An overturning prevention device includes a holding member disposed at a bottom surface portion of an apparatus, and an overturning prevention member configured to be held by the holding member. The apparatus includes a wheel unit including a wheel, a fitting portion, and a support shaft. The holding member is disposed at a position nearer to a center of the bottom surface portion than the support shaft when viewed from above. The overturning prevention member includes, a projecting portion configured to project outside the bottom surface portion, and a held portion configured to be held by the holding member, the projecting portion and the held portion being connected with each other. The overturning prevention member is configured to be attached to and detached from the holding member by being moved in an attaching direction in which the held portion and the projecting portion are connected.

An image forming apparatus includes a plurality of photosensitive members, a support frame configured to support the plurality of photosensitive members, and an electric unit including a first electric board and a second electric board, and fixed to the support frame. The electric unit includes a first supporting portion extending in an arrangement direction of the plurality of photosensitive members, a second supporting portion extending in the arrangement direction, and a board holding portion configured to hold the first electric board and the second electric board and bridged between the first supporting portion and the second supporting portion. The first electric board is positioned in the image forming apparatus more inward than at least one of the first supporting portion or the second supporting portion in a direction orthogonal to the arrangement direction and a vertical direction.

An apparatus includes a developer container to and from which a replenishment container is attachable and detachable and which includes an accommodating portion and a replenishment port, a transfer portion configured to transfer a developer image on an image bearing member onto a recording material, a supporting tray including a supporting surface configured to support the recording material thereon, and a discharge portion configured to discharge the recording material, onto which the developer image has been transferred, on the supporting surface, wherein the supporting surface has an opening portion opening such that the replenishment port is exposed through the supporting surface, and wherein an opening/closing member configured to be movable between a closed position where the opening/closing member covers the replenishment port and serves as a part of the supporting surface and an open position where the replenishment port is exposed is provided.

Movement and/or urging of a developer carrying member is carried out with high precision. A cartridge that is mountable to an apparatus main assembly of an image forming apparatus, the cartridge includes a developing roller; a frame supporting the developing roller; a movable part movably supported by the frame and movable to a first position and to a second position relative to the frame; and an elastic part provided between the frame and the movable part to urge the movable part. The movable part includes a first force receiving part that receives force from the apparatus main assembly, in a direction of moving from the first position to the second position, and a second force receiving part that receives force from the apparatus main assembly, in a direction of moving from the second position to the first position. When the movable part receives force from the apparatus main assembly at the first force receiving part and is at the second position, the movable part receives urging force from the elastic part in a direction of moving the movable part from the second position to the first position.

An electronic apparatus includes a first electronic device, a second electronic device, a bundled wire configured to supply at least one of an electric signal and electric power between the first and the second electronic devices, a frame member, a bundled wire guide, and a plurality of holding portions disposed at different positions on the wiring path. Each of the plurality of the holding portions includes a hinge portion connected to an upper portion of one of the pair of the side wall portions, a cover portion connected to the storage portion via the hinge portion, and an engagement portion to secure the cover portion in a closed position. The frame member includes a groove portion to which the bundled wire guide is fitted, and the bundled wire guide with the bundled wire stored is fitted into the groove portion.

An image forming apparatus includes an apparatus housing, and an imaging module that is removably installed in the apparatus housing. The imaging module includes an image carrier unit that is capable of carrying an image, an image writer unit that writes an image on the image carrier unit, and a module housing that registers and removably holds the image carrier unit and the image writer unit. A fastening unit that registers the module housing with respect to the apparatus housing and that removably fastens the module housing is disposed between the apparatus housing and the module housing.

A metal frame of an image forming apparatus including an image forming unit which forms an image on a sheet, comprising: a first support which supports the image forming unit; and a second support which is arranged with an interval from the first support and supports the image forming unit together with the first support; wherein the second support includes: a first sheet metal which includes a first flat surface portion in which a through-hole is formed and a bent and raised portion which is bent and raised from the first flat surface portion at a position adjacent to the through-hole, and a second sheet metal which is supported to the first sheet metal on the first sheet metal and includes a second flat surface portion which is sandwiched between the first flat surface portion and the bent and raised portion and a protruded portion which protrudes from the second flat surface portion in a plate thickness direction of the second flat surface portion at a position overlapping with the through-hole in a vertical direction.

An image forming apparatus includes an image forming unit configured to form an image on a recording medium, a first frame and a second frame configured to support the image forming unit, the first frame and the second frame being provided to sandwich the image forming unit, an outer casing member extending along a surface of the first frame configured to cover the first frame, and an electronic circuit substrate that is provided on a side opposite to the image forming unit via the surface of the first frame, and is provided between the first frame and the outer casing member, wherein the electronic circuit substrate extends in a direction crossing a surface of the outer casing member.

An image forming apparatus includes an attaching and detaching unit, an attached and detached section, and a pressing member. The attaching and detaching unit includes a developing device including a developer bearer to develop a latent image on a latent image bearer and is detachably attached to the attached and detached section. The attached and detached section includes the latent image bearer, a main reference portion, and a sub-reference portion. The main reference portion contacts a main reference part of the attaching and detaching unit. The sub-reference portion contacts a sub-reference part of the attaching and detaching unit. The pressing member presses the attaching and detaching unit to generate a biasing force biasing the developer bearer toward the latent image bearer and a rotational moment toward the sub-reference portion of the attached and detached section around the main reference part with respect to the attaching and detaching unit.

An image forming apparatus includes a first casing, a second casing, a support portion, an indication, and a USB port. The first casing includes a sheet discharge tray disposed at a top surface thereof. The indication is located at a portion of one of the top surface of the first casing and the support portion, and is positioned outside the sheet discharge tray in a width direction. The portion is located closer to one end of the image forming apparatus in the width direction than the other end of the image forming apparatus opposite to the one end in the width direction. The USB port is disposed at a portion of one of the second casing and the support portion closer to the one end than the other end in the width direction, and is located at a different position in an up-down direction from the indication.