Patent ID: 8878085

Claim:
An input device comprising: a circuit board comprising a first surface, a second surface formed opposite to the first surface, and a plurality of conductive sheets, a plurality of holes and perforations being formed on the circuit board and the perforations being deployed around each of the holes in pairs, the conductive sheets being provided adjacent to the holes in pairs on the first surface and each of the conductive sheets comprising a coupling section, the coupling section being bent away from the first surface and the second surface; a plurality of mechanical switches detachably provided on the second surface of the circuit board, each of the mechanical switches comprising a plunger, a plurality of pins, and a positioning column extended from the bottom of the mechanical switch, the positioning column being inserted in the hole, the pin being connected to the plunger at one end and passing through the circuit board at the other end to contact with the coupling section of the conductive sheet, and the mechanical switches are electrically connected to the circuit board respectively; and a plurality of bases disposed on the second surface of the circuit board, wherein each of the bases comprises a depression and a latching portion, the latching portion of each base is disposed on an outer edge of the depression, a fastening hole and a plurality of insulating holes are formed on the bottom of the depression, the mechanical switch is engaged with the depression, the positioning column is inserted in the hole through the fastening hole, the pins pass through the insulating holes correspondingly.