Patent ID: 6025863
Filing Date: 2000-02-15
Classification: B41J

Abstract:
An LED head which illuminates a surface of a photoconductive body, comprising:a circuit board on which LED arrays are mounted thereon in a row;a lens assembly having an optical axis and focusing light emitted from the LED arrays on the surface of the photoconductive body;a holder having a first wall with a first surface and a first reference surface opposing the first surface, the first surface supporting said lens assembly mounted thereto, the first reference surface extending in a first plane parallel to the row and the optical axis, said first wall having a first engagement portion that projects from the first wall in a first direction parallel to the optical axis, said first engagement portion having a surface that lies in the first plane; anda base housing said circuit board and said holder therein, said base having a second engagement portion and a second reference surface that lies in the first plane;wherein when said holder is assembled into said base with the first engagement portion engaging the second engagement portion, the second reference surface is brought into intimate contact with the first reference surface and the optical axis is positioned with respect to the LED arrays.