Linkage unlocking structure and vehicle

Abstract

The utility model relates to vehicle technical field discloses a kind of linkage unlocking structure and vehicle, linkage unlocking structure includes: fixed supporting leg;Seat cushion framework, with fixed supporting leg rotation connection;Backrest framework, backrest lock is provided on backrest framework, backrest lock is suitable for locking backrest framework in preset position;Unlocking cable, one end of unlocking cable is connected with backrest lock, the other end is connected with seat cushion framework;Seat cushion framework has locking position and completely unlocking position, unlocking trigger position, when seat cushion framework rotates from locking position to completely unlocking position, pass unlocking trigger position and trigger unlocking cable to pull backrest lock, to remove the locking of backrest framework.The linkage unlocking structure provided by the utility model is driven backrest lock action by cable linkage, to automatically remove the locking of backrest framework, without additional operation backrest lock, simplify operation process, improve user use convenience.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a linkage unlocking structure and a vehicle. Background Technology

[0002] In related technologies, in order to realize the function of converting the rear seats of a car into a bed, only the backrest and seat cushion can usually be unlocked separately. This means that after the seat cushion is unlocked and folded down, the backrest still needs to be unlocked separately, requiring a total of two unlocking operations, which is inconvenient. Utility Model Content

[0003] In view of this, the present invention provides a linkage unlocking structure and vehicle to solve the problem that the backrest and seat cushion need to be unlocked separately when the rear seats of a car are converted into a bed.

[0004] Firstly, this utility model provides a linkage unlocking structure, including: Fixed support legs; The seat frame is rotatably connected to the fixed support legs; Backrest frame, with a backrest lock on the backrest frame, the backrest lock is suitable for locking the backrest frame in a preset position; Unlock cable; one end of the unlock cable is connected to the backrest lock, and the other end is connected to the seat cushion frame. The seat cushion frame has a locked position and a fully unlocked position. The seat cushion frame also includes an unlock trigger position located between the locked position and the fully unlocked position. When the seat cushion frame rotates from the locked position to the fully unlocked position, it passes through the unlock trigger position and triggers the unlock cable to pull the backrest lock to release the lock on the backrest frame.

[0005] Beneficial effects: One end of the unlocking cable is connected to the backrest lock, and the other end is connected to the seat cushion frame. By connecting the two ends of the unlocking cable to the backrest lock and the seat cushion frame respectively, when the seat cushion frame passes the unlock trigger position during folding, the cable can trigger the backrest lock to move, thus automatically releasing the lock on the backrest frame. Only folding the seat cushion frame is required to automatically trigger the backrest unlock. The rotation of the seat cushion frame serves as the trigger power source, automatically releasing the backrest lock via the unlocking cable. No additional operation of the backrest lock is needed, thus completing the backrest unlocking action simultaneously during a single seat cushion folding operation. This simplifies the operation process and improves user convenience.

[0006] In one optional embodiment, the fixed support leg is provided with a support leg shaft hole; The seat frame includes: Seat cushion frame body; A connecting arm is connected to the seat cushion frame body, and the connecting arm is provided with a seat cushion shaft hole; The hinge part is hinged at one end to the support foot shaft hole of the fixed support foot, and at the other end to the seat cushion shaft hole of the connecting arm.

[0007] In one alternative implementation, the other end of the unlocking cable is connected to the hinge section.

[0008] Beneficial effects: A hinge is installed between the connecting arm and the fixed support leg, and the other end of the unlocking cable is connected to the hinge. By reasonably limiting the rotation trajectory of the hinge, the seat cushion frame can be rotated around the fixed support leg while the pulling stroke and timing of the unlocking cable are precisely controlled. This ensures that when the seat cushion frame rotates to the unlocking trigger position, the hinge can pull the unlocking cable at the optimal angle, avoiding delayed response or false triggering of the backrest lock due to insufficient or excessive preload of the unlocking cable. It also avoids excessively long travel of the unlocking cable, which would hinder effective transmission, ensuring stable and accurate unlocking action. Furthermore, it reduces the bending angle of the unlocking cable during movement, reducing wear and resistance, extending service life, and ensuring that the force direction of the unlocking cable always matches the movement trajectory, improving linkage reliability and guaranteeing stable execution of the unlocking action. It ensures that the unlocking cable is pulled smoothly during the folding of the seat cushion frame, effectively transmitting power to the backrest lock and achieving precise triggering of the unlocking action.

[0009] In one alternative embodiment, the fixed leg is further provided with a first limiting portion and a second limiting portion; the first limiting portion and the second limiting portion are adapted to limit the travel range of the hinge portion when rotating relative to the fixed leg, wherein the first limiting portion is used to limit the stop point of the hinge portion in the locked position, and the second limiting portion is used to limit the stop point of the hinge portion in the fully unlocked position.

[0010] Beneficial effects: By forming a first limiting part and a second limiting part on the fixed support leg, the rotation angle of the hinge part can be effectively constrained to prevent it from exceeding the design stroke range, thereby avoiding failure of the unlocking cable due to excessive stretching or retraction; at the same time, it ensures that the hinge part moves along the preset trajectory during the flipping process of the seat cushion frame, so that the traction action of the unlocking cable and the response timing of the backrest lock are precisely matched.

[0011] In one optional embodiment, the rotation angle of the hinge is B, in degrees, wherein the value of B ranges from 10 to 45 degrees.

[0012] Beneficial effects: By limiting the rotation angle B of the hinge to the aforementioned range, the effective travel required for the seat frame to flip is ensured, while avoiding structural interference or excessive stress on the unlocking cable due to excessive rotation angle. The rotation angle of the hinge needs to be coordinated with the stops of the first and second limiting parts to ensure that the unlocking action is always within a controllable range.

[0013] In one alternative embodiment, the hinge portion is configured as a C-shaped bracket structure, with the open end of the C-shaped bracket structure facing away from the backrest frame.

[0014] Beneficial effects: By constructing the hinge part as a C-shaped support structure with its open end facing away from the backrest frame, it provides sufficient operating space for the rotation of the connecting arm and reduces motion interference; at the same time, it ensures that the connecting arm can swing smoothly during the flipping process.

[0015] In one alternative embodiment, one end of the hinge portion is hinged to the foot pivot hole of the fixed foot via a hinge pivot; the other end of the hinge portion is hinged to the seat pivot hole of the connecting arm via a seat pivot. And / or, the linkage unlocking structure also includes a backrest pivot, the backrest frame being adapted to rotate around the backrest pivot.

[0016] In one alternative embodiment, the seat frame further includes a floor lock plug, which is located on the side of the seat frame body away from the connecting arm and is adapted to lock the seat frame when it is in the locked position.

[0017] Beneficial effects: The ground lock plug works with the ground lock seat on the vehicle floor, automatically inserting and locking after the seat frame is flipped into place, enhancing the stability of the seat during use; when unlocking is required, the operator only needs to move the seat to disengage the ground lock plug from the ground lock seat, achieving quick unlocking and facilitating the flipping of the seat frame.

[0018] In one alternative embodiment, the linkage unlocking structure further includes a motor drive mechanism adapted to drive the seat cushion frame to rotate relative to the fixed support leg, and / or drive the backrest frame to rotate.

[0019] Beneficial effects: By adding a motor drive mechanism, the seat cushion frame and backrest frame can be electrically linked and folded. Users only need to trigger it through in-vehicle buttons or remote control commands. For example, the switch can be placed on the central control screen, and the system will automatically perform unlocking, flipping and resetting actions, improving the intelligent operation experience.

[0020] Secondly, this utility model also provides a vehicle, comprising: The vehicle body, and the linkage unlocking structure as described above, which is installed inside the vehicle body.

[0021] Since the vehicle includes a linkage unlocking mechanism, which has the same effect as the linkage unlocking mechanism, it will not be described in detail here. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the linkage unlocking structure of this utility model; Figure 2 This is a side view of the linkage unlocking structure when both the backrest frame and the seat cushion frame of this utility model are in the locked position. Figure 3 This is a side view of the linkage unlocking structure when the seat cushion frame of this utility model is in the unlocking trigger position; Figure 4 This is a side view of the linkage unlocking structure when both the backrest frame and the seat cushion frame of this utility model are in the unlocked position. Figure 5 This is a side view of the linkage unlocking structure when the seat cushion frame of this utility model is folded further to the fully unlocked position; Figure 6 for Figure 1 A magnified view of a portion of the image.

[0024] Explanation of reference numerals in the attached figures: 1. Backrest frame; 2. Backrest lock; 21. Lock hook; 3. Unlocking cable; 4. Seat cushion frame; 41. Seat cushion frame body; 42. Connecting arm; 421. Seat cushion shaft hole; 43. Hinge part; 44. Floor lock plug; 6. Fixed support leg; 61. First limiting part; 62. Second limiting part; 63. Support leg shaft hole; 7. Seat cushion pivot; 8. Hinge pivot; 9. Backrest pivot. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] To improve vehicle space utilization, rear seatbacks can usually be folded down to increase luggage space. However, if only the backrests are folded down, the seat cushions and trunk floor often create a stepped difference in height, resulting in an uneven surface that hinders the placement of items or the expansion into a resting space. This is especially problematic as it prevents the rear seats from being converted into a bed, impacting both comfort and practicality. Some models, in order to achieve a flat surface between the rear seats and trunk, further fold down the seat cushions to allow for folding down the seat cushions as well. By folding down both the seat cushions and backrests separately, the rear seatbacks fold down to form a continuous plane with the trunk, effectively eliminating the stepped difference and creating a seamless flow between the rear space and the trunk. This flatter space can then be easily converted into a bed or storage platform.

[0030] Since the backrest and seat cushion are locked to the vehicle body separately, in order to realize the function of converting the rear seats of a car into a bed, the backrest and seat cushion can usually only be unlocked separately. This means that after the seat cushion is unlocked and folded, the backrest must also be unlocked separately, requiring two unlocking operations in total, which is inconvenient.

[0031] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0032] According to an embodiment of the present invention, in one aspect, a linkage unlocking structure is provided, comprising: Fixed support leg 6; The seat frame 4 is rotatably connected to the fixed support leg 6; Backrest frame 1, backrest lock 2 is provided on backrest frame 1, backrest lock 2 is suitable for locking backrest frame 1 in a preset position. Unlock cable 3. One end of unlock cable 3 is connected to backrest lock 2, and the other end is connected to seat cushion frame 4. The seat cushion frame 4 has a locked position and a fully unlocked position. The seat cushion frame 4 also includes an unlock trigger position located between the locked position and the fully unlocked position. When the seat cushion frame 4 rotates from the locked position to the fully unlocked position, it passes through the unlock trigger position and triggers the unlock cable 3 to pull the backrest lock 2 to release the lock on the backrest frame 1.

[0033] The linkage unlocking structure in this embodiment uses the seat cushion frame 4 and the backrest frame 1 as the main structure. The seat cushion frame 4 is connected to the vehicle body through the fixed support leg 6 and can rotate around it to realize the folding of the seat cushion. The backrest frame 1 is fixed to the vehicle body through the backrest lock 2 to keep the backrest stable.

[0034] One end of the unlocking cable 3 is connected to the backrest lock 2, and the other end is connected to the seat cushion frame 4. By connecting the two ends of the unlocking cable 3 to the backrest lock 2 and the seat cushion frame 4 respectively, when the seat cushion frame 4 passes the unlocking trigger position during the folding process, it can drive the backrest lock 2 to move through the cable linkage, thereby automatically releasing the lock on the backrest frame 1.

[0035] When the seat cushion frame 4 rotates from the locked position to the fully unlocked position, it passes the unlock trigger position. At this time, the unlocking cable 3 connected to the seat cushion frame 4 is activated, which in turn pulls the backrest lock 2, releasing the lock on the backrest frame 1 and achieving linkage unlocking of the seat cushion and backrest. Simply folding the seat cushion frame 4 automatically triggers the backrest unlocking. The rotation of the seat cushion frame 4 serves as the trigger power source, automatically releasing the backrest lock 2 via the unlocking cable 3. No additional operation of the backrest lock 2 is required, thus completing the backrest unlocking action simultaneously during a single seat cushion folding operation. This simplifies the operation process and improves user convenience.

[0036] The linkage unlocking structure in this embodiment can also save on the development of parts, so that parts such as unlocking handles and unlocking handle brackets do not need to be developed. Furthermore, the backrest has a cleaner appearance, with no shoulder unlocking device, which improves the aesthetics of the entire vehicle interior. At the same time, it reduces assembly complexity and production costs.

[0037] In some embodiments, combined with Figure 6 As shown, the fixed support 6 is provided with a support shaft hole 63; Seat cushion frame 4 includes: Seat cushion frame body 41; Connecting arm 42 is connected to seat cushion frame body 41, and connecting arm 42 is provided with seat cushion shaft hole 421; The hinge part 43 is hinged at one end to the support foot shaft hole 63 of the fixed support foot 6, and at the other end to the seat cushion shaft hole 421 of the connecting arm 42.

[0038] In some embodiments, the other end of the unlocking cable 3 is connected to the hinge portion 43.

[0039] The seat cushion frame body 41, as the main load-bearing structure of the seat cushion frame 4, has a connecting arm 42 at its bottom. In one implementation, the seat cushion frame body 41 can be directly hinged to the support foot 6's support foot 6 through the seat cushion shaft hole 421 of the connecting arm 42, thereby enabling the seat cushion frame 4 to rotate around the support foot 6. However, if the unlocking cable 3 is directly connected to the seat cushion frame body 41 or the connecting arm 42, the cable travel may be too long or jammed due to changes in the force direction during rotation, affecting the reliable unlocking of the backrest lock 2. Taking the unlocking cable 3 directly connected to the connecting arm 42 as an example, when the connecting arm 42 rotates around the support foot shaft hole 63, the rotation angle of the connecting arm 42 is greater than 90 degrees, which will cause a large deviation in the traction direction of the unlocking cable 3, thereby generating additional frictional resistance and affecting the cable transmission efficiency.

[0040] To avoid the aforementioned problems, this embodiment further incorporates a hinge portion 43 between the connecting arm 42 and the fixed support leg 6. The other end of the unlocking cable 3 is connected to the hinge portion 43. By reasonably limiting the rotation trajectory of the hinge portion 43, the function of flipping the seat cushion frame 41 around the fixed support leg 6 is satisfied, while precisely controlling the pulling stroke and timing of the unlocking cable 3. This ensures that when the seat cushion frame 4 rotates to the unlocking trigger position, the hinge portion 43 can pull the unlocking cable 3 at the optimal angle. This avoids delays or false triggering of the backrest lock 2 due to insufficient or excessive preload of the unlocking cable 3, and also prevents the unlocking cable 3 from having an excessively long stroke, which would hinder effective transmission. This ensures the stability and accuracy of the unlocking action. Furthermore, it reduces the bending angle of the unlocking cable 3 during movement, reducing wear and resistance, extending its service life, and ensuring that the force direction of the unlocking cable 3 always matches the movement trajectory, improving linkage reliability and guaranteeing stable execution of the unlocking action. This ensures that the unlocking cable 3 is pulled smoothly during the folding of the seat cushion frame 4, effectively transmitting power to the backrest lock 2 and achieving precise triggering of the unlocking action.

[0041] Optionally, the fixed position of the unlocking cable 3 can be adjusted in size according to the needs of different backrest locks 2, so as to adapt to the unlocking requirements of the backrest lock 2.

[0042] In some embodiments, combined with Figure 2 , Figure 6 As shown, the fixed support leg 6 also has a first limiting part 61 and a second limiting part 62; the first limiting part 61 and the second limiting part 62 are adapted to limit the travel range of the hinge part 43 when rotating relative to the fixed support leg 6, wherein the first limiting part 61 is used to limit the stop point of the hinge part 43 in the locked position, and the second limiting part 62 is used to limit the stop point of the hinge part 43 in the fully unlocked position.

[0043] By forming a first limiting part 61 and a second limiting part 62 on the fixed support leg 6, the rotation angle of the hinge part 43 can be effectively constrained to prevent it from exceeding the design stroke range, thereby avoiding the failure of the unlocking cable 3 due to excessive stretching or retraction; at the same time, it ensures that the hinge part 43 moves along a preset trajectory during the flipping process of the seat cushion frame 4, so that the traction action of the unlocking cable 3 and the response timing of the backrest lock 2 are precisely matched.

[0044] In this embodiment, the first limiting part 61 and the second limiting part 62 can specifically be boss structures provided on the fixed support leg 6. Their positions are symmetrically distributed relative to the rotation path of the hinge part 43. When the hinge part 43 rotates with the connecting arm 42 to the locked position, it contacts the first limiting part 61 to form a stop, ensuring that the unlocking cable 3 will not pull the backrest lock 2 and maintaining the backrest lock 2 in a stable locked state. When rotated in the unlocking direction to the unlocking trigger position, the hinge part 43 abuts against the second limiting part 62. At this time, the hinge part 43 contacts the second limiting part 62 to form a stop, ensuring that the unlocking cable 3 is pulled to the position that just triggers the release of the backrest lock 2, avoiding excessive pulling that could cause cable deformation or lock body malfunction, limiting the maximum stroke of the unlocking cable 3, and preventing cable overload.

[0045] In some embodiments, the rotation angle of the hinge portion 43 is B, in degrees, wherein the value of B ranges from 10 to 45 degrees.

[0046] This embodiment limits the rotation angle B of the hinge portion 43 to the aforementioned range, ensuring the effective travel required for the seat frame 4 to flip while avoiding structural interference or excessive force on the unlocking cable 3 due to excessive rotation angle. The rotation angle of the hinge portion 43 needs to be coordinated with the stops of the first limiting portion 61 and the second limiting portion 62 to ensure that the unlocking action is always within a controllable range.

[0047] Meanwhile, by limiting the rotation angle B of the hinge part 43 within the above range, it is possible to ensure clear feedback during the folding process of the seat frame 4, making it easy for the user to perceive whether the seat is fully unlocked or locked.

[0048] In some embodiments, the hinge portion 43 is configured as a C-shaped support structure, with the open end of the C-shaped support structure facing away from the backrest frame 1.

[0049] By constructing the hinge part 43 as a C-shaped bracket structure with its open end facing away from the backrest frame 1, sufficient operating space is provided for the rotation of the connecting arm 42, reducing motion interference; at the same time, it ensures that the connecting arm 42 can swing smoothly during the flipping process.

[0050] In some embodiments, one end of the hinge portion 43 is hinged to the support foot shaft hole 63 of the fixed support foot 6 via the hinge pivot 8; the other end of the hinge portion 43 is hinged to the seat cushion shaft hole 421 of the connecting arm 42 via the seat cushion pivot 7. And / or, the linkage unlocking structure also includes a backrest pivot 9, and the backrest frame 1 is adapted to rotate around the backrest pivot 9.

[0051] The hinge pivot 8 and the seat pivot 7 are arranged in parallel to ensure that the linkage between the hinge part 43 and the connecting arm 42 is stable and reliable.

[0052] The backrest pivot 9 can be fixed to the vehicle body, thereby providing stable support for the rotation of the backrest frame 1.

[0053] In some embodiments, the seat frame 4 further includes a floor lock plug 44, which is disposed on the side of the seat frame body 41 away from the connecting arm 42, and is adapted to lock the seat frame 4 when it is in the locked position.

[0054] The ground lock plug 44 works with the ground lock seat on the vehicle floor. After the seat frame 4 is flipped into place, it is automatically inserted and locked, enhancing the stability of the seat during use. When unlocking is required, the operator only needs to move the seat to remove the ground lock plug 44 from the ground lock seat, achieving quick unlocking and facilitating the flipping of the seat frame 4.

[0055] The specific form of cooperation between the ground lock plug 44 and the ground lock seat on the vehicle floor includes, but is not limited to, a pin-type, snap-on, or hook-type structure, which can realize automatic locking and releasing.

[0056] Additionally, the linkage unlocking structure can also be equipped with an independent unlocking button or handle, allowing users to trigger the unlocking action remotely and improving operational convenience. For example, it can be set on the side of the seat or the inner panel of the door, and connected to the ground lock plug 44 via a cable or linkage. Pressing the button will simultaneously release the locked state of the ground lock plug 44 and the ground lock seat, achieving single-step unlocking.

[0057] In some embodiments, the linkage unlocking structure further includes a motor drive mechanism adapted to drive the seat cushion frame 4 to rotate relative to the fixed support leg 6, and / or drive the backrest frame 1 to rotate.

[0058] By adding a motor drive mechanism, the seat cushion frame 4 and the backrest frame 1 can be electrically linked and folded. Users only need to trigger it through in-vehicle buttons or remote control commands. For example, the switch can be placed on the central control screen, and the system will automatically perform unlocking, flipping and resetting actions, improving the intelligent operation experience. Additionally, the motor drive mechanism can integrate a reduction gear set and a position sensor to ensure a smooth and precise flipping process; at the same time, the control module can preset multiple seat posture modes, and users can call the corresponding mode according to their needs to achieve a personalized space layout.

[0059] According to an embodiment of the present invention, another aspect provides a vehicle, comprising: The vehicle body, and the linkage unlocking structure as described above, which is installed inside the vehicle body.

[0060] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A linkage unlocking structure, characterized in that, include: Fixed support leg (6); The seat frame (4) is rotatably connected to the fixed support (6); A backrest frame (1) is provided with a backrest lock (2), which is adapted to lock the backrest frame (1) in a preset position; Unlock cable (3), one end of which is connected to the backrest lock (2) and the other end is connected to the seat cushion frame (4); The seat cushion frame (4) has a locked position and a fully unlocked position. The seat cushion frame (4) also includes an unlock trigger position located between the locked position and the fully unlocked position. When the seat cushion frame (4) rotates from the locked position to the fully unlocked position, it passes through the unlock trigger position and triggers the unlock cable (3) to pull the backrest lock (2) to release the lock on the backrest frame (1).

2. The linkage unlocking structure according to claim 1, characterized in that, The fixed support (6) is provided with a support shaft hole (63); The seat cushion frame (4) includes: Seat cushion frame body (41); A connecting arm (42) is connected to the seat cushion frame body (41), and the connecting arm (42) is provided with a seat cushion shaft hole (421). The hinge part (43) is hinged at one end to the foot shaft hole (63) of the fixed foot (6) and at the other end to the seat shaft hole (421) of the connecting arm (42).

3. The linkage unlocking structure according to claim 2, characterized in that, The other end of the unlocking cable (3) is connected to the hinge part (43).

4. The linkage unlocking structure according to claim 2, characterized in that, The fixed support leg (6) also has a first limiting part (61) and a second limiting part (62); the first limiting part (61) and the second limiting part (62) are adapted to limit the travel range of the hinge part (43) when rotating relative to the fixed support leg (6), wherein the first limiting part (61) is used to limit the stop point of the hinge part (43) in the locked position, and the second limiting part (62) is used to limit the stop point of the hinge part (43) in the fully unlocked position.

5. The linkage unlocking structure according to claim 4, characterized in that, The rotation angle of the hinge part (43) is B, in degrees, wherein the value of B is 10≤B≤45.

6. The linkage unlocking structure according to claim 2, characterized in that, The hinge part (43) is constructed as a C-shaped bracket structure, and the open end of the C-shaped bracket structure is set towards the side away from the backrest frame (1).

7. The linkage unlocking structure according to claim 2, characterized in that, One end of the hinge part (43) is hinged to the support foot shaft hole (63) of the fixed support foot (6) via the hinge pivot (8); the other end of the hinge part (43) is hinged to the seat cushion shaft hole (421) of the connecting arm (42) via the seat cushion pivot (7). And / or, the linkage unlocking structure further includes a backrest pivot (9), and the backrest frame (1) is adapted to rotate around the backrest pivot (9).

8. The linkage unlocking structure according to claim 2, characterized in that, The seat frame (4) further includes a floor lock plug (44), which is located on the side of the seat frame body (41) away from the connecting arm (42). The floor lock plug (44) is adapted to lock the seat frame (4) when the seat frame (4) is in the locked position.

9. The linkage unlocking structure according to any one of claims 1 to 8, characterized in that, The linkage unlocking structure also includes a motor drive mechanism, which is adapted to drive the seat cushion frame (4) to rotate relative to the fixed support (6) and / or drive the backrest frame (1) to rotate.

10. A vehicle, characterized in that, include: The vehicle body, and the linkage unlocking structure as described in any one of claims 1 to 9, disposed within the vehicle body.

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