Patent ID: 8063924

Claim:
An image forming apparatus, comprising: an image forming section having: a photoconductive drum, an LED print head to write an image on a surface of the photoconductive drum, and a positioning section to maintain a certain degree of parallelization and a certain distance of the LED print head with respect to the photoconductive drum, having: a centering section engaging in a rotation manner at an end of a rotation axis of the photoconductive drum or an end of the photoconductive drum so as to move an end of the LED print head along a circular arc substantially concentrically to the rotation axis of the photoconductive drum; an LED print head positioning member fixed onto the centering section for positioning the LED print head; and a rotation direction determination section which is arranged at the image forming apparatus main body side for fixing the centering section after rotating the centering section so that the certain degree of parallelization of a light emitting surface of the LED print head with respect to the surface of the photoconductive drum is obtained; wherein an adjustment of the degree of the parallelization is achieved by rotating the centering section in a direction of a circumference of the photoconductive drum so as to correct a twisted relationship between a longitudinal direction of the LED print head and a longitudinal direction of the photoconductive drum after the LED print head is positioned on the LED print head positioning member, and the centering section is fixed by the rotation direction determination section after the adjustment.