Double-lens mounting seat and code scanning mechanism thereof

Abstract

The utility model provides a double-lens mounting seat and a code scanning mechanism thereof, one side of a mounting shell is provided with a mounting groove, two symmetrically distributed lens holes are arranged in the mounting groove, lens grooves are respectively arranged in the lens holes, the lens grooves are D-shaped, and straight edges of the D-shaped lens grooves are oppositely arranged to form a partition plate; filter disc grooves are formed in the mounting grooves on the sides of the lens holes, and shading grooves are formed in the inner walls of the mounting grooves among the lens holes. According to the invention, the installation of the wide-field-of-view and narrow-field-of-view identification lenses can be realized, the rapid assembly of the double lenses is realized, the installation precision is high, one image sensor can be shared, the overall structure is relatively small and compact, and the light-weight use requirement can be met. The double-lens structure greatly enlarges the code scanning range, can clearly recognize and scan codes in a wide object distance range, improves the scanning efficiency, and improves the user experience.

Description

Technical Field

[0001] This utility model belongs to the field of barcode scanning lens technology, and in particular relates to a dual-lens mounting base and its barcode scanning mechanism. Background Technology

[0002] With the development of technology, our lives are becoming increasingly intelligent. Products can be distinguished by machines by attaching different barcodes, and online social networking can be easily achieved by scanning QR codes. To meet different usage needs, a large number of different types and sizes of codes are needed for differentiation, which has also promoted the development of barcode scanning devices. The working principle of a barcode scanning device is to collect images through a front-end scanning lens, and then process and recognize them through built-in image algorithms to read information.

[0003] Because there are many types of barcodes, and the features they represent vary in size, scanning lenses need high resolution to capture images when recognizing smaller barcodes. Limited by the limiting angle of resolution, different focal lengths of scanning lenses will have different minimum barcode sizes they can recognize. Furthermore, limited by the depth of focus, different specifications of scanning lenses typically have a small working distance for barcode recognition. Currently, most barcode scanning devices on the market use lenses with different working distances for different barcode sizes. However, for small barcodes, the working distance range is usually quite small, requiring users to constantly move their phones or other scanning devices to complete the scan. Existing single-lens mounts cannot accommodate the installation requirements of dual-lens scanning lenses. Utility Model Content

[0004] This invention provides a dual-lens mounting base and its barcode scanning mechanism, which can effectively solve the above-mentioned problems.

[0005] This utility model is implemented as follows:

[0006] A dual-lens mounting base includes a mounting shell. One side of the mounting shell has a mounting groove with two symmetrically distributed lens holes. Each lens hole has a lens groove, which is D-shaped. The straight edges of the D-shaped lens grooves are arranged opposite each other to form a partition. The mounting groove on the lens hole side has a filter groove, and the inner wall of the mounting groove between the lens holes has a light-shielding groove.

[0007] As a further improvement, the arc surface of the "D"-shaped lens groove is an arc shape, and the center of the two lenses is equidistant from the light-shielding groove.

[0008] As a further improvement, the filter plate groove is provided with glue dispensing grooves at the four corners.

[0009] As a further improvement, the thickness of the partition is 0.5-1 mm.

[0010] As a further improvement, the thickness of the partition is 0.8 mm.

[0011] A dual-lens scanning mechanism is provided in which lenses with different focal lengths are provided in the two lens slots of the mounting shell of the mounting base, a filter is provided in the filter slot, and a light-shielding plate is provided in the light-shielding slot.

[0012] As a further improvement, the field of view of the lens is different.

[0013] As a further improvement, an image sensor is provided on the image side of the mounting housing, and the center of the image sensor coincides with the center of the light-shielding plate.

[0014] As a further improvement, the maximum outer diameter of the lens is less than 2.5 mm, and the thickness of the mounting shell is less than 5.6 mm.

[0015] As a further improvement, the lens consists of a dual-lens system consisting of lens A and lens B;

[0016] Lens A, along its optical axis from object side to image side, consists of lens one, aperture one, lens two, and protective plate one. Lens one has a focal length of -18.63 to -18.53 mm, a refractive index of 1.5 to 1.7, an Abbe number of 23.0 to 24.0, an object-side radius of curvature of 1.88 to 1.98, and a thickness interval of 0.95 to 1.05 mm; the image-side radius of curvature is 1.28 to 1.38, and the thickness interval is 0 to 0.1 mm. Aperture one has a thickness interval of 0 to 0.09 mm. Lens two has a focal length of 2.77 to 2... The first protective sheet has a refractive index of 1.87 mm, a refractive index of 1.4–1.6, an Abbe number of 55.2–56.2, a radius of curvature of -1.78–1.68 on the object side, a thickness interval of 0.95–1.05 mm, a radius of curvature of -1.03–0.92 on the image side, and a thickness interval of 2.48–2.58 mm; the second protective sheet has a refractive index of 1.0–2.0, an Abbe number of 63.7–64.7, a thickness interval of 0.65–0.75 mm on the object side, and a thickness interval of 1.01–1.11 mm on the image side.

[0017] Lens B, along its optical axis from object side to image side, consists of lens three, aperture two, lens four, and protective plate two. Lens three has a focal length of 3.32–3.42 mm, a refractive index of 1.4–1.6, an Abbe number of 55.2–56.2, an object-side radius of curvature of 0.99–1.09, and a thickness interval of 0.95–1.05 mm; the image-side radius of curvature is 1.56–1.67, and the thickness interval is 0–0.1 mm. Aperture two has a thickness interval of 0.09–0.15 mm. Lens four has a focal length of -6.57–-6.47 mm, a refractive index of 1.5–1.7, and an Abbe number of 23.0–24.0. The object-side radius of curvature L… 41The first protective film has a refractive index of -1.30 to -1.20 and a thickness interval of 0.95 to 1.05 mm. The image side has a radius of curvature of -2.38 to -2.28 and a thickness interval of 0.94 to 1.04 mm. The second protective film has a refractive index of 1.0 to 2.0 and an Abbe number of 63.7 to 64.7. The object side has a thickness interval of 0.65 to 0.75 mm and the image side has a thickness interval of 2.95 to 3.05 mm.

[0018] The beneficial effects of this utility model are: it enables the installation of both wide-field and narrow-field recognition lenses, achieves rapid assembly of dual lenses with high installation accuracy, and allows for the sharing of a single image sensor. Furthermore, the overall structure is relatively small and compact, meeting lightweight requirements. The dual-lens structure significantly increases the scanning range, enabling clear barcode recognition over a wider object distance, improving scanning efficiency and enhancing the user experience. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of a dual-lens mounting base according to this utility model;

[0021] Figure 2 This is another structural schematic diagram provided by an embodiment of a dual-lens mounting base of this utility model;

[0022] Figure 3 This is a structural schematic diagram of an embodiment of a dual-lens scanning mechanism of this utility model;

[0023] Figure 4 This is another structural schematic diagram provided by an embodiment of a dual-lens scanning mechanism of this utility model;

[0024] Figure 5 This is a rear view provided by an embodiment of a dual-lens scanning mechanism of this utility model;

[0025] Figure 6 This is a cross-sectional view provided by an embodiment of a dual-lens scanning mechanism of this utility model;

[0026] Figure 7 This is a schematic diagram of the internal lens provided in an embodiment of a dual-lens scanning mechanism of this utility model;

[0027] Figure 8This is an installation diagram provided by an embodiment of a dual-lens scanning mechanism of this utility model;

[0028] Figure 9 This is another installation diagram provided by an embodiment of a dual-lens scanning mechanism of this utility model.

[0029] Reference numerals:

[0030] Mounting housing 1; Mounting slot 11; Lens hole 12; Lens slot 13; Partition 14; Filter slot 15; Light shielding slot 16; Glue dispensing slot 17; Filter 2; Light shielding plate 3; Image sensor 4; Lens 1 51; Aperture 1 52; Lens 2 53; Protective plate 1 54; Lens 3 61; Aperture 2 62; Lens 4 63; Protective plate 2 64. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0032] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In the description of this utility model, the terms "upper", "middle", "side", "side", "upper side", "end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Reference Figure 1-3As shown, a dual-lens mount includes a mounting shell 1. A mounting groove 11 is provided on one side of the mounting shell 1. Two symmetrically distributed lens holes 12 are provided within the mounting groove 11. Lens slots 13 are respectively provided within the lens holes 12. The lens slots 13 are D-shaped, and their straight edges are arranged opposite each other to form a partition 14. A filter slot 15 is provided within the mounting groove 11 on the side of the lens holes 12. A light-shielding groove 16 is provided on the inner wall of the mounting groove 11 between the lens holes 12.

[0035] This mounting bracket enables the installation of dual lenses, features fast installation speed, a compact and robust structure, small size, light weight, and high installation precision.

[0036] Furthermore, the arc surface of the "D"-shaped lens groove 13 is circular arc-shaped, and the center of the two lenses is equidistant from the light-shielding groove 16.

[0037] The “D”-shaped lens groove 13 reduces the center distance between the two lenses, allowing the two lenses to share a single image sensor.

[0038] Furthermore, the filter plate groove 15 is provided with glue dispensing grooves 17 at its four corners.

[0039] The filter plate slot 15 is used to install the filter plate and is stably fixed at the four corners without affecting the setting of other structures.

[0040] Furthermore, the thickness of the partition 14 is 0.5-1mm.

[0041] Furthermore, the thickness of the partition 14 is 0.8 mm.

[0042] Because the lens barrel is made of PC plastic, to ensure uniform thickness and prevent shrinkage and deformation during molding, the thickness of the intermediate partition 14 should ideally be set between 0.5-1mm, with approximately 0.8mm being the most favorable.

[0043] Reference Figure 3-9 As shown, a dual-lens scanning mechanism is provided in which lenses with different focal lengths are provided in the two lens slots 13 of the mounting shell 1 of the mounting base, a filter 2 is provided in the filter slot 15, and a light-blocking plate 3 is provided in the light-blocking slot 16.

[0044] By installing two lenses with different focal lengths, images from different object distances are received by the same image sensor 4, resulting in a wider scanning range and clear identification of codes.

[0045] The purpose of the light-blocking plate 3 is to prevent the intersection area of ​​the two optical systems from being simultaneously received by the image sensor 4, causing interference in the image. The light-blocking plate 3 is used to block the intersection area of ​​the two lenses.

[0046] Furthermore, the field of view of the lenses is different.

[0047] This results in a wider field of view.

[0048] Furthermore, an image sensor 4 is provided on the image side of the mounting housing 1, and the center of the image sensor 4 coincides with the center of the light-shielding plate 3.

[0049] The optical systems of lens A and lens B are equipped with the same image sensor 4. The central optical axis of the two optical systems must be symmetrical with respect to the center of image sensor 4, so that the two optical systems are symmetrical about the center of image sensor 4, that is, each occupies half of the area of ​​the image.

[0050] Furthermore, the maximum outer diameter of the lens is less than 2.5 mm, and the thickness of the mounting shell 1 is less than 5.6 mm.

[0051] This results in a relatively small and compact overall structure, meeting the requirements for lightweight applications.

[0052] Furthermore, the lens consists of a dual-lens system consisting of lens A and lens B;

[0053] The lens A, along its optical axis from the object side to the image side, consists of lens 51, aperture 52, lens 53, and protective plate 54. Lens 51 has a focal length of -18.63 to -18.53 mm, a refractive index of 1.5 to 1.7, an Abbe number of 23.0 to 24.0, a radius of curvature of 1.88 to 1.98 on the object side, and a thickness interval of 0.95 to 1.05 mm. The radius of curvature of the image side is 1.28 to 1.38, and the thickness interval is 0 to 0.1 mm. Aperture 52 has a thickness interval of 0 to 0.09 mm. Lens 53 has a focal length of 2... The refractive index of the object side plate is 1.77–2.87 mm, the refractive index is 1.4–1.6, the Abbe number is 55.2–56.2, the radius of curvature of the object side plate is -1.78–-1.68, the thickness interval is 0.95–1.05 mm, the radius of curvature of the image side plate is -1.03–-0.92, and the thickness interval is 2.48–2.58 mm; the refractive index of the protective plate 54 is 1.0–2.0, the Abbe number is 63.7–64.7, the thickness interval of the object side plate is 0.65–0.75 mm, and the thickness interval of the image side plate is 1.01–1.11 mm.

[0054] Lens B, along its optical axis from object side to image side, consists of lens 3 (61), aperture 2 (62), lens 4 (63), and protective plate 2 (64). Lens 3 (61) has a focal length of 3.32–3.42 mm, a refractive index of 1.4–1.6, an Abbe number of 55.2–56.2, an object-side radius of curvature of 0.99–1.09, and a thickness interval of 0.95–1.05 mm; the image-side radius of curvature is 1.56–1.67, and the thickness interval is 0–0.1 mm. Aperture 2 (62) has a thickness interval of 0.09–0.15 mm. Lens 4 (63) has a focal length of -6.57–-6.47 mm, a refractive index of 1.5–1.7, an Abbe number of 23.0–24.0, and an object-side radius of curvature of L. 41 The refractive index of the first protective film is -1.30 to -1.20, the thickness interval is 0.95 to 1.05 mm, the radius of curvature of the image side is -2.38 to -2.28, and the thickness interval is 0.94 to 1.04 mm; the refractive index of the second protective film 64 is 1.0 to 2.0, the Abbe number is 63.7 to 64.7, the thickness interval of the object side is 0.65 to 0.75 mm, and the thickness interval of the image side is 2.95 to 3.05 mm.

[0055] Lens A has a focal length of 3.5–4.5 mm, a back focal length of 3.79–4.79 mm, and a total optical system length of 6.33–6.43 mm. Lens B has a focal length of 6–7 mm, a back focal length of 4.19–5.19 mm, and a total optical system length of 6.83–6.93 mm.

[0056] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-lens mounting bracket, characterized in that, The device includes a mounting shell, one side of which has a mounting groove. The mounting groove has two symmetrically distributed mirror holes, and each mirror hole has a lens groove. The lens grooves are "D"-shaped, and the straight edges of the "D"-shaped lens grooves are arranged opposite each other to form a partition. The mounting groove on the mirror hole side has a filter groove, and the inner wall of the mounting groove between the mirror holes has a light-shielding groove.

2. The dual-lens mounting bracket according to claim 1, characterized in that, The curved surface of the "D"-shaped lens groove is an arc shape, and the center of the two lenses is equidistant from the light-shielding groove.

3. A dual-lens mounting bracket according to claim 1, characterized in that, The filter plate slot is provided with glue dispensing grooves at the four corners.

4. A dual-lens mounting bracket according to claim 1, characterized in that, The thickness of the partition is 0.5-1mm.

5. A dual-lens mounting bracket according to claim 4, characterized in that, The thickness of the partition is 0.8 mm.

6. A dual-lens scanning mechanism, characterized in that, The mounting housing of the mounting base according to any one of claims 1-5 has lenses with different focal lengths in the two lens slots, a filter in the filter slot, and a light-shielding plate in the light-shielding slot.

7. A dual-lens scanning mechanism according to claim 6, characterized in that, The lenses have different field of view.

8. A dual-lens scanning mechanism according to claim 6, characterized in that, An image sensor is provided on the image side of the mounting housing, and the center of the image sensor coincides with the center of the light-shielding plate.

9. A dual-lens scanning mechanism according to claim 6, characterized in that, The maximum outer diameter of the lens is less than 2.5 mm, and the thickness of the mounting shell is less than 5.6 mm.

10. A dual-lens scanning mechanism according to claim 6, characterized in that, The lens consists of a dual-lens system, consisting of lens A and lens B. Lens A, along its optical axis from object side to image side, consists of lens one, aperture one, lens two, and protective plate one. Lens one has a focal length of -18.63 to -18.53 mm, a refractive index of 1.5 to 1.7, an Abbe number of 23.0 to 24.0, an object-side radius of curvature of 1.88 to 1.98, and a thickness interval of 0.95 to 1.05 mm; the image-side radius of curvature is 1.28 to 1.38, and the thickness interval is 0 to 0.1 mm. Aperture one has a thickness interval of 0 to 0.09 mm. Lens two has a focal length of 2.77 mm. The first protective sheet has a refractive index of 1.4–1.6 and an Abbe number of 55.2–56.

2. Its object side has a radius of curvature of -1.78–1.68 and a thickness interval of 0.95–1.05 mm, while its image side has a radius of curvature of -1.03–0.92 and a thickness interval of 2.48–2.58 mm. The second protective sheet has a refractive index of 1.0–2.0 and an Abbe number of 63.7–64.

7. Its object side has a thickness interval of 0.65–0.75 mm, while its image side has a thickness interval of 1.01–1.11 mm. Lens B, along its optical axis from object side to image side, consists of lens three, aperture two, lens four, and protective plate two. Lens three has a focal length of 3.32–3.42 mm, a refractive index of 1.4–1.6, an Abbe number of 55.2–56.2, an object-side radius of curvature of 0.99–1.09, and a thickness interval of 0.95–1.05 mm; the image-side radius of curvature is 1.56–1.67, and the thickness interval is 0–0.1 mm. Aperture two has a thickness interval of 0.09–0.15 mm. Lens four has a focal length of -6.57–-6.47 mm, a refractive index of 1.5–1.7, and an Abbe number of 23.0–24.

0. The object-side radius of curvature L… 41 The first protective film has a refractive index of -1.30 to -1.20 and a thickness interval of 0.95 to 1.05 mm. The image side has a radius of curvature of -2.38 to -2.28 and a thickness interval of 0.94 to 1.04 mm. The second protective film has a refractive index of 1.0 to 2.0 and an Abbe number of 63.7 to 64.

7. The object side has a thickness interval of 0.65 to 0.75 mm and the image side has a thickness interval of 2.95 to 3.05 mm.

Images