Rice transplanter

Abstract

The utility model relates to a rice transplanter which comprises a driving position and a planting part, and the driving position is arranged on a bottom plate of a rice transplanter body; the planting part is positioned at one end of the transplanter body; the chair is connected with the supporting part through a folding assembly; wherein the supporting part is detachably connected with the bottom plate; when the seat is in an unfolded state, the horizontal distance between one end, far away from the driving position, of the seat and the planting part is not less than 60cm in the length direction of the rice transplanter body; when the seat is in the folded state, the horizontal distance between the seat and the planting part is not less than 100cm in the length direction of the rice transplanter body. The folding assembly has the function of enabling the seat to be freely switched between the unfolded state and the folded state. When seedling feeding personnel supplement seedlings, the seat is folded; when a seedling person has a rest, the seat is unfolded. When the seat is unfolded, the legs of a seedling-feeding person have enough activity space when the seedling-feeding person sits down, so that the comfort of the seedling-feeding person is improved; when the seat is folded, the bottom plate has enough space for a seedling feeding person to walk.

Description

Technical Field

[0001] The utility model relates to the technical field of crop planting mechanization, and particularly relates to a rice transplanter. Background Art

[0002] Nowadays, with the deepening of the degree of mechanization, rice transplanters are also widely used in agriculture. Generally, a motorized rice transplanter has a machine body including front wheels and rear wheels, a power unit and a planting unit arranged on the machine body, as well as a machine body cover and a chassis, etc. Among them, the planting operation part of the rice transplanter is an important part for controlling the operation and work of the planting unit of the rice transplanter. During the rice transplanting process, in order to improve the rice transplanting efficiency and quality, a special rice feeding operator will be equipped at the rear end of the rice transplanter to place rice seedlings for the rice transplanter. Since the structure of the rice transplanter is compact, generally, the rice transplanter will be filled with rice seedlings, and the rice feeding operator stands behind the driver's seat and is ready to feed rice seedlings at any time. Since the rice transplanting season is short and the task is heavy, the rice feeding operator has a long working time and extremely high intensity.

[0003] Grant publication number: CN 106385893 B, application date: November 10, 2016, invention name: Patent for the frame of a rice transplanter, which is used to facilitate the overall movement of the rice transplanter and the placement of the rice transplanter. It includes a frame body, front wheels, rear wheels, a seat and a steering wheel. A box body is provided on the frame body between the steering wheel and the seat. Auxiliary wheels are detachably installed on the front wheels and the rear wheels. A locking cylinder is fixed on one side of the auxiliary wheel. A driver is provided on the outer side of the locking cylinder. A locking hole is provided on the driver. A bolt threadedly connected to the wheel hub is provided in the locking hole. A handle is provided on the outer wall of the driver; A seedling-carrying assembly is provided on the front side of the frame body. The seedling-carrying assembly mainly includes an upper support member and a lower support member. The upper support member can move up and down relative to the lower support member. This rice transplanter frame can travel quickly on a hardened road surface. A seedling-carrying assembly is provided on the front side of the frame body. The seedling-carrying assembly can be folded, which is not only convenient for the storage of the whole machine, but also convenient for the placement of the rice seedling tray, and has a firm structure.

[0004] Although the above-mentioned prior art discloses a seat, this seat is for the convenience of the driver to operate the steering wheel and control the traveling direction of the rice transplanter. At the same time, the technical effect achieved by the above-mentioned prior art is that when it is necessary to walk on a hardened ground, the auxiliary wheels can be installed on the front wheels and the rear wheels. At this time, the whole rice transplanter can travel quickly on the hardened ground; when rice transplanting operation is required, the auxiliary wheels can be removed by rotating the driver, and the installation and disassembly are convenient; and the auxiliary wheels can be conveniently placed on the box body and the support plate. At this time, a rice seedling tray can be placed on the auxiliary wheels, achieving the effect of multi-purpose use; A seedling-carrying assembly is provided on the front side of the frame body. The seedling-carrying assembly can be folded, which is not only convenient for the storage of the whole machine, but also convenient for the placement of the rice seedling tray. Regarding how to relieve the fatigue of the rice feeding operator and increase the working comfort, the above-mentioned prior art does not give any technical inspiration. Summary of the Utility Model

[0005] In view of the defect that the above-mentioned prior art does not give any technical inspiration on how to relieve the fatigue of the seedling-feeding personnel, the purpose of the present utility model is to provide a rice transplanter.

[0006] The technical solution provided by the present utility model is as follows: a rice transplanter, comprising:

[0007] A driver's seat, which is installed on the bottom plate of the rice transplanter body;

[0008] A planting part, which is located at one end of the rice transplanter body;

[0009] It further comprises:

[0010] A support part and a seat connected to the support part through a folding component;

[0011] When the seat is in the unfolded state, along the length direction of the rice transplanter body, the horizontal distance between the end of the seat far from the driver's seat and the planting part is not less than 60 cm;

[0012] When the seat is in the folded state, along the length direction of the rice transplanter body, the horizontal distance between the seat and the planting part is not less than 100 cm.

[0013] Furthermore, the width of the support part does not exceed the width of the backrest of the driver's seat; the top end of the support part does not exceed the top of the backrest of the driver's seat.

[0014] Furthermore, along the width direction of the rice transplanter body, the width of the support part does not exceed 1 / 3 of the width of the bottom plate.

[0015] Furthermore, along the width direction of the rice transplanter body, the support part and the seat are roughly located in the middle of the bottom plate, and the horizontal distance between the support part and the end of the bottom plate is not less than the long side of the seedling tray.

[0016] Furthermore, along the length direction of the rice transplanter body, the horizontal distance between the support part and the driver's seat is a, and the horizontal distance between the support part and the planting part is b, a:b ≤ 1:5.

[0017] Furthermore, the bottom plate is provided with a plurality of through holes, and the upright post is detachably connected to the bottom plate through the through holes.

[0018] Furthermore, the folding component comprises:

[0019] A first bracket, which is connected to the support part;

[0020] A second bracket, which is connected to the seat, and one end of the second bracket is movably connected to the first bracket;

[0021] A locking mechanism that can lock the second bracket to prevent it from further rotating when the second bracket rotates to be perpendicular to the first bracket.

[0022] Further, the locking mechanism includes a limiting member and a check mechanism;

[0023] One end of the limiting member is movably connected to the first bracket, and the other end is slidably connected to the second bracket;

[0024] The check mechanism is installed inside the second bracket, and the top of the check mechanism abuts against the upper end face of the second bracket.

[0025] Further, the check mechanism includes an elastic member and a locking plate fixedly installed on the elastic member; the top of the locking plate abuts against the upper end face of the second bracket.

[0026] Further, when the check mechanism is installed inside the second bracket, the elastic member is in a stressed state;

[0027] When the seat rotates from the folded position to the unfolded position, the limiting member moves from one side of the locking plate to the other side, and at the same time the locking plate automatically rebounds, and the limiting member abuts against the side surface of the locking plate.

[0028] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0029] (1) In the present utility model, a support part detachably connected to the bottom plate is provided on the bottom plate of the transplanter body. The support part is connected to the seat through a foldable assembly, and the function of the foldable assembly is to switch the seat back and forth between the unfolded state and the folded state. When the seedling-feeding personnel need to replenish seedlings, the seat is folded; when the seedling-feeding personnel rest, the seat is unfolded.

[0030] (2) When the seat of the present utility model is in the unfolded state, along the length direction of the transplanter body, the horizontal distance between the end of the seat far from the driver's seat and the planting part is not less than 60 cm, so that when the seedling-feeding personnel sit down, there is enough space for their legs to move, improving the comfort of the seedling-feeding personnel.

[0031] (3) When the seat of the present utility model is in the folded state, along the length direction of the transplanter body, the horizontal distance between the seat and the planting part is not less than 100 cm, so that there is enough space on the bottom plate for the seedling-feeding personnel to walk, and at the same time it does not affect the placement of the seedling-raising tray. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the specific position of the foldable seat in a transplanter in an embodiment of the present application;

[0033] Figure 2Schematic diagram of the specific position of the foldable seat on the transplanter from another angle in an embodiment of the present application;

[0034] Figure 3 Schematic diagram of the overall structure of the foldable seat when unfolded in an embodiment of the present application;

[0035] Figure 4 Schematic diagram of the overall structure of the foldable seat when unfolded from another angle in an embodiment of the present application;

[0036] Figure 5 Schematic diagram of the overall structure of the foldable seat when folded in an embodiment of the present application;

[0037] Figure 6 Schematic diagram of the overall structure of the foldable seat when folded from another angle in an embodiment of the present application;

[0038] Figure 7 Schematic diagram of the disassembled structure of the foldable seat in an embodiment of the present application;

[0039] Figure 8 Schematic diagram of the overall structure of the folding component when unfolded in an embodiment of the present application;

[0040] Figure 9 Schematic diagram of the overall structure of the folding component when unfolded from another angle in an embodiment of the present application;

[0041] Figure 10 Schematic diagram of the overall structure of the folding component when folded in an embodiment of the present application;

[0042] Figure 11 Cross-sectional view of the folding component in an embodiment of the present application;

[0043] Figure 12 Cross-sectional view of the folding component from another angle in an embodiment of the present application;

[0044] Figure 13 Schematic diagram of the elastic component detached from the folding component in an embodiment of the present application.

[0045] Explanation of the reference numerals in the schematic diagram:

[0046] Folding component 1, first bracket 11, second bracket 12, limiting member 13, anti-return mechanism 14, upper end surface 121 of the second bracket, first side surface 122, second side surface 123, transverse connecting rod 124, protruding portion 125, side plate 131, fixing member 132, elastic component 141, locking plate 142;

[0047] Support portion 2, column 21, cross beam 22;

[0048] Seat 3;

[0049] Driver's seat 4;

[0050] Planting unit 5;

[0051] Bottom plate 6. Specific implementation manner

[0052] To further understand the content of the present utility model, the present utility model will be described in detail in conjunction with the drawings and embodiments.

[0053] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope that the present utility model can be implemented.

[0054] During the rice transplanting process, in order to improve the transplanting efficiency and quality, special seedlings-loading personnel will be equipped at the rear end of the rice transplanter to place seedlings for the rice transplanter. Since the structure of the rice transplanter is compact, generally, the rice transplanter will be filled with seedlings. The seedlings-loading personnel stand behind the driver's seat and are ready to load seedlings at any time. Since the rice transplanting season is short and the task is heavy, the seedlings-loading personnel have a long working time and extremely high intensity.

[0055] When using a rice transplanter, the seedling tray is an essential component of the rice transplanter. The use of the seedling tray brings many advantages. First of all, it can significantly save the amount of seeds used, thus directly reducing the production cost. This is because the design of the seedling tray makes the distribution of seeds more uniform, avoiding the situation of dense or sparse seeds in the traditional sowing method and ensuring the uniformity of seedling emergence. This uniform sowing method helps to maintain the consistency of the growth of plant seedlings. Whether in terms of growth speed or final growth state, it can reach a relatively unified standard.

[0056] In addition, the seedling tray can be used in conjunction with various manual and automatic seeders, which not only improves the seeding efficiency but also facilitates centralized management, further enhancing the work efficiency. During the transplanting process, the seedling tray can protect the roots of the seedlings from damage, which helps the seedlings quickly adapt to the new growth environment, slow down the seedlings quickly, and thus improve the survival rate.

[0057] The seedling tray is generally placed on a placement rack of a rice transplanter or directly on a bottom plate 6 of the rice transplanter. The rice seedling workers need to peel the seedlings off the seedling tray and then place the seedlings on the planting part 5, which requires repeated labor and consumes a lot of physical energy.

[0058] The present invention discloses a rice transplanter, comprising a driving position 4, a planting part 5 and a foldable seat. The driving position 4 is used to control the driving direction of the rice transplanter and is installed on a bottom plate 6 of the rice transplanter body. The planting part 5 is located at one end of the rice transplanter body, and the foldable seat is located between the driving position 4 and the planting part 5.

[0059] The foldable seat is mainly used for resting the rice transplanters, and comprises a support part 2 and a seat 3 vertically mounted on the bottom plate 6 of the rice transplanter, wherein the support part 2 and the seat 3 are connected by a folding assembly 1, and the folding assembly 1 is used to unfold or fold the seat 3. When the seat 3 is unfolded, the rice transplanters sit back to back with the driver.

[0060] In order to ensure timely replenishment of seedlings, 1 to 2 seedling workers may be required. In order to allow the seedling workers to have enough walking space, when the seat 3 is in the unfolded state, along the length direction of the transplanter body, the horizontal distance between the end of the seat 3 away from the driver's seat 4 and the planting part 5 is not less than 60 cm. The distance of 60 cm can ensure that even if the seat 3 is not folded in time, the seedling workers can walk back and forth without space restrictions. When the seat 3 is in the folded state, along the length direction of the transplanter body, the horizontal distance between the seat 3 and the planting part 5 is not less than 100 cm. Since the support part 2 does not occupy a large space on the bottom plate 6, the space on the bottom plate 6 can be fully utilized at this time, and more seedling trays can be placed.

[0061] The support part 2 is arranged along the width direction of the rice transplanter body, and its width does not exceed the width of the backrest of the driver's seat 4. On the one hand, it is to make the support part 2 not protrude too much to prevent people from tripping when walking, and on the other hand, it is to occupy as little space as possible on the bottom plate 6. The top of the support part 2 will not exceed the top height of the backrest of the driver's seat 4, in order to prevent the rice transplanter from sitting too high. If the driver stops the car in an emergency, the rice transplanter will lean back and cause danger. When the seat 3 is in the unfolded state, the vertical height from the bottom plate 6 is preferably about 40 cm.

[0062] Along the width direction of the rice transplanter body, the width of the support part 2 does not exceed 1 / 3 of the width of the bottom plate 6, and is roughly centered, so that both sides of the support part 2 can be placed on the seedling tray, and the horizontal distance between the support part 2 and the end of the bottom plate 6 is not less than the long side of the seedling tray. After the seedling worker takes the seedlings from the seedling tray, even if he directly drops the seedling tray onto the bottom plate 6, it can be ensured that the seedling tray does not fall into the paddy field.

[0063] In addition, along the length direction of the transplanter body, the horizontal distance between the support part 2 and the driver's seat 4 is a, and the horizontal distance between the support part 2 and the planting part 5 is b, where a:b ≤ 1:5. That is to say, the support part 2 is arranged adjacent to the backrest of the seat 3, and at the same time, the support part 2 is relatively far from the planting part 5. The purpose of such a setting is that, on the one hand, the seedling-feeding personnel and the driver can sit back to back, which is convenient for timely replenishment of seedlings; on the other hand, it can avoid interfering with the back-and-forth movement of the seedling-feeding personnel. When the seat 3 is unfolded, the horizontal distance between the end of the seat 3 away from the driver's seat 4 and the planting part 5 is not less than 60 cm. In other words, there is enough space for the legs to move, improving the comfort of the seedling-feeding personnel.

[0064] More specifically, the support part 2 includes a column 21 and a cross beam 22 connecting the column 21. The column 21 is connected to the bottom plate 6, and the number of columns 21 is not less than 2.

[0065] The bottom plate 6 is a perforated bottom plate. The support part 2 and the bottom plate 6 are detachably connected by a bolt assembly. The perforated bottom plate can not only allow water to flow down through the openings in time to ensure the dryness of the bottom plate 6, but also adjust the connection position between the support part 2 and the bottom plate 6. It only needs to remove the bolt assembly and reinstall it.

[0066] The folding assembly 1 is the main component that can unfold or fold the seat 3, including a first bracket 11, a second bracket 12 and a locking mechanism. Among them, the first bracket 11 is detachably connected to the column 21 of the support part 2, for example, it can be connected by bolts. The second bracket 12 is detachably connected to the seat 3, and one end of the first bracket 11 and one end of the second bracket 12 are movably connected. When the second bracket 12 rotates to be perpendicular to the first bracket 11, the locking mechanism can lock the second bracket to prevent it from continuing to rotate.

[0067] The locking mechanism includes a limiting member 13 and a check mechanism 14. Among them, the check mechanism 14 is installed on the second bracket 12 and forms an inclined angle with the second bracket 12. The second bracket 12 includes a second bracket upper end face 121, a first side face 122 and a second side face 123. The two side faces are fixedly connected by the second bracket upper end face 121. Corresponding chutes are provided on the first side face 122 and the second side face 123. One end of the limiting member 13 is movably connected to the first bracket 11, and the other end can slide along the chute of the second bracket 12.

[0068] More specifically, the limiting member 13 includes a side plate 131 and a fixing member 132. It is advisable to set two side plates 131, both of which are located outside the first bracket 11 and the second bracket 12. One end of the side plate 131 is movably connected to the first bracket 11, and the other end is connected by the fixing member 132. The fixing member 132 passes through the chute to drive the side plate 131 to slide along the chute.

[0069] The first end of the sliding groove is the end far from the first bracket 11, and the second end of the sliding groove is the end close to the first bracket 11. The check mechanism 14 is installed between the first side surface 122 and the second side surface 123 and is close to the second end of the sliding groove.

[0070] The check mechanism 14 includes an elastic member 141 and a locking plate 142 fixedly installed on the elastic member 141. The locking plate 142 is located between the first side surface 122 and the second side surface 123. A transverse connecting rod 124 and a convex portion 125 are fixedly connected to the inner surface of the second side surface 123. The elastic member 141 is sleeved on the transverse connecting rod 124, and the extension portion of the elastic member 141 is limited by the convex portion 125.

[0071] When the check mechanism 14 is installed between the first side surface 122 and the second side surface 123, the elastic member 141 is pre-stressed and installed, and at the same time, the locking plate 142 is stressed. Since the locking plate 142 is limited by the upper end surface 121 of the second bracket, the locking plate 142 cannot rotate and abuts against the upper end surface 121 of the second bracket under the stressed state.

[0072] The elastic member 141 is preferably a cylindrical helical torsion spring, which is sleeved on the transverse connecting rod 124. One end of the cylindrical helical torsion spring is limited by the convex portion 125. Due to the reduction of the effective number of turns of the cylindrical helical torsion spring during installation, both the locking plate 142 and the elastic member 141 tend to rotate clockwise. However, since the locking plate 142 is limited by the upper end surface 121 of the second bracket, the locking plate 142 cannot rotate and can only tightly abut against the upper end surface 121 of the second bracket.

[0073] When the seat 3 is changed from the folded state to the unfolded state, the second bracket 12 rotates synchronously. During the rotation of the second bracket 12, the fixing member 132 slides along the sliding groove and moves from one side of the locking plate 142 to the other side, and the locking plate 142 automatically rebounds. When the second bracket 12 rotates to be perpendicular to the first bracket 11, the fixing member 132 abuts against the side surface of the locking plate 142.

[0074] When the seat 3 is changed from the folded state to the unfolded state, the specific process of the fixing member 132 moving from one side of the locking plate to the other side is as follows: When the fixing member 132 passes through the cylindrical helical torsion spring, the effective number of turns of the cylindrical helical torsion spring is further reduced, the torque increases, and the locking plate 142 is temporarily separated from the upper end surface 121 of the second bracket. However, the tendency of the locking plate 142 to rotate clockwise increases synchronously due to the increase in torque. Therefore, when the fixing member 132 overcomes the torque of the cylindrical helical torsion spring and passes through the locking plate 142, the locking plate 142 immediately rebounds.

[0075] When the rice transplanting operator sits down to rest, the fixing member 132 tightly abuts against the side surface of the locking plate 142, which is equivalent to giving a thrust to the locking plate 142, further increasing the clockwise rotation tendency of the locking plate 142. However, since the locking plate 142 is limited in position, it cannot rotate, and the stability of the seat 3 is very good after it is unfolded.

[0076] When the seat 3 needs to be folded, press the lower end of the locking plate 142, the number of effective turns of the cylindrical helical torsion spring decreases, and the locking plate 142 moves away from the upper end surface 121 of the second bracket and the chute, so that the fixing member 132 can freely pass through the chute.

[0077] The foldable seat includes the following installation and use steps:

[0078] Install the foldable seat on the bottom plate 6 of the rice transplanter, specifically between the driver's seat 4 and the planting part 5 of the rice transplanter; when the rice transplanting operator needs to replenish the rice seedlings in the interpolation part of the rice transplanter, fold the seat 3; when there is no need to replenish the rice seedlings, unfold the seat 3 for the rice transplanting operator to rest.

[0079] Manually unfold the seat 3 to drive the folding assembly 1 to rotate. When the foldable seat rotates to the horizontal position, a locking structure is formed inside the folding assembly 1 to limit the continued rotation of the seat 3.

[0080] Press the locking plate 142 in the folding assembly 1, the folding assembly 1 is unlocked, and the seat 3 is folded and retracted downward synchronously with the folding assembly 1.

[0081] The above has schematically described the present invention and its embodiments. This description is not restrictive, and what is shown in the drawings is only one of the embodiments of the present invention. The actual structure is not limited to this. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural modes and embodiments without creative work without departing from the creative purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A rice transplanter, comprising: A driving position (4), the driving position (4) being mounted on a bottom plate (6) of the rice transplanter body; A planting part (5), the planting part (5) being located at one end of the rice transplanter body; It is characterized by further comprising: A support portion (2) and a seat (3) connected to the support portion (2) via a folding assembly (1); Wherein, the support portion (2) and the bottom plate (6) are detachably connected; When the seat (3) is in an unfolded state, along the length direction of the rice transplanter body, the horizontal distance between the end of the seat (3) away from the driving position (4) and the planting part (5) is not less than 60 cm; When the seat (3) is in a folded state, the horizontal distance between the seat (3) and the planting part (5) along the length direction of the rice transplanter body is not less than 100 cm.

2. A rice transplanter according to claim 1, characterized in that: The width of the support portion (2) does not exceed the width of the backrest of the driver's seat (4); and the top end of the support portion (2) does not exceed the top of the backrest of the driver's seat (4).

3. A rice transplanter according to claim 2, characterized in that: Along the width direction of the rice transplanter body, the width of the support portion (2) does not exceed 1 / 3 of the width of the bottom plate (6).

4. A rice transplanter according to claim 3, characterized in that: Along the width direction of the rice transplanter body, the support part (2) and the seat (3) are approximately located in the middle of the bottom plate (6), and the horizontal distance between the support part (2) and the end of the bottom plate (6) is not less than the long side of the rice seedling tray.

5. A rice transplanter according to claim 4, characterized in that: Along the length direction of the rice transplanter body, the horizontal distance between the support part (2) and the driving position (4) is a, and the horizontal distance between the support part (2) and the planting part (5) is b, and a:b≤1:

5.

6. A rice transplanter according to claim 1, characterized in that: The bottom plate (6) is provided with a plurality of through holes, and the upright posts (21) are detachably connected to the bottom plate (6) via the through holes.

7. A rice transplanter according to claim 1, characterized in that: The folding assembly (1) comprises: A first bracket (11), the first bracket (11) being connected to the supporting portion (2); A second bracket (12), the second bracket (12) being connected to the seat (3), and one end of the second bracket (12) being movably connected to the first bracket (11); A locking mechanism, when the second bracket (12) rotates to be perpendicular to the first bracket (11), the locking mechanism can lock the second bracket (12) to prevent it from continuing to rotate.

8. A rice transplanter according to claim 7, characterized in that: The locking mechanism comprises a limiting member (13) and a non-return mechanism (14); One end of the limiting member (13) is movably connected to the first bracket (11), and the other end is slidably connected to the second bracket (12); The non-return mechanism (14) is installed inside the second bracket (12), and the top of the non-return mechanism (14) abuts against the upper end surface (121) of the second bracket.

9. A rice transplanter according to claim 8, characterized in that: The anti-return mechanism (14) comprises an elastic component (141) and a locking plate (142) fixedly mounted on the elastic component (141); the top of the locking plate (142) abuts against the upper end surface (121) of the second bracket.

10. A rice transplanter according to claim 9, characterized in that: When the non-return mechanism (14) is installed inside the second bracket (12), the elastic component (141) is in a stressed state; When the seat (3) is rotated from the folding position to the unfolding position, the limiting member (13) moves from one side of the locking plate (142) to the other side, and the locking plate (142) automatically rebounds, and the limiting member (13) abuts against the side surface of the locking plate (142).

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