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Webbing retractor

A technology for winding devices and seat belts, which is applied in car seat belts, belt tighteners, transportation and packaging, etc., and can solve problems such as cost and weight increase

Active Publication Date: 2015-06-10
KK TOKAI RIKA DENKI SEISAKUSHO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to prevent or suppress buckling of the portion near the inner end of such a compression balance spring, cost and weight increase

Method used

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  • Webbing retractor
  • Webbing retractor
  • Webbing retractor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0037]

[0038] figure 1 In FIG. 1 , the main part configuration of the seat belt retractor 10 according to the first embodiment of the present invention is shown in an exploded perspective view.

[0039] Such as figure 1 As shown, the belt retractor 10 has a belt spool 18 . The belt shaft 18 is provided between a pair of leg plates constituting a not-shown frame. The base end side of the long-side direction of the seat belt 20 formed in the shape of a long belt is locked to the belt shaft 18. It is wound around the outer peripheral portion of the seat belt 20 starting from the base end side in the lateral direction. On the other hand, when the seat belt 20 is pulled toward the front end side of the seat belt 20, the seat belt 20 wound on the spool 18 is pulled out from the spool 18, and the seat belt take-up device 10 rotates in the direction opposite to the winding direction. Rotate in the pulling direction.

[0040] On the other hand, a case 24 constituting a tension...

no. 2 approach

[0100] Figure 12 In order to explain the above-mentioned first embodiment figure 2 The structure of the clutch 202 of the seat belt take-up device 200 of the second embodiment is shown in the corresponding exploded perspective view.

[0101] As shown in the figure, the clutch 202 of the seat belt winding device 200 has a ring 204 as a second rotating body. The ring 204 has a bottom wall 206 which acts as a clutch stop. The bottom wall 206 is formed in a substantially disc shape, and a circular through-hole 208 through which the shaft portion 104 passes is formed substantially in the center.

[0102] A cylindrical outer peripheral wall 210 is formed from the outer peripheral portion of the bottom wall 206 toward the spring cover 42 side. In addition, an inner peripheral wall 212 is formed on the inner side of the outer peripheral wall 210 from the bottom wall 206 toward the spring cover 42 side. The inner peripheral wall 212 is parallel to the outer peripheral wall 210 , ...

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PUM

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Abstract

A webbing retractor that can alleviate the load on a reducing balance spring without increasing cost and weight is obtained. When a ring inertially rotates in a retraction direction together with a ratchet gear, a ring-side pressing portion of a load receiving portion accommodating portion formed in the ring presses a spring-side load receiving portion of a clutch spring in the retraction direction. Due to this, the clutch spring is loosened, whereby the ring can easily inertially rotate in the retraction direction together with the ratchet gear, and the load acting on a reducing balance spring can be alleviated.

Description

technical field [0001] The present invention relates to a seat belt take-up device having a tension reducer capable of reducing the force applied to the seat belt in the winding direction when the occupant wears the body-constraining seat belt. Background technique [0002] In the seat belt winding device disclosed in the following Patent Document 1 (referred to as "seat belt winding device for automobiles" in Patent Document 1), the belt shaft (in Patent Document 1) is aligned with the belt shaft in the winding direction. A coil spring (referred to as a "main coil spring" in Patent Document 1) biased by a "seat belt winding shaft" is separately provided with a reduce balance spring (reduce balance spring in Patent Document 1 called "secondary coil spring"). [0003] Patent Document 1: Publication of Japanese Patent Laid-Open No. 2003-19946 [0004] However, in the seat belt winding device disclosed in Patent Document 1, when the compression balance spring changes from the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R22/44
CPCB60R22/44B60R2022/4453B60R22/34
Inventor 斋藤拓宏森信二尾崎隆宏马越智也仓田谕
Owner KK TOKAI RIKA DENKI SEISAKUSHO