Lens shutter using an electrostrictive strain element as driving

Details Lens shutter using an electrostrictive strain element as driving Lens shutter using an electrostrictive strain element as driving

1987-12-22

1988-11-22

Gellner, Michael L.

354265, G03B 700, G03B 914

Patent

active

047869305

ABSTRACT:
A lens shutter using an electrostrictive strain element as a driving source, arranging a shutter blades opening and closing lever and the electrostrictive strain element driving the opening and closing lever so that inertia forces acting on the opening and closing lever through engagement with the electrostrictive strain element and acting on the electrostrictive strain element through engagement with the opening and closing lever are counterbalanced by each other, in order to eliminate variations of exposure caused by various positions of a camera. The basic portion of the electrostrictive strain element is secured to a retaining member supported rotatably on a shutter base plate and the retaining member may well be biased by a spring to increase the inertia force of the electrostrictive strain element. Thereby, even if a shock is applied to the shutter from the outside, it does not occur that the shutter blades are inadvertently opened and closed. The rotation of the retaining member to rotate the opening and closing lever in a direction to open the shutter blades through the electrostrictive strain element is prevented by an eccentric pin.

REFERENCES:
patent: 3110824 (1963-11-01), Flanagan

Affiliated with

Also associated with

Rating

Lens shutter using an electrostrictive strain element as driving 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 shutter using an electrostrictive strain element as driving, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lens shutter using an electrostrictive strain element as driving will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-437927