摘要:
Provided are a seat belt retractor and a seat belt apparatus the number of components of which can be reduced and the size and weight of which can be reduced. A pretensioner 5 includes a rotor 51 that is connected coaxially with a spool 2 and that has a plurality of engaging teeth 51a formed on the outer periphery thereof, a power generating means 52 that engages with the engaging teeth 51a and rotates the rotor 51, and a cover member 53 that houses at least the rotor 51, and the cover member 53 is disposed inside the base frame 3, and can bear the spool 2.
摘要:
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 3 includes a power transmission member 31 that is engageable with external teeth 21 of the ring gear 2, a pipe 32 that contains the power transmission member 31, a gas generator 33 that is disposed at an end of the pipe 32, a piston 34 that receives gas generated from the gas generator 33 to press the power transmission member 31, a first stopper 35 that is disposed on an upstream side of the power transmission member 31, a second stopper 36 that is disposed between the power transmission member 31 and the piston 34, and a pretensioner cover 4 that defines a passage 41 for the power transmission member 31.
摘要:
Provided are a pretensioner, a retractor, and a seat belt device in which strength and slidability of a rod-shaped power transmission member may both be achieved. A pretensioner 3 includes a ring gear 31 on which the spool 2 is rotatably disposed, and power transmission units 32 for transmitting power to the ring gear 31 in an emergency. The power transmission units 32 includes a rod-shaped power transmission member 32a for transmitting power to the ring gear 31 while being plastically deformed, a tip reinforcing member 32b disposed on a tip side of the power transmission member 32a, a pipe 32c for containing the power transmission member 32a, and a gas generator 32d disposed at an end of the pipe 32c. The tip reinforcing member 32b has higher strength than the power transmission member 32a.