Title:
SEATBELT RETRACTOR
Document Type and Number:
WIPO Patent Application WO/2012/172962
Kind Code:
A1
Abstract:
A pre-tensioner unit provided to a retractor comprises: a pinion gear capable of rotating in association with the operation of a winding drum; a piston having a rack meshing with the pinion gear and rotating the winding drum through the pinion gear in the direction in which webbing is wound up; a tube-shaped cylinder for housing the piston and having a circular cross-section; a gas generation member for filling gas into an inner space formed by the piston and the inner wall of a pipe cylinder and driving the piston by the pressure of the gas; and a plate-shaped seal member (163) attached to the piston and sealing between the piston and the inner wall of the cylinder. The seal member (163) has a protrusion (631) engaged in an engagement groove formed in the piston. The cross-sectional shape of both the engagement groove and the protrusion (631), taken in the direction perpendicular to the direction of the engagement, is a polygon.
Inventors:
NAKAYAMA TOMOE (JP)
YAMANE ERI (JP)
YAMANE ERI (JP)
Application Number:
PCT/JP2012/063711
Publication Date:
December 20, 2012
Filing Date:
May 29, 2012
Export Citation:
Assignee:
ASHIMORI IND CO LTD (JP)
NAKAYAMA TOMOE (JP)
YAMANE ERI (JP)
NAKAYAMA TOMOE (JP)
YAMANE ERI (JP)
International Classes:
B60R22/46
Foreign References:
| JP2010202082A | 2010-09-16 | |||
| JP2010202080A | 2010-09-16 |
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
Hidetoshi Yoshitake (JP)
Hidetoshi Yoshitake (JP)
Download PDF:
Claims: