| 摘要 |
An inexpensive webbing retractor is obtained by making a pretensioner and a lock device small and reducing the number of parts. A plurality of protrusions 126 are formed on an inner peripheral portion of the bearing body 124, which pivotally supports a clutch portion 106. These protrusions 126 are brought into linear contact with an outer peripheral portion of the clutch portion 106, whereby the bearing body pivotally supports the clutch portion 106 indirectly via the protrusions 126. Since the protrusions 126 are brought into linear contact with the clutch portion, the contact area becomes quite small. Hence, the protrusions 126 are easily plastically deformed due to friction resistance with the clutch portion 106. Therefore, resistance that obstructs the rotation of the clutch portion 106 becomes small, and gas pressure can be efficiently supplied for the rotation of a take-up shaft 20. As a result, members such as a gas generator 158 and the like which structure the pretensioner 14 can be made small, enabling reduction of cost. <IMAGE> |
