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Multi-stage safety belt pre-tightening device

A technology of safety belt and limit device, which is applied in the direction of belt tightener, etc.

Active Publication Date: 2012-10-03
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the seat belt pre-tensioning device is a single-stage pre-tensioning device, and the length of the seat belt pre-tensioning is fixed. During the collision, the vehicle cannot adopt the corresponding seat belt pre-tensioning action and length according to different occupant protection needs.

Method used

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  • Multi-stage safety belt pre-tightening device

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Embodiment Construction

[0021] The present invention will be described in detail below according to the accompanying drawings, which is a preferred embodiment among various implementations of the present invention.

[0022] As shown in the accompanying drawings, the seat belt multi-stage pretensioning device is composed of a seat belt tail end fixing device, a plurality of fixed pulleys, a piston, a high-pressure gas generating device, and installation components. The seat belt pretensioning device can be integrated with the retractor inside one device, or can be separated from the retractor and used in series between the two devices.

[0023] During the collision, the vehicle can adopt corresponding seat belt pre-tightening actions and lengths according to different occupant protection needs. The seat belt pretensioner is ignited separately in multiple stages to obtain different pretension lengths.

[0024] Pushed by the high-pressure gas, during the ejection process of the piston rod, the pressure...

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PUM

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Abstract

The invention relates to a multi-stage safety belt pre-tightening device which comprises a safety belt towing strap, a fixed pulley and a piston; the fixed pulley is arranged on one side of the safety belt towing strap, and the piston is arranged on the other side of the safety belt ribbon; and the safety belt ribbon slides between the fixed pulley and the end of the piston.

Description

technical field [0001] The invention belongs to the field of general automobiles, and in particular relates to a safety belt multi-stage pretensioning device. Background technique [0002] The seat belt pre-tensioning technology can be used to tighten the seat belt immediately after the collision and before the occupant starts to move, so that the occupant is closer to the seat, and there is a larger buffer distance between the occupant and the front interior parts of the occupant cabin, reaching The effect of protecting the occupants. [0003] However, in the prior art, the seat belt pre-tensioning device is a single-stage pre-tensioning device, and the pre-tensioning length of the seat belt is fixed. During a collision, the vehicle cannot adopt a corresponding pre-tensioning action and length of the seat belt according to different occupant protection needs. Contents of the invention [0004] The purpose of the present invention is to provide a multi-stage pre-tensionin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R22/46
Inventor 王鹏翔张亮高勇丽张秀琴卫董程
Owner CHERY AUTOMOBILE CO LTD