Stroller frame and unlocking mechanism thereof

Abstract

The utility model 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 field of baby product technology, and in particular to a stroller frame and its locking mechanism. Background Technology

[0002] For families with infants and toddlers, using strollers as an auxiliary care tool when going out has become very common and convenient.

[0003] To meet users' needs for practicality and convenience in strollers, a folding and locking mechanism is usually installed on the stroller frame, allowing users to keep the stroller in the unfolded or folded state. In addition, to improve the stroller's versatility, a height adjustment and locking mechanism is also provided on the handlebars, allowing users to adjust the height of the handlebars to suit different users' grip preferences. Currently, common strollers typically use two separate mechanisms for folding and locking, and two separate operating mechanisms to adjust either the frame's position or the handlebar height. However, this design can easily lead to inconvenience for users. Utility Model Content

[0004] Therefore, it is necessary to provide a trolley frame and its unlocking mechanism to address the above problems. This unlocking mechanism can unlock both the closing locking mechanism and the height adjustment locking mechanism.

[0005] This utility model provides a release mechanism applicable to a trolley frame. The trolley frame includes an upper handle, a lower handle, a wheel frame, a height adjustment locking mechanism, and a retraction locking mechanism. The upper handle and the lower handle are restricted or allowed to move relative to each other by the height adjustment locking mechanism. The lower handle is pivotally connected to the wheel frame and is restricted or allowed to pivot relative to each other by the retraction locking mechanism. The release mechanism includes: a first release member rotatably disposed on the trolley frame, the first release member being drivenly connected to the retraction locking mechanism to allow the lower handle to pivot relative to the wheel frame; a second release member rotatably disposed on the trolley frame, the second release member being drivenly connected to the height adjustment locking mechanism to allow the upper handle to move relative to the lower handle; and an operating member movably disposed on the trolley frame and adapted to drive either the first release member or the second release member to rotate.

[0006] In the aforementioned unlocking mechanism, the first unlocking member is rotatably mounted on the trolley frame and driven by the retraction locking mechanism, while the second unlocking member is rotatably mounted on the trolley frame and driven by the height adjustment locking mechanism. The operating member is movable and can drive either the first or second unlocking member to rotate. The retraction locking mechanism allows the lower handframe to pivot relative to the wheel frame, and the height adjustment locking mechanism allows the upper handframe to slide relative to the lower handframe. Therefore, the user can control the rotation of the first unlocking member by moving the operating member, thereby indirectly controlling the retraction locking mechanism to switch the trolley frame between the extended and locked states. Simultaneously, the user can also control the rotation of the second unlocking member by moving the operating member, thereby indirectly controlling the height adjustment locking mechanism to make the height of the trolley frame adjustable. Because the user only needs to operate the aforementioned unlocking mechanism to control the different locking mechanisms, the ease of operation for the user is improved.

[0007] In one embodiment, the release mechanism further includes a safety lock, which is movably mounted on the trolley frame and can switch between a first position and a second position; when the safety lock is in the first position, the operating member is driven to connect with the first release member through the safety lock; when the safety lock is in the second position, the operating member is driven to connect with the second release member through the safety lock.

[0008] In one embodiment, the safety lock includes: an actuating member movably disposed on the trolley frame along a first direction and switchable between a first position and a second position; a first linkage member movably connected to the actuating member along a second direction and drivenly connected to the first release member; and a second linkage member movably connected to the actuating member along a second direction and drivenly connected to the second release member; wherein the first direction intersects the second direction, and the operating member is movable relative to the trolley frame along the second direction; when the actuating member is in the first position, the operating member can be operated to push the first linkage member to move, thereby rotating the first release member; when the actuating member is in the second position, the operating member can be operated to push the second linkage member to move, thereby rotating the second release member.

[0009] In one embodiment, the first linkage has a first abutting portion, the second linkage has a second abutting portion, and the operating member has a first driving portion and a second driving portion spaced apart; when the actuating member is in the first position, the first abutting portion is located opposite the first driving portion, and the second abutting portion is misaligned with the second driving portion; when the actuating member is in the second position, the second abutting portion is located opposite the second driving portion, and the first abutting portion is misaligned with the first driving portion.

[0010] In one embodiment, the operating member further includes a third driving portion and a fourth driving portion, the third driving portion being spaced apart from the fourth driving portion and located between the first driving portion and the second driving portion; the first linkage member and the second linkage member are spaced apart and form a third clearance portion between them, the first linkage member further having a third abutting portion, and the second linkage member further having a fourth abutting portion; when the toggle member is in the first position, the third abutting portion is located opposite the third driving portion, and the fourth driving portion is located opposite the third clearance portion; when the toggle member is in the second position, the fourth abutting portion is located opposite the fourth driving portion, and the third driving portion is located opposite the third clearance portion.

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

[0012] In one embodiment, one of the first linkage and the first release member has a first guide recess and the other has a first mating protrusion, the first mating protrusion being slidably disposed within the first guide recess and extending along the first direction; one of the second linkage and the second release member has a second guide recess and the other has a second mating protrusion, the second mating protrusion being slidably disposed within the second guide recess and extending along the first direction.

[0013] In one embodiment, the release mechanism further includes a first elastic member abutting between the trolley frame and the actuating member, for providing an elastic restoring force to the actuating member to keep the actuating member in the first position or the second position.

[0014] In one embodiment, the actuating member has an initial position and an unlocked position; when the actuating member is in the initial position, the actuating member can be operated to move to push the first linkage or the second linkage to move; when the actuating member is in the unlocked position, the actuating member pushes the first linkage or the second linkage.

[0015] In one embodiment, the release mechanism further includes a second elastic member abutting between the trolley frame and the operating member to provide an elastic restoring force to the operating member so that the operating member remains in the initial position.

[0016] In one embodiment, the operating member has an initial position and a release position; one of the first release 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 one 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 of the first stop recess when the operating member is switched to the release position; one of the second release 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 one 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 of the second stop recess when the operating member is switched to the release position.

[0017] In one embodiment, the first release member is provided with a first connecting portion, which is offset from the rotation center of the first release member, and the first connecting portion is used to connect to the closing locking mechanism; the second release member is provided with a second connecting portion, which is offset from the rotation center of the second release member, and the second connecting portion is used to connect to the height adjustment locking mechanism.

[0018] This utility model also provides a trolley frame, including an upper frame, a lower frame, a wheel frame, a folding and locking mechanism, a height adjustment and locking mechanism, and a release mechanism as described above. The upper frame and the lower frame restrict or allow relative movement between them through the height adjustment and locking mechanism. The lower frame is pivotally connected to the wheel frame and restricts or allows relative pivoting between them through the folding and locking mechanism. The release mechanism is disposed on the frame or the wheel frame and is drivenly connected to the folding and locking mechanism and the height adjustment and locking mechanism, respectively, so as to allow the lower frame to pivot relative to the wheel frame and the upper frame to move relative to the lower frame.

[0019] In one embodiment, the retraction locking mechanism includes a first locking member and a fixing member. The fixing member has a locking recess and is installed in one of the wheel frame or the undercarriage frame. The first locking member is movably disposed in the other of the wheel frame or the undercarriage frame and is operably connected to the first release member. When the first locking member is inserted into the locking recess, the undercarriage frame is restricted from pivoting relative to the wheel frame. When the first locking member is retracted from the locking recess, the undercarriage frame can pivot relative to the wheel frame.

[0020] In one embodiment, the retraction locking mechanism further includes a first traction member connected between the first release member and the first locking member, wherein the first release member drives the first locking member to retract from the locking recess via the first traction member.

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

[0022] In one embodiment, the rider locking assembly is disposed on the upper handlebar, the rider locking assembly comprising: a movable member movably disposed on the upper handlebar and operably connected to a second release member, the movable member having a guide groove extending obliquely relative to the moving direction of the movable member; and a second locking member having a guide post extending into and slidingly engaging with the guide groove to be able to extend into or retract from the locking hole.

[0023] In one embodiment, the height adjustment locking mechanism further includes a second traction member connected between the second release member and the movable member. The second release member drives the movable member to move via the second traction member, thereby driving the second locking member to retract from the locking hole.

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

[0025] This application provides a release mechanism applicable to a trolley frame. The trolley frame includes a handlebar, a wheel frame, a reversing locking mechanism, and a retraction locking mechanism. The handlebar is rotatably mounted on the wheel frame. Both the reversing locking mechanism and the retraction locking mechanism are disposed between the handlebar and the wheel frame. The handlebar can be restricted or allowed to rotate relative to the wheel frame for reversing by the reversing locking mechanism, and the handlebar can also be restricted or allowed to rotate relative to the wheel frame for retraction by the retraction locking mechanism. The release mechanism includes: a first release member, rotatably mounted on the trolley frame and drivenly connected to the reversing locking mechanism to allow the handlebar to rotate relative to the wheel frame for reversing; a second release member, rotatably mounted on the trolley frame and drivenly connected to the retraction locking mechanism to allow the handlebar to rotate relative to the wheel frame for retraction; and an operating member, movably mounted on the trolley frame, and selectively driving the first or second release member to rotate.

[0026] In one embodiment, the release mechanism further includes a safety lock, which is movably mounted on the trolley frame and can switch between a first position and a second position; when the safety lock is in the first position, the operating member is driven to connect with the first release member through the safety lock; when the safety lock is in the second position, the operating member is driven to connect with the second release member through the safety lock.

[0027] In one embodiment, the safety lock includes: a first linkage, drivenly connected to the first release member; a second linkage, drivenly connected to the second release member; and a toggle member, respectively connected to the first linkage and the second linkage, wherein the toggle member is movably disposed on the trolley frame and can switch between a first position and a second position to drive the first linkage and the second linkage to move along a third direction; wherein, when the toggle member is in the first position, the operating member is operated to push the first linkage to move along a fourth direction, thereby causing the first release member to rotate; when the toggle member is in the second position, the operating member is operated to push the second linkage to move along a fourth direction, thereby causing the second release member to rotate, wherein the third direction intersects with the fourth direction.

[0028] In one embodiment, the first release member is provided with a first connecting portion, which is offset from the rotation center of the first release member, and the first connecting portion is used to connect to the reversing locking mechanism; the second release member is provided with a second connecting portion, which is offset from the rotation center of the second release member, and the second connecting portion is used to connect to the closing locking mechanism.

[0029] This application also provides a trolley frame having an extended state and a retracted state, comprising: a wheel frame; a handlebar frame rotatably mounted on the wheel frame; a reversing locking mechanism disposed between the handlebar frame and the wheel frame, wherein the handlebar frame can be restricted or allowed to rotate relative to the wheel frame for reversing; a retraction locking mechanism disposed between the handlebar frame and the wheel frame, wherein the handlebar frame can be restricted or allowed to rotate relative to the wheel frame for retraction; and a release mechanism as described above, disposed on the handlebar frame and drivenly connected to the retraction locking mechanism and the release mechanism respectively, to allow the handlebar frame to rotate relative to the wheel frame for reversing or retraction.

[0030] In one embodiment, the rider frame is pivotally connected to the wheel frame at a first pivot point, so that the rider frame has a first use position and a second use position relative to the wheel frame; the reversing 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 being circumferentially spaced on the wheel frame around the first pivot point, the first locking member being 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 trolley frame is in the first use position, the top of the trolley frame is located on a first side of the wheel frame; when the trolley frame is in the second use position, the top of the trolley frame is located on a second side of the wheel frame; wherein the first side and the second side are arranged opposite to each other with respect to the travel direction of the trolley 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 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 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 frame to switch between the first use position and the second use position.

[0033] In one embodiment, the reversing locking mechanism further includes: a first driving member movably mounted on the rider frame and connected to the first locking member; and a first traction member connected to the first driving member and the first releasing member respectively; when the first releasing member rotates, the first releasing member drives the first driving member to move through the first traction member, thereby causing the first locking member to move from the first locking position to the first releasing position.

[0034] In one embodiment, the handframe and the wheel frame are pivotally connected at a first pivot point, so that the handframe has a first use position and a third use position relative to the wheel frame; when the handframe is in the first use position, the handframe moves away from the wheel frame around the first pivot point, so that the cart frame is in the unfolded state; when the handframe is in the third use position, the handframe moves closer to the wheel frame around the first pivot point, so that the cart frame is in the folded state.

[0035] In one embodiment, the retraction locking mechanism includes: a second locking member movable relative to the rider frame and having a second locked position and a second unlocked position; the wheel frame includes a rear wheel frame and a first transmission member, one end of the first transmission member being pivotally connected to the rear wheel frame and the other end being pivotally connected to the rider frame at a first pivot point; when the second locking member is in the second locked position, the second locking member engages with the first transmission member to restrict the rider frame from pivoting relative to the first transmission member, thereby restricting the rider frame from switching between the first use position and the third use position; when the second locking member is in the second unlocked position, the second locking member disengages from the first transmission member to allow the rider frame to pivot relative to the first transmission member, thereby allowing the rider 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 trolley frame is in the unfolded state, the second locking member engages with the first recess; when the trolley frame is in the retracted state, the second locking member engages with the second recess.

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

[0038] This application provides a release mechanism applicable to a trolley frame. The trolley frame includes a handlebar, a wheel frame, a wheel seat, and a wheel locking mechanism. The handlebar includes an upper handlebar, a lower handlebar, and a height adjustment locking mechanism disposed between them. The upper handlebar and the lower handlebar restrict or allow relative movement between them via 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 rotation of the wheel seat relative to the wheel frame. The release mechanism includes: a first release member, rotatably disposed on the trolley frame and drivenly connected to the wheel locking mechanism to allow rotation of the wheel seat relative to the wheel frame; a second release member, rotatably disposed on the trolley frame and drivenly connected to the height adjustment locking mechanism to allow movement of the upper handlebar relative to the lower handlebar; and an operating member, movably disposed on the trolley frame and selectively driving the first release member or the second release member to rotate.

[0039] In one embodiment, the first release member is provided with a first connecting portion, which is offset from the rotation center of the first release member, and the first connecting portion is used to connect to the wheel locking mechanism; the second release member is provided with a second connecting portion, which is offset from the rotation center of the second release member, and the second connecting portion is used to connect to the height adjustment locking mechanism.

[0040] This application also provides a trolley frame, including: a handlebar, a wheel frame, wheel seats, a wheel locking mechanism, and a release mechanism as described above. The handlebar includes an upper handlebar, a lower handlebar, and a height adjustment locking mechanism disposed between the two. The upper handlebar and the lower handlebar restrict or allow relative movement between them through the height adjustment locking mechanism. The wheel seats are 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 release mechanism is disposed on the handlebar and is drivenly connected to the wheel locking mechanism and the height adjustment locking mechanism respectively, so as to allow the wheel seat to rotate relative to the wheel frame and the upper handlebar to move relative to the lower handlebar.

[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 lock into the first locking recess; and a first traction member connected between the first release member and the first locking member; when the first locking member extends into the first locking recess to lock into place, the wheel seat is restricted from rotating relative to the wheel frame; when the first release member drives the first locking member out of the first locking recess via the first traction member to release the engagement, the wheel seat is allowed to rotate relative to the wheel frame.

[0042] In one embodiment, the first traction member is disposed within the rider frame and the wheel frame and passes through the height adjustment locking mechanism.

[0043] In one embodiment, the height adjustment locking mechanism includes a support base with a first through-channel, which is a U-shaped channel. The end of the first traction member away from the first release member extends into the U-shaped channel from one end and extends out from the other end of the U-shaped channel, so that the first traction member is arranged around the support base.

[0044] In one embodiment, the upper frame is slidable relative to the lower frame, and the height adjustment locking mechanism includes: a second locking part disposed on the lower frame; a second locking component movably disposed on the upper frame and adapted to lock into the second locking part; and a second traction member connected between the second release member and the second locking component; when the second locking component extends into the second locking part to lock into the engagement, the upper frame is restricted from sliding relative to the lower frame; when the second release member drives the second locking component to retract from the second locking part through the second traction member to release the engagement, the upper frame is allowed to slide relative to the lower frame.

[0045] In one embodiment, the height adjustment locking mechanism further includes a support base, the support base having a first through channel and a second through channel, the first through channel being a U-shaped channel and the second through channel being a straight channel, the second traction member being accommodated in the straight channel; the wheel locking mechanism includes a first traction member, the first traction member being disposed in the wheel frame and the rider frame and passing through the U-shaped channel.

[0046] In one embodiment, the height adjustment locking mechanism includes: a first connecting seat connected to the upper frame; a second connecting seat connected to the lower 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 between them.

[0047] In one embodiment, the height adjustment locking mechanism further includes: a drive member movably disposed on the side of the first connecting seat opposite to the second connecting seat or the side of the second connecting seat opposite to the first connecting seat, the drive member passing axially through the first connecting seat or the second connecting seat and abutting against the second locking member to drive the second locking member to move; and a second traction member connecting the drive member and the second release member, the second traction member driving the second locking member to move via the drive member when the second release member is operated, so as to allow the first connecting seat to pivot relative to the second connecting seat. Attached Figure Description

[0048] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0049] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0051] Figure 1 A perspective view of a trolley frame according to one embodiment of this application is shown schematically;

[0052] Figure 2 The illustration schematically shows a perspective view of the trolley frame from another angle in one embodiment of this application;

[0053] Figure 3 For along Figure 1 A cross-sectional view along line U1-U1, showing the first locking element inserted into the locking recess;

[0054] Figure 4 For along Figure 1 A cross-sectional view along line U1-U1, showing the first locking element disengaging from the locking recess;

[0055] Figure 5 for Figure 1 A three-dimensional view of the handframe in the trolley frame shown;

[0056] Figure 6 for Figure 1 A perspective view of the handframe in the trolley frame shown from another angle;

[0057] Figure 7 for Figure 5 The diagram shows a perspective view of the upper frame of the hoisting frame, in which the moving part of the height adjustment locking mechanism is assembled with the second locking part;

[0058] Figure 8 for Figure 5 The diagram shows a perspective view of the upper frame of the hoisting frame, in which the moving part of the height adjustment locking mechanism is separated from the second locking part;

[0059] Figure 9 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle circle;

[0060] Figure 10 for Figure 5 The diagram shown is an exploded view of the release mechanism on the rider's frame.

[0061] Figure 11 for Figure 10Enlarged schematic diagram of the structure at point B in the middle circle;

[0062] Figure 12 This is a partial structural diagram of the unlocking mechanism, in which the actuating element is in the first position and the operating element is in the initial position;

[0063] Figure 13 This is a partial structural diagram of the unlocking mechanism, in which the actuating element is in the first position and the operating element is in the unlocking position;

[0064] Figure 14 This is a partial structural diagram of the unlocking mechanism, in which the actuating element is in the second position and the operating element is in the initial position;

[0065] Figure 15 This is a partial structural diagram of the unlocking mechanism, in which the actuating element is in the second position and the operating element is in the unlocking position;

[0066] Figure 16 This is a perspective view of the trolley frame in an unfolded state according to an embodiment of this application, wherein the second locking member is in the second locked position;

[0067] Figure 17 This is a perspective view of the trolley frame in an unfolded state according to an embodiment of this application, wherein the second locking member is in the second unlocked position;

[0068] Figure 18 for Figure 16 Side view of the trolley frame shown;

[0069] Figure 19 for Figure 16 An enlarged schematic diagram of the structure at point A in circle A is shown.

[0070] Figure 20 for Figure 17 A magnified schematic diagram of the structure at point B shown in the diagram;

[0071] Figure 21 for Figure 16 The cross-sectional view of the handframe in the trolley frame shown, with the operating components in the initial position;

[0072] Figure 22 for Figure 16 The cross-sectional view of the handframe in the trolley frame shown shows the operating element in the unlocked position and the first release element rotating.

[0073] Figure 23 This is a perspective view of the trolley frame in a folded state according to one embodiment of this application;

[0074] Figure 24 This is a side view of the trolley frame in a folded state according to one embodiment of this application;

[0075] Figure 25 For along Figure 18 A sectional view of line U1-U1 in the middle;

[0076] Figure 26 for Figure 23 A magnified schematic diagram of the structure at point C shown in the diagram;

[0077] Figure 27 for Figure 21 A magnified schematic diagram of the structure at point D shown in the diagram;

[0078] Figure 28 for Figure 16 The cross-sectional view of the handframe in the trolley frame shown shows the operating element in the unlocked position and the second release element rotating.

[0079] Figure 29 for Figure 16 A perspective view of the release mechanism in the trolley frame shown;

[0080] Figure 30 for Figure 29 A partial structural schematic diagram of the release mechanism is shown.

[0081] Figure 31 for Figure 29 An exploded view of the release mechanism shown.

[0082] Figure 32 for Figure 30 A cross-sectional view of the release mechanism shown;

[0083] Figure 33 This is a perspective view of the trolley frame in the unfolded state in the first embodiment of this application;

[0084] Figure 34 for Figure 33 A sectional view of the trolley frame shown;

[0085] Figure 35 for Figure 33 The diagram shows a 3D view of the trolley frame in its folded state.

[0086] Figure 36 for Figure 34 A sectional view of the trolley frame shown;

[0087] Figure 37 for Figure 33 A cross-sectional view of the handframe in the trolley frame shown;

[0088] Figure 38 for Figure 33 A perspective view of the release mechanism in the trolley frame shown;

[0089] Figure 39 for Figure 38 A partial structural schematic diagram of the release mechanism is shown.

[0090] Figure 40 for Figure 38 An exploded view of the release mechanism shown.

[0091] Figure 41 for Figure 37 The cross-sectional view of the release mechanism shown shows the first release element being rotated;

[0092] Figure 42 for Figure 37 The cross-sectional view of the release mechanism shown shows the second release element being rotated;

[0093] Figure 43 for Figure 39 A cross-sectional view of the release mechanism shown;

[0094] Figure 44 A perspective view of the rider's frame in another embodiment;

[0095] Figure 45 This is a perspective view of the handframe in the trolley frame of the second embodiment of this application;

[0096] Figure 46 for Figure 45 The side view of the rider's frame shown;

[0097] Figure 47 for Figure 45 An exploded view of the rider frame structure shown.

[0098] Figure 48 for Figure 45 The cross-sectional view of the rider frame shown shows the second locking element in the locked position;

[0099] Figure 49 for Figure 45 The diagram shows a partial sectional view of the frame structure, with the second locking element in the unlocked position.

[0100] Figure 50 This is a sectional view of a portion of the rider's frame structure in another embodiment. (Explanation of reference numerals)

[0101] 1000X, trolley frame; 100X, release mechanism; 110X, first release component; 111X, first connecting part; 112X, first stop protrusion; 120X, second release component; 121X, second connecting part; 122X, second stop protrusion; 130X, operating component; 131X, first drive unit; 132X, second drive unit; 133X, third drive unit; 134X, fourth drive unit; 135X, limit post; 140X, safety lock; 141X, toggle component; 14 11X, Propelling part; 142X, First linkage member; 1421X, First abutting part; 1422X, Third abutting part; 1423X, First clearance part; 143X, Second linkage member; 1431X, Second abutting part; 1432X, Fourth abutting part; 1433X, Second clearance part; 144X, Third clearance part; 150X, First elastic member; 160X, Second elastic member; 171X, First fixing cover; 171X1, Operating hole; 172X, Second fixing cover; 200X 1. Handrail; 210X, Upper Handrail; 211X, First Support Tube; 212X, Push Handle Tube; 2121X, First Stop Recess; 2122X, Second Stop Recess; 220X, Lower Handrail; 221X, Second Support Tube; 300X, Wheel Carrier; 310X, Front Wheel Carrier; 311X, Front Link; 312X, Front Crossbar; 313X, Front Wheel Seat; 320X, Rear Wheel Carrier; 321X, Rear Link; 322X, Reinforcing Bar; 323X, Rear Wheel Seat; 400X, Height Adjustment Locking mechanism; 410X, rider locking assembly; 411X, moving part; 4111X, guide groove; 412X, second locking element; 413X, support base; 414X, fourth elastic element; 420X, locking hole; 430X, second traction element; 500X, retractable locking mechanism; 510X, first locking element; 520X, fixing element; 521X, locking recess; 530X, first traction element; 610X, front wheel; 620X, rear wheel; F1, first direction; F2, second direction;

[0102] 1000Y, trolley frame; 100Y, handrail frame; 110Y, support tube; 120Y, push handle tube; 130Y, fixed support base; 140Y, mounting base; 200Y, wheel frame; 210Y, front wheel frame; 220Y, rear wheel frame; 230Y, first transmission component; 240Y, handrail component; 250Y, second transmission component; 260Y, third transmission component; 270Y, wheel; 300Y, reversing locking mechanism; 310Y, first locking component; 311Y, locking part; 3 20Y, First locking component; 330Y, Second locking component; 301Y, Locking part; 340Y, First driving component; 350Y, First traction component; 360Y, First connecting component; 370Y, First reset component; 400Y, Closing and locking mechanism; 410Y, Second locking component; 420Y, Second driving assembly; 421Y, Second sliding sleeve; 422Y, Second driving component; 430Y, Second traction component; 440Y, Second reset component; 450Y, Second connecting component; 500Y, Release mechanism; 510Y, first release element; 511Y, first connecting part; 520Y, second release element; 521Y, second connecting part; 530Y, operating element; 531Y, first driving part; 532Y, second driving part; 533Y, third driving part; 534Y, fourth driving part; 540Y, safety lock; 541Y, first linkage element; 5411Y, first abutting part; 5412Y, third abutting part; 542Y, second linkage element; 5421Y, second abutting part Part; 5422Y, Fourth Abutting Part; 543Y, Actuating Part; 5431Y, Pushing Part; 544Y, Third Avoiding Part; 550Y, Third Resetting Part; 560Y, Fourth Resetting Part; 571Y, First Fixing Cover; 5711Y, Operating Hole; 572Y, Second Fixing Cover; A1, First Pivoting Point; A2, Second Pivoting Point; A3, Third Pivoting Point; A4, Fourth Pivoting Point; A5, Fifth Pivoting Point; A6, Sixth Pivoting Point; F1, First Direction; F2, Second Direction;

[0103] 1000Z, trolley frame; 100Z, handrail; 110Z, upper handrail; 111Z, first support tube; 112Z, push handle tube; 120Z, lower handrail; 121Z, second support tube; 130Z, height adjustment locking mechanism; 131Z, second locking assembly; 1311Z, second locking element; 13111Z, locking tooth; 1312Z, drive element; 132Z, first locking part; 133Z, second locking part; 1331Z, bottom second locking part; 1332Z, middle second locking part; 1333Z, top second locking part; 1341Z, cover; 1342Z, through space; 135Z, third reset element; 136Z, support base; 13 61Z, First guide section; 1363Z, First pushing slope; 1364Z, Second pushing slope; 1365Z, First through-passage; 1366Z, Second through-passage; 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 crossbar; 220Z, Rear wheel frame; 221Z, Rear rod; 222Z, Rear crossbar; 230Z, Wheel seat; 230AZ, Front wheel seat; 230BZ, Rear wheel seat; 240Z Wheel; 240AZ, front wheel; 240BZ, rear wheel; 300Z, release mechanism; 310Z, first release element; 311Z, first connecting part; 320Z, second release element; 321Z, second connecting part; 330Z, operating element; 331Z, first drive unit; 332Z, second drive unit; 333Z, third drive unit; 334Z, fourth drive unit; 340Z, mounting base; 350Z, safety lock; 351Z, first linkage element; 3511Z, first abutment part; 3512Z, third abutment part; 352Z, second linkage element; 3521Z, second abutment part; 3522Z, fourth abutment part; 353Z, actuating element; 3531Z, pushing part ; 354Z, Third clearance part; 360Z, Fourth reset part; 370Z, Fifth reset part; 381Z, First fixing cover; 3811Z, Operating hole; 382Z, Second fixing cover; 400Z, First pivot seat; 500Z, Wheel locking mechanism; 510Z, First locking part; 520Z, First locking recess; 530Z, Second reset part; 540Z, First traction part; 600Z, Driver folding locking mechanism; 610Z, Engaging part; 620Z, Second locking recess; 630Z, Fixing seat; 640Z, First reset part; α1, First included angle; α2, Second included angle; α3, Third included angle; α4, Fourth included angle; F1, First direction; F2, Second direction. Detailed Implementation

[0104] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0105] Figure 1 and Figure 2 This illustration shows a stroller frame 1000X according to some embodiments of the present invention. The overall structure of the stroller frame 1000X is generally symmetrical from left to right, and it may include a handlebar frame 200X, a wheel frame 300X, and a height adjustment locking mechanism 400X (see...). Figure 7 and Figure 8 ), 500X locking mechanism (see) Figure 3 and Figure 4 The present invention also includes a release mechanism 100X provided according to some embodiments of the present invention. The following description, while describing the trolley frame 1000X, will also detail the handrail 200X, wheel frame 300X, height adjustment locking mechanism 400X, folding locking mechanism 500X, and release mechanism 100X.

[0106] See also Figure 1 and Figure 2 The stroller frame 1000X can be used as a frame for a child stroller, pet stroller, or cargo stroller. The wheel frame 300X and the handlebar frame 200X are pivotally connected to each other, allowing the stroller frame 1000X to switch between an extended state and a folded state (in other embodiments, the folded state may also be referred to as a folded state or a folded state). Specifically, the handlebar frame 200X includes an upper handlebar frame 210X and a lower handlebar frame 220X that are movable relative to each other, with the end of the lower handlebar frame 220X remote from the upper handlebar frame 210X pivotally connected to the wheel frame 300X. More specifically, the wheel frame 300X includes a front wheel frame 310X and a rear wheel frame 320X that are pivotally connected, with the lower handlebar frame 220X pivotally connected to one of the front wheel frame 310X and the rear wheel frame 320X. For example, in this embodiment, the lower handlebar frame 220X is pivotally connected to the front wheel frame 310X. The specific structures of the 300X wheel frame (including the 310X front wheel frame and the 320X rear wheel frame) and the 200X rider frame (including the 210X upper rider frame and the 220X lower rider frame) will be further explained below.

[0107] See Figure 1 and Figure 2In one embodiment, the front wheel frame 310X has a U-shaped structure, including front rods 311X on the left and right sides and a front crossbar 312X connecting the two front rods 311X. The front crossbar 312X extends generally along a first direction F1, which corresponds to the left-right direction. When the stroller frame 1000X is used as the frame of a child stroller, the front crossbar 312X can also be used as a footrest.

[0108] In one embodiment, at least one front wheel mount 313X is mounted on the bottom of the front wheel carrier 310X. Specifically, in this embodiment, as... Figure 1 and Figure 2 As shown, two front wheel seats 313X are mounted on 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 mounted on 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 used to mount the front wheel 610X so that the trolley frame 1000X is movable. Of course, in another alternative embodiment, the front wheel frame 310X can also have other implementations, such as the front wheel frame 310X including only two front rods 311X, with one end of the two front rods 311X connected to form a V-shaped structure, and a front wheel seat 313X can be centrally mounted on the bottom of the front wheel frame 310X. Alternatively, for example, the front wheel frame 310X may consist of only two front struts 311X arranged approximately parallel to each other in the left-right direction, and the two front wheel seats 313X may be connected to the two front struts 311X respectively.

[0109] It should be noted that, unless otherwise explicitly specified and limited, the directional terms such as "left" and "right" for the trolley frame 1000X in various embodiments of this utility model are based on the "left" and "right" orientations of the trolley frame 1000X during normal operation, and the "left" and "right" directions are schematically indicated by arrows L and R in the figures. These directional terms are only used to make the description of the embodiments of this utility model clearer and are not intended to unduly limit the scope of protection of this utility model.

[0110] In one embodiment, the rear wheel carrier 320X can also be, for example, U-shaped, including two rear struts 321X located on the left and right sides and a rear crossbar (not shown) connecting the two rear struts 321X, the crossbar extending along a first direction F1. Of course, in another alternative embodiment, the rear wheel carrier 320X can have other implementations, for example, the rear wheel carrier 320X may include only two rear struts 321X, with one end of the two rear struts 321X connected to form a V-shape. Specifically, see... Figure 1 and Figure 2In 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 connecting the two rear rods 321X. This improves the structural stability of the rear wheel frame 320X. Specifically, the bottom ends of the two rear rods 321X are respectively provided with rear wheel seats 323X. Each rear wheel seat 323X is used to install the rear wheel 620X to make the trolley frame 1000X movable. In this embodiment, the size of the rear wheel 620X is larger than the size of the front wheel 610X to make the overall structure of the trolley frame 1000X more stable. Of course, in another alternative embodiment, the size of the rear wheel 620X may be the same as or larger than the size of the front wheel 610X.

[0111] Specifically, in this embodiment, the upper ends of the two rear links 321X are pivotally connected to the front links 311X on the same side, forming pivot points. This means that the rear links 321X on the same side can rotate relative to the front links 311X on the same side around the corresponding pivot points. In this way, the volume of the wheel frame 300X can be changed.

[0112] See Figure 1 and Figure 2 The trolley frame 200X includes an upper frame 210X and a lower frame 220X, which are movable relative to each other. For example, the upper frame 210X can slide and engage with the lower frame 220X, thus changing the height of the trolley frame 200X relative to the ground to facilitate gripping by users of different heights and improve the applicability of the trolley frame 1000X. Specifically, the upper frame 210X has a U-shaped structure, including 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 has a U-shaped structure and is connected between the two first support tubes 211X for users to grip and push the trolley frame 1000X. More specifically, the dismounting scaffold 220X includes, for example, two second support tubes 221X. The upper ends of the two second support tubes 221X are respectively slidably sleeved with the first support tube 211X on the same side, and the lower ends of the two second support tubes 221X are respectively pivotally connected with the front member 311X on the same side. It should be noted that the slidable sleeve of the two second support tubes 221X with the first support tube 211X on the same side includes two implementations: 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 principle of their cooperation is specifically explained using the example of the second support tube 221X being sleeved outside the first support tube 211X.

[0113] To prevent the handframe 200X from rotating freely relative to the wheel frame 300X and to ensure the trolley frame 1000X remains stably in the extended state, in one embodiment, the handframe 200X and wheel frame 300X can be restricted or allowed to pivot relative to each other via a retraction locking mechanism 500X. Furthermore, to prevent the upper handframe 210X from moving freely relative to the lower handframe 220X and to ensure the handframe 200X remains stably at a specific height, in one embodiment, the upper handframe 210X and lower handframe 220X can be restricted or allowed to move relative to each other via a height adjustment locking mechanism 400X. The specific structure and working principle of the retraction locking mechanism 500X and the height adjustment locking mechanism 400X will be further described below.

[0114] See Figure 3 and Figure 4 In one embodiment, the retraction locking mechanism 500X includes a first locking member 510X and a fixing member 520X. The fixing member 520X has a locking recess 521X and is installed in one of the wheel frame 300X or the undercarriage frame 220X. The first locking member 510X is movably disposed in the other of the wheel frame 300X or the undercarriage 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 undercarriage frame 220X. Alternatively, when the fixing member 520X is disposed on the undercarriage 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 undercarriage frame 220X. When the first locking member 510X is inserted into the locking recess 521X (see...) Figure 3 The dismount handrail 220X is restricted from pivoting relative to the wheel frame 300X. When the first locking member 510X disengages from the locking recess 521X (see...) Figure 4 The 220X lower frame can pivot relative to the 300X wheel frame.

[0115] In one embodiment, the retraction locking mechanism 500X further includes a first traction member 530X (see...) Figure 3 and Figure 4 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 retract from the locking recess 521X by pulling the first traction member 530X.

[0116] In one embodiment, the retraction locking mechanism 500X further includes a third elastic element (not shown in the figure), which abuts between the first locking member 510X and the unloading handle 220X, for driving the first locking member 510X to reset so that the third elastic element constantly has a tendency to insert into the locking recess 521X. Specifically, the third elastic element may be, for example, an elastic element with elasticity such as a spring or a sheet.

[0117] In this embodiment, in order to improve the stability of the folding and locking mechanism 500X when locking, the trolley frame 1000X is provided with two folding and locking mechanisms 500X, and the aforementioned folding and locking mechanism 500X is provided between the front rod 311X and the second support tube 221X on the same side.

[0118] See Figures 5 to 8 In one embodiment, the height adjustment locking mechanism 400X includes a rider locking component 410X and a locking hole 420X. One of the upper handframe 210X and the lower handframe 220X is provided with the locking hole 420X, and the other is provided with the rider locking component 410X. Specifically, in this embodiment, the second support tube 221X of the lower handframe 220X is provided with the locking hole 420X, and the first support tube 211X of the upper handframe 210X is provided with the rider locking component 410X. The rider locking component 410X can engage with the locking hole 420X. Therefore, when the first support tube 211X and the corresponding second support tube 221X move relative to each other so that the rider locking component 410X is aligned with the locking hole 420X, the rider locking component 410X is inserted into the locking hole 420X to lock the upper handframe 210X and the lower handframe 220X. More specifically, multiple locking holes 420X are provided, and the multiple locking holes 420X are spaced apart along the sliding direction of the upper frame 210X relative to the lower frame 220X. In this way, when the rider locking assembly 410X is inserted into different locking holes 420X, the upper frame 210X can be kept at different heights relative to the lower frame 220X.

[0119] See Figure 7 and Figure 8 In one embodiment, as described above, the rider locking assembly 410X is disposed in the first support tube 211X of the upper frame 210X. The rider locking assembly 410X includes a movable member 411X and a second locking member 412X. The movable member 411X is movably disposed in the first support tube 211X of the upper frame 210X. Specifically, the movable member 411X has a guide groove 4111X, which extends obliquely relative to the moving direction of the movable member 411X. The second locking member 412X has a guide post (not shown), which extends into and slides into the guide groove 4111X to be able to extend into or retract from the locking hole 420X. Specifically, in one embodiment, as... Figure 7 and Figure 8 As shown, the rider locking assembly 410X also includes a support base 413X, which is fixedly disposed within the first support tube 211X. A second locking member 412X is movably disposed on the support base 413X to extend into or retract from the locking hole 420X. More specifically, the rider locking assembly 410X also includes a fourth elastic member 414X (see...). Figure 8 The fourth elastic element 414X abuts between the support base 413X and the moving element 411X, and is used to drive the moving element 411X to reset so that the second locking element 412X has a constant tendency to be inserted into the locking hole 420X. Specifically, the fourth elastic element 414X may also be an elastic element with elasticity, such as a spring or a sheet.

[0120] 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 move the moving member 411X by pulling the second traction member 430X, thereby indirectly driving the second locking member 412X to disengage from the locking hole 420X.

[0121] In this embodiment, in order to improve the stability of the height adjustment locking mechanism 400X when locking, the trolley frame 1000X is provided with two height adjustment locking mechanisms 400X, and the aforementioned height adjustment locking mechanism 400X is provided between the first support tube 211X and the second support tube 221X on the same side.

[0122] To improve the convenience for users in releasing the locking mechanism 500X and the height adjustment locking mechanism 400X, in some embodiments provided by this utility model, the releasing mechanism 100X can perform releasing operations on both the locking mechanism 500X and the height adjustment locking mechanism 400X. Specifically, as... Figure 9 and Figure 10As shown, the release mechanism 100X includes a first release member 110X, a second release member 120X, and an operating member 130X. The first release member 110X is rotatably mounted on the trolley frame 1000X, for example, on the handlebar frame 200X or the wheel frame 300X. The first release member 110X is drivenly connected to the retraction locking mechanism 500X to allow the lower handlebar frame 220X to pivot relative to the wheel frame 300X. Specifically, the first release member 110X is drivenly connected to the first locking member 510X in the retraction locking mechanism 500X. The second release member 120X is rotatably mounted on the trolley frame 1000X, for example, on the handlebar frame 200X or the wheel frame 300X. The second release member 120X is drivenly connected to the height adjustment locking mechanism 400X to allow the upper handlebar frame 210X to move relative to the lower handlebar frame 220X. Specifically, the second release member 120X is drivenly connected to the movable member 411X in the height adjustment locking mechanism 400X. The operating member 130X is movably mounted on the trolley frame 1000X and is adapted to drive either the first release member 110X or the second release member 120X to rotate.

[0123] Since the first unlocking member 110X is rotatably mounted on the trolley frame 1000X and drivenly connected to the first locking member 510X, and the second unlocking member 120X is rotatably mounted on the trolley frame 1000X and drivenly 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, the user can control the rotation of the first unlocking member 110X by driving the movement of the operating member 130X, thereby indirectly controlling the first locking member 510X in the closing and locking mechanism 500X. When the first locking member 510X is inserted into the locking recess 521X, the trolley frame 1000X can remain in the unfolded state. When the first locking member 510X is retracted from the locking recess 521X, the trolley frame 1000X can switch from the unfolded state to the locked state. Simultaneously, the user can control the rotation of the second release element 120X by moving the drive operating element 130X, thereby indirectly controlling the moving element 411X and the second locking element 412X in the height adjustment locking mechanism 400X. When the second locking element 412X is inserted into the locking hole 420X, the upper frame 210X and the lower frame 220X cannot slide relative to each other. When the second locking element 412X is removed from the locking hole 420X, the upper frame 210X and the lower frame 220X can slide relative to each other, thus making the height of the frame 200X adjustable. Because the user only needs to operate the aforementioned release mechanism 100X to control different locking mechanisms separately, the user's operational convenience is improved.

[0124] To facilitate user operation of the 100X release mechanism, such as Figures 9 to 11As shown, the locking mechanism 100X is mounted on the pusher tube 212X of the upper frame 210X. Specifically, the first locking member 110X and the second locking member 120X are both disc-shaped and rotatably mounted on the pusher tube 212X via connecting members such as pins. More specifically, the first locking member 110X has a first connecting portion 111X, which is offset from the rotation center of the first locking member 110X. For example, it can be arranged in a straight line or in a non-linear shape, but it is not limited to this. The first connecting portion 111X is used to connect the closing locking mechanism 500X. Specifically, combined with Figure 3 , Figure 12 and Figure 13 The first connecting part 111X is connected to the first locking member 510X in the retraction locking mechanism 500X via the first traction member 530X. When the first releasing member 110X rotates around its rotation center, the first connecting part 111X will rotate synchronously around the rotation center of the first releasing member 110X, thereby driving the first traction member 530X to move and pull the first releasing member 110X to move and retract from the locking recess 521X. Similarly, the second releasing member 120X is provided with a second connecting part 121X, and the rotation centers of the second connecting part 121X and the second releasing member 120X are offset. For example, they can be arranged in a straight line or in a non-linear shape, but this is not a limitation. The second connecting part 121X is used to connect the height adjustment locking mechanism 400X. Specifically, in conjunction with Figure 14 and Figure 15 The second connecting part 121X is connected to the moving part 411X in the height adjustment locking mechanism 400X via the second traction member 430X. When the second releasing member 120X rotates around its rotation center, the second connecting part 121X will rotate synchronously around the rotation center of the second releasing member 120X, which will drive the second traction member 430X to move and pull the moving part 411X to move. Under the action of the guide groove 4111X, it will drive the first locking member 510X to move and disengage from the locking hole 420X.

[0125] Specifically, in this embodiment, both the first traction member 530X and the second traction member 430X can be, for example, traction ropes. More specifically, the first release member 110X is provided with two first connecting portions 111X, and the second release member 120X is provided with two second connecting portions 121X. 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 release member 110X rotates, the two first locking members 510X can be moved simultaneously to disengage from the corresponding locking recesses 521X. When the second release member 120X rotates, the two moving members 411X can be moved simultaneously, thereby controlling the two second locking members 412X to disengage from the corresponding locking holes 420X.

[0126] See Figure 9 as well as Figures 12 to 15 The release mechanism 100X also includes a safety lock 140X (in other embodiments, the safety lock 140X may also be referred to as a frame retraction safety lock 140X). The safety lock 140X is movably mounted on the trolley frame 1000X and can switch between a first position and a second position. When the safety lock 140X is pushed to the first position, the operating member 130X is driven connected to the first release member 110X via the safety lock 140X. When the safety lock 140X is pushed to the second position, the operating member 130X is driven connected to the second release member 120X via the safety lock 140X. Specifically, when the user needs to release the retraction locking mechanism 500X to switch the trolley frame 1000X from an unfolded state to a retracted state, the safety lock 140X can be moved to the first position, so that the first release member 110X can be rotated by operating the operating member 130X. When the user needs to release the height adjustment locking mechanism 400X so that the height of the rider frame 200X is adjustable, the safety lock 140X can be moved to the second position. In this way, the second release element 120X can be rotated by operating the operating element 130X.

[0127] See Figures 12 to 15 In one embodiment, the safety lock 140X includes a toggle member 141X, a first linkage member 142X, and a second linkage member 143X. The toggle member 141X is movably mounted on the trolley frame 1000X (e.g., push handle tube 212X) along a first direction F1 and can switch between a first position and a second position. The first linkage member 142X is movably connected to the toggle member 141X along a second direction F2 and is drivenly connected to a first release member 110X. The second linkage member 143X is movably connected to the toggle member 141X along a second direction F2 and is drivenly connected to a second release member 120X. The first direction F1 intersects the second direction F2, and the operating member 130X is movable relative to the trolley frame 1000X along the second direction F2. Specifically, when the actuating 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, thereby causing the first release member 110X to rotate. When the actuating 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, thereby causing the second release member 120X to rotate.

[0128] See also Figures 12 to 15 In one embodiment, the first linkage 142X has a first abutment portion 1421X, and the second linkage 143X has a second abutment portion 1431X. The operating member 130X has a first driving portion 131X and a second driving portion 132X spaced apart. Figure 12 and Figure 13As shown, when the actuating member 141X is in the first position, the first abutting part 1421X is positioned opposite the first driving part 131X, and the second abutting part 1431X is misaligned with the second driving part 132X. Thus, when the operating member 130X moves upward along the second direction F2, the first driving part 131X abuts against the first abutting part 1421X, thereby pushing the first linkage member 142X to move along the second direction F2, which in turn drives the first unlocking member 110X to rotate, ultimately releasing the closing locking mechanism 500X. Simultaneously, because the second abutting part 1431X and the second driving part 132X are misaligned, when the operating member 130X moves upward along the second direction F2, the second driving part 132X will not contact the second abutting part 1431X, thus allowing the second linkage member 143X and the second unlocking member 120X to remain stationary. This means that 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 actuating member 141X is in the second position, the second abutting part 1431X is positioned opposite the second driving part 132X, and the first abutting part 1421X is misaligned with the first driving part 131X. Thus, when the operating member 130X moves upward along the second direction F2, the second driving part 132X can abut against the second abutting part 1431X, thereby pushing the second linkage member 143X to move along the second direction F2, which in turn drives the second unlocking member 120X to rotate, ultimately releasing the height adjustment locking mechanism 400X. Simultaneously, because the first abutting part 1421X and the first driving part 131X are misaligned, when the operating member 130X moves upward along the second direction F2, the first driving part 131X will not contact the first abutting part 1421X, thus allowing both the first linkage member 142X and the first unlocking member 110X to remain stationary. This means that when the operating member 130X is operated, it will not affect the closing locking mechanism 500X.

[0129] See you again 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 linkage member 142X and the second linkage member 143X are spaced apart, and a third clearance portion 144X is formed between them. Specifically, the first linkage member 142X further includes a third abutment portion 1422X, and the second linkage member 143X further includes a fourth abutment portion 1432X. Figure 12 and Figure 13As shown, when the actuating member 141X is in the first position, the third abutting part 1422X is positioned against the third driving part 133X, the first abutting part 1421X is positioned against the first driving part 131X, and the fourth driving part 134X is positioned against the third clearance part 144X. Therefore, when the operating member 130X moves upward along the second direction F2, the first driving part 131X can abut against the first abutting part 1421X, and the third abutting part 1422X can abut against the third driving part 133X, thereby simultaneously pushing the first linkage member 142X to move along the second direction F2. At the same time, as the operating member 130X moves upward along the second direction F2, the fourth driving part 134X gradually inserts into the third clearance part 144X, preventing the second linkage member 143X from moving when the actuating member 141X is in the first position. Figure 14 and Figure 15 As shown, when the actuating member 141X is in the second position, the fourth abutting part 1432X is positioned against the fourth driving part 134X, the second abutting part 1431X is positioned against the second driving part 132X, and the third driving part 133X is positioned against the third clearance part 144X. Therefore, when the operating member 130X moves upward along the second direction F2, the second driving part 132X can abut against the second abutting part 1431X, and the fourth abutting part 1432X can abut against the fourth driving part 134X, thereby simultaneously pushing the second linkage member 143X to move along the second direction F2. At the same time, as the operating member 130X moves upward along the second direction F2, the third driving part 133X gradually inserts into the third clearance part 144X, preventing the first linkage member 142X from moving when the actuating member 141X is in the second position.

[0130] See Figure 12 and Figure 14 In one embodiment, the unlocking mechanism 100X further includes a first elastic element 150X. The first elastic element 150X abuts against the trolley frame 1000X (e.g., push handle tube 212X) and the actuating element 141X, providing an elastic restoring force to the actuating element 141X to hold it in a first or second position. For example, when the first elastic element 150X is used to constantly hold the actuating element 141X in the first position, if the locking mechanism 500X needs to be unlocked, the operating element 130X can be directly operated (e.g., pressed or pushed upwards). If the height adjustment locking mechanism 400X needs to be unlocked, the actuating element 141X needs to be moved to the second position first, and then the operating element 130X can be operated. After the height adjustment locking mechanism 400X is unlocked, the actuating element 141X is released, and under the reset action of the first elastic element 150X, the actuating element 141X automatically returns to the first position.

[0131] In one embodiment, such as Figure 12 and Figure 14As shown, a first clearance portion 1423X is formed between the first abutting portion 1421X and the third abutting portion 1422X. A second clearance portion 1433X is formed between the second abutting portion 1431X and the fourth abutting portion 1432X. Specifically, when the actuating member 141X is in the first position and the operating member 130X is operated, the second clearance portion 1433X is used to clear the second driving portion 132X. When the actuating member 141X is in the second position and the operating member 130X is operated, the first clearance portion 1423X is used to clear the first driving portion 131X.

[0132] In one embodiment, one of the first linkage 142X and the first release member 110X 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 within the first guide recess, and the first guide recess extends along a first direction F1. Similarly, one of the second linkage 143X and the second release member 120X 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 within the second guide recess, and the second guide recess extends along a first direction F1. Thus, when the actuating 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 along the first direction F1 simultaneously, so that the first release member 110X and the second release member 120X remain 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 release 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 release member 120X to rotate.

[0133] In one embodiment, the operating member 130X has an initial position when it moves in the second direction F2 (see...). Figure 12 and Figure 14 ) and release position (see Figure 13 and Figure 15When the operating member 130X is in the initial position, it can be operated to move and push against the first linkage 142X or the second linkage 143X. In other words, when the operating member 130X is in the initial position, there can be a gap or just contact between the first driving part 131X and the first abutment part 1421X, and between the third driving part 133X and the third abutment part 1422X (or between the second driving part 132X and the second abutment part 1431X, and between the fourth driving part 134X and the fourth abutment part 1432X) on the operating member 130X. This allows the first linkage 142X (or the second linkage 143X) to move upward by pushing or pressing the operating member 130X. When the operating member 130X is in the unlocked position, it pushes against the first linkage 142X or the second linkage 143X.

[0134] See Figures 11 to 13 In one embodiment, the release mechanism 100X further includes a second elastic element 160X, which abuts between the trolley frame 1000X and the operating member 130X, providing an elastic restoring force to the operating member 130X to hold it in its initial position. The second elastic element 160X can also be, for example, a spring or a sheet spring, or other elastic element with elasticity. Specifically, in this embodiment, such as... Figure 9 and Figure 11 As shown, the second elastic element 160X is a spring, and the operating element 130X is provided with a limiting post 135X. The spring is sleeved outside the limiting post 135X, and its two ends abut against the operating element 130X and the push tube 212X respectively.

[0135] See Figure 9 and Figure 11In one embodiment, one of the first unlocking member 110X and the trolley 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 corresponding other side wall of the first stop recess 2121X. This allows control over the rotation direction of the first unlocking member 110X, preventing the first unlocking member 110X from being unable to pull the first locking member 510X away from the locking recess 521X due to rotation not following the preset direction. Furthermore, 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 push handle tube 212X is provided with a first stop recess 2121X, and the first release member 110X is provided with a first stop protrusion 112X. Similarly, one of the second release member 120X and the trolley 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 release 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 release member 120X can be controlled, avoiding the second release member 120X from being unable to pull the moving member 411X to move by the second traction member 430X when rotating due to not rotating in the preset direction. Furthermore, the distance between the two opposing sidewalls of the second stop recess 2122X defines the range of rotation of the second stop protrusion 122X about the rotation center of the second release member 120X. Specifically, the push handle tube 212X is provided with the second stop recess 2122X, and the second release member 120X is provided with the second stop protrusion 122X.

[0136] See Figure 6 and Figure 11In one embodiment, the release mechanism 100X further includes a first fixing cover 171X and a second fixing cover 172X. The first fixing cover 171X covers the top of the push handle tube 212X, and the second fixing cover 172X covers the bottom of the push handle tube 212X. The second fixing cover 172X has a through hole for the operating member 130X to pass through. The first fixing cover 171X and the second fixing cover 172X are connected and fixed to the push handle tube 212X. In this way, the operating member 130X and other components can be limited to prevent them from detaching from the push handle tube 212X. In addition, by covering the first release member 110X, the second release member 120X, and the safety lock 140X with the first fixing cover 171X and the second fixing cover 172X, the release mechanism 100X and the trolley frame 1000X can be simplified and aesthetically improved. Specifically, as Figure 6 As shown, the first fixed cover 171X is provided with an operation hole 1711X, and the toggle member 141X is provided with a pushing part 1411X. The pushing part 1411X can pass through the operation hole 1711X so that the user can hold it. The user can change the position of the toggle member 141X by pushing the pushing part 1411X.

[0137] Figure 16 and Figure 17 The illustration shows a stroller frame 1000Y according to some embodiments of the present invention. The overall structure of the stroller frame 1000Y is generally symmetrical from left to right, and it can be used as a frame for a children's stroller, pet stroller, or cargo cart. For example, in this embodiment, the stroller frame 1000Y is used as a frame for a children's stroller to illustrate its structure and working principle.

[0138] See Figures 16 to 18 In one embodiment, the stroller frame 1000Y may include, for example, a rider frame 100Y, a wheel frame 200Y, and a reversing locking mechanism 300Y (see...). Figure 19 and Figure 20 ), 400Y locking mechanism (see) Figure 19 and Figure 20 The present invention also includes a release mechanism 500Y provided according to some embodiments of the present invention. Since the trolley frame 1000Y has a symmetrical structure, the following description will mainly take one side as an example, and while describing the trolley frame 1000Y in detail, the handrail 100Y, wheel frame 200Y, reversing locking mechanism 300Y, closing locking mechanism 400Y and release mechanism 500Y will also be described.

[0139] See also Figures 16 to 18 In one embodiment, the rider frame 100Y is rotatably mounted on the wheel frame 200Y, such that the rider frame 100Y can rotate relative to the wheel frame 200Y to change direction; or, the rider frame 100Y can rotate relative to the wheel frame 200Y to fold, so that the trolley frame 1000Y can be in the unfolded state (see...). Figure 16 and Figure 18 ) and the folded state (in other embodiments, the folded state may also be referred to as the folded state or the folded state) (see Figure 23 and Figure 24 Switching between ) . In one embodiment, such as Figures 16 to 18 As shown, the rider frame 100Y and the wheel frame 200Y are pivotally connected at the first pivot point A1, so that the rider frame 100Y has a first usage position relative to the wheel frame 200Y (see...). Figure 16 The first and second usage positions are not shown in the figure. Specifically, the handframe 100Y can pivot relative to the first pivot point A1, so that the handframe 100Y can switch between the first and second usage positions. Considering the orientation of the cart frame 1000Y, in this embodiment, when the handframe 100Y is in the first usage position, the top of the handframe 100Y is located on the first side of the wheel frame 200Y. When the handframe 100Y is in the second usage position, the top of the handframe 100Y is located on the second side of the wheel frame 200Y. The first and second sides are positioned opposite each other relative to the travel direction (i.e., the front-to-back direction) of the cart frame 1000Y.

[0140] It should be noted that, unless otherwise explicitly specified and limited, the directional terms such as "left," "right," "front," and "rear" of the trolley frame 1000Y in various embodiments of this utility model are based on the "left," "right," "front," and "rear" positions of the trolley frame 1000Y when it is in its first use position and in normal driving. Furthermore, "left" and "right" are schematically indicated by arrows L and R, and "front" and "rear" are schematically indicated by arrows P and B in the figures. These directional terms are only used to make the description of the embodiments of this utility model clearer and are not intended to unduly limit the scope of protection of this utility model.

[0141] See Figure 16 and Figure 17 In one embodiment, the frame 100Y is, for example, U-shaped, comprising support tubes 110Y on the left and right sides and a pusher tube 120Y connecting the two support tubes 110Y. The support tubes 110Y are straight tubes, and the pusher tube 120Y is U-shaped and connected between the two support tubes 110Y, for the user to grip and push the trolley frame 1000Y. Specifically, the pusher tube 120Y is connected to the top end of the support tubes 110Y, and the bottom end of the support tubes 110Y is pivotally connected to the wheel frame 200Y at a first pivot point A1. Of course, in other embodiments, the support tubes 110Y may be non-straight tubes, or the pusher tube 120Y may be straight tubes; no specific limitation is made here.

[0142] See Figures 16 to 18In 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. The front wheel frame 210Y is pivotally connected to the rear wheel frame 220Y, forming 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 trolley frame 1000Y. Wheels 270Y are connected to the bottom of both 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 handlebar frame 100Y. Specifically, the first end of the first transmission member 230Y is pivotally connected to the handlebar frame 100Y, forming the aforementioned first pivot point A1, and the second end of the first transmission member 230Y is pivotally connected to the rear wheel frame 220Y, forming a third pivot point A3. Therefore, considering wheel frame 200Y, the aforementioned "first side" can be regarded as the side of rear wheel frame 220Y that is away from front wheel frame 210Y, and the "second side" can be regarded as the side of front wheel frame 210Y that is away from rear wheel frame 220Y.

[0143] In one embodiment, the stroller frame 1000Y also includes a seat assembly (not shown) mounted on the wheel frame 200Y for a child to sit on. When the stroller frame 100Y is in the first use position (see...), Figure 16 and Figure 18 When the user wants to move the stroller frame 1000Y using the handlebar 100Y, the user must stand behind the stroller frame 1000Y to hold the handlebar 100Y, with their back to the child's face. When the handlebar 100Y is in the second use position, if the user wants to move the stroller frame 1000Y using the handlebar 100Y, the user must stand in front of the stroller frame 1000Y to hold the handlebar 100Y, with their face towards the child's face.

[0144] To prevent the rider frame 100Y from rotating arbitrarily relative to the wheel frame 200Y for reversing; in other words, to ensure the rider frame 100Y can be stably maintained in a first or second use position, in one embodiment, the rider frame 100Y and the wheel frame 200Y can be restricted or allowed to rotate relative to the wheel frame 200Y for reversing operations by means of a reversing locking mechanism 300Y. Specifically, in this embodiment, to improve the stability of the reversing locking mechanism 300Y when locked, the trolley frame 1000Y is provided with two reversing locking mechanisms 300Y, located on the left and right sides of the trolley frame 1000Y respectively.

[0145] Please combine Figure 16 , Figure 19 and Figure 20In one embodiment, a reversing locking mechanism 300Y is disposed between the rider frame 100Y and the wheel frame 200Y. The reversing locking mechanism 300Y may include a first locking member 310Y, a first engaging member 320Y, and a second engaging member 330Y. The first engaging member 320Y and the second engaging member 330Y are circumferentially spaced on the wheel frame 200Y around a first pivot point A1. The first locking member 310Y is disposed on the rider frame 100Y and is adapted to engage with either 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 rider frame 100Y is in a first operating position. When the first locking member 310Y engages with the second engaging member 330Y, the rider frame 100Y is in a second operating position.

[0146] Please combine 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. One of the locking portion 311Y and the locking portion 301Y can be a protrusion, and the other can be a groove; the protrusion and the groove can be locked together by a convex-concave interlocking mechanism. Specifically, the first locking member 310Y is movably disposed on the 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 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 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 on the support tube 110Y of the frame 100Y and can slide along the length of the support tube 110Y so that it can move between the first locking position and the first unlocking position.

[0147] Please combine Figure 16 , Figure 21 and Figure 22In one embodiment, the reversing locking mechanism 300Y may further include a first driving member 340Y and a first traction member 350Y. The first driving member 340Y is movably mounted on the rider frame 100Y and connected to the first locking member 310Y, while the first traction member 350Y is connected to the first driving member 340Y. Thus, the first driving member 340Y can be moved by the first traction member 350Y, thereby causing 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 mounted within the inner cavity of the rider frame 100Y, and the first driving member 340Y is fixedly connected to the first locking member 310Y via a first connecting member 360Y (such as a shaft or pin) passing through the rider frame 100Y. It should be noted that since both the support tube 110Y and the pusher tube 120Y are hollow tubular structures, the "inner cavity of the frame 100Y" can refer to the tubular inner cavity of the support tube 110Y and / or the pusher tube 120Y. By placing the first drive component 340Y and the first traction component 350Y within the inner cavity of the frame 100Y, not only is space utilization improved, but the appearance of the frame 100Y is also made neater and more aesthetically pleasing.

[0148] In one embodiment, such as Figure 21 and Figure 22 As shown, a fixed support seat 130Y is provided in the inner cavity of the rider frame 100Y. Specifically, the fixed support seat 130Y is disposed inside the support tube 110Y and is used to support the first drive member 340Y. In one embodiment, the reversing locking mechanism 300Y further includes a first reset member 370Y, which may be an elastic reset member such as a spring or a sheet. The first reset member 370Y abuts between the first drive member 340Y and the fixed support seat 130Y, and is used to drive the first drive member 340Y to reset, so that the first drive member 340Y constantly has a tendency to drive the first locking member 310Y to the first locked position. In this way, when the tension on the first traction member 350Y is no longer present, the first drive 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 locked position.

[0149] In one embodiment, when the rider frame 100Y is pivoted about the first pivot point A1, the rider frame 100Y also has a third usage position relative to the wheel frame 200Y. Specifically, as... Figure 16 and Figure 18 As shown, when the handcart frame 100Y is in the first use position, the handcart frame 100Y is moved away from the wheel frame 200Y around the first pivot point A1, so that the cart frame 1000Y is in the unfolded state. Figure 23 and Figure 24As shown, when the handcart frame 100Y is in the third use position, the handcart frame 100Y and the wheel frame 200Y move closer to each other around the first pivot point A1 so that the cart frame 1000Y is in the folded state.

[0150] Please combine Figure 16 , Figure 19 , Figure 20 as well as Figure 25 In one embodiment, the wheel frame 200Y further includes a handrail 240Y, a second transmission member 250Y, and a third transmission member 260Y. The tops of the front wheel frame 210Y and the rear wheel frame 220Y are both pivotally connected to the handrail 240Y, forming the aforementioned second pivot point A2 on the handrail 240Y. The first end of the second transmission member 250Y is pivotally connected to the front wheel frame 210Y, forming a fourth pivot point A4. The second end of the second transmission member 250Y extends towards the rear wheel frame 220Y and is pivotally connected to the first end of the third transmission member 260Y, forming a fifth pivot point A5. The second end of the third transmission member 260Y is pivotally connected to the handrail 240Y, forming a sixth pivot point A6. The second transmission component 250Y can be used to support the aforementioned seat assembly. When a child is sitting on the seat assembly, their arms can be placed on the armrest component 240Y. This not only improves the comfort of the ride, but also restricts the child's riding space and prevents the child from falling off the seat assembly.

[0151] Specifically, please combine Figure 19 , Figure 20 as well as Figure 25 In this embodiment, the third transmission member 260Y and the 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 passes through the first transmission member 230Y and is fixedly connected to the frame 100Y via a fixing member (not shown in the figure). It should be noted that in this embodiment, the connection point between the third transmission member 260Y and the 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.

[0152] Please combine Figure 16 , Figure 17 , Figure 19 as well as Figure 20In this embodiment, when the handlebar frame 100Y is fixed relative to the first transmission member 230Y, the third transmission member 260Y is also relatively fixed to the first transmission member 230Y, meaning the third transmission member 260Y cannot rotate around the first pivot point A1. Thus, the handlebar 240Y, rear wheel frame 220Y, first transmission member 230Y, and third transmission member 260Y remain relatively fixed. Simultaneously, the third transmission member 260Y is also relatively fixed to the second transmission member 250Y, which is stably supported between the front wheel frame 210Y and the rear wheel frame 220Y. Therefore, the trolley frame 1000Y can be stably maintained in the unfolded state. When the handlebar frame 100Y rotates relative to the first transmission member 230Y around the first pivot point A1, the handlebar frame 100Y can drive the third transmission member 260Y to rotate simultaneously around the fifth pivot point A5 and the sixth pivot point A6 via the fixing member. During this process, the handrail 100Y can also drive the first transmission component 230Y to pivot around the third pivot point A3; simultaneously, the third transmission component 260Y can also drive the handlebar component 240Y to rotate around the second pivot point A2, and at the same time drive the second transmission component 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, ultimately realizing the folding of the trolley frame 1000Y. For details regarding the folding process of the trolley frame 1000Y, please refer to the following description.

[0153] To prevent the rider frame 100Y from rotating arbitrarily relative to the wheel frame 200Y for retraction, in other words, to ensure the rider frame 100Y can be stably maintained in a first or third use position, in one embodiment, the rider frame 100Y and the wheel frame 200Y can be restricted or allowed to rotate relative to the wheel frame 200Y for retraction by a retraction locking mechanism 400Y. Specifically, in this embodiment, to improve the stability of the retraction locking mechanism 400Y when locked, the trolley frame 1000Y is provided with two retraction locking mechanisms 400Y, located on the left and right sides of the trolley frame 1000Y respectively.

[0154] Please see Figure 19 and Figure 20 In one embodiment, a retraction locking mechanism 400Y is disposed between the rider frame 100Y and the wheel frame 200Y. The retraction locking mechanism 400Y includes a second locking member 410Y, which 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 may 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 19This restricts the pivoting of the third transmission member 260Y relative to the first transmission member 230Y, and also restricts the pivoting of the frame 100Y relative to the first transmission member 230Y, ultimately restricting the switching of the frame 100Y between the first and third use positions. 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 This allows the third drive member 260Y to pivot relative to the first drive member 230Y, and also allows the rider frame 100Y to pivot relative to the first drive member 230Y, ultimately allowing the rider frame 100Y to switch between the first use position and the third use position.

[0155] In one embodiment, the first transmission member 230Y has a first recess (not shown) and a second recess (not shown). Specifically, both the first and second recesses are located at the end of the first transmission member 230Y near the first pivot point A1, and are arranged approximately circumferentially opposite to each other along the first pivot point A1. When the trolley frame 1000Y is in the unfolded state, the second locking member 410Y engages with the first recess (see figure). Figure 19 This keeps the trolley frame 1000Y in the extended state. When the trolley frame 1000Y is in the retracted state, the second locking member 410Y engages with the second recess (see...). Figure 26 This is to keep the stroller frame 1000Y in the folded state and prevent the stroller frame 1000Y from being accidentally unfolded during transportation or storage.

[0156] Please combine Figure 19 , Figure 20 , Figure 27 and Figure 28In one embodiment, the retraction locking mechanism 400Y further includes a second drive assembly 420Y and a second traction member 430Y. The second drive assembly 420Y is movably mounted on the frame 100Y and drives the second locking member 410Y. The second traction member 430Y is connected to the second drive assembly 420Y. Thus, the second drive assembly 420Y can be moved by the second traction member 430Y, thereby moving the second locking member 410Y. Specifically, the second drive assembly 420Y includes a second sliding sleeve 421Y and a second drive member 422Y. The second sliding sleeve 421Y is sleeved on the support tube 110Y of the frame 100Y and can slide along the length of the support tube 110Y. The second sliding sleeve 421Y can abut against or connect with the second locking member 410Y. The second driving member 422Y is movably mounted on the fixed support 130Y within the inner cavity of the frame 100Y, and is connected to the second sliding sleeve 421Y via a second connecting member 450Y (such as a shaft or pin) passing through the frame 100Y. The second traction member 430Y is movably mounted within the inner cavity of the 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 move the second sliding sleeve 421Y, thereby driving the second locking member 410Y to move from the second locked position to the second unlocked position.

[0157] Please combine Figure 19 , Figure 20 as well as Figure 27 and Figure 28 In one embodiment, the closing and 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 sheet springs. For example, Figure 27 and Figure 28 As shown, the second reset member 440Y abuts between the second drive member 422Y and the fixed support 130Y, and is used to drive the second drive member 422Y to reset. The fifth reset member provides an elastic restoring force biased towards the second locked position for the second locking member 410Y. Specifically, in this embodiment, the second sliding sleeve 421Y drives the second locking member 410Y to move from the second locked position to the second unlocked position by pushing. Therefore, when the second drive 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 unlocked position to the second locked position under the elastic restoring force of the fifth reset member. Thus, when the tension on the second traction member 430Y is no longer present, 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 so as to disengage from the second locking member 410Y. The second locking member 410Y can automatically move to the second locking position under the reset force of the fifth reset member.

[0158] The following diagrams briefly illustrate the folding process of the 1000Y stroller frame.

[0159] Please combine Figure 16 , Figure 17 , Figure 19 as well as Figure 20 In this embodiment, when the trolley frame 1000Y is in the unfolded state, the second locking member 410Y is in the second locked position and extends into the first recess of the third transmission member 260Y to restrict the rotation of the third transmission member 260Y and the handlebar frame 100Y relative to the first transmission member 230Y around the first pivot point A1, and simultaneously restrict the rotation of the third transmission member 260Y relative to the first transmission member 230Y. In this way, the first transmission member 230Y can form a fixed four-bar linkage structure with the third transmission member 260Y, the handlebar member 240Y, and the rear wheel frame 220Y, and the second transmission member 250Y can also be stably supported between the front wheel frame 210Y and the rear wheel frame 220Y, so that the trolley frame 1000Y remains in the unfolded state. Specifically, the links 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 two adjacent and connected links are relatively fixed.

[0160] When the trolley frame 1000Y needs to be switched 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 retracts from the first recess of the third transmission member 260Y. In this way, both the trolley frame 100Y and the third transmission member 260Y can rotate counterclockwise relative to the first transmission member 230Y about the first pivot point A1. When both the trolley frame 100Y and the third transmission member 260Y can rotate relative to the first transmission member 230Y, a movable four-bar linkage is formed between the handlebar member 240Y, the rear wheel frame 220Y, the first transmission member 230Y, and the third transmission member 260Y (or the trolley frame 100Y), and two adjacent and connected links can pivot relative to each other. In this way, the retraction of the rider frame 100Y relative to the wheel frame 200Y and the retraction of the wheel frame 200Y itself can be achieved through the movable four-bar linkage structure (i.e., the relative retraction of components such as the front wheel frame 210Y, the rear wheel frame 220Y, and the handlebar 240Y).

[0161] Specifically, please see Figure 19 and Figure 20During the folding process, when both the rider frame 100Y and the third transmission member 260Y can rotate counterclockwise relative to the first transmission member 230Y around the first pivot point A1, the rider frame 100Y will drive the second end of the first transmission member 230Y to rotate clockwise around the third pivot point A3. Simultaneously, the third transmission member 260Y will rotate counterclockwise around the sixth pivot point A6 to drive the handlebar member 240Y to rotate clockwise around the second pivot point A2 to approach the rear wheel frame 220Y for folding. Furthermore, when the third transmission member 260Y rotates around the first pivot point A1 (or the fifth pivot point A5), it will also drive the first end of the second transmission member 250Y to rotate clockwise around the fourth pivot point A4, pulling the front wheel frame 210Y closer to the rear wheel frame 220Y for folding. It should be noted that in this embodiment, as... Figure 23 , Figure 26 and Figure 27 As shown, when the trolley frame 100Y is in the retracted state, the second recess on the second transmission member 250Y is opposite to the second locking member 410Y. When the second drive member 422Y is activated by the second reset member 440Y, the second sliding sleeve 421Y can be reset and separated from the second locking member 410Y. Thus, under the elastic reset force of the fifth reset member, the second locking member 410Y can move to the second locking position to extend into the second recess for locking, thereby restricting the trolley frame 1000Y from unfolding.

[0162] To improve the convenience for users in releasing the reversing locking mechanism 300Y and the retracting locking mechanism 400Y, in some embodiments of this utility model, the release mechanism 500Y can perform release operations on both the reversing locking mechanism 300Y and the retracting locking mechanism 400Y. Specifically, the release mechanism 500Y can be driven connected to both the reversing locking mechanism 300Y and the retracting locking mechanism 400Y to allow the rider frame 100Y to rotate relative to the wheel frame 200Y for reversing or retracting operations. Specifically, as... Figure 16 and Figure 17 As shown, the release mechanism 500Y is mounted on the rider frame 100Y. More specifically, it is mounted on the push handle tube 120Y of the rider frame 100Y for user convenience. Of course, in other embodiments, the release mechanism 500Y may also be mounted on the support rod or the wheel frame 200Y; no specific limitation is made here.

[0163] Please combine Figure 16 , Figure 21 and Figure 28In one embodiment, the release mechanism 500Y includes a first release member 510Y, a second release member 520Y, and an operating member 530Y. The first release member 510Y is rotatably mounted on the rider frame 100Y and drivenly connected to the reversing locking mechanism 300Y to allow the rider frame 100Y to rotate relative to the wheel frame 200Y for reversing. Specifically, the first release member 510Y is drivenly connected to a first drive member 340Y in the reversing locking mechanism 300Y. The second release member 520Y is drivenly connected to a second drive member 422Y in the retraction locking mechanism 400Y to allow the rider frame 100Y to rotate relative to the wheel frame 200Y for retraction. Specifically, the second release member 520Y is rotatably mounted on the rider frame 100Y and drivenly connected to the retraction locking mechanism 400Y. The operating element 530Y is movably mounted on the rider frame 100Y and selectively drives the first release element 510Y or the second release element 520Y to rotate. It should be noted that in other embodiments, the first release element 510Y may also be driven connected to the retraction locking mechanism 400Y, and the second release element 520Y may be driven connected to the reversing locking mechanism 300Y; no specific limitations are imposed here.

[0164] Since the first release member 510Y is rotatably mounted on the frame 100Y and drivenly connected to the first drive member 340Y, and the second release member 520Y is rotatably mounted on the frame 100Y and drivenly connected to the second drive member 422Y, and the operating member 530Y is movable and used to drive either the first release member 510Y or the second release member 520Y to rotate, the user can control the rotation of the first release member 510Y by driving the operation member 530Y, thereby indirectly controlling the first drive member 340Y and the first locking member 310Y in the retraction locking mechanism 400Y. When the first locking member 310Y is in the first locked position, the locking part 311Y of the first locking member 310Y engages and locks with the locking part 301Y of the first engaging member 320Y or the second engaging member 330Y, and the 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 part 311Y of the first locking member 310Y disengages from the locking part 301Y of the first engaging member 320Y or the second engaging member 330Y to release the lock, allowing the cart frame 100Y to freely switch between the first and second use positions. Simultaneously, the user can control the rotation of the second unlocking member 520Y by moving the drive operating member 530Y, thereby indirectly controlling the second drive assembly 420Y and the second locking member 410Y in the retraction locking mechanism 400Y. When the second locking member 410Y is in the second locking position, the cart frame 1000Y is restricted to switching between the unfolded and retracted states; that is, the cart frame 1000Y can remain in either the unfolded or retracted state. When the second locking member 410Y is in the second unlocking position, the cart frame 1000Y is allowed to switch between the unfolded and retracted states. Because users only need to operate the aforementioned release mechanism 500Y to control different locking mechanisms, the ease of operation for users is improved.

[0165] Please combine Figure 21 and 28 to Figure 32In one embodiment, both the first release member 510Y and the second release member 520Y can be disc-shaped, and are rotatably mounted on the push tube 120Y of the rider frame 100Y via a shaft or pin. Specifically, the push tube 120Y has a mounting base 140Y, on which the first release member 510Y and the second release member 520Y are rotatably mounted. The first release member 510Y has a first connecting portion 511Y, which is offset from the rotation center of the first release member 510Y. 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 511Y is used to connect to the reversing locking mechanism 300Y. Specifically, the first connecting portion 511Y is connected to the first driving member 340Y via the first traction member 350Y. When the operating member 530Y drives the first release member 510Y to rotate around its rotation center, the first connecting part 511Y will rotate synchronously around the rotation center of the first release member 510Y, thereby driving the first traction member 350Y to move and pull the first driving member 340Y to move, ultimately driving the first locking member 310Y to move from the first locked position to the first unlocked position. Similarly, the second release member 520Y is provided with a second connecting part 521Y, which is offset from the rotation center of the second release member 520Y. For example, it can be arranged in a straight line or in a non-linear shape, but it is not limited to this. The second connecting part 521Y is used to connect the closing locking mechanism 400Y. Specifically, the second connecting part 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 release member 520Y to rotate around its rotation center, the second connecting part 521Y will rotate synchronously around the rotation center of the second release member 520Y, thereby driving the second traction member 430Y to move to pull the second drive assembly 420Y to move, and finally pushing or driving the second locking member 410Y to move from the second locking position to the second release position.

[0166] Specifically, in this embodiment, such as Figure 21 and Figure 28 As shown, both the first traction member 350Y and the second traction member 430Y can be, for example, traction ropes. More specifically, the first release member 510Y has two first connecting portions 511Y, and the second release member 520Y has 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 release member 510Y rotates, it can simultaneously control the release of the two reversing locking mechanisms 300Y. When the second release member 520Y rotates, it can simultaneously control the release of the two closing locking mechanisms 400Y.

[0167] Please continue reading 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 mounted on the rider frame 100Y and can switch between a first position and a second position. When the safety lock 540Y is in the first position (see...), Figure 22 The operating element 530Y is driven to connect with the first release element 510Y via the safety lock 540Y. When the safety lock 540Y is in the second position (see...), Figure 28 The operating element 530Y is driven to the second release element 520Y via the safety lock 540Y. Specifically, when the user needs to release the reversing locking mechanism 300Y to change the usage direction of the cart frame 100Y, the safety lock 540Y can be moved to the first position, thus allowing the first release element 510Y to rotate by operating the operating element 530Y. When the user needs to release the retraction locking mechanism 400Y to switch the cart frame 1000Y between the extended and retracted states, the safety lock 540Y can be moved to the second position, thus allowing the second release element 520Y to rotate by operating the operating element 530Y.

[0168] See also Figure 21 , Figures 28 to 32 In one embodiment, the safety lock 540Y includes a first linkage 541Y, a second linkage 542Y, and a toggle member 543Y. The first linkage 541Y is driven to a first release member 510Y; the second linkage 542Y is driven to a second release member 520Y; and the toggle member 543Y is connected to both the first linkage 541Y and the second linkage 542Y. The toggle member 543Y is movably mounted on the rider frame 100Y and can switch between a first position and a second position to move the first linkage 541Y and the second linkage 542Y along a first direction F1. Specifically, when the toggle member 543Y is in the first position, the operating member 530Y is operated to push the first linkage member 541Y to move along the second direction F2, thereby causing the first release member 510Y to rotate; when the toggle member 543Y is in the second position, the operating member 530Y is operated to push the second linkage member 542Y to move along the second direction F2, thereby causing the second release member 520Y to rotate, and the first direction F1 intersects the second direction F2.

[0169] See you again Figure 21 , Figures 28 to 32In one embodiment, the first linkage 541Y has a first abutment portion 5411Y, and the second linkage 542Y has a second abutment portion 5421Y. The operating member 530Y has a first driving portion 531Y and a second driving portion 532Y spaced apart. When the actuating member 543Y is in the first position, the first abutment portion 5411Y is positioned opposite the first driving portion 531Y, and the second abutment 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 abutment portion 5411Y, thereby pushing the first linkage 541Y to move along the second direction F2, thereby driving the first unlocking member 510Y to rotate, and finally realizing the unlocking of the reversing locking mechanism 300Y. Meanwhile, because the second abutment portion 5421Y and the second drive portion 532Y are misaligned, when the operating member 530Y moves upward along the second direction F2, the second drive portion 532Y will not contact the second abutment portion 5421Y. This allows both the second linkage member 542Y and the second release member 520Y to remain stationary, meaning that when the operating member 530Y is operated, it will not affect the closing and locking mechanism 400Y. Similarly, when the actuating member 543Y is in the second position, the second abutment portion 5421Y is positioned opposite the second drive portion 532Y, and the first abutment portion 5411Y is misaligned with the first drive portion 531Y. Thus, when the operating member 530Y moves upward along the second direction F2, the second drive portion 532Y can abut against the second abutment portion 5421Y, thereby pushing the second linkage member 542Y to move along the second direction F2, which in turn drives the second release member 520Y to rotate, ultimately releasing the closing and locking mechanism 400Y. At the same time, since the first abutting part 5411Y and the first driving part 531Y are misaligned, when the operating member 530Y moves upward along the second direction F2, the first driving part 531Y will not contact the first abutting part 5411Y, thereby allowing the first linkage member 541Y and the first unlocking member 510Y to remain stationary. That is, when the operating member 530Y is operated, it will not affect the closing and locking mechanism 400Y.

[0170] Please see Figures 29 to 32In one embodiment, the operating member 530Y further includes 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 clearance portion 544Y is formed between them. Specifically, the first linkage member 541Y also has a third abutting portion 5412Y, and the second linkage member 542Y also has a fourth abutting portion 5422Y. When the actuating member 543Y is in the first position, the third abutting portion 5412Y is located opposite the third driving portion 533Y, the first abutting portion 5411Y is located opposite the first driving portion 531Y, and the fourth driving portion 534Y is located opposite the third clearance portion 544Y. Therefore, when the operating member 530Y moves upward along the second direction F2, the first driving part 531Y abuts against the first abutting part 5411Y, and the third abutting part 5412Y abuts against the third driving part 533Y, thereby simultaneously pushing the first linkage member 541Y to move along the second direction F2. At the same time, as the operating member 530Y moves upward along the second direction F2, the fourth driving part 534Y gradually inserts into the third clearance part 544Y, preventing the second linkage member 542Y from moving when the toggle member 543Y is in the first position. Similarly, when the toggle member 543Y is in the second position, the fourth abutting part 5422Y is positioned opposite the fourth driving part 534Y, the second abutting part 5421Y is positioned opposite the second driving part 532Y, and the third driving part 533Y is positioned opposite the third clearance part 544Y. Therefore, when the operating member 530Y moves upward along the second direction F2, the second driving part 532Y can abut against the second abutting part 5421Y, and the fourth abutting part 5422Y can abut against the fourth driving part 534Y, thereby simultaneously pushing the second linkage member 542Y to move along the second direction F2. At the same time, as the operating member 530Y moves upward along the second direction F2, the third driving part 533Y gradually inserts into the third clearance part 544Y, preventing the first linkage member 541Y from moving when the toggle member 543Y is in the second position.

[0171] In one embodiment, a first clearance portion is formed between the first abutting portion 5411Y and the third abutting portion 5412Y. A second clearance portion is formed between the second abutting portion 5421Y and the fourth abutting portion 5422Y. Specifically, when the actuating member 543Y is in the first position and the operating member 530Y is operated, the second clearance portion is used to clear the second driving portion 532Y. When the actuating member 543Y is in the second position and the operating member 530Y is operated, the first clearance portion is used to clear the first driving portion 531Y.

[0172] See Figure 21 , Figure 28 and Figure 29In one embodiment, the release mechanism 500Y further includes a third reset member 550Y, which can be an elastic element such as a spring or sheet. The third reset member 550Y abuts against the handlebar frame 100Y (e.g., pusher tube 120Y) and the actuating member 543Y, providing an elastic restoring force to the actuating member 543Y to keep it in a first or second position. For example, in this embodiment, the third reset member 550Y is used to constantly keep the actuating member 543Y in the first position. If the release of the reversing locking mechanism 300Y is required, the operating member 530Y can be operated directly (e.g., pressed or pushed upward). If the release of the retracting locking mechanism 400Y is required, the actuating member 543Y must first be moved to the second position before operating the operating member 530Y. After the retracting locking mechanism 400Y is released, the actuating member 543Y is released, and under the reset action of the third reset member 550Y, the actuating member 543Y automatically resets to the first position.

[0173] In one embodiment, one of the first linkage 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 within the first guide recess, and the first guide recess extends along a first direction F1. Similarly, one of the second linkage 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 within the second guide recess, and the second guide recess extends along a first direction F1. Thus, when the actuating member 543Y switches between the first position and the second position along the first direction F1, it can drive the first linkage member 541Y and the second linkage member 542Y to move left and right along the first direction F1 simultaneously, so that the first release member 510Y and the second release member 520Y remain stationary; at the same time, when the first linkage member 541Y moves up and down along the second direction F2, the first linkage member 541Y can also drive the first release member 510Y to rotate; and when the second linkage member 542Y moves up and down along the second direction F2, the second linkage member 542Y can also drive the second release member 520Y to rotate.

[0174] 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 it moves in the second direction F2 (see...). Figure 21 and Figure 32 ) and unlock location (see Figure 22 and Figure 28When the operating member 530Y is in the initial position, it can be moved to push the first linkage 541Y or the second linkage 542Y. In other words, when the operating member 530Y is in the initial position, there can be a gap or just enough contact between the first driving part 531Y and the first abutting part 5411Y, and between the third driving part 533Y and the third abutting part 5412Y (or between the second driving part 532Y and the second abutting part 5421Y, and between the fourth driving part 534Y and the fourth abutting part 5422Y) on the operating member 530Y. This allows the first linkage 541Y (or the second linkage 542Y) to move upwards by pushing or pressing the operating member 530Y. When the operating member 530Y is in the unlocked position, it pushes the first linkage 541Y or the second linkage 542Y.

[0175] Specifically, such as Figure 21 , Figure 22 , Figure 28 as well as Figure 32 As shown, when the actuating 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 part 531Y and the first abutting part 5411Y, and between the third driving part 533Y and the third abutting part 5412Y. At this time, the operating member 530Y can be pushed upward or pressed to move to the unlocked position, and in the process, it pushes against the first linkage member 541Y, causing the first linkage member 541Y to drive the first unlocking member 510Y to rotate. When the actuating 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 part 532Y and the second abutting part 5421Y, and between the fourth driving part 534Y and the fourth abutting part 5422Y on the operating member 530Y in the initial position. At this time, the operating member 530Y can be pushed or pressed upward to move to the unlocked position, and in the process, it pushes against the second linkage member 542Y, so that the second linkage member 542Y drives the second release member 520Y to rotate.

[0176] See Figure 21 and Figure 29 In one embodiment, the release mechanism 500Y further includes a fourth reset member 560Y, which may be an elastic element such as a spring or a sheet. The fourth reset member 560Y abuts between the mounting base 140Y of the rider frame 100Y and the operating member 530Y, and provides an elastic restoring force to the operating member 530Y to keep the operating member 530Y in its initial position.

[0177] See Figure 21 and Figure 31In one embodiment, the release mechanism 500Y further includes a first fixing cover 571Y and a second fixing cover 572Y. The first fixing cover 571Y covers the top of the push handle tube 120Y, and the second fixing cover 572Y covers the bottom of the push handle tube 120Y. The second fixing cover 572Y has a through hole for the operating member 530Y to pass through. The first fixing cover 571Y and the second fixing cover 572Y are connected and fixed to the push handle tube 120Y. In this way, the operating member 530Y and other components can be limited to prevent them from detaching from the push handle tube 120Y. In addition, by covering the first releasing member 510Y, the second releasing member 520Y, and the safety lock 540Y with the first fixing cover 571Y and the second fixing cover 572Y, the release mechanism 500Y and the trolley frame 1000Y can be simplified and aesthetically improved. Specifically, as shown in the figure... Figure 21 As shown, the first fixed cover 571Y is provided with an operation hole 5711Y, and the toggle member 543Y is provided with a pushing part 5431Y. The pushing part 5431Y can pass through the operation hole 5711Y so that the user can hold it. The user can change the position of the toggle member 543Y by pushing the pushing part 5431Y.

[0178] The aforementioned trolley frame 1000Y and its locking mechanism 500Y have the following technical advantages:

[0179] The aforementioned trolley frame 1000Y includes a release mechanism 500Y. In the release mechanism 500Y, a first release member 510Y is rotatably mounted on the trolley frame 1000Y and drivenly connected to a reversing locking mechanism 300Y; a second release member 520Y is rotatably mounted on the trolley frame 1000Y and drivenly connected to a closing locking mechanism 400Y; and an operating member 530Y is movable and used to drive either the first release member 510Y or the second release member 520Y to rotate. The reversing locking mechanism 300Y allows the rider frame 100Y to rotate relative to the wheel frame 200Y for reversing, and the closing locking mechanism 400Y allows the rider frame 100Y to rotate relative to the wheel frame 200Y for closing. Therefore, the user can control the rotation of the first release member 510Y by moving the drive member 530Y, thereby indirectly controlling the reversing locking mechanism 300Y, so that the handlebar 100Y of the trolley frame 1000Y can be reversed. Simultaneously, the user can also control the rotation of the second release member 520Y by moving the drive member 530Y, thereby indirectly controlling the retraction locking mechanism 400Y, so that the trolley frame 1000Y can switch between the extended and retracted states. Because the user only needs to operate the aforementioned release mechanism 500Y to control the different locking mechanisms, the ease of operation for the user is greatly improved.

[0180] Figure 33The illustration shows a stroller frame 1000Z according to a first embodiment of the present invention. The overall structure of the stroller frame 1000Z is generally symmetrical from left to right, and it can be used as a frame for a children's stroller, a pet stroller, or a cargo cart. For example, in this embodiment, the stroller frame 1000Z is used as a frame for a children's stroller to illustrate its structure and working principle.

[0181] Please see Figure 33 In one embodiment, the trolley frame 1000Z may include, for example, a handlebar frame 100Z, a wheel frame 200Z, a wheel seat 230Z, and a locking mechanism 300Z according to an embodiment of the present invention. Since the trolley frame 1000Z has a symmetrical structure, the following description will primarily focus on one side as an example. While describing the trolley frame 1000Z in detail, the handlebar frame 100Z, wheel frame 200Z, wheel seat 230Z, and locking mechanism 300Z will also be explained.

[0182] Please see Figures 33 to 36 In one embodiment, the wheel frame 200Z and the rider frame 100Z are pivotally connected to each other so that the entire trolley frame 1000Z is in a folded state (in other embodiments, the folded state may also be referred to as a folded state or a folded state) (see Figure 35 ) and unfolded state (see Figure 33 Specifically, the trolley frame 100Z includes an upper trolley frame 110Z and a lower trolley frame 120Z that are movable relative to each other. The end of the lower trolley frame 120Z away from the upper trolley frame 110Z is pivotally connected to the wheel frame 200Z. The wheel frame 200Z includes a front wheel frame 210Z and a rear wheel frame 220Z that are pivotally connected, wherein the lower trolley frame 120Z, the front wheel frame 210Z, and the rear wheel frame 220Z can be pivotally connected via a first pivot seat 400Z. When the trolley frame 1000Z switches from an extended state to a retracted state, the front wheel frame 210Z pivots around the first pivot seat 400Z to approach the rear wheel frame 220Z, and the lower trolley frame 120Z pivots around the first pivot seat 400Z to approach the rear wheel frame 220Z. When the trolley 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 120Z pivots around the first pivot seat 400Z to move away from the rear wheel frame 220Z. Specifically, when the trolley frame 1000Z is in the unfolded state, a first angle α1 is formed between the front wheel frame 210Z and the rear wheel frame 220Z, and a second angle α2 is formed between the lower handle 120Z and the rear wheel frame 220Z. When the trolley frame 1000Z is in the folded state, a third angle α3 is formed between the front wheel frame 210Z and the rear wheel frame 220Z, and a fourth angle α4 is formed between the lower handle 120Z and the rear wheel frame 220Z. Where α1 > α3, α2 > α4 (in combination with...). Figure 34 and Figure 35Of course, in other embodiments, the lower handrail 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 frame 200Z (including the front wheel frame 210Z and the rear wheel frame 220Z) and the handrail 100Z (including the upper handrail 110Z and the lower handrail 120Z) will be further described below.

[0183] Please see Figure 33 In one embodiment, the front wheel frame 210Z has a U-shaped structure, including front rods 211Z on the left and right sides and a front crossbar 212Z connecting the two front rods 211Z. The front crossbar 212Z extends generally along a first direction F1, which corresponds to the left-right direction. When the stroller frame 1000Z is used as the frame of a child stroller, the front crossbar 212Z can also be used as a foot pedal.

[0184] In one embodiment, at least one wheel seat 230Z (which may be referred to herein as front wheel seat 230ZA) is mounted on the bottom of the front wheel carrier 210Z. Specifically, in this embodiment, as... Figure 33 As shown, two front wheel seats 230ZA are mounted on the bottom of the front wheel carrier 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 mounted on the left and right ends of the front crossbar 212Z, and each front wheel seat 230ZA is used to mount a wheel 240Z (here referred to as the front wheel 240ZA). Of course, in another alternative embodiment, the front wheel carrier 210Z can also have other implementations. For example, the front wheel carrier 210Z may only include two front struts 211Z, with one end of the two front struts 211Z connected to form a V-shaped structure, and a front wheel seat 230ZA may be mounted centrally on the bottom of the front wheel carrier 210Z. Alternatively, for example, the front wheel carrier 210Z may only include two front struts 211Z arranged approximately parallel in the left-right direction, and the two front wheel seats 230ZA are respectively connected to the two front struts 211Z.

[0185] It should be noted that, unless otherwise explicitly specified and limited, the directional terms such as "left" and "right" in the various embodiments of this utility model refer to the "left" and "right" positions of the trolley frame 1000Z during normal operation, and are schematically indicated by arrows L and R in the figures. These directional terms are only used to make the description of the embodiments of this utility model clearer and are not intended to unduly limit the scope of protection of this utility model.

[0186] Please continue reading Figure 33In one embodiment, the rear wheel carrier 220Z may also be a U-shaped structure, including two rear struts 221Z located on the left and right sides and a rear crossbar 222Z connected between the two rear struts 221Z, the rear crossbar 222Z extending along a first direction F1. At least one wheel seat 230Z (hereinafter referred to as rear wheel seat 230BZ) is also mounted on the bottom of the rear wheel carrier 220Z. In this embodiment, two rear wheel seats 230BZ are mounted on the bottom of the rear wheel carrier 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 struts 221Z on the same side, and each rear wheel seat 230BZ is used to mount a wheel 240Z (hereinafter referred to as a rear wheel 240BZ). 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 strut 221Z on the same side) via a connecting shaft. Of course, in another alternative embodiment, the rear wheel frame 220Z can have other implementations. For example, the rear wheel frame 220Z may only include two rear struts 221Z, with one end of the two struts 221Z connected to form a V-shape, and a rear wheel seat 230BZ may be centrally mounted at the bottom of the rear wheel frame 220Z. Alternatively, for example, the rear wheel frame 220Z may only include two rear struts 221Z arranged parallel to each other in the left-right direction, and the two rear wheel seats 230BZ are respectively connected to the two rear struts 221Z.

[0187] Please see Figure 33 and Figure 34 In one embodiment, the stroller frame 1000Z further includes a wheel locking mechanism 500Z, which is disposed between the wheel frame 200Z and the wheel seat 230Z. 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 As shown, the wheel locking mechanism 500Z is disposed 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, the steering of the trolley frame 1000Z is locked, and the trolley 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, thus allowing the trolley frame 1000Z to perform steering drift operations, improving the flexibility of the trolley frame 1000Z's movement.

[0188] Please see Figure 34In one embodiment, the wheel locking mechanism 500Z includes a first locking member 510Z and a first locking recess 520Z. The wheel seat 230Z (specifically, the rear wheel seat 230BZ) is provided with the first locking recess 520Z, i.e., the first locking recess 520Z is disposed on the wheel seat 230Z. The first locking member 510Z is movably disposed on the wheel frame 200Z (specifically, the rear wheel frame 220Z) and adapted to lock into the first locking recess 520Z. Specifically, when the first locking member 510Z extends into the first locking recess 520Z to lock into 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 drifting and steering of the trolley frame 1000Z. When the first locking member 510Z retracts from the first locking recess 520Z to disengage from 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 trolley frame 1000Z to drift and turn.

[0189] Please continue reading Figure 34 In one embodiment, the wheel locking mechanism 500Z further includes a second reset member 530Z, which abuts between the rear wheel carrier 220Z and the first locking member 510Z, and provides an elastic restoring force to the first locking member 510Z so that the first locking member 510Z always has a tendency to extend into the first locking recess 520Z. The second reset member 530Z can be, for example, an elastic component such as a spring or a sheet spring.

[0190] It should be noted that, in this embodiment, in order to further improve the steering flexibility of the trolley frame 1000Z, the trolley frame 1000Z is provided with two wheel locking mechanisms 500Z, and the aforementioned wheel locking mechanism 500Z is provided between the rear rod 221Z and the rear wheel seat 230BZ on the same side.

[0191] See Figure 33 and Figure 34In one embodiment, the upper handle 110Z is movable relative to the lower handle 120Z. For example, the upper handle 110Z can be slidably sleeved with the lower handle 120Z. This allows adjustment of the overall height of the handle 100Z relative to the ground when the trolley frame 1000Z is in the unfolded state, facilitating gripping by users of different heights and improving the applicability of the trolley frame 1000Z. In one embodiment, the upper handle 110Z has a U-shaped structure, including two first support tubes 111Z and a push handle tube 112Z connected between the two first support tubes 111Z. The first support tubes 111Z are straight tubes, and the push handle tube 112Z has a U-shaped structure and is connected between the two first support tubes 111Z, providing a grip for the user to push the trolley frame 1000Z. More specifically, the scaffolding 120Z includes, for example, two second support tubes 121Z. The upper ends of the two second support tubes 121Z are respectively slidably sleeved with the lower ends of the first support tube 111Z on the same side, and the lower ends of the two second support tubes 121Z are respectively pivotally sleeved with the first pivot seat 400Z on the same side. It should be noted that the slidable sleeve of the two second support tubes 121Z with the first support tube 111Z on the same side includes two implementations: 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 principle of their cooperation is specifically explained using the example of the second support tube 121Z being sleeved outside the first support tube 111Z. In addition, it should be noted that the above-mentioned "height of the scaffolding 100Z as a whole relative to the ground" can be regarded as referring to the height of the push tube 112Z approximately vertically from the ground.

[0192] In order to stably maintain the hoist 100Z at the required height, i.e., to prevent the upper hoist 110Z from sliding freely relative to the lower hoist 120Z, in one embodiment, such as Figure 34 As shown, the hoist 100Z also includes a height adjustment locking mechanism 130Z, which is disposed between the upper hoist 110Z and the lower hoist 120Z. The upper hoist 110Z and the lower hoist 120Z can restrict or allow relative movement between them 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 hoist 110Z is fixed relative to the lower hoist 120Z, and the two cannot slide relative to each other. When the height adjustment locking mechanism 130Z is in the unlocked state, the upper hoist 110Z can slide relative to the lower hoist 120Z.

[0193] Please see Figure 34In one embodiment, the height adjustment locking mechanism 130Z includes a second locking component 131Z and a second locking part 133Z. The second locking part 133Z is disposed on the lower frame 120Z, and the second locking component 131Z is movably disposed on the upper frame 110Z and adapted to lock into the second locking part 133Z. Specifically, when the second locking component 131Z extends into the second locking part 133Z to lock in place, the upper frame 110Z is restricted from sliding relative to the lower frame 120Z. When the second locking component 131Z retracts from the second locking part 133Z to disengage, the upper frame 110Z is allowed to slide relative to the lower frame 120Z.

[0194] In this embodiment, the second locking component 131Z includes a second locking member 1311Z. Specifically, the second locking member 1311Z is disposed within the upper frame 110Z and is movable relative to the upper frame 110Z and the lower frame 120Z to have a locked position and an unlocked position. More specifically, the height adjustment locking mechanism 130Z also includes a first locking part 131, which is disposed on the upper frame 110Z. When the second locking member 1311Z is in the locked position, the second locking member 1311Z engages with the first locking part 132Z and the second locking 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 a locked state, thus fixing the overall height of the frame 100Z relative to the ground. When the second locking member 1311Z is in the unlocked position, it releases the lock on the first locking part 132Z and the second locking part 133Z, allowing 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, thus allowing the overall height of the frame 100Z to be adjusted to accommodate users of different heights. It should be noted that in this embodiment, the first locking part 132Z is ​​a slotted structure located on the first support tube 111Z in the upper frame 110Z, and the second locking part 133Z is a slotted structure located on the second support tube 121Z in the lower frame 120Z. When the second locking member 1311Z is in the locked position, it passes through the first locking part 132Z and the second locking part 133Z to lock into both. When the second locking member 1311Z is in the unlocked position, the second locking member 1311Z retracts from the second locking part 133Z to release the lock on the second locking part 133Z.

[0195] In one embodiment, multiple (e.g., two, three, or more) second locking portions 133Z are provided, and these multiple second locking portions 133Z are spaced apart along the sliding direction of the upper frame 110Z relative to the lower frame 120Z. Specifically, the multiple second locking portions 133Z can be considered as being spaced apart along the length direction of the second support tube 121Z. When the second locking member 1311Z passes through the first locking portion 132Z and engages with different second locking portions 133Z, the overall length of the frame 100Z is correspondingly different, resulting in different heights of the frame 100Z relative to the ground, to accommodate users of different heights. Specifically, please refer to... Figure 34 and Figure 44 In this embodiment, three second locking parts 133Z are provided. These three second locking parts 133Z can be referred to as the bottom second locking part 1331Z, the middle second locking part 1332Z, and the top second locking part 1333Z, respectively. 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 along the second support tube 121Z than the top second locking part 1333Z. When the second locking member 1311Z is inserted through the first locking part 132Z and the bottom second locking part 1331Z, the length of the frame 100Z is L1, and the height of the push tube 112Z from the ground is H1; when the second locking member 1311Z is inserted through the first locking part 132Z and the middle second locking part 1332Z, the length of the frame 100Z is L2, and the height of the push tube 112Z from the ground is H2; when the second locking member 1311Z is inserted through the first locking part 132Z and the top second locking part 1333Z, the length of the frame 100Z is L3, and the height of the push tube 112Z from the ground is H3; wherein, L1 < L2 < L3, H1 < H2 < H3.

[0196] Please continue reading Figure 34 In one embodiment, the second locking component 131Z further includes a drive member 1312Z, which is movable relative to the upper frame 110Z and operably connected to the second locking member 1311Z. Specifically, the drive member 1312Z has a locked position and an unlocked position on its movement path. When the drive member 1312Z is ​​in the locked position, it drives the second locking member 1311Z to the locked position. When the drive member 1312Z is ​​in the unlocked position, it drives the second locking member 1311Z to the unlocked position. In this way, the user can indirectly control the position of the second locking member 1311Z by directly controlling the position of the drive member 1312Z, thereby controlling the state of the height adjustment locking mechanism 130Z. In this embodiment, the movement direction of the drive member 1312Z is ​​approximately the same as the length direction of the first support tube 111Z.

[0197] See you again Figure 34 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 guide portion 1361Z. The extension direction of the first guide portion 1361Z is perpendicular to the movement direction of the drive member 1312Z. A 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 guide portion 1361Z. More specifically, the drive member 1312Z has a second guide portion (not shown in the figure). The second guide portion extends obliquely relative to the movement direction of the drive member 1312Z. The guide member can extend into the second guide portion and slide in cooperation with the second guide portion. When the drive member 1312Z switches between the locked position and the unlocked position, the second locking member 1311Z can switch between the locked position and the unlocked position through the cooperation of the guide member with the first guide portion 1361Z and the second guide portion. It should be noted that in this embodiment, the guide member can be, for example, a pin or similar component. Of course, in other embodiments, the second locking member 1311Z and the guide member can also be integrally formed, with the guide member considered a component of the second locking member 1311Z. For example, the guide member could be a protrusion integrally formed on the second locking member 1311Z, primarily used to pass through the first guide portion 1361Z and the second guide portion to guide the second locking member 1311Z between the locked and unlocked positions. It should also be noted that in this embodiment, both the first guide portion 1361Z and the second guide portion are through-hole structures.

[0198] In one embodiment, the height adjustment locking mechanism 130Z further includes a third reset member 135Z (see...). Figure 34 The third reset member 135Z can be, for example, an elastic element such as a spring or a sheet. Specifically, the third reset member 135Z is a compression spring, which abuts between the support base 136Z and the drive member 1312Z, and is used to provide an elastic restoring force to the drive member 1312Z so that the drive member 1312Z can be held in the locked position, thereby keeping the second locking member 1311Z in the locked position.

[0199] It should be noted that, in this embodiment, in order to improve the stability of the upper frame 110Z when it is fixed relative to the lower frame 120Z, the frame 100Z includes two height adjustment locking mechanisms 130Z. Specifically, the aforementioned height adjustment locking mechanism 130Z is provided between the first support tube 111Z and the second support tube 121Z on the same side.

[0200] Please see Figures 33 to 36 In one embodiment, the upper frame 110Z slides relative to the lower frame 120Z so that the frame 100Z as a whole has an extended state (see...). Figure 33 And a folded state (in other embodiments, the folded state may also be referred to as a closed state or a folded state, etc.) (see) Figure 35 Specifically, the length of the handcart frame 100Z in its extended state is greater than its length in its folded state. During the transition of the cart frame 1000Z to the folded state, the handcart frame 100Z can be initially in the folded state, thus further reducing its volume. In this embodiment, when the second locking member 1311Z passes through the first locking part 132Z and locks into the bottom second locking part 1331Z, the cart can be considered to be in its extended state, and at this time, the length of the handcart frame 100Z is at its shortest, L1. When the second locking member 1311Z retracts from the second locking part 133Z to release the lock on the second locking part 133Z, the upper handcart frame 110Z can slide relative to the lower handcart frame 120Z to allow the handcart frame 100Z to transition to the folded state. When the frame 100Z is in the folded state, the length of the frame 100Z is L0, and L0 < L1.

[0201] Please combine Figure 34 and Figure 36 In one embodiment, the trolley frame 1000Z further includes a rider folding and locking mechanism 600Z, which is disposed on the rider frame 100Z and adapted to lock the rider frame 100Z in a folded state. Specifically, the rider folding and 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 has the second locking recess 620Z, and the other has a movable engaging member 610Z. In other words, the second locking recess 620Z is disposed on one of the upper rider frame 110Z and the lower rider frame 120Z, and the engaging member 610Z is movably disposed on the other one. Thus, the engaging member 610Z can engage or disengage with the second locking recess 620Z to restrict or allow the rider frame 100Z to switch between a folded state and an extended state. Specifically, when the engaging member 610Z engages with the second locking recess 620Z, the trolley frame 100Z is locked in the folded state. This prevents the upper trolley frame 110Z from accidentally sliding relative to the lower trolley frame 120Z during transfer or storage, thus avoiding an increase in the overall size of the trolley frame 1000Z and making it inconvenient to transfer or store. When the engaging member 610Z disengages from the second locking recess 620Z, the trolley frame 100Z is allowed to switch to the extended state.

[0202] Please continue to combine Figure 34 and Figure 36In this embodiment, the support base 136Z is provided with a second locking recess 620Z. The lower handlebar 120Z is provided with a through hole (not shown in the figure), and the engaging member 610Z is movably inserted into the through hole so that the engaging member 610Z can engage with the second locking recess 620Z. Specifically, the handlebar folding and locking mechanism 600Z also includes a fixed base 630Z and a first reset member 640, wherein the fixed base 630Z is disposed on the lower handlebar 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 to the engaging member 610Z so that the engaging member 610Z always has a tendency to extend into the second locking recess 620Z to engage. The first reset member 640 can be, for example, an elastic component such as a spring or a spring sheet. Specifically, in this embodiment, the first reset member 640 is a compression spring, and its two ends abut against the engaging member 610Z and the fixed base 630Z.

[0203] Please see Figure 34 and Figure 36 In one embodiment, the support base 136Z is provided with a first pushing ramp 1363Z and a second pushing ramp 1364Z. When the frame 100Z switches from an extended state to a folded state, the first pushing ramp 1363Z pushes against the engaging member 610Z, guiding the engaging member 610Z into the second locking recess 620Z for engagement. The second pushing ramp 1364Z is formed on the side wall of the second locking recess 620Z. When the frame 100Z switches from a folded state to an extended state, the second pushing ramp 1364Z pushes against the engaging member 610Z, guiding the engaging member 610Z out of the second locking recess 620Z.

[0204] The following is combined with Figure 34 and Figure 36 This section briefly describes the height adjustment process of the 100Z frame and the switching process between the extended and folded states of the 100Z frame.

[0205] Please see Figure 34 In this embodiment, when the hoist 100Z is in the extended state and the height of the hoist 100Z relative to the ground needs to be adjusted, the user can first drive the second locking member 1311Z to retract from the second locking part 133Z via the driving member 1312Z. In this way, the upper hoist 110Z can slide freely relative to the lower hoist 120Z for height adjustment. After the hoist 100Z is adjusted to the correct height, the third reset member 135Z drives the driving member 1312Z to reset to the locked position, so that the second locking member 1311Z can pass through the first locking part 132Z again and extend into the second locking part 133Z. In this way, the upper hoist 110Z is restricted from sliding relative to the lower hoist 120Z, so that the hoist 100Z is maintained at the required height.

[0206] Please combine Figure 34 and Figure 36 When the user needs to switch the 100Z rider frame from the extended state to the folded state (from... Figure 34 Towards Figure 36 Similarly, the user can first drive the second locking member 1311Z to retract from the second locking part 133Z via the driving member 1312Z; then, the user can push the upper frame 110Z to move it towards the bottom of the lower frame 120Z (i.e., the bottom end of the second support tube 121Z), thus reducing the overall length of the frame 100Z to switch to the folded state. During the movement, the first abutting inclined surface 1363Z on the support base 136Z will abut against the locking member 610Z, and as the upper frame 110Z moves, it will push the locking member 610Z to gradually retract from the through hole, at which time the first reset member 640 is compressed. When the engaging member 610Z passes the first abutting ramp 1363Z and is directly opposite the second locking recess 620Z, the first resetting 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 engage with the second locking recess 620Z to restrict the sliding of the upper frame 110Z relative to the lower frame 120Z.

[0207] Please continue to combine Figure 34 and Figure 36 When the user needs to switch the 100Z rider frame from the folded state to the extended state (from... Figure 36 Towards Figure 34 (Switching) The user can directly pull the upper frame 110Z to move it away from the bottom of the lower frame 120Z, thus extending the overall length of the frame 100Z to switch to the extended state. During the application of pulling force to the upper frame 110Z, the second abutting ramp 1364Z pushes against the engaging member 610Z, causing it to gradually disengage from the second locking recess 620Z. During this process, the first reset member 640 is gradually compressed. Once the engaging member 610Z disengages from the second locking recess 620Z, the upper frame 110Z can slide relative to the lower frame 120Z to switch to the extended state.

[0208] Please see Figure 34 and Figure 36 In one embodiment, the lower frame 120Z is provided with an abutment 140Z, which is located approximately near the bottom end of the second support tube 121Z. This abutment 140Z abuts against the support seat 136Z to limit the sliding travel of the upper frame 110Z. When the frame 100Z is in the folded state, the support seat 136Z abuts against the abutment 140Z.

[0209] To improve the convenience for users in releasing the wheel locking mechanism 500Z and the height adjustment locking mechanism 130Z, the release mechanism 300Z in one embodiment of this utility model can perform release operations on both the wheel locking mechanism 500Z and the height adjustment locking mechanism 130Z. Specifically, the release mechanism 300Z can be driven connected to both the wheel locking mechanism 500Z and the height adjustment locking mechanism 130Z, allowing the wheel seat 230Z to rotate relative to the wheel frame 200Z to enable the trolley frame 1000Z to drift and turn, while also allowing the upper handlebar 110Z to move relative to the lower handlebar 120Z to change the height of the handlebar 100Z relative to the ground. Specifically, as... Figure 33 As shown, the release mechanism 300Z is mounted on the handframe 100Z. More specifically, it is mounted on the push handle tube 112Z of the upper handframe 110Z, which facilitates user operation. Of course, in other embodiments, the release mechanism 300Z may also be mounted on the first support tube 111Z, the lower handframe 120Z, or the wheel frame 200Z; no specific limitation is made here.

[0210] Please combine Figure 34 and Figure 37 In one embodiment, the release mechanism 300Z includes a first release member 310Z, a second release member 320Z, and an operating member 330Z. The first release member 310Z is rotatably mounted on the frame 100Z and drivenly connected to the wheel locking mechanism 500Z to allow the wheel seat 230Z to rotate relative to the wheel frame 200Z for drift steering. Specifically, the first release member 310Z is drivenly connected to the first locking member 510Z in the wheel locking mechanism 500Z. The second release member 320Z is rotatably mounted on the frame 100Z and drivenly connected to the height adjustment locking mechanism 130Z to allow the upper frame 110Z to move relative to the lower frame 120Z. Specifically, the second release member 320Z is drivenly connected to the driving member 1312Z in the height adjustment locking mechanism 130Z. The operating element 330Z is movably mounted on the rider frame 100Z and selectively drives the first release element 310Z or the second release element 320Z to rotate. It should be noted that in other embodiments, the first release element 310Z may also be driven to connect with the height adjustment locking mechanism 130Z, and the second release element 320Z may be driven to connect with the wheel locking mechanism 500Z; no specific limitations are imposed here.

[0211] Since the first release member 310Z is rotatably mounted on the handlebar frame 100Z and drivenly connected to the first locking member 510Z, and the second release member 320Z is rotatably mounted on the handlebar frame 100Z and drivenly connected to the drive member 1312Z, and the operating member 330Z is movable and used to drive either the first release member 310Z or the second release member 320Z to rotate, the user can control the rotation of the first release member 310Z by driving the operation member 330Z, thereby indirectly controlling the first locking member 510Z in the wheel locking mechanism 500Z. When the first locking member 510Z extends into the first locking recess 520Z to lock in place, the wheel seat 230Z is restricted from rotating relative to the wheel frame 200Z, and the trolley frame 1000Z can travel in a straight line. When the first locking member 510Z retracts from the first locking recess 520Z to disengage, the wheel seat 230Z is allowed to rotate relative to the wheel frame 200Z, and the trolley frame 1000Z can drift and steer. Simultaneously, the user can control the rotation of the second release member 320Z by moving the drive operating member 330Z, thereby indirectly controlling the second locking component 131Z (i.e., the drive member 1312Z and the second locking member 1311Z) in the height adjustment locking mechanism 130Z. Specifically, when the drive member 1312Z is ​​in the locked position, the second locking member 1311Z is correspondingly in the locked position, and the second locking member 1311Z engages with the first locking part 132Z and the second locking part 133Z to restrict the movement of the upper handrail 110Z relative to the lower handrail 120Z. When the drive component 1312Z is ​​in the unlocked position, the second locking component 1311Z is in the corresponding unlocked position. The second locking component 1311Z is unlocked from the first locking part 132Z and the second locking part 133Z, allowing the upper frame 110Z to move relative to the lower frame 120Z. Because the user only needs to operate the aforementioned unlocking mechanism 300Z to control the different locking mechanisms, the ease of operation for the user is improved.

[0212] Please see Figures 37 to 40 In one embodiment, both the first unlocking member 310Z and the second unlocking member 320Z can be disc-shaped, and both are rotatably mounted on the pusher tube 112Z of the handframe 100Z via a shaft or pin. Specifically, the pusher tube 112Z is ​​provided with a mounting base 340Z, on which the first unlocking member 310Z and the second unlocking member 320Z are rotatably mounted.

[0213] Please combine Figure 34 and Figure 37In one embodiment, the first unlocking member 310Z is provided with a first connecting portion 311Z. The first connecting portion 311Z is 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 also includes a first traction member 540Z. The first traction member 540Z is disposed in the wheel frame 200Z and the rider frame 100Z and passes through the first pivot seat 400Z and the height adjustment locking mechanism 130Z to connect 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 release member 310Z (specifically, the first connecting part 311Z), and the other end of the first traction member 540Z (i.e., the end away from the first release member 310Z) passes sequentially through the height adjustment locking mechanism 130Z and the first pivot seat 400Z and then connects to the first locking member 510Z disposed in the rear wheel frame 220Z. Thus, the first release member 310Z can drive the first locking member 510Z to retract from the first locking recess 520Z via the first traction member 540Z. For more details, please refer to... Figure 34 , Figure 37 and Figure 41 When the operating member 330Z drives the first unlocking member 310Z to rotate around its rotation center, the first connecting part 311Z will rotate synchronously around the rotation center of the first unlocking member 310Z, thereby driving the first traction member 540Z to move and pull the first locking member 510Z to move away from the first locking recess 520Z.

[0214] like Figure 34 and Figure 37 As shown, similarly, the second unlocking member 320Z is provided with a second connecting portion 321Z. The rotation center of the second connecting portion 321Z and the second unlocking member 320Z are offset, for example, they can be arranged in a straight line or in a non-linear shape, but are 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 also includes a second traction member 137Z, which is disposed in the upper frame 110Z and connected between the second unlocking member 320Z and the second locking assembly 131Z (specifically, the driving member 1312Z). Specifically, please refer to... Figure 34 , Figure 37 and Figure 42 When the operating member 330Z drives the second release member 320Z to rotate around its rotation center, the second connecting part 321Z will rotate synchronously around the rotation center of the second release 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 move from the locked position to the unlocked position.

[0215] Specifically, in this embodiment, such as Figure 34 and Figure 37 As shown, both the first traction member 540Z and the second traction member 137Z can be, for example, traction ropes. More specifically, the first release member 310Z has two first connecting portions 311Z, and the second release member 320Z has two second connecting portions 321Z. The two first connecting portions 311Z are respectively connected to the two first traction members 540Z, and the two second connecting portions 321Z are respectively connected to the two second traction members 137Z. In this way, when the first release member 310Z rotates, it can simultaneously control the release of the two wheel locking mechanisms 500Z. When the second release member 320Z rotates, it can simultaneously control the release of the two height adjustment locking mechanisms 130Z.

[0216] Please combine Figure 34 , Figure 36 and Figure 37 In this embodiment, the support base 136Z is provided with a first through-channel 1365Z and a second through-channel 1366Z. The first through-channel 1365Z is used to accommodate the first traction member 540Z, and the second through-channel 1366Z is used to accommodate the second traction member 137Z. This prevents the first traction member 540Z from becoming entangled with other components when passing through the height adjustment locking mechanism 130Z. Specifically, the first through-channel 1365Z is approximately U-shaped. The other end of the first traction member 540Z (i.e., the end furthest from the first release member 310Z) extends into the support base 136Z from one end of the U-shaped channel and then extends out from the other end, surrounding the support base 136Z and extending into the first pivot seat 400Z. The first traction member 540Z is wound around the support base 136Z, thus preventing the first traction member 540Z from becoming knotted within the height adjustment locking mechanism 130Z after the height of the frame 100Z decreases. Specifically, the second through-channel 1366Z can be roughly a straight channel. When one end of the second traction member 137Z rotates with the second release member 320Z, the other end of the second traction member 137Z can be quickly operated through the straight channel to drive the drive member 1312Z to move.

[0217] See Figures 37 to 40 In one embodiment, the release mechanism 300Z further includes a safety lock 350Z. The safety lock 350Z is movably mounted on the rider frame 100Z and can switch between a first position and a second position. When the safety lock 350Z is in the first position (see...), Figure 41 The operating element 330Z is driven to connect with the first release element 310Z via the safety lock 350Z. When the safety lock 350Z is in the second position (see...), Figure 42 The operating element 330Z is driven to connect with the second release element 320Z via the safety lock 350Z. Specifically, as shown... Figure 34 and Figure 41 As shown, when the user needs to release the wheel locking mechanism 500Z to enable the trolley frame 1000Z to drift and steer, the safety lock 350Z can be moved to the first position. Then, by operating the operating component 330Z, the first releasing component 310Z can be rotated. 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 rider frame 100Z or to switch the rider frame 100Z to the folded state, the safety lock 350Z can be moved to the second position. In this way, the second release member 320Z can be rotated by operating the operating member 330Z.

[0218] Please continue reading Figures 37 to 40 In one embodiment, the safety lock 350Z includes a first linkage 351Z, a second linkage 352Z, and a toggle member 353Z. The first linkage 351Z is driven to the first release member 310Z; the second linkage 352Z is ​​driven to the second release member 320Z; and the toggle member 353Z is connected to both the first linkage 351Z and the second linkage 352Z. The toggle member 353Z is movably mounted on the rider frame 100Z and can switch between a first position and a second position to move the first linkage 351Z and the second linkage 352Z along a first direction F1. Specifically, when the toggle member 353Z is in the first position, the operating member 330Z is operated to push the first linkage member 351Z to move along the second direction F2, causing the first release member 310Z to rotate; when the toggle member 353Z is in the second position, the operating member 330Z is operated to push the second linkage member 352Z to move along the second direction F2, causing the second release member 320Z to rotate, and the first direction F1 intersects the second direction F2.

[0219] Please combine Figure 34 , Figures 41 to 43In one embodiment, the first linkage 351Z has a first abutment portion 3511Z, and the second linkage 352Z has a second abutment portion 3521Z. The operating member 330Z has a first driving portion 331Z and a second driving portion 332Z spaced apart. When the actuating member 353Z is in the first position, the first abutment portion 3511Z is positioned opposite the first driving portion 331Z, and the second abutment portion 3521Z is misaligned with the second driving portion 332Z. Thus, when the operating member 330Z moves upward along the second direction F2, the first driving portion 331Z can abut against the first abutment portion 3511Z, thereby pushing the first linkage 351Z to move along the second direction F2, which in turn drives the first unlocking member 310Z to rotate, ultimately releasing the wheel locking mechanism 500Z. Meanwhile, because the second abutment portion 3521Z and the second drive portion 332Z are misaligned, when the operating member 330Z moves upward along the second direction F2, the second drive portion 332Z will not contact the second abutment portion 3521Z. This allows both the second linkage member 352Z and the second release member 320Z to remain stationary, meaning that when the operating member 330Z is operated, it will not affect the height adjustment locking mechanism 130Z. Similarly, when the actuating member 353Z is in the second position, the second abutment portion 3521Z is positioned opposite the second drive portion 332Z, and the first abutment portion 3511Z is misaligned with the first drive portion 331Z. Thus, when the operating member 330Z moves upward along the second direction F2, the second drive portion 332Z can abut against the second abutment portion 3521Z, thereby pushing the second linkage member 352Z to move along the second direction F2, which in turn drives the second release member 320Z to rotate, ultimately releasing the height adjustment locking mechanism 130Z. At the same time, since the first abutting part 3511Z and the first driving part 331Z are misaligned, when the operating member 330Z moves upward along the second direction F2, the first driving part 331Z will not contact the first abutting part 3511Z, thereby allowing the first linkage member 351Z and the first unlocking member 310Z to remain stationary. That is, when the operating member 330Z is operated, it will not affect the wheel locking mechanism 500Z.

[0220] Please see Figure 43In one embodiment, the operating member 330Z further includes 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 clearance portion 354Z is formed between them. Specifically, the first linkage member 351Z also has a third abutting portion 3512Z, and the second linkage member 352Z also has a fourth abutting portion 3522Z. When the actuating member 353Z is in the first position, the third abutting portion 3512Z is ​​located opposite the third driving portion 333Z, the first abutting portion 3511Z is located opposite the first driving portion 331Z, and the fourth driving portion 334Z is located opposite the third clearance portion 354Z. Therefore, when the operating member 330Z moves upward along the second direction F2, the first driving part 331Z abuts against the first abutting part 3511Z, and the third abutting part 3512Z abuts against the third driving part 333Z, thereby simultaneously pushing the first linkage member 351Z to move along the second direction F2. At the same time, as the operating member 330Z moves upward along the second direction F2, the fourth driving part 334Z gradually inserts into the third clearance part 354Z, preventing the second linkage member 352Z from moving when the actuating member 353Z is in the first position. Similarly, when the actuating member 353Z is in the second position, the fourth abutting part 3522Z is ​​positioned opposite the fourth driving part 334Z, the second abutting part 3521Z is positioned opposite the second driving part 332Z, and the third driving part 333Z is positioned opposite the third clearance part 354Z. Therefore, when the operating member 330Z moves upward along the second direction F2, the second driving part 332Z can abut against the second abutting part 3521Z, and the fourth abutting part 3522Z can abut against the fourth driving part 334Z, thereby simultaneously pushing the second linkage member 352Z to move along the second direction F2. At the same time, as the operating member 330Z moves upward along the second direction F2, the third driving part 333Z gradually inserts into the third clearance part 354Z, preventing the first linkage member 351Z from moving when the toggle member 353Z is in the second position.

[0221] In one embodiment, such as Figure 43 As shown, a first clearance portion is formed between the first abutting portion 3511Z and the third abutting portion 3512Z. A second clearance portion is formed between the second abutting portion 3521Z and the fourth abutting portion 3522Z. Specifically, when the actuating member 353Z is in the first position and the operating member 330Z is operated, the second clearance portion is used to clear the second driving member 332Z. When the actuating member 353Z is in the second position and the operating member 330Z is operated, the first clearance portion is used to clear the first driving member 331Z.

[0222] Please combine Figure 34 , Figure 37 and Figure 38 In one embodiment, the unlocking mechanism 300Z further includes a fourth reset member 360Z, which can be an elastic element such as a spring or sheet. The fourth reset member 360Z abuts against the handlebar frame 100Z (e.g., pusher tube 112Z) and the actuating member 353Z, providing an elastic restoring force to the actuating member 353Z to keep it in a first or second position. For example, in this embodiment, the fourth reset member 360Z is used to constantly keep the actuating member 353Z in the first position. If it is necessary to unlock the wheel locking mechanism 500Z, the operating member 330Z can be operated directly (e.g., pressed or pushed upward). If it is necessary to unlock the height adjustment locking mechanism 130Z, the actuating member 353Z needs to be moved to the second position first, and then the operating member 330Z can be operated. After the height adjustment locking mechanism 130Z is unlocked, the actuating member 353Z is released, and under the reset action of the fourth reset member 360Z, the actuating member 353Z automatically resets to the second position.

[0223] In one embodiment, one of the first linkage 351Z and the first release member 310Z 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 within the first guide recess, and the first guide recess extends along a first direction F1. Similarly, one of the second linkage 352Z and the second release member 320Z 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 within the second guide recess, and the second guide recess extends along a first direction F1. Thus, when the actuating member 353Z switches between the first position and the second position along the first direction F1, it can drive the first linkage member 351Z and the second linkage member 352Z to move left and right along the first direction F1 simultaneously, so that the first release member 310Z and the second release member 320Z remain stationary; at the same time, when the first linkage member 351Z moves up and down along the second direction F2, the first linkage member 351Z can also drive the first release member 310Z to rotate; and when the second linkage member 352Z moves up and down along the second direction F2, the second linkage member 352Z can also drive the second release member 320Z to rotate.

[0224] In one embodiment, the operating member 330Z has an initial position when it moves in the second direction F2 (see...). Figure 37 ) and unlock location (see Figure 41 and Figure 42When the operating member 330Z is in the initial position, it can be moved to push the first linkage 351Z or the second linkage 352Z. In other words, when the operating member 330Z is in the initial position, there can be a gap or just enough contact between the first driving part 331Z and the first abutting part 3511Z, and between the third driving part 333Z and the third abutting part 3512Z (or between the second driving part 332Z and the second abutting part 3521Z, and between the fourth driving part 334Z and the fourth abutting part 3522Z) on the operating member 330Z. This allows the first linkage 351Z (or the second linkage 352Z) to move upwards by pushing or pressing the operating member 330Z. When the operating member 330Z is in the unlocked position, it pushes the first linkage 351Z or the second linkage 352Z.

[0225] Specifically, such as Figure 37 , Figures 41 to 43 As shown, when the actuating 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 part 331Z and the first abutting part 3511Z, and between the third driving part 333Z and the third abutting part 3512Z. At this time, the operating member 330Z can be pushed upward or pressed to move to the unlocked position, and in the process, it pushes against the first linkage member 351Z, causing the first linkage member 351Z to drive the first unlocking member 310Z to rotate. When the actuating 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 part 332Z and the second abutting part 3521Z, and between the fourth driving part 334Z and the fourth abutting part 3522Z. At this time, the operating member 330Z can be pushed or pressed upward to move to the unlocked position, and in the process, it pushes against the second linkage member 352Z, causing the second linkage member 352Z to drive the second release member 320Z to rotate.

[0226] In one embodiment, such as Figure 37 and Figure 39 As shown, the release mechanism 300Z also includes a fifth reset member 370Z, which may be an elastic element such as a spring or a sheet. The fifth reset member 370Z abuts between the mounting base 340Z of the frame 100Z and the operating member 330Z, and is used to provide an elastic restoring force to the operating member 330Z so that the operating member 330Z is held in the initial position.

[0227] Please combine Figure 33 , Figures 40 to 42In one embodiment, the release mechanism 300Z further includes a first fixing cover 381Z and a second fixing cover 382Z. The first fixing cover 381Z and the second fixing cover 382Z are disposed on the upper and lower sides of the push handle tube 112Z, wherein the first fixing cover 381Z is located at the top of the push handle tube 112Z, and the second fixing cover 382Z is ​​located at the bottom of the push handle tube 112Z. The second fixing cover 382Z has a through hole for the operating member 330Z to pass through. The first fixing cover 381Z and the second fixing cover 382Z are connected and fixed to the push handle tube 112Z. This limits the movement of components such as the operating member 330Z, preventing them from detaching from the push handle tube 112Z. Furthermore, covering the first release member 310Z, the second release member 320Z, and the safety lock 350Z with the first fixing cover 381Z and the second fixing cover 382Z simplifies and improves the appearance of the release mechanism 300Z and the trolley frame 1000Z. Specifically, as... Figure 41 and Figure 42 As shown, the first fixed cover 381Z has an operating hole 3811Z, and the actuating member 353Z has a pushing part 3531Z. The pushing part 3531Z can pass through the operating hole 3811Z for the user to hold. The user can change the position of the actuating member 353Z by pushing the pushing part 3531Z. Of course, in other embodiments, such as... Figure 44 As shown, the first fixing cover 381Z and the second fixing cover 382Z are installed on the front and rear sides of the push handle tube 112Z. The first fixing cover 381Z is located on the rear side of the push handle tube 112Z, and the second fixing cover 382Z is ​​located on the front side of the push handle tube 112Z. The first fixing cover 381Z and the second fixing cover 382Z together form a through hole for the operating member 330Z to pass through. The first fixing cover 381Z is provided with an operating hole 3811Z.

[0228] Figure 45 A partial perspective view of a trolley frame 1000Z according to a second embodiment of the present invention is shown. This trolley frame 1000Z is similar to the first embodiment described above, including components such as a handlebar frame 100Z, wheel frames 200Z, wheel seats 230Z, and a locking mechanism 300Z. The trolley frame 1000Z of this embodiment is a variation of the trolley frame 1000Z of the first embodiment described above. Unless otherwise specified, the structure of the components and the connections between the components in this embodiment can be found in the description of the first embodiment above. The following mainly describes the differences between this embodiment and the first embodiment described above.

[0229] In this embodiment, "movement of the upper frame 110Z relative to the lower frame 120Z" means that the upper frame 110Z can rotate relative to the lower frame 120Z. The upper frame 110Z and the lower 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. The first connecting seat 138Z is connected to the upper frame 110Z, and the second connecting seat 139Z is connected to the lower frame 120Z and pivotally connected to the first connecting seat 138Z. The second locking member 1311Z is axially movable 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 frame 110Z to rotate relative to the lower frame. When the upper frame 110Z rotates relative to the lower frame 120Z about the height adjustment locking mechanism 130Z, the height of the upper frame 110Z (specifically, the push handle tube 112Z) relative to the ground can be changed (see...). Figure 46 This allows for a grip on the push handle tube 112Z that is suitable for users of different heights. It should be noted that in this embodiment, to clearly understand the position of the upper frame 110Z after rotation relative to the lower frame 120Z, Figure 46 The dotted lines in the middle indicate the different positions of the upper frame 110Z relative to the lower frame 120Z after rotation.

[0230] Please combine Figures 47 to 49 In this embodiment, the first connecting seat 138Z has a first chamber 1381Z on the side facing the second connecting seat 139Z, and the side wall of the first chamber 1381Z has a first locking groove 1382Z. The second connecting seat 139Z has a second chamber 1391Z on the side facing the first connecting seat 138Z, and the side wall of the second chamber 1391Z has a second locking groove (not shown in the figure). The second locking member 1311Z has locking teeth 13111Z and has a locked position and an unlocked position. Specifically, when the second locking member 1311Z is in the locked position, the locking teeth 13111Z simultaneously engage the first locking groove 1382Z and the second locking groove, thereby restricting the pivoting of the first connecting seat 138Z relative to the second connecting seat 139Z. When the second locking member 1311Z is in the unlocked position, the locking tooth 13111Z disengages from the first locking groove 1382Z or the second locking groove, thus allowing the first connecting seat 138Z to pivot relative to the second connecting seat 139Z.

[0231] Please continue reading Figures 47 to 49 In this embodiment, the height adjustment locking mechanism 130Z further includes a driving member 1312Z. The driving member 1312Z 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 passes axially through the first connecting seat 138Z and abuts against the second locking member 1311Z to drive the second locking member 1311Z to move. This allows the second locking member 1311Z to exit from the first locking groove 1382Z. Specifically, in conjunction with... Figure 42 , Figures 47 to 49 The height adjustment locking mechanism 130Z also includes a second traction member 137Z, which connects the drive member 1312Z and the second release member 320Z. When the height of the rider frame 100Z needs to be adjusted, the second release member 320Z can be rotated by operating the operating member 330Z. In this way, under the transmission action of the second traction member 137Z, the drive member 1312Z is ​​driven to move to push the second locking member 1311Z completely out of the second chamber 1391Z. Of course, in other embodiments, the drive member 1312Z can also be movably disposed on the side of the second connecting seat 139Z opposite to the first connecting seat 138Z, and the drive member 1312Z passes through the second connecting seat 139Z axially and abuts against the second locking member 1311Z to drive the second locking member 1311Z to move, so that the second locking member 1311Z can be disengaged from the second locking groove. When it is necessary to adjust the height of the rider frame 100Z, the second release member 320Z can be rotated 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 to push the second locking member 1311Z to completely retract into the first chamber 1381Z.

[0232] It should be noted that, in this embodiment, the third reset member 135Z abuts axially between the second locking member 1311Z and the second connecting seat 139Z and is used to keep the second locking member 1311Z in the locked position. Furthermore, it should be noted that, in this embodiment, when the height of the rider frame 100Z needs to be adjusted, the user can also push the second locking member 1311Z by directly operating (e.g., pressing) the drive member 1312Z, without needing to operate the operating member 330Z.

[0233] In this embodiment, the first traction member 540Z can be directly inserted 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 1341Z. The cover 1341Z may be connected to, for example, the first connecting seat 138Z or the second connecting seat 139Z, and a passage space 1342Z may be formed between the cover 1341Z and the first connecting seat 138Z or the second connecting seat 139Z, and the first traction member 540Z passes through the passage space 1342Z. Specifically, when the driving member 1312Z is ​​movably disposed on the side of the first connecting seat 138Z facing away from the second connecting seat 139Z, the cover 1341Z is disposed on the side of the second connecting seat 139Z facing away from the first connecting seat 138Z and forms the passage space 1342Z between the cover 1341Z and the second connecting seat 139Z. When the driving member 1312Z is ​​movably disposed on the side of the second connecting seat 139Z facing away from the first connecting seat 138Z, the cover 1341Z is disposed on the side of the first connecting seat 138Z facing away from the second connecting seat 139Z and forms a through space 1342Z between the cover and the first connecting seat 138Z.

[0234] The aforementioned trolley frame 1000Z and its unlocking mechanism 300Z have the following technical advantages:

[0235] The aforementioned trolley frame 1000Z includes a release mechanism 300Z. In the aforementioned release mechanism 300Z, a first release member 310Z is rotatably mounted on the trolley frame 1000Z and drivenly connected to the wheel locking mechanism 500Z, and a second release member 320Z is rotatably mounted on the trolley frame 1000Z and drivenly connected to the height adjustment locking mechanism 130Z. An operating member 330Z is movable and used to drive either the first release member 310Z or the second release member 320Z to rotate. The wheel locking mechanism 500Z allows the wheel 240Z to rotate with the wheel seat 230Z relative to the rear wheel frame 220Z for drift steering, and the height adjustment locking mechanism 130Z allows the upper handrail 110Z to move relative to the lower handrail 120Z. Therefore, the user can control the rotation of the first release member 310Z by moving the drive member 330Z, thereby indirectly controlling the wheel locking mechanism 500Z, enabling the cart frame 1000Z to have a drift steering function. Simultaneously, the user can also control the rotation of the second release member 320Z by moving the drive member 330Z, thereby indirectly controlling the height adjustment locking mechanism 130Z, making the overall height of the handframe 100Z adjustable. Because the user only needs to operate the aforementioned release mechanism 300Z to control the different locking mechanisms individually, the ease of operation for the user is greatly improved.

[0236] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0237] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A release mechanism suitable for a trolley frame, the trolley frame including an upper handle, a lower handle, wheel frames, a height adjustment locking mechanism, and a retraction locking mechanism, wherein the upper handle and the lower handle restrict or allow relative movement between them via the height adjustment locking mechanism, and the lower handle is pivotally connected to the wheel frames and restricts or allows relative pivoting between them via the retraction locking mechanism, characterized in that, The release mechanism comprises: a first release member rotatably arranged on the stroller frame and drivingly connected with the folding locking mechanism to allow the lower frame to pivot relative to the wheel frame; a second release member rotatably arranged on the stroller frame and drivingly connected with the height adjustment locking mechanism to allow the upper frame to move relative to the lower frame; and an operating member movably arranged on the stroller frame and adapted to drive either of the first and second release members to rotate.

2. The release mechanism according to claim 1, wherein: the first release member is provided with a first connecting portion which is arranged offset from the rotation center of the first release member and is used to connect the folding locking mechanism; and 3. A release mechanism adapted for use with a stroller frame, said stroller frame comprising a handle frame, a wheel frame, a direction changing locking mechanism and a folding locking mechanism, said handle frame being rotatably disposed on said wheel frame, said direction changing locking mechanism and said folding locking mechanism each being disposed between said handle frame and said wheel frame, said handle frame being capable of being restricted or allowed to rotate relative to said wheel frame for direction changing by said direction changing locking mechanism, and said handle frame being further capable of being restricted or allowed to rotate relative to said wheel frame for folding by said folding locking mechanism, characterized in that, the second release member is provided with a second connecting portion which is arranged offset from the rotation center of the second release member and is used to connect the height adjustment locking mechanism. The release mechanism comprises: a first release member rotatably arranged on the stroller frame and drivingly connected with the folding locking mechanism to allow the lower frame to pivot relative to the wheel frame; a second release member rotatably arranged on the stroller frame and drivingly connected with the height adjustment locking mechanism to allow the upper frame to move relative to the lower frame; and 4. The release mechanism of claim 1 or 3, wherein an operating member movably arranged on the stroller frame and adapted to drive either of the first and second release members to rotate.

5. The release mechanism of claim 4, wherein, The release mechanism further comprises a safety lock movably arranged 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 with the first release member through the safety lock; and when the safety lock is in the second position, the operating member is drivingly connected with the second release member through the safety lock. The safety lock comprises: a toggle member movably arranged on the stroller frame in a first direction and switchable between the first position and the second position; a first linkage member movably connected with the toggle member in a second direction and drivingly connected with the first release member; and a second linkage member movably connected with the toggle member in the second direction and drivingly connected with the second release 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 thereby rotate the first release member; and when the toggle member is in the second position, the operating member can be operated to push the second linkage member to move and thereby rotate the second release member.

6. A stroller frame characterized by, The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding.

7. A stroller frame having an extended state and a collapsed state, characterized by, The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding.

8. A release mechanism adapted for use with a stroller frame, said stroller frame comprising a handle frame, a wheel frame, a wheel mount, and a wheel locking mechanism, said handle frame comprising an upper handle frame, a lower handle frame, and a height adjustment locking mechanism disposed therebetween, said upper handle frame and said lower handle frame being limited or allowed relative movement by said height adjustment locking mechanism; said wheel mount being rotatably connected to said wheel frame, said wheel locking mechanism being disposed between said wheel frame and said wheel mount and being adapted to limit or allow rotation of said wheel mount relative to said wheel frame, characterized in that, The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding.

9. A stroller frame characterized by, The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding.

10. The stroller frame of claim 9, wherein, The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to allow the vehicle frame to rotate relative to the wheel frame for folding or unfolding. The release mechanism of claim 1, disposed on the vehicle frame and drivingly connected with the folding locking mechanism and the height adjustment locking mechanism, respectively, to When the first locking member extends into the first locking recess to lockingly engage, the wheel seat is restricted from rotating relative to the wheel carrier, and when the first releasing member drives the first locking member to retreat from the first locking recess to disengage via the first pulling member, the wheel seat is allowed to rotate relative to the wheel carrier.

11. The stroller frame of claim 10, wherein, The first pulling member is configured within the handle carrier and the wheel carrier and passes through the height adjustment locking mechanism.

12. The stroller frame of claim 11, wherein, The height adjustment locking mechanism comprises a support seat provided with a first through channel, and the first through channel is a U-shaped channel, and an end of the first pulling member away from the first releasing member extends into one port of the U-shaped channel and extends out of another port of the U-shaped channel, so that the first pulling member is arranged around the support seat.

13. The stroller frame of claim 9, wherein, The upper handle carrier is slidable relative to the lower handle carrier, and the height adjustment locking mechanism comprises: a second locking portion provided on the lower handle carrier; a second locking assembly movably arranged on the upper handle carrier and adapted to lockingly engage with the second locking portion; and a second pulling member connected between the second releasing member and the second locking assembly; When the second locking assembly extends into the second locking portion to lockingly engage, the upper handle carrier is restricted from sliding relative to the lower handle carrier, and when the second releasing member drives the second locking assembly to retreat from the second locking portion to disengage via the second pulling member, the upper handle carrier is allowed to slide relative to the lower handle carrier; or The height adjustment locking mechanism comprises: a first connecting seat connected with the upper handle carrier; a second connecting seat connected with the lower handle carrier and pivoted with the first connecting seat; and a second locking member movably arranged between the first connecting seat and the second connecting seat in an axial direction to restrict or allow relative pivoting of the two; a driving member movably arranged in the first connecting seat or the second connecting seat, the driving member passing through the first connecting seat or the second connecting seat in an axial direction and abutting against the second locking member to drive the second locking member to move; and a second pulling member connecting the driving member and the second releasing member, when the second releasing member is operated, the second pulling member drives the second locking member to move via the driving member to allow the first connecting seat to pivot relative to the second connecting seat.

14. The stroller frame according to claim 13, wherein The height adjustment locking mechanism further comprises 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 straight channel, and the second pulling member is accommodated in the straight channel; The wheel locking mechanism comprises a first pulling member configured within the wheel carrier and the handle carrier and passing through the U-shaped channel.

Images