MODULE FOR OPTICAL INFORMATION READER

• US 20160253536A1
• Filed: 02/22/2016
• Published: 09/01/2016
• Est. Priority Date: 02/26/2015
• Status: Active Grant

• Current Assignee: Optoelectronics Co Limited (Optoelectronics)
• Original Assignee: Optoelectronics Co Limited (Optoelectronics)
• Inventors: Kubo, Wataru, Komi, Satoshi
• Granted Patent: US 10,140,490 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 26/105 with one or more pivoting mirrors or galvano-mirrors G02B26/101 takes precedence
• CPC Class Codes: G02B 27/30 Collimators
• CPC Class Codes: G02B 7/023 permitting adjustment
• CPC Class Codes: G02B 7/025 using glue
• CPC Class Codes: G02B 7/04 with mechanism for focusing or varying magnification
• CPC Class Codes: G06K 7/10831 Arrangement of optical elements, e.g. lenses, mirrors, prisms optical elements per se G02B
• CPC Class Codes: G06K 7/1098 the scanning arrangement having a modular construction

Abstract

A collimator lens unit in which an aperture limit stop formation member and a 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, and a light-emitting unit is fixed in the lens-barrel hole, with an optical axis of a light source aligned with an optical axis of the collimator lens. A long hole through which an adjust pin is penetrated so as to be reciprocatable in the optical axis direction is formed in a peripheral sidewall of the lens-barrel hole, and a fitting portion in which the adjust pin is fit is formed in an outer peripheral surface of the cylindrical member. On an inner peripheral surface of the lens-barrel hole, at a position opposed to the fitting portion, bearing portions in contact with the outer peripheral surface of the cylindrical member are formed.

Claims

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, and

wherein 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.

2. The module for the optical information reader according to claim 1, wherein the bearing portions form a V-shaped slope by two flat surfaces 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.

3. The module for the optical information reader according to claim 2, wherein an open-hole through which an adhesive for fixing the cylindrical member is fillable is formed in a middle region, of the V-shaped slope, which is not in contact with the outer peripheral surface of the cylindrical member.

4. The module for the optical information reader according to claim 1, wherein the collimator lens unit is structured such that the collimator lens and the aperture limit stop formation member are fixed to the cylindrical member.

5. The module for the optical information reader according to claim 1, wherein the collimator lens unit is structured such that the aperture limit stop formation member and the cylindrical member are integrally disposed on the collimator lens itself.

6. The module for the optical information reader according to claim 1, wherein the collimator lens unit is structured such that the collimator lens and the cylindrical member are integrally formed of the same material or different kinds of materials, and to the resultant formed body, the aperture limit stop formation member is fixed.

7. The module for the optical information reader according to claim 1, wherein the module casing is formed of resin.

8. The module for the optical information reader according to claim 7, wherein the resin is reinforced resin in which carbon is dispersed.

9. The module for the optical information reader according to claim 7, wherein a metallic foil is affixed on an outer wall surface of the module casing made of the resin, at least near a portion where the light-receiving sensor is housed.