Patent ID: 6970671
Filing Date: 2005-11-29
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a plurality of developing devices for developing an electrostatic image formed on an image bearing member; and a rotary member holding said plurality of developing devices for selectively moving any one of said developing devices to a developing position, wherein each of said plurality of developing devices has a first developer carrying member and a second developer carrying member for developing the electrostatic image with developers carried thereby, respectively, wherein each of said plurality of developing devices is held by said rotary member so as to be relatively rockable with respect to said rotary member, wherein when the one of said developing devices is in the developing position, said first developer carrying member and said second developer carrying member of one of said developing devices are positioned in predetermined positions with respect to the image bearing member, respectively, wherein each of said plurality of developing devices has an abutting member for abutting against a guide portion provided on an apparatus main body to ensure a distance between said second developer carrying member and the image bearing member, wherein each of said plurality of developing devices is rockable about a rocking center centered on a rotation center of said first developer carrying member, and wherein when the one of said developing devices is in the developing position, said first developer carrying member is disposed in the one of said developing devices so that said first developer carrying member is opposed to the image bearing member with a predetermined distance between said first developer carrying member and the image bearing member, and said abutting member abuts against said guide portion.