Opto-electrical joystick switch having a resilient, rigidly mounted central shaft
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United States of America Patent
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-
Feb 19, 1991
Grant Date -
N/A
app pub date -
Jul 29, 1990
filing date -
Jul 29, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An opto-electrical joystick switch having a hollow cylindrical (20) housing with a collared top (26) and a separated bottom (28). A resilient joystick shaft (36) is rigidly mounted onto the housing bottom and penetrates through an opening at the top of the collar. A pair of printed circuit boards (46) and (50) are juxtapositioned within the housing, each having at least four light emitting diodes (48) and opposed light sensing photodiodes (52) in communication with each other through a light beam. A light blocking commutator disc (54) is disposed upon the shaft between the boards such that when the shaft is manually forced in a given direction, the light is interrupted from the diodes. An external or optional internal power source energizes the diodes and provides a basis for an electronic circuit that processes a signal created by the blocked diodes when the 8-position switch is displaced from its neutral position.
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Cited Art Landscape
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