Patent ID: 8112013

Claim:
An image forming device, comprising: a frame; a subunit detachably attached to the frame; a frame-side positioning portion provided to the frame; a subunit-side positioning portion provided to the subunit, the subunit-side positioning portion being configured to position the subunit relative to the frame by establishing contact with the frame-side positioning portion; a contact regulating member attached to the frame movably between a first location where the contact regulating member establishes contact with the subunit before the subunit-side positioning portion comes into contact with the frame-side positioning portion in process of the subunit being attached to the frame from a detached state and a second location where the contact regulating member is kept from contacting the subunit; a pressing member attached to the frame movably between a first position where the pressing member presses the subunit in such a first direction as to bring the subunit-side positioning portion into contact with the frame-side positioning portion and a second position where the pressing member is kept from pressing the subunit; and an interlocking member configured to interlock movement of the contact regulating member to the first location with movement of the pressing member to the first position and to interlock movement of the contact regulating member to the second location with movement of the pressing member to the second position.