Frame and cart

Abstract

The frame comprises a support assembly, a folding locking mechanism and a power assisting mechanism, the support assembly comprises a first support and a second support which are arranged in a relative rotation mode, and the support assembly has an unfolding state and a folding state. The folding locking mechanism comprises a first connecting piece arranged on the first support and a second connecting piece arranged on the second support. In the folding state, the first connecting piece and the second connecting piece are locked and matched to limit the first support and the second support to be far away from each other, and in the process that the power assisting mechanism is converted into the folding state from the unfolding state, the power assisting mechanism moves to the second position from the first position. After the support assembly is unlocked by the folding locking mechanism, the power assisting mechanism tends to reset to the first position and drive the support assembly to reset to the unfolded state. The frame not only can be folded for storage, but also is low in probability of accidental spreading after being folded, and can be flexibly unfolded, so that a user needs less effort to unfold the frame.

Description

Technical Field

[0001] This utility model relates to the field of children's products technology, and in particular to a frame and stroller. Background Technology

[0002] A stroller is a child product that can support and move around freely. Using a stroller to move a child not only makes it easier to care for the baby and greatly reduces the effort required, but also allows the child to get sufficient and effective rest. Existing strollers include a seat and a frame; the seat supports the child, and the frame carries the seat.

[0003] To make strollers foldable and take up less space when stored, foldable frames exist. However, existing frames are prone to accidentally opening up after folding due to insufficient restraint, and require significant manual force to reassemble them, resulting in a poor user experience. Utility Model Content

[0004] The first objective of this invention is to provide a bicycle frame that can be folded and stored, has a low probability of accidentally unfolding after folding, and can be unfolded flexibly with minimal effort required for the user to unfold the frame.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A vehicle frame includes: a support assembly comprising a first support and a second support rotatably disposed relative to each other, the support assembly having an unfolded state and a folded state; a folding locking mechanism comprising a first connector disposed on the first support and a second connector disposed on the second support; in the folded state, the first connector and the second connector are locked together to restrict the first support and the second support from moving away from each other; and an assist mechanism that moves from a first position to a second position during the transition from the unfolded state to the folded state; after the folding locking mechanism releases the lock on the support assembly, the assist mechanism has a tendency to return to the first position and drive the support assembly back to the unfolded state.

[0007] Preferably, the assist mechanism is disposed on the first connector and / or the second connector. In the second position, the assist mechanism is in a deformed state and accumulates a reset rebound force. After the first bracket and the second bracket are unlocked, the reset rebound force of the assist mechanism drives the first connector and the second connector away from each other.

[0008] Preferably, when the first connector and the second connector are locked together, the assist mechanism is located between the first connector and the second connector; the first connector and the second connector are plugged into each other, the second connector is provided with a plug-in groove, and the assist mechanism includes a first elastic member disposed at the bottom of the plug-in groove; or the assist mechanism includes a first elastic member disposed at the end of the second connector facing the first connector; when the first connector and the second connector are locked together, the assist mechanism is located at the bottom of the plug-in groove of the first connector.

[0009] Preferably, the second connector is provided with a plug-in groove and a locking hole communicating with the plug-in groove; the first connector includes a plug-in and a locking hook, the plug-in has an installation cavity, the locking hook is rotatably connected in the installation cavity, the locking hook includes a locking end and an unlocking end located outside the installation cavity, the locking end can be locked into the locking hole, and applying force to the unlocking end can drive the locking end to disengage from the locking hole.

[0010] Preferably, the assist mechanism further includes a top block, which is connected to the insertion slot via the first elastic member. The first connector can push the top block to move inward toward the insertion slot and compress the first elastic member.

[0011] Preferably, the assist mechanism is disposed on at least one of the first bracket and the second bracket; in the second position, the assist mechanism is in a deformed state and accumulates a reset rebound force; after the first bracket and the second bracket are unlocked, the reset rebound force of the assist mechanism drives the first bracket and the second bracket away from each other.

[0012] Preferably, in the locked state, the assist mechanism is located between the first bracket and the second bracket; the assist mechanism includes a rotatable lever and a second elastic member connected to the lever. During the process of the bracket assembly changing from the unfolded state to the folded state, the first connector can abut against the lever and trigger the lever to rotate; after the first connector and the second connector are unlocked, the lever pushes the first bracket to move away from the second bracket.

[0013] Preferably, the first connector includes a snap-fit ​​protrusion on the first bracket, and the second connector includes a rotatable rotating hook with a snap-fit ​​groove. The snap-fit ​​protrusion engages with the snap-fit ​​groove to lock the bracket assembly in the folded state.

[0014] Preferably, the locking grooves are provided in multiple ways, and the multiple locking grooves are spaced apart in the extension direction of the rotating hook member. The locking protrusion can selectively engage with one of the locking grooves; and / or, the second connector further includes a third elastic element connected to the rotating hook member, and the third elastic element accumulates elastic potential energy when the rotating hook member rotates; and / or, the rotating hook member is provided with an unlocking trigger surface, and the unlocking trigger surface is provided with an anti-slip structure, and applying force to the unlocking trigger surface can drive the locking protrusion to disengage from the locking groove.

[0015] The second objective of this invention is to provide a trolley that can be stably folded and stored, and flexibly unfolded for use, providing a superior user experience.

[0016] To achieve this objective, the present invention adopts the following technical solution:

[0017] A stroller includes a seat and the aforementioned frame, the seat being mounted on the frame.

[0018] The beneficial effects of this utility model are:

[0019] The frame provided by this utility model includes a support assembly, a folding locking mechanism, and an assist mechanism. The support assembly includes a first support and a second support that are rotatably arranged relative to each other. The support assembly has an unfolded state and a folded state. The folding locking mechanism includes a first connector on the first support and a second connector on the second support. In the folded state, the first and second connectors are locked together to prevent the first and second supports from moving away from each other. During the transition from the unfolded state to the folded state, the assist mechanism moves from a first position to a second position. After the folding locking mechanism releases the support assembly, the assist mechanism tends to return to the first position and drive the support assembly back to the unfolded state. This frame can not only be folded for storage with a low probability of accidental unfolding after folding, but it can also be unfolded flexibly with minimal effort required from the user. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the trolley provided by this utility model;

[0021] Figure 2 This is a side view of the trolley provided by this utility model;

[0022] Figure 3 This is a front view of the trolley provided by this utility model;

[0023] Figure 4 This is an exploded view of the vehicle frame provided in Embodiment 1 of this utility model;

[0024] Figure 5This is an exploded view of the second connector provided in Embodiment 1 of this utility model;

[0025] Figure 6 This is an exploded view of the assist mechanism provided in Embodiment 1 of this utility model;

[0026] Figure 7 This is a cross-sectional view of the vehicle frame provided in Embodiment 1 of this utility model in its unfolded state;

[0027] Figure 8 yes Figure 7 Enlarged view of section D;

[0028] Figure 9 This is a cross-sectional view of the frame provided in Embodiment 1 of this utility model in a folded state;

[0029] Figure 10 yes Figure 9 Enlarged view of section E in the middle;

[0030] Figure 11 This is a cross-sectional view of the frame provided in Embodiment 1 of this utility model when force is applied to the folding locking mechanism to release the lock on the bracket assembly;

[0031] Figure 12 yes Figure 11 Enlarged view of section F in the middle;

[0032] Figure 13 This is a cross-sectional view of the vehicle frame provided in Embodiment 1 of this utility model when the power assist mechanism drives the support assembly to be reset to the unfolded state;

[0033] Figure 14 yes Figure 13 Enlarged view of section G in the middle;

[0034] Figure 15 This is a schematic diagram of the frame provided in Embodiment 2 of this utility model in a folded state;

[0035] Figure 16 This is a schematic diagram of the vehicle frame provided in Embodiment 2 of this utility model in its unfolded state;

[0036] Figure 17 This is a schematic diagram of the folding locking mechanism locking the bracket assembly according to Embodiment 2 of this utility model;

[0037] Figure 18 This is a schematic diagram of the second embodiment of the present invention, showing the application of force to the folding locking mechanism to release the lock on the bracket assembly;

[0038] Figure 19 This is a schematic diagram of the assist mechanism drive bracket assembly being reset to the unfolded state according to Embodiment 2 of this utility model.

[0039] In the picture:

[0040] 10. Frame; 20. Seat;

[0041] 110. Bracket assembly; 111. First bracket; 112. Second bracket; 113. Base; 114. First caster; 115. Second caster; 116. Bottom support rod;

[0042] 120. Folding locking mechanism; 121. First connecting piece; 1211. Snap-fit ​​protrusion; 1212. Abutting protrusion; 122. Second connecting piece; 1221. Rotating hook piece; 12211. Snap-fit ​​groove; 12212. Third pivot hole; 12213. Unlocking trigger surface; 12214. Anti-slip structure; 1222. Third elastic element;

[0043] 12101, Connector; 12102, Locking hook; 12103, Mounting cavity; 12104, Snap-fit ​​end; 12105, Unlocking end; 12201, Connecting slot; 12202, Snap-fit ​​hole;

[0044] 130. Assist mechanism; 131. Lever; 1311. First lever; 1312. Second lever; 1313. Fourth pivot hole; 132. Second elastic element;

[0045] 1301, Top block; 1302, First elastic element. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0047] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0050] Example 1:

[0051] like Figures 1 to 3 As shown, this embodiment provides a frame 10 that can be used in strollers, such as children's strollers, cargo strollers, etc. Of course, in addition to being used in strollers, the frame 10 can also be used in other devices that require support and folding for storage, which will not be listed here.

[0052] like Figures 4 to 14As shown, the frame 10 includes a support assembly 110, a folding locking mechanism 120, and a power assist mechanism 130. The support assembly 110 is the main structure of the frame 10. The support assembly 110 includes a first support 111 and a second support 112 rotatably connected about a first axis. The support assembly 110 has an unfolded state where the first support 111 and the second support 112 are far apart, and a folded state where the first support 111 and the second support 112 are close together. The folding locking mechanism 120 includes a first connector 121 disposed on the first support 111 and a second connector 122 disposed on the second support 112. When the support assembly 110 is in the unfolded state, the first connector 121 and the second connector 122 are separated. When the support assembly 110 is in the folded state, the first connector 121 and the second connector 122 lock together to lock the support assembly 110 in the folded state, thereby preventing the first support 111 and the second support 112 from moving away from each other. The power assist mechanism 130 is linked to the folding locking mechanism 120. During the process of the bracket assembly 110 changing from the unfolded state to the folded state, the assist mechanism 130 can move from the first position to the second position; after the folding locking mechanism 120 releases the lock on the bracket assembly 110, the assist mechanism 130 has the tendency to reset to the first position and drive the bracket assembly 110 to reset to the unfolded state.

[0053] Compared to existing frames with poor folding stability and requiring significant external force from the user to unfold, the frame 10 provided in this embodiment can not only be folded for storage, but also uses a folding locking mechanism 120 to lock the first support 111 and the second support 112 that are already close together, thereby locking the support assembly 110 in a folded state and reducing the probability of the frame 10 accidentally opening after folding. Furthermore, by incorporating an assist mechanism 130, the frame 10 can activate the assist mechanism 130 during the transition of the support assembly 110 from an unfolded state to a folded state. During this activation, the assist mechanism 130 accumulates energy. Subsequently, once the folding locking mechanism 120 releases the lock on the support assembly 110, the assist mechanism 130 can drive the first support 111 and the second support 112 of the support assembly 110 to unfold quickly and flexibly, reducing the effort required for the user to unfold the frame 10 and improving the user experience.

[0054] In one specific embodiment, both the first support 111 and the second support 112 are rod-shaped structures. The top end of the first support 111 is provided with a first connecting portion, and the top end of the second support 112 is provided with a second connecting portion. The first connecting portion has a first pivot hole, and the second connecting portion has a second pivot hole. The first pivot is rotatably connected within the first pivot hole and the second pivot hole, thereby realizing the rotatable connection between the first support 111 and the second support 112. The central axis of the first pivot is the aforementioned first axis, and the rotation point is A. Of course, in some parallel embodiments, the first support 111 and the second support 112 can also be rotatably connected in an "X" shape or in a "T" shape, and are not limited to the aforementioned rotatable connection at the top end.

[0055] In one specific embodiment, a first caster 114 is rotatably connected to the bottom end of the first bracket 111, and a second caster 115 is rotatably connected to the bottom end of the second bracket 112. Optionally, both the first caster 114 and the second caster 115 are swivel wheels.

[0056] In one specific embodiment, two sets of first supports 111 and second supports 112 are provided at intervals, that is, two first supports 111 are spaced apart in a first direction, and two second supports 112 are spaced apart in a first direction, where the first direction is... Figure 4 As shown in the left-right direction, the first bracket 111 and the second bracket 112, located on the same side, are rotatably connected in the second direction, which is the left-right direction. Figure 4 The front-to-back direction is shown in the diagram. This improves the structural stability of the support assembly 110. Of course, in other embodiments, the first support 111 and the second support 112 can be provided in more numbers as needed to further improve the stability of the support assembly 110.

[0057] Continue to refer to Figure 4 As shown, the bracket assembly 110 also includes a base 113, which is connected between the two sets of first brackets 111 and second brackets 112. Specifically, the end of the base 113 in the first direction is fixedly connected to the inner bracket of the first bracket 111 and the second bracket 112 on the same side, and the fixed connection is adjacent to the rotatable connection of the first bracket 111 and the second bracket 112.

[0058] Continue to refer to Figure 4 As shown, the support assembly 110 also includes a bottom support rod 116, which is connected between two opposing first supports 111 to further improve the structural stability of the support assembly 110. Alternatively, another bottom support rod 116 can be connected between two opposing second supports 112 to further improve the structural stability of the support assembly 110.

[0059] In one specific embodiment, the first bracket 111 is the rear bracket of the frame 10, and the second bracket 112 is the front bracket of the frame 10. By applying force to the first bracket 111 from back to front, the first bracket 111 moves closer to the second bracket 112 and eventually closes into a folded state. Of course, in other specific embodiments, the second bracket 112 can also be moved closer to the first bracket 111 by applying force from front to back, and eventually closes into a folded state; or, force can be applied to both the first bracket 111 and the second bracket 112 simultaneously, causing them to move closer together into a folded state. Alternatively, the first bracket 111 can also be the front bracket of the frame 10, and the second bracket 112 can be the rear bracket of the frame 10.

[0060] In this embodiment, as Figure 8 and Figure 10 As shown, the first connector 121 includes a snap-fit ​​protrusion 1211 disposed on the first bracket 111, and the second connector 122 includes a rotatable hook 1221 rotatable about a second axis. The rotatable hook 1221 is provided with a snap-fit ​​groove 12211, and the snap-fit ​​protrusion 1211 engages with the snap-fit ​​groove 12211 to lock the bracket assembly 110 in a folded state. It should be noted that the rotatable hook 1221 can be rotatably connected to the second bracket 112 or to the base 113, with the rotation point being B.

[0061] During the process of bringing the first bracket 111 and the second bracket 112 closer together, the snap-fit ​​protrusion 1211 and the rotating hook 1221 approach each other. The snap-fit ​​protrusion 1211 gradually pushes the rotating hook 1221 away and gradually approaches the snap-fit ​​groove 12211 until the snap-fit ​​protrusion 1211 moves to the snap-fit ​​groove 12211 and finally snaps into the snap-fit ​​groove 12211.

[0062] Optionally, the rotating hook 1221 is a bent rod structure. In one specific embodiment, one end of the rotating hook 1221 is provided with a third pivot hole 12212, and a second pivot passes through the third pivot hole 12212 to rotatably connect the rotating hook 1221 to the second bracket 112 or the base 113. The central axis of the second pivot is the second axis. In other specific embodiments, the third pivot hole 12212 can also be provided in the middle of the rotating hook 1221, and is not limited to the end of the rotating hook 1221.

[0063] Continue to refer to Figure 5 , Figure 8 and Figure 10As shown, in one specific embodiment, the rotating hook 1221 is provided with an unlocking trigger surface 12213, and the unlocking trigger surface 12213 is provided with an anti-slip structure 12214. Applying force to the unlocking trigger surface 12213 can drive the locking protrusion 1211 to disengage from the locking groove 12211. Optionally, the unlocking trigger surface 12213 is provided at one end of the rotating hook 1221 and is disposed opposite to the end provided with the third pivot hole 12212.

[0064] To improve the anti-slip effect, the anti-slip structure 12214 is an anti-slip protrusion protruding from the unlock trigger surface 12213. Multiple anti-slip protrusions can be provided as needed. In addition to anti-slip protrusions, the anti-slip structure 12214 can also be an anti-slip groove or an anti-slip patch, as long as it can achieve the anti-slip effect.

[0065] In one embodiment, in the extending direction of the rotating hook 1221, a snap-fit ​​groove 12211 is disposed between the unlock trigger surface 12213 and the third pivot hole 12212. This arrangement ensures that when the snap-fit ​​protrusion 1211 snaps into the snap-fit ​​groove 12211, the unlock trigger surface 12213 is exposed in a position easily accessible to the user. In another embodiment, the unlock trigger surface 12213 is inclined downwards in the front-to-back direction, making it easier for the user to trigger the unlock trigger surface 12213.

[0066] Optionally, multiple snap-fit ​​slots 12211 are provided, and the multiple snap-fit ​​slots 12211 are spaced apart in the extending direction of the rotating hook 1221. The snap-fit ​​protrusion 1211 can selectively snap into one of the snap-fit ​​slots 12211. By providing multiple snap-fit ​​slots 12211 and selecting different snap-fit ​​slots 12211 to snap into the snap-fit ​​protrusion 1211, the first bracket 111 and the second bracket 112 can be in folded states with different degrees of folding. In a specific embodiment, such as Figure 8 As shown, the rotating hook component 1221 is provided with two snap-fit ​​grooves 12211. Optionally, the snap-fit ​​grooves 12211 are arc-shaped grooves.

[0067] Optionally, continue to refer to Figure 5 As shown, the second connecting member 122 further includes a third elastic member 1222 connected to the rotating hook member 1221. When the rotating hook member 1221 rotates around the second axis, the third elastic member 1222 accumulates elastic potential energy. Optionally, the third elastic member 1222 is a first torsion spring, which is sleeved on the second rotating shaft. One end of the first torsion spring is fixedly connected to the rotating hook member 1221, and the other end is fixedly connected to the second bracket 112 or the base 113. When the engaging protrusion 1211 drives the rotating hook member 1221 to rotate around the second axis, the first torsion spring can tighten and accumulate elastic potential energy.

[0068] Of course, in other embodiments, the third elastic element 1222 can also be other elastic elements, such as a tension spring or compression spring disposed between the rotating hook 1221 and other structures, as long as it can accumulate elastic potential energy when the snap-fit ​​protrusion 1211 drives the rotating hook 1221 to rotate around the second axis, and after the folding locking mechanism 120 releases the lock on the bracket assembly 110, the third elastic element 1222 can release the accumulated elastic potential energy to reset the rotating hook 1221.

[0069] In this embodiment, the assist mechanism 130 is disposed on at least one of the first support 111 and the second support 112. In one specific embodiment, the assist mechanism 130 may be disposed on the first support 111; in another specific embodiment, the assist mechanism 130 may be disposed on the second support 112; in yet another specific embodiment, the assist mechanism 130 is disposed on both the first support 111 and the second support 112. In the second position, the assist mechanism 130 is in a deformed state and accumulates a restoring force; after the first support 111 and the second support 112 are unlocked, the restoring force of the assist mechanism 130 drives the first support 111 and the second support 112 away from each other.

[0070] Continue to refer to Figure 6 As shown, in one embodiment, the assist mechanism 130 is located between the first support 111 and the second support 112. The assist mechanism 130 includes a lever 131 rotatable about a third axis and a second elastic element 132 connected to the lever 131. During the transition of the support assembly 110 from an unfolded state to a folded state, the first connector 121 abuts against the lever 131 and triggers the lever 131 to rotate about the third axis, and causes the second elastic element 132 to accumulate elastic potential energy. After the first connector 121 and the second connector 122 are unlocked, the lever 131 pushes the first support 111 to move away from the second support 112.

[0071] Specifically, the lever 131 is provided with a fourth pivot hole 1313. A third pivot passes through the fourth pivot hole 1313 to rotatably connect the lever 131 to the second bracket 112 or the base 113. The central axis of the third pivot is the third axis, and the rotation point is C. In other specific embodiments, the fourth pivot hole 1313 can also be provided in the middle of the lever 131, and is not limited to the end of the lever 131.

[0072] In one embodiment, the lever 131 includes a first lever 1311 and a second lever 1312 connected in an L-shape. The second lever 1312 is connected to one end of the first lever 1311, and a fourth pivot hole 1313 is provided at the end of the first lever 1311 away from the second lever 1312.

[0073] Optionally, the second elastic element 132 is a second torsion spring, which is sleeved on the third rotating shaft. One end of the second torsion spring is fixedly connected to the lever 131, and the other end is fixedly connected to the second bracket 112 or the base 113. When the first connecting member 121 drives the lever 131 to rotate around the third axis, the second torsion spring can tighten and accumulate elastic potential energy. Of course, in other embodiments, the second elastic element 132 can also be other elastic elements, such as a tension spring or compression spring disposed between the lever 131 and other structures, as long as it can accumulate elastic potential energy when the first connecting member 121 drives the lever 131 to rotate around the third axis, and can release the accumulated elastic potential energy after the folding locking mechanism 120 releases the lock on the bracket assembly 110.

[0074] In one specific embodiment, continue to refer to Figure 8 As shown, lever 131 in the first position is basically in a horizontal state. Continuing to refer to... Figure 10 As shown, the lever 131 in the second position is basically in a vertical state, that is, during the process of the bracket assembly 110 switching from the unfolded state to the folded state, the lever 131 rotates 90° around the third axis. Of course, in other embodiments, the included angle between the lever 131 in the first position and the lever 131 in the second position can also be other angles, and is not limited to 90°.

[0075] Optionally, the first connector 121 further includes an abutting protrusion 1212 connected to the snap-fit ​​protrusion 1211, the abutting protrusion 1212 abutting against the lever 131. Optionally, the snap-fit ​​protrusion 1211 is cylindrical, the abutting protrusion 1212 is elongated, and the side wall of the abutting protrusion 1212 facing the lever 131 can abut against the end of the lever 131.

[0076] In one specific embodiment, the first axis, the second axis, and the third axis are arranged in parallel. This arrangement improves the rationality of the layout of the bracket assembly 110, the folding locking mechanism 120, and the assist mechanism 130, and enhances the structural compactness of the entire frame 10.

[0077] In one specific embodiment, the first axis, the second axis, and the third axis do not belong to the same plane, that is, the rotation points A, B, and C are arranged in a triangle.

[0078] The folding and unfolding process of the frame 10 is as follows:

[0079] like Figures 7 to 10As shown, the folding and storage process is as follows: First, an external force is applied to the first support 111 toward the second support 112, causing the first support 111 to rotate inward through the rotation point A connected to the second support 112; then, the snap-fit ​​protrusion 1211 on the first support 111, which serves as the first connector 121, approaches and contacts the rotating hook 1221 of the second connector 122, and the continued rotation of the first support 111 causes the rotating hook 1221 to rotate downward through the rotation point B; subsequently, the abutting protrusion 1 of the first connector 121... When the side wall of the lever 131 of the 212-to-the-side contact with the lever 131, the abutment protrusion 1212 continues to move, which can drive the lever 131 to rotate downward through the rotation point C. During this process, the second torsion spring accumulates elastic potential energy. Finally, when the first bracket 111 rotates to a certain position, the locking groove 12211 on the rotating hook 1221 can lock the locking protrusion 1211 on the first bracket 111. The rotating hook 1221 returns to its original position through the elastic force of the first torsion spring, thereby locking the first bracket 111 and the second bracket 112 in a folded state.

[0080] like Figures 11 to 14 As shown, the unfolding process is as follows: When the first bracket 111 and the second bracket 112 are locked in the folded state, the assist mechanism 130 is in a charging state. If the user wants to unfold the frame 10, they can follow the steps below. Figure 12 Manually press down on the unlocking trigger surface 12213 of the rotating hook 1221 in the indicated direction, causing the rotating hook 1221 to rotate downwards around the second axis until the locking protrusion 1211 disengages from the locking groove 12211, thus unlocking the bracket assembly 110 by the folding locking mechanism 120; subsequently, as shown... Figure 14 As shown, the second torsion spring of the assist mechanism 130 releases elastic potential energy, causing the lever 131 to return to the first position. During this process, the lever 131 can push the first bracket 111 to return to its original position and unfold, so that the bracket assembly 110 switches to the unfolded state.

[0081] Example 2:

[0082] This embodiment provides a frame 10 that can be used in strollers, such as children's strollers or cargo carts. Of course, in addition to being used in strollers, the frame 10 can also be used in other devices that require support or folding for storage, which will not be listed here.

[0083] like Figures 15 to 19As shown, the frame 10 includes a support assembly 110, a folding locking mechanism 120, and a power assist mechanism 130. The support assembly 110 is the main structure of the frame 10. The support assembly 110 includes a first support 111 and a second support 112 rotatably connected about a first axis. The support assembly 110 has an unfolded state where the first support 111 and the second support 112 are far apart, and a folded state where the first support 111 and the second support 112 are close together. The folding locking mechanism 120 includes a first connector 121 disposed on the first support 111 and a second connector 122 disposed on the second support 112. When the support assembly 110 is in the unfolded state, the first connector 121 and the second connector 122 are separated. When the support assembly 110 is in the folded state, the first connector 121 and the second connector 122 lock together to lock the support assembly 110 in the folded state, thereby preventing the first support 111 and the second support 112 from moving away from each other. The power assist mechanism 130 is linked to the folding locking mechanism 120. During the process of the bracket assembly 110 changing from the unfolded state to the folded state, the assist mechanism 130 can move from the first position to the second position; after the folding locking mechanism 120 releases the lock on the bracket assembly 110, the assist mechanism 130 has the tendency to reset to the first position and drive the bracket assembly 110 to reset to the unfolded state.

[0084] Compared to existing frames with poor folding stability that require significant external force to unfold, the frame 10 provided in this embodiment not only folds for storage but also locks the first support 111 and the second support 112, which are already close together, in a folded state using a folding locking mechanism 120, reducing the chance of the frame 10 accidentally opening after folding. Furthermore, the frame 10 incorporates an assist mechanism 130. During the transition of the support assembly 110 from an unfolded to a folded state, the positional change of the folding locking mechanism 120 triggers the assist mechanism 130. During this linkage, the assist mechanism 130 accumulates energy. Subsequently, once the folding locking mechanism 120 releases the lock on the support assembly 110, the assist mechanism 130 can quickly and flexibly unfold the first support 111 and the second support 112 of the support assembly 110, reducing the effort required for the user to unfold the frame 10 and improving the user experience.

[0085] In one specific embodiment, both the first support 111 and the second support 112 are rod-shaped structures. The top end of the first support 111 is provided with a first connecting portion, and the top end of the second support 112 is provided with a second connecting portion. The first connecting portion has a first pivot hole, and the second connecting portion has a second pivot hole. The first pivot is rotatably connected within the first pivot hole and the second pivot hole, thereby realizing the rotatable connection between the first support 111 and the second support 112. The central axis of the first pivot is the aforementioned first axis, and the rotation point is A. Of course, in some parallel embodiments, the first support 111 and the second support 112 can also be rotatably connected in an "X" shape or in a "T" shape, and are not limited to the aforementioned rotatable connection at the top end.

[0086] In one specific embodiment, a first caster 114 is rotatably connected to the bottom end of the first bracket 111, and a second caster 115 is rotatably connected to the bottom end of the second bracket 112. Optionally, both the first caster 114 and the second caster 115 are swivel wheels.

[0087] In one specific embodiment, two sets of first brackets 111 and second brackets 112 are provided at intervals. Specifically, two first brackets 111 are spaced apart in a first direction, and two second brackets 112 are spaced apart in the same first direction (left-right direction of the frame 10). First brackets 111 and second brackets 112 on the same side are rotatably connected in a second direction (front-back direction of the frame 10). This improves the structural stability of the bracket assembly 110. Of course, in other embodiments, more first brackets 111 and second brackets 112 can be provided as needed to further improve the stability of the bracket assembly 110.

[0088] Continue to refer to Figure 15 and Figure 16 As shown, the bracket assembly 110 also includes a base 113, which is connected between the two sets of first brackets 111 and second brackets 112. Specifically, the end of the base 113 in the first direction is fixedly connected to the inner bracket of the first bracket 111 and the second bracket 112 on the same side, and the fixed connection is adjacent to the rotatable connection of the first bracket 111 and the second bracket 112.

[0089] The support assembly 110 also includes a bottom support rod, which connects between two opposing first supports 111 to further improve the structural stability of the support assembly 110. Alternatively, another bottom support rod can be connected between two opposing second supports 112 to further improve the structural stability of the support assembly 110.

[0090] In one specific embodiment, the first bracket 111 is the rear bracket of the frame 10, and the second bracket 112 is the front bracket of the frame 10. By applying force to the first bracket 111 from back to front, the first bracket 111 moves closer to the second bracket 112 and eventually closes into a folded state. Of course, in other specific embodiments, the second bracket 112 can also be moved closer to the first bracket 111 by applying force from front to back, and eventually closes into a folded state; or, force can be applied to both the first bracket 111 and the second bracket 112 simultaneously, causing them to move closer together into a folded state. Alternatively, the first bracket 111 can also be the front bracket of the frame 10, and the second bracket 112 can be the rear bracket of the frame 10.

[0091] In this embodiment, as Figures 15 to 19 As shown, the second connector 122 is an arc-shaped tubular structure. One end of the second connector 122 is fixedly connected to the first bracket 111, and the other end extends toward the second bracket 112. A insertion groove 12201 is formed in the second connector 122. The first connector 121 includes a plug 12101, which is an arc-shaped cylindrical structure. One end of the plug 12101 is connected to the second bracket 112, and the other end extends toward the first bracket 111 and can be inserted into the insertion groove 12201.

[0092] During the process of bringing the first bracket 111 and the second bracket 112 closer together, the snap-fit ​​protrusion 1211 and the rotating hook 1221 approach each other, and the plug 12101 can be gradually inserted into the plug groove 12201. Due to the frictional resistance between the plug 12101 and the plug groove 12201, the two can work together to lock the first bracket 111 and the second bracket 112 in a folded state.

[0093] To improve the locking strength of the folding locking mechanism 120 on the first bracket 111 and the second bracket 112, in a specific embodiment, the second connector 122 is provided with a locking hole 12202 communicating with the insertion groove 12201. The first connector 121 also includes a locking hook 12102. The insertion member 12101 is provided with an installation cavity 12103. The locking hook 12102 is rotatably connected in the installation cavity 12103. The locking hook 12102 includes a locking end 12104 and an unlocking end 12105 located outside the installation cavity 12103. The locking end 12104 can be locked into the locking hole 12202. Applying force to the unlocking end 12105 can drive the locking end 12104 to disengage from the locking hole 12202.

[0094] As the connector 12101 is gradually inserted into the connector slot 12201, the locking end 12104 of the locking hook 12102 gradually approaches the locking hole 12202. Once the locking end 12104 of the locking hook 12102 is engaged in the locking hole 12202, the first bracket 111 and the second bracket 112 can be stably locked in the folded state. If the user needs to unfold the frame 10, the user can apply force to the unlocking end 12105 of the locking hook 12102, so that the locking hook 12102... Figure 17 The state shown is rotated clockwise to Figure 18 The state shown allows the locking end 12104 of the locking hook 12102 to disengage from the locking hole 12202, allowing the plug 12101 to move outward from the plug groove 12201 until it disengages from the plug groove 12201. At this point, the folding locking mechanism 120 releases the lock on the bracket assembly 110.

[0095] Optionally, the first connector 121 further includes a fourth elastic element (not shown in the figure), under the action of the fourth elastic element, the locking hook 12102 can maintain the following position. Figure 19 The pose shown can be... Figure 17 The pose shown can also be a pose where the latch end 12104 is lower and the unlock end 12105 is higher.

[0096] The assist mechanism 130 is disposed on the first connector 121 and / or the second connector 122. In one embodiment, the assist mechanism 130 is disposed on the first connector 121; in another embodiment, the assist mechanism 130 is disposed on the second connector 122; in yet another embodiment, the assist mechanism 130 is disposed on both the first connector 121 and the second connector 122. In the second position, the assist mechanism 130 is in a deformed state and accumulates a restoring force; after the first bracket 111 and the second bracket 112 are unlocked, the restoring force of the assist mechanism 130 drives the first connector 121 and the second connector 122 away from each other.

[0097] In one specific embodiment, when the first connector 121 and the second connector 122 are locked together, the assist mechanism 130 is located between the first connector 121 and the second connector 122. Optionally, the assist mechanism 130 is a compression spring. In another specific embodiment, when the first connector 121 and the second connector 122 are locked together, the assist mechanism 130 is located on the outside of the first connector 121 away from the second connector 122, or on the outside of the second connector 122 away from the first connector 121. Optionally, the assist mechanism 130 is a tension spring.

[0098] Continue to refer to Figures 17 to 19As shown, in this embodiment, the assist mechanism 130 includes a first elastic element 1302, which is disposed at the bottom of the insertion slot 12201. The insertion member 12101 is inserted into the insertion slot 12201 by compressing the first elastic element 1302. Further, the assist mechanism 130 also includes a top block 1301, which is connected to the insertion slot 12201 via the first elastic element 1302. The insertion member 12101 can push the top block 1301 to move inwards towards the insertion slot 12201 and compress the first elastic element 1302.

[0099] As the connector 12101 is gradually inserted into the connector slot 12201, the connector 12101 can push the top block 1301 to move inward into the connector slot 12201. During this process, the first elastic element 1302 accumulates elastic potential energy until the locking end 12104 of the locking hook 12102 is engaged in the locking hole 12202, the top block 1301 stops moving, and the first elastic element 1302 stops compressing.

[0100] Of course, in other embodiments, the first elastic member 1302 may also be disposed at the end of the second connector 122 facing the first connector 121. When the first connector 121 and the second connector 122 are locked together, the assist mechanism 130 is located at the bottom of the insertion groove 12201 of the first connector 121.

[0101] When the support assembly 110 is in the folded state, the first elastic element 1302 is in a stored state. (The last part, "in accordance with...", appears to be a fragment and doesn't translate directly. It's unclear what it refers to.) Figure 18 During the process of applying force to the unlocking end 12105 of the locking hook 12102 in the indicated direction to unfold the frame 10, after the locking end 12104 of the locking hook 12102 disengages from the locking hole 12202, the first elastic member 1302 immediately releases its elastic potential energy. Under the action of the first elastic member 1302, not only can the top block 1301 push the plug 12101 to quickly disengage from the plug slot 12201, but it can also make the first bracket 111 quickly rotate away from the second bracket 112, so that the frame 10 quickly returns to the unfolded state.

[0102] Example 3:

[0103] like Figures 1 to 3 As shown, based on Embodiment 1 and Embodiment 2, this embodiment provides a stroller including a seat 20 and a frame 10, with the seat 20 mounted on the frame 10. Optionally, the seat 20 is mounted on the base 113 of the frame 10. The structure of the frame 10 has been described in Embodiment 1 and Embodiment 2, and will not be repeated here. The structure of the seat 20 is prior art and will not be described in detail here.

[0104] By adopting the frame 10 provided in Embodiment 1 and Embodiment 2, the trolley provided in this embodiment can be stably folded and stored, and flexibly unfolded for use, resulting in a high level of user experience.

[0105] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A vehicle frame, characterized in that, include: A support assembly includes a first support and a second support that are rotatably disposed relative to each other, and the support assembly has an unfolded state and a folded state. The folding locking mechanism includes a first connector disposed on the first bracket and a second connector disposed on the second bracket; in the folded state, the first connector and the second connector are locked together to restrict the first bracket and the second bracket from moving away from each other; During the transition from the unfolded state to the folded state, the assist mechanism moves from a first position to a second position. After the folding locking mechanism releases the bracket assembly from its lock, the assist mechanism tends to reset to the first position and drive the bracket assembly back to the unfolded state.

2. The frame according to claim 1, characterized in that, The assist mechanism is disposed on the first connector and / or the second connector. In the second position, the assist mechanism is in a deformed state and accumulates a reset rebound force. After the first bracket and the second bracket are unlocked, the reset rebound force of the assist mechanism drives the first connector and the second connector away from each other.

3. The frame according to claim 2, characterized in that, When the first connector and the second connector are locked together, the assist mechanism is located between the first connector and the second connector; The first connector and the second connector are plugged into each other, the second connector is provided with a plug-in groove, and the assist mechanism includes a first elastic element disposed at the bottom of the plug-in groove; or The assist mechanism includes a first elastic element, which is disposed at the end of the second connector facing the first connector; When the first connector and the second connector are locked together, the assist mechanism is located at the bottom of the insertion slot of the first connector.

4. The frame according to claim 2, characterized in that, The second connector is provided with a plug-in slot and a snap hole communicating with the plug-in slot; The first connector includes a plug and a locking hook. The plug has a mounting cavity, and the locking hook is rotatably connected to the mounting cavity. The locking hook includes a snap-fit ​​end and an unlocking end located outside the mounting cavity. The snap-fit ​​end can snap into the snap hole, and applying force to the unlocking end can drive the snap-fit ​​end to disengage from the snap hole.

5. The frame according to claim 3, characterized in that, The assist mechanism also includes a top block, which is connected to the insertion slot via the first elastic member. The first connector can push the top block to move inward toward the insertion slot and compress the first elastic member.

6. The frame according to claim 1, characterized in that, The assist mechanism is disposed on at least one of the first bracket and the second bracket; In the second position, the assist mechanism is in a deformed state and accumulates a reset rebound force; after the first bracket and the second bracket are unlocked, the reset rebound force of the assist mechanism drives the first bracket and the second bracket away from each other.

7. The frame according to claim 6, characterized in that, In the locked state, the assist mechanism is located between the first bracket and the second bracket; The assist mechanism includes a rotatable lever and a second elastic member connected to the lever. During the process of the bracket assembly changing from the unfolded state to the folded state, the first connecting member can abut against the lever and trigger the lever to rotate. After the first and second connectors are unlocked, the lever pushes the first bracket to move away from the second bracket.

8. The frame according to claim 6, characterized in that, The first connector includes a snap-fit ​​protrusion on the first bracket, and the second connector includes a rotatable rotating hook with a snap-fit ​​groove. The snap-fit ​​protrusion engages with the snap-fit ​​groove to lock the bracket assembly in the folded state.

9. The frame according to claim 8, characterized in that, The locking groove is provided in multiple ways, and the multiple locking grooves are spaced apart in the extension direction of the rotating hook. The locking protrusion can selectively engage with one of the locking grooves. And / or, the second connector further includes a third elastic element connected to the rotary hook, wherein the third elastic element accumulates elastic potential energy when the rotary hook rotates; And / or, the rotating hook is provided with an unlocking trigger surface, and the unlocking trigger surface is provided with an anti-slip structure. Applying force to the unlocking trigger surface can drive the locking protrusion to disengage from the locking groove.

10. A trolley, characterized in that, The vehicle includes a seat and a frame as described in any one of claims 1-9, wherein the seat is mounted on the frame.

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