| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a color electrophotographic image forming apparatus which achieves a simplified configuration in which a rotary is rotated to change over each developing device to a development position to thereby enable the costs and the space of the color electrophotographic image forming apparatus to be reduced, and which achieves simplified changeover operation resulting in reduction in an operating time. <P>SOLUTION: The image forming apparatus sequentially moves and changes over the respective developing devices 18a to 18d supported by the rotary 102 to the development position which faces a photosensitive drum 2 by the rotation of the rotary 102. The rotary 102 is rotated to move the developing devices 18a to 18d. A cam 101 is rotated integrally with the rotary 102, and thereby abutment portions 101e to 101h of the cam 101 are abutted against a regulating rotatable member 105, so that the developing devices 18a to 18d are spaced from the photosensitive drum 2. In a state in which the developing devices 18a to 18d are abutted against the photosensitive drum 2, the cam 101 is spaced from the regulating rotatable member 105 by recesses 101a to 101d of the cam 101. <P>COPYRIGHT: (C)2009,JPO&INPIT |
