| 摘要 |
PROBLEM TO BE SOLVED: To make exactly detectable that the storage amount of a developer having magnetism, collected and accumulated in a recovery container reaches a prescribed level by the magnetic sensor with a simple constitution, without causing a cost increase in a developer recoverying system. SOLUTION: The magnetic sensor 60 which detects that the storage amount of the developer GO(TO) in the recovery container 40 reaches a prescribed level is disposed on a device main body 1 side so that a detection surface 61 may face the recovery container 40. And, at least the region 45 opposed to the detection surface 61 of the magnetic sensor is constituted into the transformable structure deformed on the outer side of the recovery container 40 by being pushed with the accumulated developer GO (TO) of the recovery container 40 in the recovery container 40. |
