Seat belt retractor
AssigneeAshimori Industry Co., Ltd.
InventorTakao Katayama
Life of this patent
Estimating the term…
Abstract
In a seatbelt retractor of this invention is provided with an energy-absorbing means which performs an energy absorption by twisting a rotational shaft of a spool (first energy-absorbing means) and an energy-absorbing means which performs an energy absorption by twisting a wire 2b (second energy-absorbing means), a containing side (upper side of the disk member 2c) which contains the wire 2b and a take-up side (side between the disk member 2c and a plate body 2a) which takes up the wire after being pulled out from the containing side and being twisted are made on different planes, so that the length of the wire which constitutes the second energy-absorbing means can be made longer, and the energy-absorbing time by both the torsion bar and the wire can be extended.
Claims6
A seatbelt retractor comprises:
- a take-up drum on which a webbing is wound;
- a torsion bar inserted through the take-up drum, one end of which is coupled with one end of the take-up drum in a manner that a relative rotation with the take-up drum is impossible, which is biased in the direction of the webbing taken up;
- an emergency lock mechanism located on the other end of the torsion bar, which restrains a rotation in the direction of the webbing pulled out;
- a lock actuating device which actuates the emergency lock mechanism in case of a vehicle emergency;
- a plate body having a take-up part on a side thereof being adjacent to a side on the other end of the take-up drum, which is coupled with the other end of the torsion bar in a manner that a relative rotation with the torsion bar is impossible;
- a deformable member, one end of which is coupled with the take-up part of the plate body, a part continued to the one end of which is located in a deformable member guide part formed on a periphery on the other end of the take-up drum, a part continued to the deformable member guide part which is wound up on and contained in a side different from a take-up side of the take-up part, which is wound up on the take-up part of the plate body by the take-up drum in case of a vehicle emergency;
- and
- a curved path on which a substantially medium part of the deformable member is located, which is formed on the periphery on the other end of the take-up drum.
Dependencies are inferred from the claim text.