A seat belt for a vehicle

Abstract

The utility model relates to a safety belt technical field discloses a kind of vehicle safety belts, including safety belt body and the lock tongue of being sleeved on safety belt body, lock tongue one side is outwardly convex and forms locking block, locking block is opened and has locking hole, lock tongue middle part is opened and has guide hole, lock tongue is opened and has accommodating groove, accommodating groove is located in the side of guide hole and is away from locking hole and is communicated with guide hole, accommodating groove opening is equipped with first rolling mechanism;The inside of first rolling mechanism is equipped with buffer mechanism, and buffer mechanism includes the first elastic element being arranged between slider and accommodating groove groove bottom;By setting first rolling mechanism, first, the arc surface contact between safety belt body and first roller is formed, can disperse load to greater contact area, reduce contact stress;Second, first roller rotates under the action of external force, so that the rolling friction between first roller and safety belt body is formed, to reduce the wear between the two, prolong the service life of safety belt body.

Description

Technical Field

[0001] This utility model belongs to the field of seat belt technology, specifically relating to a vehicle seat belt. Background Technology

[0002] Seat belts are one of the most basic and important passive safety devices in a car. Their main function is to restrain occupants when a collision or sudden braking occurs, preventing them from being thrown forward by inertia into hard objects inside the car (such as the steering wheel, dashboard, and windshield) or from being ejected from the car, thereby significantly reducing the risk of injury or even death to occupants.

[0003] The locking tongue is a crucial metal connecting component in the seat belt system. The flat, block-shaped locking tongue has guide holes through which the seat belt passes, allowing the two to slide together. The locking tongue is inserted into and locked into the buckle on the inside of the seat, together forming a restraint ring to withstand impact loads.

[0004] During daily adjustments and in the locked state, friction occurs between the latch and the seat belt. Over time, the fabric seat belt will inevitably wear down, its tensile strength will decrease, and in severe cases, the seat belt will break, rendering its safety function ineffective and threatening the user's personal safety. Moreover, the surface of the seat belt will gradually become rough under friction, which is not conducive to the sliding adjustment of the latch. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a vehicle seat belt to solve the technical problem in the prior art where the seat belt body and the locking tongue are worn or even broken due to long-term friction.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A vehicle seat belt includes a seat belt body and a locking tongue sleeved on the seat belt body. One side of the locking tongue protrudes outward to form a locking block, and the locking block has a locking hole. A guide hole is formed in the middle of the locking tongue, and a receiving groove is formed inside the locking tongue. The receiving groove is located on the side of the guide hole opposite to the locking hole and is connected to the guide hole. A first rolling mechanism is provided at the opening of the receiving groove. The first rolling mechanism includes a slider that is slidably connected to the receiving groove. Support plates are provided at both ends of the slider facing the locking hole. A first connecting shaft is fixedly connected between the two support plates. A first roller is sleeved around the first connecting shaft. A buffer mechanism is provided inside the first rolling mechanism. The buffer mechanism includes a first elastic element disposed between the slider and the bottom of the receiving groove.

[0008] Furthermore, the first roller and the first connecting shaft are rotatably connected by a first bearing;

[0009] Furthermore, the buffer mechanism also includes rectangular buffer grooves opened on both sides above the receiving groove. The buffer grooves are connected to the receiving groove. Extension blocks are welded on both sides of the bottom of the slider. The extension blocks extend along the length of the latch until they are directly below the buffer groove. A sealing plate is provided at the opening of the buffer groove. A sliding rod is provided inside the buffer groove. A through hole is opened at the center of the sealing plate. The inner diameter of the through hole is the same as the diameter of the sliding rod. One end of the sliding rod passes through the through hole on the sealing plate and extends along the width of the latch until it contacts the extension block. A limiting plate is fixedly connected to the other end of the sliding rod. The limiting plate is located inside the buffer groove. Its diameter is larger than the diameter of the sliding rod. A second elastic element is provided between the limiting plate and the sealing plate.

[0010] Furthermore, the second elastic element is a spring, which is sleeved around the sliding rod;

[0011] Furthermore, sliding limit components are provided on both sides of the slider. The sliding limit components include a rotating shaft that is fixedly connected to the wall of the receiving groove. A cylinder is sleeved around the rotating shaft. The inner diameter of the cylinder is the same as the outer diameter of the rotating shaft, and the two are rotatably connected.

[0012] The beneficial effects of this utility model are as follows:

[0013] (1) Compared with the prior art, by setting the first rolling mechanism, firstly, the seat belt body and the first roller form an arc surface contact. On the one hand, the arc surface contact can distribute the load to a larger contact area and reduce the contact stress; on the other hand, the arc surface contact can realize continuous and smooth force transmission and avoid the impact or sudden change of the planar contact. Secondly, the first roller rotates under the action of external force, so that the first roller and the seat belt body form rolling friction, thereby reducing the wear between the two, preventing the seat belt body from breaking suddenly, and effectively extending the service life of the seat belt body.

[0014] (2) By setting up a buffer mechanism, under the influence of factors such as road bumps and user's own sitting posture adjustment, the seat belt body applies intermittent pressure to the first roller. When the first roller is compressed, the slider slides towards the receiving groove. At this time, the first elastic element and the second elastic element are compressed by force, which buffers the sliding of the slider, thereby reducing the peak pressure of the seat belt body on the user and improving the user's riding comfort. Attached Figure Description

[0015] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0016] Figure 1 This is an overall schematic diagram of the vehicle seat belt in Embodiment 1 of this utility model;

[0017] Figure 2 This is a schematic diagram of the locking tongue in Embodiment 1 of this utility model;

[0018] Figure 3 for Figure 2 Enlarged view at point A1;

[0019] Figure 4 This is a cross-sectional view of the locking tongue in Embodiment 1 of this utility model;

[0020] Figure 5 for Figure 4 Enlarged view at point A2;

[0021] Figure 6 for Figure 4 Enlarged view at point A3;

[0022] Figure 7 for Figure 4 Enlarged view at A4 in the middle.

[0023] The following labels are shown in the attached diagram:

[0024] 1. Seat belt body, 2. Locking tongue, 201. Locking hole, 202. Guide hole, 203. Receiving groove, 204. Buffer groove, 3. First rolling mechanism, 301. Slider, 302. Support plate, 303. First connecting shaft, 304. First roller, 305. First bearing, 401. Buffer mechanism, 401. First elastic element, 402. Extension block, 403. Sealing plate, 404. Sliding rod, 405. Limiting plate, 406. Second elastic element, 407. Rotating shaft, 408. Detailed Implementation

[0025] Example 1, specifically as follows: Figures 1-7 As shown.

[0026] A vehicle seat belt includes a seat belt body 1 and a locking tongue 2 fitted onto the seat belt body 1.

[0027] like Figure 1 , Figure 2 As shown, the locking tongue 2 is generally in the shape of a cuboid plate, with one of its long sides protruding outward to form a locking block. The locking block has a locking hole 201. The locking tongue 2 is inserted and locked into the buckle on the inside of the seat through the locking hole 201, together forming a constraint ring to withstand impact loads.

[0028] A rectangular guide hole 202 is formed in the middle of the latch 2. The length direction of the guide hole 202 is consistent with the length direction of the latch 2. The seat belt body 1 passes through the guide hole 202 and forms a sliding connection with the latch 2. A receiving groove 203 is formed inside the latch 2. The receiving groove 203 is located on the side of the guide hole 202 opposite to the locking hole 201 and is connected to the guide hole 202. The connection between the receiving groove 203 and the guide hole 202 forms a meeting surface. It should be further noted that the length of the receiving groove 203 is greater than the length of the guide hole 202.

[0029] A first rolling mechanism 3 is provided at the opening of the receiving groove 203. The first rolling mechanism 3 includes a slider 301 that is slidably connected to the receiving groove 203. The cross-sectional dimensions of the slider 301 are the same as the dimensions of the intersecting surface. Support plates 302 are welded to both ends of the slider 301 facing the locking hole 201. A first connecting shaft 303 is fixedly connected between the two support plates 302. The axial direction of the first connecting shaft 303 is consistent with the length direction of the locking tongue 2. A first roller 304 is sleeved around the first connecting shaft 303. The first roller 304 and the first connecting shaft 303 are rotatably connected through a first bearing 305. There is a gap between the first roller 304 and the slider 301. Specifically, the first bearings 305 are evenly distributed along the length direction of the first connecting shaft 303. The inner ring of the first bearing 305 is interference-fitted with the first connecting shaft 303, and the outer ring of the first bearing 305 is interference-fitted with the first roller 304.

[0030] The inner side of the first rolling mechanism 3 is provided with a buffer mechanism 4. The buffer mechanism 4 includes a first elastic element 401 disposed between the slider 301 and the bottom of the receiving groove 203. The first elastic element 401 provides elastic support for the slider and the first roller 304. The first elastic elements 401 are distributed at intervals along the length direction of the slider 301 and the extension direction of the first elastic elements 401 is consistent with the width direction of the latch 2. In this embodiment, the first elastic element 401 is a spring. One end of the spring is welded and fixed to the inner side of the slider 301, and the other end of the spring is welded and fixed to the bottom of the receiving groove 203.

[0031] The buffer mechanism 4 also includes rectangular buffer grooves 204 formed above both sides of the receiving groove 203. The buffer grooves 204 are connected to the receiving groove 203 and have the same width. Extension blocks 402 are welded to both sides of the bottom of the slider 301, extending along the length of the latch 2 to directly below the buffer groove 204. A sealing plate 403 is provided at the opening of the buffer groove 204, with a cross-sectional dimension matching the opening size of the buffer groove 204. A sliding rod 404 is provided inside the buffer groove 204. A through hole is formed at the center of the sealing plate 403, with an inner diameter matching the diameter of the sliding rod 404. One end of the sliding rod 404 passes through the through hole in the sealing plate 403 and extends along the width of the latch 2 until it contacts the extension block 402. The sliding rod 404 and the extension block 402 are fixedly welded together. A limiting plate 405 is fixedly connected to the other end of the sliding rod 404. The limiting plate 405 is located inside the buffer groove 204 and its diameter is larger than that of the sliding rod 404. A second elastic element 406 is provided between the limiting plate 405 and the sealing plate 403. The second elastic element 406 is also a spring. The spring is sleeved around the sliding rod 404, and the two ends of the spring are welded and fixed to the limiting plate 405 and the sealing plate 403 respectively.

[0032] It is worth emphasizing that, whether in the locking process or in use, the slider 301 is supported by the first elastic element 401 and the second elastic element 406, so that the whole or part of the first roller 304 is always inside the guide hole 202.

[0033] To prevent the slider 301 from shifting during sliding, in this embodiment, sliding limit components are provided on both sides of the slider 301. In this embodiment, two sliding limit components are spaced apart on one side of the slider 301. Each sliding limit component includes a rotating shaft 407 welded and fixed to the wall of the receiving groove 203. A cylinder 408 is sleeved around the rotating shaft 407, and the inner diameter of the cylinder 408 is the same as the outer diameter of the rotating shaft 407; the two are rotatably connected. The slider 301 remains in contact with the sliding limit components during sliding, and the sliding limit components provide support for the slider 301, thereby preventing the slider 301 from shifting.

[0034] During the locking process, the locking tongue 2 needs to be pulled to bring it close to the buckle on the inside of the seat. After the locking tongue 2 and the buckle are locked, the seat belt enters the use state. Whether in the locking process or in the use state, the seat belt body 1 and the side of the guide hole 202 opposite to the locking hole 201 are always in contact, and sliding friction inevitably occurs between the two.

[0035] By setting the first rolling mechanism 3, firstly, an arc-shaped contact is formed between the seat belt body 1 and the first roller 304. On the one hand, the arc-shaped contact can distribute the load to a larger contact area and reduce the contact stress; on the other hand, the arc-shaped contact can realize continuous and smooth force transmission and avoid the impact or sudden change of planar contact. Secondly, the first roller 304 rotates under the action of external force, so that the first roller 304 and the seat belt body 1 form rolling friction, thereby reducing the wear between the two, preventing the seat belt body 1 from breaking suddenly, and effectively extending the service life of the seat belt body 1.

[0036] By setting up a buffer mechanism 4, in the use state, due to factors such as road bumps and the user's own sitting posture adjustment, the seat belt 1 applies intermittent pressure to the first roller 304. When the first roller 304 is compressed, the slider 301 slides towards the receiving groove 203. At this time, the first elastic element 401 and the second elastic element 406 are compressed, which buffers the sliding of the slider 301, thereby reducing the peak pressure of the seat belt 1 on the user and improving the user's riding comfort. When the first roller 304 is not under pressure, the first elastic element 401 and the second elastic element 406 rebound, and the slider 301 returns to its original position.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A vehicle seat belt, comprising a seat belt body and a locking tongue sleeved on the seat belt body, wherein one side of the locking tongue protrudes outward to form a locking block, the locking block having a locking hole, and the locking tongue having a guide hole in the middle, characterized in that, The locking tongue has a receiving groove, which is located on the side of the guide hole away from the locking hole and is connected to the guide hole. A first rolling mechanism is provided at the opening of the receiving groove. The first rolling mechanism includes a slider that is slidably connected to the receiving groove. Support plates are provided at both ends of the slider facing the locking hole. A first connecting shaft is fixedly connected between the two support plates. A first roller is sleeved around the first connecting shaft. A buffer mechanism is provided inside the first rolling mechanism. The buffer mechanism includes a first elastic element disposed between the slider and the bottom of the receiving groove.

2. The vehicle seat belt according to claim 1, characterized in that, The first roller and the first connecting shaft are rotatably connected by the first bearing.

3. The vehicle seat belt according to claim 1, characterized in that, The buffer mechanism also includes rectangular buffer grooves opened on both sides above the receiving groove. The buffer grooves are connected to the receiving groove. Extension blocks are welded to both sides of the bottom of the slider. The extension blocks extend along the length of the latch until they are directly below the buffer groove. A sealing plate is provided at the opening of the buffer groove. A sliding rod is provided inside the buffer groove. A through hole is opened at the center of the sealing plate. The inner diameter of the through hole is the same as the diameter of the sliding rod. One end of the sliding rod passes through the through hole on the sealing plate and extends along the width of the latch until it contacts the extension block. A limit plate is fixedly connected to the other end of the sliding rod. The limit plate is located inside the buffer groove. Its diameter is larger than the diameter of the sliding rod. A second elastic element is provided between the limit plate and the sealing plate.

4. The vehicle seat belt according to claim 3, characterized in that, The second elastic element is a spring, which is sleeved around the sliding rod.

5. The vehicle seat belt according to claim 4, characterized in that, The slider is provided with sliding limit components on both sides. The sliding limit components include a rotating shaft that is fixedly connected to the wall of the receiving groove. A cylinder is sleeved around the rotating shaft. The inner diameter of the cylinder is the same as the outer diameter of the rotating shaft, and the two are rotatably connected.

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