Stroller frame and unlocking mechanism thereof

Abstract

The invention relates to a stroller frame and an unlocking mechanism thereof, the unlocking mechanism comprises a first unlocking piece which is rotatably arranged on the stroller frame, and the first unlocking piece is in driving connection with a folding locking mechanism so as to allow a lower stroller hand frame to pivot relative to a wheel carrier; the second unlocking piece is rotatably arranged on the stroller frame, and the second unlocking piece is in driving connection with the height adjustment locking mechanism so as to allow the upper stroller hand frame to move relative to the lower stroller hand frame; and the operating part is movably arranged on the stroller frame and is suitable for driving any one of the first unlocking part and the second unlocking part to rotate. Therefore, a user can control the first unlocking piece to rotate by driving the operating piece, and then indirectly control the folding and locking mechanism; meanwhile, the second unlocking piece can be controlled to rotate by driving the operating piece, and then the height adjusting and locking mechanism is indirectly controlled. Due to the fact that the user only needs to operate the unlocking mechanism to control the different locking mechanisms, the operation convenience of the user is improved.

Description

Technical Field

[0001] This application relates to the technical field of baby products, and particularly to a stroller frame and its unlocking mechanism. Background Art

[0002] For families with infants and young children, it has become very common and convenient to use baby strollers as auxiliary care tools when going out.

[0003] In order to meet the user's requirements for the practicality and convenience of baby strollers, a folding and locking mechanism is usually provided on the frame of the baby stroller, and the user can use this mechanism to keep the baby stroller in the unfolded state or the folded state. In addition, in order to improve the applicability of the baby stroller, a height adjustment and locking mechanism is also provided on the handlebar frame of the baby stroller, and the user can use this mechanism to adjust the height of the handlebar frame to meet the gripping requirements of different users. Currently, the common folding and locking mechanism and height adjustment and locking mechanism of baby strollers are two independent mechanisms, and when adjusting the state of the frame or the height of the handlebar frame, they are both achieved through two independent operating mechanisms. However, such a design is likely to cause inconvenience to users. Summary of the Invention

[0004] Based on this, it is necessary to provide a stroller frame and its unlocking mechanism for the above problems. The unlocking mechanism can unlock the folding and locking mechanism and the height adjustment and locking mechanism respectively.

[0005] The present invention provides an unlocking mechanism applicable to a stroller frame. The stroller frame includes an upper handlebar frame, a lower handlebar frame, a wheel frame, a height adjustment and locking mechanism, and a folding and locking mechanism. The upper handlebar frame and the lower handlebar frame are restricted or allowed to move relative to each other by the height adjustment and locking mechanism. The lower handlebar frame is pivotally connected to the wheel frame and is restricted or allowed to pivot relative to the wheel frame by the folding and locking mechanism. The unlocking mechanism includes: a first unlocking member rotatably provided on the stroller frame, the first unlocking member being drivingly connected to the folding and locking mechanism to allow the lower handlebar frame to pivot relative to the wheel frame; a second unlocking member rotatably provided on the stroller frame, the second unlocking member being drivingly connected to the height adjustment and locking mechanism to allow the upper handlebar frame to move relative to the lower handlebar frame; and an operating member movably provided on the stroller frame and adapted to drive either the first unlocking member or the second unlocking member to rotate.

[0006] In the above unlocking mechanism, since the first unlocking member is rotatably provided on the stroller frame and is drivingly connected to the folding and locking mechanism, the second unlocking member is rotatably provided on the stroller frame and is drivingly connected to the height adjustment locking mechanism, and the operating member is movable and used to drive the rotation of any one of the first unlocking member and the second unlocking member. Among them, the folding and locking mechanism can allow the lower stroller frame to pivot relative to the wheel frame, and the height adjustment locking mechanism can allow the upper stroller frame to slide relative to the lower stroller frame. Therefore, the user can control the rotation of the first unlocking member by driving the movement of the operating member, and indirectly control the folding and locking mechanism, so that the stroller frame can be switched between the unfolded state and the locked state. At the same time, the user can also control the rotation of the second unlocking member by driving the movement of the operating member, and indirectly control the height adjustment locking mechanism, so that the height of the stroller frame is adjustable. It is precisely because the user only needs to operate the above unlocking mechanism to separately control different locking mechanisms, thus improving the operation convenience of the user.

[0007] In one embodiment, the unlocking mechanism further includes a safety lock, which is movably provided on the stroller frame and can be switched between a first position and a second position; when the safety lock is in the first position, the operating member is drivingly connected to the first unlocking member through the safety lock; when the safety lock is in the second position, the operating member is drivingly connected to the second unlocking member through the safety lock.

[0008] In one embodiment, the safety lock includes: a toggling member, which is movably provided on the stroller frame along a first direction and can be switched between the first position and the second position; a first linkage member, which is movably connected to the toggling member along a second direction and is drivingly connected to the first unlocking member; and a second linkage member, which is movably connected to the toggling member along the second direction and is drivingly connected to the second unlocking member; wherein, the first direction intersects with the second direction, and the operating member can move relative to the stroller frame along the second direction; when the toggling member is in the first position, the operating member can be operated to push the first linkage member to move and make the first unlocking member rotate; when the toggling member is in the second position, the operating member can be operated to push the second linkage member to move and make the second unlocking member rotate.

[0009] In one embodiment, the first linkage member has a first abutting portion, the second linkage member has a second abutting portion, and the operating member has a first driving portion and a second driving portion arranged at intervals; when the toggling member is in the first position, the first abutting portion is opposite to the first driving portion, and the second abutting portion is misaligned with the second driving portion; when the toggling member is in the second position, the second abutting portion is opposite to the second driving portion, and the first abutting portion is misaligned with the first driving portion.

[0010] In one embodiment, the operating member further has a third driving portion and a fourth driving portion, the third driving portion and the fourth driving portion are spaced apart and located between the first driving portion and the second driving portion; the first linking member and the second linking member are spaced apart and a third avoidance portion is formed therebetween, the first linking member further has a third abutment portion, and the second linking member further has a fourth abutment portion; when the toggle member is located at the first position, the third abutment portion is located opposite to the third driving portion, and the fourth driving portion is located opposite to the third avoidance portion; when the toggle member is located at the second position, the fourth abutment portion is located opposite to the fourth driving portion, and the third driving portion is located opposite to the third avoidance portion.

[0011] In one embodiment, a first avoidance portion is formed between the first abutting portion and the third abutting portion; a second avoidance portion is formed between the second abutting portion and the fourth abutting portion; when the toggle member is located at the first position and the operating member is operated, the second avoidance portion is used to avoid the second driving portion; when the toggle member is located at the second position and the operating member is operated, the first avoidance portion is used to avoid the first driving portion.

[0012] In one embodiment, one of the first linking member and the first releasing member has a first guide recess, and the other has a first matching protrusion, the first matching protrusion can be slidably disposed in the first guide recess, and the first guide recess extends along the first direction; one of the second linking member and the second releasing member has a second guide recess, and the other has a second matching protrusion, the second matching protrusion can be slidably disposed in the second guide recess, and the second guide recess extends along the first direction.

[0013] In one embodiment, the release mechanism further includes a first elastic member, which abuts between the cart frame and the toggle member and is used to provide an elastic restoring force for the toggle member to keep the toggle member in the first position or the second position.

[0014] In one embodiment, the operating member has an initial position and a release position; when the operating member is located at the initial position, the operating member can be operated to move to push the first linking member or the second linking member to move; when the operating member is located at the release position, the operating member pushes the first linking member or the second linking member.

[0015] In one embodiment, the release mechanism further includes a second elastic member, which abuts between the cart frame and the operating member and is used to provide an elastic restoring force for the operating member to keep the operating member at the initial position.

[0016] In one embodiment, the operating member has an initial position and an unlocking position; one of the first unlocking member and the trolley frame is provided with a first stop recess, and the other is provided with a first stop protrusion. The first stop protrusion abuts against a side wall of the first stop recess when the operating member is switched to the initial position, and the first stop protrusion abuts against the other side wall corresponding to the first stop recess when the operating member is switched to the unlocking position; one of the second unlocking member and the trolley frame is provided with a second stop recess, and the other is provided with a second stop protrusion. The second stop protrusion abuts against a side wall of the second stop recess when the operating member is switched to the initial position, and the second stop protrusion abuts against the other side wall corresponding to the second stop recess when the operating member is switched to the unlocking position.

[0017] In one embodiment, the first unlocking member is provided with a first connecting portion, the first connecting portion is disposed offset from the rotation center of the first unlocking member, and the first connecting portion is used for connecting the folding locking mechanism; the second unlocking member is provided with a second connecting portion, the second connecting portion is disposed offset from the rotation center of the second unlocking member, and the second connecting portion is used for connecting the height adjustment locking mechanism.

[0018] The present invention further provides a trolley frame, including an upper handle frame, a lower handle frame, a wheel frame, a folding locking mechanism, a height adjustment locking mechanism, and the unlocking mechanism as described above. The upper handle frame and the lower handle frame limit or allow relative movement therebetween through the height adjustment locking mechanism. The lower handle frame is pivotally connected to the wheel frame and limits or allows relative pivoting therebetween through the folding locking mechanism. The unlocking mechanism is disposed on the handle frame or the wheel frame and is respectively drivingly connected to the folding locking mechanism and the height adjustment locking mechanism to allow the lower handle frame to pivot relative to the wheel frame and the upper handle frame to move relative to the lower handle frame.

[0019] In one embodiment, the folding locking mechanism includes a first locking member and a fixing member. The fixing member is provided with a locking recess and is mounted on one of the wheel frame or the lower handle frame. The first locking member is movably disposed on the other of the wheel frame or the lower handle frame and is operably connected to the first unlocking member; when the first locking member is inserted into the locking recess, the lower handle frame is restricted from pivoting relative to the wheel frame, and when the first locking member withdraws from the locking recess, the lower handle frame can pivot relative to the wheel frame.

[0020] In one embodiment, the folding and locking mechanism further includes a first traction member connected between the first unlocking member and the first locking member, and the first unlocking member drives the first locking member to retreat from the locking recess through the first traction member.

[0021] In one embodiment, the height adjustment locking mechanism includes a rider locking assembly and a locking hole. One of the upper rider frame and the lower rider frame is provided with the locking hole, and the other is provided with the rider locking assembly. The rider locking assembly can be engaged with the locking hole to lock the upper rider frame and the lower rider frame.

[0022] In one embodiment, the rider locking assembly is disposed on the upper rider frame. The rider locking assembly includes: a moving member movably disposed on the upper rider frame and operably connected to the second unlocking member. The moving member is provided with a guiding groove that extends obliquely with respect to the moving direction of the moving member; and a second locking member having a guiding post that extends into the guiding groove and is slidably engaged with the guiding groove to be able to extend into or retreat from the locking hole.

[0023] In one embodiment, the height adjustment locking mechanism further includes a second traction member connected between the second unlocking member and the moving member. The second unlocking member drives the moving member to move through the second traction member to drive the second locking member to retreat from the locking hole.

[0024] In one embodiment, a plurality of the locking holes are provided, and the plurality of locking holes are spaced along the sliding direction of the upper rider frame relative to the lower rider frame.

[0025] The present application provides an unlocking mechanism applicable to a stroller frame. The stroller frame includes a rider frame, a wheel frame, a reversing locking mechanism, and a folding and locking mechanism. The rider frame is rotatably disposed on the wheel frame. The reversing locking mechanism and the folding and locking mechanism are both disposed between the rider frame and the wheel frame. The rider frame can be restricted or allowed to rotate relative to the wheel frame for reversing by the reversing locking mechanism, and the rider frame can also be restricted or allowed to rotate relative to the wheel frame for folding by the folding and locking mechanism. The unlocking mechanism includes: a first unlocking member rotatably disposed on the stroller frame and drivingly connected to the reversing locking mechanism to allow the rider frame to rotate relative to the wheel frame for reversing; a second unlocking member rotatably disposed on the stroller frame and drivingly connected to the folding and locking mechanism to allow the rider frame to rotate relative to the wheel frame for folding; and an operating member movably disposed on the stroller frame and selectively driving the first unlocking member or the second unlocking member to rotate.

[0026] In one embodiment, the unlocking mechanism further includes a safety lock movably disposed on the cart frame and switchable between a first position and a second position; when the safety lock is in the first position, the operating member is drivingly connected to the first unlocking member through the safety lock; when the safety lock is in the second position, the operating member is drivingly connected to the second unlocking member through the safety lock.

[0027] In one embodiment, the safety lock includes: a first linkage drivingly connected to the first unlocking member; a second linkage drivingly connected to the second unlocking member; and a toggling member connected to the first linkage and the second linkage respectively, the toggling member being movably disposed on the cart frame and switchable between the first position and the second position to drive the first linkage and the second linkage to move in a third direction; wherein, when the toggling member is in the first position, the operating member is operated to push the first linkage to move in a fourth direction to rotate the first unlocking member; when the toggling member is in the second position, the operating member is operated to push the second linkage to move in the fourth direction to rotate the second unlocking member, and the third direction intersects the fourth direction.

[0028] In one embodiment, a first connecting portion is provided on the first unlocking member, the first connecting portion is disposed offset from the rotation center of the first unlocking member, and the first connecting portion is used for connecting the reversing locking mechanism; a second connecting portion is provided on the second unlocking member, the second connecting portion is disposed offset from the rotation center of the second unlocking member, and the second connecting portion is used for connecting the folding locking mechanism.

[0029] The present application further provides a cart frame having an unfolded state and a folded state, including: a wheel frame; a handle frame rotatably disposed on the wheel frame; a reversing locking mechanism disposed between the handle frame and the wheel frame, the handle frame being able to be restricted or allowed to rotate relative to the wheel frame by the reversing locking mechanism for reversing; a folding locking mechanism disposed between the handle frame and the wheel frame, the handle frame being able to be restricted or allowed to rotate relative to the wheel frame by the folding locking mechanism for folding; and the unlocking mechanism as described above disposed on the handle frame and drivingly connected to the folding locking mechanism and the unlocking mechanism respectively to allow the handle frame to rotate relative to the wheel frame for reversing or folding.

[0030] In one embodiment, the rider frame is pivotally connected to the wheel frame at a first pivot point, such that the rider frame has a first use position and a second use position relative to the wheel frame; the commutation locking mechanism includes a first locking member, a first engaging member, and a second engaging member. The first engaging member and the second engaging member are circumferentially spaced apart around the first pivot point on the wheel frame, and the first locking member is disposed on the rider frame and adapted to engage with the first engaging member or the second engaging member; when the first locking member engages with the first engaging member, the rider frame is in the first use position, and when the first locking member engages with the second engaging member, the rider frame is in the second use position.

[0031] In one embodiment, when the rider frame is in the first use position, the top of the rider frame is located on the first side of the wheel frame; when the rider frame is in the second use position, the top of the rider frame is located on the second side of the wheel frame; wherein, the first side and the second side are oppositely arranged relative to the traveling direction of the stroller frame.

[0032] In one embodiment, the first locking member has a locking portion, and both the first engaging member and the second engaging member are provided with a locking portion adapted to engage with the locking portion; the first locking member is movably disposed on the rider frame and has a first locking position and a first unlocking position. When in the first locking position, the locking portion engages with the locking portion to restrict the rider frame from switching between the first use position and the second use position; when in the first unlocking position, the locking portion disengages from the locking portion to allow the rider frame to switch between the first use position and the second use position.

[0033] In one embodiment, the commutation locking mechanism further includes: a first driving member movably disposed on the rider frame and connected to the first locking member; and a first traction member respectively connected to the first driving member and the first unlocking member; when the first unlocking member rotates, the first unlocking member drives the first driving member to move through the first traction member, so as to drive the first locking member to move from the first locking position to the first unlocking position.

[0034] In one embodiment, the rider frame is pivotally connected to the wheel frame at a first pivot point, such that the rider frame has a first use position and a third use position relative to the wheel frame; when the rider frame is in the first use position, the rider frame and the wheel frame are away from each other around the first pivot point, so that the stroller frame is in the unfolded state, and when the rider frame is in the third use position, the rider frame and the wheel frame are close to each other around the first pivot point, so that the stroller frame is in the folded state.

[0035] In one embodiment, the folding and locking mechanism includes: a second locking member that is movable relative to the pushcart frame and has a second locking position and a second unlocking position; the wheel frame includes a rear wheel frame and a first transmission member, one end of the first transmission member is pivotally connected to the rear wheel frame, and the other end is pivotally connected to the pushcart frame at the first pivot point; when the second locking member is in the second locking position, the second locking member engages with the first transmission member to limit the pivoting of the pushcart frame relative to the first transmission member, thereby restricting the switching of the pushcart frame between the first use position and the third use position; when the second locking member is in the second unlocking position, the second locking member disengages from the first transmission member to allow the pushcart frame to pivot relative to the first transmission member, thereby allowing the pushcart frame to switch between the first use position and the third use position.

[0036] In one embodiment, the first transmission member has a first recess and a second recess. When the pushcart frame is in the unfolded state, the second locking member engages with the first recess; when the pushcart frame is in the folded state, the second locking member engages with the second recess.

[0037] In one embodiment, the folding and locking mechanism further includes: a second driving assembly movably disposed on the pushcart frame and drivingly cooperating with the second locking member; and a second traction member respectively connected to the second driving assembly and the second unlocking member; when the second unlocking member rotates, the second unlocking member drives the second driving assembly to move through the second traction member to drive the second locking member to move from the second locking position to the second unlocking position.

[0038] The present application provides an unlocking mechanism applicable to a pushcart frame. The pushcart frame includes a pushcart frame body, a wheel frame, a wheel seat, and a wheel locking mechanism. The pushcart frame body includes an upper pushcart frame body, a lower pushcart frame body, and a height adjustment locking mechanism disposed therebetween. The upper pushcart frame body and the lower pushcart frame body restrict or allow relative movement therebetween through the height adjustment locking mechanism; the wheel seat is rotatably connected to the wheel frame, and the wheel locking mechanism is disposed between the wheel frame and the wheel seat and is used to restrict or allow the wheel seat to rotate relative to the wheel frame. The unlocking mechanism includes: a first unlocking member rotatably disposed on the pushcart frame and drivingly connected to the wheel locking mechanism to allow the wheel seat to rotate relative to the wheel frame; a second unlocking member rotatably disposed on the pushcart frame and drivingly connected to the height adjustment locking mechanism to allow the upper pushcart frame body to move relative to the lower pushcart frame body; and an operating member movably disposed on the pushcart frame and selectively driving the first unlocking member or the second unlocking member to rotate.

[0039] In one embodiment, a first connection portion is provided on the first unlocking member, and the first connection portion is disposed offset from the rotation center of the first unlocking member. The first connection portion is used to connect the wheel locking mechanism. A second connection portion is provided on the second unlocking member, and the second connection portion is disposed offset from the rotation center of the second unlocking member. The second connection portion is used to connect the height adjustment locking mechanism.

[0040] The present application further provides a stroller frame, including: a handle frame, a wheel frame, a wheel seat, a wheel locking mechanism, and the unlocking mechanism as described above. The handle frame includes an upper handle frame, a lower handle frame, and a height adjustment locking mechanism disposed therebetween. The upper handle frame and the lower handle frame are restricted or allowed to move relative to each other by the height adjustment locking mechanism. The wheel seat is rotatably connected to the wheel frame. The wheel locking mechanism is disposed between the wheel frame and the wheel seat and is used to restrict or allow the wheel seat to rotate relative to the wheel frame. The unlocking mechanism is disposed on the handle frame and is respectively drivingly connected to the wheel locking mechanism and the height adjustment mechanism to allow the wheel seat to rotate relative to the wheel frame and the upper handle frame to move relative to the lower handle frame.

[0041] In one embodiment, the wheel locking mechanism includes: a first locking recess disposed on the wheel seat; a first locking member movably disposed on the wheel frame and adapted to be locked and engaged with the first locking recess; and a first pulling member connected between the first unlocking member and the first locking member. When the first locking member extends into the first locking recess for locking engagement, the wheel seat is restricted from rotating relative to the wheel frame. When the first unlocking member drives the first locking member to withdraw from the first locking recess through the first pulling member to release the engagement, the wheel seat is allowed to rotate relative to the wheel frame.

[0042] In one embodiment, the first pulling member is configured to be disposed within the handle frame and the wheel frame and pass through the height adjustment locking mechanism.

[0043] In one embodiment, the height adjustment locking mechanism includes a support seat. The support seat is provided with a first through-channel, and the first through-channel is a U-shaped channel. One end of the first pulling member away from the first unlocking member extends into the U-shaped channel from one port of the U-shaped channel and extends out from the other port of the U-shaped channel, so that the first pulling member is disposed around the support seat.

[0044] In one embodiment, the upper handlebar frame is slidable relative to the lower handlebar frame. The height adjustment locking mechanism includes: a second locking portion provided on the lower handlebar frame; a second locking assembly movably provided on the upper handlebar frame and adapted to be locked and engaged with the second locking portion; and a second traction member connected between the second unlocking member and the second locking assembly. When the second locking assembly extends into the second locking portion for locking engagement, the upper handlebar frame is restricted from sliding relative to the lower handlebar frame. When the second unlocking member drives the second locking assembly to retreat from the second locking portion through the second traction member to release the engagement, the upper handlebar frame is allowed to slide relative to the lower handlebar frame.

[0045] In one embodiment, the height adjustment locking mechanism further includes a support base provided with a first through channel and a second through channel. The first through channel is a U-shaped channel, and the second through channel is a linear channel. The second traction member is received in the linear channel. The wheel locking mechanism includes a first traction member configured to be disposed within the wheel frame and the handlebar frame and pass through the U-shaped channel.

[0046] In one embodiment, the height adjustment locking mechanism includes: a first connecting seat connected to the upper handlebar frame; a second connecting seat connected to the lower handlebar frame and pivotally connected to the first connecting seat; and a second locking member axially movably disposed between the first connecting seat and the second connecting seat to restrict or allow relative pivoting therebetween.

[0047] In one embodiment, the height adjustment locking mechanism further includes: a driving member movably disposed on a side of the first connecting seat facing away from the second connecting seat or a side of the second connecting seat facing away from the first connecting seat. The driving member axially passes through the first connecting seat or the second connecting seat and abuts against the second locking member to drive the second locking member to move; and a second traction member connecting the driving member and the second unlocking member. When the second unlocking member is operated, the second traction member drives the second locking member to move through the driving member to allow the first connecting seat to pivot relative to the second connecting seat. Description of the Drawings

[0048] The drawings constituting a part of this application are used to provide a further understanding of this application. The illustrative embodiments and descriptions thereof of this application are used to explain this application and do not constitute an improper limitation of this application.

[0049] To more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0050] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are only schematically drawn in the drawings and not necessarily drawn to the actual scale. In the drawings:

[0051] Figure 1 Schematically shows a perspective view of a cart frame in an embodiment of the present application;

[0052] Figure 2 Schematically shows a perspective view of another angle of the cart frame in an embodiment of the present application;

[0053] Figure 3 Is a cross-sectional view along Figure 1 Line U1-U1 in, where the first locking member is inserted into the locking recess;

[0054] Figure 4 Is a cross-sectional view along Figure 1 Line U1-U1 in, where the first locking member is withdrawn from the locking recess;

[0055] Figure 5 Is Figure 1 A perspective view of the rider frame in the shown cart frame;

[0056] Figure 6 Is Figure 1 A perspective view of another angle of the rider frame in the shown cart frame;

[0057] Figure 7 Is Figure 5 A perspective view of the upper rider frame in the shown rider frame, where the moving member and the second locking member in the height adjustment locking mechanism are assembled;

[0058] Figure 8 Is Figure 5 A perspective view of the upper rider frame in the shown rider frame, where the moving member and the second locking member in the height adjustment locking mechanism are separated;

[0059] Figure 9 Is Figure 2 An enlarged schematic view of the structure at circle A in;

[0060] Figure 10 Is Figure 5 An exploded view of the unlocking mechanism on the shown rider frame;

[0061] Figure 11 Is Figure 10A magnified schematic diagram of the structure at the middle circle B;

[0062] Figure 12 It is a partial structural schematic diagram of the release mechanism, wherein the toggle member is in the first position and the operating member is in the initial position;

[0063] Figure 13 It is a partial structural schematic diagram of the unlocking mechanism, wherein the toggle member is in the first position and the operating member is in the unlocking position;

[0064] Figure 14 It is a partial structural schematic diagram of the lock release mechanism, wherein the toggle member is in the second position and the operating member is in the initial position;

[0065] Figure 15 It is a partial structural schematic diagram of the unlocking mechanism, wherein the toggle member is in the second position and the operating member is in the unlocking position;

[0066] Figure 16 It is a three-dimensional diagram of a stroller frame in an embodiment of the present application when it is in an unfolded state, wherein the second locking member is in a second locking position;

[0067] Figure 17 It is a three-dimensional diagram of a stroller frame in an embodiment of the present application when it is in an unfolded state, wherein the second locking member is in a second unlocking position;

[0068] Figure 18 for Figure 16 a side view of the cart frame shown;

[0069] Figure 19 for Figure 16 An enlarged schematic diagram of the structure at circle A shown;

[0070] Figure 20 for Figure 17 An enlarged schematic diagram of the structure at circle B is shown;

[0071] Figure 21 for Figure 16 A cross-sectional view of the rider frame in the stroller frame shown, wherein the operating member is in an initial position;

[0072] Figure 22 for Figure 16 A cross-sectional view of the handlebar frame of the stroller frame, wherein the operating member is in the unlocked position and the first release member is rotated;

[0073] Figure 23 This is a three-dimensional diagram of a stroller frame in an embodiment of the present application when it is in a folded state;

[0074] Figure 24 A side view of a stroller frame in a folded state in one embodiment of the present application;

[0075] Figure 25 Cross-sectional view along line U1-U1 in Figure 18 ;

[0076] Figure 26 is Figure 23 an enlarged schematic view of the structure at the circled C shown;

[0077] Figure 27 is Figure 21 an enlarged schematic view of the structure at the circled D shown;

[0078] Figure 28 is Figure 16 a cross-sectional view of the rider frame in the trolley frame shown, where the operating member is in the unlocked position and the second unlocking member rotates;

[0079] Figure 29 is Figure 16 a perspective view of the unlocking mechanism in the trolley frame shown;

[0080] Figure 30 is Figure 29 a partial structural schematic view of the unlocking mechanism shown;

[0081] Figure 31 is Figure 29 an exploded view of the unlocking mechanism shown;

[0082] Figure 32 is Figure 30 a cross-sectional view of the unlocking mechanism shown;

[0083] Figure 33 is a perspective view of the trolley frame in the deployed state in the first embodiment of the present application;

[0084] Figure 34 is Figure 33 a cross-sectional view of the trolley frame shown;

[0085] Figure 35 is Figure 33 a perspective view of the trolley frame in the folded state shown;

[0086] Figure 36 is Figure 34 a cross-sectional view of the trolley frame shown;

[0087] Figure 37 is Figure 33 a cross-sectional view of the rider frame in the trolley frame shown;

[0088] Figure 38 is Figure 33 a perspective view of the unlocking mechanism in the trolley frame shown;

[0089] Figure 39 is Figure 38 a partial structural schematic view of the unlocking mechanism shown;

[0090] Figure 40 is Figure 38 an exploded view of the unlocking mechanism shown;

[0091] Figure 41 is Figure 37 a cross-sectional view of the unlocking mechanism shown, wherein the first unlocking member is rotated;

[0092] Figure 42 is Figure 37 a cross-sectional view of the unlocking mechanism shown, wherein the second unlocking member is rotated;

[0093] Figure 43 is Figure 39 a cross-sectional view of the unlocking mechanism shown;

[0094] Figure 44 is a perspective view of the rider frame in another embodiment;

[0095] Figure 45 is a perspective view of the rider frame in the cart frame of the second embodiment of the present application;

[0096] Figure 46 is Figure 45 a side view of the rider frame shown;

[0097] Figure 47 is Figure 45 an exploded view of a partial structure of the rider frame shown;

[0098] Figure 48 is Figure 45 a cross-sectional view of the rider frame shown, wherein the second locking member is in the locked position;

[0099] Figure 49 is Figure 45 a cross-sectional view of a partial structure of the rider frame shown, wherein the second locking member is in the unlocked position;

[0100] Figure 50 is a cross-sectional view of a partial structure of the rider frame in another embodiment.

[0101] Explanation of reference numerals

[0102] 1000X, cart frame; 100X, release mechanism; 110X, first release member; 111X, first connecting portion; 112X, first stop convex portion; 120X, second release member; 121X, second connecting portion; 122X, second stop convex portion; 130X, operating member; 131X, first driving portion; 132X, second driving portion; 133X, third driving portion; 134X, fourth driving portion; 135X, limit column; 140X, safety lock; 141X, toggle member; 14 11X, pushing part; 142X, first linking member; 1421X, first abutting part; 1422X, third abutting part; 1423X, first avoidance part; 143X, second linking member; 1431X, second abutting part; 1432X, fourth abutting part; 1433X, second avoidance part; 144X, third avoidance part; 150X, first elastic member; 160X, second elastic member; 171X, first fixed cover; 171X1, operating hole; 172X, second fixed cover; 200X , hand rack; 210X, upper hand rack; 211X, first support tube; 212X, push handle tube; 2121X, first stop recess; 2122X, second stop recess; 220X, lower hand rack; 221X, second support tube; 300X, wheel rack; 310X, front wheel rack; 311X, front rod; 312X, front crossbar; 313X, front wheel seat; 320X, rear wheel rack; 321X, rear rod; 322X, reinforcement rod; 323X, rear wheel seat; 400X, height adjustment Locking mechanism; 410X, rider locking assembly; 411X, moving member; 4111X, guide groove; 412X, second locking member; 413X, support seat; 414X, fourth elastic member; 420X, locking hole; 430X, second traction member; 500X, folding locking mechanism; 510X, first locking member; 520X, fixing member; 521X, locking recess; 530X, first traction member; 610X, front wheel; 620X, rear wheel; F1, first direction; F2, second direction;

[0103] 1000Y, cart frame; 100Y, handle frame; 110Y, support tube; 120Y, push handle tube; 130Y, fixed support seat; 140Y, mounting seat; 200Y, wheel frame; 210Y, front wheel frame; 220Y, rear wheel frame; 230Y, first transmission member; 240Y, handrail member; 250Y, second transmission member; 260Y, third transmission member; 270Y, wheel; 300Y, reversing locking mechanism; 310Y, first locking member; 311Y, locking part; 3 20Y, first engaging member; 330Y, second engaging member; 301Y, locking portion; 340Y, first driving member; 350Y, first traction member; 360Y, first connecting member; 370Y, first resetting member; 400Y, folding and locking mechanism; 410Y, second locking member; 420Y, second driving assembly; 421Y, second sliding sleeve; 422Y, second driving member; 430Y, second traction member; 440Y, second resetting member; 450Y, second connecting member; 500Y, Release mechanism; 510Y, first release member; 511Y, first connection portion; 520Y, second release member; 521Y, second connection portion; 530Y, operating member; 531Y, first drive portion; 532Y, second drive portion; 533Y, third drive portion; 534Y, fourth drive portion; 540Y, safety lock; 541Y, first linking member; 5411Y, first contact portion; 5412Y, third contact portion; 542Y, second linking member; 5421Y, second contact portion 5422Y, fourth abutment portion; 543Y, toggle member; 5431Y, push member; 544Y, third avoidance portion; 550Y, third reset member; 560Y, fourth reset member; 571Y, first fixed cover; 5711Y, operation hole; 572Y, second fixed cover; A1, first pivot point; A2, second pivot point; A3, third pivot point; A4, fourth pivot point; A5, fifth pivot point; A6, sixth pivot point; F1, first direction; F2, second direction;

[0104] 1000Z, trolley frame; 100Z, rider frame; 110Z, upper rider frame; 111Z, first support tube; 112Z, push handle tube; 120Z, lower rider frame; 121Z, second support tube; 130Z, height adjustment locking mechanism; 131Z, second locking assembly; 1311Z, second locking member; 13111Z, locking teeth; 1312Z, driving member; 132Z, first locking portion; 133Z, second locking portion; 1331Z, bottom second locking portion; 1332Z, middle second locking portion; 1333Z, top second locking portion; 1341Z, cover body; 1342Z, through space; 135Z, third reset member; 136Z, support seat; 1361Z, first guiding portion; 1363Z, first pushing inclined surface; 1364Z, second pushing inclined surface; 1365Z, first through channel; 1366Z, second through channel; 137Z, second traction member; 138Z, first connecting seat; 1381Z, first chamber; 1382Z, first locking groove; 139Z, second connecting seat; 1391Z, second chamber; 140Z, abutting member; 200Z, wheel frame; 210Z, front wheel frame; 211Z, front rod; 212Z, front cross bar; 220Z, rear wheel frame; 221Z, rear rod; 222Z, rear cross bar; 230Z, wheel seat; 230AZ, front wheel seat; 230BZ, rear wheel seat; 240Z, wheel; 240AZ, front wheel; 240BZ, rear wheel; 300Z, unlocking mechanism; 310Z, first unlocking member; 311Z, first connecting portion; 320Z, second unlocking member; 321Z, second connecting portion; 330Z, operating member; 331Z, first driving portion; 332Z, second driving portion; 333Z, third driving portion; 334Z, fourth driving portion; 340Z, mounting seat; 350Z, safety lock; 351Z, first linkage member; 3511Z, first abutting portion; 3512Z, third abutting portion; 352Z, second linkage member; 3521Z, second abutting portion; 3522Z, fourth abutting portion; 353Z, toggling member; 3531Z, pushing portion; 354Z, third avoiding portion; 360Z, fourth reset member; 370Z, fifth reset member; 381Z, first fixing cover; 3811Z, operating hole; 382Z, second fixing cover; 400Z, first pivot seat; 500Z, wheel locking mechanism; 510Z, first locking member; 520Z, first locking recess; 530Z, second reset member; 540Z, first traction member; 600Z, rider folding locking mechanism; 610Z, engaging member; 620Z, second locking recess; 630Z, fixing seat; 640Z, first reset member; α1, first angle; α2, second angle; α3, third angle; α4, fourth angle; F1, first direction; F2, second direction. Detailed implementation manner

[0105] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0106] Figure 1 and Figure 2 Fig. and

[0106] show a stroller frame 1000X provided according to some embodiments of the present invention. The overall structure of the stroller frame 1000X is generally symmetric about the left and right. It may include a handlebar frame 200X, a wheel frame 300X, a height adjustment locking mechanism 400X (see Figure 7 and Figure 8 ), a folding locking mechanism 500X (see Figure 3 and Figure 4 ), and an unlocking mechanism 100X provided according to some embodiments of the present invention. In the following description of the stroller frame 1000X, the handlebar frame 200X, the wheel frame 300X, the height adjustment locking mechanism 400X, the folding locking mechanism 500X, and the unlocking mechanism 100X will be described one by one.

[0107] Continuing to refer to Figure 1 and Figure 2 , the stroller frame 1000X can be used as the frame of a baby stroller, a pet stroller, or a cargo stroller, etc. Among them, the wheel frame 300X and the handlebar frame 200X are pivotally connected to each other so that the stroller frame 1000X can be switched between an unfolded state and a folded state (in other embodiments, the folded state can also be referred to as a collapsed state or a folded state). Specifically, the handlebar frame 200X includes an upper handlebar 210X and a lower handlebar 220X that can move relative to each other. One end of the lower handlebar 220X away from the upper handlebar 210X is pivotally connected to the wheel frame 300X. More specifically, the wheel frame 300X includes a pivotally connected front wheel frame 310X and a rear wheel frame 320X, and the lower handlebar 220X is pivotally connected to one of the front wheel frame 310X and the rear wheel frame 320X. For example, in the present embodiment, the lower handlebar 220X is pivotally connected to the front wheel frame 310X. Next, the specific structures of the wheel frame 300X (including the front wheel frame 310X and the rear wheel frame 320X) and the handlebar frame 200X (including the upper handlebar 210X and the lower handlebar 220X) will be further elaborated one by one.

[0108] Refer to Figure 1 and Figure 2, in one embodiment, the front wheel frame 310X is, for example, in a U-shaped structure, which includes front rods 311X located on the left and right sides and a front crossbar 312X connected between the two front rods 311X. The front crossbar 312X extends substantially along the first direction F1, which is equivalent to the left-right direction. When the stroller frame 1000X is used as the frame of a baby stroller, the front crossbar 312X can also be used as a footrest.

[0109] In one embodiment, at least one front wheel seat 313X is installed at the bottom of the front wheel frame 310X. Specifically, in this embodiment, as Figure 1 and Figure 2 shown, two front wheel seats 313X are installed at the bottom of the front wheel frame 310X, and the two front wheel seats 313X are spaced apart in the left-right direction (i.e., the first direction F1). More specifically, the two front wheel seats 313X are installed at the left and right ends of the front crossbar 312X, and the two front rods 311X are respectively connected to the front wheel seats 313X on the same side. Each front wheel seat 313X is respectively used to install a front wheel 610X so that the stroller frame 1000X can move. Of course, in another alternative embodiment, the front wheel frame 310X can also have other embodiments. For example, the front wheel frame 310X only includes two front rods 311X, and one end of the two front rods 311X is connected to form a V-shaped structure, and a front wheel seat 313X can be centrally installed at the bottom of the front wheel frame 310X. Or, for example, the front wheel frame 310X only includes two front rods 311X arranged substantially parallel to each other in the left-right direction, and the two front wheel seats 313X are respectively connected to the two front rods 311X.

[0110] It should be noted that unless otherwise clearly specified and limited, the "left" and "right" and other orientation terms related to the stroller frame 1000X in each embodiment of the present invention are based on the "left" and "right" orientations of the stroller frame 1000X during normal driving, and the "left" and "right" directions are schematically shown by arrows L and R in the figure. These orientation terms are only used to make the description of the embodiments of the present invention clearer and are not used to improperly limit the protection scope of the present invention.

[0111] In one embodiment, the rear wheel frame 320X can also be, for example, in a U-shaped structure, which includes two rear rods 321X located on the left and right sides and a rear crossbar (not shown in the figure) connected between the two rear rods 321X, and the rear crossbar extends along the first direction F1. Of course, in another alternative embodiment, the rear wheel frame 320X can have other embodiments. For example, the rear wheel frame 320X only includes two rear rods 321X, and one end of the two rear rods 321X is connected to form a V-shaped structure. Specifically, refer to Figure 1 and Figure 2, in this embodiment, the rear wheel frame 320X may include two rear rods 321X arranged substantially parallel to each other in the left-right direction, and a reinforcing rod 322X connected between the two rear rods 321X. In this way, the structural stability of the rear wheel frame 320X can be improved. Specifically, rear wheel seats 323X are respectively provided at the bottom ends of the two rear rods 321X. Each rear wheel seat 323X is respectively used to mount a rear wheel 620X so that the stroller frame 1000X can move. In this embodiment, the size of the rear wheel 620X is larger than that of the front wheel 610X to make the overall structure of the stroller frame 1000X more stable. Of course, in another alternative embodiment, the size of the rear wheel 620X can be the same as or larger than that of the front wheel 610X.

[0112] Specifically, in this embodiment, the upper ends of the two rear rods 321X are respectively pivotally connected to the front rod 311X on the same side to form a pivot point, that is, the rear rod 321X on the same side can rotate relative to the front rod 311X on the same side around the corresponding pivot point. In this way, the volume of the wheel frame 300X can be changed.

[0113] See Figure 1 and Figure 2 , the rider frame 200X includes an upper rider frame 210X and a lower rider frame 220X, and the two can move relative to each other. For example, the upper rider frame 210X can be slidably sleeved with the lower rider frame 220X. In this way, the height of the rider frame 200X relative to the ground can be changed to facilitate users of different heights to hold, improving the applicability of the stroller frame 1000X. Specifically, the upper rider frame 210X is, for example, in a U-shaped structure, which includes two first support tubes 211X and a push handle tube 212X connected between the two first support tubes 211X. The first support tubes 211X are straight tubes, and the push handle tube 212X is in a U-shaped structure and connected between the two first support tubes 211X for users to hold to push the stroller frame 1000X. More specifically, the lower rider frame 220X, for example, includes two second support tubes 221X. The upper ends of the two second support tubes 221X are, for example, respectively slidably sleeved with the first support tubes 211X on the same side, and the lower ends of the two second support tubes 221X are, for example, respectively pivotally connected to the front rod 311X on the same side. It should be noted that the two second support tubes 221X are respectively slidably sleeved with the first support tubes 211X on the same side includes two implementation manners: the second support tube 221X is sleeved outside the first support tube 211X, or the first support tube 211X is sleeved outside the second support tube 221X. Specifically, in this embodiment, the cooperation principle between the two is specifically described by taking the second support tube 221X being sleeved outside the first support tube 211X as an example.

[0114] To prevent the rider frame 200X from rotating relative to the wheel frame 300X arbitrarily and enable the pushcart frame 1000X to stably maintain the unfolded state, in one embodiment, the rider frame 200X and the wheel frame 300X can be restricted or allowed to pivot relative to each other through the folding and locking mechanism 500X. In addition, to prevent the upper rider frame 210X from moving arbitrarily relative to the lower rider frame 220X and enable the rider frame 200X to stably maintain a specific height, in one embodiment, the upper rider frame 210X and the lower rider frame 220X can be restricted or allowed to move relative to each other through the height adjustment locking mechanism 400X. The specific structures and working principles of the folding and locking mechanism 500X and the height adjustment locking mechanism 400X will be further elaborated below one by one.

[0115] See Figure 3 and Figure 4 , in one embodiment, the folding and locking mechanism 500X includes a first locking member 510X and a fixing member 520X. The fixing member 520X is provided with a locking recess 521X and is installed on one of the wheel frame 300X or the lower rider frame 220X. The first locking member 510X is movably disposed on the other of the wheel frame 300X or the lower rider frame 220X and is operably connected to the first unlocking member 110X. For example, when the fixing member 520X is disposed on the wheel frame 300X, the first locking member 510X is movably disposed in the lower rider frame 220X. Or, when the fixing member 520X is disposed on the lower rider frame 220X, the first locking member 510X is movably disposed on the wheel frame 300X. Specifically, in this embodiment, the fixing member 520X is fixedly disposed in the front rod member 311X of the front wheel frame 310X, and the first locking member 510X is movably disposed in the second support tube 221X of the lower rider frame 220X. When the first locking member 510X is inserted into the locking recess 521X (see Figure 3 ), the lower rider frame 220X is restricted from pivoting relative to the wheel frame 300X. When the first locking member 510X withdraws from the locking recess 521X (see Figure 4 ), the lower rider frame 220X can pivot relative to the wheel frame 300X.

[0116] In one embodiment, the folding and locking mechanism 500X further includes a first traction member 530X (see Figure 3 and Figure 4 ), and the first traction member 530X is used to connect the first locking member 510X. In this way, the user can drive the first locking member 510X to withdraw from the locking recess 521X by pulling the first traction member 530X.

[0117] In one embodiment, the folding locking mechanism 500X further includes a third elastic member (not shown in the figure). The third elastic member abuts between the first locking member 510X and the lower carriage frame 220X and is used to drive the first locking member 510X to reset, so that the third elastic member constantly has a tendency to insert into the locking recess 521X. Specifically, the third elastic member can be, for example, an elastic member such as a spring or an elastic sheet.

[0118] In this embodiment, in order to improve the stability of the folding locking mechanism 500X during locking, two folding locking mechanisms 500X are provided on the trolley frame 1000X, and one of the above-mentioned folding locking mechanisms 500X is provided between the front rod member 311X and the second support tube 221X on the same side.

[0119] See Figures 5 to 8 , in one embodiment, the height adjustment locking mechanism 400X includes a rider locking assembly 410X and a locking hole 420X. One of the upper carriage frame 210X and the lower carriage frame 220X is provided with the locking hole 420X, and the other is provided with the rider locking assembly 410X. Specifically, in this embodiment, the locking hole 420X is provided on the second support tube 221X of the lower carriage frame 220X, and the rider locking assembly 410X is provided on the first support tube 211X of the upper carriage frame 210X. The rider locking assembly 410X can be engaged with the locking hole 420X. Further, when the first support tube 211X and the corresponding second support tube 221X move relative to each other so that the rider locking assembly 410X and the locking hole 420X are opposite to each other, the rider locking assembly 410X inserts into the locking hole 420X to lock the upper carriage frame 210X and the lower carriage frame 220X. More specifically, a plurality of locking holes 420X are provided, and the plurality of locking holes 420X are arranged at intervals along the sliding direction of the upper carriage frame 210X relative to the lower carriage frame 220X. In this way, when the rider locking assembly 410X inserts into different locking holes 420X, the upper carriage frame 210X can be maintained at different heights relative to the lower carriage frame 220X.

[0120] See Figure 7 and Figure 8 , in one embodiment, according to the foregoing, the rider locking assembly 410X is disposed in the first support tube 211X of the upper carriage frame 210X. The rider locking assembly 410X includes a moving member 411X and a second locking member 412X. Among them, the moving member 411X is movably disposed in the first support tube 211X of the upper carriage frame 210X. Specifically, the moving member 411X is provided with a guiding groove 4111X, and the guiding groove 4111X extends obliquely with respect to the moving direction of the moving member 411X. The second locking member 412X has a guiding post (not shown in the figure), and the guiding post extends into the guiding groove 4111X and is slidably engaged with the guiding groove 4111X so as to be able to extend into or withdraw from the locking hole 420X. Specifically, in one embodiment, asFigure 7 and Figure 8 As shown in Figure 8 , the rider locking assembly 410X further includes a support base 413X fixedly disposed within the first support tube 211X. The second locking member 412X is movably disposed on the support base 413X to be able to extend into or retract from the locking hole 420X. More specifically, the rider locking assembly 410X further includes a fourth elastic member 414X (see Figure 8 ). The fourth elastic member 414X abuts between the support base 413X and the moving member 411X and is used to drive the moving member 411X to reset, so that the second locking member 412X constantly has a tendency to insert into the locking hole 420X. Specifically, the fourth elastic member 414X may also be an elastic member such as a spring or a spring piece.

[0121] In one embodiment, the height adjustment locking mechanism 400X further includes a second traction member 430X (see Figure 12 ). The second traction member 430X is used to connect the moving member 411X. In this way, the user can drive the moving member 411X to move by pulling the second traction member 430X, and thus indirectly drive the second locking member 412X to move away from the locking hole 420X.

[0122] In this embodiment, in order to improve the stability of the height adjustment locking mechanism 400X during locking, two height adjustment locking mechanisms 400X are provided on the trolley frame 1000X, and one of the above-mentioned height adjustment locking mechanisms 400X is provided between the first support tube 211X and the second support tube 221X on the same side.

[0123] In order to improve the convenience for the user to unlock the folding locking mechanism 500X and the height adjustment locking mechanism 400X, in some embodiments provided by the present invention, the unlocking mechanism 100X can perform unlocking operations on the folding locking mechanism 500X and the height adjustment locking mechanism 400X respectively. Specifically, as shown in Figure 9 and Figure 10As shown in the figure, the unlocking mechanism 100X includes a first unlocking member 110X, a second unlocking member 120X, and an operating member 130X. Among them, the first unlocking member 110X is rotatably arranged on the stroller frame 1000X, for example, it can be arranged on the handle frame 200X or the wheel frame 300X. The first unlocking member 110X is drivingly connected to the folding and locking mechanism 500X to allow the lower handle frame 220X to pivot relative to the wheel frame 300X. Specifically, the first unlocking member 110X is drivingly connected to the first locking member 510X in the folding and locking mechanism 500X. The second unlocking member 120X is rotatably arranged on the stroller frame 1000X, for example, it can be arranged on the handle frame 200X or the wheel frame 300X. The second unlocking member 120X is drivingly connected to the height adjustment locking mechanism 400X to allow the upper handle frame 210X to move relative to the lower handle frame 220X. Specifically, the second unlocking member 120X is drivingly connected to the moving member 411X in the height adjustment locking mechanism 400X. The operating member 130X is movably arranged on the stroller frame 1000X and is adapted to drive either the first unlocking member 110X or the second unlocking member 120X to rotate.

[0124] Since the first unlocking member 110X is rotatably arranged on the stroller frame 1000X and is drivingly connected to the first locking member 510X, the second unlocking member 120X is rotatably arranged on the stroller frame 1000X and is drivingly connected to the moving member 411X, and the operating member 130X is movable and used to drive either the first unlocking member 110X or the second unlocking member 120X to rotate. Therefore, the user can control the rotation of the first unlocking member 110X by driving the movement of the operating member 130X, and thereby indirectly control the first locking member 510X in the folding and locking mechanism 500X. When the first locking member 510X is inserted into the locking recess 521X, the stroller frame 1000X can be maintained in the unfolded state. When the first locking member 510X retreats from the locking recess 521X, the stroller frame 1000X can be switched from the unfolded state to the locked state. At the same time, the user can also control the rotation of the second unlocking member 120X by driving the movement of the operating member 130X, and thereby indirectly control the moving member 411X and the second locking member 412X in the height adjustment locking mechanism 400X. When the second locking member 412X is inserted into the locking hole 420X, the upper handle frame 210X and the lower handle frame 220X cannot slide relative to each other. When the second locking member 412X retreats from the locking hole 420X, the upper handle frame 210X and the lower handle frame 220X can slide relative to each other, that is, the height of the handle frame 200X can be adjusted. It is precisely because the user only needs to operate the above-mentioned unlocking mechanism 100X to respectively control different locking mechanisms, thus improving the operation convenience of the user.

[0125] To facilitate the user to operate the unlocking mechanism 100X, such as Figures 9 to 11As shown, the unlocking mechanism 100X is provided on the push handle tube 212X of the upper handrail frame 210X. Specifically, both the first unlocking member 110X and the second unlocking member 120X are in the shape of a disc, and the two are respectively rotatably mounted on the push handle tube 212X through connecting members such as shaft pins. More specifically, a first connecting portion 111X is provided on the first unlocking member 110X, and the first connecting portion 111X is arranged offset from the rotation center of the first unlocking member 110X. For example, it can be arranged in a straight line or in a non-straight line, but not limited thereto. The first connecting portion 111X is used to connect the folding and locking mechanism 500X. Specifically, in combination with Figure 3 , Figure 12 and Figure 13 , the first connecting portion 111X is connected to the first locking member 510X in the folding and locking mechanism 500X through a first traction member 530X. When the first unlocking member 110X rotates around its rotation center, the first connecting portion 111X will rotate synchronously around the rotation center of the first unlocking member 110X, and then drive the first traction member 530X to move to pull the first unlocking member 110X to move away from the locking recess 521X. Similarly, a second connecting portion 121X is provided on the second unlocking member 120X, and the second connecting portion 121X is arranged offset from the rotation center of the second unlocking member 120X. For example, it can be arranged in a straight line or in a non-straight line, but not limited thereto. The second connecting portion 121X is used to connect the height adjustment locking mechanism 400X. Specifically, in combination with Figure 14 and Figure 15 , the second connecting portion 121X is connected to the moving member 411X in the height adjustment locking mechanism 400X through a second traction member 430X. When the second unlocking member 120X rotates around its rotation center, the second connecting portion 121X will rotate synchronously around the rotation center of the second unlocking member 120X, and then drive the second traction member 430X to move to pull the moving member 411X to move. Under the action of the guiding groove 4111X, the first locking member 510X will be driven to move away from the locking hole 420X.

[0126] Specifically, in this embodiment, the first traction member 530X and the second traction member 430X can both be traction ropes, for example. More specifically, two first connecting portions 111X are provided on the first unlocking member 110X, and two second connecting portions 121X are provided on the second unlocking member 120X. The two first connecting portions 111X are respectively connected to the two first traction members 530X, and the two second connecting portions 121X are respectively connected to the two second traction members 430X. In this way, when the first unlocking member 110X rotates, the two first locking members 510X can be simultaneously controlled to move away from the corresponding locking recesses 521X. When the second unlocking member 120X rotates, the two moving members 411X can be simultaneously controlled to move, and then the two second locking members 412X are controlled to move away from the corresponding locking holes 420X.

[0127] See Figure 9 and Figures 12 to 15 , the unlocking mechanism 100X further includes a safety lock 140X (in other embodiments, the safety lock 140X may also be referred to as the frame folding safety lock 140X). The safety lock 140X is movably disposed on the stroller frame 1000X and can be switched between a first position and a second position. When the safety lock 140X is pushed to be in the first position, the operating member 130X is drivingly connected to the first unlocking member 110X through the safety lock 140X. When the safety lock 140X is pushed to be in the second position, the operating member 130X is drivingly connected to the second unlocking member 120X through the safety lock 140X. Specifically, when the user needs to unlock the folding locking mechanism 500X so that the stroller frame 1000X can be switched from the unfolded state to the folded state, the safety lock 140X can be moved to the first position. In this way, by operating the operating member 130X, the first unlocking member 110X can be rotated. When the user needs to unlock the height adjustment locking mechanism 400X so that the height of the stroller frame 200X is adjustable, the safety lock 140X can be moved to the second position. In this way, by operating the operating member 130X, the second unlocking member 120X can be rotated.

[0128] See Figures 12 to 15 , in an embodiment, the safety lock 140X includes a toggling member 141X, a first linkage member 142X, and a second linkage member 143X. Among them, the toggling member 141X is movably disposed on the stroller frame 1000X (such as the push handle tube 212X) along a first direction F1 and can be switched between a first position and a second position. The first linkage member 142X is movably connected to the toggling member 141X along a second direction F2 and is drivingly connected to the first unlocking member 110X. The second linkage member 143X is movably connected to the toggling member 141X along the second direction F2 and is drivingly connected to the second unlocking member 120X. Among them, the first direction F1 intersects the second direction F2, and the operating member 130X can move relative to the stroller frame 1000X along the second direction F2. Specifically, when the toggling member 141X is in the first position, the operating member 130X can be operated to push the first linkage member 142X to move along the second direction F2, and further the first unlocking member 110X can be rotated. When the toggling member 141X is in the second position, the operating member 130X can be operated to push the second linkage member 143X to move along the second direction F2, and further the second unlocking member 120X can be rotated.

[0129] Continue to refer to Figures 12 to 15 , in an embodiment, the first linkage member 142X has a first abutting portion 1421X, and the second linkage member 143X has a second abutting portion 1431X. The operating member 130X has a first driving portion 131X and a second driving portion 132X which are spaced apart. As Figure 12 and Figure 13As shown, when the toggle member 141X is located at the first position, the first contact portion 1421X is opposite to the first driving portion 131X, and the second contact portion 1431X is misaligned with the second driving portion 132X. In this way, when the operating member 130X moves upward along the second direction F2, the first driving portion 131X can abut against the first contact portion 1421X, thereby pushing the first linking member 142X to move along the second direction F2, thereby driving the first release member 110X to rotate, and finally realizing the release of the folding locking mechanism 500X. At the same time, since the second contact portion 1431X is misaligned with the second driving portion 132X, when the operating member 130X moves upward along the second direction F2, the second driving portion 132X will not contact the second contact portion 1431X, thereby making the second linking member 143X and the second release member 120X both remain stationary, that is, when the operating member 130X is operated, it will not affect the height adjustment locking mechanism 400X. like Figure 14 and Figure 15 As shown, when the toggle member 141X is located at the second position, the second contact portion 1431X is located opposite to the second driving portion 132X, and the first contact portion 1421X is misaligned with the first driving portion 131X. In this way, when the operating member 130X moves upward along the second direction F2, the second driving portion 132X can abut against the second contact portion 1431X, thereby pushing the second linking member 143X to move along the second direction F2, thereby driving the second release member 120X to rotate, and finally realizing the release of the height adjustment locking mechanism 400X. At the same time, since the first contact portion 1421X is misaligned with the first driving portion 131X, when the operating member 130X moves upward along the second direction F2, the first driving portion 131X will not contact the first contact portion 1421X, thereby making the first linking member 142X and the first release member 110X both remain stationary, that is, when the operating member 130X is operated, it will not affect the folding locking mechanism 500X.

[0130] See also Figures 12 to 15 In one embodiment, the operating member 130X further includes a third driving portion 133X and a fourth driving portion 134X. The third driving portion 133X and the fourth driving portion 134X are spaced apart and located between the first driving portion 131X and the second driving portion 132X. The first linking member 142X and the second linking member 143X are spaced apart and a third avoidance portion 144X is formed therebetween. Specifically, the first linking member 142X further includes a third abutting portion 1422X, and the second linking member 143X further includes a fourth abutting portion 1432X. Figure 12 and Figure 13As shown, when the toggling member 141X is in the first position, the third abutting portion 1422X abuts against the third driving portion 133X, the first abutting portion 1421X abuts against the first driving portion 131X, and the fourth driving portion 134X abuts against the third avoiding portion 144X. Therefore, when the operating member 130X moves upward along the second direction F2, the first driving portion 131X can abut against the first abutting portion 1421X, and the third abutting portion 1422X can abut against the third driving portion 133X, so as to simultaneously push the first linkage member 142X to move along the second direction F2. At the same time, when the operating member 130X moves upward along the second direction F2, the fourth driving portion 134X is gradually inserted into the third avoiding portion 144X, avoiding the situation that the second linkage member 143X is driven to move when the toggling member 141X is in the first position. As Figure 14 and Figure 15 shown, when the toggling member 141X is in the second position, the fourth abutting portion 1432X abuts against the fourth driving portion 134X, the second abutting portion 1431X abuts against the second driving portion 132X, and the third driving portion 133X abuts against the third avoiding portion 144X. Therefore, when the operating member 130X moves upward along the second direction F2, the second driving portion 132X can abut against the second abutting portion 1431X, and the fourth abutting portion 1432X can abut against the fourth driving portion 134X, so as to simultaneously push the second linkage member 143X to move along the second direction F2. At the same time, when the operating member 130X moves upward along the second direction F2, the third driving portion 133X is gradually inserted into the third avoiding portion 144X, avoiding the situation that the first linkage member 142X is driven to move when the toggling member 141X is in the second position.

[0131] See Figure 12 and Figure 14 , in an embodiment, the unlocking mechanism 100X further includes a first elastic member 150X. The first elastic member 150X abuts between the cart frame 1000X (such as the push handle tube 212X) and the toggling member 141X, and is used to provide an elastic restoring force for the toggling member 141X, so that the toggling member 141X is kept in the first position or the second position. For example, when the first elastic member 150X is used to always keep the toggling member 141X in the first position, if it is necessary to unlock the folding locking mechanism 500X, the operating member 130X can be directly operated (such as pressing or pushing upward). If it is necessary to unlock the height adjustment locking mechanism 400X, it is necessary to first move the toggling member 141X to the second position and then operate the operating member 130X. After the height adjustment locking mechanism 400X is unlocked, release the toggling member 141X, and under the reset action of the first elastic member 150X, the toggling member 141X automatically resets to the first position.

[0132] In an embodiment, as Figure 12 and Figure 14As shown, a first avoidance portion 1423X is formed between the first abutting portion 1421X and the third abutting portion 1422X. A second avoidance portion 1433X is formed between the second abutting portion 1431X and the fourth abutting portion 1432X. Specifically, when the toggling member 141X is in the first position and the operating member 130X is operated, the second avoidance portion 1433X is used to avoid the second driving portion 132X. When the toggling member 141X is in the second position and the operating member 130X is operated, the first avoidance portion 1423X is used to avoid the first driving portion 131X.

[0133] In an embodiment, one of the first linkage member 142X and the first unlocking member 110X has a first guiding concave portion (not shown in the figure), and the other has a first mating convex portion (not shown in the figure). The first mating convex portion is slidably disposed within the first guiding concave portion, and the first guiding concave portion extends along the first direction F1. Similarly, one of the second linkage member 143X and the second unlocking member 120X has a second guiding concave portion (not shown in the figure), and the other has a second mating convex portion (not shown in the figure). The second mating convex portion is slidably disposed within the second guiding concave portion, and the second guiding concave portion extends along the first direction F1. In this way, when the toggling member 141X switches between the first position and the second position along the first direction F1, it can drive the first linkage member 142X and the second linkage member 143X to move left and right simultaneously along the first direction F1, keeping the first unlocking member 110X and the second unlocking member 120X stationary; at the same time, when the first linkage member 142X moves up and down along the second direction F2, the first linkage member 142X can also drive the first unlocking member 110X to rotate; and when the second linkage member 143X moves up and down along the second direction F2, the second linkage member 143X can also drive the second unlocking member 120X to rotate.

[0134] In an embodiment, when the operating member 130X moves in the second direction F2, it has an initial position (see Figure 12 and Figure 14 ) and an unlocking position (see Figure 13 and Figure 15) When the operating member 130X is in the initial position, the operating member 130X can be operated to move and push the first linkage member 142X or the second linkage member 143X to move. In other words, when the operating member 130X is in the initial position, there may be a gap or just contact between the first driving portion 131X on the operating member 130X and the first abutting portion 1421X, and between the third driving portion 133X and the third abutting portion 1422X (or between the second driving portion 132X and the second abutting portion 1431X, and between the fourth driving portion 134X and the fourth abutting portion 1432X). In this way, the first linkage member 142X (or the second linkage member 143X) can be pushed to move upward by pushing or pressing the operating member 130X upward. When the operating member 130X is in the unlocking position, the operating member 130X pushes the first linkage member 142X or the second linkage member 143X.

[0135] See Figures 11 to 13 , in an embodiment, the unlocking mechanism 100X further includes a second elastic member 160X. The second elastic member 160X abuts between the cart frame 1000X and the operating member 130X and is used to provide an elastic restoring force for the operating member 130X to keep the operating member 130X in the initial position. The second elastic member 160X can also be an elastic member with elasticity such as a spring or a spring piece, for example. Specifically, in this embodiment, as Figure 9 and Figure 11 shown, the second elastic member 160X is a spring. A limiting post 135X is provided on the operating member 130X. The spring is sleeved outside the limiting post 135X, and its two ends respectively abut against the operating member 130X and the push handle tube 212X.

[0136] See Figure 9 and Figure 11, in an embodiment, one of the first unlocking member 110X and the cart frame 1000X is provided with a first stop recess 2121X, and the other is provided with a first stop protrusion 112X. When the operating member 130X is switched to the initial position, the first stop protrusion 112X abuts against one side wall of the first stop recess 2121X. When the operating member 130X is switched to the unlocking position, the first stop protrusion 112X abuts against the other side wall corresponding to the first stop recess 2121X. In this way, the rotation direction of the first unlocking member 110X can be controlled, avoiding the problem that the first unlocking member 110X cannot pull the first locking member 510X away from the locking recess 521X by the first traction member 530X when rotating due to not rotating in the preset rotation direction. In addition, the distance between the two opposite side walls of the first stop recess 2121X defines the rotation range of the first stop protrusion 112X around the rotation center of the first unlocking member 110X. Specifically, the first stop recess 2121X is provided on the push handle tube 212X, and the first stop protrusion 112X is provided on the first unlocking member 110X. Similarly, one of the second unlocking member 120X and the cart frame 1000X is provided with a second stop recess 2122X, and the other is provided with a second stop protrusion 122X. When the operating member 130X is switched to the initial position, the second stop protrusion 122X abuts against one side wall of the second stop recess 2122X. When the operating member 130X is switched to the unlocking position, the second stop protrusion 122X abuts against the other side wall corresponding to the second stop recess 2122X. In this way, the rotation direction of the second unlocking member 120X can be controlled, avoiding the problem that the second unlocking member 120X cannot move the moving member 411X by the second traction member 430X when rotating due to not rotating in the preset rotation direction. In addition, the distance between the two opposite side walls of the second stop recess 2122X defines the rotation range of the second stop protrusion 122X around the rotation center of the second unlocking member 120X. Specifically, the second stop recess 2122X is provided on the push handle tube 212X, and the second stop protrusion 122X is provided on the second unlocking member 120X.

[0137] See Figure 6 and Figure 11, in one embodiment, the unlocking mechanism 100X further includes a first fixed cover 171X and a second fixed cover 172X. The first fixed cover 171X is disposed on the top of the push handle tube 212X, and the second fixed cover 172X is disposed on the bottom of the push handle tube 212X. A through hole for the operating member 130X to pass through is provided on the second fixed cover 172X. The first fixed cover 171X and the second fixed cover 172X are connected and cooperated with each other and fixed to the push handle tube 212X. In this way, components such as the operating member 130X can be limited in position to prevent the operating member 130X and the like from detaching from the push handle tube 212X. In addition, by covering the first fixed cover 171X and the second fixed cover 172X outside the first unlocking member 110X, the second unlocking member 120X, and the safety lock 140X, the unlocking mechanism 100X and the cart frame 1000X can be simplified and beautified. Specifically, as Figure 6 shown, an operation hole 1711X is provided on the first fixed cover 171X, and a pushing portion 1411X is provided on the toggling member 141X. The pushing portion 1411X can pass through the operation hole 1711X for the user to hold, and the user can change the position of the toggling member 141X by pushing the pushing portion 1411X.

[0138] Figure 16 and Figure 17 show a cart frame 1000Y provided according to some embodiments of the present invention. The overall structure of the cart frame 1000Y is generally symmetrical left and right, and it can be used as the frame of a baby stroller, a pet stroller, a cargo stroller, etc. For example, in this embodiment, the cart frame 1000Y is described as the frame of a baby stroller to illustrate its structure and working principle.

[0139] See Figures 16 to 18 , in one embodiment, the cart frame 1000Y may include, for example, a handle frame 100Y, a wheel frame 200Y, a reversing locking mechanism 300Y (see Figure 19 and Figure 20 ), a folding locking mechanism 400Y (see Figure 19 and Figure 20 ), and an unlocking mechanism 500Y provided according to some embodiments of the present invention. Since the cart frame 1000Y has a symmetrical structure, hereinafter, taking one side as an example, while describing the cart frame 1000Y in detail, the handle frame 100Y, the wheel frame 200Y, the reversing locking mechanism 300Y, the folding locking mechanism 400Y, and the unlocking mechanism 500Y will be described together.

[0140] Continuing to refer to Figures 16 to 18 , in one embodiment, the handle frame 100Y is rotatably disposed on the wheel frame 200Y. In this way, the handle frame 100Y can rotate relative to the wheel frame 200Y for reversing; or, the handle frame 100Y can rotate relative to the wheel frame 200Y for folding, so that the cart frame 1000Y can be in an unfolded state (see Figure 16and Figure 18 ) and a collapsed state (in other embodiments, the collapsed state may also be referred to as a folded state or a folding state) (see Figure 23 and Figure 24 ) to switch between. In one embodiment, as Figures 16 to 18 shown, the rider frame 100Y is pivotally connected to the wheel frame 200Y at a first pivot point A1, so that the rider frame 100Y has a first use position relative to the wheel frame 200Y (see Figure 16 ) and a second use position (not shown in the figure). Specifically, the rider frame 100Y can pivot relative to the first pivot point A1, so that the rider frame 100Y can switch between the first use position and the second use position. Considering the orientation of the stroller frame 1000Y, in this embodiment, when the rider frame 100Y is in the first use position, the top of the rider frame 100Y is located on the first side of the wheel frame 200Y. When the rider frame 100Y is in the second use position, the top of the rider frame 100Y is located on the second side of the wheel frame 200Y. Among them, the first side and the second side are oppositely arranged with respect to the traveling direction (i.e., the front-rear direction) of the stroller frame 1000Y.

[0141] It should be noted that unless otherwise clearly specified and limited, the orientation terms such as "left", "right", "front", and "rear" of the stroller frame 1000Y in each embodiment of the present invention are based on the "left", "right", "front", and "rear" orientations of the stroller frame 1000Y in the first use position and traveling normally, and the arrows L and R are used in the figure to schematically show "left" and "right", and the arrows P and B are used to schematically show "front" and "rear". These orientation terms are only used to make the description of the embodiments of the present invention clearer and do not improperly limit the protection scope of the present invention.

[0142] See Figure 16 and Figure 17 , in one embodiment, the rider frame 100Y is, for example, in a U-shaped structure, which includes support tubes 110Y located on the left and right sides and a push handle tube 120Y connected between the two support tubes 110Y. The support tubes 110Y are in a straight tube structure, and the push handle tube 120Y is in a U-shaped structure and connected between the two support tubes 110Y for a user to hold to push the stroller frame 1000Y. Specifically, the push handle tube 120Y is connected to the top ends of the support tubes 110Y, and the bottom ends of the support tubes 110Y are pivotally connected to the wheel frame 200Y at the first pivot point A1. Of course, in other embodiments, the support tubes 110Y may also be in a non-straight tube structure, or the push handle tube 120Y may also be in a straight tube structure, which is not specifically limited here.

[0143] See Figures 16 to 18, in one embodiment, the wheel frame 200Y may include, for example, a front wheel frame 210Y, a rear wheel frame 220Y, and a first transmission member 230Y. Among them, the front wheel frame 210Y is pivotally connected to the rear wheel frame 220Y to form a second pivot point A2. The front wheel frame 210Y is located in front of the rear wheel frame 220Y along the front-rear direction of the stroller frame 1000Y. Wheels 270Y are connected to the bottom of the front wheel frame 210Y and the bottom of the rear wheel frame 220Y. The first transmission member 230Y is pivotally connected between the rear wheel frame 220Y and the rider frame 100Y. Specifically, the first end of the first transmission member 230Y is pivotally connected to the rider frame 100Y to form the above-mentioned first pivot point A1, and the second end of the first transmission member 230Y is pivotally connected to the rear wheel frame 220Y to form a third pivot point A3. Therefore, in view of the wheel frame 200Y, the above-mentioned "first side" can be regarded as the side where the rear wheel frame 220Y is away from the front wheel frame 210Y, and the "second side" can be regarded as the side where the front wheel frame 210Y is away from the rear wheel frame 220Y.

[0144] In one embodiment, the stroller frame 1000Y further includes a seat assembly (not shown in the figure), and the seat assembly is arranged on the wheel frame 200Y for a child to sit on. When the rider frame 100Y is in the first use position (see Figure 16 and Figure 18 ), if the user wants to push the stroller frame 1000Y to move through the rider frame 100Y, the user needs to stand behind the stroller frame 1000Y to hold the rider frame 100Y. At this time, the user stands with his back to the child's face. When the rider frame 100Y is in the second use position, if the user wants to push the stroller frame 1000Y to move through the rider frame 100Y, the user needs to stand in front of the stroller frame 1000Y to hold the rider frame 100Y. At this time, the user stands facing the child's face.

[0145] To prevent the rider frame 100Y from rotating relative to the wheel frame 200Y randomly for commutation; in other words, to enable the rider frame 100Y to stably maintain the first use position or the second use position. In one embodiment, the rider frame 100Y and the wheel frame 200Y can limit or allow the rider frame 100Y to rotate relative to the wheel frame 200Y for commutation operations through a commutation locking mechanism 300Y. Specifically, in this embodiment, in order to improve the stability of the commutation locking mechanism 300Y when locking, two commutation locking mechanisms 300Y are provided on the stroller frame 1000Y and are respectively located on the left and right sides of the stroller frame 1000Y.

[0146] Please refer to Figure 16 , Figure 19 and Figure 20, in one embodiment, a commutation locking mechanism 300Y is disposed between the vehicle frame 100Y and the wheel frame 200Y. The commutation locking mechanism 300Y may include a first locking member 310Y, a first engaging member 320Y, and a second engaging member 330Y. Among them, the first engaging member 320Y and the second engaging member 330Y are circumferentially spaced apart around a first pivot point A1 on the wheel frame 200Y. The first locking member 310Y is disposed on the vehicle frame 100Y and is adapted to engage with the first engaging member 320Y or the second engaging member 330Y. When the first locking member 310Y engages with the first engaging member 320Y, the vehicle frame 100Y is in a first use position. When the first locking member 310Y engages with the second engaging member 330Y, the vehicle frame 100Y is in a second use position.

[0147] Please refer to Figures 19 to 22 , in one embodiment, the first locking member 310Y has a locking portion 311Y, and both the first engaging member 320Y and the second engaging member 330Y are provided with a locking portion 301Y adapted to engage with the locking portion 311Y. Among them, one of the locking portion 311Y and the locking portion 301Y may be a protrusion, and the other may be a groove. The protrusion and the groove can be locked and matched by means of concave-convex engagement. Specifically, the first locking member 310Y is movably disposed on the vehicle frame 100Y and has a first locking position and a first unlocking position. When the first locking member 310Y is in the first locking position, the locking portion 311Y engages with the locking portion 301Y to restrict the vehicle frame 100Y from switching between the first use position and the second use position. When the first locking member 310Y is in the first unlocking position, the locking portion 311Y disengages from the locking portion 301Y to allow the vehicle frame 100Y to switch between the first use position and the second use position. More specifically, the first locking member 310Y is a sliding sleeve structure, which is sleeved outside the support tube 110Y of the vehicle frame 100Y and can slide along the length direction of the support tube 110Y so that it can move between the first locking position and the first unlocking position.

[0148] Please refer to Figure 16 , Figure 21 and Figure 22, in one embodiment, the commutation locking mechanism 300Y may further include a first driving member 340Y and a first traction member 350Y. Among them, the first driving member 340Y is movably disposed on the vehicle frame 100Y and connected to the first locking member 310Y, and the first traction member 350Y is connected to the first driving member 340Y. In this way, the first driving member 340Y can be driven to move through the first traction member 350Y, and then drive the first locking member 310Y to move. Specifically, in this embodiment, both the first driving member 340Y and the first traction member 350Y are movably disposed in the inner cavity of the vehicle frame 100Y, and the first driving member 340Y is fixedly connected to the first locking member 310Y through a first connecting member 360Y (such as a shaft or a pin, etc.) passing through the vehicle frame 100Y. It should be noted that since both the support tube 110Y and the push handle tube 120Y are hollow tubular structures, the "inner cavity of the vehicle frame 100Y" may refer to the tubular inner cavities of the support tube 110Y and / or the push handle tube 120Y. Setting the first driving member 340Y and the first traction member 350Y in the inner cavity of the vehicle frame 100Y not only improves the space utilization rate, but also makes the appearance of the vehicle frame 100Y more tidy and beautiful.

[0149] In one embodiment, as Figure 21 and Figure 22 shown, a fixed support seat 130Y is provided in the inner cavity of the vehicle frame 100Y. Specifically, the fixed support seat 130Y is disposed in the support tube 110Y and used to support the first driving member 340Y. In one embodiment, the commutation locking mechanism 300Y further includes a first reset member 370Y, which may be an elastic reset member such as a spring or a spring piece, etc. The first reset member 370Y abuts between the first driving member 340Y and the fixed support seat 130Y, and is used to drive the first driving member 340Y to reset, so that the first driving member 340Y constantly has a tendency to drive the first locking member 310Y to be in the first locking position. In this way, when the pulling force acting on the first traction member 350Y no longer exists, the first driving member 340Y can automatically reset under the reset force of the first reset member 370Y and drive the first locking member 310Y to move to the first locking position.

[0150] In one embodiment, when the vehicle frame 100Y pivots around the first pivot point A1, the vehicle frame 100Y further has a third use position relative to the wheel frame 200Y. Specifically, as Figure 16 and Figure 18 shown, when the vehicle frame 100Y is in the first use position, the vehicle frame 100Y pivots around the first pivot point A1 and is away from the wheel frame 200Y, so that the stroller frame 1000Y is in the unfolded state. As Figure 23 and Figure 24As shown, when the rider frame 100Y is in the third use position, the rider frame 100Y and the wheel frame 200Y approach each other around the first pivot point A1, so that the stroller frame 1000Y is in a folded state.

[0151] Please refer to Figure 16 , Figure 19 , Figure 20 and Figure 25 . In one embodiment, the wheel frame 200Y further includes an armrest member 240Y, a second transmission member 250Y, and a third transmission member 260Y. Among them, the tops of the front wheel frame 210Y and the rear wheel frame 220Y are both pivotally connected to the armrest member 240Y and form the above-mentioned second pivot point A2 on the armrest member 240Y. The first end of the second transmission member 250Y is pivotally connected to the front wheel frame 210Y and forms a fourth pivot point A4. The second end of the second transmission member 250Y extends rearward to the rear wheel frame 220Y and is pivotally connected to the first end of the third transmission member 260Y and forms a fifth pivot point A5. The second end of the third transmission member 260Y is pivotally connected to the armrest member 240Y and forms a sixth pivot point A6. Among them, the second transmission member 250Y can be used to support the above-mentioned seat assembly. When a child is sitting on the seat assembly, his or her arms can be placed on the armrest member 240Y. This can not only improve the riding comfort, but also the armrest member 240Y can limit the riding space of the child and prevent the child from falling off the seat assembly.

[0152] Specifically, please refer to Figure 19 , Figure 20 and Figure 25 . In this embodiment, the third transmission member 260Y and the rider frame 100Y are arranged parallel to each other in the left-right direction and are respectively located on the left and right sides of the first transmission member 230Y. The first end of the third transmission member 260Y is fixedly connected to the rider frame 100Y through a fixing member (not shown in the figure) passing through the first transmission member 230Y. It should be noted that in this embodiment, the connection point between the third transmission member 260Y and the rider frame 100Y is coaxially arranged with the first pivot point A1. In addition, the pivot point (i.e., the fifth pivot point A5) between the second transmission member 250Y and the third transmission member 260Y is coaxially arranged with the first pivot point A1.

[0153] Please refer to Figure 16 , Figure 17 , Figure 19 and Figure 20, in this embodiment, when the rider frame 100Y is fixed relative to the first transmission member 230Y, the third transmission member 260Y also remains relatively fixed with respect to the first transmission member 230Y, that is, the third transmission member 260Y cannot rotate around the first pivot point A1. In this way, the armrest member 240Y, the rear wheel frame 220Y, the first transmission member 230Y, and the third transmission member 260Y remain relatively fixed to each other. At the same time, the third transmission member 260Y also remains relatively fixed with respect to the second transmission member 250Y, and the second transmission member 250Y can be stably supported between the front wheel frame 210Y and the rear wheel frame 220Y. Therefore, the stroller frame 1000Y can be stably maintained in the unfolded state. When the rider frame 100Y rotates around the first pivot point A1 relative to the first transmission member 230Y, the rider frame 100Y can drive the third transmission member 260Y to rotate around the fifth pivot point A5 and the sixth pivot point A6 simultaneously through the fixing member. During this process, the rider frame 100Y can also push the first transmission member 230Y to pivot around the third pivot point A3; synchronously, the third transmission member 260Y can also drive the armrest member 240Y to rotate around the second pivot point A2, and at the same time push the second transmission member 250Y to pivot around the fourth pivot point A4, so that the front wheel frame 210Y and the rear wheel frame 220Y rotate relative to the second pivot point A2, and finally the stroller frame 1000Y is folded. Specifically, the folding process of the stroller frame 1000Y can be referred to the description hereinafter.

[0154] To prevent the rider frame 100Y from rotating relative to the wheel frame 200Y randomly for folding, in other words, to enable the rider frame 100Y to be stably maintained in the first use position or the third use position. In one embodiment, the rider frame 100Y and the wheel frame 200Y can limit or allow the rider frame 100Y to rotate relative to the wheel frame 200Y for folding operation by means of the folding locking mechanism 400Y. Specifically, in this embodiment, in order to improve the stability of the folding locking mechanism 400Y when it is locked, two folding locking mechanisms 400Y are provided on the stroller frame 1000Y and are respectively located on the left and right sides of the stroller frame 1000Y.

[0155] Please refer to Figure 19 and Figure 20 , in one embodiment, the folding locking mechanism 400Y is disposed between the rider frame 100Y and the wheel frame 200Y. The folding locking mechanism 400Y includes a second locking member 410Y, and the second locking member 410Y is movable relative to the rider frame 100Y and has a second locking position and a second unlocking position. Specifically, the second locking member 410Y is movably disposed on the third transmission member 260Y. Of course, in other embodiments, the second locking member 410Y can also be movably disposed on the rider frame 100Y, and no specific limitation is made here. Specifically, when the second locking member 410Y moves to the second locking position, the second locking member 410Y engages with the first transmission member 230Y (see Figure 19), in this way, the third transmission member 260Y can be restricted from pivoting relative to the first transmission member 230Y, and the rider frame 100Y can also be restricted from pivoting relative to the first transmission member 230Y, ultimately restricting the rider frame 100Y from switching between the first use position and the third use position. When the second locking member 410Y moves to the second unlocking position, the second locking member 410Y disengages from the first transmission member 230Y (see Figure 20 ), in this way, the third transmission member 260Y can be allowed to pivot relative to the first transmission member 230Y, and the rider frame 100Y can also be allowed to pivot relative to the first transmission member 230Y, ultimately allowing the rider frame 100Y to switch between the first use position and the third use position.

[0156] In one embodiment, the first transmission member 230Y has a first recess (not shown in the figure) and a second recess (not shown in the figure). Specifically, both the first recess and the second recess are located at one end of the first transmission member 230Y close to the first pivot point A1, and the two are arranged oppositely along the circumferential direction of the first pivot point A1. When the stroller frame 1000Y is in the unfolded state, the second locking member 410Y engages with the first recess (see Figure 19 ) to keep the stroller frame 1000Y in the unfolded state. When the stroller frame 1000Y is in the folded state, the second locking member 410Y engages with the second recess (see Figure 26 ) to keep the stroller frame 1000Y in the folded state and prevent the stroller frame 1000Y from accidentally unfolding during transportation or storage.

[0157] Please refer to Figure 19 , Figure 20 , Figure 27 and Figure 28, in one embodiment, the folding locking mechanism 400Y further includes a second driving component 420Y and a second traction member 430Y. Among them, the second driving component 420Y is movably arranged on the bicycle frame 100Y and is drivingly engaged with the second locking member 410Y, and the second traction member 430Y is connected to the second driving component 420Y. In this way, the second driving component 420Y can be driven to move by the second traction member 430Y, and then drive the second locking member 410Y to move. Specifically, the second driving component 420Y includes a second sliding sleeve 421Y and a second driving member 422Y. The second sliding sleeve 421Y is sleeved outside the support tube 110Y of the bicycle frame 100Y and can slide along the length direction of the support tube 110Y. The second sliding sleeve 421Y can abut against or be connected to the second locking member 410Y. The second driving member 422Y is movably arranged on the fixed support seat 130Y in the inner cavity of the bicycle frame 100Y and is connected to the second sliding sleeve 421Y through a second connecting member 450Y (such as a shaft or a pin, etc.) passing through the bicycle frame 100Y. The second traction member 430Y is movably arranged in the inner cavity of the bicycle frame 100Y and is connected to the second driving member 422Y. When the second traction member 430Y moves, it can drive the second driving member 422Y to drive the second sliding sleeve 421Y to move, so as to drive the second locking member 410Y to move from the second locking position to the second unlocking position.

[0158] Please refer to Figure 19 , Figure 20 and Figure 27 and Figure 28 , in one embodiment, the folding locking mechanism 400Y further includes a second reset member 440Y and a fifth reset member (not shown in the figure). The second reset member 440Y and the fifth reset member can both be elastic reset members such as springs or elastic sheets, etc. Among them, as Figure 27 and Figure 28 shown, the second reset member 440Y abuts between the second driving member 422Y and the fixed support seat 130Y and is used to drive the second driving member 422Y to reset. The fifth reset member provides an elastic restoring force for the second locking member 410Y to bias it towards the second locking position. Specifically, in this embodiment, the second sliding sleeve 421Y drives the second locking member 410Y to move from the second locking position to the second unlocking position by means of pushing. Therefore, when the second driving member 422Y resets to drive the second sliding sleeve 421Y to reset, the second sliding sleeve 421Y will separate from the second locking member 410Y, and the second locking member 410Y can automatically move from the second unlocking position to the second locking position under the elastic restoring force of the fifth reset member. In this way, when the pulling force acting on the second traction member 430Y no longer exists, the second driving member 422Y can automatically reset under the reset force of the second reset member 440Y and drive the second sliding sleeve 421Y to reset to disengage from the second locking member 410Y, and the second locking member 410Y can automatically move to the second locking position under the reset force of the fifth reset member.

[0159] The folding process of the stroller frame 1000Y will be briefly described below in conjunction with the relevant diagrams.

[0160] Please refer to Figure 16 , Figure 17 , Figure 19 and Figure 20 . In this embodiment, when the stroller frame 1000Y is in the unfolded state, the second locking member 410Y is in the second locking position and extends into the first recess of the third transmission member 260Y to restrict the third transmission member 260Y and the rider frame 100Y from rotating relative to the first transmission member 230Y about the first pivot point A1, and at the same time restrict the third transmission member 260Y from rotating relative to the first transmission member 230Y. In this way, a fixed four-bar linkage structure can be formed between the first transmission member 230Y, the third transmission member 260Y, the armrest member 240Y, and the rear wheel frame 220Y. The second transmission member 250Y can also be stably supported between the front wheel frame 210Y and the rear wheel frame 220Y to keep the stroller frame 1000Y in the unfolded state. Specifically, the rods between the sixth pivot point A6, the second pivot point A2, the third pivot point A3, and the first pivot point A1 (or the fifth pivot point A5) form a four-bar linkage structure, and the adjacent and connected two linkages are relatively fixed to each other.

[0161] When it is necessary to switch the stroller frame 1000Y from the unfolded state to the folded state, the second locking member 410Y is driven to move to the second unlocking position so that the second locking member 410Y withdraws from the first recess of the third transmission member 260Y. In this way, both the rider frame 100Y and the third transmission member 260Y can rotate relative to the first transmission member 230Y about the first pivot point A1 in the counterclockwise direction. When both the rider frame 100Y and the third transmission member 260Y can rotate relative to the first transmission member 230Y, a movable four-bar linkage structure is formed among the armrest member 240Y, the rear wheel frame 220Y, the first transmission member 230Y, and the third transmission member 260Y (or the rider frame 100Y), and the adjacent and connected two linkages can pivot relative to each other. In this way, the folding of the rider frame 100Y relative to the wheel frame 200Y and the folding of the wheel frame 200Y itself (i.e., the relative folding of components such as the front wheel frame 210Y, the rear wheel frame 220Y, and the armrest member 240Y) can be achieved through the movable four-bar linkage structure.

[0162] Specifically, please refer to Figure 19 and Figure 20, during the folding process, when the rider frame 100Y and the third transmission member 260Y can both rotate counterclockwise relative to the first transmission member 230Y about the first pivot point A1, the rider frame 100Y will drive the second end of the first transmission member 230Y to rotate clockwise about the third pivot point A3, and the third transmission member 260Y will simultaneously rotate counterclockwise about the sixth pivot point A6 to drive the armrest member 240Y to rotate clockwise about the second pivot point A2 to approach the rear wheel frame 220Y for folding. In addition, when the third transmission member 260Y rotates about the first pivot point A1 (or the fifth pivot point A5), the third transmission member 260Y will also drive the first end of the second transmission member 250Y to rotate clockwise about the fourth pivot point A4 to pull the front wheel frame 210Y to gradually approach the rear wheel frame 220Y for folding. It should be noted that in this embodiment, as Figure 23 , Figure 26 and Figure 27 show, when the pushcart rider frame 100Y is in the folded state, the second recess on the second transmission member 250Y will be opposite to the second locking member 410Y. When the second driving member 422Y can reset the second sliding sleeve 421Y and separate it from the second locking member 410Y under the action of the second restoring member 440Y, thus, the second locking member 410Y can move to the second locking position under the elastic restoring force of the fifth restoring member to extend into the second recess for locking to limit the unfolding of the pushcart frame 1000Y.

[0163] In order to improve the convenience of the unlocking, commutation locking mechanism 300Y and the folding locking mechanism 400Y for the user, in some embodiments provided by the present invention, the unlocking mechanism 500Y can perform unlocking operations on the commutation locking mechanism 300Y and the folding locking mechanism 400Y respectively. Specifically, the unlocking mechanism 500Y can be respectively drivingly connected to the commutation locking mechanism 300Y and the folding locking mechanism 400Y to allow the rider frame 100Y to rotate relative to the wheel frame 200Y for commutation operation or folding operation. Specifically, as Figure 16 and Figure 17 show, the unlocking mechanism 500Y is arranged on the rider frame 100Y. More specifically, it is arranged on the push handle tube 120Y of the rider frame 100Y, so that it is convenient for the user to operate. Of course, in other embodiments, the unlocking mechanism 500Y can also be arranged on the support rod or the wheel frame 200Y, and no specific limitation is made here.

[0164] Please refer to Figure 16 , Figure 21 and Figure 28, in one embodiment, the unlocking mechanism 500Y includes a first unlocking member 510Y, a second unlocking member 520Y, and an operating member 530Y. Among them, the first unlocking member 510Y is rotatably disposed on the vehicle frame 100Y and is drivingly connected to the reversing locking mechanism 300Y to allow the vehicle frame 100Y to rotate relative to the wheel frame 200Y for reversing. Specifically, the first unlocking member 510Y is drivingly connected to the first driving member 340Y in the reversing locking mechanism 300Y. The second unlocking member 520Y is drivingly connected to the second driving member 422Y in the folding locking mechanism 400Y to allow the vehicle frame 100Y to rotate relative to the wheel frame 200Y for folding. Specifically, the second unlocking member 520Y is rotatably disposed on the vehicle frame 100Y and is drivingly connected to the folding locking mechanism 400Y. The operating member 530Y is movably disposed on the vehicle frame 100Y and selectively drives the first unlocking member 510Y or the second unlocking member 520Y to rotate. It should be noted that in other embodiments, the first unlocking member 510Y may also be drivingly connected to the folding locking mechanism 400Y, and the second unlocking member 520Y may be drivingly connected to the reversing locking mechanism 300Y, which is not specifically limited herein.

[0165] Since the first unlocking member 510Y is rotatably arranged on the vehicle frame 100Y and is drivingly connected to the first driving member 340Y, the second unlocking member 520Y is rotatably arranged on the vehicle frame 100Y and is drivingly connected to the second driving member 422Y, and the operating member 530Y is movable and is used to drive either the first unlocking member 510Y or the second unlocking member 520Y to rotate. Therefore, the user can control the rotation of the first unlocking member 510Y by driving the movement of the operating member 530Y, and thereby indirectly control the first driving member 340Y and the first locking member 310Y in the folding and locking mechanism 400Y. When the first locking member 310Y is in the first locking position, the locking portion 311Y of the first locking member 310Y is engaged and locked with the locking portion 301Y of the first engaging member 320Y or the second engaging member 330Y, and the vehicle frame 100Y can be maintained in the first use position or the second use position. When the first locking member 310Y is in the first unlocking position, the locking portion 311Y of the first locking member 310Y disengages from the locking portion 301Y of the first engaging member 320Y or the second engaging member 330Y to release the lock, and the vehicle frame 100Y can freely switch between the first use position and the second use position. At the same time, the user can also control the rotation of the second unlocking member 520Y by driving the movement of the operating member 530Y, and thereby indirectly control the second driving assembly 420Y and the second locking member 410Y in the folding and locking mechanism 400Y. When the second locking member 410Y is in the second locking position, the stroller frame 1000Y is restricted from switching between the unfolded state and the folded state, that is, the stroller frame 1000Y can be maintained in the unfolded state or the folded state. When the second locking member 410Y is in the second unlocking position, the stroller frame 1000Y can be allowed to switch between the unfolded state and the folded state. Just because the user only needs to operate the above unlocking mechanism 500Y to separately control different locking mechanisms, thus, the operation convenience of the user is improved.

[0166] Please refer to Figure 21 and 28 to Figure 32, in one embodiment, both the first unlocking member 510Y and the second unlocking member 520Y can be disc-shaped, and both are rotatably mounted on the push handle tube 120Y of the vehicle frame 100Y through a shaft or a pin, etc. Specifically, an installation seat 140Y is provided inside the push handle tube 120Y, and the first unlocking member 510Y and the second unlocking member 520Y are rotatably mounted on the installation seat 140Y. The first unlocking member 510Y is provided with a first connecting portion 511Y, and the first connecting portion 511Y is arranged offset from the rotation center of the first unlocking member 510Y. For example, it can be arranged in a straight line or in a non-linear shape, but not limited thereto. The first connecting portion 511Y is used to connect the reversing locking mechanism 300Y. Specifically, the first connecting portion 511Y is connected to the first driving member 340Y through the first traction member 350Y. When the operating member 530Y drives the first unlocking member 510Y to rotate around its rotation center, the first connecting portion 511Y will rotate synchronously around the rotation center of the first unlocking member 510Y, thereby driving the first traction member 350Y to move to pull the first driving member 340Y to move, and finally driving the first locking member 310Y to be able to move from the first locking position to the first unlocking position. Similarly, the second unlocking member 520Y is provided with a second connecting portion 521Y, and the second connecting portion 521Y is arranged offset from the rotation center of the second unlocking member 520Y. For example, it can be arranged in a straight line or in a non-linear shape, but not limited thereto. The second connecting portion 521Y is used to connect the folding locking mechanism 400Y. Specifically, the second connecting portion 521Y is connected to the second driving assembly 420Y (specifically, the second driving member 422Y) through the second traction member 430Y. Therefore, when the operating member 530Y drives the second unlocking member 520Y to rotate around its rotation center, the second connecting portion 521Y will rotate synchronously around the rotation center of the second unlocking member 520Y, thereby driving the second traction member 430Y to move to pull the second driving assembly 420Y to move, and finally pushing or driving the second locking member 410Y to be able to move from the second locking position to the second unlocking position.

[0167] Specifically, in this embodiment, as Figure 21 and Figure 28 shown, the first traction member 350Y and the second traction member 430Y can both be traction ropes, for example. More specifically, the first unlocking member 510Y is provided with two first connecting portions 511Y, and the second unlocking member 520Y is provided with two second connecting portions 521Y. The two first connecting portions 511Y are respectively connected to the two first traction members 350Y, and the two second connecting portions 521Y are respectively connected to the two second traction members 430Y. In this way, when the first unlocking member 510Y rotates, the two reversing locking mechanisms 300Y can be simultaneously unlocked. When the second unlocking member 520Y rotates, the two folding locking mechanisms 400Y can be simultaneously unlocked.

[0168] Please continue to refer to Figure 21 ,Figures 28 to 32 In one embodiment, the release mechanism 500Y further includes a safety lock 540Y. The safety lock 540Y is movably disposed on the handlebar frame 100Y and can be switched between a first position and a second position. When the safety lock 540Y is in the first position (see Figure 22 ), the operating member 530Y is drivingly connected to the first release member 510Y through the safety lock 540Y. When the safety lock 540Y is in the second position (see Figure 28 ), the operating member 530Y is drivingly connected to the second release member 520Y through the safety lock 540Y. Specifically, when the user needs to release the reversing lock mechanism 300Y to change the use direction of the handle frame 100Y, the safety lock 540Y can be moved to the first position, so that the first release member 510Y can be rotated by operating the operating member 530Y. When the user needs to release the folding lock mechanism 400Y so that the cart frame 100Y can be switched between the unfolded state and the folded state, the safety lock 540Y can be moved to the second position, so that the second release member 520Y can be rotated by operating the operating member 530Y.

[0169] Continue to see Figure 21 , Figures 28 to 32 In one embodiment, the safety lock 540Y includes a first linking member 541Y, a second linking member 542Y and a toggle member 543Y. The first linking member 541Y is drivingly connected to the first release member 510Y; the second linking member 542Y is drivingly connected to the second release member 520Y; the toggle member 543Y is connected to the first linking member 541Y and the second linking member 542Y respectively, and the toggle member 543Y is movably disposed on the handlebar frame 100Y and can be switched between a first position and a second position to drive the first linking member 541Y and the second linking member 542Y to move along the first direction F1. Specifically, when the toggle member 543Y is located at the first position, the operating member 530Y is operated to push the first linking member 541Y to move along the second direction F2 to rotate the first release member 510Y; when the toggle member 543Y is located at the second position, the operating member 530Y is operated to push the second linking member 542Y to move along the second direction F2 to rotate the second release member 520Y, and the first direction F1 intersects with the second direction F2.

[0170] See also Figure 21 , Figures 28 to 32, in one embodiment, the first linkage 541Y has a first abutting portion 5411Y, and the second linkage 542Y has a second abutting portion 5421Y. The operating member 530Y has a first driving portion 531Y and a second driving portion 532Y which are spaced apart. When the toggling member 543Y is in the first position, the first abutting portion 5411Y abuts against the first driving portion 531Y, and the second abutting portion 5421Y is misaligned with the second driving portion 532Y. Thus, when the operating member 530Y moves upward along the second direction F2, the first driving portion 531Y can abut against the first abutting portion 5411Y, thereby pushing the first linkage 541Y to move along the second direction F2, and further driving the first unlocking member 510Y to rotate, finally realizing the unlocking of the commutation locking mechanism 300Y. At the same time, since the second abutting portion 5421Y is misaligned with the second driving portion 532Y, when the operating member 530Y moves upward along the second direction F2, the second driving portion 532Y will not contact the second abutting portion 5421Y, and further enables the second linkage 542Y and the second unlocking member 520Y to remain stationary, that is, when the operating member 530Y is operated, it will not affect the folding locking mechanism 400Y. Similarly, when the toggling member 543Y is in the second position, the second abutting portion 5421Y abuts against the second driving portion 532Y, and the first abutting portion 5411Y is misaligned with the first driving portion 531Y. Thus, when the operating member 530Y moves upward along the second direction F2, the second driving portion 532Y can abut against the second abutting portion 5421Y, thereby pushing the second linkage 542Y to move along the second direction F2, and further driving the second unlocking member 520Y to rotate, finally realizing the unlocking of the folding locking mechanism 400Y. At the same time, since the first abutting portion 5411Y is misaligned with the first driving portion 531Y, when the operating member 530Y moves upward along the second direction F2, the first driving portion 531Y will not contact the first abutting portion 5411Y, and further enables the first linkage 541Y and the first unlocking member 510Y to remain stationary, that is, when the operating member 530Y is operated, it will not affect the folding locking mechanism 400Y.

[0171] Please refer to Figures 29 to 32, in an embodiment, the operating member 530Y further has a third driving portion 533Y and a fourth driving portion 534Y. The third driving portion 533Y and the fourth driving portion 534Y are spaced apart and located between the first driving portion 531Y and the second driving portion 532Y. The first linkage member 541Y and the second linkage member 542Y are spaced apart and a third avoiding portion 544Y is formed therebetween. Specifically, the first linkage member 541Y further has a third abutting portion 5412Y, and the second linkage member 542Y further has a fourth abutting portion 5422Y. When the toggling member 543Y is in the first position, the third abutting portion 5412Y abuts against the third driving portion 533Y, the first abutting portion 5411Y abuts against the first driving portion 531Y, and the fourth driving portion 534Y is located in the third avoiding portion 544Y. Therefore, when the operating member 530Y moves upward along the second direction F2, the first driving portion 531Y can abut against the first abutting portion 5411Y, and the third abutting portion 5412Y can abut against the third driving portion 533Y, so as to simultaneously push the first linkage member 541Y to move along the second direction F2. Meanwhile, when the operating member 530Y moves upward along the second direction F2, the fourth driving portion 534Y gradually inserts into the third avoiding portion 544Y, avoiding the situation of driving the second linkage member 542Y to move when the toggling member 543Y is in the first position. Similarly, when the toggling member 543Y is in the second position, the fourth abutting portion 5422Y abuts against the fourth driving portion 534Y, the second abutting portion 5421Y abuts against the second driving portion 532Y, and the third driving portion 533Y is located in the third avoiding portion 544Y. Therefore, when the operating member 530Y moves upward along the second direction F2, the second driving portion 532Y can abut against the second abutting portion 5421Y, and the fourth abutting portion 5422Y can abut against the fourth driving portion 534Y, so as to simultaneously push the second linkage member 542Y to move along the second direction F2. Meanwhile, when the operating member 530Y moves upward along the second direction F2, the third driving portion 533Y gradually inserts into the third avoiding portion 544Y, avoiding the situation of driving the first linkage member 541Y to move when the toggling member 543Y is in the second position.

[0172] In an embodiment, a first avoiding portion is formed between the first abutting portion 5411Y and the third abutting portion 5412Y. A second avoiding portion is formed between the second abutting portion 5421Y and the fourth abutting portion 5422Y. Specifically, when the toggling member 543Y is in the first position and the operating member 530Y is operated, the second avoiding portion is used to avoid the second driving portion 532Y. When the toggling member 543Y is in the second position and the operating member 530Y is operated, the first avoiding portion is used to avoid the first driving portion 531Y.

[0173] See Figure 21 , Figure 28 and Figure 29In one embodiment, the release mechanism 500Y further includes a third reset member 550Y, which may be an elastic member such as a spring or a shrapnel. The third reset member 550Y abuts between the handlebar frame 100Y (e.g., the push handle tube 120Y) and the toggle member 543Y, and is used to provide an elastic restoring force for the toggle member 543Y, so that the toggle member 543Y is maintained at the first position or the second position. For example, in this embodiment, the third reset member 550Y is used to constantly maintain the toggle member 543Y at the first position. If the reversing locking mechanism 300Y needs to be released, the operating member 530Y can be directly operated (e.g., pressed or pushed upward). If the folding locking mechanism 400Y needs to be released, the toggle member 543Y needs to be moved to the second position first, and then the operating member 530Y needs to be operated. After the folding locking mechanism 400Y is released, the toggle member 543Y is released, and the toggle member 543Y is automatically reset to the first position under the reset action of the third reset member 550Y.

[0174] In one embodiment, one of the first linking member 541Y and the first release member 510Y has a first guide recess (not shown in the figure), and the other has a first mating protrusion (not shown in the figure). The first mating protrusion is slidably disposed in the first guide recess, and the first guide recess extends along the first direction F1. Similarly, one of the second linking member 542Y and the second release member 520Y has a second guide recess (not shown in the figure), and the other has a second mating protrusion (not shown in the figure). The second mating protrusion is slidably disposed in the second guide recess, and the second guide recess extends along the first direction F1. In this way, when the toggle member 543Y switches between the first position and the second position along the first direction F1, it can drive the first linking member 541Y and the second linking member 542Y to move left and right along the first direction F1 at the same time to keep the first release member 510Y and the second release member 520Y stationary; at the same time, when the first linking member 541Y moves up and down along the second direction F2, the first linking member 541Y can also drive the first release member 510Y to rotate; and when the second linking member 542Y moves up and down along the second direction F2, the second linking member 542Y can also drive the second release member 520Y to rotate.

[0175] Please combine Figure 21 , Figure 22 , Figure 28 as well as Figure 32 In one embodiment, the operating member 530Y has an initial position when moving in the second direction F2 (see Figure 21 and Figure 32 ) and unlocked position (see Figure 22 and Figure 28) When the operating member 530Y is in the initial position, the operating member 530Y can be operated to move so as to push the first linkage member 541Y or the second linkage member 542Y to move. In other words, when the operating member 530Y is in the initial position, there may be a gap or just contact between the first driving portion 531Y on the operating member 530Y and the first abutting portion 5411Y, and between the third driving portion 533Y and the third abutting portion 5412Y (or between the second driving portion 532Y and the second abutting portion 5421Y, and between the fourth driving portion 534Y and the fourth abutting portion 5422Y). In this way, the first linkage member 541Y (or the second linkage member 542Y) can be pushed to move upward by pushing or pressing the operating member 530Y upward. When the operating member 530Y is in the unlocking position, the operating member 530Y pushes the first linkage member 541Y or the second linkage member 542Y.

[0176] Specifically, as Figure 21 , Figure 22 , Figure 28 and Figure 32 shown, when the toggling member 543Y is in the first position and the operating member 530Y is in the initial position, there may be a gap or just contact between the first driving portion 531Y and the first abutting portion 5411Y, and between the third driving portion 533Y and the third abutting portion 5412Y. At this time, the operating member 530Y can be pushed or pressed upward to move to the unlocking position, and during this process, the first linkage member 541Y is pushed, so that the first linkage member 541Y drives the first unlocking member 510Y to rotate. When the toggling member 543Y is in the second position and the operating member 530Y is in the initial position, there may be a gap or just contact between the second driving portion 532Y and the second abutting portion 5421Y, and between the fourth driving portion 534Y and the fourth abutting portion 5422Y. At this time, the operating member 530Y can be pushed or pressed upward to move to the unlocking position, and during this process, the second linkage member 542Y is pushed, so that the second linkage member 542Y drives the second unlocking member 520Y to rotate.

[0177] Refer to Figure 21 and Figure 29 , in an embodiment, the unlocking mechanism 500Y further includes a fourth reset member 560Y, which may be an elastic member such as a spring or a spring piece. The fourth reset member 560Y abuts between the mounting seat 140Y of the vehicle frame 100Y and the operating member 530Y, and is used to provide an elastic restoring force for the operating member 530Y so that the operating member 530Y remains in the initial position.

[0178] Refer to Figure 21 and Figure 31, in one embodiment, the unlocking mechanism 500Y further includes a first fixed cover 571Y and a second fixed cover 572Y. The first fixed cover 571Y covers the top of the push handle tube 120Y, and the second fixed cover 572Y covers the bottom of the push handle tube 120Y. A through hole for the operating member 530Y to pass through is provided on the second fixed cover 572Y. The first fixed cover 571Y and the second fixed cover 572Y are connected and cooperated with each other and fixed to the push handle tube 120Y. In this way, components such as the operating member 530Y can be limited, preventing the operating member 530Y and the like from detaching from the push handle tube 120Y. In addition, by covering the first fixed cover 571Y and the second fixed cover 572Y outside the first unlocking member 510Y, the second unlocking member 520Y, and the safety lock 540Y, the unlocking mechanism 500Y and the cart frame 1000Y can be simplified and beautified. Specifically, as Figure 21 shown, an operating hole 5711Y is provided on the first fixed cover 571Y, and a pushing portion 5431Y is provided on the toggling member 543Y. The pushing portion 5431Y can pass through the operating hole 5711Y for the user to hold, and the user can change the position of the toggling member 543Y by pushing the pushing portion 5431Y.

[0179] The above-mentioned cart frame 1000Y and its unlocking mechanism 500Y have the following technical effects:

[0180] The above-mentioned cart frame 1000Y includes an unlocking mechanism 500Y. In the above unlocking mechanism 500Y, since the first unlocking member 510Y is rotatably provided on the cart frame 1000Y and is drivingly connected to the reversing locking mechanism 300Y, and the second unlocking member 520Y is rotatably provided on the cart frame 1000Y and is drivingly connected to the folding locking mechanism 400Y, and the operating member 530Y is movable and used to drive either the first unlocking member 510Y or the second unlocking member 520Y to rotate. Among them, the reversing locking mechanism 300Y can allow the cart body frame 100Y to rotate relative to the wheel frame 200Y for reversing, and the folding locking mechanism 400Y can allow the cart body frame 100Y to rotate relative to the wheel frame 200Y for folding. Therefore, the user can control the rotation of the first unlocking member 510Y by driving the movement of the operating member 530Y, and indirectly control the reversing locking mechanism 300Y, so that the cart body frame 100Y of the cart frame 1000Y can be reversed. At the same time, the user can also control the rotation of the second unlocking member 520Y by driving the movement of the operating member 530Y, and indirectly control the folding locking mechanism 400Y, so that the cart frame 1000Y can be switched between the unfolded state and the folded state. It is precisely because the user only needs to operate the above unlocking mechanism 500Y to separately control different locking mechanisms. Thus, the operation convenience of the user is improved.

[0181] Figure 33Shows a stroller frame 1000Z provided according to the first embodiment of the present invention. The overall structure of the stroller frame 1000Z is generally symmetrical left and right, and it can be used as the frame of a baby stroller, a pet stroller, or a cargo stroller, etc. For example, in this embodiment, the stroller frame 1000Z is used as the frame of a baby stroller to elaborate its structure and working principle.

[0182] Please refer to Figure 33 , in one embodiment, the stroller frame 1000Z may include a handle frame 100Z, a wheel frame 200Z, a wheel seat 230Z, and a unlocking mechanism 300Z provided according to one embodiment of the present invention. Since the stroller frame 1000Z has a symmetrical structure, hereinafter, taking one side as an example, while describing the stroller frame 1000Z in detail, the handle frame 100Z, the wheel frame 200Z, the wheel seat 230Z, and the unlocking mechanism 300Z will be described together.

[0183] Please refer to Figures 33 to 36 , in one embodiment, the wheel frame 200Z and the handle frame 100Z are pivotally connected to each other so that the whole stroller frame 1000Z has a folded state (in other embodiments, the folded state can also be referred to as the collapsed state or the folded state) (see Figure 35 ) and an unfolded state (see Figure 33 ). Specifically, the handle frame 100Z includes an upper handle frame 110Z and a lower handle frame 120Z that can move relative to each other. The end of the lower handle frame 120Z away from the upper handle frame 110Z is pivotally connected to the wheel frame 200Z. The wheel frame 200Z includes a pivotally connected front wheel frame 210Z and a rear wheel frame 220Z. Among them, the lower handle frame 120Z, the front wheel frame 210Z, and the rear wheel frame 220Z can be pivotally connected through a first pivot seat 400Z. When the stroller frame 1000Z switches from the unfolded state to the folded state, the front wheel frame 210Z pivots around the first pivot seat 400Z to approach the rear wheel frame 220Z, and the lower handle frame 120Z pivots around the first pivot seat 400Z to approach the rear wheel frame 220Z. When the stroller frame 1000Z switches from the folded state to the unfolded state, the front wheel frame 210Z pivots around the first pivot seat 400Z to move away from the rear wheel frame 220Z, and the lower handle frame 120Z pivots around the first pivot seat 400Z to move away from the rear wheel frame 220Z. Specifically, when the stroller frame 1000Z is in the unfolded state, a first included angle α1 is formed between the front wheel frame 210Z and the rear wheel frame 220Z, and a second included angle α2 is formed between the lower handle frame 120Z and the rear wheel frame 220Z. When the stroller frame 1000Z is in the folded state, a third included angle α3 is formed between the front wheel frame 210Z and the rear wheel frame 220Z, and a fourth included angle α4 is formed between the lower handle frame 120Z and the rear wheel frame 220Z. Among them, α1 > α3, α2 > α4 (combining Figure 34 and Figure 35)。Of course, in other embodiments, the lower carriage frame 120Z can also be directly pivotally connected to the front wheel frame 210Z or the rear wheel frame 220Z. The specific structures of the wheel frames 200Z (including the front wheel frame 210Z and the rear wheel frame 220Z) and the carriage frames 100Z (including the upper carriage frame 110Z and the lower carriage frame 120Z) will be further elaborated one by one below.

[0184] Please refer to Figure 33 , in one embodiment, the front wheel frame 210Z has a U-shaped structure, for example, and includes front rods 211Z located on the left and right sides and a front cross bar 212Z connected between the two front rods 211Z. The front cross bar 212Z extends substantially along the first direction F1, which is equivalent to the left-right direction. When the stroller frame 1000Z is used as the frame of a baby stroller, the front cross bar 212Z can also be used as a footrest.

[0185] In one embodiment, at least one wheel seat 230Z (which can be referred to as the front wheel seat 230ZA here) is installed at the bottom of the front wheel frame 210Z. Specifically, in this embodiment, as Figure 33 shown, two front wheel seats 230ZA are installed at the bottom of the front wheel frame 210Z, and the two front wheel seats 230ZA are spaced apart in the left-right direction (i.e., the first direction F1). More specifically, the two front wheel seats 230ZA are fixedly installed at the left and right ends of the front cross bar 212Z, and each front wheel seat 230ZA is respectively used to install a wheel 240Z (which can be referred to as the front wheel 240ZA here). Of course, in another alternative embodiment, the front wheel frame 210Z can also have other implementation manners. For example, the front wheel frame 210Z only includes two front rods 211Z, and one end of the two front rods 211Z is connected to form a V-shaped structure, and a front wheel seat 230ZA can be installed in the middle at the bottom of the front wheel frame 210Z. Or, for example, the front wheel frame 210Z only includes two front rods 211Z arranged substantially parallel to each other in the left-right direction, and the two front wheel seats 230ZA are respectively connected to the two front rods 211Z.

[0186] It should be noted that unless otherwise clearly specified and limited, the "left", "right" and other orientation terms related to the stroller frame 1000Z in each embodiment of the present invention are based on the "left" and "right" orientations of the stroller frame 1000Z during normal driving, and the "left" and "right" are schematically shown by arrows L and R in the figure. These orientation terms are only used to make the description of the embodiments of the present invention clearer and are not used to improperly limit the protection scope of the present invention.

[0187] Please continue to refer to Figure 33, in one embodiment, the rear wheel frame 220Z can also be a U-shaped structure, for example. It includes two rear rods 221Z located on the left and right sides and a rear crossbar 222Z connected between the two rear rods 221Z. The rear crossbar 222Z extends along the first direction F1. At least one wheel seat 230Z (which can be called the rear wheel seat 230BZ here) is also installed at the bottom of the rear wheel frame 220Z. In this embodiment, two rear wheel seats 230BZ are installed at the bottom of the rear wheel frame 220Z, and the two rear wheel seats 230BZ are spaced apart in the left-right direction (i.e., the first direction F1). More specifically, the two rear wheel seats 230BZ are respectively connected to the rear rods 221Z on the same side, and each rear wheel seat 230BZ is respectively used to install a wheel 240Z (which can be called the rear wheel 240BZ here). Specifically, the rear wheel seat 230BZ is connected to the rear wheel 240BZ, and the rear wheel seat 230BZ is rotatably connected to the rear wheel frame 220Z (specifically, the rear rod 221Z on the same side) through a connecting shaft. Of course, in another alternative embodiment, the rear wheel frame 220Z can have other embodiments. For example, the rear wheel frame 220Z only includes two rear rods 221Z, and one end of the two rear rods 221Z is connected to form a V-shaped structure. A rear wheel seat 230BZ can be installed in the middle at the bottom of the rear wheel frame 220Z. Or, for example, the rear wheel frame 220Z only includes two rear rods 221Z arranged in parallel in the left-right direction, and the two rear wheel seats 230BZ are respectively connected to the two rear rods 221Z.

[0188] Please refer to Figure 33 and Figure 34 , in one embodiment, the cart frame 1000Z further includes a wheel locking mechanism 500Z. The wheel locking mechanism 500Z is arranged between the wheel frame 200Z and the wheel seat 230Z, and the wheel locking mechanism 500Z is used to restrict or allow the wheel seat 230Z to rotate relative to the wheel frame 200Z. Specifically, in this embodiment, as Figure 34 shown, the wheel locking mechanism 500Z is arranged between the rear wheel frame 220Z and the rear wheel seat 230BZ and is used to restrict or allow the rear wheel seat 230BZ to rotate relative to the rear wheel frame 220Z. When the rear wheel seat 230BZ is fixed relative to the rear wheel frame 220Z, the rear wheel 240BZ is fixed relative to the rear wheel frame 220Z, and the steering of the cart frame 1000Z is locked. The cart frame 1000Z can move forward or backward in a straight line. When the rear wheel seat 230BZ is rotatable relative to the rear wheel frame 220Z, the rear wheel 240BZ can rotate relative to the rear wheel frame 220Z. In this way, the cart frame 1000Z can perform a steering drift operation, improving the flexibility of the movement of the cart frame 1000Z.

[0189] Please refer to Figure 34, in one embodiment, the wheel locking mechanism 500Z includes a first locking member 510Z and a first locking recess 520Z. Among them, the wheel seat 230Z (specifically the rear wheel seat 230BZ) is provided with the first locking recess 520Z, that is, the first locking recess 520Z is arranged on the wheel seat 230Z; the first locking member 510Z is movably arranged on the wheel frame 200Z (specifically the rear wheel frame 220Z) and is adapted to be locked and cooperate with the first locking recess 520Z. Specifically, when the first locking member 510Z extends into the first locking recess 520Z to be locked and cooperate with the first locking recess 520Z, the wheel seat 230Z (specifically the rear wheel seat 230BZ) is restricted from rotating relative to the wheel frame 200Z (specifically the rear wheel frame 220Z), thereby restricting the drift steering of the stroller frame 1000Z. When the first locking member 510Z retreats from the first locking recess 520Z to release the locking cooperation with the first locking recess 520Z, the wheel seat 230Z (specifically the rear wheel seat 230BZ) is allowed to rotate relative to the wheel frame 200Z (specifically the rear wheel frame 220Z), thereby allowing the stroller frame 1000Z to drift and steer.

[0190] Please continue to refer to Figure 34 , in one embodiment, the wheel locking mechanism 500Z further includes a second reset member 530Z. The second reset member 530Z abuts between the rear wheel frame 220Z and the first locking member 510Z and is used to provide an elastic restoring force for the first locking member 510Z, so that the first locking member 510Z constantly has a tendency to extend into the first locking recess 520Z. The second reset member 530Z can be an elastic component such as a spring or a spring piece.

[0191] It should be noted that in this embodiment, in order to further improve the steering flexibility of the stroller frame 1000Z, the stroller frame 1000Z is provided with two wheel locking mechanisms 500Z, and one of the above-mentioned wheel locking mechanisms 500Z is arranged between the rear rod member 221Z and the rear wheel seat 230BZ on the same side.

[0192] Refer to Figure 33 and Figure 34, in one embodiment, the upper handrail 110Z can move relative to the lower handrail 120Z. For example, the upper handrail 110Z can be slidably sleeved with the lower handrail 120Z. In this way, the overall height of the handrail 100Z of the stroller frame 1000Z relative to the ground when the stroller frame 1000Z is in the unfolded state can be adjusted to facilitate users of different heights to hold, improving the applicability of the stroller frame 1000Z. In one embodiment, the upper handrail 110Z is, for example, in a U-shaped structure, which includes two first support tubes 111Z and a push handle tube 112Z connected between the two first support tubes 111Z. The first support tube 111Z is a straight tube, and the push handle tube 112Z is in a U-shaped structure and connected between the two first support tubes 111Z for users to hold to push the stroller frame 1000Z. More specifically, the lower handrail 120Z, for example, includes two second support tubes 121Z. The upper ends of the two second support tubes 121Z are, for example, respectively slidably sleeved with the lower ends of the first support tubes 111Z on the same side, and the lower ends of the two second support tubes 121Z are, for example, respectively pivotally connected to the first pivot seats 400Z on the same side. It should be noted that the two second support tubes 121Z being respectively slidably sleeved with the first support tubes 111Z on the same side includes two implementation manners: the second support tube 121Z is sleeved outside the first support tube 111Z; or the first support tube 111Z is sleeved outside the second support tube 121Z. Specifically, in this embodiment, the cooperation principle between the two is specifically described by taking the second support tube 121Z being sleeved outside the first support tube 111Z as an example. In addition, it should also be noted that the above-mentioned "overall height of the handrail 100Z relative to the ground" can be regarded as referring to the height of the push handle tube 112Z approximately along the vertical direction from the ground.

[0193] To enable the handrail 100Z to stably maintain at the required height, that is, to prevent the upper handrail 110Z from sliding relative to the lower handrail 120Z at will, in one embodiment, as Figure 34 shown, the handrail 100Z further includes a height adjustment locking mechanism 130Z. The height adjustment locking mechanism 130Z is arranged between the upper handrail 110Z and the lower handrail 120Z. The upper handrail 110Z and the lower handrail 120Z can limit or allow relative movement between the two through the height adjustment locking mechanism 130Z. Specifically, the height adjustment locking mechanism 130Z has a locked state and an unlocked state. When the height adjustment locking mechanism 130Z is in the locked state, the upper handrail 110Z is fixed relative to the lower handrail 120Z, and the two cannot slide relative to each other. When the height adjustment locking mechanism 130Z is in the unlocked state, the upper handrail 110Z can slide relative to the lower handrail 120Z.

[0194] Please refer to Figure 34, in one embodiment, the height adjustment locking mechanism 130Z includes a second locking component 131Z and a second locking mating part 133Z. Among them, the second locking mating part 133Z is arranged on the lower frame 120Z, and the second locking component 131Z is movably arranged on the upper frame 110Z and is adapted to be locked and mated with the second locking mating part 133Z. Specifically, when the second locking component 131Z extends into the second locking mating part 133Z for locking and mating, the upper frame 110Z is restricted from sliding relative to the lower frame 120Z. When the second locking component 131Z withdraws from the second locking mating part 133Z to release the mating, the upper frame 110Z is allowed to slide relative to the lower frame 120Z.

[0195] In this embodiment, the second locking component 131Z includes a second locking member 1311Z. Specifically, the second locking member 1311Z is arranged inside the upper frame 110Z and can move relative to the upper frame 110Z and the lower frame 120Z to have a locking position and an unlocking position. More specifically, the height adjustment locking mechanism 130Z further includes a first locking mating part 131, and the first locking mating part 132Z is arranged on the upper frame 110Z. When the second locking member 1311Z is in the locking position, the second locking member 1311Z is locked and mated with the first locking mating part 132Z and the second locking mating part 133Z to restrict the upper frame 110Z from sliding relative to the lower frame 120Z. At this time, the height adjustment locking mechanism 130Z is in the locked state, so that the overall height of the frame 100Z relative to the ground is fixed. When the second locking member 1311Z is in the unlocking position, the second locking member 1311Z releases the locking of the first locking mating part 132Z and the second locking mating part 133Z to allow the upper frame 110Z to slide relative to the lower frame 120Z. At this time, the height adjustment locking mechanism 130Z is in the unlocked state, so that the overall height of the frame 100Z can be adjusted to adapt to users of different heights to hold the frame 100Z. It should be noted that in this embodiment, the first locking mating part 132Z is a slot structure arranged on the first support pipe 111Z in the upper frame 110Z, and the second locking mating part 133Z is a slot structure arranged on the second support pipe 121Z in the lower frame 120Z. When the second locking member 1311Z is in the locking position, the second locking member 1311Z passes through the first locking mating part 132Z and the second locking mating part 133Z to be locked and mated with both. When the second locking member 1311Z is in the unlocking position, the second locking member 1311Z withdraws from the second locking mating part 133Z to release the locking of the second locking mating part 133Z.

[0196] In one embodiment, a plurality of (such as two, three or more) second locking parts 133Z are provided, and the plurality of second locking parts 133Z are arranged at intervals along the sliding direction of the upper frame 110Z relative to the lower frame 120Z. Specifically, the plurality of second locking parts 133Z can be regarded as being arranged at intervals along the length direction of the second support pipe 121Z. When the second locking member 1311Z passes through the first locking part 132Z and is respectively inserted and matched with different second locking parts 133Z, correspondingly, the overall length of the frame 100Z is different, and correspondingly, the height of the frame 100Z relative to the ground is different, so as to adapt to users of different heights to hold. Specifically, please refer to Figure 34 and Figure 44 , in this embodiment, three second locking parts 133Z are provided, and the three second locking parts 133Z can be respectively called a bottom second locking part 1331Z, a middle second locking part 1332Z and a top second locking part 1333Z. Among them, the middle second locking part 1332Z is located between the bottom second locking part 1331Z and the top second locking part 1333Z, and the bottom second locking part 1331Z is closer to the bottom end of the second support pipe 121Z than the top second locking part 1333Z. When the second locking member 1311Z passes through the first locking part 132Z and is inserted into the bottom second locking part 1331Z, the length of the frame 100Z is L1, and the height of the push pipe 112Z from the ground is H1; when the second locking member 1311Z passes through the first locking part 132Z and is inserted into the middle second locking part 1332Z, the length of the frame 100Z is L2, and the height of the push pipe 112Z from the ground is H2; when the second locking member 1311Z passes through the first locking part 132Z and is inserted into the top second locking part 1333Z, the length of the frame 100Z is L3, and the height of the push pipe 112Z from the ground is H3; among them, L1 < L2 < L3, H1 < H2 < H3.

[0197] Please continue to refer to [[ID=27 , in one embodiment, the second locking assembly 131Z further includes a driving member 1312Z, and the driving member 1312Z is movable relative to the upper frame 110Z and is operably connected to the second locking member 1311Z. Specifically, the driving member 1312Z has a locking position and an unlocking position on its moving path. When the driving member 1312Z is in the locking position, the driving member 1312Z drives the second locking member 1311Z to be in the locking position. When the driving member 1312Z is in the unlocking position, the driving member 1312Z drives the second locking member 1311Z to be in the unlocking position. In this way, the user can indirectly control the position of the second locking member 1311Z by directly controlling the position of the driving member 1312Z, and further control the state of the height adjustment locking mechanism 130Z. In this embodiment, the moving direction of the driving member 1312Z is substantially the same as the length direction of the first support pipe 111Z.

[0198] Refer again to ​ , in one embodiment, the height adjustment locking mechanism 130Z further includes a support base 136Z and a guide member (not shown in the figure). Specifically, the support base 136Z is disposed on the upper frame 110Z and has a first guiding portion 1361Z. The extending direction of the first guiding portion 1361Z is perpendicular to the moving direction of the driving member 1312Z. The second locking member 1311Z is movably disposed on the support base 136Z. The guide member passes through the second locking member 1311Z and extends into the first guiding portion 1361Z. More specifically, the driving member 1312Z is provided with a second guiding portion (not shown in the figure). The second guiding portion extends obliquely with respect to the moving direction of the driving member 1312Z. The guide member can extend into the second guiding portion and slidably cooperate with the second guiding portion. When the driving member 1312Z switches between the locking position and the unlocking position, through the cooperation of the guide member with the first guiding portion 1361Z and the second guiding portion, the second locking member 1311Z can switch between the locking position and the unlocking position. It should be noted that, in this embodiment, the guide member can be, for example, a component such as a pin. Of course, in other embodiments, the above-mentioned second locking member 1311Z and the guide member can also be an integrally formed structure. The guide member can be regarded as a part of the second locking member 1311Z. For example, the guide member is a convex column integrally formed on the second locking member 1311Z, which is mainly used to pass through the first guiding portion 1361Z and the second guiding portion to guide the second locking member 1311Z to switch between the locking position and the unlocking position. It should also be noted that, in this embodiment, both the first guiding portion 1361Z and the second guiding portion are through-hole structures.

[0199] In one embodiment, the height adjustment locking mechanism 130Z further includes a third return member 135Z (see ​ ), and the third return member 135Z can be, for example, an elastic member such as a spring or a spring piece. Specifically, the third return member 135Z is a compression spring, which abuts between the support base 136Z and the driving member 1312Z and is used to provide an elastic restoring force for the driving member 1312Z so that the driving member 1312Z can be kept in the locking position. In this way, the second locking member 1311Z can be kept in the locking position.

[0200] It should be noted that, in this embodiment, in order to improve the stability when the upper frame 110Z is fixed relative to the lower frame 120Z, the frame 100Z includes two height adjustment locking mechanisms 130Z. Specifically, one of the above-mentioned height adjustment locking mechanisms 130Z is provided between the first support pipe 111Z and the second support pipe 121Z on the same side.

[0201] Please refer to ​ , in one embodiment, the upper frame 110Z slides relative to the lower frame 120Z so that the whole frame 100Z has an extended state (see​ ) and a collapsed state (in other embodiments, the collapsed state may also be referred to as a folded-up state or a folded state, etc.) (see ​ ). Specifically, the length of the rider frame 100Z in the extended state is greater than the length of the rider frame 100Z in the collapsed state. During the process of the stroller frame 1000Z switching to the folded-up state, the rider frame 100Z can be first placed in the collapsed state, so that the volume of the stroller frame 1000Z in the folded-up state can be further reduced. In this embodiment, when the second locking member 1311Z passes through the first locking portion 132Z and is locked and engaged with the bottom second locking portion 1331Z, the rider vehicle can be regarded as being in the extended state, and at this time, the length of the rider frame 100Z is the shortest and is L1. When the second locking member 1311Z retreats from the second locking portion 133Z to release the locking of the second locking portion 133Z, the upper rider frame 110Z can slide relative to the lower rider frame 120Z to allow the rider frame 100Z to switch to the collapsed state. When the rider frame 100Z is in the collapsed state, the length of the rider frame 100Z at this time is L0, and L0 < L1.

[0202] Please refer to ​ and ​ , in one embodiment, the stroller frame 1000Z further includes a rider folding locking mechanism 600Z, and the rider folding locking mechanism 600Z is disposed on the rider frame 100Z and is adapted to lock the rider frame 100Z in the collapsed state. Specifically, the rider folding locking mechanism 600Z includes an engaging member 610Z and a second locking recess 620Z. One of the upper rider frame 110Z and the lower rider frame 120Z is provided with the second locking recess 620Z, and the other is provided with a movable engaging member 610Z. In other words, the second locking recess 620Z is provided in one of the upper rider frame 110Z and the lower rider frame 120Z, and the engaging member 610Z is movably disposed on the other of them. In this way, the rider frame 100Z can be restricted or allowed to switch between the collapsed state and the extended state by the engagement or disengagement of the engaging member 610Z and the second locking recess 620Z. Specifically, when the engaging member 610Z is engaged with the second locking recess 620Z, the rider frame 100Z is locked in the collapsed state, so that during the transfer or storage of the stroller frame 1000Z, the upper rider frame 110Z can be prevented from accidentally sliding relative to the lower rider frame 120Z, thereby avoiding an increase in the overall volume of the stroller frame 1000Z and making it inconvenient to transfer or store. When the engaging member 610Z disengages from the second locking recess 620Z, the rider frame 100Z is allowed to switch to the extended state.

[0203] Please continue to refer to ​ and ​, in this embodiment, the support base 136Z is provided with a second locking recess 620Z. The lower frame 120Z is provided with a perforation (not shown in the figure), and the engaging member 610Z is movably inserted through the perforation so that the engaging member 610Z can engage with the second locking recess 620Z. Specifically, the rider folding locking mechanism 600Z further includes a fixed base 630Z and a first reset member 640. The fixed base 630Z is disposed on the lower frame 120Z, and the first reset member 640 is disposed between the fixed base 630Z and the engaging member 610Z and is used to provide an elastic restoring force for the engaging member 610Z so that the engaging member 610Z constantly has a tendency to extend into the second locking recess 620Z for engagement. The first reset member 640 can be an elastic component such as a spring or a spring piece. Specifically, in this embodiment, the first reset member 640 is a compression spring, and its two ends abut between the engaging member 610Z and the fixed base 630Z.

[0204] Please refer to ​ and ​ , in an embodiment, the support base 136Z is provided with a first pushing slope 1363Z and a second pushing slope 1364Z. When the rider frame 100Z switches from the extended state to the folded state, the first pushing slope 1363Z pushes the engaging member 610Z to guide the engaging member 610Z to insert into the second locking recess 620Z for engagement. The second pushing slope 1364Z is formed on the side wall of the second locking recess 620Z. When the rider frame 100Z switches from the folded state to the extended state, the second pushing slope 1364Z pushes the engaging member 610Z to guide the engaging member 610Z to withdraw from the second locking recess 620Z.

[0205] Next, in conjunction with ​ and ​ , briefly describe the process of adjusting the height of the rider frame 100Z and the process of switching the rider frame 100Z between the extended state and the folded state.

[0206] Please refer to ​ , in this embodiment, when the rider frame 100Z is in the extended state and it is necessary to adjust the height of the rider frame 100Z relative to the ground, the user can first drive the second locking member 1311Z to withdraw from the second locking portion 133Z through the driving member 1312Z. In this way, the upper frame 110Z can slide freely relative to the lower frame 120Z for height adjustment. After the height of the rider frame 100Z is adjusted in place, the third reset member 135Z drives the driving member 1312Z to reset to the locking position to drive the second locking member 1311Z to pass through the first locking portion 132Z again and extend into the second locking portion 133Z. In this way, the upper frame 110Z is restricted from sliding relative to the lower frame 120Z so that the rider frame 100Z is maintained at the required height.

[0207] Please combine ​ and​ When the user needs to switch the bicycle frame 100Z from the extended state to the folded state (from ​ to ​ switching), similarly, the user can first drive the second locking member 1311Z away from the second locking portion 133Z by the driving member 1312Z; subsequently, the user can push the upper bicycle frame 110Z so that the upper bicycle frame 110Z moves toward the direction close to the bottom of the lower bicycle frame 120Z (i.e., the bottom end of the second support tube 121Z). In this way, the overall length of the bicycle frame 100Z can be reduced to switch to the folded state. During the movement, the first pushing inclined surface 1363Z on the support seat 136Z will abut against the engaging member 610Z, and as the upper bicycle frame 110Z moves, it will push the engaging member 610Z to gradually move away from the through hole. At this time, the first reset member 640 is compressed. When the engaging member 610Z crosses the first pushing inclined surface 1363Z and is aligned with the second locking recess 620Z, the first reset member 640 resets and pushes the engaging member 610Z through the through hole to extend into the second locking recess 620Z. In this way, the engaging member 610Z can be engaged with the second locking recess 620Z to limit the sliding of the upper bicycle frame 110Z relative to the lower bicycle frame 120Z.

[0208] Please continue to refer to ​ and ​ When the user needs to switch the bicycle frame 100Z from the folded state to the extended state (from ​ to ​ switching), the user can directly pull the upper bicycle frame 110Z so that the upper bicycle frame 110Z moves toward the direction away from the bottom of the lower bicycle frame 120Z. In this way, the overall length of the bicycle frame 100Z can be extended to switch to the extended state. During the process of applying a pulling force to the upper bicycle frame 110Z, the second pushing inclined surface 1364Z will push the engaging member 610Z so that the engaging member 610Z gradually moves away from the second locking recess 620Z. During this process, the first reset member 640 is gradually compressed. When the engaging member 610Z disengages from the second locking recess 620Z, the upper bicycle frame 110Z is allowed to slide relative to the lower bicycle frame 120Z to switch to the extended state.

[0209] Please refer to ​ and ​ In an embodiment, an abutting member 140Z is provided inside the lower bicycle frame 120Z. The abutting member 140Z is generally located near the bottom end of the second support tube 121Z and is used to abut against the support seat 136Z to limit the sliding stroke of the upper bicycle frame 110Z. When the bicycle frame 100Z is in the folded state, the support seat 136Z abuts against the abutting member 140Z.

[0210] To improve the convenience for users to unlock the wheel locking mechanism 500Z and the height adjustment locking mechanism 130Z, the unlocking mechanism 300Z in an embodiment provided by the present invention can perform unlocking operations on the wheel locking mechanism 500Z and the height adjustment locking mechanism 130Z respectively. Specifically, the unlocking mechanism 300Z can be drivingly connected to the wheel locking mechanism 500Z and the height adjustment locking mechanism 130Z respectively, so as to allow the wheel seat 230Z to rotate relative to the wheel frame 200Z to enable the pushcart frame 1000Z to have a drifting steering function, and at the same time, allow the upper handlebar frame 110Z to move relative to the lower handlebar frame 120Z to change the height of the handlebar frame 100Z relative to the ground. Specifically, as ​ shown, the unlocking mechanism 300Z is arranged on the handlebar frame 100Z. More specifically, it is arranged on the push handle tube 112Z of the upper handlebar frame 110Z, so that it is convenient for users to operate. Of course, in other embodiments, the unlocking mechanism 300Z can also be arranged on the first support tube 111Z, or the lower handlebar frame 120Z, or the wheel frame 200Z, and no specific limitation is made here.

[0211] Please refer to ​ and ​ , in an embodiment, the unlocking mechanism 300Z includes a first unlocking member 310Z, a second unlocking member 320Z, and an operating member 330Z. Among them, the first unlocking member 310Z is rotatably arranged on the handlebar frame 100Z and is drivingly connected to the wheel locking mechanism 500Z to allow the wheel seat 230Z to rotate relative to the wheel frame 200Z for drifting steering. Specifically, the first unlocking member 310Z is drivingly connected to the first locking member 510Z in the wheel locking mechanism 500Z. The second unlocking member 320Z is rotatably arranged on the handlebar frame 100Z and is drivingly connected to the height adjustment locking mechanism 130Z to allow the upper handlebar frame 110Z to move relative to the lower handlebar frame 120Z. Specifically, the second unlocking member 320Z is drivingly connected to the driving member 1312Z in the height adjustment locking mechanism 130Z. The operating member 330Z is movably arranged on the handlebar frame 100Z and selectively drives the first unlocking member 310Z or the second unlocking member 320Z to rotate. It should be noted that in other embodiments, the first unlocking member 310Z can also be drivingly connected to the height adjustment locking mechanism 130Z, and the second unlocking member 320Z can be drivingly connected to the wheel locking mechanism 500Z, and no specific limitation is made here.

[0212] Since the first unlocking member 310Z is rotatably provided on the cart frame 100Z and is drivingly connected to the first locking member 510Z, the second unlocking member 320Z is rotatably provided on the cart frame 100Z and is drivingly connected to the driving member 1312Z, and the operating member 330Z is movable and is used to drive either the first unlocking member 310Z or the second unlocking member 320Z to rotate. Therefore, the user can control the rotation of the first unlocking member 310Z by driving the movement of the operating member 330Z, and further indirectly control the first locking member 510Z in the wheel locking mechanism 500Z. When the first locking member 510Z extends into the first locking recess 520Z for locking cooperation, the wheel seat 230Z is restricted from rotating relative to the wheel frame 200Z, and the cart frame 1000Z can travel in a straight line. When the first locking member 510Z retreats from the first locking recess 520Z to release the cooperation, the wheel seat 230Z is allowed to rotate relative to the wheel frame 200Z, and the cart frame 1000Z can perform drifting steering. At the same time, the user can also control the rotation of the second unlocking member 320Z by driving the movement of the operating member 330Z, and further indirectly control the second locking assembly 131Z (i.e., the driving member 1312Z and the second locking member 1311Z) in the height adjustment locking mechanism 130Z. Specifically, when the driving member 1312Z is in the locking position, the second locking member 1311Z is correspondingly in the locking position, and the second locking member 1311Z is locked and cooperated with the first locking portion 132Z and the second locking portion 133Z, so that the upper cart frame 110Z is restricted from moving relative to the lower cart frame 120Z. When the driving member 1312Z is in the unlocking position, the second locking member 1311Z is correspondingly in the unlocking position, and the second locking member 1311Z is unlocked from the first locking portion 132Z and the second locking portion 133Z, so that the upper cart frame 110Z can move relative to the lower cart frame 120Z. It is precisely because the user only needs to operate the above unlocking mechanism 300Z to respectively control different locking mechanisms, thus improving the operation convenience of the user.

[0213] Please refer to ​ , in an embodiment, both the first unlocking member 310Z and the second unlocking member 320Z can be in a disc shape, and the two are rotatably mounted on the push handle tube 112Z of the cart frame 100Z through a shaft or a pin, etc. Specifically, an installation seat 340Z is provided in the push handle tube 112Z, and the first unlocking member 310Z and the second unlocking member 320Z are rotatably mounted on the installation seat 340Z.

[0214] Please combine ​ and ​, in one embodiment, a first unlocking member 310Z is provided with a first connecting portion 311Z. The first connecting portion 311Z is arranged offset from the rotation center of the first unlocking member 310Z. For example, it can be arranged in a straight line or in a non-linear shape, but it is not limited thereto. The first connecting portion 311Z is used to connect the wheel locking mechanism 500Z. In this embodiment, the wheel locking mechanism 500Z further includes a first traction member 540Z. The first traction member 540Z is disposed within the wheel carrier 200Z and the rider frame 100Z and passes through the first pivot seat 400Z and the height adjustment locking mechanism 130Z to be connected between the first unlocking member 310Z and the first locking member 510Z. Specifically, one end of the first traction member 540Z is connected to the first unlocking member 310Z (specifically, the first connecting portion 311Z), and the other end of the first traction member 540Z (i.e., the end away from the first unlocking member 310Z) sequentially passes through the height adjustment locking mechanism 130Z and the first pivot seat 400Z and is connected to the first locking member 510Z provided in the rear wheel carrier 220Z. In this way, the first unlocking member 310Z can drive the first locking member 510Z to retreat from the first locking recess 520Z through the first traction member 540Z. Specifically, please refer to ​ , ​ and ​ . When the operating member 330Z drives the first unlocking member 310Z to rotate about its rotation center, the first connecting portion 311Z will rotate synchronously about the rotation center of the first unlocking member 310Z, thereby driving the first traction member 540Z to move to pull the first locking member 510Z to move to retreat from the first locking recess 520Z.

[0215] As ​ and ​ show, similarly, the second unlocking member 320Z is provided with a second connecting portion 321Z. The second connecting portion 321Z is arranged offset from the rotation center of the second unlocking member 320Z. For example, it can be arranged in a straight line or in a non-linear shape, but it is not limited thereto. The second connecting portion 321Z is used to connect the height adjustment locking mechanism 130Z. Specifically, in this embodiment, the height adjustment locking mechanism 130Z further includes a second traction member 137Z. The second traction member 137Z is disposed within the upper rider frame 110Z and is connected between the second unlocking member 320Z and the second locking assembly 131Z (specifically, the driving member 1312Z). Specifically, please refer to ​ , ​ and ​ . When the operating member 330Z drives the second unlocking member 320Z to rotate about its rotation center, the second connecting portion 321Z will rotate synchronously about the rotation center of the second unlocking member 320Z, thereby driving the second traction member 137Z to move to pull the driving member 1312Z to move, and finally driving the second locking member 1311Z to be able to move from the locking position to the unlocking position.

[0216] Specifically, in this embodiment, as ​ and ​ shown, the first towing member 540Z and the second towing member 137Z can both be towing ropes, for example. More specifically, two first connection portions 311Z are provided on the first unlocking member 310Z, and two second connection portions 321Z are provided on the second unlocking member 320Z. The two first connection portions 311Z are respectively connected to the two first towing members 540Z, and the two second connection portions 321Z are respectively connected to the two second towing members 137Z. In this way, when the first unlocking member 310Z rotates, the unlocking of the two wheel locking mechanisms 500Z can be controlled simultaneously. When the second unlocking member 320Z rotates, the unlocking of the two height adjustment locking mechanisms 130Z can be controlled simultaneously.

[0217] Please refer to ​ , ​ and ​ , in this embodiment, a first through channel 1365Z and a second through channel 1366Z are provided on the support base 136Z. Among them, the first through channel 1365Z is used to accommodate the first towing member 540Z, and the second through channel 1366Z is used to accommodate the second towing member 137Z. In this way, it can be avoided that the first towing member 540Z is entangled with other components when passing through the height adjustment locking mechanism 130Z. Specifically, the first through channel 1365Z is generally a U-shaped channel. The other end of the first towing member 540Z (i.e., the end far from the first unlocking member 310Z) extends into the support base 136Z from one port of the U-shaped channel and then extends out from the other port of the U-shaped channel and extends around the support base 136Z into the first pivot seat 400Z. The first towing member 540Z is wound around the support base 136Z. In this way, it can be prevented that the first towing member 540Z is knotted in the height adjustment locking mechanism 130Z after the height of the rider frame 100Z drops. Specifically, the second through channel 1366Z can generally be a linear channel. When one end of the second towing member 137Z rotates with the second unlocking member 320Z, the other end of the second towing member 137Z can quickly operate through the linear channel to drive the driving member 1312Z to move.

[0218] Refer to ​ , in an embodiment, the unlocking mechanism 300Z further includes a safety lock 350Z. The safety lock 350Z is movably arranged on the rider frame 100Z and can be switched between a first position and a second position. When the safety lock 350Z is in the first position (see Figure 41 ), the operating member 330Z is drivingly connected to the first unlocking member 310Z through the safety lock 350Z. When the safety lock 350Z is in the second position (see Figure 42 ), the operating member 330Z is drivingly connected to the second unlocking member 320Z through the safety lock 350Z. Specifically, as Figure 34 andFigure 41 As shown, when the user needs to release the wheel locking mechanism 500Z so that the cart frame 1000Z has a drift steering function, the safety lock 350Z can be moved to the first position, so that the first release member 310Z can be rotated by operating the operating member 330Z. Figure 34 and Figure 42 As shown, when the user needs to release the height adjustment locking mechanism 130Z to adjust the height of the handlebar frame 100Z or switch the handlebar frame 100Z to the folded state, the safety lock 350Z can be moved to the second position, so that the second release member 320Z can be rotated by operating the operating member 330Z.

[0219] Please continue to see Figures 37 to 40 In one embodiment, the safety lock 350Z includes a first linking member 351Z, a second linking member 352Z and a toggle member 353Z. The first linking member 351Z is drivingly connected to the first release member 310Z; the second linking member 352Z is drivingly connected to the second release member 320Z; the toggle member 353Z is connected to the first linking member 351Z and the second linking member 352Z respectively, and the toggle member 353Z is movably disposed on the handlebar frame 100Z and can be switched between a first position and a second position to drive the first linking member 351Z and the second linking member 352Z to move along the first direction F1. Specifically, when the toggle member 353Z is located at the first position, the operating member 330Z is operated to push the first linking member 351Z to move along the second direction F2 to rotate the first release member 310Z; when the toggle member 353Z is located at the second position, the operating member 330Z is operated to push the second linking member 352Z to move along the second direction F2 to rotate the second release member 320Z, and the first direction F1 intersects with the second direction F2.

[0220] Please combine Figure 34 , Figures 41 to 43, in one embodiment, the first linkage 351Z has a first abutting portion 3511Z, and the second linkage 352Z has a second abutting portion 3521Z. The operating member 330Z has a first driving portion 331Z and a second driving portion 332Z which are spaced apart. When the toggle member 353Z is in the first position, the first abutting portion 3511Z abuts against the first driving portion 331Z, and the second abutting portion 3521Z is misaligned with the second driving portion 332Z. In this way, when the operating member 330Z moves upward along the second direction F2, the first driving portion 331Z can abut against the first abutting portion 3511Z, thereby pushing the first linkage 351Z to move along the second direction F2, and further driving the first unlocking member 310Z to rotate, ultimately realizing the unlocking of the wheel locking mechanism 500Z. At the same time, since the second abutting portion 3521Z is misaligned with the second driving portion 332Z, when the operating member 330Z moves upward along the second direction F2, the second driving portion 332Z will not contact the second abutting portion 3521Z, so that the second linkage 352Z and the second unlocking member 320Z can both remain stationary, that is, when the operating member 330Z is operated, it will not affect the height adjustment locking mechanism 130Z. Similarly, when the toggle member 353Z is in the second position, the second abutting portion 3521Z abuts against the second driving portion 332Z, and the first abutting portion 3511Z is misaligned with the first driving portion 331Z. In this way, when the operating member 330Z moves upward along the second direction F2, the second driving portion 332Z can abut against the second abutting portion 3521Z, thereby pushing the second linkage 352Z to move along the second direction F2, and further driving the second unlocking member 320Z to rotate, ultimately realizing the unlocking of the height adjustment locking mechanism 130Z. At the same time, since the first abutting portion 3511Z is misaligned with the first driving portion 331Z, when the operating member 330Z moves upward along the second direction F2, the first driving portion 331Z will not contact the first abutting portion 3511Z, so that the first linkage 351Z and the first unlocking member 310Z can both remain stationary, that is, when the operating member 330Z is operated, it will not affect the wheel locking mechanism 500Z.

[0221] Please refer to Figure 43, in one embodiment, the operating member 330Z further has a third driving portion 333Z and a fourth driving portion 334Z. The third driving portion 333Z and the fourth driving portion 334Z are spaced apart and located between the first driving portion 331Z and the second driving portion 332Z. The first linkage member 351Z and the second linkage member 352Z are spaced apart and a third avoidance portion 354Z is formed therebetween. Specifically, the first linkage member 351Z further has a third abutting portion 3512Z, and the second linkage member 352Z further has a fourth abutting portion 3522Z. When the toggling member 353Z is in the first position, the third abutting portion 3512Z abuts against the third driving portion 333Z, the first abutting portion 3511Z abuts against the first driving portion 331Z, and the fourth driving portion 334Z is located opposite the third avoidance portion 354Z. Therefore, when the operating member 330Z moves upward along the second direction F2, the first driving portion 331Z can abut against the first abutting portion 3511Z, and the third abutting portion 3512Z can abut against the third driving portion 333Z, thereby simultaneously pushing the first linkage member 351Z to move along the second direction F2. At the same time, during the process of the operating member 330Z moving upward along the second direction F2, the fourth driving portion 334Z gradually inserts into the third avoidance portion 354Z, avoiding the situation of driving the second linkage member 352Z to move when the toggling member 353Z is in the first position. Similarly, when the toggling member 353Z is in the second position, the fourth abutting portion 3522Z abuts against the fourth driving portion 334Z, the second abutting portion 3521Z abuts against the second driving portion 332Z, and the third driving portion 333Z is located opposite the third avoidance portion 354Z. Therefore, when the operating member 330Z moves upward along the second direction F2, the second driving portion 332Z can abut against the second abutting portion 3521Z, and the fourth abutting portion 3522Z can abut against the fourth driving portion 334Z, thereby simultaneously pushing the second linkage member 352Z to move along the second direction F2. At the same time, during the process of the operating member 330Z moving upward along the second direction F2, the third driving portion 333Z gradually inserts into the third avoidance portion 354Z, avoiding the situation of driving the first linkage member 351Z to move when the toggling member 353Z is in the second position.

[0222] In one embodiment, as Figure 43 shown, a first avoidance portion is formed between the first abutting portion 3511Z and the third abutting portion 3512Z. A second avoidance portion is formed between the second abutting portion 3521Z and the fourth abutting portion 3522Z. Specifically, when the toggling member 353Z is in the first position and the operating member 330Z is operated, the second avoidance portion is used to avoid the second driving portion 332Z. When the toggling member 353Z is in the second position and the operating member 330Z is operated, the first avoidance portion is used to avoid the first driving portion 331Z.

[0223] Please refer to Figure 34 , Figure 37 andFigure 38 In one embodiment, the unlocking mechanism 300Z further includes a fourth reset member 360Z, which may be an elastic member such as a spring or a shrapnel. The fourth reset member 360Z abuts between the handlebar frame 100Z (e.g., the push handle tube 112Z) and the toggle member 353Z, and is used to provide an elastic restoring force for the toggle member 353Z, so that the toggle member 353Z is maintained at the first position or the second position. For example, in this embodiment, the fourth reset member 360Z is used to keep the toggle member 353Z at the first position. If the wheel locking mechanism 500Z needs to be unlocked, the operating member 330Z can be directly operated (e.g., pressed or pushed upward). If the height adjustment locking mechanism 130Z needs to be unlocked, the toggle member 353Z needs to be moved to the second position first, and then the operating member 330Z needs to be operated. After the height adjustment locking mechanism 130Z is unlocked, the toggle member 353Z is released, and the toggle member 353Z is automatically reset to the second position under the reset action of the fourth reset member 360Z.

[0224] In one embodiment, one of the first linking member 351Z and the first release member 310Z has a first guide recess (not shown in the figure), and the other has a first matching protrusion (not shown in the figure). The first matching protrusion is slidably disposed in the first guide recess, and the first guide recess extends along the first direction F1. Similarly, one of the second linking member 352Z and the second release member 320Z has a second guide recess (not shown in the figure), and the other has a second matching protrusion (not shown in the figure). The second matching protrusion is slidably disposed in the second guide recess, and the second guide recess extends along the first direction F1. In this way, when the toggle member 353Z switches between the first position and the second position along the first direction F1, it can drive the first link member 351Z and the second link member 352Z to move left and right along the first direction F1 at the same time to keep the first release member 310Z and the second release member 320Z stationary; at the same time, when the first link member 351Z moves up and down along the second direction F2, the first link member 351Z can also drive the first release member 310Z to rotate; and when the second link member 352Z moves up and down along the second direction F2, the second link member 352Z can also drive the second release member 320Z to rotate.

[0225] In one embodiment, the operating member 330Z has an initial position when moving in the second direction F2 (see Figure 37 ) and unlocked position (see Figure 41 and Figure 42) When the operating member 330Z is in the initial position, the operating member 330Z can be operated to move and push the first linkage member 351Z or the second linkage member 352Z to move. In other words, when the operating member 330Z is in the initial position, there may be a gap or just contact between the first driving portion 331Z on the operating member 330Z and the first abutting portion 3511Z, and between the third driving portion 333Z and the third abutting portion 3512Z (or between the second driving portion 332Z and the second abutting portion 3521Z, and between the fourth driving portion 334Z and the fourth abutting portion 3522Z). In this way, the first linkage member 351Z (or the second linkage member 352Z) can be pushed upward by pushing or pressing the operating member 330Z upward. When the operating member 330Z is in the unlocking position, the operating member 330Z pushes the first linkage member 351Z or the second linkage member 352Z.

[0226] Specifically, as Figure 37 、 Figures 41 to 43 shown, when the toggling member 353Z is in the first position and the operating member 330Z is in the initial position, there may be a gap or just contact between the first driving portion 331Z and the first abutting portion 3511Z, and between the third driving portion 333Z and the third abutting portion 3512Z. At this time, the operating member 330Z can be pushed or pressed upward to move to the unlocking position, and during this process, the first linkage member 351Z is pushed, so that the first linkage member 351Z drives the first unlocking member 310Z to rotate. When the toggling member 353Z is in the second position and the operating member 330Z is in the initial position, there may be a gap or just contact between the second driving portion 332Z and the second abutting portion 3521Z, and between the fourth driving portion 334Z and the fourth abutting portion 3522Z. At this time, the operating member 330Z can be pushed or pressed upward to move to the unlocking position, and during this process, the second linkage member 352Z is pushed, so that the second linkage member 352Z drives the second unlocking member 320Z to rotate.

[0227] In an embodiment, as Figure 37 and Figure 39 shown, the unlocking mechanism 300Z further includes a fifth reset member 370Z, which can be an elastic member such as a spring or a spring piece. The fifth reset member 370Z abuts between the mounting seat 340Z of the vehicle frame 100Z and the operating member 330Z, and is used to provide an elastic restoring force for the operating member 330Z to keep the operating member 330Z in the initial position.

[0228] Please refer to Figure 33 、 Figures 40 to 42, in one embodiment, the unlocking mechanism 300Z further includes a first fixed cover 381Z and a second fixed cover 382Z. The first fixed cover 381Z and the second fixed cover 382Z are disposed on the upper and lower sides of the push handle tube 112Z. Among them, the first fixed cover 381Z is located at the top of the push handle tube 112Z, the second fixed cover is located at the bottom of the push handle tube 112Z, and a through hole for the operating member 330Z to pass through is provided on the second fixed cover 382Z. The first fixed cover 381Z and the second fixed cover 382Z are connected and cooperated and fixed to the push handle tube 112Z. In this way, components such as the operating member 330Z can be limited, and the operating member 330Z and the like can be prevented from detaching from the push handle tube 112Z. In addition, by covering the first fixed cover 381Z and the second fixed cover 382Z outside the first unlocking member 310Z, the second unlocking member 320Z, and the safety lock 350Z, the unlocking mechanism 300Z and the cart frame 1000Z can be simplified and beautified. Specifically, as Figure 41 and Figure 42 shown, an operation hole 3811Z is provided on the first fixed cover 381Z, and a pushing portion 3531Z is provided on the toggling member 353Z. The pushing portion 3531Z can pass through the operation hole 3811Z for the user to hold, and the user can change the position of the toggling member 353Z by pushing the pushing portion 3531Z. Of course, in other embodiments, as Figure 44 shown, the first fixed cover 381Z and the second fixed cover 382Z are disposed on the front and rear sides of the push handle tube 112Z. Among them, the first fixed cover 381Z is located at the rear side of the push handle tube 112Z, the second fixed cover 382Z is located at the front side of the push handle tube 112Z, and the first fixed cover 381Z and the second fixed cover 382Z enclose and jointly form a through hole for the operating member 330Z to pass through, and an operation hole 3811Z is provided on the first fixed cover 381Z.

[0229] Figure 45 FIG. shows a partial structural perspective view of a cart frame 1000Z according to a second embodiment of the present invention. The cart frame 1000Z is similar to the above-mentioned first embodiment and includes components such as a cart frame 100Z, a wheel frame 200Z, a wheel seat 230Z, and an unlocking mechanism 300Z. The cart frame 1000Z of this embodiment is a variant of the cart frame 1000Z of the above-mentioned first embodiment. Without conflict, the structure of the components and the connection relationship between the components in this embodiment can refer to the description in the above first embodiment. The following mainly describes the differences between this embodiment and the above first embodiment.

[0230] In this embodiment, "the upper cart frame 110Z moves relative to the lower cart frame 120Z" means that the upper cart frame 110Z can rotate relative to the lower cart frame 120Z. The upper cart frame 110Z and the lower cart frame 120Z are restricted or allowed to rotate relative to each other by a height adjustment locking mechanism 130Z. Specifically, in one embodiment, as Figures 45 to 47As shown, the height adjustment locking mechanism 130Z includes a first connecting seat 138Z, a second connecting seat 139Z, and a second locking member 1311Z. Among them, the first connecting seat 138Z is connected to the upper handrail 110Z, the second connecting seat 139Z is connected to the lower handrail 120Z and pivotally connected to the first connecting seat 138Z. The second locking member 1311Z is axially movably disposed between the first connecting seat 138Z and the second connecting seat 139Z to restrict or allow the relative pivoting of the first connecting seat 138Z and the second connecting seat 139Z, thereby restricting or allowing the upper handrail 110Z to rotate relative to the lower handrail. When the upper handrail 110Z rotates relative to the lower handrail 120Z around the height adjustment locking mechanism 130Z, the height of the upper handrail 110Z (specifically, the pushing tube 112Z) relative to the ground can be changed (see Figure 46 ), so that users of different heights can hold the pushing tube 112Z. It should be noted that in this embodiment, in order to clearly understand the position of the upper handrail 110Z after rotating relative to the lower handrail 120Z, Figure 46 dashed lines are used to mark different positions of the upper handrail 110Z after rotating relative to the lower handrail 120Z.

[0231] Please refer to Figures 47 to 49 . In this embodiment, on the side of the first connecting seat 138Z facing the second connecting seat 139Z, there is a first chamber 1381Z, and the side wall of the first chamber 1381Z is provided with a first locking groove 1382Z. On the side of the second connecting seat 139Z facing the first connecting seat 138Z, there is a second chamber 1391Z, and the side wall of the second chamber 1391Z is provided with a second locking groove (not shown in the figure). The second locking member 1311Z is provided with locking teeth 13111Z and has a locking position and an unlocking position. Specifically, when the second locking member 1311Z is in the locking position, the locking teeth 13111Z are simultaneously engaged with the first locking groove 1382Z and the second locking groove, so that the relative pivoting of the first connecting seat 138Z with respect to the second connecting seat 139Z can be restricted. When the second locking member 1311Z is in the unlocking position, the locking teeth 13111Z withdraw from the first locking groove 1382Z or the second locking groove, so that the relative pivoting of the first connecting seat 138Z with respect to the second connecting seat 139Z can be allowed.

[0232] Please continue to refer to Figures 47 to 49 . In this embodiment, the height adjustment locking mechanism 130Z further includes a driving member 1312Z, which is movably disposed on the side of the first connecting seat 138Z facing away from the second connecting seat 139Z, and the driving member 1312Z axially passes through the first connecting seat 138Z and abuts against the second locking member 1311Z to be able to drive the second locking member 1311Z to move, so that the second locking member 1311Z can withdraw from the first locking groove 1382Z. Specifically, in combination with Figure 42 、Figures 47 to 49 Moreover, the height adjustment locking mechanism 130Z further includes a second traction member 137Z, which is connected between the driving member 1312Z and the second unlocking member 320Z. When it is necessary to adjust the height of the rider frame 100Z, the second unlocking member 320Z can be driven to rotate by operating the operating member 330Z. In this way, under the transmission action of the second traction member 137Z, the driving member 1312Z is driven to move so as to push the second locking member 1311Z completely away and retreat into the second chamber 1391Z. Of course, in other embodiments, the driving member 1312Z can also be movably disposed on the side of the second connecting seat 139Z facing away from the first connecting seat 138Z, and the driving member 1312Z axially penetrates through the second connecting seat 139Z and abuts against the second locking member 1311Z so as to be able to drive the second locking member 1311Z to move. In this way, the second locking member 1311Z can be withdrawn from the second locking groove. When it is necessary to adjust the height of the rider frame 100Z, the second unlocking member 320Z can be driven to rotate by operating the operating member 330Z. In this way, under the transmission action of the second traction member 137Z, the driving member 1312Z is driven to move so as to push the second locking member 1311Z completely away and retreat into the first chamber 1381Z.

[0233] It should be noted that, in this embodiment, the third reset member 135Z axially abuts between the second locking member 1311Z and the second connecting seat 139Z and is used to enable the second locking member 1311Z to maintain in the locked position. In addition, it should also be noted that, in this embodiment, when it is necessary to adjust the height of the rider frame 100Z, the user can also directly operate (such as pressing) the driving member 1312Z to push the second locking member 1311Z without operating the operating member 330Z.

[0234] In this embodiment, the first traction member 540Z can be directly passed through between the first connecting seat 138Z and the second connecting seat 139Z to extend into the wheel frame 200Z through the height adjustment locking mechanism 130Z. Of course, in other embodiments, such as Figure 50As shown, the height adjustment locking mechanism 130Z may further include a cover body 1341Z. The cover body 1341Z may be connected to the first connecting seat 138Z or the second connecting seat 139Z, for example, and a through space 1342Z may be formed between the cover body 1341Z and the first connecting seat 138Z or the second connecting seat 139Z. The first traction member 540Z is disposed in the through space 1342Z. Specifically, when the driving member 1312Z is movably disposed on a side of the first connecting seat 138Z facing away from the second connecting seat 139Z, the cover body 1341Z is disposed on a side of the second connecting seat 139Z facing away from the first connecting seat 138Z and forms the through space 1342Z with the second connecting seat 139Z. When the driving member 1312Z is movably disposed on a side of the second connecting seat 139Z facing away from the first connecting seat 138Z, the cover body 1341Z is disposed on a side of the first connecting seat 138Z facing away from the second connecting seat 139Z and forms the through space 1342Z with the first connecting seat 138Z.

[0235] The above-mentioned cart frame 1000Z and its unlocking mechanism 300Z have the following technical effects:

[0236] The above-mentioned cart frame 1000Z includes an unlocking mechanism 300Z. In the above-mentioned unlocking mechanism 300Z, since the first unlocking member 310Z is rotatably disposed on the cart frame 1000Z and is drivingly connected to the wheel locking mechanism 500Z, the second unlocking member 320Z is rotatably disposed on the cart frame 1000Z and is drivingly connected to the height adjustment locking mechanism 130Z, and the operating member 330Z is movable and used to drive either the first unlocking member 310Z or the second unlocking member 320Z to rotate. Among them, the wheel locking mechanism 500Z can allow the wheel 240Z to rotate relative to the rear wheel frame 220Z along with the wheel seat 230Z for drifting steering, and the height adjustment locking mechanism 130Z can allow the upper handrail 110Z to move relative to the lower handrail 120Z. Therefore, the user can control the rotation of the first unlocking member 310Z by driving the movement of the operating member 330Z, and indirectly control the wheel locking mechanism 500Z, so that the cart frame 1000Z has the function of drifting steering. At the same time, the user can also control the rotation of the second unlocking member 320Z by driving the movement of the operating member 330Z, and indirectly control the height adjustment locking mechanism 130Z, so that the overall height of the handrail frame 100Z is adjustable. It is precisely because the user only needs to operate the above-mentioned unlocking mechanism 300Z to separately control different locking mechanisms, thus improving the operation convenience of the user.

[0237] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0238] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A unlocking mechanism, applicable to a trolley frame, the trolley frame comprising an upper handle frame, a lower handle frame, a wheel frame, a height adjustment locking mechanism and a folding locking mechanism, the upper handle frame and the lower handle frame restricting or allowing relative movement therebetween through the height adjustment locking mechanism, the lower handle frame being pivotally connected to the wheel frame and restricting or allowing relative pivoting therebetween through the folding locking mechanism, characterized in that, The unlocking mechanism includes: A first unlocking member rotatably disposed on the stroller frame, the first unlocking member being drivingly connected to the folding and locking mechanism to allow the lower handrail to pivot relative to the wheel frame; A second unlocking member rotatably disposed on the stroller frame, the second unlocking member being drivingly connected to the height adjustment locking mechanism to allow the upper handrail to move relative to the lower handrail; and An operating member movably disposed on the stroller frame and adapted to drive either the first unlocking member or the second unlocking member to rotate.

2. A unlocking mechanism, applicable to a trolley frame, the trolley frame comprising a handrail frame, a wheel frame, a reversing locking mechanism and a folding locking mechanism, the handrail frame being rotatably arranged on the wheel frame, the reversing locking mechanism and the folding locking mechanism both being arranged between the handrail frame and the wheel frame, the handrail frame being capable of being restricted or allowed to rotate relative to the wheel frame by the reversing locking mechanism for reversing, and the handrail frame being further capable of being restricted or allowed to rotate relative to the wheel frame by the folding locking mechanism for folding, characterized in that, The unlocking mechanism includes: A first unlocking member rotatably disposed on the stroller frame and drivingly connected to the reversing locking mechanism to allow the handrail to rotate relative to the wheel frame for reversing; A second unlocking member rotatably disposed on the stroller frame and drivingly connected to the folding and locking mechanism to allow the handrail to rotate relative to the wheel frame for folding; and An operating member movably disposed on the stroller frame and selectively driving the first unlocking member or the second unlocking member to rotate.

3. The unlocking mechanism according to claim 1 or 2, characterized in that, The unlocking mechanism further includes a safety lock movably disposed on the stroller frame and switchable between a first position and a second position; when the safety lock is in the first position, the operating member is drivingly connected to the first unlocking member through the safety lock; when the safety lock is in the second position, the operating member is drivingly connected to the second unlocking member through the safety lock.

4. The unlocking mechanism according to claim 3, characterized in that The safety lock includes: A toggle member movably disposed on the stroller frame in a first direction and switchable between the first position and the second position; A first linkage member movably connected to the toggle member in a second direction and drivingly connected to the first unlocking member; and A second linkage member movably connected to the toggle member in the second direction and drivingly connected to the second unlocking member; wherein the first direction intersects the second direction, and the operating member is movable relative to the stroller frame in the second direction; when the toggle member is in the first position, the operating member can be operated to push the first linkage member to move and rotate the first unlocking member; when the toggle member is in the second position, the operating member can be operated to push the second linkage member to move and rotate the second unlocking member.

5. The unlocking mechanism according to claim 1, wherein The first unlocking member is provided with a first connecting portion, the first connecting portion is disposed offset from the rotation center of the first unlocking member, and the first connecting portion is used to connect the folding and locking mechanism; the second unlocking member is provided with a second connecting portion, the second connecting portion is disposed offset from the rotation center of the second unlocking member, and the second connecting portion is used to connect the height adjustment locking mechanism.

6. A trolley frame, characterized in that, Comprising an upper handrail frame, a lower handrail frame, a wheel frame, a folding and locking mechanism, a height adjustment locking mechanism, and the unlocking mechanism as recited in claim 1, wherein relative movement between the upper handrail frame and the lower handrail frame is restricted or permitted by the height adjustment locking mechanism, the lower handrail frame is pivotally connected to the wheel frame and relative pivotal movement between the two is restricted or permitted by the folding and locking mechanism, and the unlocking mechanism is disposed on the handrail frame or the wheel frame and is respectively drivingly connected to the folding and locking mechanism and the height adjustment locking mechanism to permit pivotal movement of the lower handrail frame relative to the wheel frame and movement of the upper handrail frame relative to the lower handrail frame.

7. A trolley frame has a deployed state and a collapsed state, characterized in that, Comprising: a wheel frame; a handrail frame rotatably disposed on the wheel frame; a reversing locking mechanism disposed between the handrail frame and the wheel frame, whereby the handrail frame can be restricted or permitted to rotate relative to the wheel frame by the reversing locking mechanism for reversing; a folding and locking mechanism disposed between the handrail frame and the wheel frame, whereby the handrail frame can be restricted or permitted to rotate relative to the wheel frame by the folding and locking mechanism for folding; and the unlocking mechanism as recited in claim 2, disposed on the handrail frame and respectively drivingly connected to the folding and locking mechanism and the unlocking mechanism to permit rotation of the handrail frame relative to the wheel frame for reversing or folding.

8. A unlocking mechanism, applicable to a trolley frame, the trolley frame including a handle frame, a wheel frame, a wheel seat and a wheel locking mechanism, the handle frame including an upper handle frame, a lower handle frame and a height adjustment locking mechanism disposed therebetween, the upper handle frame and the lower handle frame restricting or allowing relative movement therebetween through the height adjustment locking mechanism; the wheel seat being rotatably connected to the wheel frame, the wheel locking mechanism being disposed between the wheel frame and the wheel seat and being used for restricting or allowing the wheel seat to rotate relative to the wheel frame, characterized in that, The unlocking mechanism comprises: a first unlocking member rotatably disposed on the trolley frame and drivingly connected to the wheel locking mechanism to permit rotation of the wheel seat relative to the wheel frame; a second unlocking member rotatably disposed on the trolley frame and drivingly connected to the height adjustment locking mechanism to permit movement of the upper handrail frame relative to the lower handrail frame; and an operating member movably disposed on the trolley frame and selectively driving rotation of the first unlocking member or the second unlocking member.

9. A trolley frame, characterized in that, Comprising: a handrail frame, a wheel frame, a wheel seat, a wheel locking mechanism, and the unlocking mechanism as recited in claim 8, wherein the handrail frame comprises an upper handrail frame, a lower handrail frame, and a height adjustment locking mechanism disposed therebetween, and relative movement between the upper handrail frame and the lower handrail frame is restricted or permitted by the height adjustment locking mechanism; the wheel seat is rotatably connected to the wheel frame, the wheel locking mechanism is disposed between the wheel frame and the wheel seat and is used to restrict or permit rotation of the wheel seat relative to the wheel frame, and the unlocking mechanism is disposed on the handrail frame and is respectively drivingly connected to the wheel locking mechanism and the height adjustment mechanism to permit rotation of the wheel seat relative to the wheel frame and movement of the upper handrail frame relative to the lower handrail frame.

10. The cart frame according to claim 9, characterized in that, The wheel locking mechanism comprises: a first locking recess disposed on the wheel seat; a first locking member movably disposed on the wheel frame and adapted to lockingly cooperate with the first locking recess; and a first pulling member connected between the first unlocking member and the first locking member; When the first locking member extends into the first locking recess for locking engagement, the wheel seat is restricted from rotating relative to the wheel carrier. When the first unlocking member drives the first locking member away from the first locking recess through the first traction member to release the engagement, the wheel seat is allowed to rotate relative to the wheel carrier.

11. The trolley frame according to claim 10, characterized in that, The first traction member is disposed within the rider frame and the wheel carrier and passes through the height adjustment locking mechanism.

12. The trolley frame according to claim 11, characterized in that, The height adjustment locking mechanism includes a support seat provided with a first through-channel which is a U-shaped channel. One end of the first traction member away from the first unlocking member extends into the U-shaped channel from one port and extends out from the other port of the U-shaped channel, so that the first traction member is disposed around the support seat.

13. The trolley frame according to claim 9, characterized in that, The upper rider frame is slidable relative to the lower rider frame. The height adjustment locking mechanism includes: A second mating locking portion provided on the lower rider frame; A second locking assembly movably disposed on the upper rider frame and adapted to be locked in engagement with the second mating locking portion; and A second traction member connected between the second unlocking member and the second locking assembly; When the second locking assembly extends into the second mating locking portion for locking engagement, the upper rider frame is restricted from sliding relative to the lower rider frame. When the second unlocking member drives the second locking assembly away from the second mating locking portion through the second traction member to release the engagement, the upper rider frame is allowed to slide relative to the lower rider frame; or The height adjustment locking mechanism includes: A first connecting seat connected to the upper rider frame; A second connecting seat connected to the lower rider frame and pivotally connected to the first connecting seat; and A second locking member axially movably disposed between the first connecting seat and the second connecting seat to restrict or allow relative pivoting therebetween; A driving member movably disposed on the first connecting seat or the second connecting seat. The driving member axially passes through the first connecting seat or the second connecting seat and abuts against the second locking member to drive the second locking member to move; and A second traction member connecting the driving member and the second unlocking member. When the second unlocking member is operated, the second traction member drives the second locking member to move through the driving member to allow the first connecting seat to pivot relative to the second connecting seat.

14. The pushcart frame according to claim 13, wherein The height adjustment locking mechanism further includes a support seat provided with a first through-channel and a second through-channel. The first through-channel is a U-shaped channel and the second through-channel is a linear channel. The second traction member is received in the linear channel; The wheel locking mechanism includes a first traction member disposed within the wheel carrier and the rider frame and passing through the U-shaped channel.

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