In a navigation apparatus having: a base unit (10) that is fastenable to a vehicle and is equipped with at least a microcomputer; and a front panel unit (14) that is attachable to and detachable from the base unit and is equipped with at least a display (1...

A movable robot (1) includes a main body unit (2), and at least three wheel units (4a,4b,4c) connected with the main body unit (2). The wheel units (4a,4b,4c) have respective contact portions (6a,6b,6c) for contact with a floor surface (8). The contact por...