CN211493975U - Lock catch assembly for safety belt - Google Patents

Abstract

The utility model relates to a lock catch assembly for a safety belt, which comprises a shell for inserting a lock tongue, a locking mechanism arranged in the shell and a button for releasing locking; the locking mechanism comprises a pushing block matched with the lock tongue, a bolt machine rotatably arranged on the pushing block, a locking block for clamping the lock tongue and an inertia block for preventing the lock tongue from moving; the bolt machine pushes the lock block to lock the bolt through the movable lock rod; the middle part of the inertia block is connected with the shell through a rotating shaft protruding from the side surface; the inertia block forwards forms a buckling claw for buckling the lock rod and downwards forms a clamping claw for clamping the button; the buckling claw is thickened along the vertical direction; the root of the fastening claw is provided with a weight increasing block. Adopt the technical scheme of the utility model, the barycenter of whole inertia piece can antedisplacement to increase the distance of barycenter rather than the rotation axis, under lock state, the great inertia piece of torque can not take place the upset easily, can guarantee that the button can not take place to remove the condition of unblock, the security of whole hasp because of inertia.

Description

Lock catch assembly for safety belt

Technical Field

The utility model relates to a safety belt technical field of car, concretely relates to hasp assembly for safety belt.

Background

The safety belt is a basic protection device for protecting drivers and passengers in the collision process of the automobile. The whole safety belt protection device comprises a mesh belt, a retractor for taking in the mesh belt and a lock catch fixed on the seat. The lock tongue on the mesh belt is inserted into the lock catch, and passengers are fixed on the seat by the mesh belt, so that the situation that the passengers on the seat move forwards under the action of inertia when the automobile stops suddenly is avoided, and the passengers are prevented from leaning forwards and colliding.

The traditional lock catch generally comprises a shell, a pushing block linked with a lock tongue, a bolt machine rotationally arranged on the pushing block, a lock block for locking the lock tongue and a button for releasing the locking state; the bolt machine controls the locking block to lock or unlock the bolt by pushing the movable lock rod.

However, when the vehicle is suddenly stopped due to an accident, the button on the lock catch has inertia towards the unlocking direction, so that the lock tongue is unlocked, and the safety of the lock tongue is poor. In the prior art, a rotatable angular inertia block is additionally arranged in a lock catch, and one end of the inertia block is buckled with a lock rod and the other end of the inertia block is clamped with a button in a locking state; when the button moves towards the unlocking direction due to inertia, the inertia block can rotate towards the button direction to clamp the button, so that the button is prevented from moving and unlocking.

Because the structural design of current inertia piece is unreasonable, its barycenter is nearer from the rotation axis, and the quality is lighter, and the required moment of torsion of rotation is less, takes place the upset very easily, can not effectively prevent the button because of inertia takes place to remove the condition of unblock, and locking effect is poor, and the security of hasp can not be guaranteed.

Disclosure of Invention

For solving the aforesaid because of inertia piece rotates required moment of torsion little, take place the upset easily, lead to inertia piece can not effectively prevent the button because of inertia takes place to remove the problem of unblock, the utility model provides a hasp assembly for the safety belt, it is farther from the rotation axis with inertia briquetting barycenter design, form great rotation torque, can prevent the button because of inertia removes, and locking effect is good.

In order to achieve the purpose, the utility model adopts the technical proposal that:

a lock catch assembly for a safety belt comprises a shell for inserting a lock tongue, a locking mechanism arranged in the shell and a button for releasing locking; the locking mechanism comprises a pushing block matched with the lock tongue, a bolt machine rotatably arranged on the pushing block, a locking block for clamping the lock tongue and an inertia block for preventing the lock tongue from moving; the bolt machine pushes the lock block to lock the bolt through the movable lock rod; the middle part of the inertia block is connected with the shell through a rotating shaft protruding from the side surface; the inertia block forwards forms a buckling claw for buckling the lock rod and downwards forms a clamping claw for clamping the button; the buckling claw is thickened along the vertical direction; the root of the fastening claw is provided with a weight increasing block.

Adopt the technical scheme of the utility model, under the condition that hasp inner space allows, do the thickening through the knot claw with inertia piece in vertical direction and handle to add at its root and increase the pouring weight, with the anterior weight gain of inertia piece, the barycenter of whole inertia piece can antedisplacement, thereby increases the distance of barycenter rather than the rotation axis center, and the mass increase of inertia piece has great torque. In the locking state, after the locking rod is buckled by the buckling claw; the inertia block with large torque can not be easily overturned, the blocking effect on the button is good, and the condition that the button can not be moved and unlocked due to inertia and the safety of the whole lock catch can be guaranteed.

Preferably, the jaw extends from the rotational axis of the inertia block.

The root of the claw is positioned on the rotating shaft of the inertia block, so that the claw is close to the rotating shaft, and the mass center of the inertia block is favorably moved forwards.

Preferably, the number of the buckles and the number of the clamping jaws on the inertia block are two, so that a bilateral symmetry structure is formed.

The inertia block has a balanced structure, and the left and right formed buckling claws can buckle the lock rod from two ends to firmly buckle the lock rod.

Preferably, the weight increasing block is formed at the root part of the inner side of the two buckling claws.

The weight increasing block is formed between the two buckling claws, so that the interference of the weight increasing block with the movement of the whole inertia block can be avoided.

Preferably, the button is provided with a clamping groove for inserting a clamping claw on the inertia block.

When the inertia piece rotated, the jack catch stretched into the draw-in groove on the button, made the jack catch with the button chucking, can guarantee that the inertia piece effectively prevents the button and removes.

Preferably, the bolt machine comprises a connecting shaft which is arranged on the pushing block in a penetrating way; the connecting shaft and the pushing block of the bolt machine are provided with a mistake proofing groove and a mistake proofing boss which are matched with each other.

Because current bolt machine and piece are bilateral symmetry structure, in the installation, bolt the direction of machine and extremely easily adorn anti-reverse, set up mistake proofing structure on connecting axle and promotion piece, can avoid bolt the machine dress anti-reverse.

Preferably, the mistake proofing groove is formed in the connecting shaft; the mistake-proofing bulge is arranged on the pushing block; under the locking state, the mistake proofing arch offsets with the inner wall of mistake proofing groove, prevents to tie the machine and excessively overturn.

The limiting structure is formed between the mistake proofing protrusion and the mistake proofing groove, excessive overturning of the bolt machine is avoided, the structure is simple, the mounting space of the connecting shaft cannot be occupied, and mounting is convenient.

Preferably, the housing includes an installation groove for inserting the latch; the mounting groove is provided with a vibration-proof bulge and a vibration-proof elastic sheet which are used for clinging to the lock tongue; the anti-vibration protrusion and the anti-vibration elastic sheet are respectively fixed on the inner side walls opposite to the mounting grooves.

The utility model has the advantages that the inertia block has larger torque by increasing the distance between the mass center and the rotating axis, the blocking effect on the button is good, the button can be ensured not to be unlocked by moving due to inertia, and the safety of the whole lock catch is good; simple structure and convenient installation.

Drawings

Fig. 1 is a schematic structural diagram of the locking state of the present invention.

Fig. 2 is a schematic structural diagram of the unlocking state of the present invention.

Fig. 3 is a schematic diagram of an explosive structure.

Fig. 4 is an axial view of the inertia mass of the present invention.

Fig. 5 is a schematic structural diagram of an inertial mass in the prior art.

Fig. 6 is a front view of the inertia block of the present invention.

Fig. 7 is a schematic structural view of the bolt machine and the pushing block.

Fig. 8 is a schematic view of the structure at the housing.

Fig. 9 is a schematic structural view of the housing in a top view.

The reference numerals and components referred to in the drawings are as follows:

the bolt comprises a bolt 1, a shell 2, a button 3, a clamping groove 31, a pushing block 4, a bolt machine 5, a connecting shaft 51, an anti-error groove 52, a locking block 6, a locking rod 7, an inertia block 8, a rotating shaft 81, a buckling claw 82, a clamping jaw 83, a weight increasing block 84, an anti-error boss 9, a mounting groove 10, an anti-vibration bulge 11, an anti-vibration elastic sheet 12, a spring 13, a mass center 14 and a rotating axis 15.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

As shown in fig. 1 to 6, a buckle assembly for a seat belt includes a housing 2 into which a tongue 1 is inserted, a locking mechanism provided in the housing 2, and a button 3 for releasing locking; the locking mechanism comprises a pushing block 4 matched with the bolt 1, a bolt machine 5 rotatably arranged on the pushing block 4, a locking block 6 for clamping the bolt 1, a spring 13 for pushing the bolt machine 5 and an inertia block 8 for preventing the bolt 1 from moving; the bolt machine 5 pushes the lock block 6 to lock the bolt 1 through the movable lock rod 7; the middle part of the inertia block 8 is connected with the shell 2 through a rotating shaft 81 protruding from the side surface; the inertia block 8 is forward formed with a latch claw 82 for latching the lock lever 7, and downward formed with a claw 83 for latching the button 3; the buckling claw 82 is thickened along the vertical direction; the root of the pawl 82 is formed with a weight 84.

When the bolt clamping device is used, the bolt 1 is inserted into the shell 2, the bolt 1 abuts against the pushing block 4 and drives the pushing block 4 to move, the bolt machine 5 on the pushing block 4 starts to rotate under the pushing of the spring 13 and drives the lock rod 7 to drive the lock block 6 to move downwards, the bolt 1 is clamped, and the mesh belt with the bolt 1 is fixed. During the movement of the lock lever 7, the latch claw 82 of the inertia block 8 latches the lock lever 7, and the claw 83 approaches the push button 3 and clamps the push button 3, preventing the push button 3 from moving. The detailed structure and operation principle of the locking mechanism thereof are disclosed in patent document CN 102753050A.

Comparing the inertial mass 8 of fig. 6 of the present embodiment with the inertial mass 8 of fig. 4 of the prior art, the distance between the center of mass 14 of the inertial mass 8 and the rotation axis 81 of the present embodiment is significantly increased.

Wherein the pawl 83 extends from the pivot 81 of the inertia mass 8 in order to ensure that the centre of mass 14 of the inertia mass 8 is advanced. In order to ensure the balance of the inertia block 8, the number of the buckles and the claws 83 on the inertia block 8 is two, so that a bilateral symmetry structure is formed. And a weight increasing block 84 is formed at the root inside the two clasps 82. In order to ensure that the inertia block 8 stably clamps the button 3, the button 3 is provided with a clamping groove 31 for inserting a clamping claw 83 on the inertia block 8.

For convenient installation, the bolt machine 5 comprises a connecting shaft 51 which is arranged on the pushing block 4 in a penetrating way; the connecting shaft 51 and the pushing block 4 of the bolt machine 5 are provided with an error-proof groove 52 and an error-proof bulge 9 which are matched with each other. The anti-dislocation groove 52 is arranged on the connecting shaft 51; the mistake-proofing bulge 9 is arranged on the pushing block 4; in the locked state, the mistake proofing protrusion 9 abuts against the inner wall of the mistake proofing groove 52, and the bolt machine 5 is prevented from being overturned excessively.

In order to reduce noise, the shell 2 comprises an installation groove 10 for inserting the lock tongue 1; the mounting groove 10 is provided with a vibration-proof bulge 11 and a vibration-proof elastic sheet 12 which are tightly attached to the bolt 1; the anti-vibration protrusion 11 and the anti-vibration elastic sheet 12 are respectively fixed on the opposite inner side walls of the installation groove 10.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that other variations and modifications may be made without departing from the spirit and scope of the invention, and the scope of the invention is to be protected by the following claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. A lock catch assembly for a safety belt comprises a shell (2) for inserting a lock tongue (1), a locking mechanism arranged in the shell (2), and a button (3) for releasing locking; the locking mechanism comprises a pushing block (4) matched with the lock tongue (1), a bolt machine (5) rotatably arranged on the pushing block (4), a locking block (6) for clamping the lock tongue (1) and an inertia block (8) for preventing the lock tongue (1) from moving; the bolt machine (5) pushes the lock block (6) to lock the bolt (1) through the movable lock rod (7); the method is characterized in that: the middle part of the inertia block (8) is connected with the shell (2) through a rotating shaft (81) with a protruding side surface; the inertia block (8) is forward to form a buckling claw (82) for buckling the lock rod (7), and a clamping claw (83) for clamping the button (3) is downward formed; the buckling claw (82) is thickened along the vertical direction; the root of the fastening claw (82) is provided with a weight increasing block (84).

2. The seatbelt buckle assembly according to claim 1, wherein: the claw (83) extends from the rotating shaft (81) of the inertia block (8).

3. The buckle assembly for the safety belt as claimed in claim 2, wherein the inertia block (8) has two buckles and two claws (83) to form a bilateral symmetry structure.

4. The buckle assembly for the safety belt according to claim 3, wherein the weight (84) is formed at a root portion inside the two buckle claws (82).

5. The lock catch assembly for the safety belt as claimed in claim 1, wherein the button (3) is provided with a slot (31) for inserting a claw (83) on the inertia block (8).

6. The lock catch assembly for the safety belt according to claim 5, wherein the bolt machine (5) comprises a connecting shaft (51) inserted into the pushing block (4); the connecting shaft (51) and the pushing block (4) of the bolt machine (5) are provided with a mistake-proofing groove (52) and a mistake-proofing bulge (9) which are matched with each other.

7. The buckle assembly for the safety belt according to claim 6, wherein the anti-misadjustment groove (52) is formed on the connecting shaft (51); the mistake proofing bulge (9) is arranged on the pushing block (4); in a locking state, the mistake proofing bulge (9) is abutted against the inner wall of the mistake proofing groove (52) to prevent the bolt machine (5) from being overturned excessively.

8. The buckle assembly for the safety belt according to claim 6, wherein the housing (2) includes a mounting groove (10) for inserting the latch bolt (1); the mounting groove (10) is provided with a vibration-proof bulge (11) and a vibration-proof elastic sheet (12) which are tightly attached to the bolt (1); the anti-vibration bulge (11) and the anti-vibration elastic sheet (12) are respectively fixed on the opposite inner side walls of the mounting groove (10).

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