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Piston, safety belt retractor and pre-tightening type safety belt

A technology for seat belt retractors and seat belts, which is applied in the direction of seat belts, belt retractors, transportation and packaging in vehicles, and can solve problems such as excessive preload, occupant injury, and damage to seat belt retractors , to achieve the effect of slowing down the pressure drop, avoiding injury, and stably releasing the pressure

Pending Publication Date: 2020-05-26
YANFENG AUTOMOTIVE SAFETY SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive gas pressure can on the one hand cause damage to the components of the seat belt retractor, and on the other hand can create excessive pretension and thus cause injury to the occupants

Method used

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  • Piston, safety belt retractor and pre-tightening type safety belt
  • Piston, safety belt retractor and pre-tightening type safety belt
  • Piston, safety belt retractor and pre-tightening type safety belt

Examples

Experimental program
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Effect test

Embodiment Construction

[0067] figure 1 shows an exploded view of a seat belt retractor according to an embodiment of the invention, and figure 2 display press figure 1 The assembly diagram of the seat belt retractor of , in which the side cover 5 is omitted, in order to better describe the interaction between the tubular element 6 and the transmission gear 4 .

[0068] The belt retractor comprises a bracket 1 , which is designed in particular as a U-shaped bracket, which can be fastened in a motor vehicle, for example in a seat. The reel assembly 2 is rotatably supported in the bracket 1 , and a webbing not shown can be wound on the reel assembly 2 and pulled out from the reel assembly 2 . A spline shaft 3 can be formed on one axial end of the reel assembly 2 , and a transmission gear 4 is fitted on the spline shaft 3 without relative rotation so as to be able to rotate together with the reel assembly 2 . The side cover 5 can be fixed on the bracket 1 for covering the axial end of the reel assem...

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PUM

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Abstract

The invention relates to a piston for a safety belt pre-tightening function. The piston is provided with a front side, a circumferential side, a rear side, and a gas flowing channel which is formed inthe piston and connects the rear side to the front side or the circumferential side in a flow manner; the gas flowing channel is closed by a closing element and can be released when current pressurereaches or exceeds predetermined pressure; and the gas flowing channel is provided with a dissipation structure for dissipating energy of gas flow flowing through the gas flowing channel. The invention also relates to a safety belt retractor comprising such a piston and to a pre-tightening safety belt comprising such a safety belt retractor. In a collision accident, when the pressure of gas generated by a gas generator is too large, stable pressure relief can be achieved through the gas flowing channel, pressure drop during pressure relief is relieved while pressure relief is controlled, and meanwhile, flames possibly carried by the gas flow during pressure relief are restrained.

Description

technical field [0001] The invention relates to a piston for a seat belt pretensioning function, a seat belt retractor comprising such a piston and a pretensioning seat belt comprising such a seat belt retractor. The device according to the invention is used in particular in motor vehicles, but it can also be used in aircraft, water vehicles, amusement parks or other installations. Background technique [0002] Seat belts are standard safety protection devices in motor vehicles, which provide protection to occupants during emergency situations in motor vehicles, especially when collisions occur. In conventional seat belts, when the occupant wears the seat belt, there is a certain gap between the webbing and the occupant's body, and this gap has an adverse effect on the occupant's safety protection function in the event of a motor vehicle emergency. For this reason, on the basis of conventional seat belts, a pre-tensioned seat belt has been developed, which pre-tightens the ...

Claims

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Application Information

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IPC IPC(8): B60R22/46
CPCB60R22/4628B60R2022/4638B60R22/46
Inventor 郭鑫徐俊
Owner YANFENG AUTOMOTIVE SAFETY SYST CO LTD
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