Patent ID: 7630680

Claim:
An image forming apparatus comprising: an image forming device configured to form an image on a recording material; a storage device adapted to accommodate the recording material, the storage device including a movable recording material supporting member supporting the recording material thereon; a detecting device configured to detect the recording material accommodated in the storage device, wherein the image forming device is controlled on the basis of detection outputs from the detecting device, wherein the detecting device is positioned facing the recording material supporting member and is able to come into contact with the recording material supported on the recording material supporting member; a supporting portion supporting the detecting device so as to be rotatable; a holding portion holding the supporting portion so as to be movable; a first biasing member biasing the supporting portion from the holding portion toward the recording material; and a second biasing member biasing the detecting device from the supporting portion toward the recording material, wherein the biasing force of the first biasing member is larger than the biasing force of the second biasing member.