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Movable reflector driving mechanism for bar code reader

A technology of barcode reader and driving mechanism, which is applied in the direction of instruments, electromagnetic radiation induction, computer components, etc., and can solve problems such as hindering the selection of wire diameter, limiting coil optimization, and failing to improve coil efficiency.

Inactive Publication Date: 2003-02-19
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, sharing a single coil prevents the selection of the optimum wire diameter for the respective application, thereby limiting coil optimization and failing to improve coil efficiency

Method used

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  • Movable reflector driving mechanism for bar code reader
  • Movable reflector driving mechanism for bar code reader
  • Movable reflector driving mechanism for bar code reader

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Preferred embodiments of a movable mirror driving mechanism for a bar code reader according to the present invention will now be described with reference to the accompanying drawings.

[0025] An embodiment of the movable reflector driving mechanism 31 for a barcode reader according to the present invention comprises: a casing 33; a light-emitting element 35 arranged in the casing 33; a movable reflector 37 installed in the casing 33 in a swinging manner; A magnet 39 firmly connected to the movable reflector 37 made of magnetic components; a coil 41 for swinging the movable reflector 37 by magnetic interaction with the magnet; an opening 45 through which light is emitted from the light emitting element 35 The laser beam emitted and reflected by the movable mirror travels to the outside of the housing 33, the light reflected from the barcode 43 on the scanned object returns to enter the housing 33; and a light receiving element for receiving the return light from the mova...

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PUM

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Abstract

Disclosed is a movable mirror driving mechanism for bar code reader capable of optimizing the coil as a whole as compared to a conventional single coil commonly used for driving and electromotive force detection purposes. The movable mirror driving mechanism for bar code reader is a type in which the laser beam emitted from the light emitting element is reflected by the movable mirror, the movable mirror is oscillated to make the laser beam scan across the object to be scanned and ight returned from the object to be scanned is reflected off the movable mirror to be received by the light receiving element. The movable mirror driving mechanism for bar code reader comprises the movable mirror supported to oscillated about the pivot, the magnetic member firmly attached to the movable mirror and the coil interlinking with magnetic flux of the magnetic member. The coil is a dual coil comprising the driving coil for oscillating the movable mirror and the electromotive force detection coil integrally wound with the driving coil and having a smaller wire diameter and a larger number of turns than the driving coil.

Description

[0001] This application is based on Japanese Priority Document JP2001-214902 filed in Japan Patent Office on July 16, 2001, the entire contents of which are incorporated herein by reference. technical field [0002] The present invention generally relates to a movable mirror drive mechanism for a bar code reader for scanning a bar code pattern, that is, an object to be scanned, by a laser beam emitted from a light emitting element, and more particularly It relates to improved techniques for efficiently driving coils for such movable mirrors. Background technique [0003] In recent years, goods sales management in many stores and production control of products in many factories are generally performed by optically reading digital information of barcodes attached to these goods or products. Typically, these barcodes are read by emitting a beam of light onto the barcode and scanning the barcode and then converting the intensity of the reflected beam into a corresponding electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/182G06K7/10
CPCG06K7/10653G02B7/1821
Inventor 铃木圭吾相泽秀邦
Owner SONY CORP
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