Patent ID: 7664436

Claim:
A color electrophotographic image forming apparatus which forms an image on a recording medium, the color electrophotographic image forming apparatus comprising: an electrophotographic photosensitive drum; a rotary supporting member which supports a plurality of developing devices for developing an electrostatic latent image formed on the electrophotographic photosensitive drum, and rotates to sequentially move in a rotating direction the supported plurality of developing devices to a development position at which the electrostatic latent image is developed; a motor; a pivotally movable member which pivotably supports the rotary supporting member; a rotary member which rotates integrally with the rotary supporting member which rotates while receiving a rotating force from the motor, the rotary member including a spacing portion for moving one of the plurality of developing devices which is supported by the rotary supporting member to the development position in an intersecting direction intersecting with the rotating direction of the rotary supporting member, and a contacting portion for moving one of the plurality of developing devices to a retreat position to which one of the plurality of developing devices is retreated from the development position in the intersecting direction; and a regulating member which regulates a pivotal movement of the rotary supporting member in a state in which the regulating member is in contact with the contacting portion, the regulating member being disposed at a position facing the spacing portion which rotates according to a rotation of the rotary member at a distance in order to move one of the plurality of developing devices to the development position in the intersecting direction, and at a position in which the regulating member contacts the contacting portion which rotates according to the rotation of the rotary member in order to move one of the plurality of developing devices to the retreat position in the intersecting direction, wherein the rotary supporting member pivotally moves so that one of the plurality of developing devices is positioned at the development position in a state in which the regulating member is apart from the spacing portion, and so that one of the plurality of developing devices is positioned at the retreat position in a state in which the regulating member is in contact with the contacting portion.