Integrated ultraviolet laser marking device and ultraviolet laser marking system

Abstract

The utility model provides an integrated ultraviolet laser marking device and an ultraviolet laser marking system. The integrated ultraviolet laser marking device comprises a sealed cavity, and an ultraviolet laser generating assembly, a beam expander, a scanning galvanometer and a field lens which are sequentially arranged in the sealed cavity along the transmission direction of ultraviolet laser, a bottom plate of the sealed cavity is provided with a light outlet window used for emitting ultraviolet laser out of the sealed cavity, the projection of the ultraviolet laser generating assembly on the bottom plate is located on the outer side of the light outlet window, and the beam expander, the scanning galvanometer and the field lens are arranged on the side face of the ultraviolet laser generating assembly. And the field lens is positioned right above the light emitting window. According to the integrated ultraviolet laser marking device, the light emitting window is arranged on the bottom plate of the sealed cavity, so that the integrated ultraviolet laser marking device can be conveniently erected above a production line, and compared with a traditional laser which emits light at the front end and is installed on the side edge of the production line, space can be saved; and meanwhile, the ultraviolet laser generating assembly, the beam expander, the scanning galvanometer and the field lens are arranged around the light outlet window, so that the overall length of the device is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of packing bag code spraying, and particularly relates to an integrated ultraviolet laser marking device and an ultraviolet laser marking system. BACKGROUND

[0002] Food and medicine packaging needs to be marked with information such as usage instructions, ingredient tables, and anti-counterfeit marks. Currently, most of the industry uses ink jet printers for marking. Ink jet printers need to be replaced regularly, and there is a risk of ink falling off, and they also pollute the environment. In the prior art, laser marking has replaced ink jet marking, such as the solutions in patents CN117885448 A, CN220943705 U, and CN115946449 A. However, in CN220943705 U, a fiber laser is used as the light source. Due to the limitations of fiber materials, the light source wavelength should be 1064 nm infrared light, which has a greater thermal impact on thin film materials and can easily cause thin film perforation. In CN117885448 A, the type of light source is not introduced. In this solution, the light source is placed on the side of the assembly line, which occupies a large amount of space. In CN117885448 A, the laser is placed above the assembly line to save space, but the specific form of the laser marking system is not given. SUMMARY

[0003] The utility model aims to provide an integrated ultraviolet laser marking device that can at least solve some of the problems in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] An integrated ultraviolet laser marking device includes a sealed cavity, and an ultraviolet laser generation assembly, a beam expander, a scanning galvanometer, and a field lens arranged in the sealed cavity along the direction of ultraviolet laser transmission. A light exit window is provided on the bottom plate of the sealed cavity for the ultraviolet laser to exit the sealed cavity. The ultraviolet laser generation assembly projects outside the light exit window on the bottom plate. The beam expander, scanning galvanometer, and field lens are arranged on the side of the ultraviolet laser generation assembly. The field lens is located directly above the light exit window.

[0006] Further, the ultraviolet laser generation assembly includes a pump source and a laser. The pump source is connected to the laser through an optical fiber.

[0007] Further, the laser is located on one side of the light exit window, and the pump source is located on one side of the laser axis.

[0008] Further, the light outlet of the laser is located at the side of the laser, the light inlet of the beam expander receives the ultraviolet laser emitted by the light outlet of the laser, and the beam expander and the pump source are projected on the opposite sides of the light outlet window on the bottom plate.

[0009] Further, the projection of the beam expander and the scanning galvanometer on the bottom plate is located on different sides of the light outlet window, and a turning mirror for turning the ultraviolet laser is arranged between the beam expander and the scanning galvanometer.

[0010] Further, the light outlet window is located at the center of the bottom plate.

[0011] Further, the bottom plate is detachably connected with a protective lens corresponding to the light outlet window.

[0012] Further, the bottom plate has a lens slot for inserting the protective lens, and the protective lens is inserted into the lens slot.

[0013] Further, the side plate of the sealed cavity is provided with a heat sink.

[0014] In addition, the utility model also provides an ultraviolet laser marking system, including the conveyer belt for conveying the film to be processed and above-mentioned integrated ultraviolet laser marking device, the sealed cavity is set up above the conveyer belt, and the light outlet window of the sealed cavity is opposite the conveyer belt upper surface.

[0015] Compared with the prior art, the utility model has the beneficial effects of:

[0016] (1) the integrated ultraviolet laser marking device sets the light outlet window position on the bottom plate of the sealed cavity, so as to be conveniently arranged above the production line, compared with the traditional front light outlet, the laser installed on the side of the production line can save space, and the ultraviolet laser generating assembly, the beam expander, the scanning galvanometer and the field lens are arranged around the light outlet window, so that the length of the device is reduced.

[0017] (2) the integrated ultraviolet laser marking device is also provided with a protective lens, and the protective lens can be quickly replaced, so that the maintenance is facilitated, and the service life of the integrated ultraviolet laser marking device is improved.

[0018] The utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the internal plan view schematic diagram of the integrated ultraviolet laser marking device of the utility model;

[0020] Figure 2Is the sectional view schematic diagram of the integrated ultraviolet laser marking device of the utility model;

[0021] Figure 3 Is the protective lens installation schematic diagram of the integrated ultraviolet laser marking device in working state of the utility model;

[0022] Figure 4 Is the protective lens replacement schematic diagram in the integrated ultraviolet laser marking device of the utility model;

[0023] Figure 5 Is the ultraviolet laser marking system schematic diagram in the utility model.

[0024] Mark description: 1, sealed cavity;2, pump source;3, optical fiber;4, laser;5, light window;6, beam expander mirror;7, turning mirror;8, scanning galvanometer;9, field lens;10, radiator;11, bottom plate;12, protective lens;13, ear block;14, conveying belt;15, film to be processed. Specific implementation

[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, apparently, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0026] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0027] In the description of the utility model, it is explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, can also be abutting connection or integrally connected, for the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] For example, the protective lens 12 is arranged on the bottom plate 11, and the protective lens 12 is arranged on the bottom plate 11. Figures 1 to 4As shown, the embodiment provides an integrated ultraviolet laser marking device, which comprises a sealed cavity 1, and an ultraviolet laser generating assembly, a beam expander 6, a scanning galvanometer 8 and a field lens 9 arranged in the sealed cavity 1 in sequence along the ultraviolet laser transmission direction. An outlight window 5 for emitting ultraviolet laser out of the sealed cavity 1 is arranged on the bottom plate 11 of the sealed cavity 1, the ultraviolet laser generating assembly is projected on the outside of the outlight window 5 on the bottom plate 11, the beam expander 6, the scanning galvanometer 8 and the field lens 9 are arranged on the side of the ultraviolet laser generating assembly, and the field lens 9 is located directly above the outlight window 5. In this embodiment, ultraviolet laser is used as the light source, which can avoid the problem that the existing infrared light has a large thermal influence on thin film materials and is easy to cause thin film perforation, and the optical elements for ultraviolet laser marking are integrated in the sealed cavity 1, so that the miniaturization design of the ultraviolet laser marking device can be realized. In addition, the position of the outlight window 5 is arranged on the bottom plate 11 of the sealed cavity 1, so that it is convenient to be placed above the production line. Compared with the traditional front light, the laser installed on the side of the production line can save space. At the same time, the ultraviolet laser generating assembly, the beam expander 6, the scanning galvanometer 8 and the field lens 9 are arranged around the outlight window 5, which reduces the overall length of the device.

[0029] As a specific embodiment, as shown in the drawings, Figure 1 As shown, the ultraviolet laser generating assembly comprises a pump source 2 and a laser 4, the pump source 2 is connected with the laser 4 through an optical fiber 3, the pump source 2 emits pump light, the pump light enters the laser 4 through the optical fiber 3, laser is emitted from the laser 4, enters the beam expander 6, and then enters the scanning galvanometer 8. The scanning galvanometer 8 controls the laser emission angle after receiving the external signal to form a marking pattern. The scanning galvanometer 8 is provided with a field lens 9 behind it for beam focusing. For example, the output power of the pump source 2 is 25w, the center wavelength is 808nm, about 5w laser is output after the laser 4, the wavelength of the laser is 355nm, a 2x beam expander 6 is selected, the spot diameter after expansion is about 2mm, the scanning speed of the scanning galvanometer 8 is 15000mm / s, the working range of the field lens 9 is about 100x100mm, the focal point is located 20mm below the bottom plate 11, and the focal depth is positive and negative 7mm.

[0030] In order to reduce the overall length of the device, the laser 4 can be designed to be located on one side of the outlight window 5, and the light inlet and the light outlet of the laser 4 are arranged on the side of the laser 4. The light inlet of the pump source 2 is connected with the light outlet of the laser 4, and the light inlet of the beam expander 6 receives the ultraviolet laser emitted from the light outlet of the laser 4. In this way, the pump source 2 and the beam expander 6 can be arranged on the side of the laser 4, the spatial position of the optical elements in the sealed cavity 1 is optimized, and the overall length of the device is reduced. Further, the beam expander 6 and the pump source 2 are projected on the opposite sides of the outlight window 5 on the bottom plate 11.

[0031] Optimally, the projection of the beam expander 6 and the scanning galvanometer 8 on the bottom plate 11 is located at different sides of the light exit window 5, further reasonably utilizing the internal space of the sealed cavity 1, and due to the arrangement of the beam expander 6 and the scanning galvanometer 8 at different sides, a turning mirror 7 is arranged between the beam expander 6 and the scanning galvanometer 8 to change the direction of the light emitted by the beam expander 6 so that it can be incident on the scanning galvanometer 8. In some embodiments, the light exit window 5 is designed as a square, and the light exit window 5 is arranged at the center of the bottom plate 11, and the pump source 2, the laser 4, the beam expander 6 and the scanning galvanometer 8 are arranged around the light exit window 5.

[0032] Optionally, as shown in Figure 3 and Figure 4 , a protective lens 12 is detachably connected to the bottom plate 11 at the position corresponding to the light exit window 5, and the light exit window 5 is sealed by the protective lens 12, which can protect the optical elements inside the sealed cavity 1 and prevent dust and other impurities from entering the sealed cavity 1, thereby affecting the laser marking effect. Due to the detachable connection between the protective lens 12 and the bottom plate 11, the protective lens 12 can be replaced and maintained, thereby prolonging the service life of the ultraviolet laser marking device.

[0033] In some embodiments, the bottom plate 11 is designed to have a lens slot for inserting the protective lens 12, and the lens slot is formed by extending a side edge of the bottom plate 11 in a direction parallel to the surface of the bottom plate 11 towards the light exit window 5, and the protective lens 12 is inserted into the lens slot, so that the protective lens 12 can completely cover the light exit window 5. In order to ensure the stability of the installation of the protective lens 12, corresponding screw holes can be provided on the protective lens 12 and the bottom plate 11, and the protective lens 12 and the bottom plate 11 can be fixed by screws. Optimally, in order to facilitate the extraction and insertion of the protective lens 12, an ear block 13 is designed on one side of the lens slot opening of the protective lens 12.

[0034] Optimally, a heat sink 10 is arranged on the side plate of the sealed cavity 1 to maintain the stability of the laser power.

[0035] In addition, the present embodiment also provides an ultraviolet laser marking system, as shown in Figure 5 , comprising a conveying belt 14 for conveying a film 15 to be processed, and the integrated ultraviolet laser marking device described above; the sealed cavity 1 is arranged directly above the conveying belt 14, and the light exit window 5 of the sealed cavity 1 is directly opposite the upper surface of the conveying belt 14.

[0036] The above examples are only illustrative of the present application and do not constitute a limitation on the scope of protection of the present application, and any design identical or similar to the present application falls within the scope of protection of the present application.

Claims

1. An integrated ultraviolet laser marking device, characterized by: The sealed cavity comprises a bottom plate, a side plate and a top plate, and is provided with an ultraviolet laser generating assembly, a beam expander, a scanning galvanometer and a field lens arranged in sequence along the transmission direction of the ultraviolet laser inside the sealed cavity; an outlight window for emitting ultraviolet laser out of the sealed cavity is arranged on the bottom plate, the ultraviolet laser generating assembly is projected on the outside of the outlight window on the bottom plate, the beam expander, the scanning galvanometer and the field lens are arranged on the side of the ultraviolet laser generating assembly, and the field lens is located directly above the outlight window.

2. The integrated ultraviolet laser marking device of claim 1, wherein: The ultraviolet laser generating assembly comprises a pump source and a laser, and the pump source is connected with the laser through an optical fiber.

3. The integrated ultraviolet laser marking device of claim 2, wherein: The laser is located on one side of the outlight window, and the pump source is located on one side of the laser axis.

4. The integrated ultraviolet laser marking device of claim 3, wherein: The light outlet of the laser is located on the side of the laser, the light inlet of the beam expander receives the ultraviolet laser emitted by the light outlet of the laser, and the beam expander and the pump source are projected on the opposite sides of the outlight window on the bottom plate.

5. The integrated ultraviolet laser marking device of claim 1, wherein: The projection of the beam expander and the scanning galvanometer on the bottom plate is located on different sides of the outlight window, and a turning mirror for turning the ultraviolet laser is arranged between the beam expander and the scanning galvanometer.

6. The integrated ultraviolet laser marking device of claim 1, wherein: The outlight window is located at the center of the bottom plate.

7. The integrated ultraviolet laser marking device of claim 1, wherein: A protective lens is detachably connected to the bottom plate corresponding to the outlight window.

8. The integrated ultraviolet laser marking device of claim 7, wherein: The bottom plate is provided with a lens groove for inserting the protective lens, and the protective lens is inserted into the lens groove.

9. The integrated ultraviolet laser marking device of claim 1, wherein: The side plate of the sealed cavity is provided with a heat sink.

10. An ultraviolet laser marking system characterized by: The integrated ultraviolet laser marking device comprises a conveying belt for conveying a film to be processed and the integrated ultraviolet laser marking device according to any one of claims 1-9; the sealed cavity is arranged directly above the conveying belt, and the outlight window of the sealed cavity is opposite to the upper surface of the conveying belt.

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