Input devices and key structures thereof having resilient...

Details Input devices and key structures thereof having resilient... Input devices and key structures thereof having resilient...

2006-01-20

2008-08-26

Donovan, Lincoln (Department: 2832)

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

C200S344000

Reexamination Certificate

active

07417200

ABSTRACT:
Key structures are provided. A key structure comprises a key cap, a substrate, a resilient unit, a first rod and a second rod. The first and second rods connect the substrate and the key cap. When the resilient unit is in a first position, the resilient unit abuts the first rod and exerts a lateral pre-tension force on the first rod, to hold the key cap at a first height with respect to the substrate, such that the key structure is in a normal state. When the resilient unit moves to a second position, the first rod is released from the resilient unit, and the key cap descends to a second height by gravity or an external force, such that the key structure is in a depressed state.

REFERENCES:
patent: 5466901 (1995-11-01), Mochizuki
patent: 5735390 (1998-04-01), Takagi et al.
patent: 6570113 (2003-05-01), Yu et al.
patent: 7022927 (2006-04-01), Hsu
patent: 7345253 (2008-03-01), Hsu

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