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    • 59. 发明公开
    • SEATBELT RETRACTOR
    • EP2716506A1
    • 2014-04-09
    • EP12792494.2
    • 2012-05-29
    • Ashimori Industry Co., Ltd.
    • MIYOSHI HiroyukiMATSUNAGA TomonariYAMANE EriNAKAYAMA TomoeYAMAKAWA Hiroki
    • B60R22/46
    • B60R22/46B60R22/4633
    • It is aimed to provide a seatbelt retractor whose manufacturing cost is reduced. A retractor includes a windup drum that winds webbing and a pretensioner unit that causes the windup drum to rotate in a windup direction of the webbing. The pretensioner unit includes a pinion gear configured to rotate in association with the windup drum, a piston that includes a rack for meshing with the pinion gear (165) and causes the windup drum to rotate in the windup direction through the pinion gear, a tubular cylinder that has a circular cross-section and movably holds the piston, and a drive mechanism that drives the piston. The piston further includes, on a rear surface side of the rack, a contact surface configured to come into contact with an inner wall of the cylinder, and the cylinder has such a tube length as not to expose the contact portion in a movable range of the piston.
    • 目的是提供一种制造成本降低的安全带卷收器。 卷收器包括卷绕卷带的卷取卷筒和使卷取卷筒沿带卷绕方向旋转的预张紧器单元。 预张紧器单元包括:小齿轮,该小齿轮构造成与卷绕滚筒相关联地旋转;活塞,其包括用于与小齿轮(165)啮合并且使卷绕滚筒通过小齿轮在卷起方向上旋转的齿条;管状 具有圆形横截面且可移动地保持活塞的气缸以及驱动活塞的驱动机构。 所述活塞在所述齿条的后表面侧还包括接触表面,所述接触表面被构造成与所述圆筒的内壁接触,并且所述圆筒具有这样的管长度以使得所述接触部分不暴露在 活塞。