SEAT BELT RETRACTOR AND SEAT BELT APPARATUS PROVIDED WITH SAME

摘要

[Object] To provide a seat belt retractor that is capable of generating a more stable load when restricting a load acting on the seat belt and when absorbing energy, and a seat belt apparatus including the same.;[Solution] A seat belt retractor 3 includes a frame 11, a seat belt 4, a spool 12 that is rotatably supported by the frame 11 and that retracts the seat belt 4, a lock mechanism 60 that allows rotation of the spool 12 while not in operation and that prevents rotation of the spool 12 in a seat belt withdrawing direction while in operation, and an energy absorption mechanism 20 that restricts a load acting on the seat belt 4 and that absorbs energy of an occupant. In the seat belt retractor 3, the energy absorption mechanism 20 includes a first energy absorption member 21 that absorbs energy through a rotational difference between the spool 12 and the lock mechanism 60, a first energy transmission member 22 that is attached on one end side of the first energy absorption member 21, a second energy transmission member 23 that meshes with the first energy transmission member 22, and a second energy absorption member 24 that absorbs energy through a rotational difference between the second energy transmission member 23 and the spool 12.

主权项

1. A seat belt retractor comprising:
a frame; a seat belt; a spool that is rotatably supported by the frame and that retracts the seat belt; a lock mechanism that allows rotation of the spool while not in operation and that prevents rotation of the spool in a seat belt withdrawing direction while in operation; and an energy absorption mechanism that restricts a load acting on the seat belt and that absorbs energy of an occupant, wherein the energy absorption mechanism includes
a first energy absorption member that absorbs energy through a rotational difference between the spool and the lock mechanism,a first energy transmission member that is attached on one end side of the first energy absorption member,a second energy transmission member that meshes with the first energy transmission member, anda second energy absorption member that absorbs energy through a rotational difference between the second energy transmission member and the spool.