Safety belt lock catch, seat and vehicle

Abstract

The invention provides a safety belt lock catch, a seat and a vehicle. The safety belt lock catch comprises a lock catch assembly, a connecting rope, a first force limiting assembly, a second force limiting assembly and a positioning assembly. The lock catch assembly is connected with the first end of the connecting rope. A lock tongue of a safety belt can be inserted into the lock catch assembly. The second end of the connecting rope is wound around the first force limiting assembly, and the first force limiting assembly is movably connected to the positioning assembly. The second force limiting assembly is fixedly connected to the positioning assembly and connected with the first force limiting assembly. The connecting rope can drive the first force limiting assembly to rotate in the first direction under the action of the lock catch assembly, and the second force limiting assembly is driven to conduct torsional deformation in the first direction along with rotation of the first force limiting assembly, so that force limiting on the safety belt lock catch is achieved. The positioning assembly can be fixedly connected with the seat so as to support the first force limiting assembly and the second force limiting assembly.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle safety, and particularly to a seat belt buckle, a seat and a vehicle. Background Art

[0002] With the continuous improvement of people's living standards, cars have become one of the indispensable means of transportation for people to travel, and people's requirements for the safety of cars are also getting higher and higher. Among them, the seat belt buckle is one of the important components in the vehicle safety system. During the driving of the vehicle, it is necessary to cooperate with the seat belt through the seat belt buckle to restrain the passenger on the seat, which can protect the life safety of the passenger and avoid the passenger from being injured.

[0003] However, the existing seat belt buckles only have the functions of connecting and restraining the seat belt, but do not have a force limiting function. Therefore, how to provide a seat belt buckle with a force limiting function in a low-cost and easy-to-manufacture manner has become an urgent problem for those skilled in the art. Summary of the Invention

[0004] The present application provides a seat belt buckle to solve the problem of how to provide a seat belt buckle with a force limiting function in a low-cost and easy-to-manufacture manner in the prior art. The present application also provides a seat and a vehicle.

[0005] The present application provides a seat belt buckle, including: a buckle assembly, a connecting rope, a first force limiting assembly, a second force limiting assembly and a positioning assembly; The buckle assembly is connected to the first end of the connecting rope; the buckle assembly can be inserted with the tongue of the seat belt; The second end of the connecting rope is wound around the first force limiting assembly, and the first force limiting assembly is movably connected to the positioning assembly; the second force limiting assembly is fixedly connected to the positioning assembly and is connected to the first force limiting assembly; Under the action of the buckle assembly, the connecting rope can drive the first force limiting assembly to rotate in a first direction, and as the first force limiting assembly rotates, the second force limiting assembly is driven to twist and deform in the first direction to realize the force limitation of the seat belt buckle; The positioning assembly is fixedly connected to the seat to form a support for the first force limiting assembly and the second force limiting assembly.

[0006] Optionally, the positioning assembly includes a locking side plate, a connecting side plate, a first connecting hole, a second connecting hole and a first riveting assembly; The locking side plate and the connecting side plate are arranged oppositely. The locking side plate and the connecting side plate are respectively provided with bending parts, and a force-limiting space is formed after being connected by the first riveting assembly; the first force-limiting assembly and the second force-limiting assembly are connected along the connecting direction and are limited in the force-limiting space; the connecting direction is the direction in which the locking side plate and the connecting side plate face each other; The first connecting hole is arranged on the locking side plate, and the second force-limiting assembly is fixedly connected to the first connecting hole; The second connecting hole is arranged on the connecting side plate, and the first connecting hole and the second connecting hole are opposite; the first force-limiting assembly is movably connected to the second connecting hole.

[0007] Optionally, the positioning assembly further includes a second riveting assembly, a transfer bracket, and a bolt assembly; The second riveting assembly connects the locking side plate, the connecting side plate, and the transfer bracket; The transfer bracket is perpendicular to the locking side plate and the connecting side plate; The transfer bracket is fixedly connected to the seat through the bolt assembly.

[0008] Optionally, the first force-limiting assembly includes: a pressure joint, a core shaft, a connecting boss, a clamp, a connecting structure, and a limiting structure; The connecting boss is arranged on the outside of the core shaft along the axial direction of the core shaft, and the connecting boss is movably connected to the second connecting hole; The limiting structure is arranged on the inside of the core shaft along the axial direction of the core shaft, and the limiting structure is connected to the second force-limiting assembly; The connecting structure is arranged on the core shaft along the circumferential direction of the core shaft, and the connecting rope is connected to the connecting structure to wind around the core shaft; The connecting end of the clamp is connected to the first riveting assembly, so that the clamp is semi-surrounded relative to the circumferential end face of the core shaft, and the clamp plays a role of supporting and limiting the connecting rope; The pressure joint is connected to the end of the connecting rope, so as to be abutted against and limited by the connecting structure after the connecting rope is driven along the first direction.

[0009] Optionally, the connecting structure includes a receiving cavity, an annular groove, and a through hole; The receiving cavity is recessed from the circumferential end face of the core shaft along the radial direction of the core shaft. When the pressure joint is received in the receiving cavity, the pressure joint is placed inside the core shaft; The annular groove is arranged on a part of the outer circumferential end face of the core shaft along the circumferential direction of the core shaft; The through hole penetrates through the accommodation cavity and the annular groove. The connecting rope is wound around the annular groove in the second direction and passes through the through hole, and then the end of the connecting rope is connected to the pressure joint. When the connecting rope drives in the first direction, the pressure joint abuts against the cavity wall of the accommodation cavity and is limited; the second direction is opposite to the first direction.

[0010] Optionally, the connecting structure includes a limiting boss, an accommodation cavity, an annular groove and a through hole; The limiting boss protrudes from a part of the outer circumferential end face of the mandrel and is integrally formed with the mandrel; The accommodation cavity is recessed in the circumferential end face of the mandrel along the radial direction of the mandrel. When the pressure joint is accommodated in the accommodation cavity, the pressure joint is placed inside the mandrel; The annular groove is arranged on a part of the outer circumferential end face of the mandrel and the outer circumferential end face of the limiting boss along the circumferential direction of the mandrel; The through hole penetrates through the accommodation cavity and the annular groove. The connecting rope is wound around the annular groove from the limiting boss in the second direction and then passes through the through hole, and then the end of the connecting rope is connected to the pressure joint; when the connecting rope drives in the first direction, the pressure joint abuts against the cavity wall of the accommodation cavity and is limited; the second direction is opposite to the first direction.

[0011] Optionally, the first force-limiting component includes: a pressure joint, a mandrel, a connecting boss, a connecting structure and a limiting structure; The connecting boss is arranged on the outside of the mandrel along the axial direction of the mandrel, and the connecting boss is movably connected to the second connecting hole; The limiting structure is arranged on the inside of the mandrel along the axial direction of the mandrel, and the limiting structure is connected to the second force-limiting component; The connecting structure is arranged on a part of the outer circumferential end face of the mandrel along the circumferential direction of the mandrel, and the connecting rope is connected to the connecting structure to be wound around the mandrel; The pressure joint is arranged on the platform surface of the mandrel and is connected to the end of the connecting rope, so as to abut against the connecting structure and be limited when the connecting rope drives in the first direction; the platform surface of the mandrel is the outer circumferential flat end face of the remaining part of the mandrel.

[0012] Optionally, the connecting structure includes a first limiting boss, an annular groove and a through hole; The first limiting boss protrudes from the connection between a part of the outer circumferential end face of the mandrel and the first end of the platform surface and is integrally formed with the mandrel; the pressure joint abuts against the first limiting boss and is limited when the connecting rope drives in the first direction; The annular groove is provided on a part of the outer circumferential end surface of the mandrel along the circumferential direction of the mandrel; The through hole penetrates through the first limiting boss and communicates with the annular groove; the connecting rope is wound around the annular groove in the second direction and passes through the through hole, and then the end of the connecting rope is connected to the crimping head; the second direction is opposite to the first direction.

[0013] Optionally, the connecting structure includes a first limiting boss, a second limiting boss, an annular groove and a through hole; The first limiting boss protrudes and is provided at the connection between a part of the outer circumferential end surface of the mandrel and the first end of the platform surface, and is integrally formed with the mandrel; The second limiting boss protrudes and is provided at the connection between a part of the outer circumferential end surface of the mandrel and the second end of the platform surface, and is integrally formed with the mandrel; The annular groove is provided on a part of the outer circumferential end surface of the mandrel and the outer circumferential end surface of the second limiting boss along the circumferential direction of the mandrel; The through hole penetrates through the first limiting boss and communicates with the annular groove; the connecting rope is wound around the annular groove from the second limiting boss in the second direction and then passes through the through hole, and then the end of the connecting rope is connected to the crimping head; the second direction is opposite to the first direction.

[0014] Optionally, the limiting structure includes a receiving hole, a first internal spline, a first counterbore and a second counterbore; The receiving hole is provided inside the mandrel along the axial direction of the mandrel; The first internal spline, the first counterbore and the second counterbore are sequentially arranged in the receiving hole along the axial direction away from the connecting boss.

[0015] Optionally, the second force-limiting component includes: a shaft head and a torsion bar; The first end of the shaft head is fixedly connected to the first connection hole; The second end of the shaft head is received in the second counterbore and is connected to the first end of the torsion bar to form a fixation for the first end of the torsion bar; The rod body of the torsion bar is received in the first counterbore, and the second end of the torsion bar is connected to the first internal spline to form a fixation for the second end of the torsion bar.

[0016] The present application also provides a seat, including a seat main body and the seat belt buckle as described above; the positioning component of the seat belt buckle can be fixedly connected to the seat main body.

[0017] The present application also provides a vehicle, comprising: a vehicle body and the seat as described above, and the seat is arranged in the vehicle body.

[0018] Compared with the prior art, the present application has the following advantages: The present application provides a seat belt buckle, comprising: a buckle assembly, a connecting rope, a first force limiting assembly, a second force limiting assembly, and a positioning assembly. Among them, the buckle assembly is connected to the first end of the connecting rope. The buckle assembly can be plugged with the tongue of the seat belt. The second end of the connecting rope is wound around the first force limiting assembly, and the first force limiting assembly is movably connected to the positioning assembly. The second force limiting assembly is fixedly connected to the positioning assembly and is connected to the first force limiting assembly. Under the action of the buckle assembly, the connecting rope can drive the first force limiting assembly to rotate in a first direction, and as the first force limiting assembly rotates, the second force limiting assembly is driven to twist and deform in the first direction to achieve force limitation of the seat belt buckle. The positioning assembly can be fixedly connected to the seat to form a support for the first force limiting assembly and the second force limiting assembly.

[0019] For the seat belt buckle provided by the present application, the buckle assembly is connected to the first force limiting assembly through the connecting rope, and the first force limiting assembly is connected to the second force limiting assembly. As the first force limiting assembly rotates, the second force limiting assembly is driven to twist and deform in the first direction to achieve force limitation of the seat belt buckle. That is, the structure adopted by the seat belt buckle provided by the present application is simple and the manufacturing cost is relatively low. While realizing the functions of connecting and restraining the seat belt, it can also provide a force limiting function for the connected seat belt, thereby further improving the safety guarantee for passengers. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a seat belt buckle provided by an embodiment of the present application.

[0021] Figure 2 is an exploded view of a seat belt buckle provided by an embodiment of the present application.

[0022] Figure 3 is a schematic diagram of the state when the force limiting function of the seat belt buckle provided by an embodiment of the present application is started.

[0023] Figure 4 is Figure 3 a partial structural diagram of

[0024] Figure 5 is a schematic structural diagram of the positioning assembly provided by an embodiment of the present application.

[0025] Figure 6 is a schematic structural diagram of the first mandrel at an angle provided by an embodiment of the present application.

[0026] Figure 7It is a schematic structural diagram of the first mandrel provided by an embodiment of the present application from another angle.

[0027] Figure 8 It is a schematic structural diagram of the second mandrel provided by an embodiment of the present application from an angle.

[0028] Figure 9 It is a schematic structural diagram of the third mandrel provided by an embodiment of the present application from an angle.

[0029] Figure 10 It is a schematic structural diagram of the third mandrel provided by an embodiment of the present application from another angle.

[0030] Figure 11 It is a schematic structural diagram of the fourth mandrel provided by an embodiment of the present application from an angle.

[0031] Figure 12 It is a schematic structural diagram of the compression joint provided by an embodiment of the present application.

[0032] Figure 13 It is a schematic structural diagram of the shaft head provided by an embodiment of the present application.

[0033] Figure 14 It is a schematic structural diagram of the clamp provided by an embodiment of the present application.

[0034] Reference numerals: Locking component 1, connecting rope 2, first force-limiting component 3, compression joint 31, communication hole 311, mandrel 32, platform surface 321, first radial end face 322, second radial end face 323, connecting boss 33, connecting structure 34, accommodation cavity 340, first limiting boss 341, second limiting boss 342, annular groove 343, through hole 344, limiting structure 35, accommodation hole 351, first internal spline 352, first sunk platform 353, second sunk platform 354, clamp 36, buckle 361, protruding structure 3611, opening groove 362, antifriction ring 37, second force-limiting component 4, shaft head 41, round boss 411, regular hexagon boss 412, connecting boss body 413, second internal spline 414, column boss 415, torsion bar 42, first spline 421, second spline 422, positioning component 5, locking side plate 50, connecting side plate 51, bending part 52, first connecting hole 53, second connecting hole 54, first riveting component 55, first rivet hole 551, first rivet 552, second riveting component 56, second rivet hole 561, second rivet 562, gasket 563, adapter bracket 57, horizontal bracket plate 571, vertical bracket plate 572, bolt component 58, bolt column 581, bolt hole 582, flanging 59, force-limiting space 6. Detailed implementation manners

[0035] In the following description, numerous specific details are set forth to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementations disclosed below.

[0036] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] Currently, existing seat belt buckles only have the functions of connecting and restraining the seat belt, but do not have a force-limiting function. Therefore, how to provide a seat belt buckle with a force-limiting function in a low-cost and easy-to-manufacture manner has become an urgent problem for those skilled in the art.

[0039] For this reason, the present application provides a seat belt buckle, including: a buckle assembly, a connecting rope, a first force-limiting assembly, a second force-limiting assembly, and a positioning assembly. Among them, the buckle assembly is connected to the first end of the connecting rope. The buckle assembly can be inserted with the tongue of the seat belt. The second end of the connecting rope is wound around the first force-limiting assembly, and the first force-limiting assembly is movably connected to the positioning assembly. The second force-limiting assembly is fixedly connected to the positioning assembly and is connected to the first force-limiting assembly. The connecting rope can drive the first force-limiting assembly to rotate in the first direction under the action of the buckle assembly, and as the first force-limiting assembly rotates, it drives the second force-limiting assembly to twist and deform in the first direction to achieve the force-limiting of the seat belt buckle. The positioning assembly can be fixedly connected to the seat to form a support for the first force-limiting assembly and the second force-limiting assembly.

[0040] It can be understood that for the seat belt buckle provided in this application, the buckle assembly is connected to the first force-limiting assembly through a connecting rope, and the first force-limiting assembly is connected to the second force-limiting assembly. As the first force-limiting assembly rotates, it drives the second force-limiting assembly to twist and deform along the first direction, so as to achieve the force limitation of the seat belt buckle. That is, the structure adopted by the seat belt buckle provided in this application is simple and the manufacturing cost is relatively low. While realizing the functions of connecting and restraining the seat belt, it can also provide a force-limiting function for the connected seat belt, thereby further enhancing the safety guarantee for passengers.

[0041] Next, the seat belt buckle provided in this application will be described in detail with reference to the accompanying drawings. Among them, Figure 1 is a schematic structural diagram of a seat belt buckle provided by an embodiment of this application. Figure 2 is an exploded view of a seat belt buckle provided by an embodiment of this application. Figure 3 is a schematic diagram of the state when the force-limiting function of the seat belt buckle provided by an embodiment of this application is activated. Figure 4 is Figure 3 a partial structural diagram of Figure 5 is a schematic structural diagram of the positioning assembly provided by an embodiment of this application. Figure 6 is a schematic structural diagram of the first mandrel at an angle provided by an embodiment of this application. Figure 7 is a schematic structural diagram of the first mandrel at another angle provided by an embodiment of this application. Figure 8 is a schematic structural diagram of the second mandrel at an angle provided by an embodiment of this application. Figure 9 is a schematic structural diagram of the third mandrel at an angle provided by an embodiment of this application. Figure 10 is a schematic structural diagram of the third mandrel at another angle provided by an embodiment of this application. Figure 11 is a schematic structural diagram of the fourth mandrel at an angle provided by an embodiment of this application. Figure 12 is a schematic structural diagram of the crimping joint provided by an embodiment of this application. Figure 13 is a schematic structural diagram of the shaft head provided by an embodiment of this application. Figure 14 is a schematic structural diagram of the clamp provided by an embodiment of this application.

[0042] Such as Figures 1 to 14As shown in the figure, the present application provides a seat belt buckle, including: a buckle assembly 1, a connecting rope 2, a first force limiting assembly 3, a second force limiting assembly 4, and a positioning assembly 5. Among them, the buckle assembly 1 is connected to the first end of the connecting rope 2. The buckle assembly 1 can be plugged into the tongue of the seat belt. The second end of the connecting rope 2 is wound around the first force limiting assembly 3, and the first force limiting assembly 3 is movably connected to the positioning assembly 5. The second force limiting assembly 4 is fixedly connected to the positioning assembly 5 and is connected to the first force limiting assembly 3. Under the action of the buckle assembly 1, the connecting rope 2 can drive the first force limiting assembly 3 to rotate in the first direction. As the first force limiting assembly 3 rotates, it drives the second force limiting assembly 4 to twist and deform in the first direction, so as to achieve the force limitation of the seat belt buckle. In one example, the first direction may be the clockwise direction. The positioning assembly 5 can be fixedly connected to the seat to support the first force limiting assembly 3 and the second force limiting assembly 4.

[0043] Among them, in this embodiment, the positioning assembly 5 includes: a locking side plate 50, a connecting side plate 51, a first connecting hole 53, a second connecting hole 54, and a first riveting assembly 55. Among them, the locking side plate 50 and the connecting side plate 51 are arranged oppositely. The locking side plate 50 and the connecting side plate 51 are respectively provided with a bending part 52, and after being connected by the first riveting assembly 55, a force limiting space 6 is formed. Specifically, in one example, the locking side plate 50 and the connecting side plate 51 are in a mirror image structure (except for the different shapes of the first connecting hole 53 and the second connecting hole 54). The locking side plate 50 and the connecting side plate 51 are arranged as long strip plates. Opposite side ears are provided at the upper parts of the locking side plate 50 and the connecting side plate 51. The middle parts of the locking side plate 50 and the connecting side plate 51 are set as the bending part 52, so that the upper parts of the locking side plate 50 and the connecting side plate 51 are not in the same plane as their respective lower parts, so that the upper parts of the locking side plate 50 and the connecting side plate 51 can form a force limiting space 6. At the same time, the end faces of the lower parts of the locking side plate 50 and the connecting side plate 51 are attached, which is convenient for assembly. The first force limiting assembly 3 and the second force limiting assembly 4 are connected along the connecting direction and are limited in the force limiting space 6. Among them, the connecting direction is the relative connecting direction of the locking side plate 50 and the connecting side plate 51.

[0044] In one example, in order to improve the stiffness of the locking side plate 50 and the connecting side plate 51, several triangular reinforcing ribs are provided on the respective bending parts 52 of the locking side plate 50 and the connecting side plate 51.

[0045] In one example, flanges 59 are provided on both sides of the locking side plate 50 and the connecting side plate 51 respectively. The flanges 59 can prevent the risk of the connecting rope 2 being squeezed and broken after being twisted and stressed.

[0046] In one example, the first connection hole 53 is provided on the locking side plate 50, and specifically located at the upper part of the locking side plate 50. The first connection hole 53 is set as a regular hexagonal hole, and the regular hexagonal hole can improve the stability of the connection. Of course, in other examples, the hole shape of the first connection hole 53 can also be other shapes, such as triangular, quadrilateral or pentagonal, etc. The second force-limiting component 4 is fixedly connected to the first connection hole 53. The second connection hole 54 is provided on the connection side plate 51, specifically located at the upper part of the connection side plate 51, and the first connection hole 53 and the second connection hole 54 are opposite to each other. In one example, the second connection hole 54 is set as a circular shape. Of course, in other examples, the hole shape of the first connection hole 53 can also be other shapes, such as triangular, quadrilateral or pentagonal, etc. The first force-limiting component 3 is movably connected to the second connection hole 54.

[0047] In this embodiment, the locking side plate 50 and the connection side plate 51 can be connected by a first riveting assembly 55. Among them, the first riveting assembly 55 includes a first rivet hole 551 and a first rivet 552. The first rivet hole 551 is provided on the respective side ears of the locking side plate 50 and the connection side plate 51. The first rivet 552 is sequentially riveted in the first rivet holes 551 of the locking side plate 50 and the connection side plate 51 respectively to fixedly connect the locking side plate 50 and the connection side plate 51.

[0048] Further, in this embodiment, in order to further improve the stability of the connection between the locking side plate 50 and the connecting side plate 51, and to be stably installed on the seat of the car, the positioning assembly 5 also includes a second rivet assembly 56, an adapter bracket 57, and a bolt assembly 58. Among them, the second rivet assembly 56 connects the locking side plate 50, the connecting side plate 51 and the adapter bracket 57. Specifically, in one example, the second rivet assembly 56 includes a second rivet hole 561 and a second rivet 562, and the second rivet hole 561 is arranged at the lower part of the locking side plate 50 and the connecting side plate 51, and the second rivet 562 is riveted in the second rivet hole 561 of the locking side plate 50 and the connecting side plate 51 in turn, so as to fix the locking side plate 50 and the connecting side plate 51. In one example, in order to strengthen the stability of the connection between the second rivet 562 and the second rivet hole 561, a gasket 563 is also provided, and the gasket 563 is arranged between the second rivet 562 and the second rivet hole 561. The adapter bracket 57 is arranged vertically with the locking side plate 50 and the connecting side plate 51. In one example, the adapter bracket 57 is arranged in an L shape, including an integrally formed horizontal bracket plate 571 and a vertical bracket plate 572, and a third rivet hole is correspondingly arranged on the vertical bracket plate 572, and the third rivet hole and the second rivet hole 561 have the same aperture, and the second rivet 562 is riveted in turn in the second rivet hole 561 of the locking side plate 50 and the connecting side plate 51 and the third rivet hole of the vertical bracket plate 572, so as to fix the locking side plate 50, the connecting side plate 51 and the adapter bracket 57. The adapter bracket 57 is fixedly connected to the seat through a bolt assembly 58. In one example, the bolt assembly 58 includes a bolt column 581, a bolt cap and a bolt hole 582, the bolt hole 582 is set on the horizontal bracket plate 571, the bolt column 581 passes through the bolt hole 582 and is screwed to the bolt hole 582 on the seat, and is fixed by the bolt cap to fix the adapter bracket 57 to the seat, thereby connecting the entire seat belt buckle to the seat.

[0049] The first force limiting component 3 and the second force limiting component 4 are connected along a connecting direction and are defined in a force limiting space 6 .

[0050] In this embodiment, the first force-limiting assembly 3 includes: a crimping head 31, a core shaft 32, a connecting boss 33, a connecting structure 34, a limiting structure 35 and a clamp 36. Figure 6 , Figure 7 As shown, the core shaft 32 is a cylindrical structure as a whole. The connecting boss 33 is arranged on the outer side of the core shaft 32 along the axial direction of the core shaft 32, and specifically protrudes from the outer side of the first radial end face 322 of the core shaft 32. The connecting boss 33 is set as a cylinder, and the diameter of the connecting boss 33 is adapted to the hole diameter of the second connecting hole 54, so that the connecting boss 33 is inserted into the second connecting hole 54 to achieve a movable connection with the second connecting hole 54 on the connecting side plate 51.

[0051] In one example, in order to reduce the frictional loss between the connecting boss 33 and the second connecting hole 54, an antifriction ring 37 is further provided. The antifriction ring 37 is arranged between the connecting boss 33 and the second connecting hole 54 to reduce the friction when the connecting boss 33 rotates relative to the second connecting hole 54.

[0052] The limiting structure 35 is arranged inside the mandrel 32 along the axial direction of the mandrel 32, and the limiting structure 35 is connected to the second force-limiting assembly 4. Specifically, in this embodiment, the limiting structure 35 includes a receiving hole 351, a first internal spline 352, a first counterbore 353 and a second counterbore 354. Among them, the receiving hole 351 is arranged inside the mandrel 32 along the axial direction of the mandrel 32. The receiving hole 351 penetrates through the second radial end face 323 (the first radial end face 322 opposite to the connecting boss 33) on the other side of the mandrel 32, and the receiving hole 351 does not penetrate through the connecting boss 33. The first internal spline 352, the first counterbore 353 and the second counterbore 354 are sequentially arranged in the receiving hole 351 along the axial direction away from the connecting boss 33, that is, the axial distance of the first internal spline 352 relative to the connecting boss 33 is less than the axial distance of the first counterbore 353 relative to the connecting boss 33 is less than the axial distance of the second counterbore 354 relative to the connecting boss 33, and the axial dimensions of the first internal spline 352, the first counterbore 353 and the second counterbore 354 are set according to the second force-limiting assembly 4. In one example, the diameter dimension of the first counterbore 353 is smaller than the diameter dimension of the second counterbore 354.

[0053] The connecting structure 34 is arranged on the mandrel 32 along the circumferential direction of the mandrel 32, and the connecting rope 2 is connected to the connecting structure 34 to wind around the mandrel 32. In one example, the connecting rope 2 includes a steel wire rope. In other examples, the connecting rope 2 can also be other cables with strength. Specifically, in one example, the connecting structure 34 includes a receiving cavity 340, an annular groove 343 and a through hole 344. Among them, the receiving cavity 340 is recessed from the circumferential end face of the mandrel 32 along the radial direction of the mandrel 32, and the compression joint 31 is received in the receiving cavity 340. When the compression joint 31 is received in the receiving cavity 340, the compression joint 31 is placed inside the mandrel 32. In one example, the receiving cavity 340 is recessed from the circumferential end face of the annular groove 343 along the radial direction of the mandrel 32.

[0054] The annular groove 343 is provided on a partial outer circumferential end face of the mandrel 32 along the circumferential direction of the mandrel 32. Specifically, in one example, the annular groove 343 is provided as one. The through hole 344 is provided to penetrate the accommodation cavity 340 and the annular groove 343. In one example, the through hole 344 penetrates the accommodation cavity 340 and the starting section of the annular groove 343, and the penetrating direction of the through hole 344 is distributed in the radial direction of the mandrel 32. The connecting rope 2 is wound around the annular groove 343 in the second direction and passes through the through hole 344, and then the end of the connecting rope 2 is connected to the compression joint 31. The compression joint 31 abuts against the cavity wall of the accommodation cavity 340 and is limited after being driven by the connecting rope 2 in the first direction. Among them, the second direction is opposite to the first direction, that is, the second direction is the counterclockwise direction.

[0055] In another example, the connecting structure 34 can also be the following structure, such as Figure 8 As shown, specifically, the connecting structure 34 includes: an accommodation cavity 340, a limiting boss 345, an annular groove 343 and a through hole 344. Among them, the accommodation cavity 340 is recessed in the circumferential end face of the mandrel 32 along the radial direction of the mandrel 32, and the compression joint 31 is accommodated in the accommodation cavity 340. When the compression joint 31 is accommodated in the accommodation cavity 340, the compression joint 31 is placed inside the mandrel 32. In one example, the accommodation cavity 340 is recessed in the circumferential end face of the annular groove 343 along the radial direction of the mandrel 32.

[0056] The annular groove 343 is provided on a partial outer circumferential end face of the mandrel 32 and the outer circumferential end face of the limit boss 345 along the circumferential direction of the mandrel 32. Specifically, in one example, two annular grooves 343 are provided. The through hole 344 is provided to penetrate through the accommodating cavity 340 and the annular groove 343. In one example, the through hole 344 penetrates through the starting section of the accommodating cavity 340 and the annular groove 343, and the penetrating direction of the through hole 344 is distributed in the radial direction of the mandrel 32. The connecting rope 2 is wound around the annular groove 343 from the limit boss 345 in the second direction, then passes through the through hole 344, and the end of the connecting rope 2 is connected to the compression joint 31. The compression joint 31 abuts against the cavity wall of the accommodating cavity 340 and is limited after being driven by the connecting rope 2 in the first direction. Wherein, the second direction is opposite to the first direction, that is, the second direction is the counterclockwise direction. In this embodiment, the limit boss 345 protrudes on a partial outer circumferential end face of the mandrel 32, and an annular groove 343 is provided on the outer circumferential end face of the second limit boss 342. The purpose is that the annular groove 343 of the mandrel 32 has the characteristic of expanding radially outward of the mandrel 32 in the initial unwinding area of the connecting rope 2 (steel wire rope). Correspondingly, the side wall of the mandrel 32 also expands outward accordingly. After the connecting rope 2 receives the pulling force transmitted by the buckle assembly 1, this radially outward expanding annular groove 343 is first subjected to the pressure of the locking head assembly. Since the annular groove 343 in this area of the mandrel 32 is farther from the axis of the mandrel 32 than other areas, the torsion bar 42 can be twisted with a smaller force. In other words, the design of the limit boss 345 can start the force limit function with a smaller force at the beginning of the force limit function activation, or start the force limit function with a more stable force limit rising trend.

[0057] The compression joint 31 is accommodated in the accommodating cavity 340 and is connected to the end of the connecting rope 2 to abut against the cavity wall of the accommodating cavity 340 and be limited after being driven by the connecting rope 2 in the first direction. In one example, the overall structure of the compression joint 31 is a cube structure, the size of the compression joint 31 is adapted to the cavity of the accommodating cavity 340, and one end face of the compression joint 31 facing the cavity wall of the accommodating cavity 340 is set as a flat end face, so that the compression joint 31 can abut against the cavity wall of the accommodating cavity 340 and be limited by the cavity wall of the accommodating cavity 340 when the compression joint 31 moves in the first direction. In addition, in one example, a communication hole 311 is provided inside the compression joint 31, and the hole shape of the communication hole 311 is preferably a round hole, and the round hole is convenient for the connecting rope 2 to pass through and connect. In addition, the number of the communication holes 311 corresponds to the number of the through holes 344 and the positions are opposite. The end of the connecting rope 2 is connected to the compression joint 31 through the communication hole 311 to realize the connection between the end of the connecting rope 2 and the compression joint 31. After the end of the connecting rope 2 passes through and is connected to the compression joint 31, it then passes through the through hole 344, is wound around the annular groove 343 in the second direction, and is connected to the buckle assembly 1.

[0058] The connecting end of the clamp 36 is connected to the first riveting assembly 55, so that the clamp 36 is semi-surrounded relative to the circumferential end face of the mandrel 32, and the clamp 36 plays a role in supporting and limiting the connecting rope 2. Specifically, in one example, the clamp 36 is integrally U-shaped, and this U-shaped structure can be adapted to the circumferential end face of the mandrel 32 to be semi-surrounded relative to the circumferential end face of the mandrel 32. The two ends of the U-shaped clamp 36 are provided with buckles 361, and the buckles 361 can be hooked to the first rivet 552 to connect the clamp 36 to the first rivet 552, and thus connected to the positioning assembly 5. In one example, two buckles 361 are respectively arranged at each end of the clamp 36, that is, a total of four buckles 361 are provided at the two ends of the clamp 36. Further, in one example, in order to improve the stability of the connection between the buckle 361 and the first rivet 552, a convex structure 3611 is further provided at the end of the buckle 361, and the convex structure 3611 is in interference fit when hooked to the first rivet 552. In addition, in one example, an opening groove 362 is further provided on the U-shaped wall of the U-shaped clamp 36, and the opening groove 362 is located between the two buckles 361, and the opening groove 362 is used to avoid the rotating connecting rope 2. The bottom of the U-shaped wall of the U-shaped clamp 36 can prevent the connecting rope 2 from disengaging from the mandrel 32 when the lock assembly 1 is subjected to a downward pressure, that is, it can also prevent the lock assembly 1 from moving downward when subjected to a downward pressure.

[0059] In another example, the first force-limiting assembly 3 can also be the following structure: Specifically, the first force-limiting assembly 3 includes: a compression joint 31, a mandrel 32, a connecting boss 33, a connecting structure 34 and a limiting structure 35. Among them, as Figure 9 and Figure 10 shown, the mandrel 32 is integrally cylindrical. In one example, the outer circumferential end face of the mandrel 32 is composed of a circumferential end face partially in an arc shape and a flat surface 321. The connecting boss 33 is arranged on the outside of the mandrel 32 along the axial direction of the mandrel 32, and specifically protrudes from the outside of the first radial end face 322 of the mandrel 32. The connecting boss 33 is set as a cylinder, and the diameter dimension of the connecting boss 33 is adapted to the aperture diameter of the second connecting hole 54, so as to insert the connecting boss 33 into the second connecting hole 54 to realize movable connection with the second connecting hole 54 on the connecting side plate 51.

[0060] The limiting structure 35 is arranged inside the mandrel 32 along the axial direction of the mandrel 32, and the limiting structure 35 is connected to the second force-limiting component 4. Specifically, in this embodiment, the limiting structure 35 includes a receiving hole 351, a first internal spline 352, a first counterbore 353, and a second counterbore 354. Among them, the receiving hole 351 is arranged inside the mandrel 32 along the axial direction of the mandrel 32. The receiving hole 351 penetrates through the second radial end face 323 (the first radial end face 322 opposite to the connecting boss 33) on the other side of the mandrel 32, and the receiving hole 351 does not penetrate through the connecting boss 33. The first internal spline 352, the first counterbore 353, and the second counterbore 354 are sequentially arranged in the receiving hole 351 along the axial direction away from the connecting boss 33, that is, the axial distance of the first internal spline 352 relative to the connecting boss 33 is less than the axial distance of the first counterbore 353 relative to the connecting boss 33, which is less than the axial distance of the second counterbore 354 relative to the connecting boss 33, and the axial dimensions of the first internal spline 352, the first counterbore 353, and the second counterbore 354 are set according to the second force-limiting component 4. In an example, the diameter dimension of the first counterbore 353 is smaller than the diameter dimension of the second counterbore 354.

[0061] The connecting structure 34 is arranged on a part of the outer circumferential end face of the mandrel 32 along the circumferential direction of the mandrel 32, and the connecting rope 2 is connected to the connecting structure 34 to wind around the mandrel 32. In an example, the connecting rope 2 includes a steel wire rope. In other examples, the connecting rope 2 can also be other cables with strength. Specifically, in an example, the connecting structure 34 includes a first limiting boss 341, an annular groove 343, and a through hole 344. Among them, the first limiting boss 341 protrudes and is arranged at the connection between a part of the outer circumferential end face of the mandrel 32 and the first end of the platform surface 321, and is integrally formed with the mandrel 32. The compression joint 31 abuts against the first limiting boss 341 and is limited after the connecting rope 2 drives along the first direction. The first end of the platform surface 321 refers to the end of the platform surface 321 close to the first limiting boss 341. The first limiting boss 341 includes an outer circumferential end face and a vertical end face. The outer circumferential end face of the first limiting boss 341 is arc-shaped and is integrally connected to a part of the outer circumferential end face of the mandrel 32 after extension. The vertical end face of the first limiting boss 341 is arranged at an angle less than or equal to a right angle with the platform surface 321 of the mandrel 32. In an example, the vertical end face of the first limiting boss 341 is arranged perpendicular to the platform surface 321 of the mandrel 32. Of course, in other examples, the first limiting boss 341 can also be other structural forms, such as a cube and a cylinder, etc.

[0062] The annular groove 343 is provided on a partial outer circumferential end surface of the mandrel 32 along the circumferential direction of the mandrel 32. Specifically, in one example, two annular grooves 343 are provided. The through hole 344 penetrates through the first limiting boss 341 and communicates with the annular groove 343. In one example, the through direction of the through hole 344 is distributed along the circumferential extension direction of the first limiting boss 341. Two through holes 344 are provided, and each through hole 344 is in one-to-one correspondence and communication with each annular groove 343. The connecting rope 2 is wound around the annular groove 343 in the second direction and passes through the through hole 344, and then the end of the connecting rope 2 is connected to the crimping joint 31. Wherein, the second direction is opposite to the first direction, that is, the second direction is the counterclockwise direction.

[0063] In another example, the connecting structure 34 can also be the following structure, such as Figure 11 As shown, specifically, the connecting structure 34 includes a first limiting boss 341, a second limiting boss 342, an annular groove 343 and a through hole 344. Among them, the first limiting boss 341 protrudes and is provided at the connection of a partial outer circumferential end surface of the mandrel 32 and the first end of the platform surface 321, and is integrally formed with the mandrel 32. The second limiting boss 342 protrudes and is provided at the connection of a partial outer circumferential end surface of the mandrel 32 and the second end of the platform surface 321, and is integrally formed with the mandrel 32. The first end of the platform surface 321 refers to the end of the platform surface 321 close to the first limiting boss 341. Correspondingly, the second end of the platform surface 321 refers to the end of the platform surface 321 far from the first limiting boss 341. The crimping joint 31 abuts against and is limited by the first limiting boss 341 and the second limiting boss 342 after being driven by the connecting rope 2 in the first direction. The first limiting boss 341 includes an outer circumferential end surface and a vertical end surface. The outer circumferential end surface of the first limiting boss 341 is arc-shaped and is integrally connected to a partial outer circumferential end surface of the mandrel 32 after extension. The vertical end surface of the first limiting boss 341 is arranged at an angle less than or equal to a right angle with the platform surface 321 of the mandrel 32. In one example, the vertical end surface of the first limiting boss 341 is arranged perpendicular to the platform surface 321 of the mandrel 32. Of course, in other examples, the first limiting boss 341 can also be other structural forms, such as a cube and a cylinder, etc.

[0064] The annular groove 343 is provided on the partial outer circumferential end surface of the mandrel 32 and the outer circumferential end surface of the second limiting boss 342 along the circumferential direction of the mandrel 32. Specifically, in one example, two annular grooves 343 are provided. The through hole 344 penetrates through the first limiting boss 341 and communicates with the annular groove 343. In one example, the through direction of the through hole 344 is distributed along the circumferential extension direction of the first limiting boss 341. Two through holes 344 are provided, and each through hole 344 is in one-to-one correspondence and communication with each annular groove 343. The connecting rope 2 is wound around the annular groove 343 from the second limiting boss 342 in the second direction, then passes through the through hole 344, and the end of the connecting rope 2 is connected to the crimping joint 31. Among them, the second direction is opposite to the first direction, that is, the second direction is the counterclockwise direction. In this embodiment, the second limiting boss 342 is provided at the connection between the partial outer circumferential end surface of the mandrel 32 and the second end of the platform surface 321, and the annular groove 343 is provided on the outer circumferential end surface of the second limiting boss 342. The purpose is that the annular groove 343 of the mandrel 32 has the characteristic of expanding radially outward of the mandrel 32 in the area where the connecting rope 2 (steel wire rope) is initially unwound. Correspondingly, the side wall of the mandrel 32 also expands outward accordingly. After the connecting rope 2 receives the pulling force transmitted by the locking component 1, the radially outward expanding annular groove 343 is first subjected to the pressure of the locking head component. Since the annular groove 343 in this area of the mandrel 32 is farther from the axis of the mandrel 32 than other areas, the torsion bar 42 can be twisted with a smaller force. In other words, the design of the second limiting boss 342 can start the force limiting function with a smaller force or start the force limiting function with a more stable force limiting rising trend at the beginning of the force limiting function activation.

[0065] The crimping joint 31 is provided on the platform surface 321 of the mandrel 32 and is connected to the end of the connecting rope 2 so as to abut against and be limited by the connecting structure 34 after the connecting rope 2 is driven in the first direction. The platform surface 321 of the mandrel 32 is the outer circumferential flat end surface of the remaining part of the mandrel 32. In one example, the overall structure of the crimping joint 31 is a cube structure, the length dimension of the crimping joint 31 is adapted to the platform surface 321 of the mandrel 32, and one end surface of the crimping joint 31 facing the platform surface 321 of the mandrel 32 is set as a flat end surface so that the crimping joint 31 can be installed on the platform surface 321 of the mandrel 32. And one end surface of the crimping joint 31 facing the first limiting boss 341 is set as a vertical flat end surface, and the vertical flat end surface can be in close contact with the vertical end surface of the first limiting boss 341 so as to be limited by the vertical end surface of the first limiting boss 341 when the crimping joint 31 moves in the first direction. Additionally, in one example, a communication hole 311 in the horizontal direction is provided inside the crimping joint 31, and the hole shape of the communication hole 311 is preferably set as a round hole, which is convenient for the connecting rope 2 to pass through and be connected. Additionally, the number of the communication holes 311 corresponds to the number of the through holes 344 and the positions are opposite. The end of the connecting rope 2 is connected to the crimping joint 31 through the communication hole 311 to realize the connection between the end of the connecting rope 2 and the crimping joint 31. After the end of the connecting rope 2 passes through and is connected to the crimping joint 31, it then passes through the through hole 344, winds around the annular groove 343 in the second direction, and is connected to the buckle assembly 1.

[0066] The above is the specific structure of the first force-limiting component 3. The second force-limiting component 4 is fixedly connected to the positioning component 5 and is connected to the first force-limiting component 3. Specifically, in this embodiment, the second force-limiting component 4 includes: a shaft head 41 and a torsion bar 42. Among them, the shaft head 41 includes an integrally formed first end and a second end. The first end of the shaft head 41 includes an integrally formed round boss 411 and a regular hexagon boss 412. The second end of the shaft head 41 includes an integrally formed connecting boss body 413 and a second internal spline 414. Further, the first end of the shaft head 41 is fixedly connected to the first connection hole 53. Specifically, the round boss 411 is assembled with the left side surface of the locking side plate 50, and the regular hexagon boss 412 is assembled with the first connection hole 53 (regular hexagon hole) of the locking side plate 50. The second end of the shaft head 41 is accommodated in the second sink 354 and is connected to the first end of the torsion bar 42 and forms a fixation for the first end of the torsion bar 42. Specifically, the connecting boss body 413 is assembled with the second sink 354 of the mandrel 32, and the second internal spline 414 and the first end of the torsion bar 42 are assembled. In one example, column bosses 415 are further provided on the edge of the regular hexagon boss 412, and specifically, the column bosses 415 are provided on the spaced edges of the regular hexagon boss 412. There are two column bosses 415 in total, and the column bosses 415 and the first connection hole 53 of the locking side plate 50 are in interference fit.

[0067] In one example, the torsion bar 42 includes a first end and a second end. The first end of the torsion bar 42 is provided with a first spline 421, and the second end of the torsion bar 42 is provided with a second spline 422. The first spline 421 at the first end of the torsion bar 42 is connected to the second internal spline 414 of the shaft head 41. The rod body of the torsion bar 42 is received in the first counterbore 353, and the second spline 422 at the second end of the torsion bar 42 is connected to the first internal spline 352 of the mandrel to fix the second end of the torsion bar 42.

[0068] In the application scenario, when the force-limiting function of the seat belt buckle is in the unactivated state, the first limiting boss 341 on the mandrel 32 is located directly above the locking side plate 50 and the connecting side plate 51. The connecting rope 2 is wound counterclockwise (the second direction (as Figure 3 shown)) in the annular groove 343 of the mandrel 32. The end of the connecting rope 2 passes through the crimping joint 31 and is limited to the left side of the first limiting boss 341 of the mandrel 32. At this time, the torsion bar 42 is in an untwisted state. When the force-limiting function of the seat belt buckle is in the activated state. The buckle assembly 1 is subjected to the resultant force of the pulling forces towards the front of the vehicle and towards the passenger side. The connecting rope 2 connected to the buckle assembly 1 is also subjected to the pulling force in the same direction. Under the action of the pulling force of the connecting rope 2, the crimping joint 31 at the end of the connecting rope 2 has a rightward thrust on the first limiting boss 341 of the mandrel 32. The mandrel 32 rotates clockwise (the first direction (as Figure 4 shown)) around its axis through the connecting boss 33. The second end of the torsion bar 42 is fixedly connected to the first internal spline 352 of the mandrel 32, and the first end of the torsion bar 42 is fixedly connected to the second internal spline 414 of the shaft head 41. Therefore, the second end of the torsion bar 42 connected to the mandrel 32 also rotates clockwise (the first direction) around the axis of the torsion bar 42, that is, the body of the torsion bar 42 is in a state of torsional deformation to absorb energy to achieve the force-limiting effect. The connecting rope 2 wound around the periphery of the mandrel 32 will unwind from the periphery of the mandrel 32 as the mandrel 32 rotates clockwise, which is equivalent to the torsion bar 42 being pulled out from the positioning assembly 5, and the buckle assembly 1 displaces in the direction of the resultant force of the pulling forces it receives. When the mandrel 32 rotates by about a full circle angle, the connecting rope 2 wound around the periphery of the mandrel 32 is completely pulled out. The end of the connecting rope 2 is still limited to the left side of the first limiting boss 341 of the mandrel 32. The position of the buckle assembly 1 is displaced to the farthest position. At this time, the body of the torsion bar 42 stops after being twisted to the maximum angle.

[0069] The present application provides a seat belt buckle, including: a buckle assembly 1, a connecting rope 2, a first force limiting assembly 3, a second force limiting assembly 4, and a positioning assembly 5. Among them, the buckle assembly 1 is connected to the first end of the connecting rope 2. The buckle assembly 1 can be plugged into the tongue of the seat belt. The second end of the connecting rope 2 is wound around the first force limiting assembly 3, and the first force limiting assembly 3 is movably connected to the positioning assembly 5. The second force limiting assembly 4 is fixedly connected to the positioning assembly 5 and is connected to the first force limiting assembly 3. Under the action of the buckle assembly 1, the connecting rope 2 can drive the first force limiting assembly 3 to rotate in the first direction, and as the first force limiting assembly 3 rotates, the second force limiting assembly 4 is driven to twist and deform in the first direction, so as to achieve the force limitation of the seat belt buckle. The positioning assembly 5 can be fixedly connected to the seat to form a support for the first force limiting assembly 3 and the second force limiting assembly 4.

[0070] For the seat belt buckle provided by the present application, the buckle assembly 1 is connected to the first force limiting assembly 3 through the connecting rope 2, and the first force limiting assembly 3 is connected to the second force limiting assembly 4. As the first force limiting assembly 3 rotates, the second force limiting assembly 4 is driven to twist and deform in the first direction, so as to achieve the force limitation of the seat belt buckle. That is, the structure adopted by the seat belt buckle provided by the present application is simple and the manufacturing cost is relatively low. While realizing the functions of connecting and restraining the seat belt, it can also provide a force limiting function for the connected seat belt, thereby further enhancing the safety protection for passengers.

[0071] The present application further provides a seat, including a seat main body and the seat belt buckle as described above. The positioning assembly 5 of the seat belt buckle can be fixedly connected to the seat main body. For the specific structure of the seat belt buckle, reference can be made to the description of the above embodiments, and details will not be repeated here.

[0072] The present application further provides a vehicle, including: a vehicle main body and the seat as described above, and the seat is arranged in the vehicle main body. The seat includes a seat main body and the seat belt buckle as described above. For the specific structure of the seat belt buckle, reference can be made to the description of the above embodiments, and details will not be repeated here.

[0073] It should be noted that although several structures, components or units for realizing related functions are mentioned in the above detailed description, this division is not mandatory. In fact, according to the specific implementation manners of the present application, the features and functions of two or more of the above-described structures, components or units can be embodied in one structure, component or unit. Conversely, the features and functions of one structure, component or unit described above can be further divided and embodied by multiple components, structures or units.

[0074] In addition, although the various components of the components or devices in the present application and the installation manners between the components are described in a specific order in the accompanying drawings, this does not require or imply that the components or devices must be designed in accordance with the specific components or the installation manners between the components, or that all the shown components must be included to achieve the desired result. Additionally or alternatively, some components may be omitted, multiple components may be combined into one component to achieve the corresponding function, and / or one component may be decomposed into multiple components to achieve the corresponding function, etc.

[0075] Although the present application is disclosed above with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the scope defined by the claims of the present application.

Claims

1. A seat belt buckle, characterized in that: include: A locking assembly, a connecting rope, a first force limiting assembly, a second force limiting assembly and a positioning assembly; The buckle assembly is connected to the first end of the connecting rope; the buckle assembly can be plugged into the locking tongue of the safety belt; The second end of the connecting rope is wound around the first force-limiting component, and the first force-limiting component is movably connected to the positioning component; the second force-limiting component is fixedly connected to the positioning component and connected to the first force-limiting component; The connecting rope can drive the first force limiting component to rotate along the first direction under the action of the lock component, and the second force limiting component can be driven to twist and deform along the first direction as the first force limiting component rotates, so as to limit the force of the seat belt buckle; The positioning assembly is fixedly connected to the seat to support the first force limiting assembly and the second force limiting assembly.

2. The seat belt buckle according to claim 1, characterized in that: The positioning assembly includes a locking side plate, a connecting side plate, a first connecting hole, a second connecting hole and a first riveting assembly; The locking side plate and the connecting side plate are arranged opposite to each other, the locking side plate and the connecting side plate are respectively provided with a bending portion, and are connected by the first riveting assembly to form a force limiting space; the first force limiting assembly and the second force limiting assembly are connected along a connecting direction and are limited in the force limiting space; the connecting direction is the direction in which the locking side plate and the connecting side plate are opposite to each other; The first connecting hole is arranged on the locking side plate, and the second force limiting component is fixedly connected to the first connecting hole; The second connection hole is arranged on the connection side plate, and the first connection hole is opposite to the second connection hole; the first force limiting component is movably connected to the second connection hole.

3. The seat belt buckle according to claim 2, characterized in that: The positioning assembly also includes a second riveting assembly, a transfer bracket, and a bolt assembly; The second riveting assembly connects the locking side plate, the connecting side plate and the adapter bracket; The adapter bracket is arranged vertically to the locking side plate and the connecting side plate; The adapter bracket is fixedly connected to the seat via the bolt assembly.

4. The seat belt buckle according to claim 2, characterized in that: The first force-limiting assembly comprises: a crimping joint, a core shaft, a connecting boss, a clamp, a connecting structure and a limiting structure; The connecting boss is arranged on the outer side of the core shaft along the axial direction of the core shaft, and the connecting boss is movably connected to the second connecting hole; The limiting structure is arranged on the inner side of the core shaft along the axial direction of the core shaft, and the limiting structure is connected to the second force limiting component; The connecting structure is arranged on the core shaft along the circumferential direction of the core shaft, and the connecting rope is connected to the connecting structure to be wound around the core shaft; The connecting end of the clamp is connected to the first riveting assembly so that the clamp is half-wrapped relative to the circumferential end surface of the mandrel, and the clamp plays a supporting and limiting role for the connecting rope; The crimping head is connected to the end of the connecting rope so as to abut against and be restricted by the connecting structure after the connecting rope is driven along the first direction.

5. The seat belt buckle according to claim 4, characterized in that: The connection structure includes a receiving cavity, an annular groove and a through hole; The accommodating cavity is arranged to be recessed in the circumferential end surface of the core shaft along the radial direction of the core shaft, and when the crimping head is accommodated in the accommodating cavity, the crimping head is placed inside the core shaft; The annular groove is provided on a portion of the outer circumferential end surface of the core shaft along the circumferential direction of the core shaft; The through hole passes through the accommodating cavity and the annular groove. The connecting rope is wound around the annular groove along the second direction and passes through the through hole so that the end of the connecting rope is connected to the crimping joint. The crimping joint abuts against and is restricted by the cavity wall of the accommodating cavity after the connecting rope is driven along the first direction. The second direction is opposite to the first direction.

6. The seat belt buckle according to claim 4, characterized in that: The connection structure includes a limiting boss, a containing cavity, an annular groove and a through hole; The limiting boss is protrudingly arranged on a portion of the outer circumferential end surface of the mandrel and is integrally formed with the mandrel; The accommodating cavity is arranged to be recessed in the circumferential end surface of the core shaft along the radial direction of the core shaft, and when the crimping head is accommodated in the accommodating cavity, the crimping head is placed inside the core shaft; The annular groove is provided on part of the outer circumferential end surface of the core shaft and the outer circumferential end surface of the limiting boss along the circumferential direction of the core shaft; The through hole passes through the accommodating cavity and the annular groove, and the connecting rope is wound around the annular groove from the limiting boss along the second direction and then passes through the through hole so that the end of the connecting rope is connected to the crimping joint; the crimping joint abuts against and is restricted by the cavity wall of the accommodating cavity after being driven by the connecting rope along the first direction; the second direction is opposite to the first direction.

7. The seat belt buckle according to claim 4, characterized in that: The limiting structure includes a containing hole, a first internal spline, a first sinker and a second sinker; The receiving hole is arranged on the inner side of the core shaft along the axial direction of the core shaft; The first internal spline, the first countersunk platform, and the second countersunk platform are sequentially arranged in the accommodating hole along an axial direction away from the connecting boss.

8. The seat belt buckle according to claim 7, characterized in that: The second force-limiting component includes: a shaft head and a torsion bar; The first end of the shaft head is fixedly connected to the first connecting hole; The second end of the shaft head is accommodated in the second sinker, and is connected to the first end of the torsion bar, and fixes the first end of the torsion bar; The rod body of the torsion rod is accommodated in the first sinker, and the second end of the torsion rod is connected to the first internal spline to fix the second end of the torsion rod.

9. A seat, characterized in that: It comprises a seat body and a seat belt buckle as described in any one of claims 1 to 8; the positioning component of the seat belt buckle can be fixedly connected to the seat body.

10. A vehicle, characterized in that: include: A vehicle body and a seat as claimed in claim 9, wherein the seat is arranged in the vehicle body.

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