Patent ID: 7809289
Filing Date: 2010-10-05
Classification: G03G

Abstract:
1. An image forming device, comprising: a device body; an image forming unit provided in the device body to form an image on a recording medium; a carrying unit detachably attached to the device body so as to carry a recording medium on a carrying route; a first detecting unit provided on the carrying route to output a detection signal that varies depending on whether there is a recording medium being carried on the carrying route, the first detecting unit including a movable portion configured to influence the detection signal depending on a location thereof; a displacing unit configured to change the location of the movable portion depending on whether the carrying unit is attached to the device body; and a determining unit configured to determine based upon the detection signal outputted by the first detecting unit whether there is a recording medium being carried on the carrying route and whether the carrying unit is attached to the device body, wherein the first detecting unit is configured to output a first signal when there is a recording medium being carried on the carrying route, wherein the first detecting unit is configured to output a second signal when there is not a recording medium being carried on the carrying route, wherein the displacing unit locates the movable portion in a first position where the first detecting unit is configured to output the second signal when the carrying unit is attached to the device body, wherein the displacing unit locates the movable portion in a second position where the first detecting unit cannot output the second signal when the carrying unit is detached from the device body, and wherein, when the first detecting unit outputs the second signal, the determining unit determines that there is not a recording medium being carried on the carrying route, and that the carrying unit is attached to the device body.