CN201514640U - Bar code scanner capable of switching scanning and reading resolution ratio - Google Patents

Abstract

A bar code scanner able to switch its scanning and reading resolutions is composed of a casing, a scanning module and a switchable amplifier module. The shell is provided with an opening. The scanning module is arranged in the shell and is provided with a light-emitting unit for irradiating illumination light to the bar code through the opening and a sensing unit for sensing a bar code image formed by reflection of the illumination light irradiating the bar code through the opening. The switchable magnifying module is provided with a magnifying lens used for magnifying the bar code image and a switching unit used for switching the position of the magnifying lens relative to the sensing unit. The switching unit can drive the magnifier to switch between an off-axis position which is not positioned between the sensing unit and the bar code and an on-axis position which is positioned between the sensing unit and the bar code.

Description

Barcode scanning device with switchable scanning and reading resolution

technical field

The utility model relates to a bar code scanner, in particular to a bar code scanner with switchable reading resolution.

Background technique

A barcode scanner uses a sensing component and a specific optical component to scan a barcode to obtain corresponding information. Generally speaking, a barcode scanner usually only has a specific optical highest resolution, and when used, it can only scan barcodes lower than this highest resolution.

Since the high resolution of the barcode has become a trend, in order to reduce the barcode volume and material cost. However, since the resolution of the optical lens of the barcode scanner is inversely proportional to the depth of field, the barcode scanner capable of scanning high-resolution (<4mil) barcodes has a relatively short optical depth of field (Depth of Focus), It means that the user needs to correctly place the barcode within a certain distance in front of the barcode scanner, within a small range before and after, in order to scan the barcode effectively. Conversely, a barcode scanner that can only scan low-resolution (>4mil) barcodes has a relatively large optical depth of field, so there is no need to consider the distance between the barcode and the barcode scanner, which can effectively improve scanning efficiency.

Therefore, in order to solve the above problems, merchants often prepare two kinds of barcode scanners with different resolutions. The low-resolution barcode scanners are used to scan general low-resolution barcodes, but when encountering high-resolution barcodes , before switching to a high-resolution barcode scanner for scanning in order to improve the overall scanning efficiency.

However, preparing two barcode scanners with different resolutions may significantly increase the cost of additional equipment purchases for merchants such as large stores that require a large number of barcode scanners, and the high-resolution barcode The cost of the scanner is much higher than that of a lower-resolution barcode scanner, which has a greater impact on operating costs for merchants.

Utility model content

The purpose of this utility model is to provide a barcode scanning device with switchable scanning and reading resolution, which can be used to scan a low-resolution barcode or a high-resolution barcode.

In order to achieve the above purpose, the utility model provides a barcode scanning device that can switch the scanning and reading resolution. The scanning scanning scanning scanning is characterized in that it includes:

a shell with an opening;

A scanning module, set in the housing, the scanning module has a light-emitting unit that irradiates an illuminating light to the barcode through the opening, and a barcode image that is formed through the opening to sense the reflection of the barcode irradiated by the illuminating light sensing unit; and

A switchable magnifying module has a magnifying glass for enlarging the barcode image, and a switching unit for switching the position of the magnifying glass relative to the sensing unit. Switching between an off-axis position between the unit and the barcode and an on-axis position between the sensing unit and the barcode.

The above-mentioned barcode scanning device with switchable scanning and reading resolution is characterized in that the magnifying glass is located in the housing.

The above-mentioned barcode scanning device with switchable scanning and reading resolution is characterized in that the switching unit includes a support part connected to the magnifying glass, and a slide formed on the housing for the support part to extend out of the housing. slot, and an operating part connected to the supporting part and located outside the housing.

The above-mentioned barcode scanning device with switchable scanning and reading resolution is characterized in that the magnifying glass is located outside the housing.

The above-mentioned barcode scanning device with switchable scanning and reading resolution is characterized in that the switching unit includes at least one pivotal part pivotally connected to the casing, and a support connected to the pivotal part and provided for the magnifying glass department.

The above-mentioned barcode scanning device with switchable scanning and reading resolution is characterized in that the casing is a handheld barcode scanner casing, a fixed barcode scanner casing or a data collector casing.

The effect of the utility model is that the switching unit drives the magnifying glass to be positioned on the axis, and can be used to scan a high-resolution barcode. Since the magnifying glass can produce a magnified image of the high-resolution barcode located in its focal point, the resolution of the high-resolution barcode is equivalently reduced to the acceptable range of the sensing unit, so that the sensing unit can be clearly seen through the magnifying glass. The magnified image is accurately sensed to read the relevant information contained on the high-resolution barcode.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

FIG. 1 is a schematic diagram of a first preferred embodiment of a barcode scanning device with switchable scanning and reading resolution of the present invention;

FIG. 2 is a schematic diagram of the operation of the barcode scanning device with switchable scanning and reading resolution in FIG. 1;

3 is a schematic diagram of the optical path of the barcode scanning device with switchable scanning and reading resolution;

FIG. 4 is a schematic diagram of a second preferred embodiment of a barcode scanning device with switchable scanning and reading resolution of the present invention; and

FIG. 5 is a schematic diagram of the operation of the barcode scanning device with switchable scanning and reading resolution in FIG. 4 .

Among them, reference signs

Housing 10 Holding part 11

Scanning part 12 Opening 13

Scanning module 20 Light emitting unit 21

Sensing unit 22 Sensing component 221

Optical lens 222 Switchable zoom module 30

Magnifying glass 31 Switching unit 32

Support part 321 chute 322

Operation part 323 Switchable amplifier module 40

Magnifying glass 41 Switching unit 42

Pivot part 421 Support part 422

High resolution barcode 100 Enlarged image 110

Detailed ways

Relevant technical content of the present utility model, detailed description, and effect, now coordinate drawing description as follows:

As shown in Figure 1, it is a first preferred embodiment of a barcode scanning device with switchable scanning and reading resolution of the present utility model, which can be used to scan a barcode (not shown), which can be a common A low resolution barcode (>4mil) or a high resolution barcode (<4mil). Moreover, the barcode is not limited to a one-dimensional barcode, and can also be a two-dimensional barcode. The barcode scanning device mainly includes a housing 10 , a scanning module 20 , and a switchable enlargement module 30 .

The casing 10 is a casing of a hand-held barcode scanner, which has a gripping portion 11 held by hand, and a scanning portion 12 extending forward from the upper edge of the gripping portion 11, the scanning portion 12 The front end has an opening 13 . It should be noted that although the housing 10 of this embodiment is an example of a hand-held barcode scanner, in actual implementation, a fixed barcode scanner housing or a data collector housing can also be used.

The scanning module 20 is arranged in the scanning part 12 of the casing 10. The scanning module 20 has a light-emitting unit 21 that irradiates an illumination light to the barcode through the opening 13, and a light emitting unit 21 that senses the illumination light irradiation through the opening 13. The sensing unit 22 of the barcode image formed by the reflection of the barcode. As shown in FIG. 3, in detail, the sensing unit 22 includes a sensing element 221 for converting an external image into an electrical signal, and at least one optical element for imaging an external image on the sensing element 221. Lens 222. The sensing element 221 can be a CMOS sensing element or a CCD sensing element.

As shown in FIG. 1 , the switchable magnifying module 30 is roughly arranged in the housing 10 , and has a magnifying glass 31 for magnifying the barcode image, and a switch for switching the magnifying glass 31 relative to the sensing unit 22. position of the switching unit 32.

The magnifying glass 31 is located in the scanning portion 12 of the casing 10 and is generally located in front of the sensing unit 22 . Specifically, the magnifying glass 31 can be a convex lens. The switching unit 32 includes a support portion 321 connected to the magnifying glass 31 , a chute 322 formed on the casing 10 for the support portion 321 to extend out of the casing 10 , and a support portion 321 connected and The operation part 323 is located outside the casing 10 . By moving the operating part 323 with a finger, the supporting part 321 can be driven to move the position of the magnifying glass 31 .

In addition, the barcode scanner of the present invention also includes a transparent sheet 50 disposed at the opening 13 , which allows light to penetrate and is used to seal the scanning module 20 and the switchable amplification module 30 in the housing 10 .

As shown in FIGS. 1 and 2 , the magnifying glass 31 is driven by the switching unit 32 so that the magnifying glass 31 can be in an off-axis position (as shown in FIG. 1 ) that is not between the sensing unit 22 and the barcode, and Switch between an on-axis position (as shown in FIG. 2 ) between the sensing unit 22 and the barcode.

As shown in FIG. 1, when the magnifying glass 31 is located at an off-axis position, the sensing unit 22 can directly sense the image of the barcode to read the relevant information on the barcode. However, the barcode is limited to low resolution rate barcode. However, since the magnifying glass 31 does not need to pass through, the barcode scanner in this state can have a longer optical depth of field, which is convenient for the user to operate and effectively improves the scanning efficiency.

In contrast, as shown in FIGS. 2 and 3 , when the magnifying glass 31 is positioned on the axis, it can be used to scan a high-resolution barcode 100 whose resolution is less than 4mil. Since the magnifying glass 31 can generate a magnified image 110 for the high-resolution barcode 100 located in its focal point F, it can equivalently reduce the resolution of the high-resolution barcode 100 to the acceptable range of the sensing unit 22, so that the sensing The unit 22 can clearly sense the magnified image 110 through the magnifying glass 31 so as to read the relevant information on the high-resolution barcode 100 .

As shown in Figure 4, it is a second preferred embodiment of a barcode scanning device with switchable scanning and reading resolution of the present invention, which is roughly the same as the first preferred embodiment, except that the switchable The type magnifying module 40 is roughly arranged outside the casing 10, and it includes a magnifying glass 41 for magnifying the barcode image, and a switching unit connected with the magnifying glass 41 and used for switching the position of the magnifying glass 41 relative to the sensing unit 22 42. The magnifying glass 41 is located outside the casing 10 . The switching unit 42 includes two pivoting parts 421 pivotally connected to the casing 40 , and a supporting part 422 connected to the pivoting parts 421 and for the magnifying glass 41 to be disposed on. It should be noted that the number of the pivot joints 421 is not limited to two, and may be one in actual implementation.

As shown in FIGS. 4 and 5 , the user can move the switching unit 42 up and down to drive the magnifying glass 41 so that the magnifying glass 41 can be in an off-axis position that is not between the sensing unit 22 and the barcode. (as in FIG. 4 ), and an on-axis position between the sensing unit 22 and the barcode (as in FIG. 5 ).

Of course, the utility model can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but These corresponding changes and deformations should all belong to the protection scope of the appended claims of the present utility model.

Claims (6)

1. A switchable barcode scanning device for scanning and reading resolution, characterized in that it comprises: a shell with an opening; A scanning module, set in the housing, the scanning module has a light-emitting unit that irradiates an illuminating light to the barcode through the opening, and a barcode image that is formed through the opening to sense the reflection of the barcode irradiated by the illuminating light sensing unit; and A switchable magnifying module has a magnifying glass for enlarging the barcode image, and a switching unit for switching the position of the magnifying glass relative to the sensing unit. Switching between an off-axis position between the unit and the barcode and an on-axis position between the sensing unit and the barcode. 2. The barcode scanning device with switchable scanning and reading resolution according to claim 1, wherein the magnifying glass is located in the housing. 3. The barcode scanning device with switchable scanning and reading resolution according to claim 2, wherein the switching unit comprises a support part connected to the magnifying glass, and a support part formed on the casing for the support part to pass through. A sliding slot extending out of the housing, and an operating part connected to the supporting part and located outside the housing. 4. The barcode scanning device with switchable scanning and reading resolution according to claim 1, wherein the magnifying glass is located outside the casing. 5. The barcode scanning device with switchable scanning and reading resolution according to claim 4, wherein the switching unit comprises at least one pivoting portion pivotally connected to the casing, and a connecting portion connected to the pivoting portion And a supporting part for the magnifying glass to be set. 6. The barcode scanning device with switchable scanning and reading resolution according to claim 1, wherein the housing is a hand-held barcode scanner housing, a fixed barcode scanner housing or a data collector housing .

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