Seat side edge anti-collision device

Through the cooperation of cushioning and self-locking mechanisms, the problem of environmental changes or collapse of child safety seats after impact is solved, and the effect of slowing impact damage and maintaining seat stability is achieved.

CN223266665UActive Publication Date: 2025-08-26NINGBO WELLDON INFANT & CHILD SAFETY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202422574616.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-23
Publication Date
2025-08-26
Estimated Expiration
2034-10-23

AI Technical Summary

Technical Problem

The anti-collision device of existing child safety seats may cause changes or collapse in the environment after the seat is impacted and cause secondary damage.

Method used

The buffering mechanism and a self-locking mechanism are adopted. The buffering mechanism cooperates with the elastic member through the coupling of the buffering member. The buffering member slowly moves after being impacted and the elastic member is deformed. The self-locking mechanism limits the relative position of the buffering member and the mounting member at a specific position to prevent rebound and secondary changes in the environment.

Benefits of technology

Effectively slow down the damage to the seat by external impact, prevent the seat side anti-collision device from elastically counterattacking the external impact object, maintain the environmental stability of the seat after being impacted, and increase the safety of the user.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a seat side edge anti-collision device which comprises a buffering mechanism and a self-locking mechanism, and the buffering mechanism is connected with the self-locking mechanism. The buffering mechanism comprises a mounting piece and a buffering piece, a first sliding groove is formed in the mounting piece, a first sliding block is arranged on the buffering piece, the first sliding block is matched with the first sliding groove, an elastic piece is arranged in the mounting piece, and the elastic piece is further connected with the buffering piece; the self-locking mechanism is connected with the buffering mechanism, so that after the buffering piece of the buffering mechanism extrudes the elastic piece, the self-locking mechanism limits the position of the buffering piece. The automobile seat has the effects that the environmental stability after the seat is impacted is improved, and the use safety of a user is improved.
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Description

Technical Field

[0001] The present application relates to the field of child safety seat technology, and in particular to a seat side impact protection device. Background Art

[0002] Child safety seats are usually fixedly installed on car seats, and the safety of children in the car is ensured through various safety designs on the child safety seats.

[0003] Although the child safety seats in the prior art are equipped with anti-collision devices, the anti-collision devices in the prior art can not only reduce the impact damage of external impact objects on the seat, but also rebound the external impact objects. The rebound of external impact objects may cause the environment of the seat to change or collapse after the impact, thereby causing secondary damage to the seat, thereby making it possible for the person in the seat to suffer secondary trauma.

[0004] In summary, the rebound of the impacting object in the seat anti-collision device in the prior art may cause secondary damage to the seat, thereby affecting the user in the seat, so there is room for further improvement. Utility Model Content

[0005] In view of this, the present application provides a seat side collision protection device, which can reduce the impact of external impact on the seat after the seat is hit by an external impact, and the seat will not push the external impact object to cause changes in the impact environment or collapse. In this way, the seat side collision protection device can increase the practical safety of the user.

[0006] In order to improve the environmental stability of the seat after being impacted and increase the safety of the user, the present application provides a seat side anti-collision device.

[0007] The present application provides a seat side impact protection device that adopts the following technical solution:

[0008] A seat side anti-collision device includes a buffer mechanism and a self-locking mechanism, and the buffer mechanism is connected to the self-locking mechanism; the buffer mechanism includes a mounting part and a buffer part, the mounting part is provided with a first slide groove, the buffer part is provided with a first slider, the first slider cooperates with the first slide groove, an elastic part is provided in the mounting part, and the elastic part is also connected to the buffer part; the self-locking mechanism is connected to the buffer mechanism, so that after the buffer part of the buffer mechanism squeezes the elastic part, the self-locking mechanism limits the position of the buffer part.

[0009] By adopting the above technical solution, when an external impact object hits the side of the seat, the buffer of the buffer mechanism will be squeezed by the external impact object and will slowly move toward the mounting part. In the process of moving toward the mounting part, the buffer will squeeze the elastic part located between the buffer and the mounting part. The elastic part will be squeezed and slowly deformed, thereby slowly blocking the damage to the seat caused by the external impact object. When the elastic part is deformed to a certain extent, the buffer also moves to a certain position on the mounting part. At this time, the self-locking mechanism limits the relative position of the buffer and the mounting part, thereby achieving that after the seat side anti-collision device is hit, it can not only slow down or block the damage to the seat caused by the external impact object, but also limit the elastic counterattack of the seat side anti-collision device to the external impact object, thereby preventing secondary changes or secondary collapses in the environment after the impact occurs, thereby improving the environmental stability of the seat after the impact, thereby increasing the safety of the user.

[0010] Preferably, the self-locking mechanism includes a self-locking component, and the self-locking component includes a lock receiving part and a lock head. The lock receiving part is provided with a countersunk hole, and a first spring is provided in the countersunk hole. The lock head is connected to the first spring; the mounting part is provided with a mounting groove for the lock head to pass through, and the buffer part is also provided with a buffer hole for the lock head to pass through.

[0011] By adopting the above technical solution, after the buffer part is hit by an external impact object, the buffer part will move and squeeze the elastic part in the mounting part, so that when the relative position between the buffer part and the mounting part is at a certain point, the lock head of the self-locking assembly will pass through the mounting groove of the mounting part and the buffer hole of the buffer part, thereby realizing the limitation of the relative position of the buffer part and the mounting part, so as to ensure that the environment of the seat will not undergo secondary changes or collapse after the seat is hit, thereby increasing the environmental stability of the seat after the impact and increasing the safety of the user.

[0012] Preferably, the self-locking mechanism also includes a reset component, the reset component includes a reset button, a button groove is provided on the mounting member, a second spring is provided in the button groove, one end of the second spring is connected to the reset button, a second protrusion is provided at one end of the reset button near the second spring, and a third protrusion is provided at one end of the lock head near the reset button, the second protrusion cooperates with the third protrusion, so that the reset button squeezes the third protrusion through the second protrusion and then squeezes the lock head back into the lock receiving member.

[0013] By adopting the above technical solution, after the self-locking component locks the relative position of the mounting part and the buffer part, in order to unlock the fixed relative position of the mounting part and the buffer part, the user presses the reset button, and the second protrusion on the reset button squeezes the third protrusion on the lock head, so that the lock head is squeezed in the direction of pressing back into the lock storage groove until the lock head is squeezed back into the lock storage groove. At this time, since the external impact object or external squeezing object has been cleared, the first spring will drive the buffer part to return to the initial position of the island, and then the mounting groove and the buffer hole are not at the same point, so that the lock head cannot limit the relative position of the buffer part and the mounting part, so the seat side anti-collision device returns to the initial position.

[0014] Preferably, the self-locking component and the reset component are arranged perpendicular to each other.

[0015] By adopting the above technical solution, not only the distribution of the positions of the self-locking component and the reset component is facilitated, but also the reset button applies force to the lock head to squeeze the lock head, thereby making it convenient to retract the lock head into the lock storage slot.

[0016] Preferably, the self-locking component is connected to the buffer member so that the self-locking component moves along with the movement of the buffer member.

[0017] By adopting the above technical solution, the self-locking component is located on the buffer and the reset component is located on the mounting component. When the buffer and the mounting component are located at a certain point, the self-locking component passes through and limits the relative position of the buffer and the mounting component. After the user presses the reset component, the reset button squeezes the self-locking component back into the buffer, and the buffer and the mounting component are unlocked. Under the action of the elastic component, the buffer returns to the position before being hit by an external impact object.

[0018] Preferably, the lock head is provided with a second slider, the lock receiving member is provided with a second sliding groove, and the second slider cooperates with the second sliding groove.

[0019] By adopting the above technical solution, the lock head can move restrictively along the direction of the second sliding groove in the lock receiving member, so that when the reset button squeezes the lock head, the position of the lock head is fixed, which facilitates the accuracy of the reset assembly squeezing the lock head.

[0020] Preferably, the mounting member includes a seat side panel and a mounting ring, the mounting ring includes a ring plate and an arc plate, the ring plate and the seat side panel are arranged perpendicular to each other, the ring plate is connected to the arc plate, and the arc plate makes the transition between the ring plate and the seat side panel smooth.

[0021] By adopting the above technical solution, the mounting parts are divided into seat side panels and mounting rings, which facilitates the production and demolding of the mounting parts. The ring plate of the mounting ring facilitates the installation and disassembly of the sliding connection with the buffer part. The arc plate of the mounting ring makes the transition between the ring plate and the seat side panel smooth, and the arc plate can also enhance the strength of the ring plate, so that the mounting ring has a stronger supporting ability when facing external impact.

[0022] Preferably, the seat side panel includes a first side panel and a second side panel, the first side panel and the second side panel are arranged in parallel, the mounting ring is arranged on the first side panel, one end of the elastic member is connected to the second side panel, and the other end is connected to the buffer member.

[0023] By adopting the above technical solution, the first side panel and the second side panel themselves are also necessary supporting shells for the seat. By making full use of the gap between the first side panel and the second side panel by setting the mounting ring, the buffer component and the elastic component, the strength of the seat support mounting ring is enhanced, and the space between the first side panel and the second side panel is also convenient for the setting of the spring.

[0024] Preferably, the self-locking mechanism also includes a reset component, which includes a reset mounting piece and a reset button. The reset mounting piece is connected to the mounting ring, a button through hole is provided on the reset mounting piece, a second spring is provided in the button through hole, one end of the second spring is connected to the seat side panel, and the other end is connected to the reset button, a second protrusion is provided at one end of the reset button near the second spring, and a third protrusion is provided at one end of the lock head near the reset button, the second protrusion cooperates with the third protrusion so that the reset spring squeezes the lock head back into the lock receiving piece.

[0025] By adopting the above technical solution and separating the reset mounting member from the mounting ring, the production and demoulding of the seat side anti-collision device are facilitated, as is the installation and removal of the reset assembly and the mounting ring.

[0026] Preferably, a seat frame is further included, a frame groove is provided on the buffer mechanism, and the seat frame is connected to the frame groove.

[0027] By adopting the above technical solution, the seat frame partially supports the buffer mechanism, thereby enhancing the strength of the buffer mechanism.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. When an external impactor hits the side of the seat, the buffer member of the buffer mechanism is squeezed by the external impactor and slowly moves toward the mounting member. In the process of moving toward the mounting member, the buffer member squeezes the elastic member located between the buffer member and the mounting member. The elastic member is squeezed and slowly deforms, thereby slowly preventing the external impactor from damaging the seat. When the elastic member deforms to a certain extent, the buffer member also moves to a certain position on the mounting member. At this time, the self-locking mechanism limits the relative position of the buffer member and the mounting member, thereby achieving the goal that the seat side impact protection device can not only slow down or prevent the damage to the seat caused by the external impactor after being hit, but also limit the elastic counterattack of the seat side impact protection device against the external impactor, thereby preventing secondary changes or secondary collapse of the environment after the impact occurs. In this way, the environmental stability of the seat after the impact is improved, thereby increasing the safety of the user.

[0030] 2. When the cushioning member is struck by an external impactor, it moves within the mounting member to compress the elastic member. When the relative position between the cushioning member and the mounting member is at a certain point, the locking head of the self-locking assembly passes through the mounting groove and the buffer hole of the mounting member, thereby limiting the relative position of the cushioning member and the mounting member. This prevents the seat from undergoing secondary changes or collapse after the impact, thereby increasing the seat's environmental stability after the impact and enhancing user safety.

[0031] 3. After the self-locking assembly locks the relative position of the mounting part and the buffer part, in order to unlock the fixed relative position of the mounting part and the buffer part, the user presses the reset button. The second protrusion on the reset button squeezes the third protrusion on the lock head, so that the lock head is squeezed in the direction of pressing back into the lock storage groove until the lock head is squeezed back into the lock storage groove. At this time, since the external impact object or external extrusion object has been cleared, the first spring will drive the buffer part to return to the initial position of the island, so that the mounting groove and the buffer hole are not at the same point, so that the lock head cannot limit the relative position of the buffer part and the mounting part, so the seat side anti-collision device returns to the initial position. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the structure of the seat side anti-collision device in this embodiment;

[0033] Figure 2 This is a partial structural diagram of the seat side anti-collision device in this embodiment;

[0034] Figure 3 This is a partial structural diagram of the seat side anti-collision device in this embodiment;

[0035] Figure 4 2 is a cross-sectional view of the seat side anti-collision device in this embodiment.

[0036] Figure markings: 1. Buffer mechanism; 2. Self-locking mechanism; 3. Mounting part; 4. Buffer member; 5. First slide groove; 6. First slider; 7. Elastic member; 8. Self-locking assembly; 9. Lock storage member; 10. Lock head; 11. First spring; 12. Mounting groove; 13. Buffer hole; 14. Reset assembly; 15. Reset button; 16. Second spring; 17. Second protrusion; 18. Third protrusion; 19. Second slider; 20. Second slide groove; 21. Seat side panel; 22. Mounting ring; 23. Ring plate; 24. Arc plate; 25. First side panel; 26. Second side panel; 27. Reset mounting member; 28. Button through hole; 29. ​​Seat frame; 30. Frame groove. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-4 This application is described in further detail.

[0038] An embodiment of the present application discloses a seat side collision protection device.

[0039] Reference Figure 1 and Figure 4 , including a buffer mechanism 1 and a self-locking mechanism 2, and the buffer mechanism 1 is connected to the self-locking mechanism 2.

[0040] The buffer mechanism 1 includes a mounting member 3 and a buffer member 4. The mounting member 3 includes a seat side panel 21 and a mounting ring 22. By separating the seat side panel 21 and the mounting ring 22, not only the production and demoulding of the mounting member 3 are facilitated, but also the ring plate 23 of the mounting ring 22 is convenient for installation and disassembly that is slidably connected to the buffer member 4. The seat side panel 21 includes a first side panel 25 and a second side panel 26. The mounting ring 22 includes a ring plate 23 and an arc plate 24. The first side panel 25 and the second side panel 26 are arranged relatively parallel to each other, so that there is a gap between the first side panel 25 and the second side panel 26. The ring plate 23 is vertically arranged on the first side panel 25. One end of the arc plate 24 is integrally formed with one end of the ring plate 23, and the other end has a surface gap with the first side panel 25. The arc plate 24 makes the transition between the ring plate 23 and the seat side plate 21 smooth, and the arc plate 24 can also strengthen the strength of the ring plate 23, so that the mounting ring 22 has a strong supporting ability when facing external impact. The ring plate 23 of the mounting ring 22 is provided with a first slide groove 5 in the plate wall along the axial direction. One end of the buffer 4 is arc-shaped and the other end is provided with a countersunk hole. The buffer 4 is inserted into the ring plate 23 of the mounting ring 22, and the outer wall of the buffer 4 is integrally formed with a first slider 6. The first slider 6 is located in the first slide groove 5, so that the buffer 4 can slide in the mounting ring 22 along the axial direction of the mounting ring 22, and the inner end of the buffer 4 is connected to the elastic member 7, and the other end of the elastic member 7 is connected to the second side plate 26.

[0041] The self-locking mechanism 2 includes a self-locking component 8, which includes a lock receiving part 9 and a lock head 10. The lock receiving part 9 and the buffer part 4 are integrally formed. The lock receiving part 9 is provided with a countersunk hole at a position near the mounting ring 22. The inner end of the countersunk hole is connected to a first spring 11. The lock head 10 is connected to the other end of the first spring 11. The position of the buffer part 4 near the countersunk hole of the lock receiving part 9 is called a buffer hole 13. The mounting ring 22 is provided with a mounting groove 12. When an external impact object hits the side of the seat, the buffer part 4 of the buffer mechanism 1 is squeezed by the external impact object and will slowly move toward the mounting part 3. In the process of moving toward the mounting part 3, the buffer part 4 will squeeze the position between the buffer part 4 and the mounting part 3. The elastic member 7 between the mounting members 3 is squeezed and slowly deformed, thereby slowly blocking the damage to the seat caused by external impact objects. When the elastic member 7 is deformed to a certain extent, the buffer member 4 also moves to a certain position on the mounting member 3, so that when the relative position between the buffer member 4 and the mounting member 3 is at a certain point, the lock head 10 of the self-locking assembly 8 will pass through the mounting groove 12 of the mounting member 3 and the buffer hole 13 of the buffer member 4, thereby realizing the limitation of the relative position of the buffer member 4 and the mounting member 3, so as to ensure that the environment of the seat will not undergo secondary changes or collapse after the seat is hit, thereby increasing the environmental stability of the seat after the impact and increasing the safety of the user.

[0042] Furthermore, in this embodiment, a second slide groove 20 is provided on the lock receiving member 9, and a second slider 19 is integrally formed on the side wall of the lock head 10. The second slider 19 is located in the second slide groove 20, so that the lock head 10 can move restrictively along the direction of the second slide groove 20 in the lock receiving member 9, thereby fixing the position of the lock head 10 and allowing it to accurately pass through the mounting groove 12 of the mounting member 3 and the buffer hole 13 of the buffer member 4.

[0043] Furthermore, in this embodiment, the self-locking mechanism 2 also includes a reset component 14, and the reset button 15 is arranged perpendicular to the self-locking component 8, so that the positions of the self-locking component 8 and the reset component 14 are conveniently distributed, so that the reset button 15 can apply force to the lock head 10 to squeeze the lock head 10, thereby making it convenient to retract the lock head 10 into the lock storage slot. The reset component 14 includes a reset button 15 and a reset mounting member 27, and the reset mounting member 27 is plugged into the mounting ring 22. A button through hole 28 is provided on the reset mounting member 27, and the button through hole 28 is provided with the reset button 15. The upper side of one end of the reset button 15 is integrally formed with a second protrusion 17, so that the second protrusion 17 allows the reset button 15 to only pass through one end of the button through hole 28, and the straight line of the upper end of the second protrusion 17 The diameter is smaller than the diameter of the lower end of the second protrusion 17. The reset button 15 is connected to the second spring 16 at one end near the second through hole. The other end of the second spring 16 is connected to the second side plate 26. The upper diameter of the lock head 10 of the self-locking assembly 8 is larger than the diameter of the lower part of the lock head 10, so that the user presses the reset button 15, and the second protrusion 17 on the reset button 15 squeezes the third protrusion 18 on the lock head 10, so that the lock head 10 is squeezed in the direction of being pressed back into the lock receiving groove until the lock head 10 is squeezed back into the lock receiving groove. The first spring 11 will drive the buffer member 4 to return to the initial position, thereby making the mounting groove 12 and the buffer hole 13 not at the same point, so that the lock head 10 cannot limit the relative position of the buffer member 4 and the mounting member 3, so the buffer mechanism 1 returns to the initial position.

[0044] Furthermore, in this embodiment, a seat frame 29 is also included. A frame groove 30 is provided on the side wall of the mounting member 3 and the side wall of the buffer member 4. One end of the seat frame 29 is inserted and bolted into the frame groove 30. The seat frame 29 partially supports the buffer mechanism 1 to enhance the strength of the buffer mechanism 1.

[0045] Furthermore, in this embodiment, the present invention has no special restrictions on the specific structure of the mounting member 3, as long as it can realize the function of limiting the sliding of the buffer member 4 and facilitate the connection between the buffer member 4 and the elastic member 7 as is well known to those skilled in the art. Those skilled in the art can select and adjust according to the specific application conditions and product requirements.

[0046] Furthermore, in this embodiment, the present invention has no special restrictions on the installation position of the self-locking component 8, and it is sufficient to achieve the function of limiting the relative position of the buffer part 4 and the mounting part 3 that is well known to those skilled in the art. Those skilled in the art can select and adjust according to the specific application conditions and product requirements.

[0047] Furthermore, the present invention has no special restrictions on the elastic member 7, and it can achieve the elastic deformation function well known to those skilled in the art to reduce the impact of external impact objects on the side anti-collision device of the seat. Those skilled in the art can select and adjust it according to the specific application and product requirements; the elastic member 7 of the present invention is preferably a spring, and more preferably an elastic airbag.

[0048] Furthermore, in this embodiment, the self-locking mechanism 2 can also be well known to those skilled in the art and can limit the position of the buffer 4.

[0049] It should be noted that the technical solutions in the embodiments of the present application can be arbitrarily combined into new embodiments if they do not conflict with each other and the technical solutions can coexist.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A seat side impact protection device, characterized by: It comprises a buffer mechanism (1) and a self-locking mechanism (2), wherein the buffer mechanism (1) is connected to the self-locking mechanism (2); The buffer mechanism (1) comprises a mounting member (3) and a buffer member (4); the mounting member (3) is provided with a first slide groove (5); the buffer member (4) is provided with a first slider (6); the first slider (6) cooperates with the first slide groove (5); an elastic member (7) is provided in the mounting member (3); and the elastic member (7) is also connected to the buffer member (4); The self-locking mechanism (2) is connected to the buffer mechanism (1), so that after the buffer member (4) of the buffer mechanism (1) squeezes the elastic member (7), the self-locking mechanism (2) limits the position of the buffer member (4).

2. The seat side impact protection device according to claim 1, characterized in that: The self-locking mechanism (2) includes a self-locking component (8), and the self-locking component (8) includes a lock receiving member (9) and a lock head (10). The lock receiving member (9) is provided with a countersunk hole, a first spring (11) is provided in the countersunk hole, and the lock head (10) is connected to the first spring (11); the mounting member (3) is provided with a mounting groove (12) for the lock head (10) to pass through, and the buffer member (4) is also provided with a buffer hole (13) for the lock head (10) to pass through.

3. The seat side impact protection device according to claim 2, characterized in that: The self-locking mechanism (2) further comprises a reset assembly (14), the reset assembly (14) comprising a reset button (15), a button groove being provided on the mounting member (3), a second spring (16) being provided in the button groove, one end of the second spring (16) being connected to the reset button (15), a second protrusion (17) being provided at one end of the reset button (15) near the second spring (16), a third protrusion (18) being provided at one end of the lock head (10) near the reset button (15), the second protrusion (17) cooperating with the third protrusion (18) so that the reset button (15) squeezes the third protrusion (18) through the second protrusion (17) and thereby squeezes the lock head (10) back into the lock receiving member (9).

4. The seat side impact protection device according to claim 3, characterized in that: The self-locking component (8) and the reset component (14) are arranged perpendicular to each other.

5. The seat side impact protection device according to claim 2, characterized in that: The self-locking component (8) is connected to the buffer component (4) so ​​that the self-locking component (8) moves along with the movement of the buffer component (4).

6. The seat side impact protection device according to claim 2, characterized in that: The lock head (10) is provided with a second slide block (19), the lock receiving member (9) is provided with a second slide groove (20), and the second slide block (19) is matched with the second slide groove (20).

7. The seat side impact protection device according to claim 2, characterized in that: The mounting member (3) comprises a seat side panel (21) and a mounting ring (22); the mounting ring (22) comprises a ring plate (23) and an arc plate (24); the ring plate (23) and the seat side panel (21) are arranged perpendicular to each other; the ring plate (23) is connected to the arc plate (24); and the arc plate (24) ensures a smooth transition between the ring plate (23) and the seat side panel (21).

8. The seat side impact protection device according to claim 7, characterized in that: The seat side panel (21) comprises a first side panel (25) and a second side panel (26), wherein the first side panel (25) and the second side panel (26) are arranged in parallel, the mounting ring (22) is arranged on the first side panel (25), and one end of the elastic member (7) is connected to the second side panel (26), and the other end is connected to the buffer member (4).

9. The seat side impact protection device according to claim 7, characterized in that: The self-locking mechanism (2) also includes a reset assembly (14), the reset assembly (14) includes a reset mounting member (27) and a reset button (15), the reset mounting member (27) is connected to the mounting ring (22), a button through hole (28) is provided on the reset mounting member (27), a second spring (16) is provided in the button through hole (28), one end of the second spring (16) is connected to the seat side plate (21), and the other end is connected to the reset button (15), a second protrusion (17) is provided at one end of the reset button (15) near the second spring (16), a third protrusion (18) is provided at one end of the lock head (10) near the reset button (15), the second protrusion (17) cooperates with the third protrusion (18), so that the reset spring squeezes the lock head (10) back into the lock receiving member (9).

10. The seat side impact protection device according to claim 1, characterized in that: It also includes a seat frame (29), a frame groove (30) is provided on the buffer mechanism (1), and the seat frame (29) is connected to the frame groove (30).