Patent ID: 6857594

Claim:
A webbing winding device comprising: a winding shaft, at which a base end of a long belt-form webbing belt for restraining a body of a vehicle occupant is anchored, and which rotates in a winding direction around a shaft center thereof for winding the webbing belt at an outer peripheral portion thereof, and rotates in a drawing out direction, which is opposite to the winding direction, when the webbing belt is drawn out; an input gear which is mechanically coupled to the winding shaft, the input gear rotating for rotating the winding shaft, and a plurality of teeth being formed at an outer peripheral portion of the input gear; a motor side rotating body directly or indirectly coupled to a driving section, the motor side rotating body rotating by receiving driving force of the driving section; at least one first coupling member which rotates about an axis of the input gear in conjunction with rotation of the motor side rotating body, and is moveable toward and away from the teeth of the input gear in conjunction with rotation of the motor side rotating body one way about an axis thereof, the first coupling member meshing with the input gear by moving toward the teeth, transmitting the rotation the one way about the axis of the motor side rotating body to the input gear, and rotating the input gear in the winding direction; and at least one second coupling member which rotates about the axis of the input gear in conjunction with the rotation of the motor side rotating body, and is moveable toward and away from the teeth of the input gear in conjunction with rotation of the motor side rotating body the other way about the axis thereof, the second coupling member meshing with the input gear by moving toward the teeth, transmitting the rotation the other way about the axis of the motor side rotating body to the input gear, and rotating the input gear in the drawing out direction.