JP2010164993A5 - - Google Patents

Claims (13)

In an image forming apparatus for forming an image on a recording medium to which a cartridge can be attached and detached,
A positioning part for positioning the cartridge;
A first position for positioning the cartridge in the positioning portion when the cartridge is mounted on the apparatus main body of the image forming apparatus; and a longitudinal position of the cartridge with respect to the apparatus main body retracted from the first position. A urging member that is movable between a second position that allows the cartridge to be detachable from a direction and that urges the cartridge toward the positioning portion at the first position. A moved member,
A guide member that is movably provided with respect to the moving member, and guides the cartridge by projecting from an opening provided in the moving member when the moving member is located at the second position. Taking a position, and when the moving member is located at the first position , a guide member that retracts from the guide position toward the opening and takes a separated position away from the cartridge;
An image forming apparatus comprising:   The moving member is provided with a plurality of urging members, and the guide member is provided between the urging members in a mounting direction in which the cartridge is mounted on the apparatus main body. The image forming apparatus according to claim 1. The amount of protrusion of the guide member from the opening at the guide position is such that the biasing member protrudes from the surface of the moving member provided with the opening when the moving member is located at the second position. The image forming apparatus according to claim 1 , wherein the image forming apparatus has the same amount. The biasing member is a spring and a pressing portion provided at a tip of the spring, and protrudes from a second opening provided in the moving member, and the cartridge is mounted on the apparatus main body of the image forming apparatus. 4. The image forming apparatus according to claim 1 , further comprising: a pressing portion that comes into contact with the cartridge when the cartridge is pressed. 5. The cartridge is a process cartridge having a photosensitive member and a developing unit that develops the electrostatic latent image formed on the photosensitive member using a developer, and the image forming apparatus is developed by the developing unit. wherein the developed image formed on the photosensitive member, a belt for transferring the recording medium, any one of claims 1 to 4, characterized in that it has a belt which is provided above the moving member The image forming apparatus described in the item. When the process cartridge is mounted on the apparatus main body and the moving member is located at the first position, the photosensitive member and the belt are in contact with each other, and the moving member is located at the second position. 6. The image forming apparatus according to claim 5 , wherein the process cartridge can be attached to and detached from the apparatus main body with the photosensitive member and the belt being separated from each other. The guide member is engaged with the process cartridge to prevent the process cartridge from contacting the belt when the moving member is located at the second position and the process cartridge is attached or detached. The image forming apparatus according to claim 5, further comprising a restricting portion that restricts the process cartridge from moving in a direction toward the belt. The image forming apparatus according to claim 7 , wherein the restricting portion is an engaging portion that engages with a groove provided in the process cartridge. The image forming apparatus according to claim 7 , wherein the restricting portion is a groove that engages with a protruding portion provided in the process cartridge. The guide member according to claim wherein said moving member when the position of the second position, the guide member for locating in said guide position, characterized in that it has the device body and the support portion abutting The image forming apparatus according to any one of 1 to 9 . The guide member, when the movable member is positioned in the first position, the support portion is spaced apart from the apparatus main body, according to claim 10, characterized in that it is held by the moving member Image forming apparatus. The image forming apparatus according to claim 1 , wherein the image forming apparatus includes a plurality of moving members, and a plurality of the cartridges can be attached and detached. The moving member is a thrust urging member for positioning the cartridge in the longitudinal direction with respect to the apparatus main body, and is provided with a thrust provided rotatably in an attaching / detaching direction for attaching / detaching the cartridge to / from the apparatus main body. The image forming apparatus according to claim 1, further comprising a biasing member.