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US 7,094,984 B2Granted
Key switch and keyboard input device using the same
AssigneeAlps Electric Co., Ltd.
InventorKazuhiro Yokoyama
Life of this patent
Estimating the term…
Abstract
A key top of a key switch is formed so as to extend in a horizontal direction, not in a vertical direction. On a rear surface of the key top, a reinforcing member that horizontally extends is mounted on one end portion in the vertical direction and a torsion bar that horizontally extends is rotatably supported on the other end portion in the vertical direction. When the key top is pressed against a biasing force of an elastic member, the reinforcing member prevents the key top from deforming.
Claims14
A key switch comprising:
- a pair of lever members;
- a key top that is elevatably supported by the pair of lever members;
- and
- an elastic member that elastically biases the key top upward,
- wherein the key top has a reinforcing member that, when the key top is pressed against a biasing force of the elastic member, prevents the key top from deforming,
- the key top is formed so as to extend in a horizontal direction, not in a vertical direction, and
- on a rear surface of the key top, the reinforcing member that horizontally extends is mounted on one end portion in the vertical direction and a torsion bar that horizontally extends is rotatably supported on another end portion in the vertical direction.
4 more elements
A key switch comprising:
- a pair of lever members;
- a key top that is elevatably supported by the pair of lever members;
- and
- an elastic member that elastically biases the key top upward,
- wherein the key top has a reinforcing member that, when the key top is pressed against a biasing force of the elastic member, prevents the key top from deforming,
- the reinforcing member is made of a metal plate and has a rectangular cross-sectional shape in which a length in a width direction of the plate is larger than a length in a thickness direction of the plate, and
- the reinforcing member is mounted on a rear surface of the key top such that the width direction of the reinforcing member is orthogonal to the rear surface of the key top.
4 more elements
A key switch comprising:
- a pair of lever members;
- a key top that is elevatably supported by the pair of lever members;
- and
- an elastic member that elastically biases the key top upward,
- wherein the key top has a reinforcing member that, when the key top is pressed against a biasing force of the elastic member, prevents the key top from deforming,
- on a rear surface of the key top, an outer circumferential wall is provided to surround an outer circumferential portion and a supporting portion that supports an upper end portion of one of the pair of lever members is provided, and
- the reinforcing member is interposed between the outer circumferential wall and the supporting portion.
4 more elements
A key switch comprising:
- a pair of lever members;
- a key top that is elevatably supported by the pair of lever members;
- and
- an elastic member that elastically biases the key top upward,
- wherein the key top has a reinforcing member that, when the key top is pressed against a biasing force of the elastic member, prevents the key top from deforming,
- the reinforcing member has a horizontally long portion and bent portions which are formed by bending both ends of the long portion so as to face each other, and
- the long portion and the bent portions are mounted on the rear surface of the key top.
4 more elements
Dependencies are inferred from the claim text.