Protective cover for laser beam expander

Abstract

The utility model discloses a laser beam expander protective cover, which belongs to the technical field of laser beam expanders, and comprises a laser beam expander body, a cover body is sleeved outside the laser beam expander body, a pipe body is fixedly connected inside the cover body, a connecting rod is inserted inside the pipe body, one end of the connecting rod is fixedly connected with a circular plate, and the other end of the connecting rod is fixedly connected with a connecting rod. According to the utility model, the cover body is sleeved outside the laser beam expander body and is matched with the pluggable cover body, so that the lens can be effectively protected when the laser beam expander is not used, the lens is prevented from being damaged due to dust, sundries and contact with foreign matters, and the normal operation of a laser processing system is ensured; meanwhile, a circular plate with cleaning cotton is arranged in the cover body and is matched with a connecting rod and a rebound mechanism, so that the surface of the lens can be conveniently cleaned, a complicated structure does not need to be disassembled, the operation is simple, the cover body can be stably fixed on the beam expander body through a fastening bolt, the protection and cleaning functions are achieved, and the practicability is high. And the use safety and the maintenance convenience of the laser beam expander are improved.

Description

Technical Field

[0001] This utility model relates to the field of laser beam expander technology, specifically a protective cover for a laser beam expander. Background Technology

[0002] A beam expander is a lens assembly that can change the diameter and divergence angle of a laser beam. We usually use the divergence parameters of a beam as a characteristic of a perfect Gaussian laser beam. Divergence refers to the unfolding of light waves at a certain angle during their propagation in space. Even perfectly normal light rays without any abnormalities will experience some beam divergence due to diffraction. Diffraction refers to the bending effect of light when it is cut by an opaque object, such as a knife edge. The unfolding occurs from the secondary wavefronts emitted at the cut edge. These secondary waves interfere with the main wave and also interfere with each other, which can sometimes form complex diffraction patterns.

[0003] However, existing laser beam expanders typically lack protective mechanisms. When not in use, they are prone to accumulating dust and debris, which can strongly absorb laser energy, causing localized burning of the lens near the contaminated area. This leads to further absorption of laser energy, increased aberrations in the emitted light, and ultimately, disruption of the entire laser processing system. Furthermore, the lens is susceptible to contact with foreign objects, resulting in lens damage. Therefore, a protective cover for laser beam expanders is proposed. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0005] Therefore, one objective of this utility model is to provide a protective cover for a laser beam expander. This protective cover allows for convenient cleaning of the lens surface without disassembling complex structures, is easy to operate, and can be firmly fixed to the beam expander body by fastening bolts. It combines protection and cleaning functions, improving the safety and ease of maintenance of the laser beam expander.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a laser beam expander protective cover, comprising: a laser beam expander body, a cover sleeved on the outside of the laser beam expander body, a tube fixedly connected inside the cover, a connecting rod inserted inside the tube, a circular plate fixedly connected to one end of the connecting rod, the circular plate slidably connected to the inside of the cover, a cleaning cotton fixedly connected to the outside of the circular plate, and a spring-loaded mechanism installed on the outside of the connecting rod.

[0007] Preferably, the cover has an annular slot inside, a cover is inserted into the annular slot, and a protrusion is fixedly connected to the outside of the cover.

[0008] Preferably, the diameter of the annular slot is larger than the diameter of the cleaning cotton.

[0009] Preferably, the rebound mechanism includes a sliding ring, which is fixedly connected to the outside of the connecting rod. A spring is sleeved on the outside of the connecting rod, and a fixing ring is fixedly connected to the inside of the tube. One end of the spring abuts against the outside of the fixing ring, and the connecting rod passes through the inner ring of the fixing ring.

[0010] Preferably, the external threaded connection of the cover has two fastening bolts.

[0011] Preferably, a knob is fixedly connected to the other end of the connecting rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention utilizes a cover fitted over the laser beam expander body, along with a pluggable cap, to effectively protect the lens when not in use. This prevents damage from dust, debris, and foreign objects, ensuring the normal operation of the laser processing system. Simultaneously, the cover contains a circular plate with cleaning cotton, which, along with a connecting rod and a spring-loaded mechanism, allows for convenient cleaning of the lens surface without disassembling complex structures. The operation is simple, and the cover is securely fixed to the beam expander body using bolts, combining protection and cleaning functions to enhance the safety and ease of maintenance of the laser beam expander. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the laser beam expander protective cover of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the protective cover of the laser beam expander of this utility model;

[0016] Figure 3 The present invention provides a protective cover for a laser beam expander. Figure 2 A magnified structural diagram of area A in the diagram.

[0017] In the diagram: 1. Laser beam expander body; 2. Cover; 3. Fastening bolt; 4. Tube; 5. Knob; 6. Circular plate; 7. Cleaning cotton; 8. Protrusion; 9. Circular slot; 10. Cover; 11. Spring; 12. Connecting rod; 13. Sliding ring; 14. Fixing ring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-3 An embodiment of this utility model provides a protective cover for a laser beam expander, comprising: a laser beam expander body 1, a cover 2, a tube 4, a circular plate 6, and a cleaning cotton 7.

[0020] The cover 2 is fitted onto the outside of the laser beam expander body 1. The tube 4 is fixedly connected to the inside of the cover 2. A connecting rod 12 is inserted into the inside of the tube 4. A circular plate 6 is fixedly connected to one end of the connecting rod 12. The circular plate 6 is slidably connected to the inside of the cover 2. A cleaning cotton 7 is fixedly connected to the outside of the circular plate 6. A spring mechanism is installed on the outside of the connecting rod 12. A knob 5 is fixedly connected to the other end of the connecting rod 12.

[0021] The cover 2 has an annular slot 9 inside, and a cover 10 is inserted into the annular slot 9. A protrusion 8 is fixedly connected to the outside of the cover 10.

[0022] The diameter of the annular slot 9 is larger than the diameter of the cleaning cotton 7.

[0023] The spring-rebound mechanism includes a sliding ring 13, which is fixedly connected to the outside of the connecting rod 12. A spring 11 is sleeved on the outside of the connecting rod 12. A fixing ring 14 is fixedly connected inside the tube body 4. One end of the spring 11 abuts against the outside of the fixing ring 14. The connecting rod 12 passes through the inner ring of the fixing ring 14.

[0024] When it is necessary to clean the lens of the laser beam expander body 1, remove the cover 2 and pull the protrusion 8 to remove the cover 10. Drip a small amount of cleaning agent onto the cleaning cotton 7 and replace the cover 2. Press the connecting rod 12 to push the circular plate 6 so that the cleaning cotton 7 can be attached to the surface of the lens of the laser beam expander body 1. Rotate the knob 5 to clean the surface of the lens of the laser beam expander body 1.

[0025] The outer threaded connection of the cover 2 has two fastening bolts 3.

[0026] After cleaning, insert the cover 10 back into the annular slot 9, then put the cover 2 back on and tighten the fastening bolt 3 to fix the cover 2 onto the laser beam expander body 1 to protect the lens.

[0027] Based on the above technical solution, the working steps of this solution are summarized as follows: When it is necessary to clean the lens of the laser beam expander body 1, remove the cover 2 and then pull the protrusion 8 to remove the cover 10. Drip a small amount of cleaning agent onto the cleaning cotton 7 and replace the cover 2. Press the connecting rod 12 to push the circular plate 6 so that the cleaning cotton 7 is attached to the surface of the lens of the laser beam expander body 1. Rotate the knob 5 to clean the surface of the lens of the laser beam expander body 1. After cleaning, insert the cover 10 back into the annular slot 9, then replace the cover 2 and tighten the fastening bolt 3 to fix the cover 2 on the laser beam expander body 1 to protect the lens.

[0028] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective cover for a laser beam expander, characterized in that, include: A laser beam expander body (1) is fitted with a cover (2) on the outside of the laser beam expander body (1). A tube (4) is fixedly connected inside the cover (2). A connecting rod (12) is inserted into the tube (4). A circular plate (6) is fixedly connected to one end of the connecting rod (12). The circular plate (6) is slidably connected to the inside of the cover (2). A cleaning cotton (7) is fixedly connected to the outside of the circular plate (6). A spring mechanism is installed on the outside of the connecting rod (12).

2. The laser beam expander protective cover according to claim 1, characterized in that: The cover (2) has an annular slot (9) inside, and a cover (10) is inserted into the annular slot (9). A protrusion (8) is fixedly connected to the outside of the cover (10).

3. A protective cover for a laser beam expander according to claim 2, characterized in that: The diameter of the annular slot (9) is larger than the diameter of the cleaning cotton (7).

4. The laser beam expander protective cover according to claim 1, characterized in that: The rebound mechanism includes a sliding ring (13), which is fixedly connected to the outside of the connecting rod (12). A spring (11) is sleeved on the outside of the connecting rod (12). A fixing ring (14) is fixedly connected inside the tube (4). One end of the spring (11) abuts against the outside of the fixing ring (14). The connecting rod (12) passes through the inner ring of the fixing ring (14).

5. A protective cover for a laser beam expander according to claim 1, characterized in that: The outer threaded connection of the cover (2) has two fastening bolts (3).

6. A protective cover for a laser beam expander according to claim 1, characterized in that: A knob (5) is fixedly connected to the other end of the connecting rod (12).

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