Patent ID: 11964626
Assignee: JOYSON SAFETY SYSTEMS JAPAN G.K.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A seat belt retractor comprising:
a spool configured to wind up a webbing that restrains an occupant;
a base frame configured to rotatably enclose the spool;
a pretensioner capable of winding up the webbing in an emergency;
a lock mechanism capable of stopping the pull-out of the webbing; and
a locking base configured to connect the spool and the lock mechanism, wherein the base frame includes:
an opening portion through which the locking base is inserted,
lock teeth formed on an inner circumference of the opening portion and capable of engaging with a part of the lock mechanism, and
a guide member facing at least a part of an outer circumferential surface of the locking base and disposed along the opening portion, and

the guide member is configured not to come into contact with the locking base until the pretensioner is shifted to a steady driving state, is configured to come into contact with the locking base when the pretensioner is steadily driven, and is configured to allow contact between the lock teeth and the locking base when subjected to a predetermined load after the pretensioner is shifted to the steady driving state.