| 摘要 |
PURPOSE:To narrow the width of a head and to enhance assembling workability by fixing a substrate on which light emitting diodes are mounted to a cylindrical envelope having an elongated opening having a stepped part therein in the longitudinal direction thereof and allowing the substrate to protrude from the envelope in the light emitting region arranging direction of a light emitting diode array. CONSTITUTION:A substrate 1 is received in an envelope 6 from the wide opening 62 provided to the lower part thereof so that the light emitting region of a light emitting diode array 2 is brought into contact with the stepped part 63 of the opening 62 so as to correspond to an elongated opening and allowed to protrude from the envelope 6 in the light emitting region arranging direction of the light emitting diode array 2 in the state being in contact with the envelope 6 under pressure by a press contact plate 7. Since an optical printing head is fixed to the apparatus by this constitution so as to set an optical standard on the surface of the substrate 1, mounting becomes easy and printing becomes sharp. When a drive substrate 5 is separated from the substrate 1, both plates are laminated and a buffer material 8 composed of columnar rubber is interposed between both of them and this laminated body is brought into contact with the stepped part 63 by the press contact plate 7. Since the substrate is fixed by the envelope performing lens array fixation, the width of the optical printing head can be made narrow. |
