LENS-BARREL,申请号JP19910295760-传众专利搜索

LENS-BARREL

申请公布号：JPH05134164(A)

申请号：JP19910295760

申请日期：1991.11.12

申请公布日期：1993.05.28

申请人：

CANON INC

发明人：SUZUKI TAKASHI

分类号：G02B7/09;G02B7/08

主分类号：G02B7/09

摘要：PURPOSE:To always operate a belt connecting mechanism also in the case of manual operation by providing an automatic-manual operation switching means in a mechanical sequence of the belt connecting mechanism and a motor. CONSTITUTION:When a manual operating member is rotated, an output gear 19 meshed with the manual operating member is rotated to rotate a pulley output gear 18 to which the output gear 19 is fixed. On the other hand, the pulley output gear 18 is connected to a pulley gear 16 by a belt 17 as an elastic member. By the tension of the belt 17, the pulley gear 16 and the pulley output gear 18 are forced to rotate while the side pressure is applied to a shaft 12a and a bearing 12b, respectively, that is, they are subjected to frictional force, Accordingly, as the moderate friction is applied to the rotation of the manual operation member, the manual operation feeling, that is, the operation having good manual feeling can be obtained. Since the pulley gear 16 is disconnected from a switching gear 15, the rotation of the manual operation member has no effect on an oscillatory wave motor A.