Pretensioner, retractor, and seat belt device
AssigneeTakata Corporation
InventorTadayuki ASAKO
Life of this patent
Estimating the term…
Abstract
Provided are a pretensioner, a retractor, and a seat belt device that can effectively reduce kinetic energy of an injected power transmission member. A power transmission unit includes a power transmission member that is engageable with external teeth of the ring gear, a pipe that contains the power transmission member, a gas generator that is disposed at an end of the pipe, a piston that receives gas generated from the gas generator to press the power transmission member, a first stopper that is disposed on an upstream side of the power transmission member, a second stopper that is disposed between the power transmission member and the piston, and a pretensioner cover that defines a passage for the power transmission member.
Claims7
A pretensioner comprising:
- a ring gear to which a spool is rotatably disposed, the spool winding a webbing for restraining an occupant;
- and
- a power transmission unit for transmitting power to the ring gear in an emergency, wherein
- the power transmission unit includes a power transmission member that is engageable with external teeth of the ring gear, a pipe that contains the power transmission member, a gas generator that is disposed at an end of the pipe, a piston that receives gas generated from the gas generator to press the power transmission member, a first stopper that is disposed on an upstream side of the power transmission member, a second stopper that is disposed between the power transmission member and the piston, and a pretensioner cover that defines a passage for the power transmission member.
Dependencies are inferred from the claim text.