Patent ID: 9688242
Date: 2017-06-27
CPC Classifications: B60R

Claim:
1. A seatbelt retractor comprising: a housing; a take-up drum rotatably housed in the housing and configured to take-up and store a webbing; and a pretensioner mechanism configured to rotate the take-up drum in a webbing-take-up direction for taking up the webbing when vehicle collision occurs, wherein the pretensioner mechanism includes: wherein the boss portion which faces an inner peripheral surface of the shaft receiving hole includes a pair of radially projecting portions provided on its both sides with reference to a rotation axis direction of the take-up drum and configured to project radially outward at full periphery of the boss portion, and wherein, position of the boss portion is restricted so as to be co-axial with the take-up drum by the restricting member, the pair of radially projecting portions of the boss portion project radially outward over the shaft receiving hole so that at least a peripheral edge portion of the shaft receiving hole is inserted in a clearance defined by the pair of radially projecting portions projecting radially outward over the shaft receiving hole to avoid movement of the driven body in the rotation axis direction.