JPS6033081Y2 - Automobile seat belt retractor - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a winding device for an automobile seat belt.

In particular, the present invention relates to a seat belt retractor that absorbs an axial gap in an automobile seat belt retractor to prevent noise from being emitted from the retractor.

Recently, as living standards have improved, there has been a desire to improve the comfort of automobiles, and as part of this, quietness in the interior of the vehicle has also become an important position, but seatbelt retractors are also one of the sources of abnormal noise. It is listed in

Automobile seat belt retractors include non-locking retractors and emergency locking retractors.
There are devices such as , automatic locking retractor, etc., but all of them have a gap in the axial direction of the winding shaft.

As a result, the axle moves due to the gap in the axial direction, producing impact noise.However, since the car bodies of today's automobiles have a monocoque structure in which the entire body is made by press molding, the generated sound is transmitted through the car body, and it seems that the sound is far away from the source. There may be strange noises coming out in the wrong place.

Therefore, in this invention, a bushing is attached to the base of the winding device, thereby suppressing the movement of the winding shaft in the axial direction, thereby preventing the winding device from generating abnormal noise.

To explain the drawings, FIG. 1 shows a conventional example, in which a winding shaft 4 is attached to a support portion 13, 14 formed on a base 3 of a winding device via synthetic resin bushings 1, 2. A latch assembly 5 is attached to the shaft 4, and a belt 6 is wound around a reel winder 8 of the latch assembly 5.

A shaft tip 4' of one end of the shaft 4 is supported by a bush 1, and a spring device 7 for biasing the belt 6 in the winding direction is attached to the other end.

A cover 10 is attached to the spring device 7 by screws or the like.

Reference numeral 9 denotes latch saw teeth provided on the outer periphery of the reel winder.

In such a device, a gap t exists between the shaft 4 and the bushing 1, and for this reason, the shaft 4 moves in the axial direction when the belt is wound up or pulled out, and in combination with the vibration of the vehicle body, abnormal noise is generated.

FIG. 2 shows a first embodiment of this invention, and the same parts as in FIG. 1 are given the same reference numerals.

A latch assembly 5 and a reel winder 8 are attached to a shaft 4 supported by support parts 13 and 14 formed on the base 3, and when the belt 6 is wound around it,
The spring device 7 is provided at one end of the shaft, and among the bushes supporting the shaft 4, the bush 2 on the spring device 7 side is the same as the conventional one, but the supporting means on the tip 4' side of the shaft 4 is The bush 11 as shown in the figure is closed at the tip,
It has an inwardly concave shape, and the formed concave portion 12 holds down the tip 4' of the shaft.

Furthermore, this bushing 11 is formed with a flange 15 that abuts against the inner wall 3' of the base 3.

Since the bushing 11 is made of synthetic resin and has elasticity as described above, it can elastically press the tip end 4' of the shaft 4, thereby preventing the occurrence of abnormal noise due to the movement of the shaft in the axial direction.

Also, the bushing 11 is the support part of the base 7.3, 13 and the shaft 4.
Since it is provided between the shaft 4 and the shaft 4, smooth rotation of the shaft 4 is ensured.

FIGS. 3 and 4 show an example of the shape of the bushing of the embodiment, where a is a plan view and b is a cross-sectional view of the bushing.

In the example shown in FIG. 4, the bushing has a shape in which one portion adjacent to the recessed portion (in the figure, on both sides of the recessed portion) is cut out.

Therefore, the recess has greater elasticity than the example shown in FIG.

To assemble this device, first push the bushings 11 and 2 into the base 3, assemble the latch assembly 5 and belt 6 into the base, then press fit the shaft 4 from the bushing 2 side, assemble the spring 7, and remove the cover. 10.

This invention has the above-mentioned configuration, and has a simple and compact structure that ensures smooth rotation of the retracting shaft, and elastically suppresses the axial movement of the retracting shaft of the seat belt retractor. This prevents abnormal noise from occurring.

[Brief explanation of the drawing]

FIG. 1 shows a conventional device, FIG. 2 shows an embodiment of this invention, and FIGS. 3 and 4 show a bush-shaped one of the embodiment.
In the example, a shows a plan view of the bushing, and b shows a cross-sectional view thereof. Explanation of symbols, 1, 2, 11...butsu, 3.
...Base, 4...Axis, 1'...
・Tip, 5...Latch assembly, 6゛...
...Belt, 7...Spring device, 8...
...Reel winder, 9...Sawtooth, 10...
・・Cover, 12・・・・Concave part, 13.14・Song・
Support part.

Claims (1)

[Scope of utility model registration request] (1) A base, a take-up shaft rotatably supported by the base support and to which one end of the belt is attached, a spring device for biasing the take-up shaft in the belt winding direction, and a take-up shaft. and a support portion of the base, the support means is formed with an inwardly elastic recess and a flange that abuts the inner wall of the base, the recess and the end of the winding shaft coming into contact with each other. 1. A seat belt retractor for an automobile, comprising: a support means for elastically suppressing movement of a retractor shaft in the axial direction. . (2) The automobile seat belt retractor according to claim 1, wherein the support means is partially cut off adjacent to the recessed portion.