| 摘要 |
PURPOSE:To surely prevent erroneous detection and malfunction without increasing the number of wirings by specifying the connecting order of plural wirings at the time of attaching/detaching an attachable/detachable unit. CONSTITUTION:In an image forming device where plural wirings 14, 16, 22 and 24, a connector which connects and disconnects the wirings by attaching/ detaching the attachable/detachable unit, and a matrix detection circuit by time division are provided between a circuit on a device main body side and an electric circuit in the attachable/detachable unit, the wirings 16 and 24 on the reference side of active logic among the plural wirings 14, 16, 22 and 24 are connected earlier than the other wirings 14 and 22 at the time of attaching the attachable/detachable unit and disconnected later than the wirings 14 and 22 at the time of detaching the attachable/detachable unit. The connecting order of the plural wirings is easily and accurately set by making the position of the contact starting point of a terminal inside the connector different from the attaching/detaching direction of the attachable/detachable unit. |
