US Patent 7645950 Electronic apparatus having switch contacts

At least one exemplary embodiment is directed to an electronic apparatus includes a switch contact and a control unit. The switch contact is constituted of a fixed contact and a movable contact. The fixed contact includes a plurality of detection contacts and a common contact. The movable contact can be moved to a contact/noncontact state. The control unit detects a signal generated when all of the contacts in the fixed contact are simultaneously made conductive by contact of the movable contact.