Shutter having overcharge release buffer

Details Shutter having overcharge release buffer Shutter having overcharge release buffer

1991-02-05

1993-08-24

Gellner, Michael L.

G03B 908

Patent

active

052393259

ABSTRACT:
A shutter comprises a shutter driving member arranged to be movably supported, an electromagnet which can be switched to an attracting state and an unattracting state, the electromagnet including a yoke and a coil, an armature arranged to move in a direction of going away from the yoke after being attracted by the yoke, so as to move the shutter driving member in the direction of shutter-running from a shutter-running preparatory position, a moving member for moving the shutter driving member toward the shutter-running preparatory position and holding the shutter moving member after further moving the shutter driving member from a position where the armature is brought into contact with the yoke by the movement of the shutter driving member, and a buffer member arranged to collide with a portion moving in a state where the armature is in contact with the yoke, when the holding of the shutter driving member by the moving member is released. The shutter is thus lightweight and small and has resistance to an impact.

REFERENCES:
patent: 4129877 (1978-12-01), Yamamichi et al.
patent: 4355878 (1982-10-01), Ohniwa et al.

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