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US 7,427,725 B2Granted
Keyboards
AssigneeDarfon Electronics Corp.
InventorsWen-Kuang Hou, Chih-Chieh Cheng
Life of this patent
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Abstract
A keyboard. A membrane circuit board includes a plurality of switches. At least one keycap is disposed on the membrane circuit board and includes a plurality of activating pillars respectively corresponding to and separated from the switches. When the keycap is moved toward the membrane circuit board, one of the activating pillars compresses one of the switches, outputting a signal corresponding to the keycap.
Claims18
A keyboard, comprising:
- a membrane circuit board comprising a switch;
- a keycap disposed on the membrane circuit board and comprising elastic material, wherein the keycap comprises an activating pillar corresponding to the switch;
- and
- a reinforcement sheet disposed between the keycap and the membrane circuit board, wherein the hardness of the reinforcement sheet exceeds that of the keycap, when the keycap is pressed, the keycap and reinforcement sheet move toward the membrane circuit board and the activating pillar of the keycap compresses the switch of the membrane circuit board, outputting a signal corresponding to the keycap.
1 more element
A keyboard, comprising:
- a membrane circuit board comprising a plurality of switches;
- a plurality of keycaps disposed on the membrane circuit board and comprising elastic material, wherein each keycap comprises an activating pillar corresponding to each switch, and one of the keycaps is provided with a multiple keycap;
- and
- a reinforcement sheet disposed between the multiple keycap and the membrane circuit board, wherein the hardness of the reinforcement sheet exceeds that of the multiple keycap, when the multiple keycap is pressed, the multiple keycap and reinforcement sheet move toward the membrane circuit board and the activating pillar of the multiple keycap compresses the corresponding switch of the membrane circuit board, outputting a signal corresponding to the multiple keycap.
1 more element
Dependencies are inferred from the claim text.