Foldable bench for a treadmill

Abstract

The utility model discloses a kind of foldable wear platform seats, it is related to the technical field of seat, including seat plate, the front and rear ends of seat plate are each configured with rotatable crossbeam, each crossbeam is configured with through hole, each through hole is configured with support leg, and the support leg of the front and rear ends can be folded to below seat plate by rotating crossbeam, the utility model is equipped with support leg foldable structure, and each support leg can be adjusted in height by passing through seat plate mesa, compatible quick folding and the function of increasing adjustment height, it is convenient to carry while adapting to various rugged outdoor ground, effectively solve the technical contradiction that existing product portability and topography adaptability cannot be compatible.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a foldable bench seat. Background Technology

[0002] Seating is an essential piece of equipment for outdoor recreation and fishing activities. While there are many existing products that include seating, these products all have certain shortcomings in terms of portability and terrain adaptability. Specifically:

[0003] Firstly, patent document CN218831688U discloses a fishing chair that is easy to fold and store. This fishing chair uses support legs with built-in telescopic structures, and the front and rear support legs can be folded under the seat. It has the advantages of compact structure and easy portability, and the height can be adjusted through the telescopic structure of the support legs. However, since each support leg cannot be adjusted individually through the seat platform, the height adjustment is limited with a fixed support leg length, and it cannot effectively adapt to various uneven outdoor terrains. In addition, similar fishing chairs can only increase their terrain adaptability by increasing the length of the support legs, but increasing the length also means that the folded storage length of the seat will increase, affecting portability.

[0004] Secondly, patent document CN209185470U discloses a riding-style fishing platform with a foldable backrest. It employs a structure with four support legs arranged in a four-corner limiting hole configuration. By adjusting the position of each support leg within its corresponding limiting hole, the height of each leg can be individually adjusted, ensuring the seat remains level even on uneven ground. However, the support legs themselves do not have a folding function. During use, the entire support leg must be completely removed from or inserted into the limiting hole, making the storage and unfolding process cumbersome, inefficient, and lacking in portability.

[0005] In summary, existing seating technologies cannot simultaneously achieve both portability and folding while increasing height adjustment. Therefore, it is necessary to propose a new technology to solve the aforementioned technical problems. Utility Model Content

[0006] To address the shortcomings and defects of the existing technology, this utility model proposes a foldable bench seat. The seat adopts a structure in which the support legs can be folded and each support leg can pass through the seat platform for height adjustment. It can be compatible with the functions of quick folding and increased height adjustment, making it easy to carry while adapting to various uneven outdoor surfaces. It effectively solves the technical contradiction of the existing products being unable to achieve both portability and terrain adaptability.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A foldable bench seat includes a seat board with rotatable crossbeams at both the front and rear ends. Each crossbeam has a through hole, and each through hole contains a support leg that extends out to the top of the seat board. The support legs at the front and rear ends can be folded under the seat board by rotating the crossbeams.

[0009] The seat has symmetrical side beams fixed on its left and right sides, and the crossbeams are rotatably connected between the front and rear ends of the two side beams.

[0010] The side beam has a limiting rotating component and a locking assembly at both ends. One end of the limiting rotating component is hinged to the side of the side beam via a limiting pin, and the other end has a locking groove. The bottom surface of the limiting rotating component has a limiting part that extends horizontally to the bottom of the side beam, and the side of the limiting rotating component has a connecting part. The cross beam is fixed to the limiting rotating components on the side beam via the connecting part. The locking assembly is fixed to the end face of the side beam and has a locked state and an unlocked state. In the locked state, the locking assembly is embedded in the locking groove, and the cross beam cannot rotate. In the unlocked state, the locking assembly is disengaged from the locking groove, and the cross beam can rotate.

[0011] The locking assembly includes a handle, a plug, a connecting block, a return spring, and a locking shaft for engaging with the locking groove. The end of the side beam has a symmetrical U-shaped groove. The plug is inserted and fixed to the end face of the side beam. The upper end of the handle is hinged to the upper part of the plug. The middle of the handle is fixed to the connecting shaft, and the lower end of the handle is a control unit. Force applied to the control unit controls the switching of the locking assembly's state. The locking shaft is slidably disposed within the U-shaped groove. One end of the return spring is fixed to a limit pin, and the other end is fixed to the middle of the locking shaft. The connecting block is movably connected between the connecting shaft and the locking shaft. In the locked state, the locking shaft is embedded in the locking groove to lock the crossbeam. In the unlocked state, the locking shaft disengages from the locking groove to release the crossbeam from locking.

[0012] An arc-shaped guide is provided above the locking groove of the limiting rotating member. When switching from the unlocked state to the locked state, the arc-shaped guide is used to make the locking shaft automatically embed into the locking groove.

[0013] The connecting part is provided with a groove that matches the support leg, and the side of the support leg fits into the groove.

[0014] The outer surface of the support leg is provided with a positioning rack along the axial direction. A height adjustment component for cooperating with the positioning rack is fixed on the crossbeam. The height adjustment component has a natural state and an adjusted state. In the natural state, the height adjustment component is engaged with the positioning rack, and the support leg cannot move in the through hole. In the adjusted state, the height adjustment component disengages from the positioning rack, and the position of the support leg in the through hole is adjustable.

[0015] The height adjustment assembly includes a positioning housing, a control component, an elastic component, and an arc-shaped rack. The positioning housing is fixed inside a crossbeam. The lower surface of the crossbeam has a clearance hole adapted to the control component. One end of the control component is the force-bearing part, and the other end is fixed with a wheel. The wheel is hinged inside the positioning housing, and an arc-shaped rack adapted to the positioning rack is fixed on the wheel. The elastic component is vertically abutted against the middle of the control component through the positioning housing. In the natural state, the arc-shaped rack meshes with the positioning rack, and the support leg cannot move within the through hole. In the adjusted state, the arc-shaped rack disengages from the positioning rack, and the position of the support leg within the through hole is adjustable.

[0016] The rear end of the seat is hinged to a foldable backrest via a side beam.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model employs a cooperative structure where each support leg can independently extend through the seat platform, and rotating the support legs allows them to be folded under the seat. Compared to existing technologies where the support legs have built-in telescopic structures but cannot extend above the seat, the support legs in this seat, in addition to being height-adjustable via their built-in telescopic structures, can also be independently adjusted in height by adjusting their positions within the through holes. This effectively increases the height adjustment range of the seat. Even on uneven outdoor surfaces with potholes and slopes, the seat platform can be quickly leveled. This structure achieves a greater height adjustment function with the shortest possible support legs, as the length of the support legs directly affects the folding length, resulting in a sufficiently short folded and stored product while simultaneously achieving greater height adjustment.

[0019] In addition, by rotating the rear crossbeam, the support legs at the front and rear of the seat can be integrated into a foldable structure, rather than the cumbersome detachable structure of existing fishing chairs. This makes unfolding and folding faster and more convenient, and the fishing chair is more integrated and stable.

[0020] In summary, this utility model successfully combines the two major functions of rotating and folding the support legs and adjusting the platform into one, fundamentally solving the contradiction between portability and terrain adaptability in the prior art, and providing users with an ideal outdoor seating that is comprehensive in function, easy to operate, and highly adaptable.

[0021] 2. This utility model can achieve height adjustment by controlling the support leg to slide up and down in the through hole and lock it, and can achieve the folding of the support leg under the seat platform by controlling the crossbeam to rotate downward. The integrated operation of adjustment and folding does not require disassembling any parts. Compared with the cumbersome process of existing fishing chairs that require drilling for adjustment and disassembling the legs for storage, the operation steps can be reduced by half. It is especially suitable for the needs of quick adjustment and temporary storage and transfer in outdoor scenarios.

[0022] 3. After the support legs are folded under the seat platform, the seat has a thin sheet structure and is compact in size. It can be easily put into a fishing tackle bag or camping backpack, or carried separately by the handle on the side of the seat platform, which greatly improves the flexibility of carrying.

[0023] 4. This utility model is designed for fishing scenarios. The function of independently adjusting the height of each support leg makes the seat adaptable to complex terrains such as riverbank slopes and gravel ground. Its foldable portability can meet the needs of moving between multiple fishing spots. At the same time, its stable support and portability can also be extended to camping, picnics, outdoor sketching and other scenarios. Compared with the limitation of dedicated fishing chairs in a single scenario, it has a wider range of applications. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is an exploded structural diagram of the present invention;

[0026] Figure 3 This is a side view of the structural structure of this utility model;

[0027] Figure 4 This is a three-dimensional structural diagram (I) of the limiting rotation component in this utility model;

[0028] Figure 5 This is a three-dimensional structural diagram (II) of the limiting rotating component in this utility model;

[0029] Figure 6 This is a three-dimensional structural diagram of the locking component in this utility model;

[0030] Figure 7 This is an exploded view of the locking assembly in this utility model;

[0031] Figure 8 This is an exploded view of the height adjustment component in this utility model.

[0032] The components in the diagram are labeled as follows: 1. Seat plate, 2. Crossbeam, 3. Through hole, 4. Support leg, 5. Side beam, 6. Limiting rotating component, 7. Locking assembly, 8. Limiting pin, 9. Locking groove, 10. Limiting part, 11. Connecting part, 12. Groove, 13. Handle, 14. Plug, 15. Connecting block, 16. Return spring, 17. Locking shaft, 18. U-shaped slide, 19. Arc-shaped guide part, 20. Positioning rack, 21. Height adjustment assembly, 22. Positioning housing, 23. Control component, 24. Elastic component, 25. Arc-shaped rack, 26. Backrest. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0034] Example 1

[0035] This embodiment provides a foldable seat with legs 4 that can be folded and pass through the seat 1. The folding function allows the legs 4 to be folded to the underside of the seat 1 to reduce volume. The passing-through function allows each leg 4 to pass independently through the seat 1 surface for height adjustment. In this embodiment, the legs 4 can be a conventional structure with built-in telescopic adjustment, but a structure with built-in telescopic adjustment is preferred. Combining this with the folding and passing-through functions of this embodiment integrates the advantages of portable folding and independent height adjustment for each leg 4, resulting in improved practicality.

[0036] See Figures 1-3 The seat includes a seat 1, which can be square or oval, etc. Taking a square seat as an example, a rotatable crossbeam 2 is provided at each of the front and rear ends of the seat 1 along the width direction. Each crossbeam 2 is provided with a through hole 3, and a support leg 4 that can move up and down is provided in each through hole 3. By controlling the up and down movement of each support leg 4 and adjusting the position of each support leg 4 in the limiting hole, the upper end of the support leg 4 can be made to extend above the seat 1, or the upper end of the support leg 4 can be made to be level with the upper surface (table) of the seat 1, or the upper end of the support leg 4 can be made to be below the upper surface (table) of the seat 1, thereby realizing the through-table function of the seat and keeping the seat 1 level even on uneven ground. In addition, the support legs 4 at the front and rear ends can be folded under the seat 1 by rotating the crossbeam 2. That is, the support leg 4 at the front end can be folded under the seat 1 by rotating the crossbeam 2 at the front end, and the support leg 4 at the rear end can be folded under the seat 1 by rotating the crossbeam 2 at the rear end, thereby realizing the folding function of the seat.

[0037] See Figures 1-3 Each crossbeam 2 has two through holes 3, and a support leg 4 is arranged in each through hole 3, which allows the seat to form a stable support structure with four support legs 4. Preferably, the spacing between the through holes 3 on the front crossbeam 2 is greater than or less than the spacing between the through holes 3 on the rear crossbeam 2, which allows the four support legs 4 to fold side by side on the lower surface of the seat plate 1, avoiding the front and rear support legs 4 from interfering with each other and not being able to fold effectively. Of course, without considering the volume after folding, the spacing between the through holes 3 on the front and rear crossbeams 2 can also be equal.

[0038] See Figures 1-3The seat 1 has vertical bent edges on the left and right sides. Symmetrical side beams 5 are fixed to the left and right sides of the seat 1 by the bent edges and screws. Two crossbeams 2 are rotatably connected between the front end and the rear end of the two side beams 5, which has the advantage of improving the overall structural strength of the seat.

[0039] Optionally, the crossbeam 2 can also be directly hinged to the front and rear ends of the seat plate 1 to achieve its rotatable function.

[0040] It should be noted that both the crossbeam 2 and the side beams 5 are preferably made of rectangular alloy tubing. When the seat is in the unfolded state, the heights of the crossbeam 2, side beams 5, and seat 1 are preferably approximately the same, and the distance between the crossbeam 2 and the seat 1 is small, preferably so as not to affect the rotation of the crossbeam 2. Those skilled in the art will understand that when the seat is in the unfolded state, the seat is equipped with a locking structure to lock the crossbeam 2 and a limiting structure to limit the support legs 4, so that the seat has a stable and reliable unfolding structure. Both the locking structure and the limiting structure can be implemented using existing conventional structures, for example, the limiting structures cited in the background art.

[0041] When using this embodiment outdoors, after taking the seat out of the backpack, first control the support leg 4 to rotate, so that the seat changes from the folded state to the unfolded state. Place the unfolded seat on the ground. If the ground is uneven, the position of the corresponding support leg 4 in the through hole 3 can be adjusted as needed to adjust the height of the seat 1 platform until the seat 1 platform is level. If the seat 1 platform still cannot be level after each support leg 4 is adjusted to its limit position, its height can also be adjusted through the telescopic structure of each support leg 4 until the seat 1 platform is level.

[0042] The following uses a foldable and easy-to-store fishing chair cited in the background art as a comparative example for practical comparison with this embodiment.

[0043] Both this embodiment and the comparative example use a 50cm long support leg 4 with an internal telescopic structure. The maximum extended length of the support leg 4 is 90cm. The longest support leg 4 in the comparative example is 90cm and the shortest is 50cm. Therefore, the maximum height difference is 90-50=40cm. This maximum height difference is essentially equal to the maximum adaptability of the fishing chair to the terrain.

[0044] In this embodiment, the same length of support leg 4 is used. Since the support leg 4 can be adjusted upwards and pass through the seat plate 1, the shortest length of the support leg 4 is 10cm (after deducting the length of the support leg 4 that cannot pass through the through hole 3). It can be seen that the maximum height difference is 90-10=80cm, which is much higher than the 40cm of the comparative example. It can be clearly concluded that when using support legs of the same length, the terrain adaptability of this embodiment is much better than that of the comparative example.

[0045] Example 2

[0046] This embodiment further optimizes the structure of the seating based on Embodiment 1.

[0047] See Figures 1-5 Each side beam 5 has a limiting rotating member 6 and a locking assembly 7 at both ends for controlling the crossbeam 2. The limiting rotating member 6 is roughly square in shape, with an ear plate integrally formed at one end. The ear plate is hinged to the side of the side beam 5 by a limiting pin 8. The other end has a locking groove 9 in the middle that cooperates with the locking assembly 7. The limiting rotating member 6 can rotate around the limiting pin 8. The bottom surface of the limiting rotating member 6 has a limiting part 10 extending horizontally to the bottom of the side beam 5. In the horizontal state, the limiting rotating member 6 can only rotate downwards under force and cannot rotate upwards. The side of the limiting rotating member 6 has a protruding connecting part 11. The limiting rotating members 6 on the left and right side beams 5 are arranged opposite each other. The two ends of the crossbeam 2 are fixed between the limiting rotating members 6 on the side beams 5 by the connecting parts 11 on the left and right side beams 5, so that the crossbeam 2 has a rotatable function. The locking assembly 7 is fixed to the end face of the side beam 5 and has a controlled locking state and an unlocking state that can be switched. In the locking state, the locking assembly 7 is embedded in the locking groove 9, and the crossbeam 2 cannot rotate. Correspondingly, the support leg 4 cannot rotate. In the unlocking state, the locking assembly 7 is disengaged from the locking groove 9, and the crossbeam 2 can rotate. Correspondingly, the support leg 4 can rotate.

[0048] It should be noted that the crossbeam 2 and the connecting part 11 are fixed together by screws. The two can be fixed by the connecting part 11 extending into the crossbeam 2, or by the end of the crossbeam 2 extending into the connecting part 11.

[0049] See Figures 1-3 , Figures 6-7The locking assembly 7 includes a handle 13, a plug 14, a connecting block 15, a return spring 16, and a locking shaft 17 for engaging with the locking groove 9. The end of the side beam 5 has a symmetrical U-shaped groove 18, and the height of the U-shaped groove 18 is the same as that of the locking groove 9. The plug 14 is inserted and fixed to the end face of the side beam 5. The plug 14 is hollow and has a U-shaped structure. The upper end of the handle 13 is hinged to the upper part of the plug 14. The middle part of the handle 13 has a connecting shaft integrally formed, and the lower end of the handle 13 is a control part. Force applied to the control part can control the switching of the locking assembly 7's state. The locking shaft 17 is slidably disposed within the U-shaped groove 18 and can slide into the locking groove 9. One end of the return spring 16 is fixed to the limiting pin 8, and the other end is fixed to the middle of the locking shaft 17. Connecting blocks 15 are movably connected between the connecting shaft and the locking shaft 17. Specifically, there are two connecting blocks 15, each with two connecting holes. The two connecting holes on each connecting block 15 are movably fitted onto the connecting shaft and the locking shaft 17, respectively. The two connecting blocks 15 are located on both sides of the return spring 16. In the locked state, the locking shaft 17 is inserted into the locking groove 9 under the action of the return spring 16, locking the crossbeam 2. At this time, neither the crossbeam 2 nor the support leg 4 can rotate. By pulling the control unit outward, the control unit is forced to slide the locking shaft 17 out of the locking groove 9, switching to the unlocked state. At this time, the locking shaft 17 disengages from the locking groove 9, releasing the locking of the crossbeam 2, and both the crossbeam 2 and the support leg 4 can rotate simultaneously.

[0050] See Figures 4-5 An arc-shaped guide 19 is provided above the locking groove 9 of the limiting rotating member 6. When switching from the unlocked state to the locked state, the arc-shaped guide 19 is used to automatically engage the locking shaft 17 into the locking groove 9. When the seat is unfolded, the unfolding support leg 4 can be automatically locked without applying external force to the control unit.

[0051] See Figures 4-5 The support leg 4 is typically circular, and the connecting part 11 is provided with a groove 12 that matches the support leg 4, with the side of the support leg 4 fitting into the groove 12. Specifically, when the distance between the through holes 3 on the front crossbeam 2 is greater than the distance between the through holes 3 on the rear crossbeam 2, it is preferable that the through holes 3 on the front crossbeam 2 are closer to the connecting part 11, and in this case, the side of the support leg 4 on the front crossbeam 2 fits into the groove 12. When the distance between the through holes 3 on the front crossbeam 2 is less than the distance between the through holes 3 on the rear crossbeam 2, it is preferable that the through holes 3 on the rear crossbeam 2 are closer to the connecting part 11, and in this case, the side of the support leg 4 on the rear crossbeam 2 fits into the groove 12. The structure in which the groove 12 fits into the side of the support leg 4 helps to improve the structural strength of the support leg 4 within the through holes 3, as well as the structural strength of the connection between the support leg 4, the crossbeam 2, and the limiting rotating part 6.

[0052] This embodiment uses a limiting rotating component 6 and a locking assembly 7 with a specific structure, which enables the crossbeam 2 to rotate along a preset trajectory to achieve effective folding of the support leg 4. It has the advantages of simple structure, convenient operation, standardization, and stability and reliability.

[0053] Example 3

[0054] This embodiment further optimizes the structure of the seating based on Embodiment 1 or Embodiment 2.

[0055] See Figure 2 , Figure 7 Each support leg 4 has a positioning rack 20 on its outer surface along the axial direction. A height adjustment component 21 is fixed on the crossbeam 2 to cooperate with the positioning rack 20 to adjust and lock the position of the support leg 4. The height adjustment component 21 has a natural state and an adjusted state. In the natural state, the height adjustment component 21 is engaged with the positioning rack 20, and the support leg 4 cannot move in the through hole 3. At this time, the support leg 4 can form a stable and reliable support structure for the seat plate 1. In the adjusted state, the height adjustment component 21 is disengaged from the positioning rack 20, and the position of the support leg 4 in the through hole 3 is adjustable. At this time, by controlling the support leg 4 to move up and down, the height (levelness) of the seat plate 1 can be adjusted. After the adjustment is completed, switching to the natural state can lock the support leg 4.

[0056] See Figure 2 , Figure 7 Each height adjustment assembly 21 includes a positioning housing 22, a control component 23, an elastic component 24, and an arc-shaped rack 25. The positioning housing 22 is fixed inside the crossbeam 2 by screws. The positioning housing 22 is generally rectangular in shape. One end of the positioning housing 22 opposite to the positioning rack 20 is an open end. The lower surface of the positioning housing 22 has a preset opening for setting the control component 23. The lower surface of the crossbeam 2 has a clearance hole adapted to the control component 23. One end of the control component 23 is a force-bearing part, and the other end is fixed with a wheel. The wheel is hinged inside the positioning housing 22 by a locking shaft. The wheel is fixed with a component adapted to the positioning rack 20. The arc-shaped rack 25 and the elastic element 24 are vertically abutted against the middle of the control element 23 through the positioning housing 22. In the natural state, the arc-shaped rack 25 is engaged with the positioning rack 20 under the action of the elastic element 24, and the support leg 4 cannot move in the through hole 3. Pressing the force-receiving part of the control element 23 upwards causes the force-receiving part to drive the wheel to rotate, so that the arc-shaped rack 25 disengages from the positioning rack 20 and switches to the adjustment state. At this time, the position of the support leg 4 in the through hole 3 is adjustable. After the adjustment is completed, the force-receiving part is released, and the arc-shaped rack 25 automatically engages with the positioning rack 20 under the action of the elastic element 24 and locks the support leg 4.

[0057] This embodiment uses a height adjustment component 21 with a specific structure. First, the height adjustment component 21 can be hidden inside the crossbeam 2. Second, the height of the support leg 4 can be adjusted by pressing. It has the advantages of simple structure, convenient operation, standardization, and stability and reliability.

[0058] Example 4

[0059] Based on any of the embodiments in Examples 1-3, see Figure 1 , Figure 3 In this embodiment, a foldable backrest 26 is hinged to the rear end of the seat 1 via a side beam 5, which not only does not increase the size of the seat excessively, but also improves the comfort during use.

[0060] The above description is only a specific embodiment of this utility model. Any feature disclosed in this specification may be replaced by other equivalent features unless otherwise specified. All features or steps in all methods or processes disclosed may be combined in any way except for mutually exclusive features and / or steps.

Claims

1. A foldable bench seat, comprising a seat board (1), characterized in that: The seat (1) is provided with a rotatable crossbeam (2) at both the front and rear ends. Each crossbeam (2) is provided with a through hole (3). Each through hole (3) is provided with a support leg (4) that can extend to the top of the seat (1). The support legs (4) at both the front and rear ends can be folded to the bottom of the seat (1) by rotating the crossbeam (2).

2. The foldable bench seat according to claim 1, characterized in that: The seat (1) has symmetrical side beams (5) fixed on its left and right sides, and the crossbeams (2) are rotatably connected between the front end and the rear end of the two side beams (5).

3. A foldable bench seat according to claim 2, characterized in that: The side beam (5) is provided with a limiting rotating part (6) and a locking assembly (7) at both ends. One end of the limiting rotating part (6) is hinged to the side of the side beam (5) through a limiting pin (8), and the other end is provided with a locking groove (9). The bottom surface of the limiting rotating part (6) is provided with a limiting part (10) extending horizontally to the bottom of the side beam (5). The side surface of the limiting rotating part (6) is provided with a connecting part (11). The cross beam (2) is fixed between the limiting rotating parts (6) on the side beam (5) through the connecting part (11). The locking assembly (7) is fixed to the end face of the side beam (5). The locking assembly (7) has a locked state and an unlocked state. In the locked state, the locking assembly (7) is embedded in the locking groove (9) and the cross beam (2) cannot rotate. In the unlocked state, the locking assembly (7) is disengaged from the locking groove (9) and the cross beam (2) can rotate.

4. A foldable bench seat according to claim 3, characterized in that: The locking assembly (7) includes a handle (13), a plug (14), a connecting block (15), a return spring (16), and a locking shaft (17) for cooperating with the locking groove (9). The end of the side beam (5) is provided with a symmetrical U-shaped groove (18). The plug (14) is inserted and fixed to the end face of the side beam (5). The upper end of the handle (13) is hinged to the upper part of the plug (14). The middle part of the handle (13) is fixed with a connecting shaft. The lower end of the handle (13) is a control part. The control part is controllable under force. The locking assembly (7) is switched in state; the locking shaft (17) is slidably set in the U-shaped groove (18), one end of the return spring (16) is fixed on the limit pin (8), and the other end is fixed in the middle of the locking shaft (17). The connecting block (15) is movably connected between the connecting shaft and the locking shaft (17); in the locked state, the locking shaft (17) is embedded in the locking groove (9) to lock the crossbeam (2), and in the unlocked state, the locking shaft (17) is disengaged from the locking groove (9) to release the locking of the crossbeam (2).

5. A foldable bench seat according to claim 4, characterized in that: The locking groove (9) of the limiting rotating member (6) is provided with an arc-shaped guide (19). When switching from the unlocked state to the locked state, the arc-shaped guide (19) is used to make the locking shaft (17) automatically embed into the locking groove (9).

6. A foldable bench seat according to claim 4, characterized in that: The connecting part (11) is provided with a groove (12) that is adapted to the support leg (4), and the side of the support leg (4) fits into the groove (12).

7. A foldable bench seat according to any one of claims 1-5, characterized in that: The outer surface of the support leg (4) is provided with a positioning rack (20) along the axial direction. The crossbeam (2) is fixed with a height adjustment component (21) for cooperating with the positioning rack (20). The height adjustment component (21) has a natural state and an adjusted state. In the natural state, the height adjustment component (21) meshes with the positioning rack (20), and the support leg (4) cannot move in the through hole (3). In the adjusted state, the height adjustment component (21) disengages from the positioning rack (20), and the position of the support leg (4) in the through hole (3) is adjustable.

8. A foldable bench seat according to claim 7, characterized in that: The height adjustment assembly (21) includes a positioning housing (22), a control component (23), an elastic component (24), and an arc-shaped rack (25). The positioning housing (22) is fixed inside the crossbeam (2). The lower surface of the crossbeam (2) is provided with a clearance hole that matches the control component (23). One end of the control component (23) is a force-bearing part, and the other end is fixed with a wheel. The wheel is hinged inside the positioning housing (22). An arc-shaped rack (25) that matches the positioning rack (20) is fixed on the wheel. The elastic component (24) is vertically abutted against the middle of the control component (23) through the positioning housing (22). In the natural state, the arc-shaped rack (25) meshes with the positioning rack (20), and the support leg (4) cannot move in the through hole (3). In the adjustment state, the arc-shaped rack (25) disengages from the positioning rack (20), and the position of the support leg (4) in the through hole (3) is adjustable.

9. A foldable bench seat according to claim 2, characterized in that: The rear end of the seat (1) is hinged to a foldable backrest (26) via a side beam (5).

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