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US 6,723,935 B1Granted
Keyswitch device and keyboard device
AssigneeAlps Electric Co., Ltd.
InventorMakoto Watanabe
Life of this patent
Estimating the term…
Abstract
A keyswitch device includes first to third levers, a holder, and a switch. One side of each lever rotatably engages a base plate. The holder is supported so as to be movable vertically with respect to the base plate by being engaged with the other side of each lever. The switch is disposed between the base plate and the holder, and is used to perform a switching operation when the holder is moved vertically. A rotary shaft of the third lever is disposed so as to cross rotary shafts at engaging sections of the respective first and second levers.
Claims12
A keyswitch device comprising:
- a base;
- a plurality of levers, one side of each of the levers movably engaging the base;
- a keytop supported so as to be movable vertically with respect to the base by being engaged with another side of each levers;
- and
- a switch that performs a switching operation when the keytop is moved vertically,
- wherein rotary shafts which allow rotation of the levers within respective rotational planes are disposed at respective engagers at both sides of the levers;
- wherein one of the engagers at each of the levers is a first engager that movably supports one of the rotary shafts at one of the base and the keytop;
- wherein another of the engagers at each of the levers is a second engager that rotatably supports another of the rotary shafts;
- and
- wherein the rotary shafts disposed at the engagers of at least one of the plurality of levers are oriented so as to cross one of the rotary shafts and rotary shaft lines disposed at the engagers of another of the levers.
7 more elements
Dependencies are inferred from the claim text.