Safety belt upper fixing point guide structure, seat backrest assembly, seat and vehicle

Abstract

The utility model relates to the technical field of automobile parts, in particular to a safety belt upper fixing point guide structure, a seat backrest assembly, a seat and a vehicle, and aims to solve the problem that the neck of a passenger is easily cut by an existing safety belt structure. In order to achieve the purpose, the fixing point guiding structure on the safety belt comprises a bottom plate, a limiting support, a reset elastic piece and a guiding piece, wherein the limiting support, the reset elastic piece and the guiding piece are sequentially fixed to the bottom plate through bolts. The limiting support comprises a support body, a first limiting part and a second limiting part, the first limiting part and the second limiting part extend from the support body to the two sides of the support body, the first limiting part is limited by the bottom plate, and the second limiting part abuts against a protruding part arranged at the bottom of the guiding piece. A guide groove is formed in the top of the guide piece and can drive the guide piece to rotate under the action of external force. The two ends of the reset elastic piece are connected with the second limiting part and the guiding piece correspondingly, and the reset elastic piece is used for applying restoring force to the guiding piece. The guiding structure eliminates the risk that a safety belt braid cuts the neck of a passenger when the vehicle collides.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a seat belt fixing point guide structure, a seat back assembly, a seat, and a vehicle. Background Technology

[0002] Currently, in existing vehicles, the seat belts for the second-row independent seats are gradually integrating the traditional upper anchor points, which were located on the B / C pillars of the vehicle body, into the seat back frame to address the comfort issue of occupants wearing seat belts in scenarios with large backrest angles. However, this approach still carries two risks: First, the position of the seat belt upper anchor point is very close to the occupant's neck, making it easy for the seat belt webbing to cut the occupant's neck when the seat back is at a large angle. Second, even if the position of the upper anchor point is changed by adding an adjustment device, it is still insufficient to eliminate the risk that the seat belt webbing will move even closer to the occupant's neck in a collision scenario, still posing a risk of cutting the occupant's neck.

[0003] To address the above issues, several solutions have been developed to further improve the seatbelt structure: one is to extend the seatbelt outwards using mounting brackets and guide rings, moving it away from the center of the passenger compartment and increasing occupant comfort; the other is to design a seat mechanism with an adjustable seatbelt anchor point height, which improves seat comfort and reduces space constraints in the vehicle's seating layout. However, while these two solutions mitigate the first risk to some extent, they do not resolve the risk of the seatbelt cutting the occupant's neck during a collision, as seen in the second scenario.

[0004] Therefore, how to solve the problem of not causing neck-cutting complaints when wearing the seat belt, while also ensuring that the seat belt will not cut the occupant's neck in a collision scenario, has become a complex problem. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem that the existing seat belt structure is prone to cutting the neck of the occupant in a collision.

[0006] In a first aspect, this utility model provides a seat belt fixing point guide structure, including a base plate and a limiting bracket, a reset elastic member, and a guide member that are bolted sequentially to the base plate; the limiting bracket includes a bracket body and a first limiting part and a second limiting part extending from the bracket body to both sides therefrom, the first limiting part being limited by the base plate, and the second limiting part abutting against a protrusion provided at the bottom of the guide member; a guide groove is provided at the top of the guide member, and the guide groove can drive the guide member to rotate under the action of external force; the two ends of the reset elastic member are respectively connected to the second limiting part and the guide member to apply a restoring force to the guide member.

[0007] Furthermore, the guide member has a T-shaped structure, including a horizontal part and a vertical part; the guide groove is formed on the horizontal part; the vertical part is provided with a first through hole and a second through hole, the guide member is sleeved on the bolt through the first through hole and can rotate around the bolt; the second through hole is located between the first through hole and the horizontal part, and is used to connect with one end of the reset elastic member; the protrusion is provided at the lower end of the vertical part away from the horizontal part, and the second limiting part of the limiting bracket abuts against the protrusion under the action of the reset elastic member.

[0008] Furthermore, the base plate is provided with a first threaded hole for connecting with the bolt, and the limiting bracket, the reset elastic element and the guide element are installed between the base plate and the head of the bolt; the base plate is also provided with a limiting hole for limiting the first limiting part of the limiting bracket.

[0009] Furthermore, it also includes a support sleeved on the bolt's threaded rod; the support is a stepped frustum structure, disposed between the limiting bracket and the head of the bolt; one end of the stepped frustum abuts against the bracket body of the limiting bracket; the other end abuts against the head of the bolt; the reset elastic element is sleeved on the middle stepped section of the stepped frustum; the guide element is sleeved on the top stepped section of the stepped frustum.

[0010] Furthermore, it also includes a bushing disposed in the first through hole of the guide member and fitted with the first through hole in an interference fit.

[0011] Furthermore, it also includes a locking washer, which is disposed at the connection between the bolt shank and the first threaded hole.

[0012] Furthermore, it also includes a limiting post disposed on the base plate, the limiting post being disposed on one side of the vertical part of the guide member, for limiting the range of rotation of the guide member under force.

[0013] In a second aspect, the present invention provides a seat back assembly, comprising: a seat back frame assembly; a seat belt retractor disposed on the seat back frame assembly; a seat belt anchor point guide structure as described above, disposed on the upper part of the seat back frame assembly and near the vehicle door side; a seat back foam covering the outside of the seat back frame assembly, the seat belt retractor, and the seat belt anchor point guide structure, the seat back foam having a slot; a seat back cover covering the outside of the seat back foam, the seat back cover having an opening at a position opposite to the slot; and a seat belt webbing extending from the seat belt retractor, passing through a guide groove disposed on the top of a guide member, a slot disposed on the seat back foam, and an opening disposed on the seat back cover, extending to the outside of the seat back assembly.

[0014] In a third aspect, the present invention also provides a seat, which includes the seat back assembly as described above.

[0015] In a fourth aspect, the present invention provides a vehicle that includes the seat described above.

[0016] By adopting the above technical solution, this utility model can install a seat belt anchor point guide structure on the seat back frame. In the event of a collision, the seat belt anchor point guide structure rotates outward under the external force of the seat belt webbing, thereby pushing the seat belt webbing to the outside of the seat, away from the passenger's neck. This eliminates the risk of the seat belt webbing cutting the occupant's neck during a collision. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the seat belt fixing point guide structure in the embodiments of this application;

[0019] Figure 2 This is an exploded view of the seatbelt fixing point guide structure in the embodiments of this application;

[0020] Figure 3 This is a schematic diagram of the internal structure of the seat belt fixing point guide structure in the embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the limiting bracket in the seat belt fixing point guide structure in the embodiments of this application;

[0022] Figure 5 This is a schematic diagram of the guide component in the seat belt fixing point guide structure in the embodiments of this application;

[0023] Figure 6 This is a schematic diagram of the base plate in the seat belt fixing point guide structure in the embodiments of this application;

[0024] Figure 7 This is a schematic diagram of the support structure in the seat belt fixing point guide structure in the embodiments of this application;

[0025] Figure 8 This is a schematic diagram of the seat back assembly in the embodiments of this application;

[0026] Figure 9 This is a schematic diagram of the rotation direction of the guide member and the limiting post in the seat belt fixing point guide structure in this embodiment of the application;

[0027] Figure 10 This is a schematic diagram showing the movement of the guide and seat belt webbing of the seat in the embodiment of this application during a collision.

[0028] Figure label:

[0029] 10. Seat belt fixing point guide structure; 11. Base plate; 111. First threaded hole; 112. Limiting hole; 12. Bolt; 13. Limiting bracket; 131. Bracket body; 132. First limiting part; 133. Second limiting part; 14. Reset elastic element; 15. Guide element; 151. Protrusion; 152. Guide groove; 153. Horizontal part; 154. Vertical part; 155. First through hole; 156. Second through hole; 16. Support; 161. Middle step section; 162. Top step section; 17. Bushing; 18. Locking washer; 19. Limiting post; 20. Seat back assembly; 21. Backrest frame assembly; 22. Seat belt retractor; 23. Seat belt webbing; 24. Backrest cover. Detailed Implementation

[0030] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0031] First, it should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "longitudinal," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Furthermore, it should be noted that, in the description of this utility model, 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.

[0033] like Figures 1 to 3 As shown, this application embodiment provides a seat belt fixing point guide structure 10, which includes a base plate 11 and a limiting bracket 13, a reset elastic element 14, and a guide element 15, which are sequentially fixed to the base plate 11 by bolts 12. The limiting bracket 13, the reset elastic element 14, and the guide element 15 are all sleeved on the threaded rod of the bolts 12. Through the connection between the bolts 12 and the base plate 11, the limiting bracket 13, the reset elastic element 14, and the guide element 15 are installed between the base plate 11 and the head of the bolts 12.

[0034] like Figure 4 As shown, the limiting bracket 13 includes a bracket body 131 and a first limiting portion 132 and a second limiting portion 133 extending from the bracket body 131 to both sides. The bracket body 131 has holes so that the limiting bracket 13 can be fitted onto the threaded rod of the bolt 12. Figures 1 to 5 As shown, the first limiting part 132 is limited by the base plate 11, and the second limiting part 133 abuts against the protrusion 151 provided at the bottom of the guide member 15. A guide groove 152 is provided at the top of the guide member 15, through which the seat belt passes. Under external force (e.g., when pulled by the seat belt), the guide groove 152 can drive the guide member 15 to rotate around the screw of the bolt 12. The two ends of the reset elastic member 14 are connected to the second limiting part 133 and the guide member 15, respectively. When the guide member 15 rotates around the screw of the bolt 12 under external force, the reset elastic member 14 can apply a restoring force to the guide member 15. In a specific embodiment, the reset elastic member 14 can be a torsion spring.

[0035] like Figure 2 , Figure 3 and Figure 5 As shown, the guide member 15 has a T-shaped structure, including a horizontal portion 153 and a vertical portion 154. A guide groove 152 is formed on the horizontal portion 153; the vertical portion 154 has a first through hole 155 and a second through hole 156. The guide member 15 is fitted onto the threaded rod of the bolt 12 through the first through hole 155 and can rotate around the threaded rod. The second through hole 156 is located between the first through hole 155 and the horizontal portion 153, and is used to connect to one end of the reset elastic member 14. A protrusion 151 is provided at the lower end of the vertical portion 154 away from the horizontal portion 153, and the other end of the reset elastic member 14 is connected to the second limiting portion 133 of the limiting bracket 13, so that the second limiting portion 133 of the limiting bracket 13 abuts against the protrusion 151 under the restoring force of the reset elastic member 14. The horizontal portion 153 and the vertical portion 154 of the T-shaped guide member 15 do not have to be perpendicular to each other. The angle between the horizontal portion 153 and the vertical portion 154 can be set as needed.

[0036] like Figure 1 , Figure 3 and Figure 6 As shown, the base plate 11 is provided with a first threaded hole 111 for connecting with the bolt 12, and the limiting bracket 13, the reset elastic member 14 and the guide member 15 are installed between the base plate 11 and the head of the bolt 12; the base plate 11 is also provided with a limiting hole 112, and the first limiting part 132 of the limiting bracket 13 is inserted into the limiting hole 112 to limit the first limiting part 132 of the limiting bracket 13.

[0037] Furthermore, such as Figures 1 to 3 and Figure 7As shown, the seat belt fixing point guide structure 10 in this embodiment also includes a support 16 sleeved on the screw of the bolt 12. The support 16 is a stepped frustum structure, disposed between the limiting bracket 13 and the head of the bolt 12. One end of the stepped frustum abuts against the bracket body 131 of the limiting bracket 13; the other end abuts against the head of the bolt 12. The reset elastic member 14 is sleeved on the middle stepped section 161 of the stepped frustum; the guide member 15 is disposed on the top stepped section 162 of the stepped frustum through its first through hole 155. By setting the support 16, the limiting bracket 13 can be more firmly pressed onto the base; the step between the middle stepped section 161 and the top stepped section 162 can also be used to limit the guide member 15 sleeved on the top stepped section 162 along the axial direction of the bolt 12. Furthermore, by providing the support 16, the interference of the force along the axial direction of the bolt 12 on the guide member 15 and the reset elastic member 14 can be reduced, so that the guide member 15 is not affected by other forces except the tension of the seat belt and the restoring force applied by the reset elastic member 14; and the reset elastic member 14 will not be affected by additional forces, thus preventing the restoring force applied to the guide member 15 by the limiting bracket 13 from being affected by additional forces.

[0038] Furthermore, such as Figure 3 and Figure 5 As shown, in order to reduce the friction when the guide 15 rotates around the top step 162 of the stepped frustum, a bushing 17 is provided in the first through hole 155 of the guide 15, and the bushing 17 is connected to the first through hole 155 by interference fit.

[0039] Furthermore, such as Figure 2 and Figure 3 As shown, locking washers 18 are also provided at the connection between the bolt 12 and the first threaded hole 111 to secure the bolt 12 to the base plate 11.

[0040] Furthermore, such as Figure 9 As shown, to prevent the guide member 15 from rotating too much due to excessive tension in extreme situations, a limiting post 19 is provided on the base plate 11. This limiting post 19 is located on one side of the vertical portion 154 of the guide member 15 and is used to limit the range of force applied to the guide member 15. The seatbelt fixing point guide structure 10 is typically located on the side of the seat back near the vehicle door. When a passenger sits in the seat and fastens the seatbelt, the guide member 15 is pulled away from the seat back (i.e., towards the vehicle door) by the seatbelt tension. Accordingly, the limiting post 19 is located on the side of the vertical portion 154 of the guide member 15 near the vehicle door, thereby limiting the rotation angle of the guide member 15.

[0041] like Figure 8As shown, an embodiment of this application provides a seat back assembly 20, which includes: a backrest frame assembly 21, a seat belt retractor 22, a seat belt anchor point guide structure 10 as described above, a backrest foam (not shown in the figure), a backrest cover 24, and a seat belt webbing 23. The seat belt retractor 22 is disposed on the backrest frame assembly 21, typically on the back of the backrest frame assembly 21. The seat belt anchor point guide structure 10 can be mounted on the upper part of the backrest frame assembly 21 and near the vehicle door via a base plate 11. The backrest foam covers the backrest frame assembly 21, the seat belt retractor 22, and the seat belt anchor point guide structure 10. The backrest foam has a slot for the seat belt webbing 23 to pass through the slot. The backrest cover 24 is fitted over the backrest foam. An opening is provided on the backrest cover 24 at a position opposite to the slot for the seat belt webbing 23 to pass through. The seat belt webbing 23 is led out from the seat belt retractor 22 and passes through the guide groove 152 provided on the top of the guide member 15, the slot provided on the backrest foam and the opening provided on the backrest cover 24, and extends to the outside of the seat back assembly 20.

[0042] Embodiments of this application also provide a seat, which includes the seat back assembly 20 as described above.

[0043] This application provides another vehicle, which includes the seat described above.

[0044] The seatbelt anchor point guide structure 10 in this embodiment can be installed on either the backrest frame assembly 21 of the front independent seat or the backrest frame assembly 21 of the rear independent seat. The seatbelt retractor 22 and the seatbelt anchor point guide structure 10 are installed on the backrest frame assembly 21. The seatbelt webbing 23 is pulled out from the seatbelt retractor 22, passes through the guide groove 152 on the guide member 15 of the seatbelt anchor point guide structure 10, and the backrest foam and backrest cover 24 to restrain the occupant to the seat. By installing the seatbelt anchor point guide structure 10 on the seat back, both the occupant's comfort within the normal angle range of the seat back and the occupant's comfort at large angles of the seat back can be satisfied.

[0045] Furthermore, such as Figure 1 , Figure 5 , Figure 9 and Figure 10As shown, when a vehicle collision occurs, the occupant's body leans forward due to inertia, and the seatbelt webbing 23 moves forward along with it. Simultaneously, the guide member 15 is pulled by the seatbelt webbing 23 passing through its guide groove 152, causing it to rotate away from the occupant's neck (i.e., the outer side of the seat), thereby causing the seatbelt webbing 23 passing through its guide groove 152 to move away from the occupant's neck as well. Figure 10 As shown, the seatbelt webbing 23 moves outward from the black position to the yellow position, moving it away from the passenger's neck and reducing the risk of the occupant's neck being cut by the seatbelt webbing 23. Furthermore, the frictional force between the occupant's shoulder and the seatbelt retractor 22 on the seatbelt webbing 23, along with the restoring force of the reset elastic member 14 on the guide member 15, are balanced, ensuring that the seatbelt webbing 23 does not rebound and continue to affect the occupant's comfort after moving away from the neck.

[0046] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A seatbelt fixing point guide structure (10), characterized in that, It includes a base plate (11) and a limiting bracket (13), a reset elastic element (14) and a guide element (15) that are sequentially fixed to the base plate (11) by bolts (12); The limiting bracket (13) includes a bracket body (131) and a first limiting part (132) and a second limiting part (133) extending from the bracket body (131) to both sides. The first limiting part (132) is limited by the base plate (11), and the second limiting part (133) abuts against the protrusion (151) provided at the bottom of the guide (15). The top of the guide member (15) is provided with a guide groove (152), and the guide groove (152) can drive the guide member (15) to rotate under the action of external force; The two ends of the reset elastic member (14) are respectively connected to the second limiting part (133) and the guide member (15) to apply a restoring force to the guide member (15).

2. The seat belt fixing point guide structure (10) according to claim 1, characterized in that, The guide (15) has a T-shaped structure, including a horizontal part (153) and a vertical part (154); The guide groove (152) is formed on the horizontal part (153); The vertical part (154) is provided with a first through hole (155) and a second through hole (156). The guide member (15) is sleeved on the screw of the bolt (12) through the first through hole (155) and can rotate around the screw. The second through hole (156) is located between the first through hole (155) and the horizontal part (153) and is used to connect with one end of the reset elastic member (14). The protrusion (151) is located at the lower end of the vertical part (154) away from the horizontal part (153), and the second limiting part (133) of the limiting bracket (13) abuts against the protrusion (151) under the action of the reset elastic member (14).

3. The seat belt fixing point guide structure (10) according to claim 2, characterized in that, The base plate (11) is provided with a first threaded hole (111) for connecting with the bolt (12), and the limiting bracket (13), the reset elastic element (14) and the guide element (15) are installed between the base plate (11) and the head of the bolt (12); The base plate (11) is also provided with a limiting hole (112) for limiting the first limiting part (132) of the limiting bracket (13).

4. The seat belt fixing point guide structure (10) according to claim 3, characterized in that, It also includes a support (16) fitted onto the threaded rod of the bolt (12); The support (16) is a stepped frustum structure and is located between the head of the limiting bracket (13) and the head of the bolt (12); One end of the stepped truncated cone abuts against the bracket body (131) of the limiting bracket (13); the other end abuts against the head of the bolt (12); The reset elastic element (14) is sleeved on the middle stepped section (161) of the stepped truncated cone; The guide (15) is fitted onto the top step section (162) of the stepped truncated cone.

5. The seat belt fixing point guide structure (10) according to claim 4, characterized in that, It also includes a bushing (17) disposed in the first through hole (155) of the guide (15) and fitted with the first through hole (155) in an interference fit.

6. The seat belt fixing point guide structure (10) according to claim 5, characterized in that, It also includes a locking washer (18), which is disposed at the connection between the bolt (12) and the first threaded hole (111).

7. The seat belt fixing point guide structure (10) according to claim 6, characterized in that, It also includes a limiting post (19) disposed on the base plate (11); The limiting post (19) is disposed on one side of the vertical part (154) of the guide member (15) to limit the range of rotation of the guide member (15) under force.

8. A seat back assembly (20), characterized in that, include: Backrest frame assembly (21); Seat belt retractor (22), which is mounted on the backrest frame assembly (21); The seat belt fixing point guide structure (10) as described in any one of claims 1 to 7 is disposed on the upper part of the backrest frame assembly (21) and near the vehicle door side; The backrest foam is wrapped around the backrest frame assembly (21), the seat belt retractor (22) and the seat belt fixing point guide structure (10), and the backrest foam is provided with slots; Backrest cover (24) is fitted over the foam backrest, and an opening is provided on the backrest cover (24) at a position opposite to the slot; The seat belt webbing (23) extends from the seat belt retractor (22) and passes through the guide groove (152) on the top of the guide (15), the slot on the backrest foam and the opening on the backrest cover (24) to the outside of the seat back assembly (20).

9. A type of seat, characterized in that, Includes the seat back assembly (20) as described in claim 8.

10. A vehicle, characterized in that, Includes the seat as described in claim 9.

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