Importance

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Abstract

An encoder module for use in an input device of a graphic user interface (GUI) is disclosed. The encoder module includes a disk key disposed outside a housing of the input device, an upright shaft coupled to the disk key, an encoder consisting of a fixed contact electrode formed on a circuit board and a rotatable contact electrode sleeved around the shaft, and a switch consisting of a conductive electrode formed on the circuit board and a sheet conductor mounted on the circuit board and spaced from the conductive electrode. By exerting a rotating force on the disk key, the rotatable contact electrode rotates accordingly to exhibit different contact status with the fixed contact electrode so as to generate a signal indicative of a rotation quantity. By exerting a pressing force on the disk key, the sheet conductor is deformed to be in contact with the conductive electrode so as to generate a signal indicative of a conductive state to complete the input operation.

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First Claim