Tactile feedback switch actuator

H - Electricity – 01 – H

Patent

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Details

H01H 3/02 (2006.01)

Patent

CA 2161152

A tactile feedback switch actuator (12) for an associated force-actuated switch (52) has a key cap (22) linked to a collapsible dome (34) by an optical fiber (36), all of which are light-transmittable. The actuator (12) is operated by manually applying an actuating force to the key cap (22) which exceeds the modulus of collapse of the dome (34). In response, the dome (34) reversibly collapses in a tactile snapping action against the underlying light-transmittable switch panel (54) having pressure-sensitive contacts (62a, 62b) embedded therein to change the operative state of the switch (52). When the actuating force is withdrawn, the collapsible dome (34) elastically returns to its uncollapsed condition, while the switch (52) remains in its newly-actuated operative state. The actuator (12) and associated switch (52) are structurally integrated and aligned so that light-emitting pixels (60) in an underlying electroluminescent panel provide visual feedback of the operative state of the switch (52).

Dispositif de commande de commutateur à rétroaction tactile (12) pour commutateur manuel (52). Comporte un dessus de touche (22) lié par une fibre optique (36) à un dôme enfonçable (34), tous ces éléments transmettant la lumière. Le dispositif de commande (12) s'actionne par l'application manuelle, sur le dessus de touche (22), d'une force qui dépasse le module d'enfoncement du dôme (34) : le dôme (34) s'enfonce alors élastiquement sous la pression tactile contre le panneau de commutation transmettant la lumière (54), lequel incorpore des contacts sensibles à la pression (62a, 62b) afin de varier l'état de fonctionnement du commutateur (52). Lorsque la pression est retirée, le dôme enfonçable (34) retrouve son état de départ (non enfoncé), tandis que le commutateur (52) demeure dans son nouvel état de fonctionnement. Le dispositif de commande (12) et le commutateur associé (52) sont structuralement intégrés et alignés de façon que les pixels luminescents (60) d'un panneau électroluminescent sous-jacent servent de témoins visuels de l'état de fonctionnement du commutateur (52).

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