| 摘要 |
A webbing take-up device reduced in cost by a reduction in size of a pre-tensioner and a lock device and a reduction in number of parts, wherein a plurality of projected parts (126) are formed on the inner peripheral part of a bearing main body (124) pivotally supporting a clutch part (106) and are in linear contact with the outer peripheral part of the clutch part (106) so that the bearing main body (124) pivotally supports the clutch part (106) indirectly through the projected parts (126), whereby, because the projected parts (126) are in linear contact with the clutch part (106), a contact area becomes extremely small and the projected parts (126) are easily deformed plastically by a frictional resistance between the projected parts (126) and the clutch part (106), and thus a resistance to prevent the clutch part (106) from rotating is reduced enough to supply a gas pressure efficiently for the rotation of a take-up shaft (20) and, as a result, those members which form the pre-tensioner (14) such as a gas generator (158) can be reduced in size and cost.
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