Abstract: An image forming apparatus includes a drum unit, an optical print head, a moving mechanism, a moving mechanism supporting member, a main assembly, a flexible flat cable, a first cover portion made of a resin material and provided in the supporting member so as to cover a first portion of a cutting plane of the opening, the first portion opposing one surface of the flexible flat cable, and a second cover portion made of a resin material and provided in the supporting member so as to cover a second portion of the cutting plane of the opening, the second portion opposing the other surface of the flexible flat cable.

Abstract: An image forming apparatus includes a cover pivotable on a body to close an opening at a closed position and open the opening at an open position, first and second replacement units having photosensitive drums, an optical print head pivotable in one direction, a spring, and a stopper. The spring applies, to the optical print head, a force for allowing the optical print head to pivot toward the one direction so that a movement of the optical print head with a pivotal movement of the cover from the open position to the closed position is prevented from being inhibited by the first developing cartridge. The optical print head, having the force applied the optical print head by the spring, so that movement of the optical print head with pivotal movement of the cover from the open to the closed position is prevented from being inhibited by the second developing cartridge.

Abstract: An image forming apparatus includes a cover pivotable on a body to close an opening at a closed position and open the opening at an open position, first and second replacement units having photosensitive drums, an optical print head pivotable in one direction, a spring, and a stopper. The spring applies, to the optical print head, a force for allowing the optical print head to pivot toward the one direction so that a movement of the optical print head with a pivotal movement of the cover from the open position to the closed position is prevented from being inhibited by the first developing cartridge. The optical print head, having the force applied the optical print head by the spring, so that movement of the optical print head with pivotal movement of the cover from the open to the closed position is prevented from being inhibited by the second developing cartridge.

Abstract: An image forming apparatus includes a main assembly, a photosensitive drum, an optical print head, a receiving portion, a portion-to-be-engaged, and a guiding portion. The guiding portion is provided between the portion-to-be-engaged and the receiving portion with an interval from both the portion-to-be-engaged and the receiving portion. The guiding portion guides movement of a cleaning member in a direction from the receiving portion toward the portion-to-be-engaged while limiting movement of the cleaning member in a direction different from the longitudinal direction of the cleaning member to engage the engaging portion with the portion-to-be-engaged.

Abstract: An image forming apparatus includes a main assembly, a photosensitive drum, an optical print head, a receiving portion, a portion-to-be-engaged, and a guiding portion. The guiding portion is provided between the portion-to-be-engaged and the receiving portion with an interval from both the portion-to-be-engaged and the receiving portion. The guiding portion guides movement of the cleaning member in a direction from the receiving portion toward the portion-to-be-engaged while limiting movement of the cleaning member in a direction different from the longitudinal direction of the cleaning member to engage the engaging portion with the portion-to-be-engaged.

Abstract: An image forming apparatus includes a drum unit, an optical print head, a moving mechanism, a moving mechanism supporting member, a main assembly, a flexible flat cable, a first cover portion made of a resin material and provided in the supporting member so as to cover a first portion of a cutting plane of the opening, the first portion opposing one surface of the flexible flat cable, and a second cover portion made of a resin material and provided in the supporting member so as to cover a second portion of the cutting plane of the opening, the second portion opposing the other surface of the flexible flat cable.