Child carrier with changeable seat orientation

Abstract

The child carrier comprises a vehicle frame, the vehicle frame comprises two side frames, each side frame comprises a first supporting leg, a second supporting leg and a push handle rod, and an open area is formed between the first supporting legs; the seat comprises a seat plate and a backrest; the adaptive assembly comprises a detachable adaptive seat and an adaptive part, and the adaptive seat and the adaptive part are connected with the frame and the seat respectively; the seat can be mounted forwards or backwards through the adaptive assembly; the seat can rotate, and the open area is located on a rotation path of the seat; the rotary locking assembly is arranged between the seat and the frame; in the process of entering the folding state from the self-unfolding state, the seat plate and the backrest get close to each other, the rotary locking assembly is unlocked, the whole seat is turned over towards the open area, and at least one part of the seat enters the open area. The flexible arrangement of the seat is realized through the matching optimization of all the parts, the seat can adapt to the unfolding and folding of the frame in a forward or backward state, and the use experience is improved.

Description

Technical Field

[0001] This application relates to the field of child vehicles, and in particular to child vehicles with seats that can be oriented in a variable direction. Background Technology

[0002] Child vehicles are primarily used outdoors and during travel to transport goods or carry children. As people's lifestyles become more diverse, child vehicles also need to meet the needs of different scenarios, such as adjusting the vehicle's orientation. In existing technologies, orientation adjustment is generally achieved by adjusting the seat's orientation relative to the vehicle frame.

[0003] For example, Chinese patent document CN110949487A discloses a stroller with an adjustable and steerable seat. It includes an upper frame and a lower frame, with the upper frame mounted on the lower frame and rotatable relative to it. The upper frame includes an armrest and a seat frame connected to the armrest, and the armrest is radially rotatable relative to the seat frame. A limiting locking mechanism is provided between the upper and lower frames to restrict the rotation of the upper frame relative to the lower frame. A release mechanism is provided on either the upper or lower frame to unlock the limiting locking mechanism. After the limiting locking mechanism is unlocked, the seat frame can be rotated horizontally relative to the lower frame via the armrest, thus changing the seat's orientation. This allows the seat to be switched between forward and backward facing, achieving seat reversal.

[0004] However, during the folding process of child vehicles, the seat also needs to be folded for easy storage and transportation. Current technology often requires seats to be in a specific orientation to achieve good folding performance, which necessitates frequent seat removal or repositioning, impacting the user experience and reducing product lifespan. Utility Model Content

[0005] To address the aforementioned technical problems, this application discloses a child vehicle with a variable-orientation seat, having a relatively unfolded state and a folded state, including:

[0006] The frame includes two opposing side frames, each side frame including a first leg, a second leg and a push bar that are hinged to each other, and an open area between each first leg;

[0007] A seat, used to provide seating space and including a seat plate and backrest that are hinged together;

[0008] The adapter assembly includes a detachably connected adapter base and an adapter accessory, one of which is connected to the vehicle frame and the other is connected to the seat; the adapter assemblies are arranged in pairs, through which the seat can be mounted to the vehicle frame facing forward or backward; the seat mounted to the vehicle frame can rotate relative to the vehicle frame, and the open area is located on the rotation path of the seat;

[0009] A rotation locking assembly is disposed between the seat and the frame and is used to limit the relative positions of the two in the rotation path of the seat;

[0010] During the process of the child vehicle moving from the unfolded state to the folded state, the forward-facing or rearward-facing seats fold as follows:

[0011] The seat and the backrest come together, the rotary locking assembly is released, the entire seat folds toward the open area and at least a portion of the seat enters the open area.

[0012] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0013] In one embodiment, the adapter includes a disc with a circular outer edge, and the adapter seat includes an arcuate groove that mates with the disc. The adapter and the adapter seat are rotatably engaged by the disc and the arcuate groove, and the arcuate groove is partially open to allow the disc to enter or exit.

[0014] The adapter component also includes an installation locking component, which is used to prevent the disk from exiting the arc-shaped groove.

[0015] In one embodiment, the mounting locking component includes:

[0016] The mounting locking pin is movably mounted on the rotation axis on which the adapter and the adapter seat rotate and cooperate. The mounting locking pin has a locking position that passes through the adapter and the adapter seat and a releasing position that is released from one of them.

[0017] A mounting retainer is used to hold the mounting locking pin in the locked position;

[0018] The installation release element is mounted on the adapter or the adapter base and is movably positioned radially along the rotation axis.

[0019] In one embodiment, the rotary locking assembly includes a rotary locking groove and a rotary locking pin that cooperate with each other. One of them is fixed relative to the frame and is eccentrically disposed on a rotation axis that is rotatably engaged with the adapter and the adapter seat. The other rotates with the seat. During the rotation of the seat relative to the frame, the rotary locking pin has a locked state that cooperates with the rotary locking groove.

[0020] In one embodiment, guide ramps are provided on both sides of the rotary locking groove, and the guide ramps are used to drive the rotary locking pin back and engage with the rotary locking groove.

[0021] In one embodiment, the rotary locking pin is disposed on the seat and has a locking position protruding from the side of the seat and a corresponding unlocking position, wherein the rotary locking pin is driven into the unlocking position when the seat plate and the backrest are brought together.

[0022] In one embodiment, each side frame is connected to at least two of the first support leg, the second support leg, and the push handle via a first joint, wherein the mating axis of the first joint is higher than the plane of the first support leg; one of the adapter seat and the adapter accessory is disposed at the first joint, and the rotation axis of the seat and the frame is parallel to the mating axis of the first joint.

[0023] In one embodiment, a crossbar is provided between each of the second legs, the crossbar being located on the rotation path of the seat.

[0024] In one embodiment, during the process of the child carrier moving from the unfolded state to the folded state, the first leg and the second leg move closer together, and the push handle moves closer to one of the first leg and the second leg.

[0025] In one embodiment, the frame further includes a support frame located between the two side frames, the support frame being respectively provided with a pair of the adapter components with each side frame;

[0026] The support frame includes a first rod arranged parallel to the first leg and a second rod arranged parallel to the second leg. The first rod and the second rod are hinged to each other by a second joint, which is used to set the adapter component. The first rod divides the open area into a first area and a second area. In the folded state, the first area and the second area are used to accommodate different seats.

[0027] The technical solution disclosed in this application achieves flexible seat configuration through optimized coordination of various components, especially improvements to the adapter components. The seat can adapt to the unfolding and folding of the frame whether it is facing forward or backward, avoiding the cumbersome operation in the prior art and improving the user experience.

[0028] The specific beneficial technical effects will be further explained in the specific implementation methods in conjunction with the specific structures or steps. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a child vehicle structure with a variable seat orientation according to one embodiment of this application;

[0030] Figure 2 for Figure 1 A side view diagram of a child vehicle with a variable-orientation seat;

[0031] Figure 3 A schematic diagram illustrating the seat and frame assembly of a child vehicle with a variable-direction seating configuration;

[0032] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0033] Figure 5 for Figure 3 Enlarged view of section B in the middle;

[0034] Figure 6 for Figure 1 A top-down view of a child vehicle with adjustable seat orientation;

[0035] Figure 7 for Figure 6 Schematic diagram of the fit of the adapter components from the cross-sectional view at the CC section;

[0036] Figure 8 A schematic diagram illustrating the folding process of a child vehicle with a reversible seat orientation;

[0037] Figure 9 for Figure 8 A side view diagram of a child vehicle with a variable-orientation seat;

[0038] Figure 10 This is a diagram illustrating the folded state of a child vehicle with a reversible seat orientation.

[0039] Figure 11 for Figure 10 A side view diagram of a child vehicle with a seat that can be oriented in any direction.

[0040] The annotations in the figure are explained as follows:

[0041] 100. Side frame; 110. First support leg; 111. Open area; 120. Second support leg; 121. Crossbar; 130. Push bar; 140. Support frame; 141. Second joint; 150. First joint;

[0042] 200. Seat; 210. Seat board; 220. Backrest;

[0043] 300. Adapter component; 310. Adapter base; 311. Arc groove; 320. Adapter part; 321. Panel; 322. Mounting part; 330. Mounting locking component; 331. Mounting locking pin; 332. Mounting release component; 333. Mounting lock hole;

[0044] 400. Rotary locking assembly; 410. Rotary locking groove; 411. Guide slope; 420. Rotary locking pin. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] Reference Appendix Figure 1 To be continued Figure 11 As shown, this application discloses a child vehicle with a variable-orientation seat, including a frame and a seat 200 mounted on the frame via an adapter component 300. The child vehicle has a relatively unfolded state (e.g., with...). Figure 1 and attached Figure 2 (as shown) and folded status (e.g., attached) Figure 10 and attached Figure 11 As shown in the figure, the frame and seat 200 move accordingly during the state transition.

[0049] The frame includes two opposing side frames 100, each side frame 100 including a first support leg 110, a second support leg 120, and a push bar 130, with an open area 111 between each first support leg 110. Depending on the frame's orientation, the spatial positions of the first support legs 110 and second support legs 120 can vary accordingly. For example, in the attached... Figure 1 In this configuration, the first support leg 110 is the front support leg, and the second support leg 120 is the rear support leg. Correspondingly, in other embodiments, the first support leg 110 can also be configured as the rear support leg, and the second support leg 120 as the front support leg. Furthermore, the first support leg 110, the second support leg 120, and the push handle 130 can be coaxially hinged, or any two of them can be hinged together, with the third member not coaxially hinged to either of the first two. For example, see attached... Figure 2In the design, the push handle 130 and the first support leg 110 are hinged together by a first joint 150, and the second support leg 120 is hinged to either the push handle 130 or the first support leg 110 by an independent joint. The frame shown in the attached figures is a double-person stroller capable of mounting two seats 200; therefore, the frame also includes a support frame 140 located between the two side frames 100. However, the number of seats 200 does not inherently affect the implementation of the technical solution of this application; therefore, the technical solution for a single seat 200 will be described below, while the technical solutions for two or more seats 200 will be described separately.

[0050] Seat 200 includes a seat plate 210 and a backrest 220 articulated together. When the seat plate 210 and backrest 220 are separated, seat 200 provides seating space; when folded, the seat plate 210 and backrest move closer together to improve folding performance. Seat 200 can be mounted forward or rearward relative to the frame, for example, with... Figure 1 In this system, the seats 200 face different directions in different installation positions. Understandably, in the same installation position, the seats 200 can also be installed facing forward or backward.

[0051] The installation of seat 200 is achieved through adapter component 300, which includes a detachably connected adapter base 310 and adapter accessory 320. One of the adapter base 310 and adapter accessory 320 is connected to the vehicle frame, and the other is connected to seat 200. This allows for the detachable installation of seat 200 relative to the vehicle frame via adapter component 300 (see attached diagram). Figure 3 The adapter components 300 are arranged in pairs. In the embodiment shown in the figures, the adapter components 300 respectively mate with both sides of the seat 200 to provide a stable installation effect. The seat 200, mounted on the frame, is rotatable relative to the frame, and the open area 111 is located on the rotation path of the seat 200.

[0052] The rotational positioning of the seat 200 is achieved through a rotational locking assembly 400, which is disposed between the seat 200 and the frame and is used to limit the relative position of the two on the rotational path of the seat 200. The ultimate purpose of the rotational locking assembly 400 is to lock the relative position of the seat 200 and the frame. The component that actually locks the seat 200 acts directly on the seat 200 and the frame, or it can act indirectly on the seat 200 and the frame through a transmission component, for example, it can be disposed between the adapter assembly 300, between the adapter assembly 300 and the seat 200, or between the adapter assembly 300 and the frame.

[0053] During the process of the child vehicle transitioning from the unfolded state to the folded state, the seat plate 210 and backrest 220 of the seat 200 move closer together, the rotating locking component 400 releases, and the seat 200 folds towards the open area 111, with at least a portion of the seat 200 entering the open area 111. This process can be achieved with either a forward-facing or rearward-facing seat 200, eliminating the need to adjust the orientation of the seat 200 and improving the user experience. Furthermore, the movement of the seat plate 210 and backrest 220 and the release of the rotating locking component 400 can be configured independently or in conjunction.

[0054] For specific settings regarding the adaptation component 300, please refer to the appendix. Figure 3 To be continued Figure 6 In the illustrated embodiment, the adapter 320 is disposed on the vehicle frame and includes a disc 321 with a circular outer edge. The adapter seat 310 is disposed on the seat 200 and includes an arcuate groove 311 that mates with the disc 321. The adapter 320 and the adapter seat 310 are rotatably engaged by the disc 321 and the arcuate groove 311, with the arcuate groove 311 partially open to allow the disc 321 to enter or exit. In other embodiments, the adapter assembly 300 may also be configured in reverse, i.e., the adapter 320 is disposed on the seat 200, and the adapter seat 310 is disposed on the vehicle frame. The adapter assembly 300 further includes a mounting locking assembly 330, which is used to prevent the disc 321 from exiting the arcuate groove 311. Further, the mounting locking assembly 330 includes:

[0055] The mounting locking pin 331 is movably positioned on the rotation axis where the adapter 320 and the adapter base 310 rotatably engage. The mounting locking pin 331 has a locking position that penetrates both the adapter 320 and the adapter base 310 (e.g., attached). Figure 7 (as shown in the image) and the release position of one of them;

[0056] Mounting retainer (not shown) is used to hold mounting locking pin 331 in the locked position;

[0057] The installation release element 332 is mounted on the adapter 320 or the adapter base 310 and is movably mounted radially on the rotation axis.

[0058] In the diagram, the mounting locking pin 331 is movably mounted on the adapter 320. The adapter seat 310 has a mounting lock hole 333 for the mounting locking pin 331 to engage with. When the mounting locking pin 331 is located within the mounting lock hole 333, it is in the locked position. The adapter 320 and the adapter seat 310 can rotate relative to each other but cannot separate radially along the axis of rotation, thus maintaining their relative positions and holding the seat 200 on the frame. When the mounting release element 332 moves radially and drives the mounting locking pin 331 to overcome the holding force of the mounting retainer and enter the release position, the adapter 320 and the adapter seat 310 can separate radially along the axis of rotation, thereby removing the seat 200 from the frame.

[0059] Reference Appendix Figure 4 and attached Figure 5 In the illustrated embodiment, the rotary locking assembly 400 includes a cooperating rotary locking groove 410 and a rotary locking pin 420. One of them is fixed relative to the frame and rotatably engaged with the axis of rotation of the adapter 320 and the adapter seat 310, respectively. The other rotates with the seat 200. During the rotation of the seat 200 relative to the frame, the rotary locking pin 420 is in a locked state, engaging with the rotary locking groove 410. Further, one of the rotary locking groove 410 and the rotary locking pin 420 is disposed on the adapter 320, and the other is disposed on the adapter seat 310. When the rotary locking pin 420 is in the locked state, the positional relationship between the seat 200 and the frame is locked along the rotation path of the seat 200. In this embodiment, the rotary locking pin 420 is movably disposed on a plane perpendicular to the rotation of the seat 200 and enters or exits the locked state. The rotary locking pin 420 can be held in the locked state by an elastic element. To improve the locking experience of the rotary locking assembly 400, guide ramps 411 are provided on both sides of the rotary locking groove 410. The guide ramps 411 are used to drive the rotary locking pin 420 back and engage with the rotary locking groove 410. Unlocking the rotary locking assembly 400 can be achieved by a separate component retracting the rotary locking pin 420, or by linkage with other components. For example, the rotary locking pin 420 is located on the seat 200 and has a locking position extending from the side of the seat 200 and a corresponding unlocking position. When the seat plate 210 and the backrest 220 are brought together, the rotary locking pin 420 is driven into the unlocking position. Specific linkage settings can be found in the attached diagram. Figure 7 The implementation of existing technologies will not be elaborated upon here.

[0060] Regarding the mating relationships of the various components, each side frame 100 is connected to at least two of the first support leg 110, the second support leg 120, and the push handle 130 via the first joint 150. One of the adapter seat 310 and the adapter 320 is disposed at the first joint 150, and the rotation axis of the seat 200 and the frame is parallel to the mating axis of the first joint 150. In the figure, the first joint 150 enables the hinge connection of the first support leg 110 and the push handle 130. The adapter 320 is disposed at the first joint 150, and the adapter 320 achieves clearance mounting between the disc body 321 and the first joint 150 via the protruding mounting portion 322. The arc-shaped groove 311 of the adapter seat 310 mates with the disc body 321 via the gap between the disc body 321 and the first joint 150.

[0061] During the process of the child vehicle moving from the unfolded state to the folded state, the first leg 110 and the second leg 120 move closer together, and the push handle 130 moves closer to one of the first leg 110 and the second leg 120. The mating axis of the first joint 150 is higher than the plane of the first leg 110, allowing the seat 200 to rest against the first leg 110 in the folded state, thus providing a neat folding action.

[0062] Furthermore, a crossbar 121 is provided between each of the second support legs 120, and the crossbar 121 is located on the rotation path of the seat 200. The crossbar 121 can enhance the mechanical performance of the frame, avoid the problem of reduced frame rigidity caused by the setting of the open area 111, and also prevent the seat 200 from moving to an unsuitable position, providing a folding experience with foolproof protection.

[0063] The child vehicle seat 200 of this application can be flexibly configured, providing a smooth operating experience regardless of the orientation of the seat 200 during folding and unfolding. This feature is particularly suitable for child vehicles with multiple seats 200. In the accompanying drawings, multiple seats 200 are arranged side-by-side. To facilitate the installation of the seats 200, the frame also includes a support frame 140 located between the two side frames 100. Each support frame 140 is equipped with a pair of adapter components 300 with each side frame 100. Multiple pairs of adapter components 300 provide multiple mounting positions, enabling the installation of multiple seats 200. The orientation of each seat 200 can be independently and flexibly configured. The support frame 140 includes a first rod parallel to the first support leg 110 and a second rod parallel to the second support leg 120. The first and second rods are hinged together by a second joint 141, which is used to mount the adapter components 300. The first rod divides the open area 111 into a first section and a second section. In the folded state, the first and second sections are used to accommodate different seats 200. The second member divides the crossbar 121 into a first part and a second part, and connects them to the corresponding side frames 100. The first part and the second part are located on the rotation paths of different seats 200.

[0064] The following is in conjunction with the appendix Figure 1 and attached Figure 2 Appendix Figure 8 To be continued Figure 11 The diagram illustrates the process by which the child vehicle in this application transitions from the unfolded state to the folded state:

[0065] Before operation begins, the seat 200 can be freely set to operate without needing to be adjusted to a uniform or specific orientation. For example, the seat 200 in the picture is in different orientations.

[0066] First, the backrest 220 and seat plate 210 of the seat 200 are brought together. During this process, the rotation locking component 400 can be released in conjunction with the seat 200, reducing the number of operating parts. After the rotation locking component 400 is released, the seat 200 can rotate relative to the frame. Regardless of the orientation of the seat 200, it can be flipped toward the first foot 110 and at least partially enter the open area 111.

[0067] The frame is folded by unlocking the frame locking structure. During the folding process, the first support leg 110 and the second support leg 120 move closer to each other, and the push handle 130 moves closer to the first support leg 110. The push handle 130 is U-shaped and located on the outside of the seat 200 to further improve the overall folding performance.

[0068] The unfolding process can be reversed. Other settings details not covered here can be implemented with reference to the attached diagram and existing technology, and will not be elaborated here.

[0069] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0070] The embodiments described above are merely examples 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 modifications and improvements all fall within the protection scope of this application.

Claims

1. A child carrier having a seat which is variable in orientation, having opposed unfolded and folded states, characterised in that, The child carrier comprises: a frame comprising opposite side frames, each side frame comprising a first leg, a second leg and a handlebar, and an open area between each first leg; a seat for providing a seating space and comprising a seat board and a backrest hingedly connected to each other; an adapter assembly comprising an adapter seat and an adapter piece detachably connected to each other, one of the adapter seat and the adapter piece being connected to the frame and the other being connected to the seat, the adapter assembly being arranged in pairs, by which the seat can be installed on the frame forwardly or rearwardly; the seat installed on the frame can rotate relative to the frame, and the open area is located on the rotation path of the seat; a rotation locking assembly arranged between the seat and the frame and used for limiting the relative position of the seat and the frame on the rotation path of the seat; in the process of the child carrier entering the folded state from the unfolded state, the seat installed forwardly or rearwardly is folded as follows: the seat board and the backrest are moved towards each other, the rotation locking assembly is unlocked, the seat as a whole is folded towards the open area, and at least a part of the seat enters the open area.

2. A seat-reclining child carrier according to claim 1, characterized in that, the adapter piece comprises a disc body with a circular outer edge, the adapter seat comprises an arc-shaped slot matched with the disc body, the adapter piece and the adapter seat are rotationally matched by the disc body and the arc-shaped slot, and the arc-shaped slot is partially open to allow the disc body to enter or exit; the adapter assembly further comprises an installation locking assembly used for limiting the disc body from exiting the arc-shaped slot.

3. A seat-reclining child carrier according to claim 2, characterized in that, the installation locking assembly comprises: an installation locking pin movably arranged on the rotation axis of the rotationally matched adapter piece and adapter seat, the installation locking pin having a locking position penetrating the adapter piece and the adapter seat and an unlocking position exiting one of the adapter piece and the adapter seat; an installation retaining member used for retaining the installation locking pin in the locking position; an installation unlocking member arranged on the adapter piece or the adapter seat and movably arranged in the radial direction of the rotation axis.

4. The seat-reclining child carrier of claim 1, wherein, the rotation locking assembly comprises a rotation locking slot and a rotation locking pin matched with each other, one of which is fixed relative to the frame and eccentrically arranged relative to the rotation axis of the rotationally matched adapter piece and adapter seat, and the other rotates with the seat, and the rotation locking pin has a locking state matched with the rotation locking slot in the process of the seat rotating relative to the frame.

5. A seat-reclining child carrier according to claim 4, characterized in that, both sides of the rotation locking slot are provided with guide inclined surfaces used for driving the rotation locking pin to retreat and be matched with the rotation locking slot.

6. The seat-reclining child carrier of claim 4, wherein, the rotation locking pin is arranged on the seat and has a locking position protruding from the side of the seat and an opposite unlocking position, and the seat board and the backrest are driven to enter the unlocking position when moved towards each other.

7. The seat-reclining child carrier of claim 1, wherein, each side frame realizes the connection of at least two of the first leg, the second leg and the handlebar by a first joint, the matching axis of the first joint is higher than the plane where the first leg is located, one of the adapter seat and the adapter piece is arranged on the first joint, and the rotation axis of the seat and the frame and the matching axis of the first joint are arranged in parallel.

8. The seat-reclining child carrier of claim 1, wherein, Crossbars are provided between the second legs and are located on the rotating path of the seats.

9. The seat-reclining child carrier of claim 1, wherein, During the process of the child carrier entering the folded state from the unfolded state, the first legs and the second legs are moved towards each other, and the push handle is moved towards one of the first legs and the second legs.

10. The seat-reclining child carrier of claim 1, wherein, The frame further comprises support frames between the side frames, and each support frame is provided with a pair of the adapter assemblies. The support frame comprises a first rod parallel to the first legs and a second rod parallel to the second legs, the first rod and the second rod are hingedly connected by a second joint, the second joint is used to provide the adapter assemblies, and the first rod divides the open area into a first area and a second area, and in the folded state, the first area and the second area are used to accommodate different seats respectively.

Images