WEBBING ADJUSTING BUCKLE

Abstract

The present invention discloses a webbing adjusting buckle. The technical solution of the present invention can achieve a self-locking function to avoid the situation that the webbing is drawn back and even deviates from the roller, and effectively improve the safety and reliability of the webbing adjusting buckle.

Description

TECHNICAL FIELD

The present invention relates to the technical field of buckles, and in particular to a webbing adjusting buckle.

BACKGROUND

Buckles are widely used in daily life, especially in products such as safety harness. Buckles play a role in length adjustment, locking and clamping of webbing. Usually, a buckle comprises a rectangular buckle frame and at least one cross bar located in the middle of the buckle frame, and a free end of the webbing is locked in various ways after bypassing the cross bar. For a structure with multiple cross bars or a single cross bar plus an external lock catch, the operation of adjusting the length of the webbing is relatively complex; and for a structure with a single cross bar, the safety risk of webbing slack exists. Therefore, structures with rotatable cross bars and able to tightly press the webbing have gradually appeared in the market, and the function of adjusting the length of the bypassing webbing is achieved by the rotation of the cross bars. However, this scheme will still impose safety risks, especially the possibility that the cross bars may rotate reversely and make the webbing slack, or even the risk that the webbing is drawn back and deviates from the cross bars.

SUMMARY

In view of the above problems in the prior art, the present invention provides a webbing adjusting buckle in order to overcome at least one of the above defects.

The present invention has the following specific technical solution:

A webbing adjusting buckle, comprising a shell and a roller, wherein a webbing connecting space is formed on the shell, the roller can be moved back and forth and arranged in the shell rotationally around its own axis, the middle part of the roller is located in the webbing connecting space, and both ends thereof are extended into the shell, so that the webbing of a seat belt can be mounted after bypassing the roller, and the length of the webbing of the seat belt can be adjusted by rotating the roller;

• • the webbing adjusting buckle also comprises at least one limit locking member which is movably assembled in the shell, and the limit locking member comprises a limit column and an elastic member which rest against each other in the front and back;
  • at least a part of one end of the limit column away from the elastic member rests against the periphery of the roller, and a rotation limit structure is formed between the periphery wall of the roller and the limit column to allow the roller to rotate in one direction and prevent the roller from rotating reversely; and the elastic member is used to provide the limit column with an elastic force towards the roller.

Preferably, both ends of the roller are respectively and circumferentially provided with a plurality of notches in the periphery, at least a part of one end of the limit column away from the elastic member rests in the notches, and the length direction of the limit column is perpendicular to the axis direction of the roller to allow the roller to rotate in one direction and prevent the roller from rotating reversely.

Preferably, the cross section of the notches is V-shaped, each notch comprises a limit surface and a guide surface adjacent to each other, and the guide surface has an arc transition;

• • in a limited and clamped state, the upper end face of the limit column rests against the limit surface to clamp and prevent the roller from rotating reversely, the guide surface rests against the front end face of the limit column, and the limit column is pushed backward by the guide surface when the roller rotates; and the rotation limit structure is jointly formed by the notches and the front end of the limit column.

Preferably, one end of the limit column facing to the roller is a square column structure.

Preferably, the elastic member is a spring.

Preferably, two limit locking members are symmetrically arranged, the shell is spliced by an upper shell and a lower shell, and the webbing connecting space which runs up and down, two mounting grooves used for accommodating the limit locking members, and two waist type through grooves adjacent to the mounting grooves and used for accommodating both ends of the roller are jointly formed.

Preferably, the periphery surface of the middle part of the roller is provided with a helically arranged anti-slip tooth structure.

The above technical solution has the following beneficial effects:

The webbing adjusting buckle comprises a shell, a roller and a limit locking member, the limit locking member comprises a limit column and an elastic member, and a rotation limit structure is formed between the periphery wall of the roller and the limit column, so that the roller is allowed to rotate in one direction and prevented from rotating reversely, and the length of the webbing of a seat belt can be adjusted with the one-way rotation of the roller when the webbing is mounted after bypassing the roller; and due to the rotation limit structure, the webbing is prevented from being drawn back reversely, so that a self-locking function can be achieved to avoid the situation that the webbing is drawn back and even deviates from the roller, and the safety and reliability of the webbing adjusting buckle is effectively improved.

DESCRIPTION OF DRAWINGS

FIG. 1 is a three-dimensional diagram of a webbing adjusting buckle of the present invention;

FIG. 2 is a three-dimensional diagram from another view of a webbing adjusting buckle of the present invention;

FIG. 3 is an exploded diagram of a webbing adjusting buckle of the present invention;

FIG. 4 is a top view of a webbing adjusting buckle of the present invention;

FIG. 5 is an A-A sectional view in FIG. 4;

FIG. 6 is a three-dimensional diagram of a roller in a webbing adjusting buckle of the present invention.

DETAILED DESCRIPTION

To easily understand the technical means, the creative feature, the object and the effect realized by the present invention, the present invention is further elaborated in the following embodiments in combination with drawings. The top-down direction shown on paper in FIG. 5 is defined as the top-down direction in the embodiments, and the left-to-right direction shown on paper in FIG. 4 is defined as the forward-to-backward direction in the embodiments.

As shown in FIG. 1 to FIG. 6, a webbing adjusting buckle provided by the present invention comprises a shell 1 and a roller 3, wherein a webbing connecting space 2 is formed on the shell 1, the roller 3 can be moved back and forth and arranged in the shell 1 rotationally around its own axis, the middle part of the roller 3 is located in the webbing connecting space 2, and both ends thereof are extended into the shell 1, so that the webbing of a seat belt can be mounted after bypassing the roller 3, and the length of the webbing of the seat belt can be adjusted by rotating the roller 3;

The webbing adjusting buckle also comprises at least one limit locking member 4 which is movably assembled in the shell 1, and the limit locking member 4 comprises a limit column 5 and an elastic member 6 which rest against each other in the front and back; at least a part of one end of the limit column 5 away from the elastic member 6 rests against the periphery of the roller 3, and a rotation limit structure is formed between the periphery wall of the roller 3 and the limit column 5 to allow the roller 3 to rotate in one direction and prevent the roller 3 from rotating reversely; and the elastic member 6 is used to provide the limit column 5 with an elastic force towards the roller 3.

In a specific application, as shown in FIG. 5, the length of the webbing of a seat belt can be adjusted with the one-way rotation of the roller 3 when the webbing is mounted after bypassing the roller 3, and the roller 3 is prevented from rotating reversely by the rotation limit structure, so that in a normal operation state, the roller 3 can be driven to rotate in one direction by pulling a free end B of the webbing, so as to drawn out the free end and reflect the action of tightening the seat belt; at the same time, as the roller 3 is prevented from rotating reversely, a self-locking function can be achieved to avoid the situation that the free end is drawn back and even deviates from the roller 3, and the safety and reliability of the webbing adjusting buckle is effectively improved; in addition, under the action that the outer wall of the roller 3 is always pressed by the limit locking member 4, a connecting end C of the webbing is always tightly pressed between the roller 3 and the side wall of the webbing connecting space 2; when the seat belt need to be loosened, the roller 3 can be manually pulled backwards by a user to make the connecting end of the webbing no longer in a tightly pressed state, and then the length of the webbing can be adjusted.

Based on the above technical solution, the webbing adjusting buckle comprises a shell 1, a roller 3 and a limit locking member 4, the limit locking member 4 comprises a limit column 5 and an elastic member 6, and a rotation limit structure is formed between the periphery wall of the roller 3 and the limit column 5, so that the roller 3 is allowed to rotate in one direction and prevented from rotating reversely, and the length of the webbing of a seat belt can be adjusted with the one-way rotation of the roller 3 when the webbing is mounted after bypassing the roller 3; and due to the rotation limit structure, the webbing is prevented from being drawn back reversely, so that a self-locking function can be achieved to avoid the situation that the webbing is drawn back and even deviates from the roller 3, and the safety and reliability of the webbing adjusting buckle is effectively improved.

In a preferred embodiment, as shown in FIG. 3, FIG. 5 and FIG. 6, both ends of the roller 3 are respectively and circumferentially provided with a plurality of notches 10 in the periphery, at least a part of one end of the limit column 5 away from the elastic member 6 rests in the notches 10, and the length direction of the limit column 5 is perpendicular to the axis direction of the roller 3 to allow the roller 3 to rotate in one direction and prevent the roller 3 from rotating reversely. Further, the cross section of the notches 10 is V-shaped, each notch 10 comprises a limit surface 11 and a guide surface 12 adjacent to each other, and the guide surface 12 has an arc transition; in a limited and clamped state, the upper end face of the limit column 5 rests against the limit surface 11 to clamp and prevent the roller 3 from rotating reversely, the guide surface 12 rests against the front end face of the limit column 5, and the limit column 5 is pushed backward by the guide surface 12 when the roller 3 rotates; and the rotation limit structure is jointly formed by the notches 10 and the front end of the limit column 5. When the roller 3 is in a stationary state, i.e., the limit surface 11 is clamped by the upper end face of the limit column 5, the front end of the limit column 5 is driven by the elastic member 6 to push the guide surface 12; as the roller 3 cannot be pushed to rotate reversely, the roller 3 is further pushed forward by the limit column 5, so that the roller 3 is forced close to the front side wall of the webbing connecting space 2 to tightly press the webbing. Preferably, one end of the limit column 5 facing to the roller 3 is a square column structure. Further, the elastic member 6 is a spring; but obviously, a conventional member with elasticity, including but not limited to an elastic rubber column, can also be used.

As a further preferred embodiment, specifically as shown in FIG. 1 to FIG. 3, two limit locking members 4 are symmetrically arranged, the shell 1 is spliced by an upper shell 7 and a lower shell 8, and the webbing connecting space 2 which runs up and down, two mounting grooves 9 used for accommodating the limit locking members 4, and two waist type through grooves 13 adjacent to the mounting grooves 9 and used for accommodating both ends of the roller 3 are jointly formed and used as assembly spaces. Among which, the mounting grooves 9 allow the limit column 5 and the elastic member 6 to move back and forth, and the waist type through grooves 13 allow the roller 3 to move back and forth. Further, the periphery surface of the middle part of the roller 3 is provided with a helically arranged anti-slip tooth structure.

The above is just preferred embodiments of the present invention, and is only intended to illustrate rather than limiting the present invention. Those skilled in the art shall understand that many changes, modifications or even equivalents can be made within the spirit and scope defined by the claims of the present invention, and all of which will fall into the protection scope of the present invention.

Claims

1. A webbing adjusting buckle, comprising a shell (1) and a roller (3), wherein a webbing connecting space (2) is formed on the shell (1), the roller (3) can be moved back and forth and arranged in the shell (1) rotationally around its own axis, the middle part of the roller (3) is located in the webbing connecting space (2), and both ends thereof are extended into the shell (1), so that the webbing of a seat belt can be mounted after bypassing the roller (3), and the length of the webbing of the seat belt can be adjusted by rotating the roller (3); the webbing adjusting buckle also comprises at least one limit locking member (4) which is movably assembled in the shell (1), and the limit locking member (4) comprises a limit column (5) and an elastic member (6) which rest against each other in the front and back;at least a part of one end of the limit column (5) away from the elastic member (6) rests against the periphery of the roller (3), and a rotation limit structure is formed between the periphery wall of the roller (3) and the limit column (5) to allow the roller (3) to rotate in one direction and prevent the roller (3) from rotating reversely; and the elastic member (6) is used to provide the limit column (5) with an elastic force towards the roller (3).

2. The webbing adjusting buckle according to claim 1, wherein both ends of the roller (3) are respectively and circumferentially provided with a plurality of notches (10) in the periphery, at least a part of one end of the limit column (5) away from the elastic member (6) rests in the notches (10), and the length direction of the limit column (5) is perpendicular to the axis direction of the roller (3) to allow the roller (3) to rotate in one direction and prevent the roller (3) from rotating reversely.

3. The webbing adjusting buckle according to claim 2, wherein the cross section of the notches (10) is V-shaped, each notch (10) comprises a limit surface (11) and a guide surface (12) adjacent to each other, and the guide surface (12) has an arc transition; in a limited and clamped state, the upper end face of the limit column (5) rests against the limit surface (11) to clamp and prevent the roller (3) from rotating reversely, the guide surface (12) rests against the front end face of the limit column (5), and the limit column (5) is pushed backward by the guide surface (12) when the roller (3) rotates; and the rotation limit structure is jointly formed by the notches (10) and the front end of the limit column (5).

4. The webbing adjusting buckle according to claim 3, wherein one end of the limit column (5) facing to the roller (3) is a square column structure.

5. The webbing adjusting buckle according to claim 1, wherein the elastic member (6) is a spring.

6. The webbing adjusting buckle according to claim 1, wherein two limit locking members (4) are symmetrically arranged, the shell (1) is spliced by an upper shell (7) and a lower shell (8), and the webbing connecting space (2) which runs up and down, two mounting grooves (9) used for accommodating the limit locking members (4) and two waist type through grooves (13) adjacent to the mounting grooves (9) and used for accommodating both ends of the roller (3) are jointly formed.

7. The webbing adjusting buckle according to claim 1, wherein the periphery surface of the middle part of the roller (3) is provided with a helically arranged anti-slip tooth structure.