Switch device

A switch device, comprising:

• an operation unit to receive an operation performed by a user;
• a single movable contact that is connected to a ground circuit and moves according to an operation performed on the operation unit;
• a plurality of fixed contacts whose state of connection to the movable contact is switched according to an operation position of the operation unit;
• a plurality of resistors connected in series in such a manner that one end is connected to a power supply, another end is connected to one of the plurality of fixed contacts, and a node formed between two resistors of the plurality of resistors is connected to the remaining of the plurality of fixed contacts;
• and
• a control unit that comprises an input terminal connected to a first node between the fixed contact connected closest to the power supply and a resistor and determines the operation position of the operation unit based on voltage detected through the input terminal,
• wherein the single movable contact is moveable into operation positions corresponding to contact with each of the plurality of fixed contacts.