Lens barrier mechanism

Details Lens barrier mechanism Lens barrier mechanism

1994-11-28

1997-03-25

Gray, David M.

Photography

Camera detail

Lens cover

G03B 1700

Patent

active

056149735

ABSTRACT:
A lens barrier mechanism of a photographing lens which opens and closes a lens opening of a lens unit, includes a plurality of blades at least partially superimposed upon one another in an optical axis direction of the lens unit. At least one of the plurality of blades is a leading blade to which a driving force is applied, and the other is a trailing blade or trailing blades driven by the leading blade. Each of the plurality of blades has an open and closed position with respect to the lens opening. Also included is a mechanism for driving the leading blade to move the same between open and closed positions, a first member formed on each of the leading blade and the trailing blades for moving the trailing blades from a closed position to an open position by a movement of the leading blade when the leading blade moves in the same direction, a second member formed on each of the leading blade and trailing blades for moving the trailing blades from open to closed positions by a movement of the leading blade when the leading blade moves in the same direction, and a closed position defining member for stopping the trailing blades at the closed position when the leading blade is moved from open to closed.

REFERENCES:
patent: 3580156 (1971-05-01), Loseries
patent: 3633485 (1972-01-01), Hiruma
patent: 3683778 (1972-08-01), Weiss
patent: 3918076 (1975-11-01), Shono
patent: 3978503 (1976-08-01), Shono
patent: 4752796 (1988-06-01), Tsukahara et al.
patent: 4876563 (1989-10-01), Ishida et al.
patent: 4944030 (1990-07-01), Haraguchi et al.
patent: 4989027 (1991-01-01), Ishii et al.
patent: 5033819 (1991-07-01), Tanaka
patent: 5040017 (1991-08-01), Arai
patent: 5130730 (1992-07-01), Ishii et al.
patent: 5136315 (1992-08-01), Nomura
patent: 5144493 (1992-09-01), Nomura
patent: 5159372 (1992-10-01), Nomura et al.
patent: 5214462 (1993-05-01), Haraguchi et al.
patent: 5262898 (1993-11-01), Nomura
patent: 5264885 (1993-11-01), Haraguchi et al.
patent: 5276475 (1994-01-01), Haraguchi et al.
patent: 5313329 (1994-05-01), Ueda
French Search Report.
Patent Abstract of Japan vol. 7, No. 10 (P-168)(1155) dated Jan. 14, 1983.

Affiliated with

Also associated with

Rating

Lens barrier mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lens barrier mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lens barrier mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2207817