Patent ID: 8736918

Claim:
An overhead scanner, comprising: a main body; a rotation unit supported by the main body so as to be rotatable around a rotation axis; an imaging unit that is mounted on the rotation unit and is configured to read a medium to be read that is placed on a placement surface located below the rotation unit in a vertical direction; a light source that irradiates the medium to be read with light; a driving unit that moves the rotation unit around the rotation axis in a direction toward a placement side, on which the medium to be read is placed; and a posture change detecting unit that detects posture change of the main body, wherein a standby position where the rotation unit is located when the imaging unit does not read the medium to be read is located in an opposite direction to the direction toward the placement side, and while the rotation unit is located at a readable position where the imaging unit is capable of reading the medium to be read, the driving unit moves the rotation unit around the rotation axis toward the standby position when it is determined that the main body falls down based on the posture change of the main body.