1989-12-20
1991-09-24
Gellner, Michael L.
3541951, 354288, G03B 1704
Patent
active
050517651
ABSTRACT:
A camera having a photographic optical system, a lens barrel disposed to be movable relative to a camera body in a direction of an optical axis and holding the photographic optical system, a focal length switchover mechanism for moving the photographic optical system such that the photographic optical system has a longer focal length as the same is moved forwardly in the direction of the optical axis, and a lens barrier displaceable between a closed position and an opened position for covering and uncovering a front face of the lens barrel. This lens barrier is disposed independently of the lens barrel adjacent a front end of the lens barrel having returned to a home position thereof at the side of the camera body such that the lens barrier is not movable in unison with the lens barrel. The lens barrel is moved to a projected position at which a front portion of the same is projected forwardly of the lens barrier when the focal length of the photographic optical system is set to be long by the focal length switchover mechanism. When the lens barrel is placed at the projected position and if the lens barrier is operated to its closed position, the lens barrel first returns to its home position before the lens barrier will close.
REFERENCES:
patent: 4597657 (1986-07-01), Wakabayashi
patent: 4771303 (1988-09-01), Matsumoto et al.
patent: 4864338 (1989-09-01), Wakabayashi
"Modern Photography", Apr. 1988.
Appendix A "Photographic Industries", vol. 46, No. 4, Apr. 1, 1988.
Appendix B "Kamera Tuusin", Camera Communication, vol. 43, No. 3, published Mar. 20, 1988.
Kashima Masataka
Kobayashi Haruo
Yamanaka Akira
Yoshizaki Akira
Gellner Michael L.
Minolta Camera Kabushiki Kaisha
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