| 摘要 |
<p>A color electrophotographic image forming apparatus which simplifies a configuration in which a rotary (102) is rotated to change over respective developing devices (18a, 18b, 18c, 18d) to a development position (18X) to reduce the costs and save the space, and which simplifies the changeover operation to reduce an operating time. The image forming apparatus sequentially moves and changes over the respective developing devices supported by the rotary to the development position which faces a photosensitive drum (2) by the rotation of the rotary. The rotary is rotated to move the developing devices. A cam (101) is rotated integrally with the rotary, and thereby abutment portions (101e, 101f, 101g, 101h) of the cam are abutted against a regulating rotatable member (105) so that the developing devices are spaced from the photosensitive drum. In a state in which the developing devices are abutted against the photosensitive drum, the cam is spaced from the regulating rotatable member by recesses (101a, 101b, 101c, 101d) of the cam.</p> |
