Patent ID: 7206109
Filing Date: 2007-04-17
Classification: G02B,G06K

Abstract:
1. A module for an optical information reader in which at least a light emitting unit with a laser diode as a light source, a collimator lens, a vibration mirror for scanning, a condensing mirror or a condensing lens, and a light receiving unit are installed in a module casing for modularization, wherein said module casing is provided with a lens-barrel hole having an opening at one end face thereof and an aperture formed at a tip face thereof and having a press-fit part, provided between the opening and the tip face, into which said light emitting unit is to be press-fitted, said collimator lens is adhered to a tip bottom part of said lens-barrel hole, and said light emitting unit is press-fitted into said press-fit part in order to position a light emitting point of the laser diode slightly farther than a focus point of the collimator lens, wherein said lens-barrel hole has said press-fit part of which an inner peripheral face is a cylindrical face with an inner diameter slightly smaller than an outer diameter of said light emitting unit that is to be press-fitted thereinto, and has a tapered press-fit guide part that is formed near the opening and has an inner peripheral face gradually increasing in inner diameter toward the opening.