Patent ID: 9132804
Filing Date: 2015-09-15
Classification: B60R

Abstract:
1. A seatbelt device, comprising: a spindle upon which a seatbelt is wound up; an electrical actuator configured to generate motive power for rotating the spindle; and a power transmission mechanism configured to transmit motive power from the electrical actuator to the spindle, wherein the power transmission mechanism includes: an actuator side gear to which motive power from the electrical actuator is transmitted; a spindle side gear provided on the spindle side; and elastic pieces installed on one of the actuator side gear and the spindle side gear, a wall surface having a plurality of engaging surfaces capable of engaging the elastic pieces and formed on the other of the actuator side gear and the spindle side gear, a torque limiter mechanism is provided wherein, when a torque differential greater than a prescribed operational torque has occurred between the actuator side gear and the spindle side gear, each of the elastic pieces disengages from a first engaging surface of the plurality of engaging surfaces and moves relatively with respect to the other of the actuator side and spindle side gear such that the torque differential becomes equal to or lower than the prescribed operational torque, and wherein the prescribed operational torque is set as a torque at which each of the elastic pieces moves from the first engaging surface, where the elastic piece is positioned when the actuator side gear and the spindle side gear are in an assembled state, to an adjacent second engaging surface when the electrical actuator is driven to perform a wind-up operation, wherein the prescribed operational torque is greater than an operational torque at which the elastic piece moves from the adjacent second engaging surface to a next adjacent third engaging surface.