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Film winding system of camera

  • US 5,003,331 A
  • Filed: 05/14/1990
  • Issued: 03/26/1991
  • Est. Priority Date: 04/06/1988
  • Status: Expired due to Term
First Claim
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1. In a film winding system of a camera, capable of automatically winding a film roll, comprising an electric motor, cocking means driven by said motor, for cocking a predetermined mechanism, and film winding means driven by said motor, for winding the film roll, said system further comprising:

  • a differential gearing for driving said cocking means and said film winding means, individually, said differential gearing;

    first lock means driven by said motor, for locking said film winding means so that said film winding means does not operate;

    second lock means provided in said cocking means, for locking said cocking means so that said cocking means does not operate;

    first detection means for detecting whether or not said first lock means locks said film winding means;

    second detection means for detecting whether or not said second lock means locks said cocking means;

    interlock control means for controlling said first lock means so that said first lock means operates when said cocking means is in operation; and

    control means for controlling execution to initiate a first operation, a second operation, and a third operation, sequentially, the first operation representing initiating drive of said motor and actuating of said cocking means through the drive of said motor, the second operation representing that actuating of said interlock control means is caused to stop and locking of said first lock means is cancelled when said second detection means detects that said second lock means locks said cocking mean, the third operation representing that said motor is turned off when said first detection means detects that said first lock means locks said film winding means.

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