KR0163491B1 - Locking device of seat belt - Google Patents

Abstract

The present invention provides a webbing clamp device which allows the webbing lock to be almost simultaneously with the webbing clamping in an automobile seat belt, thereby achieving excellent clamping operation of the webbing clamp device while reducing costs and improving assembly performance due to a reduction in the number of parts. This invention is intended to be designed, when the locking ring 12 is rotated so that the catch 15 is caught by the latch wheel 11 by the operation of the sensing sensor 18 of the webbing locking device 10, the operation bar 24 Is rotated so that the clamper 22 clamps the web 3 between the receivers 21 and the lever 23 supporting the operation bar is rotated slightly to achieve secondary clamping. The operation is performed by the return screens 25 and 25 '.

Description

Webbing clamp device for car seat belts.

1 is an exploded perspective view of the apparatus of the present invention.

2 is a side configuration diagram of the device of the present invention.

Figure 3 is a longitudinal cross-sectional side view of the device of the present invention.

4 is a cross-sectional view along the line AA ′ of FIG. 3.

5 is an initial operation of the device according to the invention.

6 is a functional view showing the webbing locking and clamping according to the present invention.

7 (a) and 7 (b) are cross-sectional side views showing the operation of the apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1: frame 2: spool

3: web 10: webbing locking device

11: Ratchet wheel 12: Lock ring

14: fly wheel 14a: wheel mass

15: Pole 16: Tie Plate

17: return spring 18: detection sensor

20: webbing clamp device 21: receiver

22: clamper 23: lever

24: operation bar 24a: upper shaft portion

24b: Lower shaft 25,25 ': Return spring

26: screw 27: lever shaft

28: upper shaft hole 28 ': lower shaft hole

29: linkage arm

The present invention relates to a webbing clamp device having a webbing lock function by a clamper and a webbing lock function at the same time in a seat belt of an automobile. In particular, the present invention provides excellent clamping operability while reducing component parts and reducing assembly labor and cost. And it relates to a webbing clamp device of the vehicle seat belt invented to improve the assembly.

In general, car seat belts are designed to increase the safety by allowing webbing clamping prior to latch webbing locking in an emergency situation, and webbing clamping is generally performed on the upper part of the ratchet webbing locking device operated by vehicle detection. This is planned.

Known in this technique are Korean Patent Publication Nos. 88-12410 and 94-5456, and Japanese Patent Application Laid-open No. Hei 3-99960. However, in the webbing clamp structure of this device, the wedge clamp structure is connected to the triangular wedge to achieve clamping. Therefore, the agility of the operation is reduced and the operation must be performed using a relatively large number of parts. The number of assembling labors increases, resulting in a structure that involves a problem of lowering productivity.

Therefore, in carrying out the role of the seat belt to follow the agility of the safe operation, there is a problem that is not made of a suitable structure, but has a problem as a safety device that causes a decrease in safety.

SUMMARY OF THE INVENTION An object of the present invention is to provide a webbing clamping device in which webbing clamping is agile in being a bevel detection webbing lock, so that the webbing is no longer drawn out.

Another object of the present invention is to reduce the number of parts constituting the webbing clamp device to reduce the labor and cost, and to improve the productivity by improving the assembly.

In order to achieve the above object, the web is provided with a receiver and a clamper for clamping the web drawn out from the top of the spool when the webbing locks due to the rotation stop of the spool in which the web is wound, but the clamper is guided to the lever member It was designed to be fast, stable and agile.

In addition, the clamper rotates the rotational force of the lock ring according to the webbing locking operation by the c-shaped operation bar so that the clamper operation is performed, thereby ensuring reliable and agile operation.

Therefore, in the interlocking operation of the device according to the invention, the primary locking of the locking ring by the acceleration of the webbing sensor or the tilt sensor of the vehicle body, the secondary locking by the webbing clamping and the third locking of the ratchet. In other words, it has an auxiliary locking device, characterized in that the structure to facilitate the impact by lever lever is rotated minutely after the clamping in the secondary locking.

Referring to the present invention in more detail based on the preferred embodiment as follows.

FIG. 1 shows the separation state of the webbing locking device 10 and the webbing clamp device 20 of the vehicle sensing method.

The webbing locking device 10 is a well-known technique. The webbing locking device 10 is installed to rotate the ratchet wheel 11 on one side of the spool 2 that is rotatably installed inside the frame 1, and has a toothed portion in an outward direction. 12a) and a locking ring 12 having an interlocking groove 12b, a hook retainer 13 having a hook 13a, and a flywheel 14 having a wheel mass 14a are installed in a connected manner. It is coming true.

One side of the latch wheel 11 is provided with a pole 15 and a tie plate 16 having an interlocking pin 15a, and the lock ring 12 is rotated to return to its original position by the return spring 17. It becomes the structure that becomes.

In addition, the lower part of the flywheel 14 is provided with a detection sensor 18 consisting of a click 18a, a ball 18b, and a ball base 18c.

The web 3 wound on the spool 2 is guided by the web guide 4 to be pulled out, and the web guide 4 is configured to be assembled and separated from the frame 1. Reference numeral 19 is an assembly bolt.

Next, the webbing clamp device unit 20 according to the present invention will be described.

The webbing clamp device 20 includes a receiver 21, a clamper 22, and a lever 23 inside the frame 1 at the point where the web 3 is released from the spool 2, and a webbing sensing device. It is provided with an operation bar 24 assembled from the outside of the frame 1 with the part 10 and return springs 25 and 25 'returning it.

Accordingly, the receiver 21 is installed to be fixed inside the frame 1 by the screw 26 before the spool 2 is assembled. The clamper 22 and the lever 23 form a diagonal surface portion 22a, 23a which is in surface contact with each other, and has a rail portion 22b and a rail groove 23b formed therein to form an assembled structure.

The lever 23 is attached to the frame 1 by the lever shaft 27, so that minute rotation about the lever shaft 27 is possible.

The operation bar 24 for mounting the clamper 22 to the frame 1 has an upper shaft portion 24a and a lower shaft portion 24b while forming a c-shape.

The upper and lower shaft portions 24a and 24b of the operation bar 24 are inserted into the upper shaft hole 28 and the lower shaft hole 28 'formed at both sides of the frame 1, and at this time, the upper shaft portion 24a. ) Is assembled so as to fit into the cross hole 22c of the clamper 22 inside the frame 1.

In addition, the lower shaft portion 24b of the operation bar 24 and the lock ring 12 are connected to each other by the interlocking arm 29 to perform the interlocking operation. Reference numeral 29a denotes a hole into which the lower shaft portion 24b is fitted, and 29b denotes an arm boss inserted into the interlocking groove 12b.

In the return springs 25 and 25 ', the non-torture type return spring 25 is installed on the spring shaft 30 fixed to the frame 1, where one end 25a is fixed to the frame 1 and the other end ( 25b) is provided to engage the upper shaft portion 24a of the operation bar 24, so that the elastic action in the downward direction is applied to the operation bar 24.

In addition, the coil type return spring 25 'is provided such that one end thereof is caught by the upper shaft portion 24a of the operation bar 24, and the elasticity is pulled toward the arm boss 29b.

Reference numeral 31 in the drawing is a snap ring piece for preventing the departure of the operation bar (24).

The operation according to the present invention thus made will be described with reference to FIGS. 5 to 7.

5 is a view illustrating an operation state by the sensing sensor 18 of the webbing locking device 10. Since the operation according to the webbing locking device 10 is a known technology, only the operation related to the present invention will be described. .

That is, when an emergency situation or a collision accident occurs, as the ball 18b of the sensor 18 moves up in the lateral direction by inertial force, the click 18a causes the flywheel 14 to stop as shown in the dotted line. Meanwhile, only the wheel mass 14a installed to be rotated by the fly wheel 14 itself may be rotated.

Subsequently, the hook 13a of the hook retainer 13 is advanced by the rotation of the wheel mass 14a and the entire locking ring 12 is rotated as the hook 12a of the lock ring 12 is engaged.

Therefore, the lock ring 12 is rotated as shown in the phantom line in the solid line of FIG. 6, so that the interlocking grooves 12b are interlocked with the interlocking pins 15a. 11), the rotation of the spool 2 fixedly connected to the ratchet wheel 11 is stopped, which prevents the web 3 wound around the spool 2 from being released.

After the web 3 is locked, the web flim is returned to its original state by rotating the lock ring 10 by the return spring 17, so that all related parts are returned.

Next, the operation of the webbing clamp device unit 20 according to the present invention will be described with reference to FIG.

(A) of FIG. 7 shows a normal state, and (B) shows the web clamping state at the time of an emergency or a collision.

Therefore, when the lock ring 12 is rotated counterclockwise according to the operation of the detection sensor 18, the lower linkage part 24b of the operation bar 24 is pulled while the linking arm 29 is pulled.

When the lower shaft portion 24b of the operation bar 24 is pulled, the upper shaft portion guided to the lower shaft hole 28 'of the frame 1 is guided to the upper shaft hole 28 formed in the opposite direction while being pulled. 24a) is moved upward in the form of rotation in the direction of the receiver (21).

Therefore, the clamper 22 is in a state of being moved in the direction of the receiver 21 while being supported by the lever 23, and thus the clamping of the web 3 to be drawn out between the clamper 22 and the receiver 21 is made. .

At this time, since the lever 23 is a small rotation is rotated slightly in the direction of the web 3 around the lever shaft 27 by the operating force of the clamper 22, the web clamp device portion 20 immediately after the web clamping Secondary locking at is achieved.

The clamping release operation is performed when the locking ring 12 is rotated in the clockwise direction and the web locking release operation is performed. The pulling force acting on the lower shaft portion 24b of the linkage arm 29 and the operation bar 24 connected thereto disappears. As a result, you are free from restraint.

Accordingly, as the upper shaft portion 25a is pulled downward by the elasticity of the return springs 25 and 25 ', the operation bar 24, the clamper 22, and the receiver 21 are shown in FIG. It will be returned to the original web flim state as shown.

Furthermore, the device of the present invention has a primary web locking and secondary web clamping action, and a third web clamping according to the micro-rotation of the lever 23, thereby improving safety even more than before.

In addition, since the number of parts for the configuration of the webbing clamp device 20 is reduced while the structure of the web bar clamping operation by the operation bar 24 is reduced, the assembly labor is also reduced in assembling. In addition to improvement, productivity is also improved.

Therefore, the device of the present invention can provide a more reliable web clamping, which enables the third web clamping, and thus can supply a product having a greatly improved function and product reliability.

In addition, it improves labor and parts, and improves assembly, thereby improving productivity and reducing costs, thereby providing a high-safety product at a lower cost.

Claims (10)

The frame has a spool in which webbing is wound, and on one side, a webbing locking device including a ratchet wheel, a lock ring, a hook retainer, a pole, and a sensor is provided. The clamper is moved by the rotation of the lock ring. In configuring the web clamping device portion to clamp the web passed between the clamper receiver, the lower shaft portion of the operation bar connected to the linking arm is pulled by the pulling force by the rotation of the lock ring, and the lower shaft portion and the horizontal The clamper is connected to the upper shaft portion of the freely rotating operation bar, which is not fixed, and is configured to clamp the web by a clamper that is moved in a direction opposite to the pulling direction of the lower shaft portion, and the clamper is installed on the frame by a lever shaft. Guided by a lever that is made to be clamped automatic Webbing clamp device for car seat belts. The webbing clamp device of claim 1, wherein the upper and lower shaft portions of the operation bar are inserted into upper and lower shaft holes formed at both sides of the frame to be operated. The webbing clamp device of claim 1 or 2, wherein the operation bar is mounted and operated so as not to be perpendicular to the upper shaft hole and the lower shaft hole of the frame. The webbing clamp device of claim 1, wherein one axis of the operation bar is configured to freely rotate and move the clamp without being fixed to the frame. The webbing clamp device of claim 2, wherein the upper shaft hole of the frame has an inclination angle in an upper direction and the lower shaft hole has an inclination angle in a lower direction. The webbing clamp device of claim 1, wherein the clamper and the lever form a diagonal portion and are configured to slip. The webbing clamp device of claim 1, wherein the webbing clamp device of the vehicle seat belt is configured to slip by having a rail portion and a rail groove on a diagonal surface of the clamper and the lever. The webbing clamp device of claim 1, wherein the upper shaft portion of the operation bar is pulled by a return spring to release the clamp. The webbing clamp device of claim 8, wherein the return spring is configured to be a torsion coil type return spring. The webbing clamp device of claim 1, wherein the linking arm includes an arm boss configured to be connected to a hole through which the lower shaft of the operation bar passes and an linking groove of the lock ring.