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MODULE FOR OPTICAL INFORMATION READER

  • US 20160253536A1
  • Filed: 02/22/2016
  • Published: 09/01/2016
  • Est. Priority Date: 02/26/2015
  • Status: Active Grant
First Claim
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1. A module for an optical information reader in which a light-emitting unit having a light source, a collimator lens, a vibration mirror for scanning, a collector mirror or a condenser lens, and a light-receiving sensor are disposed in a module casing to be modularized,wherein a collimator lens unit in which an aperture limit stop formation member and the collimator lens are integrally disposed in a cylindrical member is inserted in a lens-barrel hole of the module casing so as to be reciprocatable in an optical axis direction within a predetermined range, and the light-emitting unit is fixed to the module casing in the lens-barrel hole, with an optical axis of the light source aligned with an optical axis of the collimator lens,wherein a long hole through which an adjust pin is penetrated so as to be reciprocatable in the optical axis direction within a predetermined range is formed in a peripheral sidewall of the lens-barrel hole of the module casing, and a fitting portion in which a tip portion of the adjust pin penetrating through the long hole is fit is formed in an outer peripheral surface of the cylindrical member,wherein, on an inner peripheral surface of the lens-barrel hole of the module casing, near a position opposed to the long hole and the fitting portion, a pair of bearing portions which, in a circumferential direction, are in point contact with the outer peripheral surface of the cylindrical member, and in an axial direction, are in line contact with the outer peripheral surface are formed at positions symmetrical with respect to the position in terms of an inner circumferential direction of the lens-barrel hole, andwherein an open-hole through which an adhesive for fixing the cylindrical member is fillable is formed in a middle region of the pair of bearing portions.

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