Lens rotating structure and projection device

Abstract

The utility model belongs to the technical field of projection equipment especially relates to a lens rotation structure and projection device. Lens rotation structure includes: first adapter cylinder, has first adapter cavity, first adapter cylinder is provided with the first opening of first adapter cavity intercommunication, second adapter cylinder, has second adapter cavity, second adapter cylinder is provided with the second opening of second adapter cavity intercommunication, and damping wear -resisting subassembly, including damping layer and wear -resistant layer, wear -resistant layer sliding connection first adapter cylinder, damping layer connects second adapter cylinder, and the end of second adapter cylinder opening second opening inserts first adapter cavity at first opening, damping wear -resistant subassembly is arranged around the circumference of first adapter cylinder or second adapter cylinder multiple. The utility model through the elastic deformation of damping layer, can make first adapter cylinder and second adapter cylinder keep the relative position after rotation, thereby make the pattern that pattern piece projects required angle, has improved the convenience and reliability that lens rotation structure uses.

Description

Technical Field

[0001] This utility model belongs to the field of projection equipment technology, and in particular relates to a lens rotation structure and projection device. Background Technology

[0002] Currently, in the fields of stage lighting and special effects lighting for photography and videography, the lenses equipped with lighting fixtures are mainly divided into two categories: fixed-focus lenses and zoom lenses. Fixed-focus lenses can only complete the projection of images at a fixed angle, which has certain functional limitations; while zoom lenses can effectively make up for this deficiency, as they can achieve zoom adjustment at different magnifications.

[0003] Variable focus stage lights can flexibly adjust the beam projection angle and range to meet diverse stage performance and visual effect needs. By rotating the pattern piece relative to the lens collimation group, the variable focus lens achieves continuous or segmented changes in the beam angle, thereby projecting pattern pieces at different angles.

[0004] However, after prolonged use, the gaps between the components of existing zoom lenses increase. When the adapter tube with the patterned image is rotated into place, it is easy for it to loosen relative to the base connected to the light source. This results in the angle of the projected image not meeting the actual needs, making it inconvenient and unreliable to use. Utility Model Content

[0005] The purpose of this application is to provide a lens rotation structure, which aims to solve the problem of how to improve the reliability of the projection device.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] Firstly, a lens rotation structure is provided, comprising:

[0008] The first adapter tube has a first adapter cavity, and the first adapter tube has a first opening that communicates with the first adapter cavity;

[0009] The second adapter tube has a second adapter cavity, and the second adapter tube has a second opening communicating with the second adapter cavity; and

[0010] A damping and wear-resistant component includes a damping layer made of an elastic material and a wear-resistant layer made of a wear-resistant material and connected to the damping layer;

[0011] Wherein, one end of the second adapter tube with the second opening is inserted into the first adapter cavity at the first opening, and the second opening is located inside the second adapter cavity; the damping wear-resistant component is located between the inner wall of the first adapter cavity and the side surface of the second adapter tube; the wear-resistant layer is slidably connected to the first adapter tube, and the damping layer is connected to the second adapter tube; multiple damping wear-resistant components are arranged circumferentially around the first adapter tube or the second adapter tube.

[0012] In some embodiments, each of the damping layers is integrally formed to form a first damping ring, and each of the wear-resistant layers is arranged circumferentially around the first damping ring; or each of the wear-resistant layers is integrally formed to form a first wear-resistant ring, and each of the damping layers is arranged circumferentially around the first wear-resistant ring.

[0013] In some embodiments, each of the damping layers is integrally formed to form a second damping ring, and each of the wear-resistant layers is integrally formed to form a second wear-resistant ring.

[0014] In some embodiments, the thickness of the damping layer is greater than the thickness of the wear-resistant layer.

[0015] In some embodiments, the first adapter cylinder includes a cylinder body having the first adapter cavity and a limiting ring located at one end of the cylinder body, the first opening being disposed on the limiting ring, the limiting ring surrounding each of the wear-resistant layers along the circumference of the second adapter cylinder, and each of the wear-resistant layers slidingly abutting against the limiting ring.

[0016] In some embodiments, the surface of the limiting ring that abuts against the wear-resistant layer is provided with a clearance groove, and a plurality of clearance grooves are arranged at circumferential intervals around the limiting ring.

[0017] In some embodiments, the limiting ring includes two limiting half-rings, the two ends of which are respectively joined together to form the limiting ring.

[0018] In some embodiments, a docking strip is protruding at the docking end face of one of the limiting half-rings, and a docking groove is formed at the corresponding docking end face of the other limiting half-ring, and the docking strip is inserted into the docking groove.

[0019] In some embodiments, the sleeve end of the second adapter cylinder is provided with a positioning groove, the positioning groove is arranged around the circumference of the second adapter cylinder, each of the damping wear-resistant components is located in the positioning groove, the damping layer is connected to the bottom of the positioning groove, and the limiting ring is at least partially located in the positioning groove.

[0020] In a second aspect, a projection device is provided, which includes the lens rotation structure, the projection device further includes a pattern sheet and a light source for projecting light onto the pattern sheet, the pattern sheet being connected to a first adapter tube and the light source being connected to a second adapter tube, or the pattern sheet being connected to the second adapter tube and the light source being connected to the first adapter tube.

[0021] The beneficial effects of this application are as follows: the first adapter cylinder is connected to the light source, the pattern piece is connected to the second adapter cylinder, and the first adapter cavity and the second adapter cavity are connected through the first opening and the second opening. The light from the light source can be projected onto the pattern piece. When the first adapter cylinder and the second adapter cylinder rotate relative to each other, since the damping layer is in an elastic deformation state, it can push the wear-resistant layer against the inner wall of the first adapter cylinder, thereby increasing the friction between the wear-resistant layer and the first adapter cylinder. During the rotation, there is a damping sensation. After the rotation is in place, the elastic deformation of the damping layer can keep the first adapter cylinder and the second adapter cylinder in their relative positions after rotation, so that the pattern piece can project the pattern at the required angle, thus improving the convenience and reliability of the lens rotation structure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the lens rotation structure provided in the embodiments of this application;

[0024] Figure 2 yes Figure 1 A cross-sectional schematic diagram of the lens rotation structure;

[0025] Figure 3 yes Figure 2 A magnified view of a portion at point A;

[0026] Figure 4 This is a schematic diagram illustrating the structural principle of the damping layer and wear-resistant layer provided in another embodiment of this application;

[0027] Figure 5 This is a schematic diagram illustrating the structural principle of the damping layer and wear-resistant layer provided in another embodiment of this application;

[0028] Figure 6 yes Figure 1 An exploded diagram of the lens rotation structure;

[0029] Figure 7 yes Figure 6 Further explosion diagram;

[0030] Figure 8 yes Figure 7 A schematic diagram of the three-dimensional structure of the limiting semi-ring.

[0031] The following are the labeling elements in the figure:

[0032] 100. Lens rotation structure; 10. First adapter cylinder; 20. Second adapter cylinder; 30. Damping wear-resistant component; 31. Damping layer; 32. Wear-resistant layer; 40. Patterned piece; 31'. Second damping ring; 32'. Second wear-resistant ring; 11. First adapter cavity; 111. First opening; 22. Second adapter cavity; 222. Second opening; 12. Cylinder body; 13. Limiting ring; 23. Clearance groove; 50. Lens; 131. Limiting half ring; 1311. Docking strip; 1312. Docking groove; 1313. Clearance groove; 311. First damping ring; 321. First wear-resistant ring; 21. Positioning groove. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are for ease of description only, not to 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 application. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. 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 technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0035] Please see Figures 1 to 3 This application provides a lens rotation structure 100 and a projection device having the same.

[0036] Please see Figures 1 to 3 The lens rotation structure 100 includes: a first adapter cylinder 10, a second adapter cylinder 20, and a damping and wear-resistant component 30.

[0037] Please see Figures 1 to 3The first adapter tube 10 has a first adapter cavity 11, and the first adapter tube 10 has a first opening 111 communicating with the first adapter cavity 11. The first adapter tube 10 is cylindrical or frustum-shaped, and the first opening 111 is located at the end face of one end of the first adapter tube 10. The shape of the first opening 111 is circular. It can be understood that the first adapter tube 10 has a first opening 111 at both opposite ends.

[0038] Understandably, the second adapter cylinder 20 also typically has a second adapter cavity 22, and the second adapter cylinder 20 has a second opening 222 communicating with the second adapter cavity 22. The second adapter cylinder 20 is cylindrical or frustum-shaped, and the second opening 222 is located at one end face of the second adapter cylinder 20, and the shape of the second opening 222 is circular. Understandably, the second adapter cylinder 20 has a second opening 222 at both opposite ends.

[0039] The damping and wear-resistant component 30 includes a damping layer 31 made of an elastic material and a wear-resistant layer 32 made of a wear-resistant material and connected to the damping layer 31. The damping layer 31 made of elastic material can undergo elastic deformation when compressed, and can return to its original shape after the pressure is removed. The wear-resistant layer 32 made of wear-resistant material can resist friction between relative sliding.

[0040] Please see Figures 1 to 3 The first adapter tube 10 passes through the first opening 111 and is fitted onto the second opening 222 of the second adapter tube 20. That is, the end of the second adapter tube 20 with the second opening 222 is inserted into the first adapter cavity 11 at the first opening 111, and the second opening 222 is located inside the second adapter cavity 22. The first adapter cavity 11 and the second adapter cavity 22 are connected through the second opening 222, and the first adapter tube 10 and the second adapter tube 20 can rotate relative to each other.

[0041] The damping wear-resistant component 30 is located between the inner wall of the first adapter cavity 11 and the side surface of the second adapter cylinder 20; the wear-resistant layer 32 is slidably connected to the first adapter cylinder 10, and the damping layer 31 is connected to the second adapter cylinder 20. It is understood that the damping layer 31 can be glued to the side surface of the second adapter cylinder 20 or directly attached to it. Because the damping layer 31, due to its relatively rough surface, generates a relatively large static friction force when the first adapter cylinder 10 and the second adapter cylinder 20 rotate relative to each other, it will not slide relative to the second adapter cylinder 20. The wear-resistant layer 32, being made of a hard material, has a relatively smooth surface, resulting in a relatively low sliding friction force between it and the inner wall of the first adapter cylinder 10, thus allowing manual rotation of the first adapter cylinder 10 and the second adapter cylinder 20 relative to each other. Multiple damping wear-resistant components 30 are arranged circumferentially around the first adapter cylinder 10 or the second adapter cylinder 20.

[0042] Please see Figures 1 to 3When the first adapter cylinder 10 is sleeved over one end of the second adapter cylinder 20, the first adapter cylinder 10 and the second adapter cylinder 20 are similar to an interference fit, causing the inner wall of the first adapter cylinder 10 to press the wear-resistant layer 32 against the second adapter cylinder 20, thereby driving the damping layer 31 into an elastic deformation state. The damping layer 31, in turn, pushes the wear-resistant layer 32 against the first adapter cylinder 10, thereby increasing the friction between the wear-resistant layer 32 and the inner wall of the first adapter cylinder 10. When the first adapter cylinder 10 rotates relative to the second adapter cylinder 20, it can generate a damping sensation and can make small angle adjustments. After adjustment, the damping layer 31 in an elastic state can increase the static friction between the wear-resistant layer 32 and the inner wall of the first adapter cylinder 10, thereby keeping the relative position of the first adapter cylinder 10 and the second adapter cylinder 20 stable. Moreover, the material of the wear-resistant layer 32 can resist the need for frequent rotation and adjustment, reduce wear between parts, and improve service life.

[0043] The lens rotation structure 100 can be used in conjunction with the pattern sheet 40 and the light source. For example, the pattern sheet 40 can be placed in the first adapter cavity 11, and the light source can be placed in the second adapter cavity 22. The light source projects light onto the pattern sheet 40, thereby projecting the pattern on the pattern sheet 40 onto the ground or other structural components. Of course, the pattern sheet 40 can also be placed in the second adapter cavity 22, and the light source can be placed in the first adapter cavity 11. There is no limitation here, and the choice can be made according to the actual situation.

[0044] Please see Figures 1 to 3 The lens rotation structure 100 provided in this application embodiment can connect the first adapter cylinder 10 to the light source and the pattern piece 40 to the second adapter cylinder 20. The first adapter cavity 11 and the second rotating cavity cylinder are connected through the first opening 111 and the second opening 222. The light from the light source can be projected onto the pattern piece 40. When the first adapter cylinder 10 and the second adapter cylinder 20 rotate relative to each other, the damping layer 31 is in an elastic deformation state, which can push the wear-resistant layer 32 against the inner wall of the first adapter cylinder 10, thereby increasing the friction between the wear-resistant layer 32 and the first adapter cylinder 10. During the rotation, there is a damping sensation. After the rotation is in place, the elastic deformation of the damping layer 31 can keep the first adapter cylinder 10 and the second adapter cylinder 20 in their relative positions after rotation, so that the pattern piece 40 can project the pattern at the required angle, thus improving the convenience and reliability of the lens rotation structure 100.

[0045] Understandably, since the rotation adjustment between the first adapter cylinder 10 and the second adapter cylinder 20 is stepless, the damping layer 31 makes the stepless adjustment process have a damping feel. According to the required adjustment angle, the operator can fine-tune or fine-tune the rotation angle of the first adapter cylinder 10 and the second adapter cylinder 20, thereby improving the accuracy of the angle adjustment.

[0046] Understandably, the material of the damping layer 31 can be silicone, soft rubber, or damping paper.

[0047] Optionally, the thickness of the damping layer 31 ranges from 1 to 2 mm.

[0048] Alternatively, the wear-resistant layer 32 may be made of Teflon or other modified materials.

[0049] Optionally, the thickness of the wear-resistant layer 32 ranges from 1 to 2 mm.

[0050] Please see Figure 4 In some embodiments, each damping layer 31 is integrally formed to form a first damping ring 311, and each wear-resistant layer 32 is arranged circumferentially around the first damping ring 311.

[0051] Optionally, the first damping ring 311 is fitted onto one end of the second adapter cylinder 20 through elastic deformation. Each damping layer 31 is integrally formed into the first damping ring 311, which improves assembly convenience and efficiency. Furthermore, the integrally formed first damping ring 311 can provide stable pushing force through uniform elastic deformation, ensuring sliding contact between each wear-resistant layer 32 and the first adapter cylinder 10, reducing localized wear or uneven damping. It also increases the contact area between the first damping ring 311 and the second adapter cylinder 20, allowing the first damping ring 311 to fit over the second adapter cylinder 20 solely through its own elastic deformation.

[0052] The spaced wear-resistant layers 32 can reduce the contact area between the damping wear-resistant component 30 and the first adapter cylinder 10, reduce the wear of the first adapter cylinder 10, and also reduce the driving force required for relative rotation between the first adapter cylinder 10 and the second adapter cylinder 20.

[0053] Please see Figure 5 In some embodiments, each wear-resistant layer 32 is integrally formed to form a first wear-resistant ring 321, and each damping layer 31 is arranged circumferentially around the first wear-resistant ring 321.

[0054] Optionally, the integral molding of each wear-resistant layer 32 into a first wear-resistant ring 321 can improve the assembly efficiency and convenience of each wear-resistant layer 32. The damping layer 31 is arranged at equal intervals around the first wear-resistant ring 321 in the circumferential direction, which enhances the stability of rotation between the wear-resistant layer 32 and the first adapter cylinder 10. The integrally molded first wear-resistant ring 321 can increase its contact area with the first adapter cylinder 10, thereby increasing the friction between the two. After the first adapter cylinder 10 and the second adapter cylinder 20 have rotated to their relative positions, they can maintain their relative rotation positions.

[0055] Please see Figures 6 to 8 In some embodiments, each damping layer 31 is integrally formed to form a second damping ring 31', and each wear-resistant layer 32 is integrally formed to form a second wear-resistant ring 32'.

[0056] Optionally, the second wear-resistant ring 32' is sleeved on the second damping ring 31', and the second damping ring 31' is sleeved on the second adapter cylinder 20. The second damping ring 31' can apply a uniform elastic thrust, and the second wear-resistant ring 32' can provide a continuous wear-resistant surface, ensuring that the first adapter cylinder 10 and the second adapter cylinder 20 maintain a stable damping feel and low friction contact when rotating. This reduces the problem of increased gap caused by wear of parts due to long-term use, improves the uniformity and durability of damping rotation, and improves the assembly efficiency and ease of assembly of the damping wear-resistant assembly 30.

[0057] Please see Figures 6 to 8 In some embodiments, the thickness of the damping layer 31 is greater than the thickness of the wear-resistant layer 32. For example, the thickness of the wear-resistant layer 32 ranges from 1 to 1.5 mm, and the thickness of the damping layer 31 ranges from 1.5 to 2 mm.

[0058] Optionally, the thickness of the damping layer 31 is greater than the thickness of the wear-resistant layer 32, which optimizes the balance between the damping effect and durability of the damping and wear-resistant component 30, and improves the rotational stability and service life of the lens rotation structure 100. By rationally allocating damping and wear-resistant functions, the stability and accuracy of the projection device are improved, and its service life is extended.

[0059] Please see Figures 6 to 8 In some embodiments, the first adapter cylinder 10 includes a cylinder body 12 having a first adapter cavity 11 and a limiting ring 13 located at one end of the cylinder body 12. A first opening 111 is provided on the limiting ring 13. The limiting ring 13 surrounds each wear-resistant layer 32 along the circumference of the second adapter cylinder 20, and each wear-resistant layer 32 slides against the limiting ring 13.

[0060] Optionally, the limiting ring 13 is annular and sleeved on the outer surface of the second adapter cylinder 20, and each wear-resistant layer 32 slides against the inner ring side of the limiting ring 13, thereby improving the rotational positioning accuracy and structural stability of the first adapter cylinder 10 and the second adapter cylinder 20, and ensuring the effectiveness of the damping wear-resistant component 30.

[0061] Please see Figures 6 to 8 In some embodiments, the surface of the limiting ring 13 that abuts against the wear-resistant layer 32 is provided with a clearance groove 1313, and multiple clearance grooves 1313 are arranged circumferentially around the limiting ring 13.

[0062] Optionally, the clearance groove 1313 can reduce the contact area between the limiting ring 13 and the wear-resistant layer 32, that is, reduce the wear of the limiting ring 13 and the wear-resistant ring, and also reduce the sliding friction between the limiting ring 13 and the wear-resistant ring, so that the first adapter cylinder 10 can rotate smoothly relative to the second adapter cylinder 20, while retaining the elastic pushing effect of the damping layer 31, ensuring that there is a damping feeling during the rotation process and improving the user experience.

[0063] Please see Figures 6 to 8 In some embodiments, the limiting ring 13 includes two limiting half-rings 131, with the two ends of the two limiting half-rings 131 respectively docked to form the limiting ring 13.

[0064] Optionally, the two limiting semi-rings 131 have the same bending angle. By joining the two limiting semi-rings 131, a circular limiting ring 13 can be formed. By setting the limiting ring 13 as the joint of two limiting semi-rings 131, this split design facilitates the installation and disassembly of the limiting ring 13. This reduces the assembly difficulty and facilitates the disassembly and replacement of the damping wear-resistant component 30.

[0065] Please see Figures 6 to 8 In some embodiments, one of the limiting semi-rings 131 has a protruding mating strip 1311 on its mating end face, and the other limiting semi-ring 131 has a mating groove 1312 on its corresponding mating end face, with the mating strip 1311 engaging with the mating groove 1312. It is understood that each limiting semi-ring 131 has an clearance groove 1313. One end face of any limiting semi-ring 131 has a mating groove 1312, and the other end face has a protruding mating strip 1311.

[0066] Optionally, the cooperation between the mating bar 1311 and the mating groove 1312 improves the mating accuracy and structural stability of the two limiting half-rings 131 during assembly. The cooperation between the mating bar 1311 and the mating groove 1312 ensures a seamless connection between the two limiting half-rings 131, preventing gaps from forming at the mating point due to force or vibration, and enhancing the radial constraint effect of the limiting ring 13 on the second adapter cylinder 20.

[0067] Please see Figures 6 to 8 In some embodiments, the sleeve end of the second adapter cylinder 20 is provided with a positioning groove 21, the positioning groove 21 is arranged around the circumference of the second adapter cylinder 20, each damping wear-resistant component 30 is located in the positioning groove 21, the damping layer 31 is connected to the bottom of the positioning groove 21, and the limiting ring 13 is at least partially located in the positioning groove 21.

[0068] Optionally, by opening the positioning groove 21, both the damping ring and the wear-resistant ring can be installed in the positioning groove 21, which improves the stability of the damping ring and the wear-resistant ring, and allows the damping ring to undergo appropriate elastic deformation and be sleeved on the bottom of the positioning groove 21.

[0069] The limiting ring 13 is at least partially located within the positioning groove 21, thereby preventing the first adapter cylinder 10 and the second adapter cylinder 20 from separating axially. The annular surface of the limiting ring 13 abuts against the groove wall of the positioning groove 21, which provides axial limiting for the limiting ring 13. This ultimately improves the reliability of the damping ring and the wear-resistant ring installation and the uniformity of rotational damping, reducing the risk of loosening due to assembly deviations.

[0070] Please see Figures 6 to 8 This utility model also proposes a projection device, which includes a lens rotation structure 100. The specific structure of the lens rotation structure 100 is as described in the above embodiments. Since this projection device adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0071] Please see Figures 1 to 3 In some embodiments, the projection device further includes a pattern sheet 40 and a light source for projecting light onto the pattern sheet 40.

[0072] Optionally, the patterned piece 40 is connected to the first adapter tube 10, the light source is connected to the second adapter tube 20, and multiple lenses are also arranged at intervals in the second adapter cavity 22.

[0073] Please see Figures 1 to 3 Optionally, the pattern piece 40 is connected to the second adapter tube 20, the light source is connected to the first adapter tube 10, and the projection device also includes a lens 50 connected to the second adapter tube 20. The second adapter tube 20 has a relief groove 23 that communicates with the second adapter cavity 22. The pattern piece 40 is inserted into the adapter cavity through the relief groove 23, and the light emitted by the light source is projected onto the pattern piece 40 through the second adapter cavity 22.

[0074] Optionally, multiple clearance slots 23 are arranged at intervals, and each clearance slot 23 is filled with a patterned piece 40.

[0075] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A lens rotation structure (100), characterized in that, include: The first adapter tube (10) has a first adapter cavity (11) and the first adapter tube (10) has a first opening (111) that communicates with the first adapter cavity (11); The second adapter tube (20) has a second adapter cavity (22), and the second adapter tube (20) has a second opening (222) communicating with the second adapter cavity (22); and The damping wear-resistant component (30) includes a damping layer (31) made of an elastic material and a wear-resistant layer (32) made of a wear-resistant material and connected to the damping layer (31); Wherein, the second adapter cylinder (20) with the second opening (222) at one end is inserted into the first adapter cavity (11) at the first opening (111), and the second opening (222) is located inside the second adapter cavity (22). The damping wear-resistant component (30) is located between the inner wall of the first adapter cavity (11) and the side surface of the second adapter cylinder (20). The wear-resistant layer (32) is slidably connected to the first adapter cylinder (10), and the damping layer (31) is connected to the second adapter cylinder (20). Multiple damping wear-resistant components (30) are arranged circumferentially around the first adapter cylinder (10) or the second adapter cylinder (20).

2. The lens rotation structure (100) as described in claim 1, characterized in that: Each of the damping layers (31) is integrally formed to form a first damping ring (311), and each of the wear-resistant layers (32) is arranged circumferentially around the first damping ring (311), or each of the wear-resistant layers (32) is integrally formed to form a first wear-resistant ring (321), and each of the damping layers (31) is arranged circumferentially around the first wear-resistant ring (321).

3. The lens rotation structure (100) as described in claim 1, characterized in that: Each of the damping layers (31) is integrally formed to form a second damping ring (31'), and each of the wear-resistant layers (32) is integrally formed to form a second wear-resistant ring (32').

4. The lens rotation structure (100) as described in claim 1, characterized in that: The thickness of the damping layer (31) is greater than the thickness of the wear-resistant layer (32).

5. The lens rotation structure (100) as described in any one of claims 1-4, characterized in that: The first adapter cylinder (10) includes a cylinder body (12) having the first adapter cavity (11) and a limiting ring (13) located at one end of the cylinder body (12). The first opening (111) is provided on the limiting ring (13). The limiting ring (13) surrounds each of the wear-resistant layers (32) along the circumference of the second adapter cylinder (20), and each of the wear-resistant layers (32) slides against the limiting ring (13).

6. The lens rotation structure (100) as described in claim 5, characterized in that: The limiting ring (13) has a clearance groove (1313) on the surface of the wear-resistant layer (32) that abuts against it. Multiple clearance grooves (1313) are arranged at intervals around the circumference of the limiting ring (13).

7. The lens rotation structure (100) as described in claim 5, characterized in that: The limiting ring (13) includes two limiting half-rings (131), and the two ends of the two limiting half-rings (131) are respectively connected to form the limiting ring (13).

8. The lens rotation structure (100) as described in claim 7, characterized in that: One of the limiting half-rings (131) has a protruding docking strip (1311) on its docking end face, and the other limiting half-ring (131) has a docking groove (1312) on its corresponding docking end face, and the docking strip (1311) is inserted into the docking groove (1312).

9. The lens rotation structure (100) as described in claim 5, characterized in that: The second adapter tube (20) has a positioning groove (21) at its sleeve end. The positioning groove (21) is arranged around the second adapter tube (20) in the circumference. Each of the damping wear-resistant components (30) is located in the positioning groove (21). The damping layer (31) is connected to the bottom of the positioning groove (21). The limiting ring (13) is at least partially located in the positioning groove (21).

10. A projection device, characterized in that, Including the lens rotation structure (100) as described in any one of claims 1-9, the projection device further includes a pattern sheet (40) and a light source for projecting light onto the pattern sheet (40), wherein the pattern sheet (40) is connected to the first adapter tube (10) and the light source is connected to the second adapter tube (20), or the pattern sheet (40) is connected to the second adapter tube (20) and the light source is connected to the first adapter tube (10).

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