Locking spring bolt

Abstract

The utility model relates to the field of safety belt structures in automobile parts, in particular to a locking spring bolt, which is characterized in that a spring bolt main body consists of a spring bolt base body, a spring bolt outer shell and a spring bolt inner shell, the spring bolt outer shell, the spring bolt inner shell and the spring bolt base body are each provided with a first penetrating opening and a second penetrating opening, and a braid can penetrate through the first penetrating opening and the second penetrating opening. When emergency braking is carried out, the resultant force of the braid shoulder strap and the waist strap is small, unnecessary locking blocking is not generated, and the normal use state is guaranteed; when collision occurs, the woven belt resultant force enables the rigid body sliding block to extrude the elastic arc-shaped frame to deform, and the locking mechanism is triggered; after the locking mechanism rotates, the strip-shaped protrusion of the rigid body abuts against the side wall of the spring bolt inner shell to clamp the braid and prevent the braid from moving, meanwhile, the elastic body deforms to block association between the shoulder strap and the waistband, the shoulder strap force is prevented from rising, and reliable spring bolt locking is achieved.

Description

Technical Field

[0001] The utility model relates to the field of seat belt structures in automotive parts, and particularly to a locking tongue. Background Art

[0002] With the rapid development of the automotive industry and the continuous improvement of road traffic safety requirements, the performance optimization of vehicle passive safety systems has become a key link in ensuring the life safety of drivers and passengers. As the core component of the vehicle passive safety system, the seat belt can effectively restrain the occupant's body during a collision accident and reduce the secondary collision injury caused by inertial force. However, the existing traditional seat belt tongues still have limitations in the restraint mechanism at the moment of vehicle collision.

[0003] When a vehicle collides, the driver and passengers will generate a huge forward impact force due to inertia. At this time, the force borne by the waist will increase rapidly. Although the traditional seat belt tongue can achieve the basic locking function, it is difficult to accurately control the seat belt tension in the waist area. When the impact force on the waist exceeds a certain threshold, the seat belt may slip within the tongue, resulting in excessive forward movement of the occupant's waist and leg areas towards the instrument panel, thereby increasing the risks of pelvic fracture, lumbar injury, and leg impact injury. A Chinese invention patent with the publication number CN107351810A discloses a seat belt tongue with a self-locking function, which can clamp the seat belt webbing by rotating a clamping block when the seat belt webbing is violently stressed to achieve the locking purpose. However, the above tongue structure still has some problems: 1. The structure is complex and the assembly process is difficult; 2. The locking function may fail after a violent collision and cannot be reused; 3. Contacting and locking the webbing through teeth is likely to damage the webbing.

[0004] Therefore, it is necessary to design a locking tongue with a simple structure and at the same time having a good locking function for the seat belt webbing. Summary of the Utility Model

[0005] In order to overcome the shortcomings of the above technical problems, the utility model provides a locking tongue.

[0006] The technical implementation scheme of the utility model is: a locking tongue, which includes a tongue body, a housing, a mounting shaft, an elastic arc-shaped frame, and a locking mechanism. The tongue body is composed of a tongue base body, a tongue outer shell and a tongue inner shell that are assembled together and cover the outside of the tongue base body. The tongue outer shell, the tongue inner shell, and the tongue base body are all provided with a first through-hole and a second through-hole for the seat belt webbing to pass through. A housing that is mutually buckled is arranged on the tongue inner shell. Fixed blocks are symmetrically arranged on both sides of the tongue inner shell. A mounting shaft is arranged between the groove ends of the fixed blocks. An elastic arc-shaped frame is arranged on the mounting shaft. The elastic arc-shaped frame and the groove of the fixed block form a limiting hole for the locking mechanism to move, and the locking mechanism can rotate relative to the limiting hole formed by the elastic arc-shaped frame and the groove of the fixed block.

[0007] In a preferred embodiment of the utility model, the locking mechanism includes a rigid body, an elastic body, a sliding block, a clamping block and a positioning block. The sliding blocks are symmetrically arranged on both sides of the rigid body. The rigid body is slidably installed between the limiting holes formed by the grooves of the elastic arc frame and the fixed block through the sliding blocks. Clamping blocks are arranged on both sides of the straight surface of the elastic body. Clamping grooves are opened on both sides of the straight surface of the rigid body. Positioning blocks are arranged at intervals on the middle side of the straight surface of the elastic body. Positioning grooves are arranged at intervals on the middle side of the straight surface of the rigid body. The elastic body is clamped with the clamping grooves of the rigid body to form a whole through the clamping blocks, and the positioning blocks of the elastic body cooperate with the positioning grooves of the rigid body.

[0008] In a preferred embodiment of the utility model, the locking mechanism also includes a stabilizing block, which is symmetrically arranged on the middle side of the straight surface of the elastic body, and the stabilizing block is hook-shaped, and a stabilizing groove that cooperates with the stabilizing block of the elastic body is symmetrically opened on the middle side of the straight surface of the rigid body.

[0009] In a preferred embodiment of the present invention, the depth of the stabilizing groove of the rigid body is greater than the depth of the positioning groove of the rigid body.

[0010] In a preferred embodiment of the utility model, the outer wall of the rigid body is provided with a strip-shaped protrusion, and the webbing is clamped between the side wall of the inner shell of the lock tongue and the strip-shaped protrusion in the clamping state.

[0011] In a preferred embodiment of the utility model, a positioning pin is also included. The lock tongue shell is symmetrically provided with positioning pins capable of limiting and fixing the positioning holes of the lock tongue base.

[0012] In a preferred embodiment of the present utility model, the lock tongue outer shell and the lock tongue inner shell are injection molded parts, and the lock tongue base is a metal part.

[0013] In a preferred embodiment of the present invention, the lock tongue outer shell and the lock tongue inner shell are snap-connected.

[0014] In a preferred embodiment of the present invention, the rigid body has an arc-shaped smooth surface.

[0015] In a preferred embodiment of the utility model, the clamping position between the rigid body of the locking mechanism and the side wall of the inner shell of the lock tongue is provided with textures.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. When emergency braking occurs, the combined force of the webbing shoulder strap and waistband is small, and this device does not produce unnecessary locking and blocking, ensuring normal use. During a collision, the combined force of the webbing causes the rigid body sliding block to squeeze and deform the elastic arc-shaped frame, triggering the locking mechanism. After the locking mechanism rotates, the strip-shaped protrusion of the rigid body abuts against the side wall of the lock tongue inner shell to clamp the webbing and prevent it from moving. At the same time, the deformation of the elastic body blocks the connection between the shoulder strap and the waistband, avoiding the increase in shoulder strap force, achieving reliable lock tongue locking, effectively reducing the risk of harm to personnel during the collision, and providing strong protection for personnel safety.

[0018] 2. This device has good operability. After the external force is removed, the elastic body can automatically reset and drive the rigid body to reset, separating the strip-shaped protrusion of the rigid body from the side wall of the lock tongue inner shell, quickly restoring to the normal use state without affecting subsequent normal operations. When it is necessary to repair and replace the locking mechanism, the operation is very simple. Just disassemble the housing and remove the mounting shaft, and the locking mechanism can be easily removed, greatly saving maintenance time and cost and improving the practicality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0020] Figure 2 is a three-dimensional structural schematic diagram of the lock tongue main body of the present utility model.

[0021] Figure 3 is a three-dimensional structural schematic diagram of the lock tongue base body of the present utility model.

[0022] Figure 4 is a mounting structural schematic diagram of the locking mechanism of the present utility model.

[0023] Figure 5 is an exploded structural schematic diagram of the locking mechanism of the present utility model.

[0024] Markings in the drawings: 1 - lock tongue main body, 101 - lock tongue outer shell, 102 - lock tongue inner shell, 103 - lock tongue base body, 104 - first through hole, 105 - second through hole, 2 - housing, 3 - fixed block, 4 - mounting shaft, 5 - elastic arc-shaped frame, 6 - locking mechanism, 601 - rigid body, 602 - elastic body, 603 - sliding block, 604 - clamping block, 605 - clamping groove, 606 - positioning block, 607 - positioning groove, 608 - stable groove, 609 - stable block, 7 - positioning pin, 8 - positioning hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions of the present utility model will be further described below with reference to the accompanying drawings.

[0026] Embodiment: As Figures 1-5As shown, a locking bolt includes a bolt body 1, a shell 2, a mounting shaft 4, an elastic arc frame 5 and a locking mechanism 6. The bolt body 1 is composed of a bolt base 103 and a bolt shell 101 and a bolt inner shell 102 which are assembled together and covered on the outside of the bolt base 103. The bolt shell 101 and the bolt inner shell 102 are injection molded parts, and the bolt base 103 is a metal part. The bolt shell 101 and the bolt inner shell 102 have high assembly and fastening strength, and the bolt base 103 will not be pulled out. The bolt shell 101, the bolt inner shell 102 and the bolt base 103 are all provided with a first through hole 104 and a second through hole 105 for the webbing to pass through. The bolt inner shell 102 is provided with a shell 2 which is fastened to each other. , the inner shell 102 of the lock tongue is symmetrically provided with fixed blocks 3 on both sides, a mounting shaft 4 is provided between the groove ends of the fixed block 3, an elastic arc frame 5 is provided on the mounting shaft 4, the elastic arc frame 5 and the groove of the fixed block 3 form a limiting hole for the locking mechanism 6 to move, and the locking mechanism 6 can rotate relative to the limiting hole formed by the groove of the elastic arc frame 5 and the fixed block 3, and the locking mechanism 6 includes a rigid body 601, an elastic body 602, a sliding block 603, a card block 604, a positioning block 606 and a stabilizing block 609, the rigid body 601 has an arc smooth surface, and the arc smooth surface of the rigid body 601 is convenient for the passage of the webbing, and the sliding blocks 603 are symmetrically provided on both sides of the rigid body 601, and the rigid body 60 The elastic body 602 is slidably installed between the limiting holes formed by the grooves of the elastic arc frame 5 and the fixed block 3 through the sliding block 603. Blocks 604 are arranged on both sides of the straight surface of the elastic body 602. Slots 605 are opened on both sides of the straight surface of the rigid body 601. Positioning blocks 606 are arranged at intervals in the middle side of the straight surface of the elastic body 602. Positioning grooves 607 are arranged at intervals in the middle side of the straight surface of the rigid body 601. The elastic body 602 is connected to the slots 605 of the rigid body 601 through the block 604 to form a whole. The positioning block 606 of the elastic body 602 cooperates with the positioning groove 607 of the rigid body 601. Stabilizing blocks 609 are symmetrically arranged on the middle side of the straight surface of the elastic body 602. The stabilizing blocks 609 are hook-shaped. A stabilizing groove 608 cooperating with the stabilizing block 609 of the elastic body 602 is symmetrically opened on the middle side of the straight surface portion of the rigid body 601. The depth of the stabilizing groove 608 of the rigid body 601 is greater than the depth of the positioning groove 607 of the rigid body 601. The outer wall of the rigid body 601 is provided with a strip-shaped protrusion. The clamping position of the rigid body 601 of the locking mechanism 6 and the side wall of the lock tongue inner shell 102 is provided with texture. In the clamping state, the webbing is clamped between the side wall of the lock tongue inner shell 102 and the strip-shaped protrusion. The strip-shaped protrusion of the rigid body 601 and the texture of the side wall of the lock tongue inner shell 102 increase the clamping force on the webbing. The elastic body 602 ensures that during normal use and pulling, the side wall of the rigid body 601 and the lock tongue inner shell 102 are in a separated state.

[0027] like Figure 2 and Figure 3As shown in the figure, it further includes a positioning pin 7. The lock tongue housing 101 is symmetrically provided with a positioning pin 7 that can limit and fix the positioning hole 8 of the lock tongue base body 103. The positioning pin 7 is an injection molding pin, and the lock tongue base body 103 will not shift when pulled.

[0028] When an emergency brake occurs and the resultant force of the webbing shoulder strap and waistband is small, the sliding block 603 of the rigid body 601 is driven to rotate with a small amplitude, and the elastic arc-shaped frame 5 does not deform, so there is no locking and blocking effect. When a collision occurs, under the resultant force of the webbing shoulder strap and waistband, the sliding block 603 of the rigid body 601 presses the elastic arc-shaped frame 5, and the elastic arc-shaped frame 5 will be pressed and deformed. Under the action of the resultant force of the webbing, the locking mechanism 6 rotates in the limiting hole formed by the elastic arc-shaped frame 5 and the groove of the fixed block 3. The rigid body 601 and the elastic body 602 are inclined. After the rigid body 601 rotates, the strip-shaped protrusion abuts against the side wall of the lock tongue inner shell 102 to clamp the webbing and prevent the webbing from moving. The elastic body 602 deforms, and the locking mechanism 6 blocks the connection between the shoulder strap and the waistband, so that the shoulder strap force no longer rises, achieving the locking effect of the lock tongue, reducing and avoiding injuries to personnel during this process. When the external force is eliminated, the elastic body 602 resets and drives the rigid body 601 to reset. The strip-shaped protrusion of the rigid body 601 separates from the side wall of the lock tongue inner shell 102, and it returns to normal use. When replacement is needed, the housing 2 can be disassembled, the mounting shaft 4 can be removed, and then the locking mechanism 6 can be removed for repair and replacement.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A locking tongue, characterized in that, It includes a lock tongue body (1), and the lock tongue body (1) is composed of a lock tongue base body (103), a lock tongue outer shell (101) and a lock tongue inner shell (102) which are assembled together and wrap the outside of the lock tongue base body (103). The lock tongue outer shell (101), the lock tongue inner shell (102) and the lock tongue base body (103) are all provided with a first through hole (104) and a second through hole (105) for a webbing to pass through. A housing (2) that is mutually buckled is arranged on the lock tongue inner shell (102). Fixed blocks (3) are symmetrically arranged on both sides of the lock tongue inner shell (102). An installation shaft (4) is arranged between the groove ends of the fixed blocks (3). An elastic arc-shaped frame (5) is arranged on the installation shaft (4). A limiting hole for a locking mechanism (6) to move is formed between the elastic arc-shaped frame (5) and the groove of the fixed block (3), and the locking mechanism (6) can rotate relative to the limiting hole formed by the elastic arc-shaped frame (5) and the groove of the fixed block (3).

2. The locking tongue according to claim 1, characterized in that, The locking mechanism (6) includes a rigid body (601). Sliding blocks (603) are symmetrically arranged on both sides of the rigid body (601). The rigid body (601) is slidably installed between the limiting holes formed by the elastic arc-shaped frame (5) and the groove of the fixed block (3) through the sliding blocks (603). Blocks (604) are arranged on both sides of the straight part of the elastic body (602). Slots (605) are formed on both sides of the straight part of the rigid body (601). Positioning blocks (606) are arranged at intervals in the middle side position of the straight part of the elastic body (602). Positioning grooves (607) are arranged at intervals in the middle side position of the straight part of the rigid body (601). The elastic body (602) is integrally formed with the rigid body (601) by clamping the blocks (604) with the slots (605) of the rigid body (601), and the positioning blocks (606) of the elastic body (602) cooperate with the positioning grooves (607) of the rigid body (601).

3. A locking tongue according to claim 2, characterized in that, The locking mechanism (6) further includes a stabilizing block (609). The stabilizing blocks (609) are symmetrically arranged in the middle side of the straight part of the elastic body (602). The stabilizing blocks (609) are hook-shaped, and stabilizing grooves (608) that cooperate with the stabilizing blocks (609) of the elastic body (602) are symmetrically formed in the middle side of the straight part of the rigid body (601).

4. A locking tongue according to claim 3, characterized in that The depth of the stabilizing groove (608) of the rigid body (601) is greater than the depth of the positioning groove (607) of the rigid body (601).

5. A locking tongue according to claim 4, characterized in that Strip-shaped protrusions are arranged on the outer wall of the rigid body (601). When in the clamping state, the webbing is clamped between the side wall of the lock tongue inner shell (102) and the strip-shaped protrusions.

6. A locking tongue according to claim 5, characterized in that, It further includes a positioning pin (7). The lock tongue outer shell (101) is symmetrically provided with the positioning pin (7) that can limit and fix the positioning hole (8) of the lock tongue base body (103).

7. A locking tongue according to claim 6, characterized in that, The lock tongue outer shell (101) and the lock tongue inner shell (102) are injection molded parts, and the lock tongue base body (103) is a metal part.

8. A locking tongue according to claim 7, characterized in that, The lock tongue outer shell (101) and the lock tongue inner shell (102) are snap-connected.

9. A locking tongue according to claim 8, characterized in that, The rigid body (601) has a circular arc smooth surface.

10. A locking tongue according to claim 9, characterized in that, Textures are provided at the clamping position where the rigid body (601) of the locking mechanism (6) cooperates with the side wall of the lock tongue inner shell (102).

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