Key switch
AssigneeSharp Kabushiki Kaisha
InventorsMasaji Takeshima, Kiyoshi Kinugawa
Life of this patent
Estimating the term…
Abstract
A key switch is provided with a depressable part having a contact set in its underside and held apart from a stationary contact located below it. The depressable part has a key switch surface located to one side of the center on the upper surface of the depressable part. The key switch is also provided with a rotation fulcrum in the center of the underside of the depressable part. The movable contact is located to one side of the center on the underside of the depressable part to allow the depressable part to turn on the fulcrum so that the movable and stationary contacts can touch each other.
Claims7
A key switch comprising;
- a depressable element;
- a key switch surface positioned to only one, first side of center on an upper surface of said depressable element, said key switch surface having at least a generally flat top portion;
- a flexible element allowing said depressable element to move vertically at least when a force substantially perpendicular to said flat top portion is applied to said key switch surface;
- rotation fulcrum means for permitting said depressable element to move in a predetermined direction when a second force which is nonperpendicular to said flat top portion is applied to said key switch surface;
- movable contact means positioned to another, second side of center on an underside of said depressable element, said first and second sides being on opposite sides of center of said depressable element;
- and
- stationary contact means adapted to touch said movable contact means when said depressable element rotates on said fulcrum means in the predetermined direction when said second force is applied to said key switch surface of said depressable element.
Dependencies are inferred from the claim text.