Keyswitch
AssigneeDarfon Electronics Corp.
InventorChi-Hwan Chen
Life of this patent
Estimating the term…
Abstract
A keyswitch uses a magnetic attraction force produced between and by a fixed part, fixedly disposed relative to a base, and a movable part, movably disposed relative to the base, as a driving force for returning a keycap to its original position. The movable part is between the fixed part and the base. The keyswitch also uses a force transmission part disposed between the keycap and the movable part as an intermediate for transferring force from the keycap to the movable part. When a force for pressing the keycap downward overcomes the magnetic attraction force, the movable part moves toward the base and then triggers a switch.
Claims17
A keyswitch, comprising:
- a base, comprising a switch and a connection structure;
- a keycap;
- a lift mechanism, connected to and between the connection structure and the keycap, the keycap is movable parallel to a movement direction relative to the base through the lift mechanism between an un-pressed position and a pressed position;
- a fixed part, disposed fixedly relative to the base between the base and the keycap, the fixed part having a first magnetic portion;
- a movable part, disposed movably relative to the base between the base and the fixed part, the movable part having a second magnetic portion and a trigger portion, a magnetic attraction force due to a magnetic attraction effect between the first magnetic portion and the second magnetic portion being exerted on the movable part, a direction of the magnetic attraction force pointing toward the first magnetic portion, the trigger portion and the switch being disposed oppositely, the trigger portion triggering the switch when the keycap is located at the pressed position;
- and
- a force transmission part, connected to and between the keycap and the movable part, when the keycap moves from the un-pressed position toward the pressed position, the keycap moving the movable part downward through the force transmission part to make the trigger portion triggers the switch.
Dependencies are inferred from the claim text.