JP2565900Y2 - Hand scanner type barcode reader - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a bar code reader .
For details, see the light emitting and receiving
With a special structure dustproof cover at the opening
The present invention relates to a bar-type reader (including a pen-scanner type) .

[0002]

2. Description of the Related Art A hand scanner type bar code reader is provided with a dustproof cover at an opening for light emission and light reception in a main body of the barcode reader, but this dustproof cover is easy to manufacture and has a low manufacturing cost. In addition, it is common to manufacture by plastic molding.

[0003]

[Problems to be Solved by the Invention] The dust cover made of plastic is more durable than the dust cover made of glass during use.
Damage due to collision with surrounding objects or dropping
Although it has the advantage of being less, plastic is remarkably easily charged.
Often used in an environment where dust easily adheres, and
For reading barcodes with several thin lines juxtaposed
Contact the dustproof cover on the barcode reader.
Misreading tends to occur due to damage and damage.
If it does, the consequences are significant. For this reason, it is necessary to frequently wipe the cover surface.However, when the dirt is wiped off, the cover surface is easily damaged, and there is a disadvantage that the light emitting and receiving effects are reduced and misreading is caused.
Use a structure that will not be damaged, and use an antistatic structure
Is difficult to satisfy at the same time, it is hard to damage
Hand-scanner type with protection type light emitting and receiving opening structure
A bar code reader was desired.

The purpose of the present invention is to provide a simple structure.
In addition, the reduction in the light transmission of the dustproof cover due to contamination due to charging
To prevent damage to the dust-proof cover
Hand scanner type bar code that can prevent misreading
To provide a leader .

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a light emitting and receiving device of a hand scanner type bar code reader.
As a dustproof cover attached to the opening, a transparent plastic plate is coated with a transparent conductive film by vapor deposition.
To adopt

[0006]

[Function] Since the conductive film surface is hardly charged,
In addition to preventing the adhesion of dust due to charging on the outer surface of the dust-proof cover, the conductive film is transparent, so there is no hindrance to the light emitting and receiving action, and the conductive film mechanically protects the surface of the dust-proof cover. And therefore high accuracy over time
Barcodes can be read and misreading is prevented.
It is.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a hand scanner type barcode of the present invention will be described.
The reader will be described in detail with reference to the illustrated embodiment.

As shown in FIG . 1, an irradiation section including a light emitting diode and a condensing cylindrical lens, an optical path refracting mirror for reading a bar code image, and an optical element are provided in a case 1 having a shape suitable for grasping . Lens and CCD
(Charge-coupled device) and the like, and a transparent plastic dust cover 3 is fitted and fixed to the light emitting / receiving opening 2 formed at the end of the case 1, and in particular, the dust cover 3 As shown in detail in FIG. 2, a transparent conductive film 4 is coated on the surface by vacuum evaporation, and the conductive film 4 may be made of gold, silver, copper, magnesium, titanium, carbon, or the like. An appropriate one such as an alloy or a compound can be adopted.

Although the illustrated embodiment is applied to a hand scanner type bar code reader , a pen scanner type
Can be applied to the bar code reader.

[0010]

[Effects of the Invention] As described above, according to the present invention,
The following effects can be obtained.

A dustproof cover 3 provided in the light emitting and receiving opening 2;
And adopt a plastic one and the surface
Since the transparent conductive film 4 was formed on the
Compared with the bar type, it may touch with surrounding objects during use.
Can prevent damage from dropping itself, and
Since there is no contamination due to electricity, the light transmission of the dustproof cover 3 is low.
The dustproof cover 3 must be wiped off frequently
And keep it clean, even though it is made of plastic.
To prevent damage from wiping the protection computing
The maintenance work for the dustproof cover 3 has been reduced.
Barcode reading with high accuracy for a long time
It is possible to read and to prevent misreading reliably.
Hand scanner type (paper
(Including scanner type)
You.

[Brief description of the drawings]

1 is a partially broken perspective view illustrating the wafer-end scanner bar code reader of the present devised.

FIG. 2 is a sectional view of a dust cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Emitter / light-receiving opening 3 Dustproof cover 4 Transparent conductive film

Claims (1)

(57) [Scope of request for utility model registration] An irradiation unit and a reading unit are provided in a case (1).
In addition, the opening for light emitting and receiving
(2) was opened, and the light emitting and receiving opening (2) was used for evaporation.
Transparent plastic with more transparent conductive film (4) coated on the surface
It is characterized by fixing a dustproof cover (3) made of a
Hand scanner type barcode reader.