Handrail mounting unit

Abstract

The utility model relates to a handrail installation unit, include: first connecting seat is provided with the matching card part, first magnetic attraction spare is located first connecting seat, second connecting seat is provided with the carding spare, and second magnetic attraction spare is located second connecting seat, first connecting seat with second connecting seat pass through the detachable carding of matching card part with carding spare and the magnetic adsorption of first magnetic attraction spare with second magnetic attraction spare can detachably connect.

Description

[0001] Divisional application statement

[0002] This application is a divisional application of Chinese utility model patent application filed on March 5, 2024, entitled “Vehicle”, with application number 2024205933998. Technical Field

[0003] This utility model relates to a vehicle, a handrail mounting unit, and a height adjustment mechanism. Background Technology

[0004] Vehicles such as strollers, high chairs, and tricycles are increasingly used in households where they are needed. However, several problems exist with current market offerings. Taking strollers as an example, while most stroller frames have a folding function for easy storage and transport, the folding mechanism is complex and inconvenient to use. Furthermore, during the folding process, the backrest frame is prone to wobbling towards the seat frame due to the pushing force. Some stroller handles can be reversed for easier childcare, but this reversal causes movement of the seat assembly, altering the angle between the seat and backrest components, making adjustments difficult. Strollers typically have a detachable armrest body connected to the handlebar, but the current detachable connection structure between the armrest body and handlebar is quite complex. Strollers and other vehicles may be equipped with footrests. Due to the different leg lengths and sitting postures of different passengers, it is often necessary to move and adjust the footrests, especially in the height direction, to reduce the pressure on the passenger's legs and improve riding comfort. However, existing height adjustment mechanisms are often complex in structure and inconvenient to operate, making it difficult to meet the needs of consumers. Utility Model Content

[0005] A first aspect of this utility model provides a vehicle, comprising: a backrest assembly; a frame switchable between a folded state and an unfolded state; a seat assembly movably disposed on the frame; and a linkage assembly movably connected to the frame, the seat assembly, and the backrest assembly, respectively. When the frame is switched from the unfolded state to the folded state, the linkage assembly can drive the backrest assembly to fold towards the seat assembly.

[0006] In some embodiments, the linkage assembly includes a first link and a second link. The first link has a first movable portion and a first pivot portion. The first movable portion is movably connected to the seat assembly, and the first pivot portion is pivotally connected to the vehicle frame. The second link has a second movable portion and a second pivot portion. The second movable portion is movably connected to the first link, and the second pivot portion is pivotally connected to the backrest assembly.

[0007] In some embodiments, the frame includes a seat tube extending in the longitudinal direction of the vehicle, and the seat assembly includes a movable frame slidably disposed on the seat tube, the first movable portion being movably connected to the movable frame.

[0008] In some embodiments, the movable frame is provided with a connecting part, the connecting part is provided with a guide groove, and the first movable part is inserted into the guide groove and can move along the guide groove.

[0009] In some embodiments, the guide groove includes a first groove portion and a second groove portion that are interconnected, the first groove portion extending along the moving direction of the movable frame, and the extending direction of the second groove portion intersecting the extending direction of the first groove portion.

[0010] In some embodiments, the guide groove has a first end and a second end. When the frame is in an extended state, the first movable part is located at the first end, and when the frame is in a retracted state, the first movable part is located at the second end.

[0011] In some embodiments, the connecting portion is provided with a slot, and the guide groove is disposed on one side wall or two opposite side walls of the slot and penetrates the one side wall or two opposite side walls. The first movable portion extends into the connecting portion through the slot and is slidably connected to the guide groove.

[0012] In some embodiments, the frame includes a pusher arm pivotally connected to the seat post, the pusher arm being operable to rotate relative to the seat post to switch the vehicle's direction of travel between a first forward direction and a second forward direction. When the vehicle's direction of travel switches from the first forward direction to the second forward direction, the pusher arm drives the movable frame to move along the seat post toward the first forward direction, and / or the first link moves toward the second forward direction.

[0013] In some embodiments, the movable frame has a locking part. When the frame is in the unfolded state, the locking part engages with the second movable part. During the rotation and reversal of the pusher frame, the locking part disengages from the second movable part.

[0014] In some embodiments, the first link has a drive groove located between the first movable portion and the first pivot portion, and the second movable portion is inserted into the drive groove and can slide along the drive groove.

[0015] In some embodiments, the backrest assembly includes a first backrest frame, a second backrest frame, and a backrest tube. A first end of the first backrest frame is pivotally connected to a second pivot portion of the second connecting rod. A second end of the first backrest frame is pivotally connected to a first end of the second backrest frame. A second end of the second backrest frame is pivotally connected to a first end of the backrest tube. The second end of the backrest tube, the portion of the second connecting rod located between the second movable portion and the second pivot portion, and the movable frame are pivotally connected via a first connecting shaft.

[0016] In some embodiments, the second link includes a first link portion and a second link portion connected to each other, the first link portion and the second link portion forming an angle with each other, the second movable portion being located at the end of the first link portion away from the second link portion, the second pivot portion being located at the second link portion, and the first connecting shaft being located at the connection between the first link portion and the second link portion.

[0017] In some embodiments, the backrest assembly further includes a connecting strap and a strap adjuster. The linkage assembly is provided on both the left and right sides of the frame. One end of the connecting strap is connected to the end of the second rod portion on one side of the frame away from the first rod portion. The other end of the connecting strap passes around the side of the backrest tube facing away from the seat assembly and is connected to the end of the second rod portion on the other side of the frame away from the first rod portion. The strap adjuster is provided on the connecting strap for adjusting the length of the connecting strap.

[0018] In some embodiments, the backrest assembly further includes a limiting piece, which is pivotally connected between the backrest tube and the second connecting rod via the first connecting shaft.

[0019] In some embodiments, the frame includes a pusher frame and an auxiliary frame movably connected to the pusher frame, the linkage assembly is pivotally connected to the auxiliary frame, and the pusher frame can be operated to retract the frame and, through the auxiliary frame and the seat assembly, drive the linkage assembly to retract the backrest assembly toward the seat assembly.

[0020] A second aspect of this utility model provides a carrier, comprising: a foldable frame; a limiting block disposed on the frame and having a telescopic portion; a movable frame disposed on the frame; and a backrest frame disposed on the frame and having a movable end. When the frame switches from an extended state to a folded state, the backrest frame rotates in a first direction to approach the movable frame, and the telescopic portion is adapted to abut against the movable end to apply a rotational force to the backrest frame in a second direction, wherein the first direction is opposite to the second direction.

[0021] In some embodiments, the limiting block further includes a body portion fixed to the vehicle frame. The telescopic portion includes: a slider, which slidably engages with the body portion for abutting against the movable end; and an elastic reset member, which is held between the body portion and the slider.

[0022] In some embodiments, the body portion has a guide groove, the telescopic portion is installed in the guide groove, and the slider can elastically extend and retract relative to the opening of the guide groove under the action of the elastic reset member.

[0023] In some embodiments, the bottom of the guide groove opening has an outwardly protruding extended support portion, and / or a limiting protrusion is provided on the upper part or above the guide groove opening.

[0024] In some embodiments, a limiting mechanism is provided between the slider and the body portion, the limiting mechanism being used to limit the sliding stroke of the slider. The limiting mechanism includes: a limiting hole disposed on one of the guide groove wall and the slider; and a limiting protrusion disposed on the other of the guide groove wall and the slider; the limiting protrusion slidingly engaging with the limiting hole.

[0025] In some embodiments, the body portion has a first end face; when the frame is in the unfolded state, the first end face abuts against the movable end to restrict the rotation of the backrest.

[0026] In some embodiments, the first end face is located above the telescopic portion, and / or a limiting protrusion is formed at the intersection of the end face of the guide groove opening and the first end face.

[0027] In some embodiments, the limiting block further includes a body portion fixed to the vehicle frame. The telescopic portion is mounted on the body portion and is elastically deformable.

[0028] In some embodiments, the movable frame is movably mounted on the vehicle frame. When the vehicle frame is in the extended state, the movable end is adapted to be clamped between the limiting block and the movable frame. When the vehicle frame switches to the retracted state, the movable frame moves away from the limiting block to allow the backrest to rotate.

[0029] In some embodiments, the frame includes a seatpost, the limiting block is fixed to the seatpost, the movable frame is slidably engaged with the seatpost, and the backrest is pivotally connected to the movable frame. The frame also includes a pusher frame and a linkage assembly, wherein rotation of the pusher frame drives the movable frame to move along the seatpost via the linkage assembly.

[0030] In some embodiments, the linkage assembly includes a linkage mechanism and a pivot pin. The linkage mechanism includes a first link and a second link. The first link and the pusher frame are both mounted on the pivot pin, and the second link is pivotally connected to the movable frame. When the pusher frame rotates, it drives the first link to rotate via the pivot pin. The limiting block also includes a body portion with a hole through which the pivot pin passes to limit the relative movement between the limiting block and the seat tube.

[0031] A third aspect of this utility model provides a vehicle, comprising: a frame; a seat assembly mounted on the frame and movable relative to the frame in a longitudinal direction between a first position and a second position; a backrest assembly mounted on the seat assembly and angularly adjustable relative to the seat assembly; a push handle pivotally connected to the frame and driving the seat assembly to move relative to the frame in a longitudinal direction when pivoted relative to the frame; and a linkage mechanism disposed on one side of the seat assembly and connected to the backrest assembly, the linkage mechanism causing the backrest assembly to have the same angular adjustment range relative to the seat assembly when the seat assembly is in the first position and the second position.

[0032] In some embodiments, the backrest assembly includes a backrest tube and a strap, the bottom of the backrest tube being pivotally connected to the seat assembly, the end of the strap being connected to the linkage mechanism, and the backrest tube being supported on the strap. The linkage mechanism is also connected to the seat assembly and causes the end of the strap to move synchronously with the seat assembly in the fore-and-aft direction along the vehicle frame.

[0033] In some embodiments, the linkage mechanism includes a linkage rod, a first end of which is connected to the seat assembly, and a second end of which is connected to the end of the strap. When the seat assembly moves along the front-rear direction of the vehicle frame, the seat assembly drives the end of the strap to move along the front-rear direction of the vehicle frame via the linkage rod.

[0034] In some embodiments, the frame includes two side frames and a seatpost mounted between the two side frames. The seat assembly includes a movable frame mounted on the seatpost, the pusher arm driving the movable frame to move relative to the seatpost in the fore-aft direction of the frame when pivoted relative to the frame. A first end of a linkage is connected to the movable frame, and a second end of the linkage is movably connected to the side frames in the fore-aft direction of the frame. When the movable frame moves relative to the seatpost in the fore-aft direction of the frame, the movable frame drives the end of the strap to move in the fore-aft direction of the frame via the linkage.

[0035] In some embodiments, the linkage rod is disposed between the movable frame and the lateral frame, and the movable frame has a recess on the side facing the linkage rod, with the first end of the linkage rod received in the recess.

[0036] In some embodiments, the linkage rod has a first protrusion on the side facing the movable frame, and the recess of the movable frame has a groove or through hole, the first protrusion being received in the groove or through hole.

[0037] In some embodiments, the movable frame is provided with a second protrusion on the side opposite to the linkage rod, and the linkage mechanism further includes an elastic element, one end of which is arranged around the periphery of the second protrusion, and the other end of which is hooked onto the side of the linkage rod opposite to the movable frame.

[0038] In some embodiments, the backrest assembly includes a backrest tube and a strap, the bottom of the backrest tube being pivotally connected to the seat assembly, the end of the strap being connected to the linkage mechanism, and the backrest tube being supported on the strap. The linkage mechanism includes a transmission assembly and a slider, the slider being movably mounted to the frame in the fore-and-aft direction and connected to the end of the strap. The transmission assembly is connected to both the push-arm bracket and the slider, and is capable of converting rotation of the push-arm bracket into movement of the slider in the fore-and-aft direction of the frame, thereby causing the end of the strap to move synchronously with the seat assembly in the fore-and-aft direction of the frame.

[0039] In some embodiments, the slider includes a sliding portion and a connecting portion, the connecting portion being connected to the transmission assembly, the sliding portion being fixedly connected to the end of the belt, and the transmission assembly driving the sliding portion to move along the front-rear direction of the vehicle frame via the connecting portion.

[0040] In some embodiments, the transmission assembly includes a linkage gear, the slider is provided with teeth, the pusher is fixedly connected to a pivot shaft passing through the frame, the pivot shaft is connected to the linkage gear and can drive the linkage gear to rotate, the linkage gear meshes with the slider, and the rotation of the linkage gear can cause the slider to move along the front-rear direction of the frame.

[0041] In some embodiments, the transmission assembly further includes a driven gear and an output gear, wherein the driven gear meshes with the slider via the driven gear; and the driven gear meshes with the slider via the output gear.

[0042] In some embodiments, the linkage mechanism further includes a traction member and a drive wheel. The drive wheel is sleeved on the pivot shaft and can rotate with the pivot shaft. The traction member is connected to the drive wheel and the linkage gear respectively. When the drive wheel rotates, it can drive the linkage gear to rotate through the traction member.

[0043] In some embodiments, the traction element is a cable, one end of which is fixed to a first position of the linkage gear, and the other end of which extends to the drive wheel, passes around the drive wheel, extends back to the linkage gear, and is fixed at a second position opposite to the first position. The portion of the cable wound around the drive wheel is also fixed to a certain position of the drive wheel. When the drive wheel rotates, the lengths of the cable portions on both sides of the drive wheel and the linkage gear change, thereby causing the linkage gear to rotate as well.

[0044] In some embodiments, the vehicle frame has a cavity, and the vehicle further includes a mounting base disposed within the cavity. The mounting base includes a housing, and a baffle is provided on the inner wall of the housing, dividing the housing into a first accommodating space and a second accommodating space. The sliding portion of the sliding member is disposed in the first accommodating space and slidably disposed on the baffle. The transmission assembly is disposed in the second accommodating space. The mounting base also includes a cover, which is mounted to the housing and together with the housing defines the second accommodating space. The transmission assembly is disposed between the cover and the housing. One end of the connecting portion extends beyond the upper end of the cover and onto the outside of the cover. The cover has an opening, through which the transmission assembly connects to the connecting portion.

[0045] In some embodiments, the frame includes two side frames, the seat assembly is mounted between the two side frames, the side frames are provided with a groove extending in the longitudinal direction of the frame, the end of the strap is slidably mounted to the groove, and the linkage mechanism causes the end of the strap to slide in the groove in the longitudinal direction of the frame when the pusher arm pivots relative to the frame.

[0046] In some embodiments, the backrest assembly includes a backrest tube and a strap. The bottom of the backrest tube is pivotally connected to the seat assembly, and the end of the strap is connected to the linkage mechanism. The backrest tube is supported on the strap. The linkage mechanism includes a guide and a connector. The guide is attached to the vehicle frame. The end of the strap passes through the guide and connects to the connector. The connector is connected to the seat assembly and can move with the seat assembly in the fore-and-aft direction along the vehicle frame. Thus, the strap drives the backrest tube to move synchronously with the seat assembly. The connector can be a separate connector or integrally formed with the strap.

[0047] A fourth aspect of this utility model provides a handrail mounting unit, comprising: a first connecting seat with a latching portion; a first magnetic member disposed on the first connecting seat; a second connecting seat with a locking member; and a second magnetic member disposed on the second connecting seat. The first connecting seat and the second connecting seat are detachably connected by the detachable locking of the latching portion and the locking member, and by the magnetic attraction of the first magnetic member and the second magnetic member.

[0048] In some embodiments, the second connector has a first receiving space and an insertion hole communicating with the first receiving space, and the engaging member includes at least one first resilient arm located in the first receiving space. The dispensing portion is adapted to enter or exit the first receiving space through the insertion hole. The dispensing portion is provided with at least one engaging groove for detachably engaging with the at least one first resilient arm.

[0049] In some embodiments, the card-attaching portion includes a protrusion, and the at least one engaging slot is disposed on the protrusion. The protrusion is adapted to extend into the second connector to allow the at least one engaging slot to engage with the at least one first resilient arm.

[0050] In some embodiments, the first connector is provided with an anti-rotation platform, which is non-rotatably fitted into the insertion hole. A protrusion is disposed on the anti-rotation platform, and the first connector has a first receiving cavity located within the protrusion. The first magnetic member is installed in the first receiving cavity.

[0051] In some embodiments, the at least one engaging groove includes an annular groove disposed on the outer peripheral wall of the protrusion. The at least one first elastic arm includes two first elastic arms disposed opposite to each other and forming a second receiving space for accommodating the protrusion. When the protrusion is located in the second receiving space, the two first elastic arms hold the annular groove.

[0052] In some embodiments, a support is provided in the first receiving space of the second connecting seat, the first ends of the two first elastic arms are connected by a fixing part, the fixing part is fixed to the support, the second ends of the two first elastic arms are opposite to each other and spaced apart, the support is provided with a spacer, the spacer is close to the first ends of the two first elastic arms and located between them, and the spacer is adapted to abut against the two first elastic arms.

[0053] In some embodiments, the second connector is further provided with a release member and a resilient reset member; wherein the release member is operably connected to the engaging member and is used to push the at least one first resilient arm to disengage from the at least one engaging groove; the resilient reset member is used to drive the release member to reset.

[0054] In some embodiments, the unlocking member has at least one pushing portion, and the at least one elastic arm has at least one abutting portion, each of the pushing portions being adapted to push against the corresponding abutting portion to disengage the at least one first elastic arm from the at least one engaging groove.

[0055] In some embodiments, a boss is provided in the receiving space, the boss has a guide surface opposite to the abutment, the pushing part is sandwiched between the guide surface and the abutment, and the pushing part has a sliding surface that slides with the guide surface.

[0056] In some embodiments, the first connecting seat includes a connecting body and a mounting base; the mounting base is mounted to the connecting body by a fastening mechanism, or the mounting base and the connecting body are integrally formed. The card-attaching part is disposed on the mounting base. The connecting body is integrally formed with or attached to the handrail. The second connecting seat is pivotally connected to the handrail body by a pivot, the axis of which is perpendicular to the insertion / removal direction of the card-attaching part.

[0057] The fifth aspect of this utility model provides a vehicle height adjustment mechanism, comprising: a front foot support assembly; a foot pedal capable of sliding along the front foot support assembly in the height direction; and a locking assembly disposed between the front foot support assembly and the foot pedal, the locking assembly being switchable between a locked state and an unlocked state; when the locking assembly is in the locked state, the foot pedal is fixed at a certain height position relative to the front foot support assembly, and / or, the foot pedal can be operated to move along a first direction; when the locking assembly is in the unlocked state, the foot pedal can be operated to move along the first direction or a second direction; the first direction and the second direction are opposite and both parallel to the height direction.

[0058] In some embodiments, the locking assembly includes: a first locking groove disposed on the forefoot support assembly, the first locking groove being a unidirectional locking groove for restricting the foot pedal from moving in the second direction, and / or a second locking groove disposed on the forefoot support assembly, the second locking groove being a bidirectional locking groove for restricting the foot pedal from moving in both the first and second directions; and a locking member movably disposed at one end of the foot pedal, the locking member being switchable between a locked position and an unlocked position, wherein when the locking member is in the locked position, the end of the locking member extending from the foot pedal engages with the first locking groove or the second locking groove, and when the locking member is in the unlocked position, the locking member disengages from the first locking groove or the second locking groove.

[0059] In some embodiments, the locking assembly further includes: an operating member operably disposed on the foot pedal and drivenly connected to the locking member, the operating member being operable to drive the locking member to switch from the locked position to the unlocked position; a linkage member, a first end of the linkage member being drivenly connected to the operating member, a second end of the linkage member being fixedly connected to the locking member, the operating member being operable to drive the locking member to switch from the locked position to the unlocked position via the linkage member; and a first reset member disposed between the operating member and the foot pedal, the first reset member being used for a second reset member disposed between the locking member and the foot pedal, the second reset member being used to bias the locking member to move the locking member toward the locked position.

[0060] In some embodiments, the first locking groove has a first abutting ramp that gradually slopes towards the foot pedal along the first direction. The second locking groove has a first limiting sidewall and a second limiting sidewall at its two ends along the height direction. The second locking groove is located in the first direction of the first locking groove.

[0061] In some embodiments, the foot pedal has a hollow inner cavity, the locking member and the linkage member are movably disposed within the hollow inner cavity, a portion of the operating member extends into the hollow inner cavity and connects to the linkage member, and another portion of the operating member extends out of the hollow inner cavity for operation. The portion of the operating member extending into the hollow inner cavity has a drive groove, the extension direction of which intersects the movement direction of the operating member and the movement direction of the locking member. A first end of the linkage member is inserted into the drive groove and can move along the drive groove. The operating member has a mounting cavity communicating with the hollow inner cavity, and a first reset member is disposed between the top of the hollow inner cavity and the bottom of the mounting cavity and is elastically retractable.

[0062] In some embodiments, the portion of the foot pedal in which the locking member is installed has a first protrusion, the locking member has a second protrusion opposite to the first protrusion, and the second protrusion is located on the side of the first protrusion near the front foot support assembly, and the second reset member is sleeved on the outside of the locking member and its two ends abut against the first protrusion and the second protrusion, respectively.

[0063] In some embodiments, the front foot support assembly includes: a front foot support rod of the vehicle frame; a guide fixed to the side of the front foot support rod facing the foot pedal; and a locking assembly disposed between the guide and the foot pedal.

[0064] In some embodiments, the forefoot support assembly has a guide groove extending along the movement direction of the foot pedal. The foot pedal includes: a pedal body for supporting the user's feet; and a snap-fit ​​member integrally formed with the pedal body. The snap-fit ​​member is at least partially inserted into the guide groove and is slidable along the guide groove.

[0065] In some embodiments, the height adjustment mechanism further includes a snap-fit ​​member disposed between the front foot support assembly and the foot pedal, the snap-fit ​​member being retractably or movably connected to the foot pedal; the front foot support assembly is provided with a guide groove extending along the moving direction of the foot pedal. The snap-fit ​​member includes a snap-fit ​​body and a connecting portion that are interconnected and arranged at an angle, the snap-fit ​​body being at least partially inserted into the guide groove and slidable along the guide groove, one end of the foot pedal being provided with a notch, and the connecting portion being inserted into the notch.

[0066] In some embodiments, the locking assembly includes: a third locking groove disposed on the forefoot support assembly and located in a second direction of the first locking groove; the third locking groove having a second abutting ramp that gradually slopes toward the foot pedal along the first direction; and the third locking groove further having a mounting opening opposite to the second abutting ramp. The locking member can be inserted into the third locking groove through the mounting opening.

[0067] In some embodiments, the height adjustment mechanism further includes a limiting member connected to the guide member and located in the second direction of the third locking groove. When the locking member is inserted into the third locking groove, the foot pedal abuts against the limiting member to restrict the foot pedal from moving in the second direction. Attached Figure Description

[0068] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0069] Figure 1 A perspective view of a vehicle according to the first aspect of the present invention is shown schematically, with the vehicle in an unfolded state;

[0070] Figure 2 Schematic illustration Figure 1 An exploded view of the vehicle shown;

[0071] Figure 3 Schematic illustration Figure 1 A perspective view of the linkage components in the vehicle shown at one angle;

[0072] Figure 4 Schematic illustration Figure 1 A perspective view of the linkage components in the vehicle shown from another angle;

[0073] Figure 5 Schematic illustration Figure 1 A perspective view of the limiting block in the vehicle shown;

[0074] Figure 6 Schematic illustration Figure 1 The vehicle shown is in a three-dimensional view in a state between its deployed and retracted states;

[0075] Figure 7 Schematic illustration Figure 1 The cross-sectional view shown is of the vehicle in a state between its deployed and retracted states; and

[0076] Figure 8 Schematic illustration Figure 1 The image shown is a three-dimensional view of the vehicle in its folded-up state.

[0077] Figure 9 This is a structural schematic diagram of the vehicle provided in the second aspect of the present invention, with the frame in an unfolded state.

[0078] Figure 10 for Figure 9 An exploded view of the vehicle shown.

[0079] Figure 11 for Figure 9 The diagram shows the vehicle from another perspective, along with enlarged views of some seat components and linkage components.

[0080] Figure 12 for Figure 9 The diagram shown is a structural schematic of the vehicle after omitting the front foot support frame, rear foot support frame, and wheel assembly.

[0081] Figure 13 for Figure 12 Exploded view of point A in the vehicle shown;

[0082] Figure 14 for Figure 9 The vehicle shown is in a side sectional view and a partial enlarged view of some seat components, linkage components and backrest components, with the frame in the unfolded state and the connecting straps at the first length.

[0083] Figure 15 for Figure 9 The vehicle shown is in a side sectional view and a partial enlarged view of some seat components, linkage components and backrest components, with the frame in the unfolded state and the connecting straps at the second length.

[0084] Figure 16 for Figure 15 The diagram shows the structure of the vehicle after the pusher frame is reversed, as well as enlarged views of some seat components, linkage components, and backrest components.

[0085] Figure 17a for Figure 9 The vehicle shown is in a side sectional view and a partial enlarged view of some seat components, linkage components and backrest components, with the frame in the retracted state.

[0086] Figure 17b for Figure 17a The vehicle shown is in its folded state, viewed from another angle.

[0087] Figure 18 This is a three-dimensional structural diagram of the carrier in its first use state, which is a first embodiment of the third aspect of this utility model.

[0088] Figure 19 A three-dimensional structural schematic diagram of the carrier according to the first embodiment of the third aspect of this utility model in the second use state;

[0089] Figure 20 This is a three-dimensional structural diagram of the vehicle according to the first embodiment of the third aspect of the present invention after removing the front foot support frame and the rear foot support frame.

[0090] Figure 21 This is a partially exploded view of the vehicle according to the first embodiment of the third aspect of the present invention after removing the front foot support frame and the rear foot support frame.

[0091] Figure 22 for Figure 21 A magnified view of a portion of the image;

[0092] Figure 23 This is a partially exploded view of the vehicle according to the first embodiment of the third aspect of the present invention, after the front and rear foot support frames have been removed.

[0093] Figure 24 for Figure 23 A magnified view of a portion of the image;

[0094] Figure 25 This is a three-dimensional structural schematic diagram of the carrier according to the second embodiment of the third aspect of this utility model;

[0095] Figure 26 This is a side sectional view of the vehicle according to the second embodiment of the third aspect of this utility model;

[0096] Figure 27 for Figure 26 A magnified view of a portion of the image;

[0097] Figure 28 for Figure 27 After removing some internal details, a structural diagram of the cable is displayed.

[0098] Figure 29 This is a side view of the mounting base of the vehicle according to the second embodiment of the third aspect of the present invention, when it is installed in the handrail.

[0099] Figure 30 This is a three-dimensional structural diagram of the mounting base of the carrier and the components installed therein, which is a second embodiment of the third aspect of this utility model.

[0100] Figure 31 An exploded view of the mounting base of the vehicle and the components installed therein, according to the second embodiment of the third aspect of this utility model.

[0101] Figure 32 This is an exploded view from another perspective of the mounting base of the vehicle and the components mounted therein, which is a second embodiment of the third aspect of this utility model.

[0102] Figure 33 This is a three-dimensional structural schematic diagram of the carrier according to the third embodiment of the third aspect of this utility model;

[0103] Figure 34 for Figure 33 A magnified view of a portion of the image.

[0104] Figure 35 A perspective view of a vehicle provided according to a fourth aspect of the present invention is shown schematically, which incorporates a handrail mounting unit provided according to a fourth aspect of the present invention.

[0105] Figure 36 Schematic illustration Figure 35 A perspective view showing the handrail body of the vehicle separated from the frame;

[0106] Figure 37 Schematic illustration Figure 35The shown is a partial CC sectional view of the vehicle, in which the first and second connecting seats of the handrail mounting unit are connected together;

[0107] Figure 38 Schematic illustration Figure 20 The first and second connectors shown are separated from each other;

[0108] Figure 39 An exploded view of the first connecting seat of the handrail mounting unit according to the fourth aspect of the present invention is shown schematically.

[0109] Figure 40 An exploded view schematically shows another first connecting seat of the handrail mounting unit according to the fourth aspect of the present invention;

[0110] Figure 41 An exploded view of the second connecting seat of the handrail mounting unit according to the fourth aspect of the present invention is shown schematically.

[0111] Figure 42 A further exploded view of the second connecting seat of the armrest mounting unit according to the fourth aspect of the present invention is schematically shown; and

[0112] Figure 43 Schematic illustration Figure 35 The DD partial sectional view of the vehicle shown.

[0113] Figure 44 This is a schematic diagram of the structure of the vehicle described in the fifth aspect of this utility model;

[0114] Figure 45 for Figure 44 The diagram shows the structure of the height adjustment mechanism in the vehicle.

[0115] Figure 46 for Figure 45 A sectional view along line AA and a sectional view of the portion circled in dashed lines;

[0116] Figure 47 for Figure 45 A sectional view along line BB and a sectional view of the portion circled in dashed lines;

[0117] Figure 48 for Figure 44 The vehicle shown is a cross-sectional view along the CC line after omitting the foot pedals and locking components;

[0118] Figure 49 This is a schematic diagram of the height adjustment mechanism described in the fifth aspect of this utility model;

[0119] Figure 50 for Figure 49A top view of the foot pedal in the height adjustment mechanism shown;

[0120] Figure 51 for Figure 49 An exploded view of the foot pedal in the height adjustment mechanism shown. Detailed Implementation

[0121] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit the scope of protection of this utility model.

[0122] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0123] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0124] This utility model provides a vehicle that can be a child vehicle, such as a stroller, a high chair, or a tricycle, or a wheelchair or high chair.

[0125] It should be noted that, unless otherwise explicitly specified and limited, the directional terms such as "front," "rear," "left," and "right" in the various embodiments of this utility model are based on the "front," "rear," "left," and "right" orientations when the child vehicle is in the unfolded state and the child is facing forward. Furthermore, arrows P and Q are used to schematically indicate the "front" and "rear" directions, and arrows L and R are used to schematically indicate the "left" and "right" directions in the figures. These directional terms are only used to make the description of the embodiments of this utility model clearer and are not intended to unduly limit the scope of protection of this utility model.

[0126] First aspect

[0127] Figure 1 A perspective view of a vehicle 1000 in its deployed state according to the first aspect of the present invention is shown. Figure 2An exploded view of the vehicle is shown. (As shown) Figure 1 and Figure 2 As shown, this vehicle is illustrated using a child vehicle such as a stroller as an example. It may include components such as a frame 100, a seat assembly 200, and a backrest assembly 400. In this embodiment, the structure of the child vehicle is substantially symmetrical about a longitudinal mid-plane (not shown in the figure; the longitudinal mid-plane can also be referred to as a plane of left-right symmetry). Of course, in some alternative embodiments, such as child vehicles with an asymmetrical braking system, the structure of the child vehicle may not be completely symmetrical.

[0128] Figure 1 and Figure 2 An exemplary embodiment of the frame 100 is shown. The frame 100 includes components such as a seatpost 110, a push handlebar 120, a handrail 130, an auxiliary frame 140, a connecting frame 150, a front leg support frame 160, and a rear leg support frame 170. The frame 100 is foldable, with the folded state corresponding to the folded state of a child vehicle and the unfolded state corresponding to the unfolded state of a child vehicle. Of course, in some alternative embodiments, the frame 100 may have other embodiments and is not limited to those illustrated herein.

[0129] The following is combined Figure 1 and Figure 2 To illustrate the structure of the frame 100 shown in the first aspect of this utility model.

[0130] The frame 100 includes two seatposts 110 located on the left and right sides, each seatpost 110 extending generally forward and backward. The seat assembly 200 includes a movable frame 220 mounted on each seatpost 110, with the movable frame 220 on the same side slidingly engaging with the seatpost 110. The seat assembly 200 also includes a seat frame 230 connected between the two movable frames 220, which is used to directly or indirectly (through the seat cushion) support the child's buttocks.

[0131] The pusher frame 120 is generally U-shaped and includes a first pusher rod 122 and a second pusher rod 123 located on the left and right sides, respectively. The upper ends of the first pusher rod 122 and the second pusher rod 123 are connected by a pusher body 121. In some embodiments, the extension length of the pusher body 121 relative to each pusher rod (first pusher rod 122 and second pusher rod 123) is adjustable. Each pusher rod is pivotally connected to the seat tube 110 on the same side via a pivot shaft 630.

[0132] The handrail frame 130 includes, for example, a first handrail 132 and a second handrail 133 located on the left and right sides, with the front ends of the first handrail 132 and the front ends of the second handrail 133 connected by a handrail body 131. The handrail body 131 is installed on each handrail (first handrail 132 and second handrail 133) in a detachable or non-detachable manner.

[0133] The frame 100 may include, for example, two auxiliary frames 140 and two connecting frames 150 located on the left and right sides. Each auxiliary frame 140 is pivotally connected to the handrail on the same side, specifically via pivot 93. Each connecting frame 150 is pivotally connected to the auxiliary frame 140 on the same side, specifically via pivot shaft 630.

[0134] The front foot support frame 160 of the frame 100 includes, for example, a first front foot support rod 161 and a second front foot support rod 162 located on the left and right sides, with a front crossbar (or footrest) 163 connecting the first front foot support rod 161 and the second front foot support rod 162. The rear foot support frame 170 includes a first rear foot support rod 171 and a second rear foot support rod 172 arranged symmetrically on the left and right sides, with a rear crossbar 173 connecting the first rear foot support rod 171 and the second rear foot support rod 172. A front wheel assembly 181 is respectively installed at the lower end of each front foot support rod (first front foot support rod 161 and second front foot support rod 162). A rear wheel assembly 182 is respectively installed at the lower end of each rear foot support rod (first rear foot support rod 171 and second rear foot support rod 172). The armrest, front foot support rod, and rear foot support rod on the same side are pivotally connected by a pivot 92, and the front foot support rod and seat post 110 on the same side are pivotally connected by a pivot 91. The connecting frame 150 and the rear foot support rod on the same side are pivotally connected via pivot 94. The following is a combination of... Figure 1 and Figure 2 The connection relationships between the right-side components of the child carrier according to the first aspect of this utility model will be described in detail below. Since the structure of the child carrier is basically symmetrical from left to right, the connection relationships of the left-side components can be referenced to the connection relationships of the right-side components described below.

[0135] The front foot support rod and seat tube 110 on the same side are pivotally connected by pivot 91. Specifically, the front end of the right seat tube 110 has a hole 1101, and the middle of the second front foot support rod 162 has a hole 1601. The seat tube 110 and the second front foot support rod 162 are pivotally connected by pivot 91 passing through holes 1101 and 1601. The upper end of the second front foot support rod 162 has a hole 1602, the upper end of the second rear foot support rod 172 has a hole 1702, and the front end of the second handrail 133 has a hole 1301. The second handrail 133, the second front foot support rod 162, and the second rear foot support rod 172 are pivotally connected by pivot 92 passing through holes 1301, 1602, and 1702, respectively. The rear end of the second handrail 133 has a hole 1302, and the upper end of the auxiliary frame 140 has a hole 1402. The second handrail 133 and the auxiliary frame 140 are pivotally connected by pivots 93 passing through holes 1302 and 1402. The rear end of the seat tube 110 has a hole 1102, the lower end of the auxiliary frame 140 has a hole 1401, the upper end of the connecting frame 150 has a hole 1502, and the lower end of the second push rod 123 has a hole 1201. The seat tube 110, auxiliary frame 140, connecting frame 150, and second push rod 123 are pivotally connected by pivot shafts 630 passing through holes 1102, 1401, 1502, and 1201. The lower end of the connecting frame 150 has a hole 1501, and the middle part of the second rear foot support rod 172 has a hole 1701. The connecting frame 150 and the second rear foot support rod 172 are pivotally connected by pivots 94 passing through holes 1501 and 1701.

[0136] See Figure 1 The frame 100 is held in the extended state by the relative rotation between the locking auxiliary frame 140 and the connecting frame 150. Conversely, when it is necessary to fold up the child vehicle, the relative rotation between the locking auxiliary frame 140 and the connecting frame 150 must first be released, and then the push handle 120 can be rotated to fold up the frame 100 as a whole.

[0137] See Figure 1 and Figure 2This embodiment also illustrates an exemplary implementation of a retraction locking mechanism 700 for locking relative rotation between the auxiliary frame 140 and the connecting frame 150. Specifically, a groove 1403 extending along the length of the auxiliary frame 140 is provided on the auxiliary frame 140, and a locking pin 730 is slidably disposed in the groove 1403. The locking pin 730 is adapted to slide along the groove 1403 between holes 1401 and 1402. A locking groove 1503 is formed on the connecting frame 150. When the frame 100 switches from a retracted state to an extended state, the auxiliary frame 140 and the connecting frame 150 rotate relative to each other about the pivot axis 630. When the child vehicle switches to the extended state, the locking groove 1503 aligns with the groove 1403, and the locking pin 730 can be inserted into the locking groove 1503 under the push of an elastic reset member inside the auxiliary frame 140. At this time, the locking pin 730 is simultaneously located in the slide groove 1403 and the locking slot 1503, thereby locking the relative rotation between the auxiliary frame 140 and the connecting frame 150 and keeping the child carrier in the deployed state. In some embodiments, the locking pin 730 includes, for example, a locking portion 731 and a first abutting portion 732. The locking portion 731 is used to slide and engage with the slide groove 1403 and to be inserted into the locking slot 1503. The first abutting portion 732, for example, protrudes laterally relative to the locking portion 731.

[0138] See Figure 1 and Figure 2 This embodiment also illustrates an exemplary implementation of an operating mechanism for relative rotation between the release auxiliary frame 140 and the connecting frame 150. Specifically, a first operating element 710 is mounted on the pusher body 121, which may be, for example, a button. A first slider 740 is provided on each pusher rod (first pusher rod 122 and second pusher rod 123), and each first slider 740 slides in engagement with the corresponding pusher rod (first pusher rod 122 or second pusher rod 123). The first operating element 710 is connected to each first slider 740, for example, via a traction member (not shown in the figure, for example, a rope) inside the pusher frame 120, and each first slider 740 has a laterally protruding second abutment 741. When the frame is in the unfolded state, the second abutment 741 is located below the first abutment 732 on the same side. When the frame 100 needs to be retracted, pressing the first operating member 710 drives the first slider 740 to move upward. The first slider 740 drives the locking pin 730 to exit from the locking groove 1503 through the contact between the second pushing part 741 and the first pushing part 732, thereby releasing the relative rotation between the locking auxiliary frame 140 and the connecting frame 150. In some embodiments, each push rod (first push rod 122 and second push rod 123) may be provided with an elastic reset member. When the pressing of the first operating member 710 is released, the elastic reset member can push the corresponding first slider 740 to reset, and the first operating member 710 also resets accordingly.

[0139] See Figure 1 and Figure 2 This embodiment also illustrates an exemplary implementation for positioning the pusher frame 120. Specifically, each pusher rod (first pusher rod 122 and second pusher rod 123) is provided with a second slider 920, and each second slider 920 is provided with a locking groove 921. Each auxiliary frame 140 is provided with a first locking block 930, and each front foot support rod (first front foot support rod 161 and second front foot support rod 162) is provided with a second locking block 940. When the pusher frame 120 rotates back and forth about the pivot shaft 630, the first locking block 930 of the auxiliary frame 140 and the second locking block 940 of the front foot support rod selectively engage in the locking groove 921, so that the pusher frame 120 is positioned in a first backward tilted position ( Figure 1 In the indicated state, the first engaging block 930 of the auxiliary frame 140 is engaged in the engaging slot 921, or it is positioned in a forward-leaning second position (not shown in the figure, the second engaging block 940 of the front foot support rod is engaged in the engaging slot 921). Switching between the backward-leaning first position and the forward-leaning second position of the pusher frame 120 corresponds to a reversal of the pusher frame 120's direction. When the pusher frame 120 is in the first position, the child riding in the child vehicle faces forward in the direction of travel and has their back to the caregiver pushing the pusher frame 120. When the pusher frame 120 is in the second position, the child riding in the child vehicle faces backward in the direction of travel and faces the caregiver pushing the pusher frame 120.

[0140] Each second slider 920 slides in engagement with its corresponding push rod 122, 123. A second operating member 910 is also provided inside the two push rods 122, 123. The second operating member 910 is connected to the second slider 920, for example, via a second traction member (not shown in the figure, e.g., a rope) inside the push rods 122, 123. When the second operating member 910 is operated, it can drive the second slider 920 to slide upwards along the push rods 122, 123 via the second traction member. At this time, the engaging groove 921 of the second slider 920 can disengage from the first engaging block 930 or the second engaging block 940. Then, by rotating the push rod 120, the engaging groove 921 of the second slider 920 is aligned and engaged with the second engaging block 940 or the first engaging block 930, thus completing the forward and backward reversal of the push rod 120. Each push rod 122, 123 may also have an elastic reset member inside for pushing the corresponding second slider 920 back to its original position.

[0141] In another embodiment (not shown), the traction member connecting the first operating member 710 and the first slider 740 is simultaneously connected to the second slider 920, for example. When the reversing pusher 120 needs to be reversed, pressing the first operating member 710 causes the traction member to pull the second slider 920 upward, easily disengaging the engagement groove 921 of the second slider 920 from one of the first engagement block 930 and the second engagement block 940. Then, the pusher 120 is rotated so that the engagement groove 921 of the second slider 920 aligns and engages with the other of the first engagement block 930 and the second engagement block 940. Each pusher lever may be provided with an elastic reset member for pushing the corresponding second slider 920 back to its original position.

[0142] In embodiments where the first operating member 710 is simultaneously connected to the first slider 740 and the second slider 920, when the first operating member 710 is pressed, the first slider 740 also moves upward, driving the locking pin 730 to release. To prevent the locking pin 730 from accidentally releasing when the pusher frame 120 reverses direction, in some embodiments, the stroke by which the first slider 740 drives the locking pin 730 to release is greater than the stroke by which the engagement groove 921 of the second slider 920 disengages from the engagement of the engagement blocks 930 and 940. In some embodiments, a first indicator and a second indicator can also be configured on the pusher frame 120 for the first operating member 710. When the first operating member 710 moves to the first indicator, the engagement groove 921 corresponding to the second slider 920 disengages from the engagement of the first engagement block 930 or the second engagement block 940. At this time, the pusher frame 120 can be pushed to reverse direction, and the locking pin 730 still maintains the relative rotation between the locking auxiliary frame 140 and the connecting frame 150. When the first operating element 710 moves to the second indication, the relative rotation between the locking pin 730 and the locking auxiliary frame 140 and the connecting frame 150 is driven by the first slider 740, which allows the frame 100 to be retracted.

[0143] See Figure 1 and Figure 2 In some embodiments, each engaging block 930, 940 may have downwardly extending baffles 931, 941. Each push rod may also be fixedly provided with a fastener 980, located below the corresponding second slider 920, and facing the engaging groove 921. When the push rod frame 120 is in the first position, each fastener 980 abuts against the first baffle 931 of the first engaging block 930 on the corresponding auxiliary frame 140. When the push rod frame 120 is in the second position, each fastener 980 abuts against the second baffle 941 of the second engaging block 940 on the corresponding front foot support rod. The configuration of the baffles 931, 941 and the fasteners 980 can limit the reversing rotation range of the push rod frame 120.

[0144] See you again Figure 1 and Figure 2In some embodiments, the frame 100 further includes a drive assembly 600, through which rotation of the pusher arm 120 drives the movable frame 220 to move along the seat tube 110. See also, in some embodiments, [see...]. Figure 1 With the frame 100 in the unfolded state, when the push handle 120 rotates around the pivot 630 along the first direction S1 (S1 in the diagram is clockwise) to switch from the first position to the second position, the movable frame 220 slides forward relative to the seat post 110. Conversely, when the push handle 120 rotates around the pivot 630 along the second direction S2 (S2 in the diagram is counterclockwise) to switch from the second position to the first position, the movable frame 220 slides backward relative to the seat post 110. Since the seat frame 230 is used to support the child's buttocks, the forward and backward movement of the movable frame 220 is equivalent to the center of gravity of the child vehicle shifting forward and backward according to the direction of the push handle 120, so that the center of gravity of the child vehicle is always close to the caregiver pushing the push handle 120, which helps the caregiver to push the child vehicle with less effort.

[0145] See Figures 2 to 4 This embodiment also illustrates an exemplary implementation of the drive assembly 600, but the implementation of the drive assembly 600 is not limited to the examples given herein. The drive assembly 600 includes a linkage mechanism 640 and the aforementioned pivot shaft 630. The pivot shaft 630 rotates synchronously with the pusher frame 120, and the linkage mechanism 640 is connected between the pivot shaft 630 and the movable frame 220 to convert the rotation of the pivot shaft 630 into movement of the movable frame 220 along the seat tube 110.

[0146] Figure 3 and Figure 4 An exemplary embodiment of the linkage mechanism 640 is also shown. Of course, in some alternative embodiments, the implementation of the linkage mechanism 640 is not limited to the examples given herein. The linkage mechanism 640 includes, for example, a first drive rod 610 and a second drive rod 620. A first end of the first drive rod 610 is provided with a hole 601, and the first drive rod 610 is fitted onto a pivot shaft 630 through the hole 601 and rotates synchronously with the pivot shaft 630. The second end of the first drive rod 610 and the first end of the second drive rod 620 are connected by a pivot 660. The second end of the second drive rod 620 is provided with a hole 603, and the hole 603 is connected to a hole 302 on the movable frame 220 through a second rotating shaft N. Figure 2 Pivot connection. When the pusher frame 120 rotates in a different direction, the pusher frame 120 drives the pivot shaft 630 to rotate synchronously, the pivot shaft 630 drives the first drive rod 610 to rotate synchronously, and the second drive rod 620 drives the movable frame 220 to move back and forth along the seat tube 110.

[0147] Figure 3 and Figure 4An exemplary embodiment of the pivot shaft 630 is also shown. Of course, in some alternative embodiments, the implementation of the pivot shaft 630 is not limited to the examples given herein. The pivot shaft 630 includes, for example, a first shaft segment 631, a second shaft segment 632, and a third shaft segment 633 connected sequentially. The first shaft segment 631 is used to fit into a hole 1102 of the seat tube 110 for pivotal connection with the seat tube 110. The diameter of the second shaft segment 632 is larger than that of the first shaft segment 631, and at least a portion of the length of the second shaft segment 632 is provided with a cross section 6321. The hole 601 of the first connecting rod 610 has a cross section 6011, and the fit between the cross section 6321 and the cross section 6011 ensures synchronous rotation of the first connecting rod 610 and the pivot shaft 630. At least a portion of the length of the third shaft segment 633 is provided with a cross section 6331, and the holes 1201 of each push rod (first push rod 122 and second push rod 123) have a cross section 1205 (see...). Figure 2 The fit between the cut surfaces 6331 and 1205 ensures the synchronous rotation of the pusher frame 120 and the pivot shaft 630. Of course, there are many other ways to achieve synchronous linkage between the pusher frame 120, the pivot shaft 630 and the first drive rod 610, and it is not limited to the cut surface fit described above.

[0148] The portion of the pivot shaft 630 located between sections 6321 and 6331 is used for pivoting with holes 1401 in the auxiliary frame 140 and 1502 in the connecting frame 150. In some embodiments, the pivot shaft 630 may include a shoulder 634 having a larger diameter and located between sections 6321 and 6331. A bushing (not shown) may be fitted onto the shoulder 634, for example, through which holes 1401 and 1502 can be pivotally connected to the pivot shaft 630. The connecting frame 150 is located, for example, between the auxiliary frame 140 and the push rod on the same side in the axial direction of the pivot shaft 630.

[0149] See Figures 1 to 3 In some embodiments, the pivot 630 has a center hole 635 for a fastener 650 to pass through. The fastener 650 may be, for example, a bolt or a rivet, which can easily secure the irregularly shaped pivot 630 to the various components mounted on the pivot 630.

[0150] See you again Figure 1 and Figure 2This embodiment also illustrates an exemplary implementation of the backrest assembly 400. Of course, in some alternative embodiments, the backrest assembly 400 may have other implementations. In this embodiment, the backrest assembly 400 includes, for example, a backrest frame 410, a backrest tube 450, an adjustment mechanism 440, and an adjustment strap 430. The backrest frame 410 and the backrest tube 450 are pivotally connected to a first rotating shaft M, which is, for example, disposed on a movable frame 220. The backrest frame 410 and the backrest tube 450 can rotate about the first rotating shaft M, respectively. The adjustment mechanism 440 and the adjustment strap 430 are connected to the backrest frame 410.

[0151] The backrest frame 410 is, for example, U-shaped, and includes a first backrest rod 412 and a second backrest rod 413 located on the left and right sides, and a backrest body 411 connected to the upper ends of the two backrest rods (the first backrest rod 412 and the second backrest rod 413). The two backrest rods are respectively pivotally connected to holes 301 on the movable frame 220 on the same side via a first pivot M. In this way, when the frame 100 is in the unfolded state and the movable frame 220 moves back and forth relative to the seat tube 110, the backrest frame 410 moves synchronously with the movable frame 220 and maintains a constant front-to-back relationship with the movable frame 220.

[0152] The backrest tube 450 is, for example, U-shaped, with its two vertical tubes pivotally connected to the backrest frame 410 via a first pivot M. A seat fabric (not shown) wraps around the backrest frame 410 and the backrest tube 450, forming a backrest portion within the area defined by the backrest tube 450, providing back support for the child. In some alternative embodiments, a rigid backrest board (not shown) may be provided in the backrest portion. Adjustment straps 430 are connected to the respective backrest rods (first backrest rod 412 and second backrest rod 413), and after passing around the backrest tube 450, are connected to an adjustment mechanism 440 located behind the backrest board. The tilt angle of the backrest tube 450 and the backrest board can be adjusted by increasing or decreasing the length of the adjustment straps 430 located between the respective backrest rods and the adjustment mechanism 440. Implementations of the adjustment mechanism 440 can be found in related art and will not be described further here. Of course, in some alternative embodiments, the backrest assembly 400 may not have a backrest tube 450. The backrest plate may be connected to the backrest frame 410 only by a seat cloth. The tilt angle of the backrest plate can still be adjusted by the adjustment mechanism 440 and the adjustment strap 430.

[0153] In some embodiments, the child vehicle may further include a connector (not shown) for defining the range of rotation of the backrest 410 to prevent the backrest 410 from rotating excessively about the first axis of rotation M in the second direction S2 or excessively in the first direction S1. In some embodiments, the connector may include, for example, a flexible band connecting the armrest (first armrest 132 or second armrest 133) and the backrest (first backrest 412 or second backrest 413) on the same side; however, the implementation of the connector is not limited to this.

[0154] During the retraction of the frame, the backrest 410 is prone to swaying towards the movable frame 220 due to the thrust. See also Figure 1 , Figure 2 and Figure 5 The child vehicle may also include a limiting block 1600, an exemplary embodiment of which is shown in this example. Of course, in some alternative embodiments, the limiting block 1600 may have other implementations. The limiting block 1600 may be mounted at any suitable location on the frame 100 to limit the rotation of the backrest 410 as needed.

[0155] In this embodiment, the limiting block 1600 includes, for example, a limiting body portion 1610, which has, for example, a mounting groove 1611. The limiting block 1600 is fixed to the rear end of the seat tube 110 through this mounting groove 1611. Figure 2 and Figure 5 As can be seen, the seat tube 110 is a flat tube, and the mounting groove 1611 is correspondingly a flat groove, so the limiting block 1600 and the seat tube 110, which are fitted together, will not rotate circumferentially. Furthermore, the limiting body portion 1610 of the limiting block 1600 may be provided with a hole 1612 through which the pivot shaft 630 passes. The pivot shaft 630 is used to restrict the relative movement between the limiting block 1600 and the seat tube 110, fixing the limiting block 1600 to the seat tube 110. Of course, the structure of the limiting block 1600 and the seat tube 110 is not limited to the example in this embodiment, and correspondingly, the methods for restricting the circumferential rotation and axial movement of the limiting block 1600 and the seat tube 110 are not limited to the example in this embodiment. For example, in some alternative embodiments, the mounting groove 1611 of the limiting block 1600 is connected to the seat tube 110 by a cross section, and the hole 1612 of the limiting block 1600 can be connected to the seat tube 110 by a pin parallel to the pivot shaft 630.

[0156] See you again Figure 1Each backrest bar (first backrest bar 412 and second backrest bar 413) has a movable end 414, which is located, for example, at the bottom of the corresponding backrest bar and below the first pivot M. When the frame 100 is in the unfolded state and the pusher frame 120 is in the first tilted position, the movable end 414 is clamped, for example, between the limiting block 1600 and the movable frame 220, thereby positioning the backrest frame 410. More specifically, the limiting block 1600 may have a first end face 1613, and the movable frame 220 may have a locking portion 226. The first end face 1613 is opposite to the locking portion 226 and is adapted to clamp the movable end 414 from both sides, thereby positioning the backrest frame 410. The first end face 1613 and the locking portion 226 may have surface shapes that mate with the movable end 414. In some embodiments, the movable end 414 extends obliquely at the bottom of the backrest bar, and the first end face 1613 and the latching portion 226 extend obliquely accordingly. In some embodiments, when the frame 100 is in the unfolded state and the pusher arm 120 is in the forward-tilted second position, the movable frame 220 is pushed to the front of the seat tube 110, and the movable end 414 remains in contact with the latching portion 226 of the movable frame 220 while disengaging from the first end face 1613 of the limiting block 1600. At this time, the latching portion 226 on the movable frame 220 restricts the rotation of the backrest 410 in the second direction S2, while the backrest 410 is held by the connector (not shown in the figure) described above, which restricts the rotation of the backrest 410 in the first direction S1, thereby positioning the backrest 410 with the cooperation of the latching portion 226 and the connector.

[0157] Figure 6 A perspective view shows the child vehicle in a state between its unfolded and folded positions. Figure 7 A cross-sectional view is shown of the child vehicle in another state between its deployed and folded positions. Figure 8 A 3D view of the child vehicle in its folded state is shown. Below, in conjunction with... Figure 1 , Figure 2 , Figures 6 to 8 To illustrate the folding process of this child vehicle.

[0158] See Figure 1 and Figure 2 When the child carrier needs to be folded, pressing the operating element 710 releases the lock between the auxiliary frame 140 and the connecting frame 150. Then, pushing the pusher frame 120 causes the auxiliary frame 140 to rotate about the pivot axis 630 in the first direction S1, and the connecting frame 150 to rotate about the pivot axis 94 in the second direction S2. The rotation of the connecting frame 150 causes the seat tube 110 to rotate about the pivot axis 91 in the second direction S2, and each armrest rotates about the pivot axis 92 in the second direction S2, thereby causing the front foot support frame 160 and the rear foot support frame 170 to move closer to each other, ultimately folding the carrier into place. Figure 8 The closed state is shown.

[0159] See Figure 6 and Figure 7 During the folding and unfolding of the child vehicle, the movable frame 220 moves along the seat tube 110 away from the limiting block 1600 as the pusher frame 120 rotates, and the locking part 226 separates from the movable end 414, making room for the rotation of the backrest frame 410. While the pusher frame 120 rotates in the first direction S1, it pushes the backrest frame 410 to rotate around the first axis M in the first direction S1, causing the backrest frame 410 to move closer to the movable frame 220.

[0160] When the frame 100 switches from the extended state to the retracted state, the backrest 410 is continuously subjected to the thrust from the pusher frame 120, which makes it prone to uncontrolled swaying in the first direction S1, preventing the backrest 410 from retracting stably with the pusher frame 120. Therefore, in this embodiment, the limiting block 1600 is provided with a telescopic part 1620. When the frame 100 switches from the extended state to the retracted state, the telescopic part 1620 is adapted to abut against the movable end 414 of the backrest rod on the same side, and applies a rotational force to the backrest 410 in the second direction S2. This counteracts the rotational thrust on the backrest 410 in the first direction S1, allowing the backrest 410 to retract stably with the pusher frame 120, thus alleviating the swaying phenomenon of the backrest 410 during the retraction process of the frame 100.

[0161] See Figures 5 to 7 In some embodiments, the telescopic portion 1620 is disposed below the first end face 1613. When the backrest 410 rotates about the first axis of rotation M in the first direction S1, when the movable end 414 rotates into the telescopic path of the telescopic portion 1620, the telescopic portion 1620 abuts against the movable end 414 and applies force to the backrest 410. In some alternative embodiments, the telescopic path of the telescopic portion 1620 may pass through at least a portion of the first end face 1613.

[0162] Figure 5 , Figure 7 and Figure 8An exemplary embodiment of the telescopic portion 1620 is shown; however, the embodiments of the telescopic portion 1620 are not limited to the examples in this embodiment. The telescopic portion 1620 may include a slider 1621 and a resilient return member 1622. The slider 1621 is slidably engaged with the limiting body portion 1610 for abutting against the movable end 414. In some embodiments, the slider 1621 may be made of a high-strength and wear-resistant material, for example. The resilient return member 1622 is clamped between the limiting body portion 1610 and the slider 1621 to allow the slider 1621 to resiliently extend and retract when abutting against the movable end 414. The resilient return member 1622 may be, for example, a spring. In some alternative embodiments, the telescopic portion 1620 may have a resiliently rebounding structure or be made directly of a resiliently deformable material. The telescopic portion 1620 is mounted on the limiting body portion 1610 and is resiliently deformable to apply a rotational force in the second direction S2 to the backrest 410 by abutting against the movable end 414.

[0163] See Figure 5 In some embodiments, the limiting body 1610 may be provided with a guide groove 1614. The guide groove 1614, for example, has a slot 1615 facing the movable end 414 and a slot bottom opposite to the slot 1615. The slot bottom may be a closed structure. The telescopic part 1620 can be installed in the guide groove 1614 through the slot 1615 and can elastically extend and retract relative to the slot 1615. More specifically, the slider 1621 slides in engagement with the guide groove 1614, and the elastic reset member 1622 is clamped between the slot bottom of the guide groove 1614 and the slider 1621. Under the action of the elastic reset member 1622, the slider 1621 can elastically extend and retract relative to the slot 1614. The slider 1621 located outside the slot 1614 is used to abut against the movable end 414. Of course, in some alternative embodiments, the telescopic part 1620 may also be connected to the limiting body part 1610 by other suitable structures. That is, the telescopic part 1620 is not limited to being installed on the limiting body part 1610 through the guide groove 1614.

[0164] See Figure 5 In some embodiments, a limiting mechanism 1630 may be provided between the slider 1621 and the body portion 1610. The limiting mechanism 1630 is used to limit the sliding stroke of the slider 1621 to prevent the telescopic portion 1620 from accidentally disengaging from the guide groove 1614. The limiting mechanism 1630 may include, for example, a limiting hole 1631 provided on the groove wall of the guide groove 1614 and a limiting protrusion 1632 provided on the slider 1621. The limiting protrusion 1632 and the limiting hole 1631 are slidably engaged. In some embodiments, the limiting hole 1631 may be, for example, an elongated hole, and the limiting protrusion 1632 may be, for example, a pin mounted on the slider 1621. In some alternative embodiments, the positions of the limiting hole 1631 and the limiting protrusion 1632 on the wall of the guide groove 1614 and on the slider 1621 may be interchanged.

[0165] See Figure 5 In some embodiments, the bottom of the opening 1615 of the guide groove 1614 has an outwardly protruding extension support 1616. This extension support 1616 provides additional support for the slider 1621 that extends and retracts relative to the opening 1614. In some embodiments, a limiting protrusion 1617 may be provided at the upper part of the opening 1614, opposite to the extension support 1616, and the limiting protrusion 1617 may restrict excessive pivoting of the movable end 414 about the first axis of rotation M in the first direction S1. In some embodiments, the limiting protrusion 1617 may be provided, for example, above the opening 1615 of the guide groove 1614, for example, at the intersection of the end face 1618 and the first end face 1613 of the opening 1615.

[0166] Second aspect

[0167] To facilitate storage and transportation, most strollers on the market nowadays have a folding function, such as the seat folding in conjunction with the frame. The backrest and back panel on the seat of such strollers are generally adjusted by adjusting the length of the straps to change the angle of the backrest. However, because the backrest needs to be fixed in place and folded, and the frame needs to be linked to the backrest on the seat to fold and unfold synchronously, the mechanism is complex to operate and inconvenient to use.

[0168] like Figure 9 As shown, the second aspect of this utility model proposes a carrier, which can be a children's stroller. The stroller's frame 100 and backrest assembly 400 have a simple and convenient folding structure.

[0169] Specifically, such as Figure 9 and Figure 10 As shown, the trolley includes a frame 100, a seat assembly 200, a backrest assembly 400, a drive assembly 600, a folding and locking mechanism 700, and a linkage assembly 1500. The frame 100 is switchable between a folded state and an unfolded state. The seat assembly 200 is movably mounted on the frame 100. The linkage assembly 1500 is movably connected to both the frame 100 and the seat assembly 200. The backrest assembly 400 is movably connected to the seat assembly 200 via the linkage assembly 1500. When the frame 100 switches from the unfolded state to the folded state, the linkage assembly 1500 can drive the backrest assembly 400 to fold towards the seat assembly 200. The drive assembly 600 is disposed between the push handle 120 and the movable frame 220 of the seat assembly 200 (described later), and the frame 100 can be operated to drive the movable frame 220 along the seat tube 110 of the frame 100 (described later) via the drive assembly 600.

[0170] Specifically, such as Figure 9 and Figure 10 As shown, the frame 100 includes a seatpost 110, a pusher frame 120, a handrail frame 130, an auxiliary frame 140, a connecting frame 150, a front foot support frame 160, and a rear foot support frame 170. The handrail frame 130 includes a handrail body 131 and handrail bars 132 and 133. Both the front foot support frame 160 and the rear foot support frame 170 are generally H-shaped frame structures. The two upper ends of the front foot support frame 160 are pivotally connected to the two upper ends of the rear foot support frame 170, while the two lower ends of the front foot support frame 160 and the two lower ends of the rear foot support frame 170 are spaced apart to form a stable triangular support structure. Two sets of wheel assemblies 181 and 182 are provided at the two lower ends of both the front foot support frame 160 and the rear foot support frame. The handrail body 131 is generally a U-shaped rod structure, with both ends detachably or non-detachably connected to two pivot points on the front support frame 160 and the rear support frame 170. There are two handrails, namely the first handrail 132 and the second handrail 133, both arranged roughly along the front-rear direction of the trolley. The front ends of both handrails 132 and 133 are pivotally connected to the pivot points on the front support frame 160 and the rear support frame 170. Two auxiliary frames 140 are correspondingly provided, with their upper ends pivotally connected to the rear ends of the two handrails 132 and 133, respectively. Two connecting frames 150 are correspondingly provided, both generally L-shaped. One end of each connecting frame 150 is pivotally connected to the lower end of each auxiliary frame 140, and the other end of each connecting frame 150 is pivotally connected to the left and right sides of the rear support frame 170, respectively. Specifically, the pusher frame 120 includes a pusher body 121 with a generally U-shaped frame structure and two pusher rods 122 and 123 connected to both ends of the pusher body 121. The ends of the two pusher rods 132 and 133 are pivotally connected to the seat tube 110.

[0171] Specifically, such as Figure 9 and Figure 10 As shown, two seat tubes 110 are respectively located on the left and right sides of the trolley. The seat assembly 200 includes movable frames 220 that are slidably mounted on the two seat tubes 110 and seat frames 230 that are fixed to the two movable frames 220. The structure is described in detail below using one side of the seat tube 110 and movable frame 220 as an example:

[0172] like Figures 11 to 13 As shown, the seat tube 110 extends approximately along the front-to-back direction of the trolley, and its front and rear ends are pivotally connected to the front foot support frame 160 and the rear foot support frame 170, respectively. The movable frame 220 includes a sliding sleeve 221, a connecting part 222, a first mounting part 223, and a second mounting part 224.

[0173] A sliding sleeve 221 is fitted over the seat tube 110 and can move along the seat tube 110. A connecting part 222 is connected to the lower side of the sliding sleeve 221. The connecting part 222 has a groove 2221, and a guide groove 2222 penetrating the groove 2221 is provided on one side wall or two opposite side walls of the groove 2221. The connecting part 222 is generally L-shaped frame structure, including a first connecting section 2223 and a second connecting section 2224 that are connected to each other. The first connecting section 2223 extends in a direction parallel to the seat tube 110 and is connected to the sliding sleeve 221 on one side. One end of the second connecting section 2224 is connected to one end of the first connecting section 2223, and the extension direction of the second connecting section 2224 intersects the extension direction of the first connecting section 2223. The second connecting section 2224 is set at an angle to the sliding sleeve 221, and a groove 225 is formed between the second connecting section 2224 and the sliding sleeve 221 (e.g., Figure 13 (As shown). The groove wall of the groove 225 forms a snap-fit ​​portion 226. The guide groove 2222 includes a first groove portion 2222a and a second groove portion 2222b that are interconnected. The first groove portion 2222a extends along the moving direction of the movable frame 220, and the extending direction of the second groove portion 2222b intersects the extending direction of the first groove portion 2222a. The end of the first groove portion 2222a away from the second groove portion 2222b is the first end 2222c, and the end of the second groove portion 2222b away from the first groove portion 2222a is the second end 2222d. In this embodiment, the guide groove 2222 is provided approximately along the extending direction of the connecting portion 222. In other embodiments, the connecting portion 222 may also have other shapes, and the guide groove 2222 need not be provided along the extending direction of the connecting portion 222. The first mounting part 223 is connected to the inner side of the sliding sleeve 221, that is, the side of the sliding sleeve 221 opposite to the other side of the seat tube 110. One side of the seat frame 230 is mounted on the first mounting part 223. The second mounting part 224 is located on the upper rear side of the sliding sleeve 221. In this embodiment, the movable frame 220 is a one-piece molded structure.

[0174] Specifically, such as Figure 12 and Figure 13As shown, the drive assembly 600 includes a first drive rod 610 and a second drive rod 620 pivotally connected to each other. The end of the first drive rod 610 away from the second drive rod 620 is connected to the push handle frame 120, and the end of the second drive rod 620 away from the first drive rod 610 is connected to the movable frame 220. In this embodiment, the end of the second drive rod 620 away from the first drive rod 610 is connected to the second mounting portion 224 of the movable frame 220. Thus, during the folding or unfolding of the frame 100, the rotation of the push handle frame 120 can drive the movable frame 220 to slide along the seat tube 110. In this embodiment, the drive assembly 600 also includes a pivot shaft 630. One end of the pivot shaft 630 is fixed to the ends of the push handle rods 122 and 123, and the other end of the pivot shaft 630 passes sequentially through the connecting frame 150, the auxiliary frame 140, and the end of the first drive rod 610 away from the second drive rod 620, and is pivotally connected to the rear end of the seat tube 110. The end of the first drive rod 610 furthest from the second drive rod 620 is fixed to the pivot shaft 630. Thus, when the push rods 122 and 123 rotate, they can drive the first drive rod 610 and the second drive rod 620 to pivot via the pivot shaft 630, thereby pushing the movable frame 220 to slide along the seat tube 110 via the second drive rod 620.

[0175] Furthermore, such as Figure 12 and Figure 13 As shown, the trolley may also include a retraction and locking mechanism 700. Specifically, the retraction and locking mechanism 700 may include a first operating member 710, a first traction member (not shown in the figures), a locking pin 730, and a first slider 740. In this embodiment, there is one first operating member 710, operably located approximately in the center of the pusher body 121, but this is not a limitation. There are two first traction members, two locking pins 730, and two first sliders 740, respectively located on the left and right sides of the trolley. The following description uses one side of the retraction and locking mechanism 700 as an example:

[0176] like Figure 12 and Figure 13As shown, the first slider 740 is slidably disposed on the push handles 122 and 123. One end of the first traction member is connected to the first operating member 710, and the other end is connected to the first slider 740. When the first operating member 710 is operated, it can drive the first slider 740 to slide upward along the push handles 122 and 123 via the first traction member. A first locking groove 1503a is formed at the connection between the auxiliary frame 140 and the connecting frame 150. A sliding groove 1403 is provided on the side of the auxiliary frame 140 facing the push handles 122 and 123, i.e., on the outer side of the auxiliary frame 140, and a locking pin 730 is slidably disposed in the sliding groove 1403. When the trolley is switched to the unfolded state, the locking pin 730 can switch between the unfolded locking position and the unfolded unlocking position. Specifically, when the trolley is switched to the unfolded state, the first locking groove 1503a aligns with the slide groove 1403, and the locking pin 730 can be inserted into the first locking groove 1503a (i.e., in the unfolded locked position) to lock the frame 100 in the unfolded state. The locking pin 730 can disengage from the first locking groove 1503a (i.e., in the unfolded unlocked position) to release the lock on the frame 100 in the unfolded state, and the frame 100 can be folded. The locking pin 730 includes a locking part 731 and a first pushing part 732 connected to each other. The locking part 731 is slidably disposed in the slide groove 1403 and can be inserted into the first locking groove 1503a. One end of the first pushing part 732 is fixed to the locking part 731, and the other end protrudes toward the push handles 122 and 123. The first slider 740 is provided with a second pushing part 741 protruding toward the auxiliary frame 140. The second pushing part 741 abuts against the lower side of the first pushing part 732. Thus, when the first operating member 710 is operated, the first operating member 710 can pull the first slider 740 upward through the first traction member. At the same time, the first slider 740 drives the locking pin 730 upward to the unfolded 97 unlocked position through the abutment between the first pushing part 732 and the second pushing part 741. The locking part 731 of the locking pin 730 disengages from the first locking groove 1503a, thereby releasing the lock on the frame 100 in the unfolded state.

[0177] like Figure 13 , Figure 17a and Figure 17bAs shown, a second locking groove 1503b can also be formed at the connection between the auxiliary frame 140 and the connecting frame 150. When the trolley is switched to the folded state, the locking pin 730 can switch between the folded locked position and the folded unlocked position. Specifically, when the trolley is switched to the folded state, the second locking groove 1503b is aligned with the slide groove 1403, and the locking pin 730 can be inserted into the second locking groove 1503b (i.e., in the folded locked position) to lock the frame 100 in the folded state. The locking pin 730 can disengage from the second locking groove 1503b (i.e., in the folded unlocked position) to release the lock on the frame 100 in the folded state, and the frame 100 can be unfolded. When the first operating member 710 is operated, the first operating member 710 can pull the first slider 740 upward through the first traction member. At the same time, the first slider 740 drives the locking pin 730 upward to the retracted and unlocked position through the abutment between the first abutment part 732 and the second abutment part 741. The locking part 731 of the locking pin 730 disengages from the second locking groove 1503b, thereby releasing the lock on the frame 100 in the retracted state.

[0178] The first locking groove 1503a and the second locking groove 1503b can be disposed on opposite sides of the pivot shaft 630 that pivotally connects the connecting frame 150 and the auxiliary frame 140. When the frame 100 is in the unfolded state, the first locking groove 1503a is aligned with the slide groove 1403. When the frame 100 switches from the unfolded state to the retracted state, the connecting frame 150 rotates relative to the auxiliary frame 140 around the pivot shaft 630, and when the frame 100 switches to the retracted state, the second locking groove 1503b is aligned with the slide groove 1403.

[0179] Furthermore, the trolley may also include a reversing locking mechanism 900. Specifically, the reversing locking mechanism 900 may include a second operating member 910, a second traction member (not shown in the figures), and a second slider 920. For example... Figure 10 As shown, there are two second operating components 910, each operably located on the inner side of one of the two push levers 122 and 123. Please refer to [the diagram / reference]. Figure 12 and Figure 13 There are also two second traction components and two second sliders 920, located on the left and right sides of the trolley, respectively. The following explanation uses the reversing locking mechanism 900 on one side as an example:

[0180] like Figure 12 and Figure 13 As shown, the second slider 920 is slidably disposed on the push handles 122 and 123, and the second slider 920 is located above the first slider 740, that is, the second slider 920 is located on the side of the first slider 740 closer to the push handle body 121. One end of the second traction member is connected to the second operating member 910, and the other end is connected to the second slider 920. The upper end of the auxiliary frame 140 is also provided with a first locking block 930, please refer to [reference needed]. Figure 9The upper end of the front foot support frame 160 is provided with a second engaging block 940, and the second slider 920 is provided with an engaging groove 921 that can engage with the first engaging block 930 or the second engaging block 940. Figure 10 Please see also. Figure 10 As mentioned above, when the second operating member 910 is operated, it can drive the second slider 920 to slide upward along the push handles 122 and 123 via the second traction member. At this time, the engaging groove 921 of the second slider 920 can disengage from the first engaging block 930 and rotate around the pivot shaft 630 until the engaging groove 921 of the second slider 920 engages with the second engaging block 940. This allows the trolley to reverse direction; before reversing, the front foot support 160 is in front of the rear foot support 170, and after reversing, the front foot support 160 is behind the rear foot support 170. It should be noted that "front" and "rear" here refer to the direction of travel of the trolley. Specifically, the direction of travel when the front foot support 160 is in front of the rear foot support 170 can be denoted as the first direction of travel F1. Figure 15 As shown; the direction of travel when the front leg support 160 of the trolley is behind the rear leg support 170 is denoted as the second direction of travel F2, as follows. Figure 16 As shown.

[0181] Specifically, such as Figure 13 and Figure 14 As shown, the trolley has linkage assemblies 1500 on both the left and right sides. The following explanation uses one of these linkage assemblies 1500 as an example to illustrate its specific structure:

[0182] The linkage assembly 1500 includes a first linkage 1510 and a second linkage 1520. The first linkage 1510 is generally elongated and has a first movable portion 1511 and a first pivot portion 1512. In this embodiment, the first movable portion 1511 and the first pivot portion 1512 are located at opposite ends of the first linkage 1510. The first movable portion 1511 is pivotally connected to the seat assembly 200, and the first pivot portion 1512 is pivotally connected to the vehicle frame 100. In this embodiment, the first movable portion 1511 has a first movable protrusion 15111. One end of the first linkage 1510 with the first movable portion 1511 is inserted into the connecting portion 222 through a slot 2221, and the first movable protrusion 15111 is inserted into the guide groove 2222 of the connecting portion 222 and can slide along the guide groove 2222, so that the first movable portion 1511 can slide relative to the connecting portion 222. Thus, the first connecting rod 1510 is movably sleeved within the slot 2221 and guided and positioned by the first movable protrusion 15111 and the guide groove 2222, increasing the stability of the first connecting rod 1510's movement. When the trolley is in the unfolded state, the first movable protrusion 15111 is located at the first end 2222c of the guide groove 2222. When the trolley is in the folded state, the first movable protrusion 15111 is located at the second end 2222d of the guide groove 2222. The first pivot portion 1512 is pivotally connected to the lower end of the auxiliary frame 140 via the pivot shaft 97. In this embodiment, the seat tube 110 mentioned above is pivotally connected to the auxiliary frame 140 via the pivot shaft 630, and the pivot shaft 630 is away from the lower end of the auxiliary frame 140 relative to the pivot shaft 97, that is, the pivot shaft 630 is located above the pivot shaft 97. The first link 1510 also has a drive groove 1513, which is located between the first movable part 1511 and the first pivot part 1512 and extends along the length direction of the first link 1510.

[0183] Furthermore, such as Figure 13 and Figure 14As shown, the second connecting rod 1520 includes a first rod portion 1521 and a second rod portion 1522 connected to each other. The first rod portion 1521 and the second rod portion 1522 form an angle with each other and are not perpendicular, that is, the second connecting rod 1520 is approximately L-shaped. A second movable portion 1523 is provided at the end of the first rod portion 1521 away from the second rod portion 1522, and a second pivot portion 1524 is provided at the second rod portion 1522. The second movable portion 1523 is pivotally connected to the first connecting rod 1510, and the second pivot portion 1524 is pivotally connected to the backrest assembly 400. In this embodiment, the second movable portion 1523 is provided with a second movable protrusion 15231, which is inserted into the drive groove 1513 of the first connecting rod 1510 and can slide along the drive groove 1513. The connection between the first rod portion 1521 and the second rod portion 1522 is pivotally connected to the backrest tube 450 of the backrest assembly 400 via a first connecting shaft 95 (see later description). Furthermore, when the trolley is in the unfolded state, the second movable protrusion 15231 engages with the locking part 226 on the movable frame 220 to better maintain the trolley in the unfolded state. Figure 9 As shown, when the trolley is in the folded state, the second movable protrusion 15231 disengages from the latching portion 226 on the movable frame 220. In other embodiments, the first rod portion 1521 or the second rod portion 1522 may be pivotally connected to the backrest tube 450 of the backrest assembly 400 via the first connecting shaft 95. The second pivot portion 1524 is pivotally connected to the first backrest frame 610 of the backrest assembly 400 via the second connecting shaft 96 (see below for details).

[0184] Specifically, such as Figures 12 to 14 As shown, the backrest assembly 400 includes a first backrest frame 410, a second backrest frame 420, a backrest tube 450, a connecting strap 430, and a strap adjuster 440.

[0185] like Figures 12 to 14As shown, the first backrest frame 410 includes two generally elongated backrest rods 412 and 413 located on the left and right sides of the trolley. The lower ends of the two backrest rods 412 and 413 are pivotally connected to the second pivot portions 1524 of the two second connecting rods 1520 via two second connecting shafts 96, respectively. The second backrest frame 420 is generally U-shaped and includes a backrest horizontal frame 421 and backrest vertical frames 422 connected to both ends of the backrest horizontal frame 421. The upper ends of the two backrest rods 412 and 413 are pivotally connected to both ends of the backrest horizontal frame 421, and the ends of the two backrest vertical frames 422 away from the backrest horizontal frame 421 are pivotally connected to the backrest tube 450. The backrest tube 450 is generally U-shaped. As mentioned above, the two ends of the backrest tube 450 are pivotally connected to the two second connecting rods 1520 via first connecting shafts 95, respectively. Furthermore, the backrest assembly 400 may also include two arc-shaped limiting pieces 460. Each limiting piece 460 is pivotally connected between one end of the backrest tube 450 and one of the second connecting rods 1520. Providing limiting pieces 460 between the backrest tube 450 and the second connecting rod 1520 helps reduce swaying during rotation of the backrest tube 450. The backrest tube 450 can fix a backrest plate (not shown in the figures), and the first backrest frame 410, the second backrest frame 420, and the backrest tube 450 of the backrest assembly 400 can be covered with a covering such as a tarpaulin to form a space for infants and young children to lean against or lie down.

[0186] Furthermore, such as Figure 12 As shown, one end of the connecting strap 430 is connected to the second link 1520 of the link assembly 1500 on one side, and the other end of the connecting strap 430 passes around the side of the backrest tube 450 facing away from the seat assembly 200 and is connected to the second link 1520 of the link assembly 1500 on the other side. A strap adjuster 440 is provided on the connecting strap 430 to adjust the length of the connecting strap 430. In this embodiment, as... Figure 14 As shown, the two ends of the connecting strap 430 are respectively connected to the ends of the second connecting rod 1520 on the same side that are away from the first connecting rod 1510. The connection point of the connecting strap 430 and the second connecting rod 1520 is located on the side of the second connecting shaft 96 away from the first connecting rod 1510, that is, on the upper side of the second connecting shaft 96, that is, on the upper end of the second rod portion 1522.

[0187] Furthermore, the length of the connecting strap 430 can be adjusted between a first length and a second length via the strap adjuster 440. The first length is the minimum length of the connecting strap 430, and the second length is the maximum length of the connecting strap 430. When the connecting strap 430 is at the first length, as... Figure 14 As shown, the backrest tube 450 is at a first tilt angle relative to the seat assembly 200, and the backrest tube 450 and the second backrest frame 420 are in the same plane, with the trolley in seat mode. When the connecting strap 430 is at the second length, as... Figure 15 As shown, the backrest tube 450 is at a second tilt angle relative to the seat assembly 200, and the stroller is in reclining mode. At this time, from... Figure 15 As shown in the side cross-section of the stroller, the backrest tube 450, the second backrest frame 420, the first backrest frame 410, and the second rod portion 1522 of the second connecting rod 1520 are connected end to end to form a roughly rectangular frame structure, allowing the infant's back and head to lie within the space enclosed by the backrest tube 450, the second backrest frame 420, the first backrest frame 410, the second rod portion 1522 of the second connecting rod 1520, and the tarpaulin. The second tilt angle is greater than the first tilt angle.

[0188] Figure 16 The diagram shown illustrates the structure of the trolley after the connecting strap 430 reaches its second length and the pusher frame 120 has reversed direction. Please refer to [other diagrams]. Figure 15 When the pusher arm 120 is rotated to switch the trolley's direction of travel from the first forward direction to the second forward direction, the pusher levers 122 and 123 will drive the first drive lever 610 and the second drive lever 620 to pivot via the pivot shaft 630. The second drive lever 620 will then push the movable frame 220 and the seat frame 230 to move along the seat tube 110 in the third direction D3. Figure 16 This allows the stroller frame 220 and seat frame 230 to be moved rearward (along the D3 direction), thus shifting the center of gravity of the infant or toddler sitting in the seat frame 230 rearward, making it easier for caregivers to push the stroller. Furthermore, as... Figure 15 and Figure 16 As shown, when the trolley's direction of travel changes from the first forward direction to the second forward direction, the first connecting rod 1510 moves in the second forward direction to the first movable part 1511, which is approximately located at the junction of the first groove 2222a and the second groove 2222b. The first connecting rod 1510 extends out of the connecting part 222 through the groove 2221.

[0189] Furthermore, from Figures 14 to 16 As shown, regardless of the length of the connecting strap 430, and regardless of whether the trolley is moving in the first or second direction, as long as the trolley is in the unfolded state, the second movable protrusion 15231 can engage with the snap-fit ​​end 226 on the movable frame 220, thereby limiting the second connecting rod 1520 and fixing the backrest tube 450 at a certain tilt angle.

[0190] The following explanation uses the right side of the stroller as an example to illustrate its folding process. The folding process for the left side of the stroller is roughly the same:

[0191] When it is necessary to fold up the stroller, such as Figure 9 and Figure 10As shown, the first operating member 710 on the pusher frame 120 can be operated, causing the first operating member 710 to drive the first slider 740 to slide towards the pusher body 121 via the first traction member, i.e., in the first direction D1. Simultaneously, as... Figure 12 and Figure 13 As shown, the first slider 740 pushes the first abutting part 732 on the locking pin 730 through the second abutting part 741, causing the locking pin 730 to slide along the first direction D1 until it disengages from the first locking groove 1503a. The retracting locking mechanism 700 releases the lock, and the pusher bracket 120 is pressed down. The pusher bracket 120 and the auxiliary bracket 140 can move towards the seat tube 110, that is... Figure 12 The auxiliary frame 140 rotates and retracts in the second direction D2. During the rotation and retraction process, the movable frame 220 will also slide towards the front end of the seat tube 110 through the linkage of the first drive rod 610 and the second drive rod 620. Figure 12 The third party in the middle slides towards D3. Meanwhile, as... Figure 12 and Figure 14 As shown, the movable frame 220, which slides along the third direction D3, will also be driven by the cooperation of the guide groove 2222 and the first movable protrusion 15111 to first slide along the first groove 2222a, that is, the first connecting rod 1510 slides in the opposite direction of the third direction D3. At the same time, due to the sliding of the movable frame 220, the second movable protrusion 15231 of the second connecting rod 1520 and the engaging end 226 of the movable frame 220 (see...) Figure 13 The engagement is released. When the pusher frame 120 is pressed down further, the pusher frame 120 and the auxiliary frame 140 will pivot further, thereby driving the pivot shaft 97 to move downward and further pulling the first movable protrusion 15111 of the first connecting rod 1510 to slide to the second groove 2222b. As shown in Figure 17, during the process of the first movable protrusion 15111 sliding to the second end 2222d of the guide groove 2222, the included angle between the first connecting rod 1510 and the pusher rods 122 and 123 gradually decreases, which is equivalent to the first connecting rod 1510 rotating clockwise relative to the pivot shaft 97, that is, pivoting along the fourth direction D4 in Figure 17. At the same time, when the first connecting rod 1510 slides, it also drives the engagement of the drive groove 1513 and the second movable protrusion 15231 (see Figure 17). Figure 5 This causes the second connecting rod 1520 to rotate counterclockwise around the first connecting shaft 95, that is, along... Figure 14 Or pivot in the fifth direction D5 in Figure 17. During the rotation of the second link 1520, it also drives the first backrest frame 410 and backrest tube 450, which are pivotally connected to it, along with the entire backrest assembly 400, to pivot and retract towards the seat assembly 200, thereby completing the overall folding of the trolley. Figure 17a and Figure 17bThe diagram shows the trolley in its folded state. In this state, the movable frame 220 slides to a position near the front end of the seat post 110, the first movable protrusion 15111 moves to the second end 2222d, and the second movable protrusion 15231 is approximately located in the middle of the drive groove 1513. The backrest assembly 400, seat assembly 200, and frame 100 are relatively close together and folded, occupying less space and facilitating storage and carrying. At this time, the slide groove 1403 and the second locking groove 1503b are aligned, allowing the first operating member 710 to be released. This allows the first slider 740 to move in the opposite direction of the first direction D1 under the action of the slider reset member (not shown in the diagram) until the locking pin 730 is inserted into the second locking groove 1503b, locking the trolley in the folded state.

[0192] Conversely, when it is necessary to unfold the folded cart, such as... Figure 17a and 17b As shown, the first operating member 710 can be operated, causing the first operating member 710 to drive the first slider 740 to slide towards the pusher body 121, i.e., in the first direction D1, via the first traction member. Simultaneously, the first slider 740 pushes the first abutting part 732 on the locking pin 730 via the second abutting part 741, causing the locking pin 730 to slide along the first direction D1 until it disengages from the second locking groove 1503b, releasing the locking mechanism 700 and disengaging the trolley from its retracted state. At this time, the pusher frame 120 can be lifted, causing the pivot shaft 97 to move upwards. The pivot shaft 97 then causes the first connecting rod 1510 to rotate counterclockwise relative to the pivot shaft 97, along... Figure 17a The fifth direction D5 pivots, causing the first movable protrusion 15111 to slide along the guide groove 2222 from the second end 2222d to the first end 2222c. Simultaneously, the first connecting rod 1510 engages with the drive groove 1513 and the second movable protrusion 15231 (see...). Figure 14 The second link 1520 rotates clockwise around the first connecting shaft 95, that is, in the fourth direction D4. During the rotation of the second link 1520, the first backrest frame 410 and backrest tube 450, along with the entire backrest assembly 400, pivotally extend away from the seat assembly 200, as shown below. Figure 14 As shown. At this time, the slide groove 1403 and the first locking groove 1503a are aligned, and the first operating member 710 can be released, so that the first slider 740 moves in the opposite direction of the first direction D1 under the action of the slider reset member (not shown in the figure) until the locking pin 730 is re-inserted into the first locking groove 1503a, and the trolley is locked in the unfolded state.

[0193] The trolley proposed in the second aspect of this utility model has at least the following technical effects:

[0194] In the aforementioned trolley, the linkage assembly 1500 is movably connected to the frame 100 and the seat assembly 200, and the backrest assembly 400 is movably connected to the seat assembly 200 through the linkage assembly 1500. When the frame 100 switches from the unfolded state to the folded state, the frame 100 can drive the backrest assembly 400 to fold towards the seat assembly 200 through the linkage assembly 1500. The overall folding structure is relatively simple and easy to use.

[0195] Third aspect

[0196] See Figures 18 to 23 ,in particular Figure 18 , 19 According to 25 and 26, a third aspect of this utility model provides a carrier, which can be a child carrier such as a stroller, comprising a frame 100, a seat assembly 200, a backrest assembly 400, and a linkage mechanism 500. The frame 100 includes two opposing side frames 101 and 102 and a push handle 120. The seat assembly 200 is mounted between the two side frames 101 and 102 and is configured to be movable relative to the side frames 101 and 102 in the longitudinal directions P and Q of the frame 100 between a first position and a second position. The backrest assembly 400 is mounted on the seat assembly 200 and is configured to be angularly adjustable relative to the seat assembly 200. The push handle 120 is pivotally connected to the side frames 101 and 102 and is configured to drive the seat assembly 200 to move relative to the side frames 101 and 102 in the longitudinal directions P and Q of the frame 100 when pivoted relative to the side frames 101 and 102. The linkage mechanism 500 is located on one side of the seat assembly 200 and is connected to the backrest assembly 400. The linkage mechanism 500 is configured such that the angle adjustment range of the backrest assembly 400 relative to the seat assembly 200 is the same when the seat assembly 200 is in a first position and a second position.

[0197] It should be understood that the same angle adjustment range of the backrest assembly 400 relative to the seat assembly 200 as described in this article means that when the angle of the backrest assembly 400 relative to the seat assembly 200 is adjusted by the angle adjustment mechanism, the angle of the backrest assembly 400 relative to the seat assembly 200 remains basically the same or unchanged within a certain range when the seat assembly 200 moves from the first position to the second position or from the second position to the first position.

[0198] The frame 100 may include two seatposts 110 disposed on two lateral frames 101, 102. A seat assembly 200 may be disposed on the seatposts 110. In some embodiments, the lateral frame 101 includes a first front foot support rod 161 and a first rear foot support rod 171. The first front foot support rod 161 and the first rear foot support rod 171 are interconnected and form a generally triangular structure with respect to the ground. In some embodiments, the lateral frame 101 further includes a first armrest 132 connected to the first front foot support rod 161 and / or the first rear foot support rod 171, the first armrest 132 being disposed generally parallel to the ground or slightly inclined relative to the ground. In some embodiments, the lateral frame 101 further includes an auxiliary frame 140, the auxiliary frame 140 being pivotally connected to the first armrest 132 and the seat assembly 200, respectively. In other embodiments, the auxiliary frame 140 may also be connected to the first rear foot support rod 171 and form a generally triangular structure with the first armrest 131 and the first rear foot support rod 171. The side frame 102 may have a symmetrical arrangement with the side frame 101, for example, including a second front foot support rod 162, a second rear foot support rod 172, a second handrail 133 and another auxiliary frame 140 respectively symmetrically arranged with the first front foot support rod 161, the first rear foot support rod 171, the first handrail 132 and the auxiliary frame 140.

[0199] The seat assembly 200 is movably (e.g., slidably) mounted on the seat post 110 along the fore-and-aft directions P and Q of the frame 100. In some embodiments, the seat assembly 200 includes a movable frame 220 and a seat bracket 230 mounted on the movable frame 220, the movable frame 220 being movably (e.g., slidably) mounted on the seat post 110 along the fore-and-aft directions P and Q of the frame 100. In some embodiments, the movable frame 220 includes a sliding sleeve 221 ( Figure 21 and Figure 22 (As can be best seen from the image), the sliding sleeve 221 is slidably fitted onto the seat tube 110 along the front-rear direction of the frame 100. It is understood that the movable frame 220 can also be movably mounted on the seat tube 110 along the front-rear direction of the frame 100 in other ways, such as by providing a groove.

[0200] The backrest assembly 400 may include a backrest tube 450 for supporting a backrest panel (not shown). The backrest assembly 400 may be mounted on the seat assembly 200 via the backrest tube 450. In some embodiments, the bottom of the backrest tube 450 is pivotally connected to a movable frame 220, thereby allowing the bottom of the backrest tube 450 to slide relative to the seat tube 110 with the movable frame 220. See also Figure 20 and Figure 25 In some embodiments, the backrest assembly 400 includes an adjustment strap 430 (for clarity, straps in other figures have been omitted, e.g.) Figure 18 and Figure 19The strap is not shown, but Figure 18 and Figure 19 The stroller can be similar to Figure 25 (Set with straps), the two ends of the adjusting strap 430 are connected to the two side frames 101 and 102 respectively, and the upper middle part of the back tube 450 is supported on the adjusting strap 430.

[0201] The stroller frame 120 can pivot relative to the side frames 101 and 102, thereby allowing the stroller 10 to enter a first use position (e.g., forward-facing use position, see [reference]). Figure 18 ) and second usage state (e.g., reverse usage state, see Figure 19 Switching between lateral frames 101 and 102. The pusher arm 120 can be positioned on the outside of the lateral frames 101 and 102 and pivotally connected to them. In some embodiments, the pusher arm 120 is pivotally connected to an auxiliary frame 140 of the lateral frames 101 and 102. In some embodiments, the pusher arm 120 is connected via a pivot shaft 630 (see [reference]). Figure 21 The pivot shaft 630 is pivotally connected to the lateral frames 101 and 102 (e.g., auxiliary frame 140). The pivot shaft 630 may pass through the lateral frames 101 and 102 (e.g., auxiliary frame 140). In other embodiments, the first usage state may also be a reverse usage state, and the second usage state may also be a forward usage state, and is not limited thereto.

[0202] like Figure 20 As shown, the pusher arm 120 can be connected to the seat assembly 200 via the drive assembly 600, for example, to the movable frame 220 of the seat assembly 200. The drive assembly 600 can be configured to convert the pivoting of the pusher arm 120 relative to the lateral frames 101, 102 into movement of the seat assembly 200 in the fore-and-aft direction of the frame 100, for example, converting the pivoting of the pusher arm 120 relative to the lateral frames 101, 102 into movement (e.g., sliding) of the movable frame 220 relative to the seat tube 110 in the fore-and-aft direction of the frame 100.

[0203] In some embodiments, the drive assembly 600 is disposed inside the lateral frames 101, 102. See also... Figure 20 and Figure 21 The pusher frame 120 is connected to the drive assembly 600 via a pin 630 passing through the lateral frames 101 and 102. In some embodiments, the drive assembly 600 is a linkage mechanism.

[0204] In some embodiments, such as Figures 20 to 24As shown, the drive assembly 600 includes a first drive rod 610 and a second drive rod 620 disposed on the side of the movable frame 220 away from the lateral frames 101 and 102. The first end of the first drive rod 610 is connected to the pusher frame 120 via a pin 630. Specifically, one end of the pivot pin 630 is fixedly connected to the pusher frame 120, and the other end of the pivot pin 630 passes through the lateral frame 101 or 102 (e.g., through the auxiliary frame 140) and the seat tube 110 and is fixedly connected to the first end of the first drive rod 610. For example, square holes can be provided on the pusher frame 120 and the first end of the first drive rod 610, and both ends of the pivot pin 630 can be square structures and can be engaged in the square holes, thereby achieving a fixed connection between the pivot pin 630 and the pusher frame 120 and the first end of the first drive rod 610. However, this invention is not limited to this; for example, the pivot pin 630 can be configured according to the first aspect of this invention. Figure 3 and Figure 4 The described connection method connects to components such as the push handle frame 120 and the first drive rod 610. The second end of the first drive rod 610 is pivotally connected to the first end of the second drive rod 620. For example, another pivot shaft (not shown) can pass through the second end of the first drive rod 610 and the first end of the second drive rod 620 and be fixed to the movable frame 220, so that the second end of the first drive rod is pivotally connected to the first end of the second linkage drive rod and can pivot relative to the movable frame 220. Further, this other pivot shaft can also pass through the backrest tube 450 to achieve a pivot connection between the backrest tube 450 and the movable frame 220, and when the movable frame 220 moves along the fore-and-aft directions P and Q of the frame 100, the backrest tube 450 can move synchronously with the movable frame 220. The second end of the second drive rod 620 is connected to the seat assembly 200, for example, to the movable frame 220. When the pusher arm 120 pivots relative to the lateral frames 101, 102, the pusher arm 120 can drive the first drive rod 610 to rotate via the pivot shaft 630, and drive the seat assembly 200 to move along the fore-and-aft direction of the frame 100 via the second drive rod 620, for example, driving the movable frame 220 to move (e.g., slide) relative to the seat post 110 along the fore-and-aft direction of the frame 100. It is understood that the above description is only an example of the drive assembly 600, and the drive assembly 600 can also adopt other configurations. For example, the first drive rod 610 and the second drive rod 620 can be arranged between the lateral frames 101, 102 and the seat post 110. For example, the number of drive rods can be varied, and other non-linkage drive mechanisms can also be used.

[0205] Please see Figure 18 and Figure 19In the stroller provided by this utility model, when the user rotates the pusher frame 120, the pusher frame 120 drives the movable frame 220 to move relative to the seat tube 110 in the front-back direction of the frame 100 through the drive assembly 600. At this time, the bottom of the backrest tube 450 will move synchronously with the movable frame 220, thereby causing the angle of the backrest tube 450 relative to the seat assembly 200 to change.

[0206] The third aspect of this utility model provides a linkage mechanism 500, which can be configured such that when the pusher arm 120 pivots relative to the transverse frames 101 and 102, the backrest assembly 400 moves relative to the transverse frames 101 and 102 along the front-rear direction of the frame 100 without changing its angle relative to the seat assembly 200. Specifically, the linkage mechanism 500 can be connected to the pusher arm 120 or the seat assembly 200 on the one hand, and to the adjusting strap 430 of the backrest assembly 400 on the other hand, so that when the pusher arm 120 pivots relative to the transverse frames 101 and 102, the adjusting strap 430 drives the upper middle part and the bottom of the backrest tube 450 to move synchronously, thus enabling the backrest tube 450 and the movable frame 220 to move synchronously along the front-rear direction of the frame without pivoting relative to the movable frame 220. It should be understood that the upper middle part of the backrest tube 450 mentioned in this article is relative to the bottom of the backrest tube 450, and refers to a position at a certain distance from the bottom of the backrest tube 450. The backrest assembly 400 is supported by the bottom of the backrest tube 450 being pivotally connected to the movable frame 220 and the middle part of the backrest tube 450 cooperating with the adjusting strap 430.

[0207] The linkage mechanism 500 of this utility model is described in detail below with reference to the first embodiment, the second embodiment and the third embodiment.

[0208] Please see Figures 18-24 In the first embodiment, the linkage mechanism 500 is connected to the ends of the seat assembly 200 (e.g., the movable frame 220) and the adjustment strap 430, respectively, and is configured to drive the ends of the adjustment strap 430 to move synchronously with the seat assembly 200 when the seat assembly 200 moves in the fore-and-aft direction along the frame 100. Since the upper middle part of the backrest tube 450 is supported on the adjustment strap 430, the upper middle part and the bottom of the backrest tube 450 move synchronously with the seat assembly 200 without changing the angle between the backrest tube 450 and the seat assembly 200.

[0209] See Figures 20-24The linkage mechanism 500 may include a linkage rod 510. A first end of the linkage rod 510 is connected to the seat assembly 200, for example, to the movable frame 220. A second end of the linkage rod 510 is movably mounted to the lateral frames 101, 102 relative to the frame 100 in the fore-and-aft direction and is fixedly connected to the end of the adjusting strap 430, such that when the seat assembly 200 moves relative to the lateral frames 101, 102 in the fore-and-aft direction of the frame 100, the first end of the linkage rod 510 drives the second end of the linkage rod 510, and thus drives the end of the adjusting strap 430 to move in the fore-and-aft direction P, Q, thereby driving the upper middle portion of the backrest tube 450 to move in the fore-and-aft direction P, Q. In this way, when the seat assembly 200 moves relative to the lateral frames 101 and 102 in the front-rear direction along the frame 100, the upper middle part of the backrest tube 450 and the bottom of the backrest tube 450 can move synchronously, so that it will not pivot relative to the seat assembly 200 and change its angle relative to the seat assembly 200.

[0210] See Figure 21 The linkage 510 is disposed between the lateral frames 101 and 102 and the seat assembly 200, for example, between the lateral frames 101 and 102 and the movable frame 220. Specifically, the lateral frames 101 and 102 are provided with first slide grooves 1303 extending along the longitudinal direction P and Q of the frame, and the second end of the linkage 510 is slidably mounted to the first slide groove 1303. Furthermore, the first slide groove 1303 is disposed on the armrests 132 and 133. In some embodiments, the length of the first slide groove 1303 is the same as the distance that the seat assembly 200 moves from its first position to its second position. It is understood that the length of the first slide groove 1303 may not be the same as the distance that the seat assembly 200 moves from its first position to its second position; for example, the length of the first slide groove 1303 may be greater than this distance.

[0211] like Figures 21 to 24 As shown, the first end of the linkage rod 510 is connected to the movable frame 220. Specifically, the first end of the linkage rod 510 facing the movable frame 220 has a first protrusion 512, and the movable frame 220 has a groove or through hole 214 for receiving the first protrusion 512 (see...). Figure 22 and Figure 24 The first protrusion 512 engages with the groove or through hole 214 to connect the linkage rod 510 to the movable frame 220. In some embodiments, the movable frame 220 is provided with a through hole 214 for receiving the first protrusion 512, and a second protrusion 212 extends from the through hole 214 in a direction away from the linkage rod 510 (see...). Figure 24 The first protrusion 512 passes through the second protrusion 212. In some embodiments, see [reference needed]. Figure 23 and Figure 24The movable frame 220 may have a recess 213 on the side facing the linkage rod 510, corresponding to the position of the groove or through hole 214. The first end of the linkage rod 510 may be received in the recess 213, which may restrict the first end of the linkage rod 510 from rotating counterclockwise relative to the movable frame 220. In some embodiments, the linkage mechanism 500 further includes an elastic element 520 (e.g., a torsion spring). One end of the elastic element 520 is arranged around the periphery of the second protrusion 212, and the other end of the elastic element 520 is hooked on the side of the linkage rod 510 away from the movable frame 220, thereby restricting the first end of the linkage rod 510 from rotating clockwise relative to the movable frame 220. Specifically, when the pusher frame 120 moves from the first use state (see...) Figure 18 ) to the second usage state (see Figure 19 During pivoting, the recess 213 can restrict the counterclockwise rotation of the first end of the linkage 510, thereby driving the second end of the linkage 510 to slide together with the first end along the first direction P (see...). Figure 24 ); and when the pusher 120 is in its second use state (see Figure 19 ) to the first usage state (see Figure 18 During pivoting, the elastic element 520 can restrict the clockwise rotation of the first end of the linkage rod 510, thereby driving the second end of the linkage rod 510 to slide together with the first end along the second direction Q (see...). Figure 24 ).

[0212] The movable frame 220 may include a sliding sleeve 221 and a mounting portion 224. The sliding sleeve 221 is sleeved on the outside of the seat tube 110 and can move along the seat tube 110. The mounting portion 224 is provided on the upper side of the sliding sleeve 221. A groove or through hole 214, a recess 213, and a second protrusion 212 may all be provided on the mounting portion 224.

[0213] In the first embodiment provided by this utility model, when the user rotates the push handle 120 to the first use state (see [reference]), Figure 18 ) and second usage state (see Figure 19 When switching between the seat assembly and the backrest assembly, the pusher arm 120 drives the movable frame 220 of the seat assembly 200 to move (e.g., slide) along the front-rear direction of the frame 100 on the seat tube 110 via the transmission mechanism 600. The bottom of the backrest tube 450 of the backrest assembly 400 moves along the front-rear direction of the frame 100 with the movable frame 220. At the same time, the movable frame 220 drives the linkage rod 510 as a whole (i.e., the first end and the second end) to move along the front-rear direction of the frame 100, thereby driving the end of the adjusting strap 430 and thus the upper middle part of the backrest tube 450 to move along the front-rear direction of the frame 100 with the seat assembly 200. In this way, the upper middle part and the bottom of the backrest tube 450 move synchronously with the seat assembly 200, so as not to change the angle of the backrest assembly 400 relative to the seat assembly 200.

[0214] See Figures 25 to 32 In the second embodiment, the linkage mechanism 500 is connected to the ends of the pusher frame 120 and the adjusting strap 430 respectively, and is configured to cause the ends of the adjusting strap 430 to move synchronously with the seat assembly 200 when the pusher frame 120 pivots relative to the frame 100.

[0215] Specifically, see Figure 27 and Figure 28 The linkage mechanism 500 includes a transmission assembly 530 and a slider 540. The slider 540 is slidably disposed on the lateral frames 101 and 102 along the longitudinal directions P and Q of the frame 100 and is connected to the end of the adjusting strap 430. The transmission assembly 530 is connected to a pivot shaft 630 passing through the lateral frames 101 and 102 (e.g., auxiliary frame 140) and the slider 540, respectively. The transmission assembly 530 is configured to convert the pivoting of the pusher frame 120 relative to the lateral frames 101 and 102 (i.e., the rotation of the pivot shaft 630) into the sliding of the slider 540 along the longitudinal direction of the frame 100, thereby driving the end of the adjusting strap 430 and thus the upper middle part and the bottom of the backrest tube 450 to move synchronously.

[0216] Specifically, the transmission assembly 530 may include a drive gear 531, one or more driven gears 532, and an output gear 533. The drive gear 531 may be connected to the pivot shaft 630 via a traction member 550 and a drive wheel 560. Specifically, the drive wheel 560 is fixedly connected to the pivot shaft 630 and is capable of rotating with the pivot shaft 630; for example, the drive wheel 560 may be sleeved on the pivot shaft 630. See also Figure 28 The traction member 550 is connected to both the drive wheel 560 and the linkage gear 531. When the drive wheel 560 rotates, it can drive the linkage gear 531 to rotate via the traction member 550. For example, the traction member 550 can be a cable. One end of the cable is fixed to a first position on the linkage gear 531, and the other end extends to the drive wheel 560, passes around the drive wheel 560, extends back to the linkage gear 531, and is fixed to a second position opposite to the first position. The portion of the cable wound around the drive wheel 560 is also fixed to a certain position on the drive wheel 560 (e.g., ...). Figure 28 (At position R shown), when the drive wheel 560 rotates, the lengths of the cable portions on both sides of the drive wheel 560 and the linkage gear 531 change, causing the linkage gear 531 to rotate as well. The linkage gear 531 meshes with one or more driven gears 532, which in turn mesh with the output gear 533. The output gear 533 meshes with the sliding member 540, thus enabling the rotation of the linkage gear 533 to drive the sliding member 540 to move along the front-rear direction of the frame 100. The sliding member 540 may be provided with teeth 541 (see...). Figure 29This facilitates engagement with the output gear 533. Since the pivot shaft 630 has a small rotation angle, by providing one or more driven gears 532, and ensuring that the teeth of the driven gears 532 are smaller than those of the linkage gear 531, the small angle of rotation of the linkage gear 531 can be amplified into a larger angle of rotation of the output gear 533, allowing the slider 540 to move a greater distance. It should be understood that the above detailed description is merely illustrative, and those skilled in the art can make several adjustments, variations, and improvements. For example, the drive wheel 560 can be omitted, and the traction member 550 can be connected to both the pivot shaft 630 and the linkage gear 531, respectively. When the pivot shaft 630 rotates, it can drive the linkage gear 531 to rotate via the traction member 550. For example, where appropriate, one or more driven gears 532 or output gears 533 can be omitted, and the linkage gear 531 can directly mesh with the slider 540. Furthermore, the number of driven gears 532 can be adjusted according to actual conditions.

[0217] In some embodiments, the linkage mechanism 500 is disposed inside the side frames 101 and 102, so that the linkage mechanism 500 is not visible to the user. In some embodiments, the side frames 101 and 102 have one or more cavities, and the transmission assembly 530, the slider 540, the traction member 550 and the drive wheel 560 are all disposed in one or more cavities of the side frames 101 and 102.

[0218] In some embodiments, the transmission assembly 530 (including a linkage gear 531, one or more driven gears 532 and an output gear 533) and the sliding member 540 are both disposed in the cavities within the handrails 132 and 133. The drive wheel 560 is disposed in the cavity of the auxiliary frame 140 and is connected to the linkage gear 531 via a traction member 550.

[0219] like Figure 30-32 As shown, the slider 540 may include a sliding portion 543 and a connecting portion 542, and teeth 541 may be provided on the connecting portion 542. The connecting portion 542 is used to mesh with the output gear 533. When the driven gear 531 rotates, the driven gear 532 and the output gear 533 can drive the connecting portion 542, and thus drive the sliding portion 543 to slide in the front-rear direction of the frame 100.

[0220] like Figures 29 to 32 As shown, the stroller also includes a mounting base 1700 disposed in the cavities within the armrests 132 and 133. The mounting base 1700 includes a housing 1710, and a baffle 1711 is provided on the inner wall of the housing 1710, dividing the housing 1710 into a first accommodating space 1701 and a second accommodating space 1702. The sliding portion 543 of the slider 540 can be disposed in the first accommodating space 1701 and is slidably disposed on the baffle 1711. See also... Figure 30 The baffle 1711 may be provided with a first limiting portion 1712 and a second limiting portion 1713 on both sides to limit the sliding limit position of the sliding portion 543. The distance between the first limiting portion 1712 and the second limiting portion 1713 in the longitudinal direction of the frame 100 may be the same as the distance the seat assembly 200 moves in the longitudinal direction of the frame 100 between its first position and its second position. The linkage gear 531, one or more driven gears 532 and output gear 533 may be provided in the second accommodating space 1702, at least one of which meshes with the connecting portion 542 of the sliding member 540. The inner wall of the baffle 1711 may be provided with one or more protrusions (such as...) in the second accommodating space 1702. Figure 31 ), used to mount the drive gear 531, one or more driven gears 532 and output gear 533.

[0221] like Figures 30 to 32 As shown, the mounting base 1700 may further include a cover 1720, which can be mounted to the housing 1710 and together with the housing 1710 defines a second receiving space 1702. A drive gear 531, one or more driven gears 532, and an output gear 533 may be disposed between the cover 1720 and the housing 1710. One end of the connecting portion 542 of the slider 540 is provided with teeth 541 and can extend across the upper end of the cover 1720 and outwards from the cover 1720. An opening 1722 may be provided on the outer side of the cover 1720 (see...). Figure 31 The linkage gear 531, one or more driven gears 532 or output gear 533 can engage with the connecting portion 542 of the slider 540 through the opening 1722.

[0222] Specifically, such as Figure 31 As shown, a step 1721 may be provided on the outer side of the cover 1720, and one end of the connecting portion 542 of the slider 540 is provided with teeth 541, which can extend to the step 1721. An opening may be provided on the step 1721, through which the teeth of the linkage gear 531, one or more driven gears 532 or output gear 533 may extend to mesh with the teeth 541 of the slider 540.

[0223] In some embodiments, please refer to Figure 25The lateral frames 101 and 102 (e.g., armrests 132 and 133) are provided with second slide grooves 1304 extending along the longitudinal direction P and Q of the frame 100. The end of the adjusting strap 430 can pass through the second slide groove 1304 and be fixedly connected to a sliding member 540 disposed in the cavity of the lateral frames 101 and 102. The end of the adjusting strap 430 can slide in the second slide groove 1304. When the sliding member 540 slides along the longitudinal direction of the frame 100, it can drive the end of the adjusting strap 430 to move along the longitudinal direction of the frame 100 in the second slide groove 1304. The length of the second slide groove 1304 along the longitudinal direction of the frame 100 can be the same as the distance that the seat assembly 200 moves along the longitudinal direction of the frame 100 between its first and second positions. It is understood that in other embodiments, the length of the second slide 1304 along the front-rear direction of the frame 100 may also be different from the distance by which the seat assembly 200 moves along the front-rear direction of the frame 100 between its first and second positions, and is not limited thereto.

[0224] In some embodiments, see Figure 31 The sliding member 540 may be provided with a groove or a through hole 544 for connection with the end of the adjusting belt 430.

[0225] In the second embodiment provided by this utility model, when the user rotates the push handle 120 to switch between the first and second use states, the pivot shaft 630 rotates with the push handle 120, thereby driving the drive wheel 560 to rotate. The rotation of the drive wheel 560 drives the linkage gear 531 to rotate through the traction member 550, thereby driving the sliding member 540 to slide through one or more driven gears 532 and output gears 533, and thus driving the end of the adjusting strap 430 to move along the front-rear direction of the frame 100, and causing the upper part of the backrest tube 450 and the bottom of the backrest tube 450 to move synchronously to prevent changes in the angle between the backrest assembly 400 and the seat assembly 200.

[0226] Please see Figure 33 and Figure 34 In the third embodiment, the difference from the first and second embodiments is that the linkage mechanism 500 includes a guide 580 and a connector 590. The guide 580 is attached to the frame 100, for example, to the transverse frames 101 and 102, or to the armrests 132 and 133 of the transverse frames 101 and 102. The end of the adjusting strap 430 passes through the guide 580 and connects to the connector 590. The connector 590 is connected to the seat assembly 200 and can move with the seat assembly 200 in the fore-and-aft directions P and Q of the frame 100, thereby causing the backrest tube 450 to move synchronously with the seat assembly 200 through the adjusting strap 430.

[0227] The guide member 580 supports the end of the adjustment strap 430, allowing the backrest tube 450 to be supported on the middle portion of the adjustment strap 430. When the seat assembly 200 moves along the fore-and-aft directions P and Q of the frame 100, the end of the adjustment strap 430 moves via the connector 590, causing a change in the length of the portion of the adjustment strap 430 between the guide member 580 and the backrest tube 450. This, in turn, causes the upper middle portion of the backrest tube 450 to move along the fore-and-aft directions P and Q of the frame 100. Specifically, when the seat assembly 200 moves forward in the P direction, the length of the portion of the adjustment strap 430 between the guide member 580 and the backrest tube 450 shortens, causing the upper middle portion of the backrest tube 450 to move forward. When the seat assembly 200 moves backward in the Q direction, the length of a portion of the adjusting strap 430 between the guide 580 and the backrest tube 450 increases, thereby causing the upper middle part of the backrest tube 450 to move backward.

[0228] The guide 580 is positioned such that, after the end of the adjusting strap 430 passes through it, the upper middle portion of the backrest tube 450 can be supported on the adjusting strap 430. For example, the guide 580 is typically positioned above the bottom of the backrest tube 450, for example, attached to the transverse frames 101, 102, or to the handrails 132, 133 of the transverse frames 101, 102. The guide 580 can be, for example, a smooth cylindrical rod, allowing the portion of the adjusting strap 430 passing through the guide 580 to slide on it. The guide 580 can also be, for example, a roller, to facilitate the sliding of the portion of the adjusting strap 430 passing through it. It is understood that the guide 580 is not limited to these configurations and can be other arrangements, as long as they provide support for the portion of the adjusting strap 430 passing through it and allow the portion of the adjusting strap 430 to slide on it. The number of guide members 580 can be one or more, depending on actual needs. In some embodiments, the connector 590 can be a separate connector, such as a cable, which is connected to the ends of the seat assembly 200 (e.g., the movable frame 220 or the seat) and the adjustment strap 430, respectively. In some embodiments, the connector 590 is part of the adjustment strap 430, or the connector 590 can be integrally formed with the adjustment strap 430; in other words, the end of the adjustment strap 430 can be directly connected to the seat assembly 200 after passing through the guide member 580. It is understood that the connector 590 is not limited to these and can adopt other configurations, as long as the above functions can be achieved.

[0229] In the third embodiment of this utility model, when the seat assembly 200 moves along the front-rear direction of the frame 100, the end of the adjusting strap 430 moves via the connector 590, thereby causing a change in the length of the portion of the adjusting strap 430 between the guide 580 and the backrest tube 450, which in turn causes the upper middle part of the backrest tube 450 to move along the front-rear direction of the frame 100. Since the upper middle part of the backrest tube 450 can move synchronously with the bottom of the backrest tube 450, the angle between the backrest assembly 400 and the seat assembly 200 is prevented from changing.

[0230] Fourth aspect

[0231] Figure 35 and Figure 36 A perspective view of a vehicle 1000 according to a fourth aspect of the present invention is shown. The vehicle 1000 has a handrail mounting unit 300, which will be described in conjunction with the following description of the vehicle 1000.

[0232] exist Figure 35 In the illustrated embodiment, the carrier 1000 is exemplarily described using a child carrier such as a stroller. It will be understood that in some alternative embodiments, the type of carrier 1000 is not limited to a stroller, but may be, for example, a high chair, a high chair, a tricycle, etc.

[0233] See Figure 35 The child vehicle 1000 includes a frame 100 and a seat assembly 200. The frame 100 may include a push handle 120, armrests 130, a front leg support 160, a rear leg support 170, etc. The frame 100 is generally symmetrical. The frame 100 also includes two symmetrically arranged seat posts 110 for mounting the seat assembly 200. The seat assembly 200 includes a seat frame 230 mounted between the two seat posts 110. In some embodiments, the seat frame 230 may be padded to provide a comfortable seat for the child. The armrests 130 include two symmetrically arranged armrests 132, 133 located above the seat assembly 200, thereby defining the child's lateral range of motion. The armrest frame 130 also includes an armrest body 131, which is positioned above the seat assembly 200 and arranged horizontally. The left and right ends of the armrest body 131 are detachably connected to corresponding armrest bars 132 and 133 via armrest mounting units 300 provided in the fourth aspect of this utility model. See also... Figure 35 When the handrail body 131 is connected between the two handrail bars 132 and 133, the handrail body 131 can limit the child's forward range of movement. See also Figure 36When the armrest body 131 is separated from the armrest bars 132 and 133, the armrest body 131 no longer restricts the child's forward movement, which makes it easier for the child to sit on the seat assembly 200 from outside the child vehicle or to get off the seat assembly 200.

[0234] In some alternative embodiments, the armrest body 131 may be detachably connected at only one end to the corresponding armrest bar 132, 133 via the armrest mounting unit 300 provided in the fourth aspect of the present invention, and the other end of the armrest body 131 may be detachably or non-detachably connected to the corresponding armrest bar 132, 133 via other suitable structures (e.g., pivotal connection). For example, in some alternative embodiments, the other end of the armrest body 131 may be pivotally connected to the corresponding armrest bar 132, 133 via a pivot, which may be perpendicular to or inclined relative to the horizontal plane. When one end of the armrest body 131 is separated from the corresponding armrest bar 132, 133, the other end of the armrest body 131 may swing left and right about the pivot, thereby releasing the restraint on the child sitting on the seat assembly 200, allowing the child to easily get off the seat assembly 200.

[0235] See Figures 35 to 38 The handrail mounting unit 300 provided in the fourth aspect of this utility model includes a first connecting seat 310, a first magnetic member 330, a second connecting seat 320, and a second magnetic member 348. The first connecting seat 310 is connected to the handrail bars 132 and 133, and the second connecting seat 320 is connected to the handrail body 131. Of course, in some alternative embodiments, the first connecting seat 310 can be connected to the handrail body 131, while the second connecting seat 320 is connected to the handrail bars 132 and 133. The first connecting seat 310 is provided with a locking part 327. The first magnetic member 330 is disposed on the first connecting seat 310. The second connecting seat 320 is provided with a locking member 341. The second magnetic member 348 is disposed on the second connecting seat 320.

[0236] When the handrail body 131 needs to be installed onto the handrails 132 and 133, the first connecting seat 310 and the second connecting seat 320 are detachably connected by the detachable engagement of the engaging member 341 and the matching part 327, and by the magnetic attraction of the first magnetic member 330 and the second magnetic member 348. When the handrail body 131 needs to be removed from the handrails 132 and 133, the first connecting seat 310 and the second connecting seat 320 can be separated after releasing the engagement of the engaging member 341 and the matching part 327. The handrail installation unit 300 provided in this embodiment of the present invention has a relatively simple structure, and the engagement of the engaging member 341 and the matching part 327, as well as the magnetic attraction of the first magnetic member 330 and the second magnetic member 348, provide double protection for the connection of the first connecting seat 310 and the second connecting seat 320.

[0237] In some embodiments, the first magnetic attractor 330 and the second magnetic attractor 348 may both be made of permanent magnets, or one of the first magnetic attractor 330 and the second magnetic attractor 348 may be made of permanent magnets and the other may be made of a magnetic material that can be attracted by permanent magnets.

[0238] Figure 39 and Figure 40 An exploded view of an exemplary embodiment of the first connecting seat 310 is shown. In some embodiments, the first connecting seat 310 includes a connecting body 3101 and a mounting seat 370. The connecting body 3101 is connected to the handrails 132, 133. More specifically, the connecting body 3101 may be mounted on or integrally formed with the handrails 132, 133. The mounting seat 370 is mounted on the connecting body 3101 by a fastening mechanism 376. A locking portion 327 is disposed on the mounting seat 370 and includes at least one engaging groove 312 for detachably engaging with a locking member 341. The locking member 341 has, for example, at least one engaging portion 34111 protruding into the engaging groove 312 (see below for details). Figure 41 and Figure 42 (As described), the engaging portion 34111 is used to detachably engage with the engaging groove 312. By providing the engaging groove 312 on the mounting base 370, and mounting the mounting base 370 on the connecting body 3101 by means of the fastening mechanism 376, the connecting body 3101 with the same structure can be connected to different second connecting bases 320 by assembling different mounting bases 370, and thus match different models of handrail bodies 131, thereby effectively improving the versatility of the first connecting base 310. In some embodiments, the mounting base 370 can be detachably mounted on the outer surface of the connecting body 3101 by means of the fastening mechanism 376, so that the mounting base 370 can be easily installed on the connecting body 3101. In some embodiments, the mounting base 370 and the connecting body 3101 can be, for example, integrally molded parts.

[0239] Figure 39 and Figure 40 An exemplary embodiment of the fastening mechanism 376 is shown. The outer surface 3102 of the connecting body 3101 is provided with a locking hole 3106 and a first mounting hole 3107. The mounting base 370 has a second elastic arm 3761 and a connecting hole 377 at opposite ends. The second elastic arm 3761 engages with the locking hole 3106, and a fastener (e.g., a screw) 3762 passes through the connecting hole 377 and connects to the first mounting hole 3107. The fastening mechanism 376 includes the second elastic arm 3761 and the fastener 3762. Of course, the implementation of the fastening mechanism 376 is not limited to the above example. For example, in some alternative embodiments, the fastening mechanism 376 may include at least two fasteners (e.g., screws), and the mounting base 370 is non-rotatably mounted on the connecting body 3101 by these at least two fasteners.

[0240] See Figure 39 In some embodiments, the outer surface 3102 of the connecting body 3101 has a positioning groove 3103, and the mounting base 370 is non-rotatably mounted in the positioning groove 3103. The positioning groove 3103 is, for example, a non-circular groove, and the portion of the mounting base 370 located within the positioning groove 3103 matches the shape of the positioning groove 3103. In some embodiments, the positioning groove 3103 is, for example, a U-shaped groove, having a limiting bottom 3104 and an opening 3109 opposite to the limiting bottom 3104. A locking hole 3106 is located near the limiting bottom 3104, and a first mounting hole 3107 is located near the opening 3109. A first end of the mounting base 370 abuts against the limiting bottom 3104, and a second elastic arm 3761 extends outward from the first end of the mounting base 370 to engage with the locking hole 3106. A second end of the mounting base 370 is located near the opening 3109 and has a connecting hole 377, with an engaging groove 312 located in the middle of the mounting base 370. In some embodiments not shown, the mounting base 370 may be mounted on the connecting body 3101 via a pivot (not shown), which may be formed, for example, by a bolt and serve as a fastening mechanism for mounting the mounting base 370 to the body 3101, allowing the mounting base 370 to rotate relative to the body 3101. It is understood that the pivot arrangement should not affect the engagement of the engaging groove 312 with the engaging member 341, nor the arrangement of the first magnetic member 330 and its magnetic attraction with the second magnetic member 348.

[0241] See Figure 39 and Figure 40 In some embodiments, a countersunk head 3108 may be provided on the connecting body 3101 at the position corresponding to the first mounting hole 3107, and a boss 378 may be provided on the mounting base 370 at the position corresponding to the connecting hole 377. With the boss 378 and the countersunk head 3108 engaging with each other, the connecting hole 377 and the first mounting hole 3107 are aligned, facilitating the installation of the fastener 3762. Of course, in some alternative embodiments, the positions of the countersunk head 3108 and the boss 378 on the connecting body 3101 and the mounting base 370 may be interchanged.

[0242] See Figure 39 In some embodiments, the card-dispensing portion 327 includes, for example, a protrusion 371, on which a engaging groove 312 is disposed. See also Figure 37The engaging member 341 includes, for example, at least one first elastic arm 3411 located within the second connecting seat 320, each first elastic arm 3411 having the aforementioned engaging portion 34111. The protrusion 371 of the dispensing portion 327 is adapted to extend into the second connecting seat 320, and the engaging groove 312 follows the protrusion 371 into the second connecting seat 320 to engage with the engaging portion 34111 of the first elastic arm 3411, thereby connecting the second connecting seat 320 and the first connecting seat 310. At this time, the first magnetic attractor 330 and the second magnetic attractor 348 approach each other to achieve the desired magnetic attraction position.

[0243] See Figures 38 to 40 This embodiment also illustrates an exemplary installation method of the first magnetic member 330. Specifically, the mounting base 370 has a first receiving cavity 3710, the opening of which faces the connecting body 3101 and can be covered by the connecting body 3101. The bottom of the first receiving cavity 3710 extends into the protrusion 371. The first magnetic member 330 is installed at the bottom of the first receiving cavity 3710 through the opening, allowing the first magnetic member 330 to be as close as possible to the second magnetic member 348 of the second connecting base 320. The first magnetic member 330 located in the first receiving cavity 3710 will not detach from the first receiving cavity 3710 due to the obstruction of the connecting body 3101.

[0244] See Figures 38 to 40 In some embodiments, the outer surface 3102 of the connecting body 3101 may also be provided with a positioning post 3105. For example, the positioning post 3105 is disposed in the groove wall of the positioning groove 3103, and the positioning post 3105 extends into the first receiving cavity 3710 through the opening of the first receiving cavity 3710. The cooperation between the positioning post 3105 and the first receiving cavity 3710 can improve the mechanical properties of the mounting base 370. In some embodiments, the positioning post 3105 can abut against the first magnetic member 330 to prevent the first magnetic member 330 from shaking in the first receiving cavity 3710.

[0245] Of course, the implementation of the first magnetic member 330 is not limited to the examples described above. For example, in some alternative embodiments, the first magnetic member 330 is integrally formed with the mounting base 370 by overmolding. In other alternative embodiments, at least a portion of the mounting base 370 (e.g., protrusion 371) may be made of magnetic material and serve as the first magnetic member 330.

[0246] Figure 41 and Figure 42An exploded view of an exemplary embodiment of the second connector 320 is shown. In some embodiments, the second connector 320 has a first receiving space 323 and an insertion hole 3222 communicating with the first receiving space 323. A second magnetic chuck 348 and a locking member 341 are mounted, for example, within the first receiving space 323. The insertion hole 3222 is used for inserting or withdrawing a card-dispensing portion 327 into the first receiving space 323. As previously described, the locking member 341 includes, for example, at least one first resilient arm 3411 located in the first receiving space 323. The locking member 341 is detachably engaged with a locking groove 312 of the card-dispensing portion 327 entering the first receiving space 323 via a locking portion 34111 of the first resilient arm 3411, thereby detachably connecting the first connector 310 and the second connector 320, and positioning the first magnetic chuck 330 and the second magnetic chuck 348 in a desired magnetic attraction position. See also Figure 41 The card distribution unit 327 moves relative to the insertion hole 3222 in the insertion direction T, so that the card distribution unit 327 enters or leaves the first receiving space 323 through the insertion hole 3222.

[0247] Figure 41 and Figure 42 An exemplary embodiment of mounting the second magnetic member 348 and the engaging member 341 into the first receiving space 323 is shown. The second connector 320 is provided with a second mounting hole 3231 communicating with the first receiving space 323. This second mounting hole 3231 and the insertion hole 3222 are located on different surfaces of the second connector 320; for example, the second mounting hole 3231 and the insertion hole 3222 are located on two generally perpendicular or intersecting surfaces of the second connector 320. The second magnetic member 348 and the engaging member 341 are mounted on a support 349, which is inserted into the first receiving space 323 through the second mounting hole 3231 and secured to the second connector 320 by a fastener 3492. The fastener 3492 is, for example, a screw, which passes through a hole 3229 in the second connector 320 and connects to a hole 3498 in the support 349. Of course, in other embodiments, the second magnetic member 348 and the locking member 341 can be mounted on the second connector 320 by other suitable structures.

[0248] Figure 41 and Figure 42 An exemplary embodiment of the second magnetic member 348 is shown. Specifically, the support 349 is provided with a boss 3495, which protrudes toward the insertion hole 3222. The boss 3495 forms a second receiving cavity 34950. See also Figure 38The second receiving cavity 34950 has a bottom 34951 and an opening 34952, with the bottom 34951 closer to the insertion hole 3222 than the opening 34952. A second magnetic member 348 is received in the bottom 34951 of the second receiving cavity 34950 to allow the second magnetic member 348 to approach the first magnetic member 330 as closely as possible. The opening 34952 of the second receiving cavity 34950 can be limited by the second connecting seat 320 to prevent the second magnetic member 348 from accidentally dislodging from the second receiving cavity 34950. Of course, the implementation of the second magnetic member 348 is not limited to the examples described above. In some alternative embodiments, the second magnetic member 348 can be integrally formed with the support 349 by overmolding, or at least a portion of the support 349 (e.g., the boss 3495) can be made of magnetic material and serve as the second magnetic member 348.

[0249] Figure 41 and Figure 42 An exemplary embodiment of the engaging member 341 is shown. The engaging member 341 may include two first elastic arms 3411, the first ends of which are connected to each other, for example, by a fixing part 3412, which is fixed to a support 349. In some alternative embodiments, the first ends of the two first elastic arms 3411 are separated from each other and respectively fixed to the support 349. The second ends of the two first elastic arms 3411 are opposite each other, and the two first elastic arms 3411 are used to hold the engaging groove 312.

[0250] It is understood that during the process of the card-dispensing part 327 entering the first receiving space 323 through the insertion hole 3222, when the card-dispensing part 327 abuts against the two first elastic arms 3411, the two first elastic arms 3411 can elastically deform and open to allow the card-dispensing part 327 to continue moving into the first receiving space 323. When the engaging part 34111 of the two first elastic arms 3411 is opposite to the engaging groove 312, the two first elastic arms 3411 automatically reset and engage with the engaging groove 312 through the engaging part 34111. When it is necessary to release the engaging part 341 and the card-dispensing part 327, force is applied to the two first elastic arms 3411 to open them, so that the engaging part 34111 moves away from the engaging groove 312, and then the card-dispensing part 327 can be removed from the insertion hole 3222.

[0251] See Figure 41 and Figure 42The fixing part 3412 is connected to the support 349, for example, via a mounting post 3497. In some embodiments, the fixing part 3412 has a hole 34120, and the mounting post 3497 is disposed on the support 349 and is used to pass through the hole 34120. The support 349 may also be provided with a spacer 3491, which is located near the first ends of the two first elastic arms 3411 and spaced apart from the mounting post 3497. When the dispensing part 327 is not in the first receiving space 323, the two first elastic arms 3411 can abut against the spacer 3491 located between them, which can position the engaging member 341 and prevent the engaging member 341 from rotating around the mounting post 3497 and failing to engage with the engaging groove 312.

[0252] See you again Figure 39 In some embodiments, the engaging groove 312 may include an annular groove disposed on the outer peripheral wall of the protrusion 371. See also Figure 42 The engaging member 341 includes two generally arc-shaped first elastic arms 3411, which are disposed opposite to each other and form a second receiving space 340 for accommodating the protrusion 371. When the engaging member 341 and the engaging groove 312 are engaged, the two first elastic arms 3411 hold the engaging groove 312. See also Figure 41 and Figure 42 Each of the first elastic arms 3411 has a locking portion 34111 protruding toward the second receiving space 340, and each locking portion 34111 is, for example, an arc-shaped protrusion. The locking portion 34111 is adapted to be inserted into the locking groove 312 and engaged with the locking groove 312, thereby preventing the card-dispensing portion 327 from being pulled out of the insertion hole 3222.

[0253] Of course, the implementation of the engaging member 341 and the engaging groove 312 is not limited to the examples described above. For example, in some alternative embodiments, the engaging groove 312 may include at least one groove formed on the outer peripheral wall of the protrusion 371. The engaging member 341 may include at least one first elastic arm 3411, and the engaging portion 34111 on each first elastic arm 3411 is, for example, an engaging hook, and each engaging hook is adapted to be inserted into a corresponding groove. The number and structure of the first elastic arms 3411 and the engaging groove 312 can be set as needed.

[0254] See you again Figure 36 The first connecting seat 310 has a first mating surface 38, which is disposed on at least one of the body 3101 and the mounting seat 370. The second connecting seat 320 has a second mating surface 3220. When the first connecting seat 310 and the second connecting seat 320 are connected, the first mating surface 38 and the second mating surface 3220 abut against each other. A protrusion 371 protrudes relative to the first mating surface 38, and an insertion hole 3222 is located within the area defined by the second mating surface 3220.

[0255] exist Figure 36 In the illustrated embodiment, both the first mating surface 38 and the second mating surface 3220 are vertical surfaces (e.g., perpendicular to the horizontal plane), and the insertion / removal direction T of the card-attaching part 327 is, for example, parallel to the horizontal plane. The second connecting seats 320 at both ends of the handrail body 131 are located between the first connecting seats 310 of the left and right handrail bars 132 and 133. To facilitate the engagement of the first connecting seats 310 and the second connecting seats 320, the second connecting seat 320 is pivotally connected to the handrail body 200 via a pivot 325, the axis of which is perpendicular to the insertion / removal direction T.

[0256] The following is combined Figure 36 To illustrate the assembly and disassembly methods of the first connector 310 and the second connector 320.

[0257] When it is necessary to install the handrail body 131 onto the handrails 132 and 133, first rotate the second connecting seats 320 at both ends of the handrail body 131 toward each other, and then move both ends of the handrail body 131 between the left and right handrails 132 and 133. When the insertion hole 3222 is aligned with the protrusion 371, rotate the second connecting seats 320 at both ends of the handrail body 200 toward each other, and insert the protrusion 371 and the engaging groove 312 into the insertion hole 3222, thereby engaging the first elastic arm 3411 of the engaging member 341 with the engaging groove 312 on the protrusion 371.

[0258] When it is necessary to separate the handrail body 131 from each handrail bar 132, 133, release the engagement relationship between the engaging groove 312 and the first elastic arm 3411, rotate each second connecting seat 320 around the pivot 325 so that the protrusion 371 exits the insertion hole 3222, and then the handrail body 131 can be removed.

[0259] To prevent the handrail body 131 from rotating vertically relative to the individual handrail bars 132 and 133, see [reference needed]. Figure 38 , Figure 39 and Figure 41 In some embodiments, the mounting base 370 has an anti-rotation platform 372 that protrudes relative to the first mating surface 38. The anti-rotation platform 372 and the insertion hole 3222 can be fitted together in any non-circular shape, such that the anti-rotation platform 372 is fitted into the insertion hole 3222 in a non-rotatable manner, thereby engaging with the second connecting base 320 in a non-rotatable manner. For example, in some embodiments, the insertion hole 3222 is a U-shaped hole, and the anti-rotation platform 372 correspondingly has a U-shaped outer contour. In some alternative embodiments, the insertion hole 3222 can be a flat hole or a polygonal hole, and the shape of the anti-rotation platform 372 can be adapted to the shape of the insertion hole 3222. See also Figure 39In some embodiments, the protrusion 371 protrudes from the end face of the anti-rotation platform 372 and is located within the area defined by the end face of the anti-rotation platform 372. The protrusion 371 extends into the first receiving space 323 with a smaller structure, which is beneficial to the miniaturization of the structure of the engaging member 341.

[0260] In some embodiments, to facilitate the release of the engagement between the engaging member 341 and the engaging groove 312, the second connecting seat 320 may also be equipped with a release member 342 and a resilient reset member 345. More specifically, the release member 342 is operatively connected to the engaging member 341 and is used to push the first resilient arm 3411 to release it from the engaging groove 312. The resilient reset member 345 is used to drive the release member 342 to reset.

[0261] See Figure 41 and Figure 42 An exemplary embodiment of the release member 342 is shown. In some embodiments, the second connecting seat 320 is provided with a third mounting hole 3232, which is opposite to the second mounting hole 3231. The release member 341 has an operating portion 3423, a shoulder portion 3429, and at least one pushing portion 3421. After the release member 341 enters the first receiving space 323 through the second mounting hole 3231, the operating portion 3423 extends out from the third mounting hole 3232 and slides into the third mounting hole 3232. The shoulder portion 3429 abuts against the inner wall of the second connecting seat 320 to prevent the release member 341 from falling out of the third mounting hole 3232. The number of pushing portions 3421 is the same as the number of first elastic arms 3411, and each first elastic arm 3411 is provided with an abutment portion 3413, with each pushing portion 3421 abutting against the corresponding abutment portion 3413. In some embodiments, the pushing portion 3421 may be provided with a pushing ramp 3421a, and the abutting portion 3413 may be a column extending from the first elastic arm 3411. The pushing portion 3421 abuts against the abutting portion 3413 via the pushing ramp 3421a. When the releasing member 342 is moved by a releasing force, the pushing ramp 3421a pushes the first elastic arm 3411 to move away from the engaging groove 312, thereby disengaging the engaging portion 34111 from the engaging groove 312. Of course, in other embodiments, the pushing portion 3421 and the abutting portion 3413 may have other implementations and are not limited to the examples described above. For example, in some alternative embodiments, a ramp may be provided on the abutting portion 3413, and the pushing portion 3412 may be, for example, a protrusion that abuts against the ramp of the abutting portion 3413.

[0262] See Figure 43In some embodiments, at least one guide surface 3496 may be provided within the first receiving space 323, corresponding to at least one abutment portion 3413. The guide surface 3496 may be formed on the sidewall of the boss 3495. Each push portion 3421 is sandwiched between the corresponding guide surface 3496 and the abutment portion 3413, and each push portion 3421 has a sliding surface 3421c that slides with the corresponding guide surface 3496. The guide surface 3496 and the sliding surface 3421c are, for example, parallel to the direction of movement of the release member 342. When the pushing part 3421 pushes the abutting part 3413, the guide surface 3496 supports the pushing part 3421. This can prevent the pushing part 3421 from elastically deforming when it comes into contact with the abutting part 3413 and failing to push the abutting part 3413 normally, thus preventing the engaging part 34111 from smoothly disengaging from the engaging groove 312.

[0263] Figure 41 and Figure 42 An exemplary embodiment of the resilient reset member 345 is shown. In some embodiments, the resilient reset member 345 is, for example, a spring, and is mounted between the release member 342 and the support 349. See also Figure 41 In some embodiments, a limiting block 3493 may be provided on the support 349, and a positioning post 3494 may be provided on the limiting block 3493. One end of the elastic reset member 345 abuts against the limiting block 3493 and is fitted onto the positioning post 3494. The other end of the elastic reset member 345 extends into the inner wall of the release member 342. When the pressing force on the release member 342 is removed, the elastic reset member 345 can drive the release member 342 to reset, and the locking member 341 also resets accordingly. In some embodiments, the limiting block 3493 may be disposed between the second ends of the two first elastic arms 3411, making full use of the space between the second ends of the two first elastic arms 3411, which helps to make the support 349 structure more compact.

[0264] Fifth aspect

[0265] like Figure 44 and Figure 45 As shown, the fifth aspect of this utility model discloses a carrier, which can be a stroller, wheelchair, high chair, high chair, etc. In this embodiment, a children's carrier such as a stroller is specifically described. The carrier includes a frame 100, a seat assembly 200, and a height adjustment mechanism 800. The height adjustment mechanism 800 has a simple structure and is easy to operate.

[0266] Specifically, such as Figure 44 and Figure 45As shown, the frame 100 includes at least a push handle 120, a front foot support frame 160, a rear foot support frame 170, a front wheel assembly 181, and a rear wheel assembly 182. The front foot support frame 160 includes a first front foot support rod 161 and a second front foot support rod 162 located on the left and right sides. A foot pedal 190 (also called a footrest) is connected between the first front foot support rod 161 and the second front foot support rod 162. The rear foot support frame 170 includes a first rear foot support rod 171 and a second rear foot support rod 172 located on the left and right sides. The bottom ends of the first front foot support rod 161 and the second front foot support rod 162 are respectively connected to the front wheel assembly 181. The bottom ends of the first rear foot support rod 171 and the second rear foot support rod 172 are respectively connected to the rear wheel assembly 182.

[0267] Specifically, such as Figure 44 and Figure 45 As shown, the front foot support rods 161 and 162 are elongated structures. The top ends of the front foot support rods 161 and 162 are pivotally connected to the corresponding rear foot support rods 171 and 172, and the lower ends of the front foot support rods 161 and 162 are connected to the front wheel assembly 181. The foot pedal 200 is located between the two front foot support rods 161 and 162.

[0268] The height adjustment mechanism 800 includes a front foot support assembly 810 and a locking assembly 830. A foot pedal 190 is disposed between the two front foot support assemblies 810 and is height-adjustable relative to the front foot support assemblies 810. The locking assembly 830 is disposed between the front foot support assemblies 810 and the foot pedal 190 and is used to lock or unlock the height adjustment of the foot pedal 190 relative to the front foot support assemblies 810.

[0269] like Figure 44 and Figure 45 As shown, each forefoot support assembly 810 includes forefoot support rods 161 and 162 and a guide member 811. A locking assembly 830 is disposed between the two forefoot support rods 161 and 162 and the corresponding sides of the foot pedal 190 for unidirectional or bidirectional locking of the foot pedal 190 in the height direction. In the illustrated embodiment, the guide member 811 is an elongated structure with a length shorter than the forefoot support rods 161 and 162. The guide member 811 is fixed to the opposite inner side of the forefoot support rods 161 and 162, that is, fixed to the side opposite to the other forefoot support rod 161 and 162, and the extending direction of the guide member 811 is approximately the same as the extending direction of the forefoot support rods 161 and 162. At least one of the opposite front side and the opposite rear side of the guide member 811 is provided with a guide groove 8111 provided along the extending direction of the guide member 811. In this embodiment, guide grooves 8111 are provided on both the front and rear sides of the guide member 811.

[0270] In this embodiment, as Figures 45 to 46As shown, the foot pedal 190 is a one-piece molded structure, including a pedal body 191 and snap-fit ​​members 192. The pedal body 191 is generally in the shape of a long strip. There are two snap-fit ​​members 192, which are respectively connected to both ends of the pedal body 191 and are respectively set at an angle to the pedal body 191. In this embodiment, the angle between the two snap-fit ​​members 192 and the pedal body 191 is 90 degrees. Each snap-fit ​​member 192 includes a connecting part 1921 and a mating part 1922. Figure 47 There are two mating parts 1922, which are respectively connected to both sides of the connecting part 1921. The two ends of the pedal body 191 are respectively connected to the connecting parts 1921 on the opposite sides. The two mating parts 1922 of each snap-fit ​​member 192 can be inserted and engaged with the opposite guide groove 8111 and can slide along the guide groove 8111, thereby driving the foot pedal 190 to move in the height direction.

[0271] Specifically, such as Figure 45 and Figure 46 As shown, the locking component 830 is disposed between the front foot support component 810 and the foot pedal 190, and the locking component 830 can be switched between a locked state and an unlocked state. When the locking component 830 is in the locked state, the foot pedal 190 can be fixed at a certain height position relative to the front foot support component 810, and the foot pedal 190 can be operated to move along a first direction D1. When the locking component 830 is in the unlocked state, the foot pedal 190 can be operated to move along the first direction D1 or a second direction D2. The first direction D1 and the second direction D2 are opposite and both parallel to the height direction. In this embodiment, the direction upward along the guide groove 8111 is defined as the first direction D1, and the direction downward along the guide groove 8111 is defined as the second direction D2. Of course, in other embodiments, the direction can be reversed, i.e., the direction downward along the guide groove 8111 is defined as the first direction D1, and the direction upward along the guide groove 8111 is defined as the second direction D2.

[0272] Specifically, such as Figure 45 and Figure 46 As shown, the locking assembly 830 includes an operating member 831, two locking members 832, two linkage members 833, a first reset member 834, two second reset members 835, a plurality of first locking slots 836, a plurality of second locking slots 837, and a plurality of third locking slots 838. The operating member 831 is operably disposed approximately at the center of the foot pedal 190. The first reset member 834 is disposed between the operating member 831 and the foot pedal 190. The two linkage members 833 are respectively connected to both sides of the operating member 831. The two locking members 832 are respectively connected to the side of the two linkage members 833 away from the operating member 831. The two second reset members 835 are respectively disposed between the two locking members 832 and the foot pedal 190. The plurality of first locking slots 836 and the plurality of second locking slots 837 are respectively disposed on two guide members 811.

[0273] The structure of the height adjustment mechanism 800 is described below using the connection structure between the left-side forefoot support component 810, foot pedal 190, and locking component 830 as an example. The connection structure between the right-side forefoot support component 810, foot pedal 190, and locking component 830 is similar.

[0274] Furthermore, such as Figure 46 As shown, the inner side of the guide member 811, that is, the side of the guide member 811 opposite to another guide member 811, is provided with a plurality of first locking grooves 836, which are arranged along the height direction. Each of the first locking grooves 836 is a unidirectional locking groove used to restrict the foot pedal 190 from moving in the second direction D2. Specifically, the depth of each first locking groove 836 gradually decreases to zero along the first direction D1. Specifically, the top wall of each first locking groove 836 is a first pushing slope 8361, which gradually slopes towards the opposite guide member 811 along the first direction D1. The bottom wall of each first locking groove 836 is a limiting wall 8362, which is approximately perpendicular to the guide member 811, that is, approximately parallel to the horizontal plane, and is used to restrict the foot pedal 190 from moving in the second direction D2.

[0275] The inner side of the guide member 811, that is, the side of the guide member 811 opposite to another guide member 811, is also provided with at least one second locking groove 837. The second locking groove 837 is a bidirectional locking groove used to restrict the movement of the foot pedal 190 in the first direction D1 and the second direction D2. The two ends of the second locking groove 837 along the height direction have a first limiting sidewall 8371 and a second limiting sidewall 8372, respectively. At least one second locking groove 837 is located on the first direction D1 of the plurality of first locking grooves 836. In this embodiment, the inner side of each guide member 811 is provided with two first locking grooves 836 and one second locking groove 837. The second locking groove 837 is located above the two first locking grooves 836 to restrict the movement of the foot pedal 190 in the first direction D1, that is, upward movement. In other words, the second locking groove 837 has a limiting function to prevent the foot pedal 190 from moving excessively upward. Of course, in other embodiments, the number of first locking slots 836 and second locking slots 837 can be adjusted as needed, or multiple first locking slots 836 can be provided without providing second locking slots 837.

[0276] like Figure 45 and Figure 48As shown, a third locking groove 838 is provided on the inner side of the guide member 811, that is, on the side of the guide member 811 opposite to another guide member 811. The third locking groove 838 is located in the second direction of the plurality of first locking grooves 836, that is, below the plurality of first locking grooves 836. The third locking groove 838 has a second pushing slope 8381, which gradually slopes towards the guide member 811 on the opposite side along the first or second direction. The third locking groove 838 also has a mounting opening 8382 opposite to the second pushing slope 8381. When the locking member 832 is in the locked state, the locking member 832 extends at least partially beyond the foot pedal 190 (e.g., Figure 46 (As shown). When the foot pedal 190 is installed on the front foot support assembly 810, the locking member 832 is inserted into the third locking groove 838 through the mounting port 8382, which makes it easy to install the foot pedal 190 on the front foot support assembly 810.

[0277] Furthermore, such as Figure 45 and Figure 48 As shown, the height adjustment mechanism 800 may further include a limiting member 850, which is generally elongated tubular in shape. The two ends of the limiting member 850 are respectively fixed to the inner sides of the two front foot supports 161 and 162. The limiting member 850 is located in the second direction of the third locking groove 838, that is, below the third locking groove 838. When the locking member 832 is inserted into the third locking groove 838, the foot pedal 190 abuts against the limiting member 850 to restrict the foot pedal 190 from moving in the second direction.

[0278] In this embodiment, as Figure 45 and Figure 48 As shown, the front foot support rod 161 or 162 includes a support rod body 163 and a wheel seat connection portion 164. The two ends of the limiting member 850 are respectively fixed to the wheel seat connection portions 164 of the two front foot support rods. During the installation of the vehicle, the locking member 832, which at least partially extends from both sides of the foot pedal 190, can first be inserted into the third locking groove 838 through the mounting port 8382 to install the foot pedal 190 between the two support rod bodies 163. Then, the two wheel seat connection portions 164 connected to the limiting member 850 are respectively installed at the lower ends of the two support rod bodies 163, so that the limiting member 850 is located below the third locking groove 838. Thus, when the locking member 832 is inserted into the third locking groove 838, the foot pedal 190 can abut against the limiting member 850 to restrict the foot pedal 190 from moving in the second direction.

[0279] Furthermore, such as Figure 46 and Figure 47As shown, the foot pedal 190 has a hollow inner cavity 193, in which both a locking member 832 and a linkage member 833 are movably disposed. The locking member 832 is generally pin-shaped. The linkage member 833 is generally rod-shaped and has a first end 8331 and a second end 8332. One end of the locking member 832 can extend out of the hollow inner cavity 193 to engage with a first locking groove 836 or a second locking groove 837, and the other end of the locking member 832 is fixedly connected to the second end 8332 of the linkage member 833. The first end 8331 of the linkage member 833 is connected to an operating member 831. The operating member 831 is operably disposed on the foot pedal 190, with at least a portion of the operating member 831 extending into the hollow inner cavity 193 and connected to the linkage member 833, while the other portion of the operating member 831 extends out of the hollow inner cavity 193 for operation.

[0280] Specifically, such as Figure 46 and Figure 47 As shown, the locking member 832 can be switched between a locked position and an unlocked position. When the locking member 832 is in the locked position, the locking member 832 can be inserted and engaged with any one of the plurality of first locking slots 836 or any one of the at least two second locking slots 837. When the locking member 832 is in the unlocked position, the locking member 832 can be released from engagement with the plurality of first locking slots 836 or at least one second locking slot 837.

[0281] Furthermore, such as Figure 46 and Figure 47 As shown, the operating member 831 can be operated to drive the locking member 832 from the locked position to the unlocked position via the linkage member 833. The operating member 831 has two drive slots 8311. Specifically, the extending direction of each drive slot 8311 intersects the moving direction of the operating member 831 and the moving direction of the locking member 832, respectively. The first end 8331 of the linkage member 833 is inserted into the drive slot 8311 and can move along the drive slot 8311. In this embodiment, the first end 8331 of the linkage member 833 can be provided with a drive pin (not shown in the figure), which is inserted into the drive slot 8311 to move along the drive slot 8311. Figure 46As shown, the drive groove 8311 located on the left side of the operating member 831 is inclined along the D3 direction (i.e., the direction in which the operating member 831 can be pressed) towards the guide member 811 on the corresponding side. The end of the drive groove 8311 near the guide member 811 on the corresponding side is designated as the first groove end 83111, and the end of the drive groove 8311 away from the guide member 811 on the corresponding side is designated as the second groove end 83112. When the operating member 831 is pressed along the D3 direction, the first end 8331 of the linkage member 833 (or the drive pin at the first end 8331) moves from the first groove end 83111 of the drive groove 8311 to the second groove end 83112, thereby causing the linkage member 833 and the locking member 832 to move together towards the guide member 811 on the opposite side, thus switching the locking member 832 from the locked position to the unlocked position.

[0282] Furthermore, such as Figure 46 As shown, a first reset member 834 is disposed between the operating member 831 and the foot pedal 190. The first reset member 834 is used to bias the operating member 831 so that the operating member 831 moves in the direction of driving the locking member 832 to the locked position. In this embodiment, the first reset member 834 is a spring, which provides a reset elastic force for the operating member 831. Specifically, a first mounting post 194 is provided in the hollow inner cavity 193 of the foot pedal 190. The operating member 831 is provided with a mounting cavity 8312 that can communicate with the hollow inner cavity 193. A second mounting post 8313 is provided in the mounting cavity 8312 opposite to the first mounting post 194, and the first mounting post 194 is located in the D3 direction of the second mounting post 8313. The two ends of the first reset member 834 are respectively sleeved on the outside of the first mounting post 194 and the second mounting post 8313 to prevent the first reset member 834 from shifting.

[0283] Furthermore, such as Figure 46 and Figure 47 As shown, the second reset member 835 is disposed between the locking member 832 and the foot pedal 190. The second reset member 835 is used to bias the locking member 832 to move the locking member 832 to the locked position. In this embodiment, the second reset member 835 is a spring, which provides an elastic force to reset the locking member 832 to the locked position. Specifically, the portion of the hollow inner cavity 190 of the foot pedal 190 in which the locking member 832 is installed has a first boss 195. The locking member 832 is surrounded by a second boss 8321 opposite to the first boss 195, and the second boss 8321 is located on the side of the first boss 195 near the guide member 811. The second reset member 835 is sleeved on the outside of the locking member 832, and both ends of the second reset member 835 abut against the first boss 195 and the second boss 8321, respectively, to prevent the second reset member 835 from shifting.

[0284] In the above embodiment, the height adjustment process of the foot pedal 190 is as follows:

[0285] like Figure 46 and Figure 47 As shown, to increase the height of the foot pedal 190, assume the foot pedal 190 is in the position shown below. Figure 46 At the indicated height position, that is, when the locking member 832 on the foot pedal 190 is inserted into the first locking groove 836 at the highest position, the foot pedal 190 can be pushed directly in the first direction D1. This causes the locking member 832 on the foot pedal 190 to gradually move away from the guide member 811 in the direction of the corresponding side under the action of the first pushing inclined surface 8361 in the first locking groove 836 (or under the action of the second pushing inclined surface 8381 if the locking member 832 is inserted in the third locking groove 838). Figure 46 Taking the locking member 832 on the left as an example (i.e., moving in the D4 direction), the second reset member 835 is gradually compressed. When the locking member 832 moves to the uppermost end of the first pushing slope 8361, that is, when the locking member 832 has moved out of the first locking groove 836, the locking member 832 is in the unlocked position. At this time, as the foot pedal 190 is continued to be pushed in the first direction D1, the locking member 832 continues to maintain the unlocked position under the pushing action of the guide member 811. When the locking member 832 moves with the foot pedal 190 to be opposite the second locking groove 837, the locking member 832, having lost the pushing action of the guide member 811, is reset to the locked position under the action of the second reset member 835 and inserted into the second locking groove 837. In this way, the foot pedal 190 is fixed at a higher position. It should be understood that, since the second locking groove 837 is a bidirectional locking groove, even if the foot pedal 190 at this height position is pushed further in the first direction D1, it cannot continue to move in the first direction D1 due to the restriction of the first limiting sidewall 371. However, if the locking member 832 is inserted into any of the first locking grooves 836 at this time, the foot pedal 190 can still be pushed further in the first direction D1 and continue to move in the first direction D1. At the same time, during the above process, when the locking member 832 moves from the locked position to the unlocked position along the first pushing inclined surface 8361, since the locking member 832 is fixedly connected to the linkage member 833, the linkage member 833 will also move in the D4 direction under the drive of the locking member 832 (with... Figure 46 Taking the linkage 833 on the left as an example), the operating member 831 is moved in the direction of D3 by the second end 8332 (or the locking pin at the second end 8332), and the first reset member 834 is compressed.

[0286] like Figure 46 and Figure 47 As shown, to lower the height of the foot pedal 190, assuming the foot pedal 190 is in the position shown... Figure 46At the indicated height position, i.e., when the locking member 832 on the foot pedal 190 is inserted into the highest locking groove 836, the operating member 831 needs to be pressed in the D3 direction. This causes the first end 8331 of the linkage member 833 (or the locking pin at the first end 8331) to move along the drive groove 8311 from the first groove end 83111 to the second groove end 83112, causing the linkage member 833 to move in the D4 direction (to... Figure 46 Taking the linkage 833 on the left as an example), it simultaneously drives the locking component 832 to move in the D4 direction (taking... Figure 46 Taking the locking member 832 on the left as an example, the locking member 832 is moved away from the guide member 811 on the corresponding side. When the locking member 832 moves from the locked position to the unlocked position, the locking member 832 disengages from the first locking groove 836 at the highest position. At this time, the foot pedal 190 can be pulled in the second direction D2, so that the foot pedal 190 moves downward. When the foot pedal 190 moves to be opposite any other first locking groove 836, the operating member 831 can be released. The operating member 831 is reset by the action of the first reset member 834, and at the same time, it drives the linkage member 833 to move in the opposite direction of the D4 direction (to...). Figure 46 (Taking the linkage 833 on the left as an example). The locking member 832, driven by the linkage 833 and the elastic force of the second reset member 835, returns from the unlocked position to the locked position, allowing the locking member 832 to be re-inserted into any other first locking slot 836. Thus, the foot pedal 190 is fixed at a lower height.

[0287] like Figures 49 to 51 As shown, another embodiment of the present invention also proposes a different height adjustment mechanism 800, which includes a front foot support assembly 810, a foot pedal 190, a locking assembly 830, and a latching member 860. The structures of the front foot support assembly 810 and the locking assembly 830 are the same as in the first embodiment. The only difference is that in this embodiment, the foot pedal 190 and the latching member 860 are two independent components, while in the previous embodiment, the foot pedal 190 includes a pedal body 191 and a latching member 192, which are integrally formed.

[0288] like Figure 50 and Figure 51 As shown, there are two snap-fit ​​connectors 860, which are respectively connected to both sides of the foot pedal 190. The following description uses the structure of one side of the foot pedal 190 as an example to specifically describe the snap-fit ​​connector 860 and the foot pedal 190:

[0289] The snap-fit ​​component 860 includes a snap-fit ​​body 861 and a connecting portion 862 that are interconnected and arranged at an angle. The snap-fit ​​body 861 is at least partially inserted into the guide groove 8111 and can slide along the guide groove 8111. Specifically, the snap-fit ​​body 861 has two oppositely arranged mating portions 8612 on its side facing away from the connecting portion 862. The snap-fit ​​component 860 can engage with the guide groove 8111 on the guide component 811 through these two mating portions 8612 and can slide along the guide groove 8111. The snap-fit ​​body 861 has a through hole 8611. One end of the foot pedal 190 has a notch 196. When the locking component 832 is in the locked position, the locking component 832 can extend out of the hollow inner cavity 193 from the notch 196. The connecting part 862 can be inserted into the recess 196 to realize the connection between the snap-fit ​​member 860 and the foot pedal 190. At the same time, when the locking member 832 is in the locked position, the locking member 832 can extend out of the hollow inner cavity 193 from the recess 196 and be inserted into any of the first locking groove 836 or the second locking groove 837 through the through hole 9611.

[0290] Of course, in other embodiments not shown, the guide member 811 may also be omitted, and the guide groove 8111 may be directly provided on the front foot support rods 161 and 162. The snap-fit ​​member 860 directly engages with the guide groove 8111 of the front foot support rods 161 and 162 through these two mating parts 8612.

[0291] In this embodiment, the snap-fit ​​connector 860 is retractably or movably connected to the foot pedal 190. For example... Figure 49 and Figure 51 As shown, since the connecting part 862 has a certain length in the horizontal direction, when the two connecting parts 862 are respectively inserted into the notches 196 at both ends of the foot pedal 190, the foot pedal 190 can move towards or away from the front foot support assembly 810 or the locking body 861 on either side, that is, the foot pedal 190 can move within a certain range in the horizontal direction. This configuration effectively adjusts the width of the foot pedal area (here, the foot pedal area refers to the sum of the horizontal dimension of the foot pedal 190 and the horizontal dimension of the connecting part 862 protruding from the foot pedal 190) by inserting the connecting part 862 into the foot pedal 190 at different depths. This solves the problem of inconsistent foot pedal height adjustment caused by the different widths between the two guide members 811 on different vehicles due to machining tolerances of the two front foot support components 810. Furthermore, when the front foot support component 810 is tilted (i.e., the front foot support rods 161, 162 or the guide member 811 are tilted), the upper included angle α between the front foot support rods 161, 162 and the foot pedal 190 (e.g., ...) Figure 49 When the angle is less than 90 degrees, it can solve the problem of the foot pedal 190 not sliding smoothly due to the different bottom and top distances of the two sets of front foot support rods 161 and 162 of the vehicle.

[0292] The aforementioned height adjustment mechanism 20 and vehicle have at least the following beneficial effects:

[0293] In the aforementioned height adjustment mechanism 20 for a vehicle, a locking component 830 is provided between the front foot support assembly 810 and the foot pedal 190. When the locking component 830 is locked, the foot pedal 190 can be fixed at a certain height relative to the front foot support assembly 810. When the foot pedal 190 is operated, it can move along a first direction D1 parallel to the height direction. When the locking component 830 is unlocked, the foot pedal 190 can move either along the first direction D1 or along a second direction D2 opposite to the first direction D1. In other words, the locking component 830 can unidirectionally lock the foot pedal 190 in the height direction, so that the user only needs to release the locking component 830 when moving the foot pedal 190 in the second direction D2, and does not need to release it when moving it in the first direction D1. This height adjustment mechanism 20 has a simple structure and is easy to operate.

[0294] In another embodiment of this utility model, the height adjustment mechanism 20 can adjust the height and width of the foot pedal 190 simultaneously with the snap-fit ​​component 400 when there are machining tolerances in the two front foot support components 810 or when the two front foot support rods 161 and 162 are tilted, so as to accommodate children of different ages or solve the problem of the foot pedal 190 being difficult to adjust.

[0295] The technical features of the embodiments of the above aspects can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the embodiments of the above aspects are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0296] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A handrail mounting unit, characterized in that, include: The first connector is equipped with a card dispensing section; A first magnetic attractor is disposed on the first connector; The second connector is equipped with a locking mechanism; A second magnetic element is disposed on the second connector. The first connector and the second connector are detachably connected by the detachable engagement of the card fitting part and the engaging member, and by the magnetic attraction of the first magnetic member and the second magnetic member.

2. The handrail mounting unit according to claim 1, characterized in that, The second connector has a first receiving space and an insertion hole communicating with the first receiving space, and the engaging member includes at least one first elastic arm located in the first receiving space; The card-dispensing part is adapted to enter or exit the first receiving space through the insertion hole; The card-dispensing part is provided with at least one engaging slot, which is used to detachably engage with the at least one first elastic arm.

3. The handrail mounting unit according to claim 2, characterized in that, The card fitting portion includes a protrusion, and at least one engaging groove is disposed on the protrusion. The protrusion is adapted to extend into the second connecting seat to allow the at least one engaging groove to engage with the at least one first resilient arm.

4. The handrail mounting unit according to claim 3, characterized in that, The first connecting seat is provided with an anti-rotation platform, which is non-rotatably fitted into the insertion hole; The protrusion is disposed on the anti-rotation platform, the first connecting seat has a first receiving cavity, the first receiving cavity is located in the protrusion, and the first magnetic suction member is installed in the first receiving cavity.

5. The handrail mounting unit according to claim 3, characterized in that, The at least one engaging groove includes an annular groove disposed on the outer peripheral wall of the protrusion; The engaging member includes two first elastic arms, which are arranged opposite each other to form a second receiving space for accommodating the protrusion. When the protrusion is located in the second receiving space, the two first elastic arms hold the annular groove.

6. The handrail mounting unit according to claim 5, characterized in that, A support is provided in the first accommodating space of the second connecting seat. The first ends of the two first elastic arms are connected by a fixing part, which is fixed to the support. The second ends of the two first elastic arms are opposite to each other and spaced apart. The support is provided with a spacer, which is close to the first ends of the two first elastic arms and located between them. The spacer is adapted to abut against the two first elastic arms.

7. The handrail mounting unit according to claim 6, characterized in that, The fixing part is connected to the support through a mounting column; The fixing part has a hole, the mounting post is disposed on the support, and the mounting post passes through the hole.

8. The handrail mounting unit according to claim 7, characterized in that, The spacer is spaced apart from the mounting column; When the card-dispensing part is not inside the first receiving space, the two first elastic arms abut against the spacer located between them.

9. The handrail mounting unit according to claim 2, characterized in that, The second magnetic suction member and the locking member are installed in the first receiving space.

10. The handrail mounting unit according to claim 9, characterized in that, The second connector is provided with a second mounting hole, which communicates with the first accommodating space; The second magnetic suction member and the locking member are mounted on the support, and the support is inserted into the first receiving space through the second mounting hole and fixed to the second connecting seat.

11. The handrail mounting unit according to claim 10, characterized in that, The second mounting hole and the insertion hole are located on two generally perpendicular or intersecting surfaces of the second connector.

12. The handrail mounting unit according to claim 10, characterized in that, The support is provided with a boss that protrudes toward the insertion hole; The boss has a second receiving cavity, and the second magnetic member is received in the second receiving cavity.

13. The handrail mounting unit according to claim 2, characterized in that, The at least one first elastic arm has at least one engaging portion protruding into the at least one engaging groove, the engaging portion and the engaging groove being detachably engaged.

14. The handrail mounting unit according to claim 2, characterized in that, The second connecting seat is also equipped with a release element and a resilient reset element. The release element is operably connected to the at least one first resilient arm and is used to push the at least one first resilient arm to disengage from the at least one engaging groove. The resilient reset element is used to drive the release element to reset.

15. The handrail mounting unit according to claim 14, characterized in that, The unlocking member has at least one pushing portion, and the at least one first elastic arm has at least one abutting portion. Each of the pushing portions is adapted to push against the corresponding abutting portion to disengage the at least one first elastic arm from the at least one engaging groove.

16. The handrail mounting unit according to claim 15, characterized in that, The pushing part is provided with a pushing inclined surface, and the pushing part abuts against the abutting part through the pushing inclined surface. The abutting part is a column extending from the first elastic arm.

17. The handrail mounting unit according to claim 15, characterized in that, A boss is provided in the first accommodating space. The boss has a guide surface opposite to the abutting part. The pushing part is sandwiched between the guide surface and the abutting part, and the pushing part has a sliding surface that slides with the guide surface.

18. The handrail mounting unit according to claim 14, characterized in that, A support is provided within the first accommodating space of the second connecting seat; The elastic reset element is installed between the release element and the support; When the pressing force on the release member is removed, the elastic reset member drives the release member to reset.

19. The handrail mounting unit according to claim 18, characterized in that, The support is provided with a limit block, and the limit block is provided with a positioning post; One end of the elastic reset member abuts against the limiting block and is fitted onto the positioning post; The other end of the elastic reset member extends into the inner wall of the release member.

20. The handrail mounting unit according to claim 19, characterized in that, The engaging component includes two first elastic arms, the first ends of the two first elastic arms are connected by a fixing part, and the fixing part is fixed to the support. The limiting block is disposed between the second ends of the two first elastic arms.

21. The handrail mounting unit according to claim 14, characterized in that, The second connector is provided with a third mounting hole; The unlocking member has an operating part. After the unlocking member enters the first receiving space through the third mounting hole, the operating part extends out from the third mounting hole and slides into the third mounting hole.

22. The handrail mounting unit according to claim 21, characterized in that, The release member has a shoulder that abuts against the inner wall of the second connecting seat to prevent the release member from falling out of the third mounting hole.

23. The handrail mounting unit according to claim 1, characterized in that, The first connector includes a connector body and a mounting base; The connecting body is connected to the handrail; The mounting base is installed on the connecting body by a fastening mechanism, or the mounting base and the connecting body are integrally formed. The card distribution unit is disposed on the mounting base.

24. The handrail mounting unit according to claim 23, characterized in that, The outer surface of the connecting body is provided with a snap hole and a first mounting hole; The mounting base is provided with a second elastic arm and a connecting hole at opposite ends, and the second elastic arm is used to engage with the locking hole; The fastening mechanism includes a fastener that passes through the connection hole and connects to the first mounting hole.

25. The handrail mounting unit according to claim 24, characterized in that, The outer surface of the connecting body has a positioning groove, and the mounting base is non-rotatably mounted in the positioning groove.

26. The handrail mounting unit according to claim 25, characterized in that, The positioning groove is a U-shaped groove, and has a limiting bottom and an opening opposite to the limiting bottom; The card hole is located near the bottom of the limiting position, and the first mounting hole is located near the opening. The first end of the mounting base abuts against the bottom of the limiting position, and the second elastic arm extends outward from the first end of the mounting base to engage with the locking hole; The second end of the mounting base is close to the opening and has the connection hole.

27. The handrail mounting unit according to claim 26, characterized in that, The card-dispensing part is disposed between the second elastic arm and the connecting hole.

28. The handrail mounting unit according to claim 24, characterized in that, The connecting body is provided with a countersunk platform corresponding to the position of the first mounting hole, and the mounting base is provided with a boss corresponding to the position of the connecting hole; or the connecting body is provided with a boss corresponding to the position of the first mounting hole, and the mounting base is provided with a countersunk platform corresponding to the position of the connecting hole. While the boss and the countersunk platform cooperate with each other, the connecting hole and the first mounting hole are aligned with each other.

29. The handrail mounting unit according to claim 23, characterized in that, The card fitting part includes at least one engaging groove, and the engaging member has at least one engaging portion protruding into the at least one engaging groove, the engaging portion and the engaging groove being detachably engaged.

30. The handrail mounting unit according to claim 29, characterized in that, The card-dispensing part includes a protrusion, and the engaging groove is disposed on the protrusion; The engaging component includes at least one first elastic arm located within the second connecting seat, and the first elastic arm is provided with the engaging portion. The protrusion of the card fitting part is adapted to extend into the second connecting seat, and the engaging groove enters the second connecting seat along with the protrusion to engage with the engaging part of the first elastic arm, so that the second connecting seat and the first connecting seat are connected.

31. The handrail mounting unit according to claim 3, characterized in that, The first connecting seat has a first mating surface, and the second connecting seat has a second mating surface. When the first connecting seat and the second connecting seat are connected, the first mating surface and the second mating surface abut against each other. The protrusion protrudes relative to the first mating surface; The insertion hole is located within the area defined by the second mating surface.

32. The handrail mounting unit according to claim 31, characterized in that, The first connecting seat is provided with an anti-rotation platform, which protrudes relative to the first mating surface; The anti-rotation platform is non-rotatably fitted into the insertion hole.

33. The handrail mounting unit according to claim 32, characterized in that, The protrusion protrudes from the end face of the anti-rotation platform and is located within the area defined by the end face of the anti-rotation platform.

34. The handrail mounting unit according to claim 1, characterized in that, The second connecting seat is pivotally connected to the armrest body via a pivot, the axis of which is perpendicular to the insertion and removal direction of the card fitting.

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