Pulse-controlled camera, method for setting control reference position thereof, and method for adjusting mechanical errors in production thereof
US5307110A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1993 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Feb 5, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/08
- WIPO fieldOptics
- WIPO sectorInstruments
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 po…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.