatically adjust its angle and engage with the guide rail 312. In other words, the first guide groove 321 and the guide rail 312 are automatically aligned even if there is a slight angular misalignment between them. Furthermore, the outer end 3126 is also provided with a corresponding chamfer or rounded corner 3127, so that the first guide groove 321 and the guide rail 312 are automatically aligned even if there is a slight angular misalignment between them.

[0140] As shown in Figures 32 and 35, the extending direction of the guide rail 312 is parallel to the extending direction of the third receiving groove 313, that is, the guide rail 312 extends in the front-rear direction. In this embodiment, two guide rails 312 are provided. The two guide rails 312 are arranged symmetrically with respect to the rotation axis R of the connecting base 32, so that the movable base 33 and the connecting base 32 can move smoothly along the guide rails 312. In other embodiments not shown, one, three, or more guide rails 312 may be provided, and the guide rails 312 are not particularly limited in this application as long as they can move the connecting base 32 between a first moving position and a second moving position relative to the seat frame 31.

[0141] In one embodiment, as shown in Figures 32 to 35, the movable base 33 includes a truncated cone portion 336 and a disc-shaped portion 335. The outer contour of the truncated cone portion 336 is tapered or substantially tapered. The disc-shaped portion 335 is connected to the first end of the truncated cone portion 336. An engagement groove 331 is formed at the connection between the disc-shaped portion 335 and the truncated cone portion 336. The engagement groove 331 engages with a second locking mechanism 35 and is configured to detachably connect the connecting base 32 to the movable base 33. For specific details of the second locking mechanism 35, please refer to the description below. At the second end of the truncated cone portion 336, on the side farther from the disc-shaped portion 335, a second guide groove 332 is provided to engage with a guide rail 312 and guide the movable base 33 to slide along the guide rail 312. The movable base 33 is provided with a storage cavity 334. At least a portion of the first locking mechanism 34 is housed within the storage cavity 334. The second guide groove 332 communicates with the storage cavity 334, and when the second guide groove 332 engages with the guide rail 312, a portion of the guide rail 312 is housed within the storage cavity 334, allowing the first locking mechanism 34 to avoid or interfere with the guide rail 312, thereby enabling switching between the unlocked and locked states. When the first locking mechanism 34 is in the locked state, at least a portion of the first locking mechanism 34 abuts against the guide rail 312, and the second guide groove 332 cannot move relative to the guide rail 312 in a direction parallel to the guide rail 312 (i.e., the first direction D1). As a result, neither the first locking mechanism 34 nor the movable base 33 can move relative to the guide rail 312 (or seat frame 31) in the first direction D1, nor can the connecting base 32 move relative to the guide rail 312 (or seat frame 31) in the first direction D1. When the first locking mechanism 34 is in the unlocked state, the first locking mechanism 34 does not interfere with the relative sliding between the second guide groove 332 and the guide rail 312, and the first locking mechanism 34 and the movable base 33 become movable in the first direction D1 relative to the guide rail 312 (or seat frame 31), and the connecting base 32 can be driven to move in the first direction D1 between the first and second movable positions.When the connecting base 32 moves to the second movement position, the connecting base 32 becomes rotatable relative to the seat frame 31 (see Figures 35 and 36).

[0142] Furthermore, as shown in Figures 32 and 38, the movable base 33 is provided with a connecting shaft 333. The connecting shaft 333 is connected to the connecting base 32 and is adapted to provide a rotation axis R that allows the connecting base 32 to rotate relative to the movable base 33. The connecting base 32 is provided with a corresponding first insertion hole 326. The connecting shaft 333 is inserted into the first insertion hole 326. The movable base 33 is connected to the seat frame 31 by a movable post 36. As shown in Figure 33, the first end of the movable post 36 is connected to the movable base 33, and the second end of the movable post 36 is inserted into a third receiving groove 313 and is movable within the third receiving groove 313. The movable post 36 is offset from the rotation axis R of the connecting base 32. In this embodiment, the movable post 36 includes screws, bolts, etc. Optionally, the first end of the movable post 36 may be screw-connected to the movable base 33.

[0143] In one embodiment, as shown in Figures 32 and 38, the seat locking device 3 may further include a movable reset member 37. The movable reset member 37 is connected to the movable post 36 and the seat frame 31. The movable reset member 37 is adapted to bias the movable post 36 to move the movable base 33, thereby driving the connecting base 32 to move to a first movable position. The movable reset member 37 includes a spring. Specifically, the movable reset member 37 includes a tension spring. The first end of the movable reset member 37 is connected to the groove wall of the third receiving groove 313, and the second end of the movable reset member 37 is connected to the movable post 36.

[0144] In one embodiment, as shown in Figures 32 to 34, the first locking mechanism 34 includes a reversal unlocking member 341, a reversal resetting member 342, and a positioning pin 343. At least a portion of the reversal unlocking member 341 is located within a storage cavity 334. The reversal unlocking member 341 intersects with the guide rail 312. The reversal unlocking member 341 is movable in a second direction D2 relative to the movable base 33 and is switchable between a reverse-unlocked position and a reverse-locked position, i.e., the first locking mechanism 34 can be switched between a locked state and an unlocked state. The second direction D2 intersects with the extending direction of the guide rail 312, i.e., the second direction D2 intersects with the first direction D1 and is perpendicular to the rotation axis R of the connecting base 32. In this embodiment, the second direction D2 and the first direction D1 are perpendicular to each other. The reversal unlocking member 341 is also movable in a first direction D1 relative to the seat frame 31, thereby allowing the movable base 33 to move relative to the seat frame 31 and drive the connecting base 32 to move between a first and second movable position.

[0145] In one embodiment, as shown in Figures 32 to 34, the reversal release member 341 includes a first recess 3411. The first recess 3411 is located within the storage cavity 334 and is capable of cooperating with the guide rail 312. The guide rail 312 is movable along the first recess 3411. The cross-sectional shape of the first recess 3411 matches the cross-sectional shape of the guide rail 312, or the guide rail 312 can be fully positioned within the first recess 3411. For example, the cross-section of the guide rail 312 is T-shaped. Correspondingly, the cross-section of the first recess 3411 can be T-shaped or rectangular, allowing the guide rail 312 to pass through the first recess 3411, thereby enabling the reversal release member 341 to move in a first direction D1 relative to the guide rail 312.

[0146] As shown in Figures 30 to 32, when the connecting base 32 is in the first moving position, the reversal release member 341 is inserted into the switching notch 3122 of the guide rail 312. The reversal release member 341 moves relative to the guide rail 312 in a direction intersecting the extending direction of the guide rail 312. That is, in this embodiment, the reversal release member 341 can move in a second direction D2 to switch between the reversal release position and the reversal lock position. When the reversal release member 341 is in the reversal release position, the first recess 3411 and the guide rail 312 (specifically the third portion 3124 and the second portion 3125) are aligned with each other in direction D1 (see Figure 34). Because the guide rail 312 and the first recess 3411 of the reversal release member 341 are aligned, the reversal release member 341 can move in a first direction D1 relative to the guide rail 312, and therefore the movable base 33 and connecting base 32 can move in a first direction D1 relative to the seat frame 31. When the reversal release member 341 is in the reversal locked position, the first recess 3411 and the guide rail 312 (specifically the third portion 3124 and the second portion 3125) are offset from each other by at least a portion in direction D1 (see Figure 33). Because both sides of the reversal release member 341 abut against the third portion 3124 and the second portion 3125, respectively, the reversal release member 341 cannot move in a first direction D1 relative to the guide rail 312, and therefore the movable base 33 and connecting base 32 cannot move in a first direction D1 relative to the seat frame 31. When the connecting base 32 is in the second movement position, the reversal release member 341 is located on the side away from the rotation notch 3121 in the second portion 3125. In this case, if the pressing force applied to the reversal release member 341 is maintained, the reversal release member 341 is held in the reversal unlocked state. In another embodiment, a limiting element (not shown) can be provided in the third receiving groove 313 to limit the forward movement of the movable post 36. As a result, when the movable post 36 moves to contact the limiting element, the connecting base 32 is in the second movement position, and at this time the first recess 3411 of the reversal release member 341 is located away from the switching notch 3122 in the guide rail 312.In other words, the first recess 3411 engages with the second portion 3125 of the guide rail 312, and even when the pressing force applied to the reversal release member 341 is removed, the reversal release member 341 remains in the reversal release position and cannot move from the reversal release position to the reversal lock position. Correspondingly, two first recesses 3411 are provided. Each of the two guide rails 312 can pass through the two first recesses 3411.

[0147] In other embodiments (not shown), the guide rail 312 includes a first portion 3123 and a second portion 3125 extending in the same direction. That is, the first portion 3123 and the second portion 3125 are located on the same straight line. The first portion 3123 and the third portion 3124 are spaced apart and form a rotating notch 3121 or a switching notch 3122. In this embodiment, the rotating notch 3121 and the switching notch 3122 are the same component. When the connecting base 32 is in the first moving position, the reversal release member 341 is inserted into the switching notch 3122 of the guide rail 312, and the reversal release member 341 moves in a direction intersecting the extending direction of the guide rail 312. That is, in this embodiment, the reversal release member 341 can move in a second direction D2 to switch between a reversal release position and a reversal lock position. When the reversal release member 341 is in the reversal release position, the first recess 3411 and the guide rail 312 (specifically the third portion 3124 and the second portion 3125) are aligned with each other in direction D1 (see Figure 34). Since the guide rail 312 is aligned with the first recess 3411 of the reversal release member 341, the reversal release member 341 can move in the first direction D1 relative to the guide rail 312, and therefore the movable base 33 and the connecting base 32 can move in the first direction D1 relative to the seat frame 31. When the reversal release member 341 is in the reversal lock position, the first recess 3411 and the guide rail 312 (specifically the third portion 3124 and the second portion 3125) are offset from each other in direction D1, at least in part (see Figure 33). Because the side of the reversal release member 341 abuts against the second portion 3125, the reversal release member 341 cannot move in the direction away from the first portion 3123 relative to the guide rail 312, i.e., in the first direction D1, and therefore the movable base 33 and the connecting base 32 cannot move in the first direction D1 relative to the seat frame 31.When the connecting base 32 is in the second movable position, the first guide groove 321 is located on the side of the second portion 3125 of the guide rail 312 away from the rotation notch 3121, or on the rotation notch 3121 itself, so that the first guide groove 321 disengages from the guide rail 312, thereby allowing the connecting base 32 to rotate relative to the seat frame 31.

[0148] As shown in Figures 32 to 34, the reversal lock release member 341 is provided with a strip-shaped positioning groove 3412. The extension direction of the positioning groove 3412 is parallel to the second direction D2. The positioning pin 343 is inserted into the positioning groove 3412, and the reversal lock release member 341 is movable relative to the positioning pin 343 in the second direction D2 and movable synchronously with the positioning pin 343 in the first direction D1. In this embodiment, the first end of the positioning pin 343 is connected to the movable base 33. Specifically, the positioning pin 343 is detachably connected to the disc-shaped portion 335 of the movable base 33. In other embodiments, if the movable base 33 is not provided, for example, the second end of the positioning pin 343 can be movably connected to the sheet frame 31, making the positioning pin 343 movable relative to the sheet frame 31 in the first direction D1 and immovable in the second direction D2, and the second end of the positioning pin 342 can be inserted into the positioning groove 3412.

[0149] Furthermore, as shown in Figures 32 to 34, the reversal release member 341 includes a reversal operation section 3413. The movable base 33 is provided with a through-opening 337 that extends through the wall of the storage cavity 334. The reversal operation section 3413 of the reversal release member 341 extends outward from the storage cavity 334 through the through-opening 337, facilitating the operation of the reversal release member 341. The reversal release member 341 further includes a limiting member 3414. A limiting projection 314 is formed on the surface of the seat frame 31 facing the connecting base 32. The limiting member 3414 can abut against the limiting projection 314 to restrict the movement of the reversal release member 341 in the second direction D2.

[0150] As shown in Figures 32 to 34, the reversal reset member 342 is housed within the storage cavity 334. The reversal reset member 342 is adapted to bias the reversal release member 341 toward the reversal locked position. The reversal reset member 342 includes an elastic member such as a spring or elastic piece. The first end of the reversal reset member 342 abuts against the wall of the storage cavity 334, and the second end of the reversal reset member 342 abuts against the reversal release member 341.

[0151] As an example, as shown in Figures 36, 38, and 39, the connecting base 32 includes a first housing 322 and a second housing 324. The first housing 322 has a third groove 323. The third groove 323 faces the movable base 33 (or seat frame 31). The shape of the third groove 323 conforms to the outer circumferential shape of the movable base 33. A first insertion hole 326 is defined at the bottom of the third groove 323. At least a portion of the movable base 33 is housed in the third groove 323, thereby engaging the movable base 33 with the connecting base 32 and being inserted into the first insertion hole 326 by the connecting shaft 333. For example, a portion of the disc-shaped portion 335 and a portion of the truncated cone portion 336 of the movable base 33 are housed in the third groove 323. The second housing 324 is connected to the seat assembly 2. Optionally, the second housing 324 is fixedly connected to the seat assembly 2. The second housing 324 and the first housing 322 surround the storage chamber 325, which is in communication with the third groove 323.

[0152] As shown in Figures 36 and 40, the first guide grooves 321 and the third grooves 323 are located on the same face of the connecting base 32. At least two first guide grooves 321 are provided, and the number of first guide grooves 321 may be a multiple of two. For example, there may be two, four, six, eight, or more first guide grooves 321. The number of first guide grooves 321 depends on the number of guide rails 312 and the angle by which the connecting base 32 (or seat assembly 2) needs to be rotated. In this embodiment, there are two guide rails 312 and four first guide grooves 321. In this embodiment, the third groove 323 is generally circular, and the four first guide grooves 321 are arranged circumferentially on the side walls of the third groove 323. The four first guide grooves 321 are arranged symmetrically around the axis of rotation R. The extending direction of each pair of first guide grooves 321 is the same as the extending direction of the corresponding guide rail 312. That is, at least two first guide grooves 321 whose extending directions coincide with each other are referred to as the same group of first guide grooves 321. In this embodiment, the four first guide grooves 321 are divided into two groups of guide grooves 321. The extending directions of the two groups of first guide grooves 321 are parallel to each other. Each group of first guide grooves 321 includes two first guide grooves 321. When the connecting base 32 is in the second moving position, one of each group of first guide grooves 321 is located at the rotating notch 3121, and the other of each group of first guide grooves 321 is located on the side of the second portion 3125 of the guide rail 312 that is away from the rotating notch 3121. In this case, the first guide grooves 321 are disengaged from the guide rail 312, and the connecting base 32 becomes rotatable relative to the movable base 33. When the connecting base 32 rotates 180 degrees, the first guide grooves 321 of each group of the first guide grooves 321 located at the outer end 3126 of the second portion 3125 rotate to the rotation notch 3121. When the connecting base 32 returns from the second movement position to the first movement position, the connecting base 32 engages with the first portion 3123 of the guide rail 312, and the first guide grooves 321 of each group of the first guide grooves 321 that were located at the rotation notch 3121 rotate to the side away from the rotation notch 3121 in the second portion 3125 of the guide rail 312.When the connecting base 32 moves from the second moving position to the first moving position, the connecting base 32 engages with the second portion 3125 of the guide rail 312.

[0153] In other embodiments not shown, an odd number of first guide grooves 321 may be provided, for example, one, three, five, or seven first guide grooves 321. The first guide grooves 321 are arranged circumferentially on the side walls of the third groove 323. Here, an embodiment with one first guide groove 321 is given for illustrative purposes. When the connecting base 32 is in the first moving position, the first guide groove 321 engages with, for example, one of the first portion 3123 or second portion 3125 of the guide rail 312. When the connecting base 32 moves to the second moving position, the first guide groove 321 is positioned at the rotation notch 3121 and disengaged from the first portion 3123, or the first guide groove 321 is positioned on the side of the second portion 3125 of the guide rail 312 away from the rotation notch 3121 and disengaged from the second portion 3125. In this case, the connecting base 32 becomes rotatable relative to the movable base 33. When the connecting base 32 rotates 180 degrees relative to the movable base 33, the first guide groove 321 rotates away from the rotating notch 3121 on the second portion 3125 of the guide rail 312, or rotates towards the rotating notch 3121 on the second portion 3125 of the guide rail 312. While the connecting base 32 moves from the second movable position to the first movable position, the first guide groove 321 engages with the second portion 3125 of the guide rail 312, or engages with the first portion 3123, to guide the connecting base 32 to move along the guide rail 312.

[0154] In other embodiments, if it is desired to rotate the connecting base 32 to a different angle, that is, to fix the connecting base 32 at a different inversion angle, a plurality of first guide grooves 321 can be provided on the connecting base 32. The plurality of first guide grooves 321 are arranged circumferentially on the side wall of the third groove 323.

[0155] An example is provided in which the sheet assembly 2 has four first guide grooves 321, and the inversion principle of the sheet assembly 2 in the embodiment of the present application is as follows.

[0156] As shown in Figure 30, when the connecting base 32 is in the first moving position, the reversal release member 341 is pressed to move from the reversal locked position to the reversal unlocked position, as shown in Figures 32 and 34. In this case, the first recess 3411 of the reversal release member 341 is located at the switching notch 3122 of the guide rail 312, allowing the guide rail 312 to pass through the first recess 3411, and enabling the reversal release member 341 to move in the second direction D2 relative to the guide rail 312. In this case, by pushing the seat assembly 2, connecting base 32, or movable base 33, the connecting base 32 moves to the second moving position together with the movable base 33 and the seat assembly 2, and the movable post 36 is driven to move in the third receiving groove 313 accordingly. At this time, two of the four first guide grooves 321 on the connecting base 32 move to the rotation notch 3121, and the remaining two first guide grooves 321 move to the side of the second portion 3125 of the guide rail 312 away from the rotation notch 3121. In this case, all first guide grooves 321 disengage from the guide rails 312, and the connecting base 32 becomes rotatable 360 ​​degrees relative to the movable base 33. When the connecting base 32 is in the second movable position, the seat assembly 2 or the connecting base 32 can be pushed to rotate 180 degrees or other desired angles relative to the movable base 33, so that each group of first guide grooves 321 and the corresponding guide rails 312 are aligned in the same straight line, and the first guide grooves 321 become re-engaged with the guide rails 312. In this case, when the external force applied to the seat assembly 2 or the connecting base 32 is removed, the elastic restoring force of the movable reset member 37 causes the movable post 36 to move to its initial position before the reversal release member 341 was pressed or pulled, and the movable base 33 drives the connecting base 32 to move along the guide rails 312. When the connecting base 32 moves to the first movement position, the first recess 3411 of the reversal release member 341 is positioned at the switching notch 3122, and the reversal release member 341 becomes movable in the second direction D2 relative to the guide rail 312.In this case, when the external force applied to the reversal lock release member 341 is removed, the elastic restoring force of the reversal reset member 342 causes the reversal lock release member 341 to move from the reversal lock release position to the reversal lock position, fixing the connecting base 32 at the angle after reversal.

[0157] When the seat assembly 2 described above is inverted, the seat assembly 2 can first move from a first position that is relatively rearward to a second position that is relatively forward, thereby avoiding interference between the child's legs and the pressure rod frame 400 during inversion. Therefore, the seat assembly 2 can be inverted directly without the child having to get off the seat assembly 2 while remaining seated on it.

[0158] In one embodiment, as shown in Figure 38, the seat locking device 3 further includes a second locking mechanism 35. The connecting base 32 is detachably connected to the movable base 33 by the second locking mechanism 35. The second locking mechanism 35 is positioned on the connecting base 32. The second locking mechanism 35 includes a separation locking member 351, a separation release member 352, and a separation reset member 353. The separation locking member 351 is engageable with the engagement groove 331 of the movable base 33 as described above. The separation release member 352 is drivably connected to the separation locking member 351. The separation release member 352 is operable to disengage the separation locking member 351 from the engagement groove 331.

[0159] As shown in Figures 39 and 43, the separation locking member 351 is movably positioned on the connecting base 32 and includes a hook portion 3511. The connecting base 32 is further provided with a first opening 327. A third groove 323 communicates with the housing chamber 325 through the first opening 327. At least a portion of the separation locking member 351 is housed in the housing chamber 325. The hook portion 3511 of the separation locking member 351 can extend through the first opening 327 to engage with the engagement groove 331. The separation locking member 351 is switchable between a separation lock position and a separation unlock position. When the separation locking member 351 is in the separation lock position, the hook portion 3511 can extend from the first opening 327 to engage with the engagement groove 331. When the separation locking member 351 is in the separation unlock position, the hook portion 3511 can be withdrawn from the engagement groove 331 to disengage from it. The separation locking member 351 further includes a wedge-shaped surface 3512. The wedge-shaped surface 3512 is located on the hook portion 3511. The wedge-shaped surface 3512 is adapted to move the separation locking member 351 from the separation lock position to the separation unlock position when pressed by the movable base 33. The disc-shaped portion 335 of the movable base 33 can move along the wedge-shaped surface 3512, straddle the hook portion 3511, and move between the bottom of the third groove 323 and the hook portion 3511. Subsequently, the separation locking member 351, which is not pressed by the movable base 33, moves to the separation lock position by the elastic force of the separation reset member 353 (details will be described later) and automatically engages with the engagement groove 331.

[0160] Furthermore, as shown in Figures 41 and 43, the separation lock member 351 includes a first separation lock member 351a and a second separation lock member 351b. The first separation lock member 351a is provided with a first projection 3513. The first projection 3513 is adapted to be drivably connected to a separation release member 352 in order to drive the separation lock member 351 to move. The second separation lock member 351b is provided with a second projection 3514. The side surface of the second projection 3514 forms a lock drive surface 3515. The lock drive surface 3515 is adapted to be drivably connected to a separation release member 352 in order to drive the second separation lock member 351b to move. The first movement direction DM1 of the first separation lock member 351a is positioned at an angle with respect to the second movement direction DM2 of the second separation lock member 351b. Two first separation lock members 351a are provided. The two first separation locking members 351a are arranged symmetrically with respect to the rotation axis R of the connecting base 32. Two second separation locking members 351b are provided. The two second separation locking members 351b are arranged symmetrically with respect to the rotation axis R of the connecting base 32. The two second separation locking members 351b and the two first separation locking members 351a are spaced apart from each other. Each first separation locking member 351a is positioned at an angle to the adjacent second separation locking member 351b, and this angle is approximately 90 degrees. That is, the angle between the first movement direction DM1 and the second movement direction DM2 is 90 degrees. In other embodiments not shown, at least two separation locking members 351, such as two, three, five, or six, may be provided. At least two separation locking members 351 are evenly distributed around the third groove 323 (see Figure 40), thereby more evenly distributing the forces when the connecting base 32 and the movable base 33 engage. The at least two separation locking members 351 may include only two first separation locking members 351a, or only at least two second separation locking members 351b.Alternatively, the locking members may include one first separation locking member 351a and at least one second separation locking member 351b, or one second separation locking member 351b and at least one first separation locking member 351a, and the present invention is not limited thereto.

[0161] As shown in Figures 39, 41, and 43, the separation and release member 352 includes a first separation and release member 352a and a second separation and release member 352b. The release drive surface 3523 includes a first release drive surface 3523a and a second release drive surface 3523b. The first separation and release assembly 352a includes the first release drive surface 3523a. The second separation and release member 352b includes the second release drive surface 3523b. The first separation and release member 352a and the second separation and release member 352b are arranged symmetrically with respect to the rotation axis R. The first separation and release member 352a and the second separation and release member 352b have exactly the same configuration. For the sake of explanation, the first separation and release member 352a will be described as an example. A second groove 3252 (see Figure 42) is further provided in the bottom wall of the housing chamber 325 of the connecting base 32. The second groove 3252 is a cross-shaped groove. Both separation and release members 352 are housed within the second groove 3252 and are movable along the second groove 3252, thereby defining the direction of movement of the two separation and release members 352 and restricting their movement.

[0162] As shown in Figures 41 to 43, the first separation unlocking member 352a includes a separation drive member 3525 and a separation operating section 3526. The connecting base 32 is provided with a second opening 328 that extends through the housing chamber 325. The separation operating section 3526 extends outside the housing chamber 325 through the second opening 328 so that it can be operated. The separation operating section 3526 is provided with an operating end 3528. The operating end 3528 extends from the separation operating section 3526 and extends away from the seat assembly 2, making it easier to grip and operate the separation operating section 3526. Referring to Figure 41, in some embodiments, the separation operating section 3526 is further provided with an operating hole 3527, which makes it easier to grip the separation operating section 3526. The separation drive member 3525 is located inside the housing chamber 325. When the separation operation unit 3526 is operated, it can drive the separation drive member 3525 to move within the housing chamber 325. The direction of movement of the separation release member 352 is parallel to the first movement direction DM1. A boss 329 is provided within the housing chamber 325. The boss 329 and the first insertion hole 326 are arranged coaxially. The first separation release member 352a is provided with a second insertion hole 3524. The second insertion hole 3524 has a substantially elliptical cross-section. The boss 329 is inserted into the second insertion hole 3524 and restricts the movement of the separation release member 352. The first separation release member 352a is "T" shaped overall.

[0163] Furthermore, as shown in Figures 41 and 43, the first separation lock release member 352a is provided with a first drive groove 3521 and a second drive groove 3522a. The first projection 3513 of the first separation lock member 351a is inserted into the first drive groove 3521 and is movable along the first drive groove 3521. The extending direction of the first drive groove 3521 is parallel to the first movement direction DM1. The groove wall of the second drive groove 3522a forms the first lock release drive surface 3523a. The first lock release drive surface 3523a is positioned at an angle such as 45 degrees with respect to the second movement direction DM2, and also at an angle such as 45 degrees with respect to the first movement direction DM1. The second projection 3514 of the second separation lock member 351b is inserted into the second drive groove 3522a. The unlocking drive surface 3523 is adapted to contact the locking drive surface 3515 so as to drive the second separation locking member 351b to move in the second movement direction DM2. Two second drive grooves 3522a are provided. The two second drive grooves 3522a are arranged symmetrically with respect to the rotation axis R. Correspondingly, two first unlocking drive surfaces 3523a are provided. Both first unlocking drive surfaces 3523a are provided on the separation drive member 3525 of the first separation unlocking member 352a and are arranged symmetrically with respect to the second insertion hole 3524. The first separation unlocking member 352a is drivenly connected to each of the two second separation locking members 351b by the two second drive grooves 3522a. Similarly, the second separation unlocking member 352b is provided with two second drive grooves 3522b. The groove walls of each second drive groove 3522b form a second unlock drive surface 3523b. The second separation unlock member 352b is drivenly connected to each of the two second separation lock members 351b by the two second drive grooves 3522b. Specifically, each first unlock drive surface 3523a abuts against the corresponding first lock drive surface 3515a, and each second unlock drive surface 3523b of the second separation lock member 352b abuts against the corresponding second lock drive surface 3515b of the second separation lock member 351b.

[0164] Referring to Figure 41, the separation drive member 3525 of the first separation unlocking member 352a overlaps at least partially with the separation drive member 3525 of the second separation unlocking member 352b. The first unlocking drive surface 3523a is positioned at an angle to the corresponding second unlocking drive surface 3523b. For example, the first unlocking drive surface 3523a and the corresponding second unlocking drive surface 3523b are positioned at a 90-degree angle. The second projection 3514 of each second separation locking member 351b is inserted into both the corresponding second drive groove 3522a of the first separation unlocking member 352a and the corresponding second drive groove 3522b of the second separation unlocking member 352b. The first locking drive surface 3515a of each second separation locking member 351b abuts against the corresponding first unlocking drive surface 3523a of the first separation unlocking member 352a. The second locking drive surface 3515b of each second separation locking member 351b abuts against the corresponding second unlocking drive surface 3523b of the second separation unlocking member 352b. That is, each second separation locking member 351b is driven to both the first separation unlocking member 352a and the second separation unlocking member 352b, and when the first separation unlocking member 352a and the second separation unlocking member 352b move away from or towards each other, the corresponding second separation locking member 351b is driven to move in the second movement direction DM2. This allows the second separation locking member 351b to move more smoothly in the second movement direction DM2. In other embodiments not shown, only one of the two second separation locking members 351b may be driven to the first separation unlocking member 352a, or the other of the two second separation locking members 351b may be connected to the second separation unlocking member 352b.

[0165] In one embodiment, as shown in Figures 39 and 43, the separation reset member 353 is positioned between the separation lock member 351 and the connecting base 32. The separation reset member 353 is adapted to bias the separation lock member 351 toward the separation lock position. The separation reset member 353 includes an elastic member such as a spring or elastic piece. In this embodiment, the separation reset member 353 is a compression spring. The separation reset member 353 is housed in a housing chamber 325. The first end of the separation reset member 353 abuts against the side wall 3251 of the housing chamber 325, and the second end of the separation reset member 353 abuts against the separation lock member 351. The number of separation reset members 353 corresponds to the number of separation lock members 351, so that each separation reset member 353 can bias the corresponding separation lock member 351 toward the separation lock position and further drive the corresponding separation unlock member 352 toward its initial position before operation. In other embodiments not shown, the number of separation reset members 353 may be less than the number of separation lock members 351. For example, there may be four separation lock members 351 and two separation reset members 353. The two separation reset members 353 each bias one of the adjacent first separation lock members 351a and one of the adjacent second separation lock members 351b to move toward the separation lock position, thereby moving the corresponding separation release member 352 to its initial position before operation. Furthermore, the other of the adjacent first separation lock member 351a and the other of the adjacent second separation lock member 351b are moved toward the separation lock position by the driving connection between the separation lock member 351 and the separation release assembly 352.

[0166] The principle of removing and installing the seat assembly 2 in the embodiment of this application is as follows.

[0167] When it is necessary to remove the seat assembly 2, the first separation release member 352a and the second separation release member 352b are pulled simultaneously, as shown in Figure 41, that is, the first separation release member 352a and the second separation release member 352b are operated to move away from each other in direction DM1. In this process, the first projection 3513 is inserted into the first drive groove 3521, so that the two first separation lock members 351a are driven to move away from each other in the first movement direction DM1, thereby separating the hook portions 3511 of the two first separation lock members 351a from the engagement grooves 331 of the movable base 33 (see Figure 38). Furthermore, since each first unlocking drive surface 3523a of the first separation unlocking member 352a abuts against the corresponding first locking drive surface 3515a of the first separation locking member 351a, and each second unlocking drive surface 3523b of the second separation unlocking member 352b abuts against the corresponding second locking drive surface 3515b of the first separation locking member 351a, the two second separation locking members 351b are driven to move away from each other in the second movement direction DM2, and as a result the hook portions 3511 of the two second separation locking members 351b are separated from the engagement groove 331, thereby achieving separation of the connecting base 32 from the movable base 33, and further separation of the seat assembly 2 from the frame 1. During the removal of the seat assembly 2, it is not necessary to operate the reversal unlocking member 341.

[0168] When the seat assembly 2 needs to be attached to the frame 1, the connecting base 32 and the movable base 33 are brought closer together, as shown in Figures 38 and 39, so that the movable base 33 is at least partially housed in the third recess 323 of the connecting base 32. In this process, the movable base 33 contacts the wedge-shaped surface 3512 of the separation locking member 351, driving the separation locking member 351 to move from the separation lock position to the separation release position. In this case, the disc-shaped portion 335 of the movable base 33 moves along the wedge-shaped surface 3512 and can move over the hook portion 3511 and position itself between the hook portion 3511 and the bottom of the third groove 323. When the movable base 33 moves away from the wedge-shaped surface 3512, the movable base 33 no longer presses against the wedge-shaped surface 3512, and the separation locking member 351, which is no longer pressed by the movable base 33, moves to the separation lock position by the elastic force of the separation reset member 353 and automatically engages with the engagement groove 331. This connects the connecting base 32 and the movable base 33 to each other, and the seat assembly 2 is attached to the frame 1.

[0169] The stroller of this invention has at least the following technical effects.

[0170] The stroller of this invention includes the frame 1 described above. The frame 1 described above can be driven by the folding mechanism 500 to rotate and fold the first wheel frame 100, the second wheel frame 200, and the pressure rod frame 400, providing excellent storage and portability. The handle portion 423 of the pressure rod frame 400 is drivenly connected to the unlock assembly 520 of the folding mechanism 500, so the user does not need to bend down when folding the frame 1, making operation simple and quick.

[0171] The stroller of this invention includes a seat locking device 3. By switching the first locking mechanism 34 between an unlocked state and a locked state, the connecting base 32 or the seat assembly 2 can be moved or fixed relative to the seat frame 31. When the first locking mechanism 34 is in the locked state, the connecting base 32 is in a first movable position and cannot be moved or rotated relative to the seat frame 31. When the first locking mechanism 34 is in the unlocked state, the connecting base 32 can move between a first movable position and a second movable position. When the connecting base 32 moves to the second movable position, the connecting base 32 becomes rotatable relative to the seat frame 31, so that the connecting base 32 can rotate together with the seat assembly 2 to a desired angle. In this case, by moving the connecting base 32 to the first movable position, the connecting base 32 becomes unable to rotate relative to the seat frame 31, fixing the connecting base 32 at a desired angle, and thereby fixing the seat assembly 2 at a desired angle as well. The reversal operation of the stroller and the seat locking device 3 is simple and can be easily performed.

[0172] In a stroller equipped with the seat locking device 3 of this invention, the connecting base 32 and the seat frame 31 can be attached and detached very easily simply by operating the second locking mechanism 35. This not only satisfies the need to invert the stroller but also satisfies the need to separate the seat assembly 2 from the stroller frame 1. The second locking mechanism 35 has a simple structure and is easy to operate.

[0173] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of these technical features are described in the embodiments. However, as long as such combinations do not result in any inconsistencies, they should be considered to be within the scope of this disclosure.

[0174] The embodiments described above are only a selection of the many embodiments of this disclosure, and although their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this disclosure. Anyone with ordinary skill in the art can make various modifications and improvements without departing from the principles of this disclosure, all of which fall within the scope of protection of this disclosure. Therefore, the patent protection of this disclosure shall be determined based on the attached claims. [Explanation of Symbols]

[0175] 1. Frame; 100, First wheel frame; 110, First support assembly; 111, First support rod; 112, First rotating base; 1121, First pivot; 1122, First connection; 1123, Second guide groove; 1124, Second limiting projection; 1125, Locking recess; 120, First connecting rod; 200, second wheel frame; 210, second support assembly; 211, second support rod; 212, second rotation base; 2121, third limiting projection; 2122, mounting post; 2123, mounting groove; 220, second connecting rod; 2. Seat assembly; 3. Seat locking device; 31, seat frame; 311, support section; 312, guide rail; 3121, rotation notch; 3122, switching notch; 3123, first section; 3124, second section; 3125, third section; 3126, outer end; 3127, chamfered or rounded corner; 313, third receiving groove; 314, limiting protrusion; 315, mounting section; 3151, storage groove; 3152, through hole; 3153, mounting post; 32, connecting base; 321, first guide groove; 322, first housing; 323, third groove; 324, second housing; 325, housing chamber; 3251, side wall of housing chamber; 3252, second groove; 326, first insertion hole; 327, first opening; 328, second opening; 329, boss; 33, movable base; 331, engaging groove; 332, second guide groove; 333, connecting shaft; 334, storage cavity; 335, disc-shaped part; 336, truncated cone part; 337, through opening; 34, First locking mechanism; 341, Reversal lock release member; 3411, First recess; 3412, Positioning groove; 3413, Reversal operation section; 3414, Restricting member; 342, Reversal reset member; 343, Positioning pin; 35, Second locking mechanism; 351, Separation locking member; 351a; First separation locking member; 351b, Second separation locking member; 3511, Hook portion; 3512, Wedge-shaped surface; 3513, First projection; 3514, Second projection; 3515, Locking drive surface; 3515a, First locking drive surface; 3515b, Second locking drive surface; 352, Separation unlocking member; 352a, First separation unlocking member; 352b, Second separation unlocking member; 3521, First drive groove; 3522a / 3522b, Second drive groove; 3523, Unlocking drive surface; 3523a, First unlocking drive surface; 3523b, Second unlocking drive surface; 3524, Second insertion hole; 3525, Separation drive member; 3526, Separation operation section; 3527, Operation hole; 353, Separation reset member; 36. Movable post; 37. Movement reset member; 400, Pressing rod frame; 410, Pressing rod assembly; 411, First pressing rod; 411a, Storage cavity; 412, Second pressing rod; 413, Pivot base; 4131, Second pivot part; 4132, Second connection part; 4133, First housing cavity; 4135, First limiting projection; 414, Guide base; 414a, First groove; 420, Handle assembly; 421, Connecting sleeve; 4211, First sleeve part; 4212, Second sleeve part; 4212a, Insertion opening; 4212b, Contact boss; 4212c, Operating hole; 4212d, First mounting recess; 422, Handle body; 423, Handle part; 4231, Connecting projection; 424, Cover; 500, Folding mechanism; 510, Rotating shaft; 520, Lock release assembly; 521, Locking member; 5211, Reset cavity; 5212, Contact wall; 5213, First coupling post; 522, Drive member; 5221, Connecting groove; 5222, Second mounting recess; 523, Tension member; 524, First reset member; 525, Safety lock release member; 5251, Moving part; 5252, Operating part 526, Restricting member; 5261, Second coupling post; 527, Second reset member; 530, Connecting assembly; 531, First connecting rod; 532, Second connecting rod; 533, Third connecting rod; 534, Drive shaft; 535, Sun gear; 536, Rotating plate; 5361, First guide groove; 5362, Toothed edge; 5363, First end; 5364, Second end; 537, Planetary gear; 610, length adjustment mechanism; 611, second lock hole; 612, second lock pin; 613, length adjustment operating member; 614, connecting member; 615, fourth reset member; 617b, second drive pin; 620, seat height adjustment mechanism; 621, first lock hole; 622, first lock pin; 623, height adjustment operating member; 6231, operating end; 6232, pivot end; 6233, contact groove; 624, third reset member; 710, fastener; 720, pivot member; R, rotation axis; D1, first direction; D2, second direction; DM1, first movement direction; DM2, second movement direction

Claims

1. Including a frame, the frame is First wheel frame including first support assembly, Second wheel frame including second support assembly, A pressing rod frame including a pressing rod assembly, and Folding mechanism including connecting assembly and rotating shaft, Includes, The first support assembly and the second support assembly and the pressing rod assembly are pivotably connected via the rotating shaft, The first support assembly and the second support assembly are rotatable and foldable relative to the pressing rod assembly via the connecting assembly. The aforementioned connecting assembly includes a first connecting rod, a second connecting rod, and a third connecting rod. The first end of the first connecting rod is rotatably connected to the pressing rod assembly, The first end of the second connecting rod is rotatably connected to the second end of the first connecting rod, and the second end of the second connecting rod is rotatably connected to the first support assembly. The first end of the third connecting rod is rotatably connected to the second end of the first connecting rod, and the second end of the third connecting rod is rotatably connected to the second support assembly. stroller.

2. The pressing rod frame further includes a handle assembly, The folding mechanism further includes an unlocking assembly that is drivenly connected to the handle assembly, The handle assembly is operable to unlock the release assembly, thereby allowing the first support assembly and the second support assembly to rotate and fold relative to the press rod assembly via the connecting assembly. The stroller according to claim 1.

3. The first support assembly includes a first rotating base having a locking recess, and the unlocking assembly includes a locking member, wherein when the locking member is in the locked state, the locking member is inserted into the locking recess, thereby fixing the pressing rod assembly and the first support assembly together, and when the unlocking assembly is in the unlocked state, the locking member is separated from the locking recess, and the pressing rod assembly is rotatable relative to the first support assembly. Optionally, the unlocking assembly further, A drive member is positioned on the pressing rod assembly and is ductively connected to the handle assembly, A tension member, the drive member and the locking member, respectively, with both ends connected to them, Includes, The handle assembly is operable to drive the drive member to move and to drive the lock member to separate it from the lock recess by the tension member. The stroller according to claim 2.

4. The handle assembly includes a handle body and a handle portion rotatably disposed on the handle body, and the drive member is connected to the handle portion and rotatable together with the handle portion. Optionally, The unlocking assembly further includes a safety unlocking member movable between a first position and a second position, wherein when the safety unlocking member is in the first position, the handle portion cannot be driven to move the drive member even when operated, and when the safety unlocking member is in the second position, the handle portion can be driven to move the drive member when operated. Furthermore, optionally, The unlocking assembly further includes a limiting member movably disposed on the pressing rod frame, wherein when the safety unlocking member is in the first position, the limiting member restricts the movement of the drive member, and when the safety unlocking member is in the second position, the limiting member does not restrict the movement of the drive member, and the safety unlocking member is movable from the first position to the second position. The stroller according to claim 3.

5. A sheet frame positioned on the aforementioned pressing rod frame, A seat assembly placed on the aforementioned seat frame, A seat height adjustment mechanism between the pressing rod frame and the seat frame, It further includes, The seat frame is movable along the pressing rod assembly, The aforementioned seat height adjustment mechanism has a locked state and an unlocked state. When the seat height adjustment mechanism is in the locked state, the seat frame and the pressure rod assembly are fixed to each other. When the seat height adjustment mechanism is in the unlocked state, the seat frame becomes movable relative to the pressing rod assembly so that the height of the seat assembly can be adjusted. The stroller according to claim 1.

6. A sheet frame positioned on the aforementioned pressing rod frame, A seat height adjustment mechanism between the pressing rod frame and the seat frame, It further includes, The aforementioned seat height adjustment mechanism is A plurality of first locking holes arranged in the pressing rod assembly, A first locking pin is positioned on the seat frame and is movable between a third position and a fourth position, Includes, When the first lock pin is in the third position, the first lock pin is inserted into one of the plurality of first lock holes, and when the first lock pin is in the fourth position, the first lock pin is separated from the first lock hole. Optionally, The aforementioned seat height adjustment mechanism further includes a height adjustment operating member, The height adjustment operating member is A pivot end pivotably connected to the first lock pin, An operating end that can be operated by the pivot end to drive the first lock pin to the fourth position, including, The stroller according to claim 1.

7. The length of the aforementioned pressing rod assembly is adjustable. Optionally, The stroller further includes a length adjustment mechanism, and the pressing rod assembly includes a first pressing rod and a second pressing rod, wherein the first pressing rod is at least partially inserted into the second pressing rod. The length adjustment mechanism is, Multiple second locking holes provided in the second pressing rod, A second locking pin is located on the first pressing rod and is movable between the fifth and sixth positions. Includes, When the second lock pin is in the fifth position, the second lock pin is inserted into one of the plurality of second lock holes, and when the second lock pin is in the sixth position, the second lock pin is separated from the second lock hole. Furthermore, optionally, The length adjustment mechanism includes a length adjustment operating member disposed on the first pressing rod and drivably connected to the second lock pin, the length adjustment operating member being operable to drive the second lock pin to the sixth position. The stroller according to claim 1.

8. A sheet frame positioned on the aforementioned pressing rod frame, A seat assembly placed on the aforementioned seat frame, A connecting base disposed on the seat assembly and movably connected to the seat frame, having a first movable position and a second movable position, wherein when the connecting base is in the first movable position, the connecting base is immobile relative to the seat frame, and when the connecting base is in the second movable position, the connecting base is rotatable relative to the seat frame, and A first locking mechanism that can be switched between an unlocked state and a locked state, It further includes, When the first locking mechanism is in the unlocked state, the connecting base is movable between a first movable position and a second movable position relative to the seat frame, and when the first locking mechanism is in the locked state, the connecting base is immovable relative to the seat frame. The stroller according to claim 1.

9. A first wheel frame including a first support assembly, A second wheel frame including a second support assembly, A pressing rod frame including a pressing rod assembly, A folding mechanism including a connecting assembly and a rotating shaft, Includes, The first support assembly and the second support assembly and the pressing rod assembly are pivotably connected via the rotating shaft, and the first support assembly and the second support assembly are rotatable and foldable relative to the pressing rod assembly via the connecting assembly. The aforementioned connecting assembly is The sun gear fixed to the aforementioned pressing rod assembly, A rotating plate fixed to the first support assembly, having a first guide groove, the first guide groove including a toothed edge, The aforementioned sun gear and the planetary gear that meshes with the toothed edge, A drive shaft is positioned eccentrically with respect to the rotating shaft and extends through the second support assembly, the planetary gear and the pressing rod assembly, Includes, The second support assembly is pivotably connected to the pressing rod assembly by the drive shaft. Frame.

10. The drive shaft is fixedly connected to the second support assembly and the planetary gear, and is rotatable relative to the pressing rod assembly. Optionally, The toothed edge portion is arc-shaped and arranged along the circumferential direction of the rotating plate. Furthermore, optionally, The toothed edge includes a first end and a second end, and restricts the movement of the planetary gear between the first end and the second end. The frame according to claim 9.

11. A seat locking device configured to connect the frame and the seat assembly, A seat frame connected to the aforementioned frame, A connecting base disposed on the seat assembly and movably connected to the seat frame, having a first movable position and a second movable position, wherein when the connecting base is in the first movable position, the connecting base is immobile relative to the seat frame, and when the connecting base is in the second movable position, the connecting base is rotatable relative to the seat frame, and including, Seat locking device.

12. It further includes a first locking mechanism that can be switched between an unlocked state and a locked state, When the first locking mechanism is in the unlocked state, the connecting base is movable between a first movable position and a second movable position relative to the seat frame, and when the first locking mechanism is in the locked state, the connecting base is immovable relative to the seat frame. The seat locking device according to claim 11.

13. The seat frame is provided with guide rails, and the surface of the connecting base facing the seat frame is provided with a first guide groove that can engage with the guide rails. The connecting base is movable along the guide rail between the first moving position and the second moving position. When the connecting base is in the first movable position, the first guide groove engages with the guide rail so that the connecting base is non-rotatable relative to the seat frame, and when the connecting base is in the second movable position, the first guide groove disengages from the guide rail so that the connecting base is rotatable relative to the seat frame. The seat locking device according to claim 11.

14. Further equipped with a first locking mechanism, The first locking mechanism includes an inverted unlocking member that is operablely positioned between the seat frame and the connecting base and is switchable between an inverted unlocked position and an inverted locked position. When the reversal release member is in the reversal lock position, the reversal release member abuts against the guide rail so as to be immobile along the guide rail, restricting the movement of the connecting base along the guide rail; when the reversal release member is in the reversal release position, the reversal release member is movable along the guide rail so as to be movable relative to the seat frame. The seat locking device according to claim 13.

15. The guide rail includes a switching notch, and when the connecting base is in the first moving position, the reversal lock release member is inserted into the switching notch and is switched between the reversal lock release position and the reversal lock position. and / or, The reversal release member includes a strip-shaped positioning groove, and the first locking mechanism further includes a positioning pin, the positioning pin being insertable into the positioning groove such that the reversal release member is movable relative to the positioning pin in a direction intersecting the extending direction of the guide rail, and is movable in the extending direction of the guide rail in synchronization with the positioning pin. The seat locking device according to claim 14.

16. The system further includes a movable reset member and a movable post, the movable post being connected between the connecting base and the seat frame and movable relative to the seat frame, the movable reset member being connected to the movable post and the seat frame respectively, and the movable reset member being adapted to bias the movable post so as to drive the connecting base to move to the first movable position. The seat locking device according to claim 11.

17. The guide rail is provided with a rotating notch configured for the connection base to rotate, and when the connection base is in the second moving position, the first guide groove is positioned in the rotating notch so that the connection base can rotate relative to the seat frame. and / or, The guide rail includes a first portion and a second portion, the rotating notch is formed between the first portion and the second portion, and when the connecting base is in the second moving position, the first guide groove is positioned in the rotating notch so that the connecting base is rotatable relative to the seat frame, and when the connecting base is in the first moving position, at least a portion of the first guide groove engages with the first portion so that the connecting base is not rotatable relative to the seat frame. The seat locking device according to claim 11.

18. The connection base further includes a movable base and a second locking mechanism, wherein the connecting base is connected to the seat frame by the movable base and detachably connected to the movable base by the second locking mechanism. Optionally, The movable base is provided with an engagement groove, The second locking mechanism is, A separation locking member, including a hook portion, is movably disposed on the connection base, wherein the separation locking member is switchable between a separation lock position and a separation unlock position, and when the separation locking member is in the separation lock position, the hook portion engages with the engagement groove, and when the separation locking member is in the separation unlock position, the hook portion disengages from the engagement groove. A separation lock release member is connected to the separation lock member in a driving manner, Includes, The separation lock release member is operable to drive the separation lock member from the separation lock position to the separation lock release position. The seat locking device according to claim 11.

19. The separation locking member includes a first separation locking member, and one of the first separation locking member and the separation unlocking member is provided with a first projection, and the other of the first separation locking member and the separation unlocking member is provided with a first drive groove, the first projection is inserted into the first drive groove and cooperates with the first drive groove to drive the first separation locking member to move between the separation locking position and the separation unlocking position, and the direction of extension of the first drive groove is parallel to the direction of movement of the separation unlocking member. and / or, The separation locking member includes a second separation locking member provided with a locking drive surface, the separation unlocking member is provided with an unlocking drive surface, the unlocking drive surface is capable of contacting the locking drive surface so as to drive the second separation locking member to switch between the separation locking position and the separation unlocking position, and the extending direction of the unlocking drive surface intersects with the movement direction of the separation unlocking member. The seat locking device according to claim 18.

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