Patent ID: 8346317

Claim:
An electronic device having rotary input members, comprising: a substantially cylindrical main body; at least one hollow rotary input member rotatably connected to the main body; at least one pair of pads arranged on the main body and beneath the at least one rotary input member, each of the at least one pair of pads comprising two pads spaced from each other; at least one selection contact arranged on an internal surface of each of the at least one rotary input member; and a processing unit comprising a common pin and at least one connection pin, one pad of each of the at least one pair of pads being electrically connected to one of the at least one connection pin, the other one pad of the at least one pair of pads being electrically connected to the common pin, and when a closed loop comprising a pair of pads, a selection contact and the processing unit is formed, the processing unit determining the characters according to a relationship table describing the relationship among the at least one connection pin, the at least one rotary input member, different currents, and input characters.