| 摘要 |
The object of the invention is to provide a small-size image forming apparatus in which a plurality of light emitting element arrays are easily aligned with each other at high accuracy. Each of light emitting element arrays of Y, M, C, K comprises a plurality of LED elements arranged in a straight line and is driven by a color image signal of each color. On the reference plate disposed on the support are arranged head substrates having light emitting element arrays of each color in such a manner that the light emitting element arrays are nearly in parallel with each other. On a peripheral surface of each photosensitive drum, an electrostatic latent image forming position is established where an electrostatic image is formed by receiving light from each of the light emitting element arrays, and toner of the specified color is supplied to the specified electrostatic latent image forming apparatus by each developing device. In this kind of image forming apparatus, by mounting the fight emitting element arrays on the reference plate, the light emitting element arrays can be easily aligned with each other at high accuracy. In addition, by adjusting the screwing degree of the screw member formed in the reference plate into the screw hole formed in the support, the light irradiation angle of the light emitting element arrays to the photosensitive drums can be easily changed.
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