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1. 发明授权

US4935764A Stepping drive unit for camera 失效
标题翻译：相机驱动单元步进
公开(公告)号：US4935764A
公开(公告)日：1990-06-19
申请号：US219854
申请日：1988-07-13
申请人： Isao Nakazawa , Takayuki Tsuboi , Yasuhik Shiomi
发明人： Isao Nakazawa , Takayuki Tsuboi , Yasuhik Shiomi
IPC分类号： G02B7/08 , G03B3/10
CPC分类号： G03B3/10 , G02B7/08
摘要： A stepping drive unit for cameras which is capable of stepwise driving a photographic optical system by operating a member which is placed into a reciprocating motion by means of an electromagnetic force on a plane substantially parallel with the photographic optical axis and not through a cam, whereby the transmission efficiency of a drive cam is increased. The drive is also capable of eliminating the need to employ a stepping drive in returning the photographic optical system to an initial position whereby the number of steps taken by the stepping drive is reduced, and of conducting its functions without applying any excessive impulsive force by stepwise increasing the amount of electricity charged to the electromagnetic drive member as the number of steps taken by the stepping drive increases, whereby the level of mechanical driving sounds is greatly reduced.
摘要翻译：一种用于照相机的步进驱动单元，其能够通过在基本上平行于摄影光轴并且不通过凸轮的平面上通过电磁力操作放置在往复运动中的构件来逐步驱动照相光学系统，由此驱动凸轮的传动效率提高。该驱动器还能够消除在将照相光学系统恢复到初始位置时采用步进驱动的需要，由此步进驱动器采取的步骤数量减少，并且在不施加任何过度冲击力的情况下进行其功能随着步进驱动步骤的数量增加而增加向电磁驱动部件充电的电量，从而大大降低了机械驱动声音的程度。

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