Cigarette laser zoom coding system

Abstract

The utility model discloses a cigarette laser zoom coding system, which comprises a fixed seat, a laser, a focus lens, a beam expander, a galvanometer and a secondary focus lens, and is characterized in that the laser is fixed on one side of the fixed seat; the focus lens is fixed on the same side of the fixed seat relative to the laser; the beam expander is slidably connected between the laser and the focus lens; the galvanometer is fixed at the end part of the fixed seat to reflect light; and the secondary focusing mirror is fixed on one side of the galvanometer for secondary focusing. The distance between the beam expander and the focus lens is changed, so that the diameter and divergence angle of a light beam can be changed in a two-dimensional space, fine coding on focuses of end faces of cigarettes in different postures during conveying movement of a sorting line is realized, and automatic adjustment of the focal length is realized by controlling movement of the beam expander according to position information of the cigarettes. The laser marking device can complete marking without physically moving a workpiece or a laser marking machine, can automatically adjust the focal length, can realize automatic tracking marking even if the thicknesses are different, remarkably improves the marking quality of products, and is simple and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of laser coding, and more specifically to a cigarette laser zoom coding system for the end face of special-shaped cigarettes. Background Art

[0002] To adapt to the development direction of regional logistics, during the sorting process of special-shaped cigarettes, in order to improve the cigarette loading rate, it is often necessary to load cigarettes of different retail customers into the same transfer box. As a result, when the deliveryman delivers cigarettes and encounters cigarettes of the same specification from different retail customers, it is difficult to quickly distinguish the cigarettes of the corresponding retail customers by the existing technical methods. It is necessary to judge which specific retail customer it is by means of the deliveryman's reading of the 32-bit code of the cigarette and the scanning of the two-dimensional code, which reduces the delivery efficiency.

[0003] There are the following several ways to adjust the focal length between the laser scanning head and the marker in the existing laser coding equipment: The first way of focusing is trial marking and focusing. This way will cause damage to the trial workpiece, especially valuable workpieces, and the loss is relatively large. The second method is manual adjustment, that is, the adjustment method of a mechanical manual knob. This adjustment method is time-consuming and laborious, with low adjustment accuracy, inconvenient adjustment, and more importantly, the adjustment level of manual adjustment varies from person to person, and it is difficult to keep the marking quality consistent. The third method is to obtain the three-dimensional information of the marked object in advance and adjust the focal length through the three-dimensional information of the object. Although this adjustment method can achieve automatic focal length adjustment, it has limitations. On the one hand, when the three-dimensional information of the object to be marked is not clear, this focusing method cannot be realized. On the other hand, this focusing method has complex processes and low marking efficiency.

[0004] Therefore, how to provide a cigarette laser zoom coding system for the end face of special-shaped cigarettes with a wide adaptability of coding distance, stable and reliable, and not easy to be damaged, and add household identification (such as: 1, 2, 3, 4, etc.) to the end face of special-shaped cigarettes, so that the deliveryman can easily identify which cigarettes belong to the same retail customer through the household identification, is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] In view of this, the utility model provides a cigarette laser zoom coding system, aiming to solve the above technical problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A cigarette laser zoom coding system includes:

[0008] A fixed seat,

[0009] A laser, and the laser is fixed on one side wall of the fixed seat;

[0010] A focusing lens, which is fixed on the same side of the fixed seat relative to the laser, and the laser emission end of the laser faces the focusing lens;

[0011] An expanding lens, which is slidably connected between the laser and the focusing lens;

[0012] A galvanometer, which is fixed at the end of the fixed seat relative to the focusing lens to reflect light;

[0013] A secondary focusing lens, which is fixed on one side of the galvanometer to focus the reflected light for the second time.

[0014] The beneficial effects of the above technical solution are as follows: The laser emitted by the laser passes through the expanding lens to change the beam diameter and divergence angle, magnify the light spot and correct the parallel light, and then passes through the focusing lens for focusing. The light is reflected to the secondary focusing lens by the galvanometer, and the secondary focusing lens focuses the light so that the beam reaches the focal plane for coding. By moving the expanding lens along the optical axis direction, the distance between the expanding lens and the focusing lens can be changed, so that the beam diameter and divergence angle can be changed in the two-dimensional space, and fine coding can be achieved at the end face focus of cigarettes in different postures.

[0015] Preferably, the galvanometer includes a box body and a lens. The box body is fixed at the end of the fixed seat. An entrance for light is provided on one side wall of the box body facing the focusing lens. The lens is obliquely fixed in the inner cavity of the box body, and the mirror surface of the lens faces the entrance. The secondary focusing lens is fixed on one side wall of the box body and is in optical path communication with the lens. The light focused by the focusing lens for the first time enters the box body through the entrance and is reflected to the secondary focusing lens by the lens.

[0016] Preferably, the center lines of the mirror surfaces of the expanding lens and the focusing lens coincide. This is beneficial to the transmission of light

[0017] Preferably, it further includes a conveyor belt. The fixed seat is provided on one side at the front end of the conveying direction of the conveyor belt, and the end of the conveying direction is docked with a sorting conveyor line to convey cigarettes. The conveyor belt is used to convey cigarettes.

[0018] Preferably, baffles are fixed on both sides of the conveying direction of the conveyor belt. Connecting rods are fixed on the top surfaces of the two baffles, and a plurality of cigarette posture detection sensors are fixed on the rod walls of the connecting rods. The cigarette posture sensors can detect the posture of cigarettes during the conveying process on the conveyor belt.

[0019] Preferably, a cigarette distance detection sensor is fixed on the top surface of the baffle close to the connecting rod. The cigarette distance detection sensor can detect the distance of the end face of the cigarette. The dynamic focusing system adjusts the position of the focusing light spot of the coder according to the height value to exactly coincide with the coding plane of the cigarette, so as to achieve online dynamic focusing coding.

[0020] Preferably, an encoder is fixed on the top surface of the baffle plate close to the galvanometer. After dynamic focusing is completed, coding is performed using the encoder.

[0021] Preferably, the axis of the connecting rod is perpendicular to the conveying direction of the conveyor belt.

[0022] Preferably, the laser is an ultraviolet laser.

[0023] Through the above technical solutions, compared with the prior art, the present utility model discloses a cigarette laser zoom coding system. The laser beam first enters the beam expander and the focusing lens, and then after being reflected and focused by the galvanometer, finally reaches the focal plane. By changing the distance between the beam expander assembly and the focusing lens, the diameter and divergence angle of the light beam can be changed in a two-dimensional space. The galvanometer emits the light beam, and the secondary focusing lens focuses it so that the light beam reaches the focal plane, realizing follow-up fine coding on the end face focus of cigarettes in different postures during the sorting and conveying movement, ensuring that the coded numbers are regular and do not deform.

[0024] The present utility model uses the position information of the cigarette to control the movement of the beam expander to realize automatic adjustment of the focal length, which can be completed without physically moving the workpiece or the laser marking machine. The focal length can be automatically adjusted, and automatic tracking marking can be realized even if there are thickness differences, which can not only reduce the workload but also significantly improve the quality of product marking, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0026] Figure 1 It is a schematic plan layout diagram of the coding system provided by the present utility model.

[0027] Among them,

[0028] 1 - Laser; 2 - Beam expander; 3 - Focusing lens; 4 - Galvanometer; 41 - Box body; 42 - Lens; 5 - Conveyor belt; 6 - Cigarette; 7 - Fixed seat; 8 - Connecting rod; 9 - Cigarette posture detection sensor; 10 - Encoder; 11 - Cigarette distance detection sensor; 12 - Secondary focusing lens; 13 - Baffle plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] See the attached Figure 1 , the embodiments of the present utility model disclose a laser zoom coding system for strip cigarettes, including:

[0031] Fixed seat 7,

[0032] Laser 1, and Laser 1 is fixed on one side wall of the fixed seat 7;

[0033] Focusing lens 3, and the focusing lens 3 is fixed on the same side of the fixed seat 7 opposite to the laser 1, and the laser emission end of the laser 1 faces the focusing lens 3;

[0034] Beam expander 2, and the beam expander 2 is slidably connected between the laser 1 and the focusing lens 3;

[0035] Galvanometer 4, and the galvanometer 4 is fixed at the end of the fixed seat 7 opposite to the focusing lens 3 to reflect light;

[0036] Secondary focusing lens 12, and the secondary focusing lens 12 is fixed on one side of the galvanometer 4 to perform secondary focusing on the reflected light.

[0037] In this embodiment, the beam expander moves along the optical axis direction through a high-speed transmission device. By changing the distance between the beam expander and the focusing lens, the diameter and divergence angle of the light beam can be changed in a two-dimensional space, so as to achieve fine coding on the focal point of the end faces of strip cigarettes in different postures during the sorting and conveying movement.

[0038] In order to further optimize the above technical solution and achieve precise focusing, the galvanometer 4 includes a box body 41 and a lens 42. The box body 41 is fixed at the end of the fixed seat 7. An entrance for light is opened on one side wall of the box body 41 facing the focusing lens 3. The lens 42 is obliquely fixed in the inner cavity of the box body 41, and the mirror surface of the lens 42 faces the entrance. The secondary focusing lens 12 is fixed on one side wall of the box body 41 and is in optical path communication with the lens 42. The focusing lens performs primary focusing first, the galvanometer reflects the light beam, and the secondary focusing lens performs secondary focusing, and finally the light beam reaches the focal plane (the end face of the strip cigarette) for coding.

[0039] In this embodiment, for the convenience of the transmission of the optical axis, the mirror center lines of the beam expander 2 and the focusing lens 3 coincide.

[0040] To further optimize the above technical solution, it further includes a conveyor belt 5. On one side of the front end in the conveying direction of the conveyor belt 5, there is a fixed seat 7, and the end in the conveying direction is docked with a sorting conveyor line to convey cigarette cartons 6.

[0041] In this embodiment, baffles 13 are fixed on both sides in the conveying direction of the conveyor belt 5. On the top surfaces of the two baffles 13, a connecting rod 8 is fixed, and a plurality of cigarette attitude detection sensors 9 are fixed on the rod wall of the connecting rod 8.

[0042] Since the attitude of cigarette cartons will change during transportation as the conveyor belt or the number of cigarette cartons increases. For example, a horizontally placed cigarette carton will become inclined during transportation. The cigarette attitude detection sensor can accurately judge the attitude of the cigarette carton entering the coding system, judge the inclination angle between the coding position and the focal plane, change the diameter and divergence angle of the light beam by adjusting the distance between the beam expander and the focusing lens, and then change the position of the focused light spot through the secondary focusing lens, so that the focus point is always directly opposite the outer wall of the cigarette carton, ensuring that the coded numbers are complete and do not deform.

[0043] To further optimize the above technical solution, a cigarette distance detection sensor 11 is fixed on the top surface of the baffle 13 close to the connecting rod 8.

[0044] The cigarette distance detection sensor can detect the distance of the end face of the cigarette carton, and the dynamic focusing system adjusts the position of the focused light spot of the coder to coincide exactly with the coding plane of the cigarette carton, thus realizing online dynamic focusing coding.

[0045] In this embodiment, an encoder 10 is fixed on the top surface of the baffle 13 close to the galvanometer 4. After the focal plane is focused on the outer wall of the cigarette carton, coding is performed by the encoder sensing the conveying speed of the sorting line.

[0046] To further optimize the above technical solution, the axis of the connecting rod 8 is perpendicular to the conveying direction of the conveyor belt 5.

[0047] To further optimize the above technical solution, the laser 1 is an ultraviolet laser. The ultraviolet laser device is equipped with a galvanometer whose focal length change range can reach 200 mm, and can adapt to the change of the attitude of cigarette cartons during transportation.

[0048] The utility model dynamically adjusts the focal length of the laser coder, adopts a coding method from left to right, which is convenient for the laser coding device to adapt to the development direction of tobacco logistics, and is convenient for on-site staff to detect the coding effect more conveniently. At the same time, it can also adapt to the growth of special-shaped cigarette categories and specifications in the future and different application scenarios. Try to make the functions comprehensive and the expandability good, which is conducive to adapting to future demand changes, function improvement and the introduction of new technologies. At the same time, mature computer and communication network technologies should be adopted to make the system have better reliability.

[0049] In the present specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cigarette laser zoom coding system, characterized in that: include: Fixed seat (7), A laser (1), wherein the laser (1) is fixed on a side wall of the fixing seat (7); A focusing mirror (3), the focusing mirror (3) being fixed on the same side of the fixing seat (7) as the laser (1), and the laser emitting end of the laser (1) facing the focusing mirror (3); A beam expander (2), wherein the beam expander (2) is slidably connected between the laser (1) and the focusing lens (3); A galvanometer (4), the galvanometer (4) being fixed to an end of the fixing seat (7) opposite to the focusing mirror (3) to reflect light; A secondary focusing mirror (12), the secondary focusing mirror (12) being fixed on one side of the galvanometer (4) to perform secondary focusing on the reflected light; The galvanometer (4) comprises a box (41) and a lens (42); the box (41) is fixed to the end of the fixing seat (7); a light inlet is provided on a side wall of the box (41) facing the focusing lens (3); the lens (42) is fixed at an angle in the inner cavity of the box (41), with the mirror surface of the lens (42) facing the inlet; the secondary focusing lens (12) is fixed to a side wall of the box (41) and is in optical communication with the lens (42).

2. The cigarette laser zoom coding system according to claim 1 is characterized in that: The center lines of the mirror surfaces of the beam expander (2) and the focusing mirror (3) coincide with each other.

3. The laser zoom coding system for cigarette strips according to claim 1 is characterized in that: It also comprises a conveyor belt (5), wherein the fixing seat (7) is provided at one side of the front end of the conveyor belt (5) in the conveying direction, and the end in the conveying direction is butted against a sorting conveyor line to convey the cigarette strips (6).

4. The cigarette laser zoom coding system according to claim 3 is characterized in that: Baffles (13) are fixed on both sides of the conveying direction of the conveyor belt (5), connecting rods (8) are fixed on the top surfaces of the two baffles (13), and a plurality of cigarette posture detection sensors (9) are fixed on the rod walls of the connecting rods (8).

5. The cigarette laser zoom coding system according to claim 4 is characterized in that: A cigarette distance detection sensor (11) is fixed to the top surface of the baffle (13) close to the connecting rod (8).

6. The cigarette laser zoom coding system according to claim 5, characterized in that: An encoder (10) is fixed on the top surface of the baffle (13) close to the galvanometer (4).

7. The cigarette laser zoom coding system according to claim 4, characterized in that: The axis of the connecting rod (8) is perpendicular to the conveying direction of the conveyor belt (5).

8. The cigarette laser zoom coding system according to claim 1, characterized in that: The laser (1) is an ultraviolet laser.

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