Pulse-controlled camera, method for setting control reference po

Details Pulse-controlled camera, method for setting control reference po Pulse-controlled camera, method for setting control reference po

1993-02-05

1994-04-26

Perkey, W. B.

354439, G03B 908, G03B 1336

Patent

active

053071107

ABSTRACT:
A pulse-controlled camera has a single motor capable of conducting a drive of a photo-taking lens and a drive of opening and closing of shutter blades at a high speed with a high reliability and a high precision in a compact structure, in which mechanical errors in machining and assembling may be electrically adjusted and which can facilitate automatic assembling. The pulse-controlled camera comprises a basic reciprocating member which is rotated in a forward direction or in a backward direction with respect to a home position by a pulse motor. The forward rotation of the basic, reciprocating member from the home position also rotates a lens feeding member through a ratchet base plate in the forward direction, so that a cam action of the lens feeding member feeds a lens holding frame up o a position corresponding to a measured distance value. Then the basic reciprocating member rotates in the backward direction while leaving the ratchet plate at the position, passes the home position, and rotates a shutter blade opening and closing lever by an engaging pin thereof to open the shutter blades. The home position of the basic reciprocating member is set based on a timing when a home position signal generating portion interrupts a beam for detection of a photo interrupter.

REFERENCES:
patent: 4959675 (1990-09-01), Seki et al.

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