Title:
PISTON, SAFETY BELT RETRACTOR AND PRETENSION SAFETY BELT
Document Type and Number:
WIPO Patent Application WO/2020/098469
Kind Code:
A1
Abstract:
Disclosed is a piston (9) used for a pretension function of a safety belt. The piston is provided with a front side, a circumferential side and a back side as well as a gas flowing channel, the gas flowing channel being formed in the piston (9) and being used for fluidly connecting the back side with the front side or the circumferential side, wherein the gas flowing channel is sealed by a sealing element (12) and can be released when a preset pressure is achieved or exceeded; and the gas flowing channel is provided with a dissipation structure used for dissipating the energy of a gas flow passing through the gas flowing channel. In a collision accident, when the pressure of the gas generated through a gas generator (8) is too large, smooth and steady pressure relief can be achieved through the gas flowing channel, the pressure drop of the pressure release is slowed while the pressure release is controlled, and meanwhile, a flame possibly carried by the gas flow can be inhibited during the pressure release. Further provided are a safety belt retractor and a pretension safety belt.
More Like This:
Inventors:
GUO XIN (CN)
XU JUN (CN)
XU JUN (CN)
Application Number:
PCT/CN2019/113174
Publication Date:
May 22, 2020
Filing Date:
October 25, 2019
Export Citation:
Assignee:
YANFENG AUTOMOTIVE SAFETY SYSTEMS CO LTD (CN)
International Classes:
B60R22/46
Foreign References:
| CN209305530U | 2019-08-27 | |||
| CN102092359A | 2011-06-15 | |||
| CN104853964A | 2015-08-19 | |||
| CN101875339A | 2010-11-03 | |||
| JP2001063520A | 2001-03-13 | |||
| US20140077018A1 | 2014-03-20 |
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
Download PDF: