Keyboard input device
AssigneeAlps Electric Co., Ltd.
InventorHideki Ito
Life of this patent
Estimating the term…
Abstract
A keyboard input device comprises a lever-mounting plate for supporting the lower ends of a pair of lever members in an engaged manner, a circuit board on which the lever-mounting plate is placed and is forming a circuit pattern on a surface facing the lever-mounting plate, a hollow rubber spring adhered onto the circuit board, and a key top supported by the pair of lever members and is urged by the elastic urging force of the rubber spring in a direction to separate away from the circuit board, wherein the circuit board has an insulating layer for insulating and covering the circuit pattern, the insulating layer having a surface area larger than that of the lever-mounting plate permitting the lever-mounting plate to be placed thereon via an uppermost layer.
Claims3
A keyboard input device comprising a pair of lever members rotatably coupled at intersecting portions, a lever-mounting plate for supporting lower ends of the pair of lever members in an engaged manner, a circuit board on which the lever-mounting plate is placed and is forming a circuit pattern on a surface facing the lever-mounting plate, a hollow rubber spring mounted on the circuit board, and a key top supported by the pair of lever members and is urged by the elastic urging force of the rubber spring in a direction to separate away from the circuit board, wherein the circuit board forms an insulating layer for insulating and covering the circuit pattern, the insulating layer having a surface area larger than that of the lever-mounting plate permitting the lever-mounting plate to be placed thereon.
Dependencies are inferred from the claim text.