Abstract: An image forming apparatus includes a main body; a process unit configured to be attached to and removed from the main body, the process unit being configured to integrally hold a plurality of image carriers arranged in a first direction; a plurality of developing cartridges provided in corresponding association with the image carriers, the developing cartridges configured to be attached to and removed from the process unit, each of the developing cartridges including a corresponding developer carrier, each of the developing cartridges being configured to supply developer to a corresponding image carrier; and a pressing mechanism provided in the main body, the pressing mechanism configured to press the developing cartridges, when attached to the process unit, in a direction that the developer carriers contact the image carriers.

Abstract: An image forming apparatus includes a main body; a process unit configured to be attached to and removed from the main body, the process unit being configured to integrally hold a plurality of image carriers arranged in a first direction; a plurality of developing cartridges provided in corresponding association with the image carriers, the developing cartridges configured to be attached to and removed from the process unit, each of the developing cartridges including a corresponding developer carrier, each of the developing cartridges being configured to supply developer to a corresponding image carrier; and a pressing mechanism provided in the main body, the pressing mechanism configured to press the developing cartridges, when attached to the process unit, in a direction that the developer carriers contact the image carriers.

Abstract: An image forming apparatus includes a main body; a process unit configured to be attached to and removed from the main body, the process unit being configured to integrally hold a plurality of image carriers arranged in a first direction; a plurality of developing cartridges provided in corresponding association with the image carriers, the developing cartridges configured to be attached to and removed from the process unit, each of the developing cartridges including a corresponding developer carrier, each of the developing cartridges being configured to supply developer to a corresponding image carrier; and a pressing mechanism provided in the main body, the pressing mechanism configured to press the developing cartridges, when attached to the process unit, in a direction that the developer carriers contact the image carriers.

Abstract: An image forming apparatus includes a main body; a process unit configured to be attached to and removed from the main body, the process unit being configured to integrally hold a plurality of image carriers arranged in a first direction; a plurality of developing cartridges provided in corresponding association with the image carriers, the developing cartridges configured to be attached to and removed from the process unit, each of the developing cartridges including a corresponding developer carrier, each of the developing cartridges being configured to supply developer to a corresponding image carrier; and a pressing mechanism provided in the main body, the pressing mechanism configured to press the developing cartridges, when attached to the process unit, in a direction that the developer carriers contact the image carriers.

Abstract: An image forming apparatus includes a main body; a process unit configured to be attached to and removed from the main body, the process unit being configured to integrally hold a plurality of image carriers arranged in a first direction; a plurality of developing cartridges provided in corresponding association with the image carriers, the developing cartridges configured to be attached to and removed from the process unit, each of the developing cartridges including a corresponding developer carrier, each of the developing cartridges being configured to supply developer to a corresponding image carrier; and a pressing mechanism provided in the main body, the pressing mechanism configured to press the developing cartridges, when attached to the process unit, in a direction that the developer carriers contact the image carriers.

Abstract: An image-forming device includes image carrying members aligned in a first direction in a main casing, one of the image carrying members being for black color, and remaining ones of the image carrying members being for other colors; a developing members provided in one-to-one correspondence with the image carrying members, each of the developing members configured to contact a corresponding image carrying member, one of the developing members being for black color, and remaining ones of the developing members being for other colors r; and a first contact/separation member linearly movable in the first direction, the first contact/separation member being disposed on one side of the plurality of developing members. The first contact/separation member comprises an elongated shape in the first direction. The first contact/separation member comprises a separating surfaces configured to contact respective developing members to separate the developing member from the image carrying member.

Abstract: An image forming apparatus includes a main body; a process unit configured to be attached to and removed from the main body, the process unit being configured to integrally hold a plurality of image carriers arranged in a first direction; a plurality of developing cartridges provided in corresponding association with the image carriers, the developing cartridges configured to be attached to and removed from the process unit, each of the developing cartridges including a corresponding developer carrier, each of the developing cartridges being configured to supply developer to a corresponding image carrier; and a pressing mechanism provided in the main body, the pressing mechanism configured to press the developing cartridges, when attached to the process unit, in a direction that the developer carriers contact the image carriers.

Abstract: A laser printer includes a contact/separation mechanism that linearly moves developing cartridges between contact positions where the developing cartridges contact corresponding photosensitive drums and separating positions where the developing cartridges separate from the photosensitive drums. The contact/separation mechanism includes a pair of contact/separation members and a synchronous moving mechanism. The contact/separation members are disposed one on one side of the developing cartridges and another on another side of the developing cartridges. The synchronous moving mechanism is for linearly moving the contact/separation members in synchronization with each other.

Abstract: A laser printer includes a contact/separation mechanism that linearly moves developing cartridges between contact positions where the developing cartridges contact corresponding photosensitive drums and separating positions where the developing cartridges separate from the photosensitive drums. The contact/separation mechanism includes a pair of contact/separation members and a synchronous moving mechanism. The contact/separation members are disposed one on one side of the developing cartridges and another on another side of the developing cartridges. The synchronous moving mechanism is for linearly moving the contact/separation members in synchronization with each other.

Abstract: An image forming device is provided to be able to make efficient use of an internal space while improving the detection accuracy, with which a detected body is detected. The image forming device according to the invention comprises a housing, a duct, through which an air in the housing is caused to flow, a detection portion arranged outside the duct to be displaced according to the presence of, or movement of a detected body, an operating portion that can be displaced in the duct, a detection element arranged in the duct to detect displacement of the operating portion, and a transmission portion that transmits displacement of the detection portion to the operating portion through an opening formed on the duct.

Abstract: A laser printer includes a contact/separation mechanism that linearly moves developing cartridges between contact positions where the developing cartridges contact corresponding photosensitive drums and separating positions where the developing cartridges separate from the photosensitive drums. The contact/separation mechanism includes a pair of contact/separation members and a synchronous moving mechanism. The contact/separation members are disposed one on one side of the developing cartridges and another on another side of the developing cartridges. The synchronous moving mechanism is for linearly moving the contact/separation members in synchronization with each other.

Abstract: A laser printer includes a contact/separation mechanism that linearly moves developing cartridges between contact positions where the developing cartridges contact corresponding photosensitive drums and separating positions where the developing cartridges separate from the photosensitive drums. The contact/separation mechanism includes a pair of contact/separation members and a synchronous moving mechanism. The contact/separation members are disposed one on one side of the developing cartridges and another on another side of the developing cartridges. The synchronous moving mechanism is for linearly moving the contact/separation members in synchronization with each other.

Abstract: A laser printer includes a contact/separation mechanism that linearly moves developing cartridges between contact positions where the developing cartridges contact corresponding photosensitive drums and separating positions where the developing cartridges separate from the photosensitive drums. The contact/separation mechanism includes a pair of contact/separation members and a synchronous moving mechanism. The contact/separation members are disposed one on one side of the developing cartridges and another on another side of the developing cartridges. The synchronous moving mechanism is for linearly moving the contact/separation members in synchronization with each other.

Abstract: An image forming device is provided to be able to make efficient use of an internal space while improving the detection accuracy, with which a detected body is detected. The image forming device according to the invention comprises a housing, a duct, through which an air in the housing is caused to flow, a detection portion arranged outside the duct to be displaced according to the presence of, or movement of a detected body, an operating portion that can be displaced in the duct, a detection element arranged in the duct to detect displacement of the operating portion, and a transmission portion that transmits displacement of the detection portion to the operating portion through an opening formed on the duct.

Abstract: A swinging gear is constructed to be swingable in accordance with the rotational direction of a main gear. A first gear train is arranged to drive a black developing unit by meshing with the swinging gear when the main gear is rotated in a first direction. A second gear train is arranged to drive developing units for colors such as yellow by meshing with the swinging gear when the main gear is rotated in a second direction reverse to the first direction.

Abstract: In an image-forming device including an image-carrying member, a developer-carrying member, and a casing having an inner space in which developer is accommodated and the developer-carrying member is supported, both a pushing force and a separating force are not applied to the casing so that the thickness of the casing does not need to be increased. The casing is formed with a pair of first protruding parts each having an end that protrudes outward along the axial direction of the developer-carrying member, and a pair of second protruding parts each having an end that protrudes farther outward than the corresponding end of the first protruding part. The first protruding parts serve as operating parts operated by a pressing member, and the second protruding parts serve as operating parts operated by a separating member.

Abstract: A laser printer includes a contact/separation mechanism that linearly moves developing cartridges between contact positions where the developing cartridges contact corresponding photosensitive drums and separating positions where the developing cartridges separate from the photosensitive drums. The contact/separation mechanism includes a pair of contact/separation members and a synchronous moving mechanism. The contact/separation members are disposed one on either side of the developing cartridges. The synchronous moving mechanism is for linearly moving the contact/separation members with synchronization with each other.

Abstract: A swinging gear is constructed to be swingable in accordance with the rotational direction of a main gear. A first gear train is arranged to drive a black developing unit by meshing with the swinging gear when the main gear is rotated in a first direction. A second gear train is arranged to drive developing units for colors such as yellow by meshing with the swinging gear when the main gear is rotated in a second direction reverse to the first direction.

Abstract: In an image-forming device including an image-carrying member, a developer-carrying member, and a casing having an inner space in which developer is accommodated and the developer-carrying member is supported, both a pushing force and a separating force are not applied to the casing so that the thickness of the casing does not need to be increased. The casing is formed with a pair of first protruding parts each having an end that protrudes outward along the axial direction of the developer-carrying member, and a pair of second protruding parts each having an end that protrudes farther outward than the corresponding end of the first protruding part. The first protruding parts serve as operating parts operated by the pressing member, and the second protruding parts serve as operating parts operated by the separating member.