CN215416670U - Double-plate type bar code reading module with light source chip shape indication - Google Patents

Abstract

The utility model relates to a double-plate bar code reading module with light source chip shape indication, comprising: the circuit board assembly comprises a light-tight shell, a first circuit board, a second circuit board and a board-to-board connector, wherein the first circuit board, the second circuit board and the board-to-board connector are arranged in the light-tight shell; one side of the light-tight shell is provided with a camera shooting window, an illuminating light source window and an aiming light source window; an aiming lens is arranged in the aiming light source window, and a through hole is formed in the bottom of the aiming light source window; the first circuit board is provided with an aiming light source; the second circuit board is provided with a camera, an image sensor and an illumination light source. The projection projected by the aiming light source has different definition at different projection distances, and different lenses have different depth of field. Because the camera lens can be changed conveniently in the design of minute board, then through the sighting lens of changing different camera lenses cooperation different camber specifications, indicate the best and sweep the yard distance, convenience when having promoted actual operation.

Description

Double-plate type bar code reading module with light source chip shape indication

Technical Field

The utility model relates to a double-plate type bar code reading module with a light source chip shape indication, and belongs to the field of bar code reading modules.

Background

The bar code reading module is mainly composed of a PCB single board and a shell, devices such as a lens, a decoding chip, an illuminating light source and an aiming light source are welded on the PCB single board, wherein the lens is used for collecting image data, the decoding chip is used for analyzing the image data, the illuminating light source is used for light supplement under the condition of darker ambient light, and the aiming light source is used for indicating the field range of the module. Common aiming shapes include a straight shape, a cross shape, a dot shape and the like, wherein the straight shape is suitable for reading a one-dimensional code and is easy to generate superposition interference with illumination light on an image; the cross type needs the jumbo size lens, increases the module volume and the preparation technology is loaded down with trivial details, and the spot type adopts condensing lens usually, and luminance is too high, has the probability of light pollution, influences the quality of gathering the image.

Because multiple devices are arranged on the same circuit board, the problems of electrical connection, light source interference, system heat dissipation, disassembly and maintenance and the like need to be considered, so that the difficulty of the board arrangement is high, and the volume size of the bar code reading module is difficult to compress.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a double-plate type bar code reading module with light source chip shape indication, the lens can be conveniently replaced through the split-plate design of the module, the optimal code scanning distance is indicated by replacing different lenses and matching with aiming lenses with different curvature specifications, and the convenience in actual operation is improved.

The technical scheme of the utility model is as follows:

a dual plate barcode reading module having a light source chip shape indication, comprising: the circuit board assembly comprises a light-tight shell, a first circuit board, a second circuit board and a board-to-board connector, wherein the first circuit board, the second circuit board and the board-to-board connector are arranged in the light-tight shell;

a camera shooting window, an illuminating light source window and an aiming light source window are formed in one side face of the light-tight shell; an aiming lens is fixedly arranged in the aiming light source window, and a through hole is formed in the bottom of the aiming light source window;

the first circuit board is provided with an aiming light source; the aiming light source is in communication connection with the first circuit board and is flush with the through hole; the second circuit board is connected with the first circuit board through the board-to-board connector;

the second circuit board is provided with a camera, an image sensor and an illumination light source; the second circuit board is respectively in communication connection with the image sensor and the illumination light source; the camera and the image sensor are both parallel and level to the camera shooting window.

Further, an illumination lens is fixedly arranged in the illumination light source window, and the illumination light source is flush with the illumination lens;

further, the illumination lens is a fresnel lens.

Further, the aiming lens is a biconvex aspheric lens.

Further, the aiming light source adopts a green light emitting diode.

Furthermore, the wavelength range of green light emitted by the green light emitting diode is 495-530 nm.

The utility model has the following beneficial effects:

1. according to the utility model, the first circuit board and the second circuit board are arranged, so that the lens and the lighting source with larger occupied area are distributed in a board-divided manner, the wiring difficulty is reduced, the module volume is reduced, and the lens is easy to replace.

2. The utility model utilizes the pinhole imaging principle to project the shape of the LED chip of the aiming light source on the aiming lens through the through hole; by utilizing the convex lens imaging rule, the projection on the aiming lens is projected to the outside of the module to be used as aiming indication, and a part for limiting the shape of the aiming pattern is not required to be additionally arranged, so that the design of the module is simplified, and the cost is reduced.

3. The projection projected by the aiming light source has different definition at different projection distances, and different lenses have different depth of field. Because the camera lens can be changed conveniently in the design of minute board, then through the sighting lens of changing different camera lenses cooperation different camber specifications, indicate the best and sweep the yard distance, convenience when having promoted actual operation.

4. The illumination lens adopts the Fresnel lens, has light weight, small volume and low cost, and can uniformly project illumination light in a scene.

5. The aiming lens adopts a biconvex aspheric lens, and the aspheric lens has larger luminous flux and clearer and truer imaging than a spherical lens.

6. The aiming light source of the utility model adopts a green light emitting diode with the wavelength of 495-530 nm, the wavelength of the green light is shorter than that of the common red light, and the aiming light source carries more energy under the same power and is clearer and more striking.

Drawings

FIGS. 1 and 2 are exploded views of the present invention;

FIG. 3 is a schematic view of the location of the through-hole;

FIG. 4 is a schematic diagram of the positions of the aiming light source and the aiming lens;

fig. 5 is a schematic view of the aiming lens.

In the figure:

1. a light-tight housing; 101. aiming the light source window; 1011. a through hole; 102. a camera window; 103. an illumination light source window; 2. a second circuit board; 201. a lens; 202. an image sensor; 203. an illumination light source; 204. a board-to-board connector; 3. a first circuit board; 301. aiming the light source; 4. an aiming lens; 5. an illumination lens.

Detailed Description

The utility model is described in detail below with reference to the figures and the specific embodiments.

Example one

As shown in fig. 1 and 2, a dual-plate barcode reading module with a light source chip shape indication comprises: the circuit board assembly comprises a light-tight casing 1, a first circuit board 3, a second circuit board 2 and a board-to-board connector 204, wherein the first circuit board 3, the second circuit board 2 and the board-to-board connector 204 are arranged in the light-tight casing 1.

One side of the light-tight casing 1 is provided with a camera shooting window 102, an illuminating light source window 103 and an aiming light source window 101. As shown in fig. 3 to 5, an illumination lens 5 is fixedly disposed in the illumination light source window 103; the aiming lens 4 is fixedly arranged in the aiming light source window 101, and a through hole 1011 is formed in the center of the bottom of the aiming light source window 101.

The first circuit board 3 is electrically connected with a aiming light source 301, a processor and the like. Aiming light source 301 is flush with the through hole 1011.

The first circuit board 3 is connected to the second circuit board 2 through the board-to-board connector 204.

A lens 201, an image sensor 202 (the image sensor 202 is a CCD or CMOS image sensor supporting global exposure or rolling shutter exposure), and an illumination light source 203 (the illumination light source 203 is a white light emitting diode) are disposed on the second circuit board 2; the second circuit board 2 is electrically connected to the image sensor 202 and the illumination light source 203, respectively. The lens 201 and the image sensor 202 are both flush with the imaging window 102. The illumination source 203 is flush with the illumination lens 5.

The beneficial effect of this embodiment lies in:

1. through setting up first circuit board 3 and second circuit board 2, with the great camera lens 201 of area and the board overall arrangement of dividing in addition of illuminating light source 203, reduced the line degree of difficulty of walking, reduced the module volume, and be liable to change camera lens 201.

2. By using the pinhole imaging principle, the shape of the LED chip of the aiming light source 301 is projected on the aiming lens 4 through the through hole 1011; by utilizing the convex lens imaging rule, the projection on the aiming lens 4 is projected to the outside of the module to be used as aiming indication, no part for limiting the shape of the aiming pattern needs to be additionally arranged, the design of the module is simplified, and the cost is reduced.

3. The projection projected by the aiming light source has different definition at different projection distances, and different lenses 201 have different depth of field. Because the camera lens can be changed conveniently in the design of minute board, then can be through changing the sighting lens 4 of different camera lenses 201 cooperation different curvature specifications, indicate that the best sweeps the code distance (because the setting of sighting lens 4 of camera lens 201 cooperation different curvature specifications, then when sighting lens throws projected definition the highest, reach the best and sweep the code distance), convenience when having promoted actual operation.

Example two

The illumination lens 5 is a fresnel lens. The Fresnel lens is light in weight, small in size and low in cost, and can uniformly project illumination light in a scene.

The sighting lens 4 is a biconvex aspheric lens. The aspheric lens has larger luminous flux and clearer and truer imaging than the spherical lens.

The aiming light source 301 adopts a light emitting diode which emits green light with the wavelength of 495-530 nm. The green light has shorter wavelength than common red light, carries more energy under the same power, and is clearer and more striking.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (6)

1. A double plate bar code reading module with light source chip shape indication, comprising: the circuit board assembly comprises a light-tight casing (1), a first circuit board (3), a second circuit board (2) and a board-to-board connector (204), wherein the first circuit board, the second circuit board and the board-to-board connector are arranged in the light-tight casing (1);

a camera window (102), an illuminating light source window (103) and an aiming light source window (101) are formed in one side face of the light-tight shell (1); an aiming lens (4) is fixedly arranged in the aiming light source window (101), and a through hole (1011) is formed in the bottom of the aiming light source window (101);

the first circuit board (3) is provided with an aiming light source (301); the aiming light source (301) is in communication connection with the first circuit board (3), and the aiming light source (301) is flush with the through hole (1011); the first circuit board (3) is connected with the second circuit board (2) through the board-to-board connector (204);

a lens (201), an image sensor (202) and an illumination light source (203) are arranged on the second circuit board (2); the second circuit board (2) is respectively connected with the image sensor (202) and the lighting source (203) in a communication mode.

2. The dual plate barcode reading module with light source chip shape indication according to claim 1, wherein the illumination light source window (103) is fixedly provided with an illumination lens (5).

3. The dual-plate barcode reading module with light source chip shape indication according to claim 2, wherein the illumination lens (5) is a fresnel lens.

4. The bar code reading module of the dual plate type with light source chip shape indication as claimed in claim 1, wherein the aiming lens (4) is a biconvex aspheric lens.

5. The dual plate barcode reading module of claim 1, wherein the aiming light source (301) is a green led.

6. The dual-plate barcode reading module of claim 5, wherein the green LED emits green light with a wavelength range of 495-530 nm.

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