To provide an equipment provided with a rotary cover in which a sensor correctly detects the opening/closing condition of a cover by installing a reflection type optical sensor to detect the opening/closing condition of the cover in a place invisible from an operator of the equipment and difficult to be affected by the oscillation of the equipment to prevent the sensor from being manually operated by the operator of the equipment.

An equipment is provided with a cover 29 which is turnably supported by a longitudinal wall 13 of a base, and a reflection type optical sensor 33 comprising a light transmission part 35 to transmit the light toward the cover 29 side and a light reception part 36 to receive the reflected light from the cover side is embedded in a part which is in the vicinity of a supporting shaft 30 to turnably support the cover and constantly covered by the cover 29 in the longitudinal wall 13. A reflecting material 38 to reflect the light from the light transmission part 35 to the light reception part 36 in the condition where the cover 29 is closed is attached to a surface opposite to the sensor 33 in the cover 29.