Patent ID: 8695911
Filing Date: 2014-04-15
Classification: B60R

Abstract:
1. A webbing take-up device comprising: a spool formed in a cylinder shape on which a webbing belt is wound in layered manner; a torsion shaft housed in an axial center portion of the spool and disposed along an axial direction of the spool, an end portion in the axial direction of the torsion shaft being retained by the spool; a shaft lock section provided at a side of another end portion in the axial direction of the torsion shaft and being capable of locking the other end portion in the axial direction of the torsion shaft, the shaft lock section including a clutch member; a drive section that outputs drive force when locking of the other end portion in the axial direction of the torsion shaft is switched by the shaft lock section from a lockable state to a non-lockable state; a pawl that includes a flat plane shaped load receiving face, the pawl being retained in a load receiving position in a normal state and the pawl rotationally moving on being imparted with the drive force from the drive section; and a lock ring formed in a ring shape, at which an engaging portion capable of engaging with the clutch member of the shaft lock section is formed on an inner peripheral face side, and at which a protrusion portion is formed on an outer peripheral face side, the protrusion portion being set with a lower rigidity than a rigidity of the pawl, and making contact with and being supported by the load receiving face in a state where the pawl is retained in the load receiving position, and the lock ring being unable to rotate due to the protrusion portion being supported by the load receiving face, and rotation of the lock ring being permitted by the load receiving face departing from the protrusion portion due to rotational movement of the pawl.