Double-lens code scanning head and industrial code scanner

Abstract

The utility model discloses a dual-lens code scanning head and an industrial code scanner, and relates to the technical field of scanning devices.The dual-lens code scanning head comprises a main body structure, a first fixed focal length lens module, a second fixed focal length lens module, a laser module, a first light supplementing module and a second light supplementing module; the first fixed focal length lens module is mounted on the main body structure and is a telephoto lens module; the second fixed focal length lens module is installed on the main body structure and is a short focal length lens module. The combined design of the long focus and the short focus can provide an ultra-large decoding depth of field and is better in applicability, an AA process is not needed, the cost is reduced, and compared with the design of a zoom lens module, the combined design of the two fixed-focal-length lens modules can realize no processing unit or switching unit. In addition, the light supplementing module and the laser module are independently arranged, the cost is low, and assembling and positioning are fast.

Description

Technical Field

[0001] The present application relates to the technical field of scanning devices, and in particular to a dual-lens scanner and an industrial barcode scanner. Background Art

[0002] Scanning code is a QR code and barcode recognition function that can identify QR code and barcode information published according to prescribed coding rules. It is widely used in life and industry.

[0003] The traditional barcode scanning module is a single-lens module, which limits the user's barcode scanning application scenarios. To solve this problem, the prior art proposes a dual-lens barcode scanning module, but in order to save space, the general lens module assembly will choose the AA process, and the fill light lens and the laser lens are an integrated design. However, the AA process and the integrated lens are both relatively expensive, and the AA process has low process efficiency, which also leads to the relatively high cost of the dual-lens barcode scanning module. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a dual-lens barcode scanner and an industrial barcode scanner to solve the technical problem of high cost of existing dual-lens barcode scanner modules.

[0005] In order to achieve the above technical objectives, the present application provides a dual-lens scanner, including a main structure, a first fixed focal length lens module, a second fixed focal length lens module, a laser module, a first fill light module and a second fill light module;

[0006] The first fixed focal length lens module is installed on the main structure and is a telephoto lens module;

[0007] The second fixed focal length lens module is installed on the main structure and is a short focal length lens module;

[0008] The first fill light module is installed on the main structure, and is used to provide fill light for the code scanned by the first fixed focal length lens module;

[0009] The second fill light module is installed on the main structure, and is used to provide fill light for the code scanned by the second fixed focal length lens module;

[0010] The laser module is mounted on the main structure and is located between the first fixed-focus lens module and the second fixed-focus lens module, and is used for aligning with the central area of ​​the lens field of view.

[0011] Furthermore, the main structure includes a bracket and a circuit board;

[0012] The circuit board is mounted on the bracket;

[0013] The bracket is provided with a first code scanning channel avoiding the first fixed-focus lens module, a second code scanning channel avoiding the second fixed-focus lens module, a first fill light channel avoiding the first fill light module, a second fill light channel avoiding the second fill light module and a laser channel avoiding the laser module.

[0014] Furthermore, the first fixed focal length lens module includes a first lens mount, a telephoto lens and a first photosensitive element;

[0015] The first photosensitive element is mounted on the circuit board;

[0016] The first lens mount is mounted on the circuit board and forms a sealing cover for the first photosensitive element;

[0017] The telephoto lens is mounted on the first lens mount.

[0018] Furthermore, the second fixed focal length lens module includes a second lens holder, a short focal length lens and a second photosensitive element;

[0019] The second photosensitive element is mounted on the circuit board;

[0020] The second lens mount is mounted on the circuit board and forms a sealing cover for the second photosensitive element;

[0021] The short-focus lens is mounted on the second lens mount.

[0022] Furthermore, the first fill light module includes a first fill light and a first fill light lens;

[0023] The first fill light is installed on the circuit board;

[0024] The first fill-in light lens is mounted on the bracket, and is located between the first fixed-focus lens module and the second fixed-focus lens module, and is disposed close to the first fixed-focus lens module.

[0025] Furthermore, the second fill light module includes a second fill light and a second fill light lens;

[0026] The second fill light is installed on the circuit board;

[0027] The second fill-in light lens is mounted on the bracket, and is located between the first fixed-focus lens module and the second fixed-focus lens module, and is disposed close to the second fixed-focus lens module.

[0028] Furthermore, the laser module includes a laser and a laser lens;

[0029] The laser is mounted on the circuit board;

[0030] The laser lens is mounted on the bracket.

[0031] Furthermore, the first fill-light lens and the second fill-light lens are integrally connected to form an integrated lens.

[0032] Furthermore, the laser module is placed directly behind the integrated lens;

[0033] The integrated lens is provided with a laser avoidance hole for avoiding the laser module.

[0034] The present application also discloses an industrial barcode scanner, including a scanner body and the dual-lens scanner terminal;

[0035] The dual-lens scanner terminal is installed on the scanner body.

[0036] It can be seen from the above technical solutions that the dual-lens scanner designed in this application has the following beneficial effects:

[0037] 1. Two different depths of field are obtained through two lens modules with different focal lengths. The telephoto lens module is used to identify distant barcodes, while the short-focus lens module is used to identify nearby barcodes. This combination design can provide an ultra-large decoding depth of field and better applicability.

[0038] 2. Both lens modules are fixed focal length (FF-Fixed Focus) lens modules. Compared with the zoom lens module design, there is no need to use the AA process, which helps to reduce costs. Moreover, the combination design of two fixed focal length lens modules, compared with the zoom lens module design, can achieve no processing unit or switching unit, further reducing costs while improving product reliability.

[0039] 3. The fill light module and laser module are set independently, with low cost and quick assembly and positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0041] Figure 1 A top view of a dual-lens scanning terminal provided in this application;

[0042] Figure 2 This is a main view of a dual-lens scanner provided in this application;

[0043] Figure 3 A first cross-sectional view of a dual-lens scanning terminal provided in the present application;

[0044] Figure 4 A second cross-sectional view of a dual-lens scanning terminal provided in the present application;

[0045] Figure 5 A schematic diagram of the structure of a dual-lens scanning terminal with auxiliary lines of field of view angle provided in this application;

[0046] Figure 6 This is an overall explosion diagram of a dual-lens scanning dock provided in this application;

[0047] Figure 7 A schematic diagram of a first partial explosion of a dual-lens dock sweeper provided in this application;

[0048] Figure 8 A schematic diagram of a second partial explosion of a dual-lens scanning dock provided in this application;

[0049] Fig. 9 A stereoscopic diagram of an integrated lens of a dual-lens scanning terminal provided in the present application;

[0050] Fig.10 A schematic diagram of the installation structure of a first fill-in light lens of a dual-lens scanning terminal provided in this application;

[0051] Fig.11 A schematic diagram of the installation structure of a second fill-in light lens of a dual-lens scanning terminal provided in this application;

[0052] Fig.12 This is a schematic diagram of the installation structure of a laser lens for a dual-lens scanning terminal provided in this application;

[0053] Fig.13 This is an optical schematic diagram of a second fixed focal length lens module of a laser lens of a dual-lens scanning terminal provided in this application;

[0054] Fig.14 An optical schematic diagram of a first fixed focal length lens module of a dual-lens scanning laser lens provided in the application;

[0055] In the figure: 100, first fixed focal length lens module; 200, second fixed focal length lens module; 300, main structure; 301, bracket; 302, circuit board; 400, first fill light module; 500, second fill light module; 600, laser module;

[0056] 11. First photosensitive element; 12. First lens mount; 13. Telephoto lens; 21. Second photosensitive element; 22. Second lens mount; 23. Short-focus lens; 31. First fill light; 32. First fill light lens; 41. Second fill light; 42. Second fill light lens; 50. Laser avoidance hole; 51. Laser; 52. Laser lens; 61. Board unit; 62. Connecting cable. DETAILED DESCRIPTION

[0057] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection of the embodiments of the present application.

[0058] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0059] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a replaceable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0060] The embodiment of the present application discloses a dual-lens scanner.

[0061] See also Figures 1 to 4 An embodiment of a dual-lens scanning terminal provided in the embodiments of the present application includes:

[0062] The main structure 300 , the first fixed focal length lens module 100 , the second fixed focal length lens module 200 , the laser module 600 , the first fill light module 400 and the second fill light module 500 .

[0063] The first fixed focal length lens module 100 is installed on the main structure 300 and is a telephoto lens 13 module. The second fixed focal length lens module 200 is installed on the main structure 300 and is a short focal length lens 23 module. Two different depths of field are obtained by two lens modules with different focal lengths. The telephoto lens 13 module is used to identify distant barcodes, while the short focal length lens 23 module is used to identify nearby barcodes. This combination design can provide an ultra-large decoding depth of field and has better applicability. Moreover, both lens modules are fixed focal length FF-Fixed Focus lens modules. Compared with the zoom lens module design, there is no need to use the AA process, which helps to reduce costs. Moreover, the combination design of the two fixed focal length lens modules can achieve no processing unit or switching unit compared to the zoom lens module design, further reducing costs while improving product reliability. In the present application, the reading distance of the telephoto lens 13 module can be designed to be 30 cm to 1000 cm, and the reading distance of the short-focus lens 23 module can be designed to be within 30 cm. Those skilled in the art can flexibly change the design according to actual needs without limitation.

[0064] The first fill light module 400 is installed on the main structure 300, and is used to fill light for the scanned code of the first fixed focal length lens module 100. The second fill light module 500 is installed on the main structure 300, and is used to fill light for the scanned code of the second fixed focal length lens module 200. The laser module 600 is installed on the main structure 300 and is located between the first fixed focal length lens module 100 and the second fixed focal length lens module 200, and is used to align the center area of ​​the lens field of view. The fill light module and the laser module 600 are independently set, which is low in cost and quick in assembly and positioning.

[0065] The above is an embodiment of a dual-lens scanning terminal provided in the embodiment of the present application. The following is an embodiment of a dual-lens scanning terminal provided in the embodiment of the present application. For details, please refer to Figures 1 to 14 .

[0066] Based on the solution of the above embodiment 1:

[0067] Furthermore, the main structure 300 includes a bracket 301 and a circuit board 302, and the circuit board 302 is mounted on the bracket 301. The circuit board 302 can be pre-fixed to the bracket 301 by buckles, and then reinforced by dispensing glue.

[0068] The bracket 301 is provided with a first code scanning channel for avoiding the first fixed-focus lens module 100 to ensure that the first fixed-focus lens module 100 can normally recognize the barcode; a second code scanning channel for avoiding the second fixed-focus lens module 200 is also provided to ensure the second fixed-focus lens module 200; a first fill light channel for avoiding the first fill light module 400 is also provided to ensure that the first fill light module 400 can function normally as a fill light; a second fill light channel for avoiding the second fill light module 500 is also provided to ensure that the second fill light module 500 can function normally as a fill light; a laser channel for avoiding the laser module 600 is also provided to ensure that the laser module 600 can function normally.

[0069] The structural design of the bracket 301 can be adaptively changed according to its own installation and fixing requirements and the coordination requirements of the first fixed focal length lens module 100, the second fixed focal length lens module 200, the laser module 600, the first fill light module 400 and the second fill light module 500 without limitation.

[0070] Furthermore, if Figure 6 as well as Figure 7 As shown, the first fixed focal length lens module 100 is designed to include a first lens holder 12 , a telephoto lens 13 and a first photosensitive element 11 .

[0071] The first photosensitive element 11 is mounted on the circuit board 302 .

[0072] The first lens mount 12 is installed on the circuit board 302 and forms a sealing cover for the first photosensitive element 11. The first lens mount 12 can be positioned and installed on the circuit board 302 through the positioning cooperation between the positioning column and the positioning hole, and then fixedly connected to the circuit board 302 by glue.

[0073] The telephoto lens 13 is mounted on the first lens mount 12 , and the telephoto lens 13 can be detachably connected to the first lens mount 12 by means of threaded connection.

[0074] Furthermore, if Figure 6 as well as Figure 7 As shown, the design of the second fixed focal length lens module 200 includes a second lens holder 22 , a short focal length lens 23 and a second photosensitive element 21 .

[0075] The second photosensitive element 21 is mounted on the circuit board 302 .

[0076] The second lens mount 22 is installed on the circuit board 302 and forms a sealing cover for the second photosensitive element 21. The second lens mount 22 can be positioned and installed on the circuit board 302 through the positioning cooperation between the positioning column and the positioning hole, and then fixedly connected to the circuit board 302 by glue.

[0077] The short-focus lens 23 is mounted on the second lens mount 22 , and the short-focus lens 23 can be detachably connected to the second lens mount 22 by means of a threaded connection.

[0078] The lenses in the lens module in the present application are all fixed by a lens mount, which can further save process costs and improve process efficiency.

[0079] Furthermore, if Figure 6 , Figure 8 as well as Fig.10 As shown, the first fill light module 400 includes a first fill light 31 and a first fill light lens 32 , and the first fill light lens 32 is a conical telephoto fill light lens.

[0080] The first fill light 31 is mounted on the circuit board 302 .

[0081] The first fill-in light lens 32 is mounted on the bracket 301 and is located between the first fixed-focus lens module 100 and the second fixed-focus lens module 200 and is disposed close to the first fixed-focus lens module 100. Specifically, Fig.10 As shown, a first concave cavity connected to the first fill light channel and adapted to the shape of the first fill light lens 32 can be opened on the bracket 301. The first fill light lens 32 quickly self-positions through the center of its own shape and is then fixed by dispensing glue.

[0082] Furthermore, if Figure 6 , Figure 8 as well as Fig.11 As shown, the second fill light module 500 includes a second fill light lamp 41 and a second fill light lens 42 . The second fill light lens 42 is a conical short-focus fill light lens.

[0083] The second fill light 41 is mounted on the circuit board 302 .

[0084] The second fill-in light lens 42 is mounted on the bracket 301 and is located between the first fixed-focus lens module 100 and the second fixed-focus lens module 200 and is disposed close to the second fixed-focus lens module 200. Specifically, Fig.11 As shown, a second cavity connected to the second fill light channel and adapted to the shape of the second fill light lens 42 can be opened on the bracket 301, and the second fill light lens 42 can quickly self-position through the center of its own shape and then be fixed by glue.

[0085] Furthermore, if Figure 6 as well as Fig.12 As shown, the laser module 600 includes a laser 51 and a laser lens 52 , and the laser lens 52 is a cylindrical laser collimating lens.

[0086] The laser 51 is mounted on the circuit board 302 . The laser 51 may be a laser diode and is fixed on the circuit board 302 by soldering.

[0087] The laser lens 52 is mounted on the bracket 301. Specifically, Fig.12 As shown, a third cavity connected to the laser channel and adapted to the shape of the laser lens 52 can be provided on the bracket 301 to position and install the laser lens 52, and then fixed by glue.

[0088] Furthermore, the first fill-in light lens 32 and the second fill-in light lens 42 in the present application can be independently arranged, or they can be integrally connected to form an integrated lens. The integral integrated design is more convenient to install, and the overall structure is more compact, which reduces the overall structure in the following aspects: Figure 2 Dimensions in the W direction are shown.

[0089] Furthermore, if Figure 3 , Figure 4 as well as Fig. 9 As shown in FIG. 1 , the laser module 600 can be placed directly behind the integrated lens, that is, the laser module 600 is placed in the rear. Correspondingly, a laser avoidance hole 50 is provided on the integrated lens to avoid the laser module 600. This design can prevent the laser module 600 from stacking and scanning at the terminal. Figure 2 The influence of the H direction shown in the figure reduces the overall structure in the Figure 2 The dimensions in the H direction shown are more compact as a whole. Of course, it is also possible not to provide the laser avoidance hole 50, and the laser module 600 can be arranged above or below the integrated lens.

[0090] Furthermore, since the first fill light 31, the second fill light 41, the first photosensitive element 11, the second photosensitive element 21 and the laser 51 are installed on the circuit board 302 in a front-to-back distribution, in order to facilitate their respective installation, the circuit board 302 of the present application is designed to include the following: Figure 7 as well as Figure 8 The multiple board units 61 shown are arranged in sequence at intervals, and the adjacent board units 61 are electrically connected through connecting cables 62 such as FPC cables, so as to meet the installation requirements of components in different positions.

[0091] like Fig.13 as well as Fig.14 As shown, in this application, in order to achieve miniaturization of the overall structure:

[0092] The target surface sizes of the first photosensitive element 11 and the second photosensitive element 21 are preferably designed to be 1 / 4"≤S≤1 / 2", and the aperture number is preferably designed to be in the range of 2.8≤F≤16.

[0093] Regarding the selection of focal lengths of the telephoto lens 13 and the short-focus lens 23:

[0094] According to the design requirements, the required decoding distance from near to far is A--->B, and the two focal length values ​​can be obtained by solving formula (1-8):

[0095] L1-Δ'1≤A, L2+Δ”2≥B (1-2)

[0096] Δ1+Δ2≥BA, L1+Δ”1≥L2-Δ'2 (3-4)

[0097]

[0098]

[0099] Among them, Δ1, Δ'1, Δ"1 represent the depth of field, front depth of field and back depth of field of the short-focus lens 23. Similarly, Δ2, Δ'2, Δ"2 represent the depth of field, front depth of field and back depth of field of the telephoto lens 13. L represents the object distance, σ is the allowable confusion circle size of the imaging system, f1 is the focal length value of the short-focus lens 23, and f2 is the focal length value of the telephoto lens 13.

[0100] Due to the differences in the frames and fields of view of the two lens groups, lighting solutions need to be configured separately around the two lens modules, with the key indicators being the lighting angle and light intensity.

[0101] like Figure 5 As shown, the short-focus lens 23 is used with near-field lighting. The short-focus lens 23 has a wide field of view and a correspondingly large near-field lighting angle. The long-focus lens 13 is used with far-field lighting. The corresponding lighting angle is small, but the light energy is concentrated and can illuminate farther.

[0102] In the scheme, the field of view of the short-focus lens 23 is α1×α2, the field of view of the long-focus lens 13 is β1×β2, the near-field illumination angle of the second fill light module 500 is θ1, and the far-field illumination angle of the first fill light module 400 is θ2. The imaging angle satisfies the following relationship:

[0103] α1≥2β1, α1×α2≥4(β1×β2)

[0104] The lighting distribution angle and imaging satisfy the following relationship:

[0105] 2α1>θ1>1.5α1, 2α2>θ2>1.5α2.

[0106] The working process of the terminal sweeping in this application can be as follows:

[0107] Step 1: The control unit on the circuit board 302 controls the first fixed focal length lens module 100 to obtain a first barcode image, and then the first fixed focal length lens module 100 transmits the obtained first barcode image to the decoding unit on the circuit board 302;

[0108] Step 2: The control unit on the circuit board 302 controls the second fixed-focus lens module 200 to obtain a second barcode image, and then the second fixed-focus lens module 200 transmits the obtained second barcode image to the decoding unit on the circuit board 302;

[0109] Step 3: The decoding unit decodes the first barcode image and the second barcode image, and determines whether the decoding is successful;

[0110] If successful, close the sweep dock;

[0111] If it fails, return to step 1 above.

[0112] The present application also discloses an industrial barcode scanner, including a scanner body and the dual-lens scanner terminal of the above-mentioned embodiment 1 or embodiment 2, wherein the dual-lens scanner terminal is installed on the barcode scanner body.

[0113] The above is a detailed introduction to a dual-lens barcode scanner and industrial barcode scanner provided by the present application. For a person skilled in the art, according to the idea of ​​the embodiments of the present application, there may be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A dual-lens scanner, characterized in that: It comprises a main structure (300), a first fixed focal length lens module (100), a second fixed focal length lens module (200), a laser module (600), a first fill light module (400) and a second fill light module (500); The first fixed focal length lens module (100) is mounted on the main structure (300) and is a telephoto lens (13) module; The second fixed focal length lens module (200) is mounted on the main structure (300) and is a short focal length lens (23) module; The first fill light module (400) is mounted on the main structure (300) and is used to provide fill light for scanning codes of the first fixed focal length lens module (100); The second fill light module (500) is mounted on the main structure (300) and is used to provide fill light for scanning codes of the second fixed focal length lens module (200); The laser module (600) is mounted on the main structure (300) and is located between the first fixed-focus lens module (100) and the second fixed-focus lens module (200) and is used to align with the central area of ​​the lens field of view.

2. The dual-lens scanner according to claim 1, characterized in that: The main structure (300) comprises a bracket (301) and a circuit board (302); The circuit board (302) is mounted on the bracket (301); The bracket (301) is provided with a first code scanning channel that avoids the first fixed-focus lens module (100), a second code scanning channel that avoids the second fixed-focus lens module (200), a first fill-light channel that avoids the first fill-light module (400), a second fill-light channel that avoids the second fill-light module (500), and a laser channel that avoids the laser module (600).

3. The dual-lens scanner according to claim 2, characterized in that: The first fixed focal length lens module (100) comprises a first lens mount (12), a telephoto lens (13) and a first photosensitive element (11); The first photosensitive element (11) is mounted on the circuit board (302); The first lens mount (12) is mounted on the circuit board (302) and forms a sealed cover for the first photosensitive element (11); The telephoto lens (13) is mounted on the first lens mount (12).

4. The dual-lens scanner according to claim 3, characterized in that: The second fixed focal length lens module (200) comprises a second lens holder (22), a short focal length lens (23) and a second photosensitive element (21); The second photosensitive element (21) is mounted on the circuit board (302); The second lens mount (22) is mounted on the circuit board (302) and forms a sealed cover for the second photosensitive element (21); The short-focus lens (23) is mounted on the second lens mount (22).

5. The dual-lens scanner according to claim 2, characterized in that: The first fill light module (400) comprises a first fill light lamp (31) and a first fill light lens (32); The first fill light (31) is mounted on the circuit board (302); The first fill-in light lens (32) is mounted on the bracket (301), and is located between the first fixed-focus lens module (100) and the second fixed-focus lens module (200), and is arranged close to the first fixed-focus lens module (100).

6. The dual-lens scanner according to claim 5, characterized in that: The second fill light module (500) comprises a second fill light lamp (41) and a second fill light lens (42); The second fill light (41) is mounted on the circuit board (302); The second fill-in light lens (42) is mounted on the bracket (301), and is located between the first fixed-focus lens module (100) and the second fixed-focus lens module (200), and is arranged close to the second fixed-focus lens module (200).

7. The dual-lens scanner according to claim 6, characterized in that: The laser module (600) comprises a laser (51) and a laser lens (52); The laser (51) is mounted on the circuit board (302); The laser lens (52) is mounted on the bracket (301).

8. The dual-lens scanner according to claim 6, characterized in that: The first fill-in light lens (32) and the second fill-in light lens (42) are integrally connected to form an integrated lens.

9. The dual-lens scanner according to claim 8, characterized in that: The laser module (600) is placed directly behind the integrated lens; The integrated lens is provided with a laser avoidance hole (50) for avoiding the laser module (600).

10. Industrial barcode scanner, characterized in that: It comprises a scanner body and a dual-lens scanner terminal as claimed in any one of claims 1 to 9; The dual-lens scanner terminal is installed on the scanner body.

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