Patent ID: 8070086

Claim:
A webbing winding device comprising: a spool to which a longitudinal direction base end side of a webbing belt is fixed and which rotates in a winding direction so that the webbing belt is wound from the longitudinal direction base end side; a frame which directly or indirectly supports the spool; a motor which is operated to rotate an output shaft; a rotating body which rotates when rotation of the output shaft is transferred thereto; a rotation transmission member which is provided at the rotating body so as to be displaceable relative to the rotating body, to thereby displace so as to be directly or indirectly connected to the spool, and transmit rotation of the rotating body to the spool; a retaining member which includes a pair of retaining portions facing each other in a rotary radial direction of the rotating body and is mounted to the frame; and an interference member which is provided between the pair of retaining portions so as to be elastically retained by the retaining portions in a press contact state and to be moved in a rotary circumferential direction of the rotating body by being guided by the pair of retaining portions when receiving a predetermined magnitude or more of a pressing force in the rotary circumferential direction, and which is disposed on the side of the rotation transmission member in a rotary direction of the rotating body so as to interfere with the rotation transmission member or to release interference with respect to the rotation transmission member to thereby permit displacement of the rotation transmission member in a direction in which the rotation transmission member is connected to the spool when the rotating body rotates in the winding direction.