| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To miniaturize the whole device in the axial and the radial direction by abolishing an intermediate gear to be conventionally used. <P>SOLUTION: The webbing take-up device 10 is provided with a rack-and-pinion type pretensioner. A take-up shaft comprises a spool 12, a torsion shaft, and a sleeve integrally rotating with the spool 12. The drive mechanism of the pretensioner comprises a piston 116 which is disposed in a cylinder and moves in a sudden deceleration of a vehicle, and a pinion 102 which is directly connected with the sleeve through a clutch which is connected with the take-up shaft only in the sudden deceleration of the vehicle. The pinion is constituted as a component comprising a tooth part 104 where the pinion teeth 104A meshed with only the rack teeth, and a clutch part 106 which is coaxially and integrally formed with the tooth part, has a larger outside diameter than the tooth part, and is equipped with the clutch in an inner peripheral side. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
