POSITION CONTROLLING AND ADJUSTING DEVICE

PURPOSE:To improve the reliability of operation and positioning accuracy by eliminate a mechanism which sets a body to be controlled previously and locking the body to be controlled at a specific position by a pawl which is driven by a bistable combination solenoid. CONSTITUTION:A combination soleno...

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Bibliographic Details
Main Authors KOBAYASHI MIKIO, NISHIDA TORU, TERUI HIROSHI, ARAKI KUNIHIKO
Format Patent
LanguageEnglish
Published 18.07.1988
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
ELECTROGRAPHY
HOLOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:PURPOSE:To improve the reliability of operation and positioning accuracy by eliminate a mechanism which sets a body to be controlled previously and locking the body to be controlled at a specific position by a pawl which is driven by a bistable combination solenoid. CONSTITUTION:A combination solenoid control circuit 20 powers on the bistable combination solenoid 90 in response to the start of operation to separate the pawl 91 from a ratchet wheel 85. When shutter releasing operation is performed in this state, a motor begins to rotate and the stop lever of a camera rotates. A rotational quantity detector 19 starts counts the quantity of rotation of the ratchet wheel 85 at the point of time and powers on the solenoid 90 reversely a specific time later through an interpolating means 4 which interpolates output pulses of the detector 19 after reaching a specific aperture counted value. Consequently, the pawl 91 is engaged with the ratchet wheel 85 to stop the rotation. The mechanism is therefore relatively simple and the reliability and accuracy are improved.
Bibliography:Application Number: JP19870006957