ELECTROPHOTOGRAPHIC PRINTING DEVICE

摘要

PURPOSE:To provide an electrophotographic printing device which makes the wiring density to a light emitting element coarse and has an exposure part free from variation in the focal distance between itself and lens array. CONSTITUTION:A base plate 2 having LED array 7 mounted thereon is fixed to housing frames 5 and 6. A mask member 3 is arranged opposite to the LED array 7 and a spring 8 is mounted to one end of the mask member 3 and a piezoelectric element 9 is mounted to the other end thereof. The mask member 3 is moved in the axial direction of a sensitizing drum 11 by the piezoelectric element 9. The mask member 3 is provided with light passing holes formed at the pitch two times that between the mounted light emitting elements. A SELFOC lense 4 is provided between the mask member 3 and the sensitizing drum 11.