Miniature flash circuit switch with high current capability

Details Miniature flash circuit switch with high current capability Miniature flash circuit switch with high current capability

1997-09-30

1999-04-20

Blankenship, Howard B.

Photography

Camera detail

Lens cover

396542, 396543, G03B 1700

Patent

active

058951369

ABSTRACT:
A switch of simple and compact design has a current capability sufficient to enable use in a flash control circuit of a camera. In a preferred embodiment, a camera is provided that includes a camera body, a circuit board attached to the camera body, and a switch attached to the circuit board. The switch includes a leaf spring switch element having a first end coupled to the circuit board and a second end shaped to form a first electrical contact point and a second electrical contact point. A bridge contact is also provided that includes first and second ends attached to the circuit board, wherein the bridge contact extends over the second end of the switch such that the second end is located between the bridge contact and an electrical contact pad located on a surface of the main circuit board. The leaf spring switch element is biased so that the first electrical contact point comes into contact with the bridge contact. A movable lens cover assembly contacts a mechanical contact point of the leaf spring switch when moved from a closed position to an open position, such that the leaf spring switch is forced downward and the second electrical contact comes into contact with the electrical contact pad. The switch has a current capability of six amps, and forms an open circuit in a flash control circuit of the camera when the first electrical contact is in contact with the bridge contact. The open circuit is closed when the second electrical contact is in contact with the electrical contact pad.

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