Key switch and electronic device
AssigneePolymatech Co., Ltd.
InventorMasashi Saitoh
Life of this patent
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Abstract
A jog dial switch, which functions as a key switch, includes a key sheet, a rotatable key top arranged on the key sheet, and a movement amount detector for detecting movement amount of the key top. The movement amount detector includes four permanent magnets arranged on the key top, three Hall elements, and an electric circuit for processing signals output from the Hall elements. The Hall elements and the electric circuit are arranged below the key sheet. The key sheet is formed by a water resistant material and covers the electric circuit.
Claims18
A key switch comprising:
- a key sheet arranged in a frame;
- a key top movably arranged on the key sheet;
- and
- a movement amount detector for detecting movement amount of the key top, the movement amount detector including:
- a magnet arranged on the key top;
- a magnetic detection sensor arranged in or below the key sheet;
- and
- an electric circuit, arranged below the key sheet, for processing a signal output from the magnetic detection sensor, the electric circuit being covered by the key sheet, and the key sheet being formed from a material that is water resistant and transmits magnetism.
A key switch comprising:
- a key sheet arranged in a frame;
- a key top movably arranged on the key sheet;
- and
- a movement amount detector for detecting movement amount of the key top, the movement amount detector including:
- a reflective member arranged on the key top;
- a light source;
- a light detection sensor arranged in or below the key sheet;
- and
- an electric circuit, arranged below the key sheet, for processing a signal output from the light detection sensor, the electric circuit being covered by the key sheet, and the key sheet being formed from a material that is water resistant and translucent.
An electronic device comprising:
- a frame;
- and
- a key switch, the key switch including:
- a key sheet arranged in the frame;
- a key top movably arranged on the key sheet;
- and
- a movement amount detector for detecting movement amount of the key top, the movement amount detector including:
- a magnet arranged on the key top;
- a magnetic detection sensor arranged in or below the key sheet;
- and
- an electric circuit, arranged below the key sheet, for processing a signal output from the magnetic detection sensor, the electric circuit being covered by the key sheet, and the key sheet being formed from a material that is water resistant and transmits magnetism.
An electronic device comprising:
- a frame;
- and
- a key switch, the key switch including:
- a key sheet arranged in the frame;
- a key top movably arranged on the key sheet;
- and
- a movement amount detector for detecting movement amount of the key top, the movement amount detector including:
- a reflective member arranged on the key top;
- a light source;
- a light detection sensor arranged in or below the key sheet;
- and
- an electric circuit, arranged below the key sheet, for processing a signal output from the light detection sensor, the electric circuit being covered by the key sheet, and the key sheet being formed from a material that is water resistant and translucent.
Dependencies are inferred from the claim text.