Image forming apparatus having link mechanism for positioning cartridge

An image forming apparatus comprising:

• a cartridge that includes a rotating body configured to rotate and to bear toner, wherein the cartridge includes a portion-to-be-pressed and a portion-to-be-positioned;
• and
• an apparatus main body to which the cartridge is mounted in a mounting direction, wherein the apparatus main body includes a linkage mechanism and includes a positioning portion configured to position the cartridge with respect to the apparatus main body in the mounting direction by coming in contact with the portion-to-be-positioned of the cartridge,
• wherein the link mechanism includes
• a frame,
• a first link having a first end portion and a second end portion opposite to the first end portion in a longitudinal direction of the first link, wherein the first end portion is connected to the frame so as to pivot around a pivot axis, and the second end portion of the first link is provided with a hole portion, and
• a second link including a mounting portion on which the cartridge is mounted and a pressing portion configured to press the cartridge in the mounting direction by coming in contact with the portion-to-be-pressed of the cartridge, wherein the second link is provided with a protrusion extending in a direction of the pivot axis and engaging with the hole portion of the first link, and wherein the second link is pivotable, relative to the first link, at a joint portion at which the second link protrusion engages with the hole portion of the first link,
• wherein the second link protrusion includes a cylinder portion and a protruding portion that protrudes to an outside of an imaginary circle of a cylindrical surface of the cylinder portion when viewed in the pivot axis direction,
• wherein the linkage mechanism is configured such that, with interlocking with a pivotal movement of the first link around the pivot axis in a predetermined pivot direction, the second link is moved from a first position to a second position, wherein the first position is a position in which the cartridge is to be mounted to, and detached from, the mounting portion of the second link, and wherein the second position is a position for image forming, and
• wherein, when the second link is at the second position, the protruding portion of the second link protrusion presses an inner surface of the hole portion of the first link such that a rotational moment around the pivot axis in the predetermined pivot direction acts on the first link and, in a state where the portion-to-be-pressed of the cartridge is pressed by the pressing portion of the second link, the portion-to-be positioned of the cartridge comes in contact with the positioning portion of the apparatus main body.