Patent ID: 8744310

Claim:
A detachable unit configured to be attached to a unit-receiving apparatus, the detachable unit comprising: a unit body; a rotary member supported by the unit body and having a through hole configured to receive a rotary shaft, the through hole extending in an attaching and detaching direction in which the detachable unit is attached to and detached from the unit-receiving apparatus; an urging member urging the rotary member toward a downstream side in an attaching direction in which the detachable unit is attached to the unit-receiving apparatus; a contact-receiving portion provided at a position of the rotary member on the downstream side in the attaching direction and being configured to be pressed against a contact portion provided on the rotary shaft toward an upstream side in the attaching direction when the detachable unit is attached to the unit-receiving apparatus; a first support-receiving portion provided at one end of the rotary member; a second support-receiving portion provided at the other end of the rotary member; a first support provided at a position of the unit body corresponding to the position of the first support-receiving portion; a second support provided at a position of the unit body corresponding to the position of the second support-receiving portion; a first rotary support member provided between the first support-receiving portion and the first support and supporting the one end of the rotary member such that the rotary member is rotatable, the first rotary support member being supported in such a manner as to be movable in the attaching and detaching direction relative to at least one of the first support-receiving portion and the first support; and a second rotary support member provided between the second support-receiving portion and the second support and supporting the other end of the rotary member such that the rotary member is rotatable, the second rotary support member being supported in such a manner as to be movable in the attaching and detaching direction relative to at least one of the second support-receiving portion and the second support, wherein the rotary member is rotatably supported by the unit body when the rotary shaft is not present.