A collapse structure for a seat

Abstract

The present invention relates to the field of automobile accessories, and specifically discloses a collapse structure for a seat, including a linear drive, a mounting assembly and a collapse assembly, wherein the mounting assembly includes a mounting seat and a movable seat, and the collapse assembly includes a clamping plate and a locking elastic member, wherein the A end of the clamping plate rotates in a limited position on the mounting seat, and the A' end is connected to one end of the locking elastic member, and the preload force of the locking elastic member is directed toward the output end of the linear drive, the fixed end of the linear drive is fixedly connected to the movable seat, and the output end is in contact with the clamping plate, and when the output end of the linear drive moves toward the A' direction, the angle between the clamping plate and the locking elastic member becomes smaller. The present invention improves the maximum energy absorption capacity of the collapse assembly as a whole by setting a special position and connection relationship between the clamping plate, the locking elastic member and the linear drive, and when subjected to a large impact force, the collapse assembly can avoid the instantaneous impact force from crushing the linear drive, and the collapse assembly can still recover after the external force is removed.

Description

Technical Field

[0001] The invention relates to the field of automobile accessories, in particular to seat accessories. Background Art

[0002] In car seats, linear actuators drive certain parts that come into contact with the human body to work, such as the massage head on the seat. However, since the linear actuator has a self-locking function, the parts driven by the linear actuator may cause harm to the human body in the event of a collision. Therefore, some seats are currently provided with a collapse structure, which is connected to the linear actuator. When subjected to a large impact force, the linear actuator can automatically collapse to prevent the parts driven by the linear actuator from causing harm to the human body. However, the existing collapse structure will be damaged and deformed after use, resulting in the linear actuator being unable to be used normally. In addition, the existing collapse structure usually uses a spring to buffer the impact force, but the energy absorption capacity of the spring is too small. If the impact force is too large, the spring retracts too quickly, and the human body will hit the internal structure of the seat, causing secondary damage to the human body.

[0003] The technical problem to be solved by this application is: how to improve the energy absorption capacity of the collapse structure inside the car seat. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a collapse structure for a seat.

[0005] The technical solution adopted by the present invention is: a collapse structure for a seat, including a linear drive, a mounting assembly and a collapse assembly, the mounting assembly including a mounting seat and a movable seat, the movable seat is in the mounting seat and slides in the upper limit direction in the AA' direction, the collapse assembly includes a clamping plate and a locking elastic member, the A end of the clamping plate rotates in the upper limit direction of the mounting seat, the A' end is connected to one end of the locking elastic member, the pre-tightening force of the locking elastic member is toward the direction of the output end of the linear drive, the fixed end of the linear drive is fixedly connected to the movable seat, and the output end abuts against the clamping plate, when the output end of the linear drive moves toward the A' direction, the angle between the clamping plate and the locking elastic member becomes smaller.

[0006] In some embodiments, the single clamping piece, the locking elastic member, and the output end position of the linear actuator form a triangular relationship.

[0007] In some embodiments, a movable block is fixedly provided at the output end of the linear actuator, the side wall of the clamping sheet abuts against the side wall of the movable block, the side wall of the clamping sheet is provided with a limiting step, and the limiting step is arranged at the A' end of the movable block and abuts against the A' end of the movable block.

[0008] In some embodiments, two clamping plates are respectively disposed on both sides of the output end of the linear actuator.

[0009] In some embodiments, a reset elastic member is provided between the movable seat and the mounting seat, and the elastic force of the reset elastic member is in direction A.

[0010] In some embodiments, the collapse assembly includes a stopper, and the A′ side of the stopper abuts against the A side of the movable block.

[0011] In some embodiments, the mounting seat is provided with a movable groove, and the movable seat slides in a limited manner in the movable groove.

[0012] In some embodiments, a limit block is provided on the other side of the movable block, and the movable block moves in the AA' direction along the side wall of the limit block. One end of the locking elastic member is connected to the A' end of the clamping sheet, and the other end is connected to the movable block.

[0013] In some embodiments, the side wall of the movable block matches the shape of the corresponding side wall of the limiting block.

[0014] In some embodiments, the mounting seat is provided with a fixing plate, and the collapse assembly is arranged on the fixing plate.

[0015] The beneficial effects of the present invention are:

[0016] The seat collapse structure improves the maximum energy absorption capacity of the collapse component as a whole by setting the position and connection relationship between the special clamping plate, the locking elastic part and the linear driver. When subjected to a large impact force, the collapse component can buffer the impact force, and the linear driver retracts with the movable seat to avoid instantaneous impact force crushing the internal structure of the linear driver. Moreover, the collapse component can still be restored after the external force is removed, and no replacement is required, thereby improving the overall practicality of the collapse structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of Example 1;

[0018] Figure 2 This is a schematic diagram of the connection structure between the collapse assembly and the movable block after the stopper piece is hidden in Example 1;

[0019] Figure 3 It is a schematic diagram of the connection structure of the collapse assembly and the movable block of Example 1;

[0020] Figure 4 Schematic diagram of the force on the output end of the linear actuator of Example 1;

[0021] Figure 5 is a schematic diagram of a collapse assembly of Example 2;

[0022] The numbers and names in the figure correspond to each other as follows: 1. Linear drive; 2. Mounting assembly; 3. Collapse assembly; 11. Movable block; 21. Mounting seat; 22. Movable seat; 23. Movable groove; 24. Fixed plate; 25. Reset elastic member; 31. Clamping plate; 32. Locking elastic member; 33. Limiting step; 34. Stop plate; 35. Limiting block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention provides two technical solutions:

[0025] Example 1

[0026] A collapse structure for a seat, see Figure 1 , including a linear drive 1, a mounting component 2 and a collapse component 3, wherein the linear drive 1 and the collapse component 3 are arranged on the mounting component 2.

[0027] The mounting assembly 2 includes a mounting seat 21 and a movable seat 22. The mounting seat 21 is provided with a movable groove 23 and a fixed plate 24. The movable seat 22 slides in the movable groove 23 and in the AA' direction. The movable groove 23 can limit the moving path and moving range of the movable seat 22. The linear drive 1 is arranged on the movable seat 22, and the collapse assembly 3 is arranged on the fixed plate 24.

[0028] The fixed end of the linear drive 1 is fixedly connected to the movable seat 22 , and the output end is fixedly provided with a movable block 11 .

[0029] See also Figure 2The collapse assembly 3 includes a clamping piece 31 and a locking elastic member 32. The locking elastic member 32 of the present embodiment is a spring. The A end of the clamping piece 31 is rotated in the upper limit position on the fixed plate 24 through the fixed shaft, and the A' end is connected to one end of the locking elastic member 32 through the hanging point shaft. The preload force of the locking elastic member 32 is toward the output end of the linear drive 1. When the output end of the linear drive 1 moves toward the A' direction, the clamping piece 31, the locking elastic member 32 and the output end position of the linear drive 1 form a triangular relationship, and the angle between the clamping piece 31 and the locking elastic member 32 gradually decreases. The two clamping pieces 31 are respectively arranged on both sides of the movable block 11, and the two clamping pieces 31 are distributed in an "eight" shape. The side walls of the clamping pieces 31 abut against the side walls of the movable block 11. The side walls of the clamping pieces 31 are provided with a limiting step 33. The limiting step 33 is arranged at the A' end of the movable block 11 and abuts against the A' end of the movable block 11. During the movement of the output end of the linear actuator 1 toward A', the two clamping pieces 31 are squeezed apart by the movable block 11, and the distance between the A' ends of the two clamping pieces 31 is pulled away. The clamping pieces 31 always maintain an abutting relationship with the movable block 11, and the pulling force of the locking elastic piece 32 still remains toward the output end of the linear actuator 1. The locking elastic piece 32 always applies a pulling force to the A' end of the clamping piece 31 to resist the movement away from the movable block 11.

[0030] The external movable part is connected to the movable seat 22. When the linear drive 1 drives the movable seat 22 to move in the AA' direction on the mounting seat 21, the external movable part moves accordingly. Since the driving force of the linear drive 1 is much smaller than the pre-tightening force of the locking elastic member 32, when the linear drive 1 is working, the movable block 11 does not move, and the fixed end of the linear drive 1 drives the movable seat 22 to move in the AA' direction.

[0031] In order to realize the reset of the movable seat 22, a reset elastic member 25 is provided between the A' end of the movable seat 22 and the movable groove 23. The reset elastic member 25 in this embodiment is a spring sheet. When the reset elastic member 25 is squeezed, the elastic force of the reset elastic member 25 is directed toward the A direction.

[0032] Working principle of this embodiment: Please refer to Figure 3 and Figure 4Under normal conditions, the movable block 11 maintains a positional relationship with the clamping piece 31. Since the output end of the linear drive 1 does not move, when the linear drive 1 is working, the fixed end of the linear drive 1 drives the movable seat 22 to move at the upper limit of the mounting seat 21. When the external movable part is impacted by an external force, the movable seat 22 moves in the A' direction due to the internal locking of the linear drive 1. The movable block 11 follows the movement in the A' direction. The two clamping pieces 31 are squeezed apart by the movable block 11, and the tension of the locking elastic member 32 is still maintained in the direction of the output end of the linear drive 1, thereby achieving the overall collapse of the linear drive 1 and the clamping piece 31. The combination of 31 and the locking elastic member 32 buffers the impact caused by the external force, and avoids the damage to the internal structure of the linear actuator 1 caused by the instantaneous impact of the external force. According to this situation, the distance between the central axis of the single clamping piece 31A end and the central axis of the locking elastic member 32 is set to L1 in the original position, and the vertical line between the central axis of the clamping piece 31A end and the central point of the abutment surface between the movable block 11 and the limiting step 33 is L2, the tension of the locking elastic member 32 is F1, and the maximum crushing force borne by the output end of the linear actuator 1 is F2. Since the present embodiment involves two clamping pieces 31, it can be obtained through the position relationship and the lever principle:

[0033] F2 = 2*F1*(L1 / L2);

[0034] Therefore, the maximum crushing force borne by the output end of the linear actuator 1 in this embodiment is not simply equal to the elastic force of the locking elastic member 32, but is the product of the elastic force of the locking elastic member 32 and L1 / L2, and the maximum crushing force can be increased to 2 times by providing a locking elastic member 32 in combination with two clamping pieces 31, which greatly improves the energy absorption capacity of the collapse assembly 3. The combination of the clamping piece 31 and the locking elastic member 32 buffers the impact caused by the external force and can prevent the human body from being hit by a secondary impact.

[0035] When the external force is removed, the resetting elastic member 25 drives the movable seat 22 to return to the direction A, and the movable block 11, the clamping piece 31 and the locking elastic member 32 return to their original positions or states.

[0036] In order to further limit the excessive movement of the movable block 11 toward direction A, in this embodiment, preferably, the collapse assembly 3 includes a stopper 34. In the original position, the A' side of the stopper 34 abuts against the A side of the movable block 11, and the stopper 34 is connected to the fixed plate 24 via a fixed shaft.

[0037] Example 2

[0038] The difference between this embodiment and embodiment 1 is that this embodiment only provides a clamping piece that abuts against the movable block, and eliminates the limit piece. Figure 5The clamping sheet is arranged on one side of the movable block, and a limit block is arranged on the other side of the movable block. The limit block is fixedly connected to the fixed plate, and the movable block moves in the AA' direction along the side wall of the limit block. The side wall of the movable block and the corresponding side wall of the limit block match in shape, and the limit block limits the movable range of the movable block in the AA' direction. One end of the locking elastic member is connected to the A' end of the clamping sheet, and the other end is connected to the movable block. One end of the movable block is fixedly connected to the locking elastic member or slides in the limit position of the locking elastic member, which is implemented according to the specific situation.

[0039] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A collapse structure for a seat, comprising a linear drive (1), a mounting assembly (2) and a collapse assembly (3), characterized in that: The mounting assembly (2) comprises a mounting seat (21) and a movable seat (22), wherein the movable seat (22) is in the mounting seat (21) and slides in the upper limit direction AA', and the collapse assembly (3) comprises a clamping plate (31) and a locking elastic member (32), wherein the A end of the clamping plate (31) rotates in the upper limit direction of the mounting seat (21), and the A' end is connected to one end of the locking elastic member (32), and the pre-tightening force of the locking elastic member (32) is directed toward the output end of the linear drive (1), and the fixed end of the linear drive (1) is fixedly connected to the movable seat (22), and the output end is in contact with the clamping plate (31), and when the output end of the linear drive (1) moves toward the A' direction, the angle between the clamping plate (31) and the locking elastic member (32) becomes smaller.

2. A seat collapse structure according to claim 1, characterized in that: The single clamping sheet (31), the locking elastic member (32) and the output end position of the linear drive (1) form a triangular relationship.

3. The seat collapse structure according to claim 1, characterized in that: A movable block (11) is fixedly provided at the output end of the linear drive (1), a side wall of the clamping sheet (31) abuts against the side wall of the movable block (11), a limiting step (33) is provided on the side wall of the clamping sheet (31), and the limiting step (33) is arranged at the A' end of the movable block (11) and abuts against the A' end of the movable block (11).

4. The seat collapse structure according to claim 1, characterized in that: The two clamping sheets (31) are respectively arranged on both sides of the output end of the linear drive (1).

5. The seat collapse structure according to claim 1, characterized in that: A resetting elastic member (25) is provided between the movable seat (22) and the mounting seat (21), and the elastic force of the resetting elastic member (25) is directed in direction A.

6. The seat collapse structure according to claim 1, characterized in that: The collapse assembly (3) comprises a stopper piece (34), and the A' side of the stopper piece (34) abuts against the A side of the movable block (11).

7. The seat collapse structure according to claim 1, characterized in that: The mounting seat (21) is provided with a movable groove (23), and the movable seat (22) slides in a limited position in the movable groove (23).

8. The seat collapse structure according to claim 3, characterized in that: A limit block (35) is provided on the other side of the movable block (11); the movable block (11) moves in the AA' direction along the side wall of the limit block (35); one end of the locking elastic member (32) is connected to the A' end of the clamping sheet (31), and the other end is connected to the movable block (11).

9. The seat collapse structure according to claim 8, characterized in that: The side wall of the movable block (11) and the corresponding side wall of the limiting block (35) match in shape.

10. The seat collapse structure according to claim 1, characterized in that: The mounting seat (21) is provided with a fixing plate (24), and the collapse assembly (3) is arranged on the fixing plate (24).

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