Fixture for eliminating clamping injury of core-taking lens

Abstract

The utility model relates to the technical field of optical lens processing equipment, in particular to a clamp for eliminating clamping injury of a core-taking lens, which comprises a clamp component, a clamping mounting part is arranged on the clamp component, a clamping piece for clamping the lens is arranged on the clamping mounting part, and the clamping piece is made of plastic materials. According to the utility model, the clamping piece used for clamping the lens is arranged on the clamping installation part, the clamping piece is made of the plastic material, and the plastic material has relatively high toughness and flexibility, so that the sharp edge on the clamping installation part can be prevented from being in contact with the lens in the process of clamping and fixing the lens by the clamping piece; therefore, the risk that the lens is damaged by clamping is effectively reduced, and the problems that in the core taking machining process of an existing lens, a metal clamp is often adopted for clamping and fixing, the surface of the lens is prone to being scratched in the clamping process due to the sharp edge and the rigidity characteristic of a metal material, resources are wasted, and the lens machining progress is seriously affected are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lens processing equipment, in particular to a clamp for eliminating the pinching damage of a lens when removing the core. Background Art

[0002] Lenses are an indispensable component of optical devices, primarily used to focus, refract, or disperse light. Depending on their material and intended use, lenses can be categorized as spherical, aspherical, convex, or concave. Lenses are widely used in eyeglasses, cameras, microscopes, and other optical instruments, altering the path of light to achieve functions such as imaging, magnification, and vision correction. Lens design and manufacturing techniques directly impact their optical performance and effectiveness. Driven by modern technology, lens technology is evolving towards lighter, thinner, and more intelligent lenses, bringing greater convenience and comfort to people's lives and work.

[0003] During the lens core removal process, ensuring stable lens clamping is a prerequisite for precise polishing. Traditionally, metal clamps are often used to fix the left and right sides of the lens. However, the sharp edges and rigidity of metal materials can easily scratch the lens surface during the clamping process, which not only wastes resources but also seriously affects the lens processing progress.

[0004] The present invention is proposed in view of the deficiencies in the prior art. Utility Model Content

[0005] In view of the above-mentioned problem that metal clamps are often used to clamp and fix lenses during the core extraction process, the sharp edges and rigidity of the metal material can easily scratch the lens surface during the clamping process, which not only wastes resources but also seriously affects the progress of lens processing. The technical solution adopted by the present invention to solve the technical problem is:

[0006] A clamp for eliminating the pinching damage of a cored lens comprises a clamp assembly, wherein the clamp assembly is provided with a clamping mounting portion, the clamping mounting portion is provided with a clamping piece for clamping the lens, and the clamping piece is made of plastic material.

[0007] Furthermore, the clamping mounting portion is made of copper, and the clamping piece is made of PEEK.

[0008] Furthermore, the length of the clamping mounting portion in the first direction is L1, the length of the clamping member in the first direction is L2, and L2>L1.

[0009] Furthermore, the height of the clamping mounting portion in the second direction is H1, the height of the clamping member in the second direction is H2, and H2>H1.

[0010] Furthermore, the clamping member is provided with a clamping portion that is obliquely extended toward the lens, and the diameter of the clamping portion is D.

[0011] Furthermore, the diameter D of the clamping portion is greater than 30 mm.

[0012] Furthermore, the diameter of the clamping portion is 14 mm ≤ D ≤ 30 mm.

[0013] Furthermore, the clamping portion includes a first clamping edge and a second clamping edge connected to the first clamping edge, and a chamfer is formed between the first clamping edge and the second clamping edge.

[0014] Furthermore, the clamp assembly is a hollow structure and forms an air flow channel, and the air flow channel extends and expands toward the lens.

[0015] Furthermore, a clamp joint is provided at one end of the clamp assembly away from the lens, and the clamp joint is threadedly connected to the clamp assembly pipe.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model provides a clamping piece for clamping the lens on the clamping mounting portion, and the clamping piece is made of a plastic material with high toughness and flexibility, so that the clamping piece can avoid the sharp edge of the clamping mounting portion from contacting the lens during the process of clamping and fixing the lens, thereby effectively reducing the risk of clamping and damaging the lens, and effectively solving the problem that in the core removal process of the existing lens, the sharp edge and rigidity of the metal material are often used for clamping and fixing, and the lens surface is easily scratched during the clamping process, which not only wastes resources but also seriously affects the progress of lens processing.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the clamp assembly of the utility model for clamping a lens;

[0020] Figure 2 A top view of the clamp assembly of the present invention;

[0021] Figure 3 for Figure 2 Schematic cross-sectional view along line AA;

[0022] Figure 4 for Figure 3 An enlarged schematic diagram of the labeled section B;

[0023] Figure 5 This is a structural diagram of the connection between the clamp assembly and the clamp joint of the utility model. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0025] like Figures 1 to 5 A clamp for eliminating the pinching of a lens during core removal is shown, comprising a clamp assembly 1, wherein the clamp assembly 1 is provided with a clamping mounting portion 3, wherein the clamping mounting portion 3 is provided with a clamping member 2 for clamping the lens, wherein the clamping member 2 is made of plastic material;

[0026] The utility model provides a clamping piece for clamping the lens on the clamping mounting portion, and the clamping piece is made of a plastic material with high toughness and flexibility, so that the clamping piece can avoid the sharp edge of the clamping mounting portion from contacting the lens during the process of clamping and fixing the lens, thereby effectively reducing the risk of clamping and damaging the lens, and effectively solving the problem that in the core removal process of the existing lens, the sharp edge and rigidity of the metal material are often used for clamping and fixing, and the lens surface is easily scratched during the clamping process, which not only wastes resources but also seriously affects the progress of lens processing.

[0027] Furthermore, by providing a clamping mounting portion 3 for mounting the clamping member 2 on the clamp assembly 1, the connection between the clamp assembly 1 and the clamping member 2 is made more compact, which helps to reduce unnecessary space occupation, thereby making the structure of the clamp assembly 1 more compact.

[0028] Furthermore, the arrangement of the clamping mounting portion 3 can provide stable support and positioning reference for the clamping member 2, so that the clamping member 2 can maintain a stable posture and position during the process of clamping the lens, thereby improving the stability of clamping the lens.

[0029] Furthermore, the provision of the clamping mounting portion 3 is conducive to dispersing the pressure applied to the clamping member 2 , thereby reducing local stress concentration and effectively lowering the risk of damage to the clamping member 2 .

[0030] Optionally, in some embodiments, the clamping member 2 is located on the inner wall of the clamping mounting portion 3 and extends toward the lens. The clamping member 2 is located between the clamping mounting portion 3 and the lens, which helps to avoid contact between the sharp edge of the clamping mounting portion 3 and the lens, thereby effectively reducing the risk of clamping the lens.

[0031] Optionally, in some embodiments, the clamping member 2 is located between the inner wall and the outer wall of the clamping mounting portion 3, the clamping mounting portion 3 is provided with a protrusion, and the clamping member 2 is provided with a recessed position matching the protrusion, so that the clamping member 2 can completely cover the inner wall and the outer wall of the clamping mounting portion 3, which is beneficial to avoid the sharp edge of the clamping mounting portion 3 from contacting the lens, thereby effectively reducing the risk of clamping the lens.

[0032] Furthermore, as a preferred embodiment of the present invention but not a limitation, the clamping member 2 is located on the outer wall of the clamping mounting portion 3 and extends toward the lens. The clamping member 2 is located between the clamping mounting portion 3 and the lens, which helps to avoid contact between the sharp edge of the clamp assembly 1 and the lens, thereby effectively reducing the risk of clamping the lens.

[0033] Optionally, in some embodiments, the cross-sections of the clamp assembly 1 and the clamping member 2 are rectangular.

[0034] Furthermore, as a preferred embodiment of the present invention but not a limitation thereof, the cross-sections of the clamp assembly 1 and the clamping member 2 are in a convex shape.

[0035] like Figures 1 to 5 The clamping mounting portion 3 shown is made of copper, and the clamping member 2 is made of PEEK;

[0036] Optionally, in some embodiments, the material of the clamping mounting portion 3 is stainless steel, aluminum alloy, alloy steel or copper.

[0037] Furthermore, as a preferred embodiment of the present invention but not a limitation thereof, the clamping and mounting portion 3 is made of copper.

[0038] Optionally, in some embodiments, the material of the clamping member 2 is polyphenylene sulfide, polypropylene or PEEK.

[0039] Furthermore, as a preferred embodiment of the present invention but not a limitation thereof, the clamping member 2 is made of PEEK material.

[0040] Furthermore, the clamping member 2 is made of PEEK material, which also has excellent wear resistance and high temperature resistance, and can maintain stable performance during the lens core removal process, which is beneficial to reducing deformation or performance degradation caused by temperature increase, and is beneficial to improving the stability of the lens during processing.

[0041] Optionally, in some embodiments, a threaded hole is provided on the clamping mounting portion 3, and the clamping member 2 made of PEEK material is fixed to the clamping mounting portion 3 by screws.

[0042] Optionally, in some embodiments, the clamp mounting portion 3 is bonded to the clamping member 2 by an industrial adhesive.

[0043] like Figures 1 to 5 The length of the clamping mounting portion 3 in the first direction is L1, and the length of the clamping member 2 in the first direction is L2, where L2>L1;

[0044] Specifically, the first direction is the direction of the clamp assembly 1 toward the lens.

[0045] Furthermore, the setting of L2>L1 enables the clamping member 2 to be fixed on the clamping mounting portion 3 with a larger contact area, which helps to disperse the stress and friction generated by the clamping member 2 in the process of clamping the lens, thereby improving the clamping stability; secondly, the larger contact area makes it difficult for the clamping member 2 to slide or deflect on the clamping mounting portion 3, which is conducive to improving the stability of the clamping member 2.

[0046] Furthermore, the longer arrangement of the clamping member 2 enables the clamping member 2 to adapt to lenses of different sizes or shapes, thereby improving the flexibility of the device in use.

[0047] Furthermore, the longer arrangement of the clamping member 2 can more evenly distribute the applied pressure, which is beneficial to reducing local stress concentration, thereby reducing the risk of damage to the clamping member 2 and the lens.

[0048] Furthermore, the longer setting of the clamping member 2 is conducive to isolating the contact between the clamp assembly 1 and the lens, and is conducive to avoiding the contact between the sharp edge of the clamp assembly 1 and the lens, thereby effectively reducing the risk of pinching the lens.

[0049] like Figures 1 to 5 The height of the clamping mounting portion 3 in the second direction is H1, and the height of the clamping member 2 in the second direction is H2, where H2>H1;

[0050] Specifically, the second direction is perpendicular to the first direction, and the second direction is the diameter or length direction of the lens.

[0051] Furthermore, the setting of H2>H1 makes the thicker clamping part 2 have higher structural strength. During the clamping process, the clamping part 2 needs to withstand the reaction force from the lens and the clamp assembly 1 as well as possible external impacts. The thicker clamping part 2 can better resist these forces, which is beneficial to reduce the risk of bending or deformation of the clamping part 2, thereby ensuring the stability and reliability of the clamping.

[0052] Furthermore, the thicker clamping part 2 has better fatigue resistance. During the repeated clamping and lens core removal process, the clamping part 2 will be subjected to periodic stress. The thicker clamping part 2 can better disperse the stress, which is beneficial to reduce the stress concentration phenomenon, thereby reducing the risk of the clamping part 2 being damaged due to fatigue.

[0053] like Figures 1 to 5 The clamping member 2 shown is provided with a clamping portion 21 extending obliquely toward the lens, and the diameter of the clamping portion 21 is D;

[0054] Furthermore, the clamping portion 21 is arranged to extend obliquely toward the lens so that the clamping portion 21 can better fit the curved surface or edge of the lens, which is beneficial to reducing gaps and looseness during the clamping process, thereby improving the stability of clamping; secondly, the inclined clamping portion 21 can ensure that the lens is subjected to evenly distributed force during the clamping process, which is beneficial to avoid damage to the lens or unstable clamping caused by excessive force at a single point.

[0055] Furthermore, the arrangement of the clamping portion 21 extending obliquely toward the lens can better fit the lens surface, which is beneficial to increasing the contact area, thereby improving the clamping force of the lens.

[0056] like Figures 1 to 5 The diameter D of the clamping portion 21 shown is greater than 30 mm;

[0057] Optionally, in some embodiments, when the clamp assembly 1 clamps a large-sized lens, the diameter D of the clamping portion 21 is greater than 30 mm.

[0058] Furthermore, the larger diameter clamping portion 21 has a larger contact area with the lens, which helps to increase the stability and clamping force during clamping. When clamping a large-sized lens, a stronger clamping force is required to ensure that the lens will not loosen or fall off during processing, testing or use.

[0059] Furthermore, the clamping portion 21 with a larger diameter can better disperse the applied pressure, which is beneficial to reducing local stress and reducing the risk of deformation or damage of the lens during the clamping process.

[0060] Optionally, in some embodiments, D=35 mm, and the clamping portion 21 with a diameter of 35 mm can provide a moderate clamping force, which is neither too strong nor too weak, and effectively ensures the stability of the lens during the processing.

[0061] Optionally, in some embodiments, D=40 mm, and the clamping portion 21 with a diameter of 40 mm can provide a stronger clamping force, so that the clamp assembly 1 can stably clamp large-sized lenses, thereby effectively broadening the application range of the clamp assembly 1.

[0062] like Figures 1 to 5 The diameter of the clamping portion 21 shown is 14 mm ≤ D ≤ 30 mm;

[0063] Optionally, in some embodiments, when the clamp assembly 1 clamps a small-sized lens, the diameter of the clamping portion 21 is: 14 mm ≤ D ≤ 30 mm.

[0064] Furthermore, the setting of 14mm≤D≤30mm enables the clamping portion 21 to stably clamp relatively small or medium-sized lenses. Whether clamping small precision lenses or slightly larger general lenses, the clamping portion 21 can stably clamp them, which is beneficial to improving the versatility and adaptability of the clamp assembly 1.

[0065] Furthermore, the setting of 14 mm ≤ D ≤ 30 mm enables the clamping portion 21 to provide a moderate clamping force, which will not damage the lens due to excessive clamping force, nor will it cause the lens to become loose due to insufficient clamping force.

[0066] Optionally, in some embodiments, D=14 mm, and the clamping portion 21 with a diameter of 14 mm is suitable for clamping small and delicate lenses, and can more accurately control the clamping position and force, effectively avoiding unnecessary loss or deformation of small lenses.

[0067] Optionally, in some embodiments, D=15 mm, and the clamping portion 21 with a diameter of 15 mm is relatively compact in structure and suitable for use in occasions with limited space.

[0068] Optionally, in some embodiments, D=25 mm, and the clamping portion 21 with a diameter of 25 mm can be suitable for lenses of various common sizes and shapes, and the structure is neither as compact as that of 15 mm nor as bulky as that of 35 mm.

[0069] Optionally, in some embodiments, D=30 mm, and the clamping portion 21 with a diameter of 30 mm has a wider clamping adjustment range. The clamping portion 21 can adjust the clamping position according to different lens sizes and shapes, which is beneficial to improving the lens processing efficiency and the flexibility of the clamp assembly 1.

[0070] like Figures 1 to 5 The clamping portion 21 shown includes a first clamping edge 211 and a second clamping edge 212 connected to the first clamping edge 211 , wherein a rounded corner is formed between the first clamping edge 211 and the second clamping edge 212 ;

[0071] Furthermore, the setting of the chamfered corners helps to evenly distribute stress during the process of clamping the lens, which is beneficial to reducing stress concentration and avoiding damage or deformation of the clamping portion 21 or the lens due to stress concentration; secondly, the setting of the chamfered corners can increase the contact area between the clamping portion 21 and the lens, thereby improving the stability and reliability of the clamping process.

[0072] Furthermore, the rounded corners are helpful in eliminating the sharp parts of the edge of the clamping portion 21, which is helpful in reducing the scratches or wear that may be caused when the clamping portion 21 contacts the lens; secondly, during operation, the rounded corners of the clamping portion 21 can reduce the risk of injury to the operator due to accidental contact with the sharp edge, which is helpful in improving the safety of the overall operation.

[0073] Furthermore, the rounded corners make the appearance of the clamping portion 21 more rounded and smooth, which is beneficial to improving the overall aesthetics of the device.

[0074] like Figures 1 to 5 The fixture assembly 1 shown is a hollow structure and forms an air flow channel 11, and the air flow channel 11 extends and expands toward the lens;

[0075] Optionally, in some embodiments, the clamp assembly 1 is connected to a vacuum device to vacuum-absorb the lens, and the air flow channel 11 is extended and expanded toward the lens so that the lens surface can be more fully contacted during vacuum adsorption, thereby increasing the effective adsorption area. A larger adsorption area can generate a stronger adsorption force, which is beneficial to ensure that the lens remains stable during processing or testing and is not prone to displacement or falling off.

[0076] Optionally, in some embodiments, the clamp assembly 1 includes a first clamp assembly and a second clamp assembly located on the left and right sides of the lens. The first clamp assembly and the second clamp assembly clamp the lens by mechanical clamping. The air flow channel 11 extends and expands toward the direction of the lens, which is conducive to enhancing air flow, thereby improving the heat dissipation effect and preventing damage to the lens due to excessive temperature during clamping or processing.

[0077] like Figures 1 to 5 The clamp assembly 1 shown is provided with a clamp connector 4 at one end away from the lens, and the clamp connector 4 is connected to the clamp assembly 1 by a pipe thread;

[0078] Specifically, the clamp assembly 1 is connected to the clamp joint 4 so as to be able to move closer to or farther away from the lens.

[0079] Furthermore, the pipe thread connection can provide reliable mechanical fixation, which helps to ensure that the clamp assembly 1 is not easy to loosen during use, and effectively improves the overall stability of the device.

[0080] Furthermore, the pipe thread connection has a strong sealing effect and can effectively prevent gas leakage. When the clamp assembly 1 needs to clamp the lens by vacuum adsorption, the setting of the pipe thread connection is conducive to improving the stability of the device operation.

[0081] Furthermore, the setting of the pipe thread connection makes the installation and disassembly of the clamp assembly 1 easier, thereby allowing users to easily maintain and replace it, which helps to improve maintenance efficiency.

[0082] The implementation method of Example 1 is as follows:

[0083] The invention discloses a clamp for eliminating the pinching of lenses during core extraction, comprising a clamp assembly 1, a clamping mounting portion 3 provided on the clamp assembly 1, a clamping piece 2 for clamping the lens provided on the clamping mounting portion 3, the clamping piece 2 being sleeved on the outer wall of the clamping mounting portion 3 and extending toward the lens, the clamping mounting portion 3 is made of metal, preferably copper, the clamping piece 2 is made of plastic, preferably PEEK, which has high toughness and flexibility, so that the clamping piece can avoid the contact between the sharp edge of the clamping mounting portion 3 and the lens during the process of clamping and fixing the lens, thereby effectively reducing the risk of pinching the lens, and effectively solving the problem that metal clamps are often used for clamping and fixing the lens during the core extraction process, and the sharp edges and rigidity of the metal material can easily cause scratches on the lens surface during the clamping process, which not only wastes resources but also seriously affects the progress of lens processing. The first direction is the direction of the clamp assembly 1 toward the lens, the length of the clamping mounting portion 3 toward the first direction is L1, and the length of the clamping member 2 toward the first direction is L2. The setting of L2>L1 is conducive to isolating the contact between the clamping mounting portion 3 and the lens, and is conducive to avoiding the contact between the sharp edge of the clamping mounting portion 3 and the lens, thereby effectively reducing the risk of clamping the lens. The second direction is perpendicular to the first direction, and the second direction is the diameter direction of the lens. The height of the clamping mounting portion 3 toward the second direction is H1, and the height of the clamping member 2 toward the second direction is H2. The setting of H2>H1 makes the thicker clamping member 2 have higher structural strength. During the clamping process, the clamping member 2 needs to withstand the reaction force from the lens and the clamp assembly 1 and possible external impacts. The thicker clamping member 2 can better resist these forces, which is conducive to reducing the risk of bending or deformation of the clamping member 2, thereby ensuring the stability and reliability of the clamping. The clamping member 2 is provided with a clamping portion 21 extending obliquely toward the lens. The diameter of the clamping portion 21 is D, D=35mm. The clamping portion 21 with a diameter of 35mm can provide a moderate clamping force, which is neither too strong nor too weak, effectively ensuring the stability of the lens during processing.

[0084] The implementation method of Example 2 is as follows:

[0085] The difference between Example 2 and Example 1 is that the diameter D of the clamping portion 21 is 40 mm. The clamping portion 21 with a diameter of 40 mm can provide a stronger clamping force, so that the clamp assembly 1 can stably clamp large-sized lenses, thereby effectively broadening the application range of the clamp assembly 1.

[0086] The implementation method of Example 3 is as follows:

[0087] The difference between Example 3 and Example 1 is that a clamping portion 21 is provided on the clamping member 2 and extends obliquely toward the lens. The diameter of the clamping portion 21 is D, D=14 mm. The clamping portion 21 with a diameter of 14 mm is suitable for clamping small and delicate lenses, and can more accurately control the clamping position and force, effectively avoiding unnecessary loss or deformation of small lenses.

[0088] The implementation method of Example 4 is as follows:

[0089] The difference between Example 4 and Example 1 is that the clamping member 2 is provided with a clamping portion 21 extending obliquely toward the lens, and the diameter of the clamping portion 21 is D, D=15mm. The clamping portion 21 with a diameter of 15mm is relatively compact in structure and is suitable for use in occasions where space is limited.

[0090] The implementation method of Example 5 is as follows:

[0091] The difference between Example 5 and Example 1 is that a clamping portion 21 is provided on the clamping member 2 and extends obliquely toward the lens. The diameter of the clamping portion 21 is D, D=25 mm. The clamping portion 21 with a diameter of 25 mm can be used for lenses of various common sizes and shapes. The structure is not as compact as that of 15 mm, nor as bulky as that of 35 mm, which is conducive to saving materials.

[0092] The implementation method of Example 6 is as follows:

[0093] The difference between Example 6 and Example 1 is that a clamping portion 21 is provided on the clamping member 2 and extends obliquely toward the lens. The diameter of the clamping portion 21 is D, D=30 mm. The clamping portion 21 with a diameter of 30 mm has a wider clamping adjustment range. The clamping portion 21 can adjust the clamping position according to different lens sizes and shapes, which is beneficial to improving the lens processing efficiency and the flexibility of the clamp assembly 1.

[0094] The above examples are merely used to further illustrate the technical content of the present invention for easier understanding by the reader. However, they do not limit the implementation of the present invention to these examples. Any technical extension or reinvention based on the present invention is protected by the present invention. The scope of protection of the present invention shall be determined by the claims.

Claims

1. A clamp for eliminating the pinching of a cored lens, comprising a clamp assembly (1), characterized in that: The clamp assembly (1) is provided with a clamping mounting portion (3), the clamping mounting portion (3) is provided with a clamping piece (2) for clamping a lens, and the clamping piece (2) is made of a plastic material; The clamping mounting portion (3) is made of copper, and the clamping member (2) is made of PEEK; The clamping member (2) is provided with a clamping portion (21) extending obliquely toward the lens, and the diameter of the clamping portion (21) is D; The clamping portion (21) comprises a first clamping edge (211) and a second clamping edge (212) connected to the first clamping edge (211), wherein a rounded corner is formed between the first clamping edge (211) and the second clamping edge (212).

2. The clamp for eliminating the pinching of coring lenses according to claim 1, characterized in that: The length of the clamping mounting portion (3) in the first direction is L1, and the length of the clamping member (2) in the first direction is L2, where L2>L1.

3. The clamp for eliminating the pinching of coring lenses according to claim 1, characterized in that: The height of the clamping mounting portion (3) in the second direction is H1, and the height of the clamping member (2) in the second direction is H2, where H2>H1.

4. The clamp for eliminating damage caused by core removal of a lens according to claim 1, characterized in that: The diameter D of the clamping portion (21) is greater than 30 mm.

5. The clamp for eliminating damage caused by core removal of a lens according to claim 1, characterized in that: The diameter of the clamping portion (21) is 14 mm ≤ D ≤ 30 mm.

6. The clamp for eliminating damage caused by core removal of a lens according to claim 1, characterized in that: The clamp assembly (1) is a hollow structure and forms an airflow channel (11), wherein the airflow channel (11) extends and expands in the direction of the lens.

7. The clamp for eliminating damage caused by core removal of a lens according to claim 1, characterized in that: The clamp assembly (1) is provided with a clamp joint (4) at one end away from the lens, and the clamp joint (4) is connected to the clamp assembly (1) through a pipe thread.

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