Patent ID: 9637084
Date: 2017-05-02
CPC Classifications: B60R

Claim:
1. A webbing take-up device comprising: a spool on which webbing is taken up; a motor that rotates the spool; a first gear that is provided on a rotation transmission route from the motor to the spool; a second gear that is provided on the rotation transmission route and that is capable of relative rotation with respect to the first gear; a clutch member that is provided at the first gear and transmits rotation between the second gear and the first gear, and that cuts off the rotation transmission by the clutch member rotating relative to the second gear; a restriction section that is provided between the first gear and the clutch member in an axial direction of the second gear, and that restricts movement of the clutch member toward the first gear side, and a rotor including: a circular cylinder portion that is formed in a circular cylinder shape; and a corner portion that is formed at an end portion of the circular cylinder portion at a side of the first gear, the corner portion having a tapered shape such that, as seen along the axial direction of the second gear, a diameter of the corner portion is reduced compared to a diameter of the circular cylinder portion, wherein, due to the restriction section, the clutch member is wound onto the rotor at a position further toward a side of the circular cylinder portion in the axial direction than a position of the corner portion, which position is an outer most position in a radial direction of the circular portion, and the rotor is fixed to the second gear, and wherein the restriction section is integrally formed at the first gear.