Laser module for bar code reader

Details Laser module for bar code reader Laser module for bar code reader

2005-01-04

2005-01-04

Lee, Diane I. (Department: 2876)

Registers

Coded record sensors

Particular sensor structure

C358S461000

Reexamination Certificate

active

06837434

ABSTRACT:
The present invention provides a laser module that can maintain weldability of a lens holder and improve machinability, and it protects a burr from being induced, and thereby improves optical accuracy, improves a reading accuracy of a bar code, improves mass productivity and reduces a manufacturing cost. In a laser module for a bar code reader, which has a packaged structure including a light emitting element and a light projection lens, for collecting a beam emitted from the light emitting element through the light projection lens and irradiating to an irradiation target, it includes: a cylindrical housing, in which the light emitting element is engaged with one end side; and a cylindrical lens holder, which is engaged with the other end side of the housing, for holding therein the light projection lens. Then, the lens holder is provided with: an inner cylinder, which is made of a metal having good machinability, for holding therein the light projection lens; and an outer cylinder engaged with a periphery of the inner cylinder and integrated with the inner cylinder, whose outer circumference is made of a metal having good weldability to be welded to the housing.

REFERENCES:
patent: 5189716 (1993-02-01), Matsubara et al.
patent: 5333224 (1994-07-01), Kikuchi
patent: 5673350 (1997-09-01), Song et al.
patent: 04097305 (1992-03-01), None
patent: 11248973 (1999-09-01), None

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