Title:
FILM REWINDING DEVICE FOR CAMERA
Document Type and Number:
Japanese Patent JP3153304
Kind Code:
B2
Abstract:
PURPOSE: To provide a rewinding device where a taken photograph is not influenced even when a back cover is opened before and after display for film number shows '0' by starting the subtraction of the film after executing rewinding corresponding to winding at the initial stage of rewinding.
CONSTITUTION: This device is provided with a detecting means for detecting the change of the back cover; a feeding means for winding and rewinding the film; a pulse generation means which generates a pulse by interlocking with the feeding of the film; a film number counter which is cleared when the back cover is opened, where '1' is set after executing rewinding by the 1st specified pulse when the back cover is closed and which counts up every time winding by the 2nd specified pulse is completed thereafter; and a display unit 23 for displaying the value of the film number counter, and further provided with a control means which counts the number of pulses nearly equal to the 1st specified pulse at the time of starting rewinding, starts the subtraction of the film number counter after counting and performs the subtraction of the film number counter every time the 2nd specified pulse is counted at the time of and after starting the subtraction.
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Inventors:
Hashimoto, Isamu
Sato, Koji
Sato, Koji
Application Number:
JP33574491A
Publication Date:
April 09, 2001
Filing Date:
November 25, 1991
Export Citation:
Assignee:
ASAHI OPTICAL CO LTD
International Classes:
G03B17/00; G03B1/60; (IPC1-7): G03B17/00; G03B1/60
Attorney, Agent or Firm:
三浦 邦夫
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