An image formation apparatus according to an embodiment may include: an apparatus housing including a stacker and an opening provided at the stacker; a fixation device removably attached to the apparatus housing through the opening and including a handle rotatable between an upright position and a laid-flat position; and a laid-flat position-keeping detent mechanism. In a state where the fixation device is attached to the apparatus housing, a portion of the fixation device that is exposed from the opening provided at the stacker forms a portion of the stacker and a connector of the fixation device is mated to a connector of the apparatus housing. By at least a predetermined force being applied to the handle to transition the handle from the upright position to the laid-flat position, the laid-flat position-keeping detent mechanism allows the handle to transition to the laid-flat position and keeps the handle in the laid-flat position.

There is provided with a printing apparatus. A printing unit prints an image on a print medium. A heating unit heats the print medium with the image printed thereon. A detection unit detects a temperature of the heating unit. A housing accommodates the printing unit and the heating unit. An openable/closable cover member is provided on the housing and covers the heating unit. A restricting unit is capable of restricting an opening operation of the cover member. A control unit controls the restricting unit so as to execute the restriction if the temperature of the heating unit exceeds a first threshold value, and release the restriction if the temperature of the heating unit is not more than a second threshold value lower than the first threshold value.

A branch frame has a first guide surface and a second guide surface. In a state where a first cover is located at an open position, at least part of the first cover is located in a space through which a fixing device passes when the fixing device is detached from a mount portion, and the fixing device is unattachable to and undetachable from the mount portion through a first opening. In a state where the branch frame is attached to a main housing, at least part of the branch frame is located in the space, and the fixing device is unattachable to and undetachable from the mount portion through the first opening. In a state where the first cover and the branch frame are detached from the main housing, the fixing device is attachable to and detachable from the mount portion through the first opening.

A fixing device includes a first rotatable member with a heater, a second rotatable member contacting the first rotatable member and forming a fixing nip, a pressing unit pressing the first rotatable member to the second rotatable member in a pressing direction, a pair of side boards disposed with a space in the widthwise direction, and first, second and third stays supporting the pair of side boards. The first stay is provided upstream of a center of the fixing nip in the pressing direction and upstream of the center in a feeding direction of a recording material. The second stay is provided upstream of the center in the pressing direction and downstream of the center in the feeding direction. The third stay is provided downstream of the center in the pressing direction and at least one of upstream and downstream of the center in the feeding direction.

A protection member for attachment to a replacement component before the replacement component is inserted into a body of an apparatus, to protect the replacement component, the replacement component being to be inserted into the body of the apparatus so as to act as a part of the apparatus, the protection member includes: a contact portion configured to come into contact with the body of the apparatus at a stage where a portion of the replacement component on a front side in an insertion direction is inserted into the body of the apparatus while the protection member is attached to the replacement component, in which the protection member is removed at the stage where the portion is inserted into the body of the apparatus, so as to allow further insertion of the replacement component.

There is provided a guide incorporated in a fixing device including a belt configured to circularly move in a moving direction. The guide includes: a guide portion elongated in a longitudinal direction orthogonal to the moving direction; a first gate mark; and a second gate mark arranged spaced apart from the first gate mark in the longitudinal direction. The guide portion includes a resin and a plurality of elongated-shaped fillers dispersed in the resin. The guide portion has a guide surface configured to guide movement of the belt in the moving direction, a peripheral surface of the belt being configured to contact the guide surface.

A fixing device includes a first fixing member, a second fixing member, a heater, a temperature sensor, a sensor holder, and a first frame. The temperature sensor detects a temperature of the first fixing member or the second fixing member. The sensor holder is configured to hold the temperature sensor and is fixed on the first frame. The first frame is made of metal and includes a first bend, a second bend, a third bend, a first wall, a second wall, a third wall, and a fourth wall. The second wall is connected to the first wall via the first bend. The third wall is connected to the second wall via the second bend. The fourth wall is connected to the third wall via the third bend. The first wall and the second wall form an acute angle.

A protection member for attachment to a replacement component before the replacement component is inserted into a body of an apparatus, to protect the replacement component, the replacement component being to be inserted into the body of the apparatus so as to act as a part of the apparatus, the protection member includes: a contact portion configured to come into contact with the body of the apparatus at a stage where a portion of the replacement component on a front side in an insertion direction is inserted into the body of the apparatus while the protection member is attached to the replacement component, in which the protection member is removed at the stage where the portion is inserted into the body of the apparatus, so as to allow further insertion of the replacement component.

A fixing device includes a first fixing member, a second fixing member, a heater, a temperature sensor, a sensor holder, and a first frame. The temperature sensor detects a temperature of the first fixing member or the second fixing member. The sensor holder is configured to hold the temperature sensor and is fixed on the first frame. The first frame is made of metal and includes a first bend, a second bend, a third bend, a first wall, a second wall, a third wall, and a fourth wall. The second wall is connected to the first wall via the first bend. The third wall is connected to the second wall via the second bend. The fourth wall is connected to the third wall via the third bend. The first wall and the second wall form an acute angle.

An image forming apparatus includes a fixing device, a power supply, a toner container, a cover, a first harness, and a second harness. The power supply supplies power to the fixing device. The toner container compartment is between the fixing device and the power supply and receives a toner container. The cover is on the toner container compartment and moves into the toner container compartment. The first harness is coupled to the power supply, and the second harness is coupled to the fixing device. The second harness is detachably coupled to the first harness above the cover.