Seat belt height adjustment mechanism

Abstract

The present invention provides a seat belt height adjustment mechanism, comprising an adjustment cover, a mounting bracket, a sliding assembly, a height plastic limiter and a seat belt guide ring. The sliding assembly is slidably mounted on the front of the mounting bracket from top to bottom and can slide up and down along the mounting bracket. The seat belt guide ring is fixed to the sliding assembly by bolts. The adjustment cover is buckled on the sliding assembly. A part of the adjustment cover covers the seat belt guide ring. The adjustment cover and the sliding assembly slide up and down synchronously. The adjustment cover is used for the driver or the passenger. The height plastic limiter is connected to the mounting bracket from the back of the mounting bracket to limit the sliding assembly. While meeting regulatory requirements, the present invention reduces design redundancy caused by the height being raised and still subject to regulatory requirements, so that the seat belt height adjustment mechanism is developed in the direction of lightweight and cost reduction.

Description

Technical Field

[0001] The present invention relates to the technical field of seat belts, and more specifically, to a seat belt height adjustment mechanism. Background Art

[0002] Due to regulatory requirements, existing seat belt height adjustment mechanisms usually need to meet strength requirements at each height adjustment position. However, in real life, when a car accident occurs, the seat belt will only play a role in strength when it is in the lowest position. Therefore, the seat belt only needs to meet the strength requirements at the lowest position. However, during the design process of existing seat belt height adjustment mechanisms, because each height adjustment position needs to meet the strength requirements, the design is redundant, thereby increasing the weight of the seat belt height adjustment mechanism, which is not conducive to the development in the direction of lightweighting and cost reduction. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide a seat belt height adjustment mechanism to solve the problems of heavy weight and redundant design of the existing seat belt height adjustment mechanism.

[0004] The seat belt height adjustment mechanism provided by the present invention comprises an adjustment cover, a mounting bracket, a sliding assembly and a height plastic limiter; wherein the sliding assembly comprises a mounting cover, a slide groove, a positioning pin and a compression spring, the slide groove is fixed on the back side of the mounting cover, a mounting seat is fixed on the front side of the mounting cover, the adjustment cover is buckled on the mounting seat and fixed to the mounting cover, a mounting groove is provided in the mounting seat, the compression spring is installed in the mounting groove, one end of the positioning pin abuts against the compression spring, and the other end extends out of the mounting groove and passes through the slide groove, and limiting protrusions extending out of the mounting groove and clamped with the adjustment cover are respectively protruded at two ends along the diameter of one end of the positioning pin located in the mounting groove; a slideway for the slide groove to slide is provided on the front side of the mounting bracket, the height plastic limiter is clamped with the mounting bracket from the back side of the mounting bracket, and at least two interconnected limiting holes for limiting the positioning pin are provided on the height plastic limiter.

[0005] In addition, a preferred structure is that a lubricating gap-eliminating member is installed in the slide groove, one side of the lubricating gap-eliminating member is in contact with the slide groove, and the other side is in contact with the mounting bracket.

[0006] In addition, a preferred structure is that the seat belt height adjustment mechanism also includes a seat belt guide ring, a through hole for installing bolts is opened on the seat belt guide ring, and through holes for installing nuts are opened on the lubrication and gap elimination member, the slide groove and the installation cover respectively, and the seat belt guide ring is fixed to the installation cover through the cooperation of the nut and the bolt, and a part of the adjustment cover is buckled on the seat belt guide ring.

[0007] Furthermore, a preferred structure is that two rows of protruding teeth are provided on the height plastic limiter, and two rows of notches are opened on the mounting bracket at positions corresponding to the protruding teeth, and the protruding teeth slide downwards and engage with the corresponding notches.

[0008] By utilizing the seat belt height adjustment mechanism of the present invention, the height of the seat belt guide ring is changed by the position of the positioning pin in different limiting holes, so that the driver and the passenger can adjust the height position of the seat belt according to their height, and the most comfortable and optimal state for wearing the seat belt can be achieved; in the event of a collision, the height plastic limiting piece will undergo elastic deformation, the positioning pin will drop to the lowest limiting hole, and the seat belt guide ring will drive the seat belt to drop to the lowest position to protect the occupants; the seat belt height adjustment mechanism, while meeting regulatory requirements, reduces design redundancy caused by the height being raised but still subject to regulatory requirements, and develops the seat belt height adjustment mechanism in the direction of lightweighting and cost reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more clear and easy to understand. In the accompanying drawings:

[0010] Figure 1 is a schematic diagram of the overall structure of a seat belt height adjustment mechanism according to an embodiment of the present invention;

[0011] Figure 2 is a schematic diagram of the exploded structure of a seat belt height adjustment mechanism according to an embodiment of the present invention;

[0012] Figure 3 is a front structural schematic diagram of a sliding assembly according to an embodiment of the present invention;

[0013] Figure 4 is a front exploded structural schematic diagram of a sliding assembly according to an embodiment of the present invention;

[0014] Figure 5 Schematic diagram of the back structure of a sliding assembly according to an embodiment of the present invention.

[0015] The accompanying drawings include: adjustment cover 1, mounting bracket 2, slide 21, notch 22, bolt fixing hole 23, avoidance hole 24, sliding assembly 3, mounting cover 31, welding part 311, slide groove 32, positioning pin 33, limiting protrusion 331, compression spring 34, mounting seat 35, nut 36, lubrication and clearance eliminating part 37, height plastic limiting part 4, protruding tooth 41, limiting hole 42, seat belt guide ring 5, bolt 6. DETAILED DESCRIPTION

[0016] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0017] Figure 1 and Figure 2 They are respectively the overall structure and the decomposed structure of the seat belt height adjustment mechanism according to an embodiment of the present invention.

[0018] like Figure 1 and Figure 2 As shown, the seat belt height adjustment mechanism provided by the embodiment of the present invention includes:

[0019] An adjustment cover 1, a mounting bracket 2, a sliding component 3, a height plastic limiter 4 and a seat belt guide ring 5. The sliding component 3 is slidably installed on the front side of the mounting bracket 2 from top to bottom and can slide up and down along the mounting bracket 2. The seat belt guide ring 5 is fixed to the sliding component 3 by bolts 6. The adjustment cover 1 is buckled on the sliding component 3. A part of the adjustment cover 1 covers the seat belt guide ring 5. The adjustment cover 1 and the sliding component 3 slide up and down synchronously. The adjustment cover 1 is used for the driver or passengers; the height plastic limiter 4 is clamped with the mounting bracket 2 from the back side of the mounting bracket 2 to limit the sliding component 3.

[0020] Figure 3-Figure 5 The front structure, front exploded structure and back structure of the sliding assembly according to the embodiment of the present invention are respectively shown.

[0021] like Figure 3-Figure 5 As shown together, the sliding assembly 3 includes a mounting cover 31, a welding portion 311, a slide groove 32, a positioning pin 33, a compression spring 34, a mounting seat 35 and a nut 36. The slide groove 32 is fixed to the back of the mounting cover 31, the slide groove 32 slides on the mounting bracket 2, and the mounting seat 35 is fixed to the front of the mounting cover 31. The mounting seat 35 and the mounting cover 31 can be fixed together by welding or the like. The mounting seat 35 and the mounting cover 31 can also be an integrally formed structure. A mounting groove is provided in the mounting seat 35, and the compression spring 34 is installed in the mounting groove. One end of the positioning pin 33 abuts against the compression spring 34, and the other end of the positioning pin 33 extends out of the mounting groove and passes through the slide groove 32; limiting protrusions 331 are respectively protruded at both ends along the diameter of the end where the positioning pin 33 abuts against the compression spring 34, and the limiting protrusion 331 extends out of the mounting groove and is snapped with the adjustment cover 1, so that the adjustment cover 1 is snapped on the sliding assembly 3.

[0022] Since both the slide groove 32 and the mounting bracket 2 are made of metal, the slide groove 32 slides on the mounting bracket 2, which will inevitably cause wear between the slide groove 32 and the mounting bracket 2. In order to prevent the slide groove 32 from directly contacting the mounting bracket 2, a lubricating gap eliminating member 37 is installed in the slide groove 32. The lubricating gap eliminating member 37 can play two roles. One role is to prevent wear between the slide groove 32 and the mounting bracket 2, and the other role is to eliminate the gap between the slide groove 32 and the mounting bracket 2. One end of the locating pin 33 extends out of the mounting groove and passes through the lubricating gap eliminating member 37.

[0023] In order to enable the positioning pin 33 to pass through the lubricating gap eliminating member 37 , through holes are respectively provided on the lubricating gap eliminating member 37 and the slide groove 32 at positions corresponding to the positioning pin 33 .

[0024] Combination Figure 4 and Figure 2 The safety belt guide ring 5 is fixed to the sliding assembly 3 by the bolt 6 and the nut 36. Through holes for installing the nut 36 are respectively provided on the installation cover 31, the slide groove 32 and the lubricating gap eliminating member 37.

[0025] When assembling the sliding assembly 3, first, assemble the nut 36 to the slide groove 32 by welding or riveting; then, assemble the positioning pin 33 and the compression spring 34 into the mounting cover 31, and then weld the mounting cover 31 to the slide groove 32 through the welding portion 311 on the mounting cover 31; finally, assemble the lubricating gap eliminating member 37 into the slide groove 32.

[0026] A slideway 21 is provided on the front side of the mounting bracket 2 , and the slideway 21 allows the slide groove 32 to slide up and down. The sliding assembly 3 is slidably installed on the mounting bracket 2 through the slide groove 32 .

[0027] The height plastic limiter 4 is evenly distributed with protruding teeth 41 on both side edges along the width direction, and a slot is formed between the protruding teeth 41 and the body of the height plastic limiter 4. A notch 22 is opened on the mounting bracket 2 corresponding to the position of each protruding tooth 41, and a snap-fitting portion is formed between two adjacent notches 22. When installing the height plastic limiter 4, first align the protruding teeth 41 with the notches 22, and then slide the height plastic limiter 4 downward so that the snap-fitting portion is snapped into the corresponding slot, thereby installing the height plastic limiter 4 on the mounting bracket 2.

[0028] Bolt fixing holes 23 are respectively provided on the mounting bracket 2 and the height plastic limiter 4 for bolt fixing. After the height plastic limiter 4 is installed on the mounting bracket 2, the height plastic limiter 4 is fixed to the mounting bracket 2 by bolts.

[0029] A long strip-shaped avoidance hole 24 is provided on the mounting bracket 2 at a position corresponding to the limiting hole 42 , so that the positioning pin 33 can be inserted into the limiting hole 42 .

[0030] In order to achieve the limitation of the positioning pin 33 by the height plastic limiter 4, at least two connected limiting holes 42 are opened on the height plastic limiter 4 for limiting the positioning pin 33. The width of the gap between two adjacent limiting holes 42 is smaller than the width of the positioning pin 33 to prevent the positioning pin 33 from sliding from one limiting hole 42 to another limiting hole 42. When adjusting the height of the seat belt guide ring 5, the adjustment cover 1 is pulled outward to make the positioning pin 33 withdraw from the limiting hole 42, and then the position of the adjustment cover 1 is adjusted. The adjustment cover 1 drives the positioning pin 33 to move up and down. After adjusting the adjustment cover 1, the adjustment cover 1 is released, and the positioning pin 33 is reinserted into the limiting hole 42 under the action of the compression spring 34 to achieve the locking of the sliding assembly 3.

[0031] The height plastic limiter 4 is a plastic part. The purpose of using plastic material is that when a car accident occurs, the height plastic limiter 4 can produce elastic deformation, and the gap between two adjacent limit holes 42 will become wider, causing the positioning pin 33 to drop to the lowermost limit hole 42, thereby lowering the seat belt guide ring 5 to the lowest position, that is, the seat belt returns from the high position to the lowest position, exerting its strength effect and protecting the driver or passengers.

[0032] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A seat belt height adjustment mechanism, characterized in that: It includes an adjustment cover, a mounting bracket, a sliding assembly and a height plastic limiter; wherein, The sliding assembly comprises a mounting cover, a slide groove, a positioning pin and a compression spring, the slide groove being fixed to the back side of the mounting cover, a mounting seat being fixed to the front side of the mounting cover, the adjustment cover being buckled on the mounting seat, a mounting groove being provided in the mounting seat, the compression spring being installed in the mounting groove, one end of the positioning pin being in contact with the compression spring, and the other end extending out of the mounting groove and passing through the slide groove, and limiting protrusions extending out of the mounting groove and engaging with the adjustment cover are respectively protruded at two ends along the diameter of one end of the positioning pin located in the mounting groove; A slideway for the slide groove to slide is arranged on the front of the mounting bracket, the height plastic limiter is clamped with the mounting bracket from the back of the mounting bracket, and at least two interconnected limit holes for limiting the positioning pin are opened on the height plastic limiter; A lubricating gap-eliminating member is installed in the slide groove, one side of the lubricating gap-eliminating member is in contact with the slide groove, and the other side of the lubricating gap-eliminating member is in contact with the mounting bracket; Two rows of protruding teeth are arranged on the height plastic limiter, and two rows of notches are opened on the mounting bracket at positions corresponding to the protruding teeth, and the protruding teeth slide downward to engage with the corresponding notches, wherein protruding teeth are evenly distributed on the two side edges along the width direction of the height plastic limiter, and a slit is formed between the protruding teeth and the height plastic limiter body, and a notch is opened on the mounting bracket at a position corresponding to each protruding tooth, and a clamping part is formed between two adjacent notches. When installing the height plastic limiter, the protruding teeth are first aligned with the notches, and then the height plastic limiter is slid downward to make the clamping part engage in the corresponding slit, thereby installing the height plastic limiter on the mounting bracket.

2. The seat belt height adjustment mechanism according to claim 1, characterized in that: It also includes a seat belt guide ring, on which a through hole for installing a bolt is opened, and on the lubricating gap-eliminating member, the slide groove and the installation cover are respectively opened through holes for installing a nut, and the seat belt guide ring is fixed to the installation cover through the cooperation of the nut and the bolt, and a part of the adjustment cover is buckled on the seat belt guide ring.

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