Spherical pair and large-aperture reflector bracket system
By using a spherical mating connection and spring design, the problems of installation, adjustment and fixation of large-aperture reflective lenses are solved, achieving stable support and angle adjustment, and meeting the special requirements of large-aperture reflective lenses.
Patent Information
- Application Number
- CN202511424815.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2025-11-25
AI Technical Summary
Existing technologies are insufficient to meet the special requirements of large-aperture reflective lenses in terms of installation, adjustment and fixation, especially the issues of load-bearing rigidity and stability caused by increased weight, and the difficulty of achieving fine-tuning of angles with traditional adjustment mechanisms.
The design employs a spherical pair, where the connecting rod and the fixing block are spherically fitted together and kept close to each other by a first spring. Combined with the distance between the outer flange of the spherical surface and the connecting plate, it enables support and angle adjustment for large-diameter reflective lenses.
It achieves stable support and angle adjustment for large-diameter reflective mirrors, meets special requirements for installation, adjustment and fixation, and improves the load-bearing rigidity and stability of the reflector frame.
Smart Images
Figure CN121008375A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of optical mirror frame technology, and in particular to a spherical pair and large-aperture reflective mirror frame system. Background Technology
[0002] The mirror mount is a core component in an optical system used to fix and adjust the reflecting mirrors, controlling the light path by adjusting the angle of the reflecting mirrors. The technology for standard-sized mirror mounts is relatively mature.
[0003] However, when the diameter of the reflecting mirror is greater than 300mm (referred to as a large-aperture reflecting mirror), the design of its reflecting mirror frame faces enormous challenges: First, the weight of the reflecting mirror increases significantly, requiring the reflecting mirror frame to have higher load-bearing rigidity and stability to avoid deformation; second, the installation and clamping of large-aperture reflecting mirrors are prone to deformation due to uneven force, affecting optical accuracy; finally, traditional adjustment mechanisms are difficult to achieve fine-tuning of the angle while supporting heavy loads.
[0004] Therefore, existing technologies are insufficient to meet the special requirements of large-aperture reflective lenses in terms of installation, adjustment, and fixation, and a new solution is urgently needed. Summary of the Invention
[0005] The purpose of this invention is to provide a spherical pair and a large-aperture reflector mount system to solve the problems existing in the prior art. The connecting rod and the fixing block can be spherically fitted together and kept close to each other by a first spring. At the same time, by utilizing the distance between the outer flange of the spherical surface and the connecting plate, a certain gap can appear between the spherical surfaces of the connecting rod and the fixing block, so as to both support the large-aperture reflector and accommodate a certain degree of misalignment during the angle adjustment process.
[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides a spherical assembly, including a connecting rod, a fixing block, and a first spring. The first end of the connecting rod is connected to a bracket, and the second end of the connecting rod has a spherical outer flange, the spherical surface of which faces the first end of the connecting rod. The fixing block has a through cavity, the first end of which has a spherical inner flange, the spherical surface of which faces the second end of the through cavity. The inner flange and the outer flange are fitted together. The second end of the through cavity has a connecting plate for connecting to a reflecting lens. The first spring is disposed in the through cavity, the first end of which abuts against the outer flange, and the second end of which abuts against the connecting plate. There is a gap between the outer flange and the connecting plate.
[0007] In one embodiment, the spherical outer flange is provided with an annular groove, the connecting plate is provided with an annular protrusion, the first end of the first spring is located inside the annular groove, and the second end of the first spring is located inside the annular protrusion.
[0008] In one embodiment, the connecting plate is provided with a U-shaped groove, the opening width of which is greater than or equal to the thickness of the reflective lens, and the U-shaped groove is used to hold the reflective lens.
[0009] The present invention provides a large-aperture reflector mount system, including a base, a bracket, and a spherical plate as described above, wherein the bracket is mounted on the base; the connecting rod is adjustable to be connected to the bracket, and the connecting plate is used to connect to the reflector.
[0010] In one embodiment, a support rod is also included. The bracket is provided with a first threaded hole. A first end of the support rod is threaded into the first threaded hole, and a second end of the support rod is connected to the connecting rod.
[0011] In one embodiment, three first threaded holes are provided, and the three first threaded holes are distributed in an equilateral triangle on the bracket, wherein two of the first threaded holes are distributed in the horizontal direction.
[0012] In one embodiment, a first locking nut is further included, which is threaded to a first end of the support rod and is located on the side of the bracket away from the reflective lens.
[0013] In one embodiment, a Y-axis sliding pair is further included. The Y-axis sliding pair includes a Y-axis slider and a Y-axis adjusting mechanism. The Y-axis slider is slidably connected to the base. The Y-axis adjusting mechanism includes a Y-axis support, a Y-axis bolt, and a second spring. The Y-axis support is connected to the base and has a first through hole. The Y-axis slider has a second threaded hole. The Y-axis bolt passes through the first through hole and is threaded to the second threaded hole. The second spring is sleeved on the outer diameter side of the Y-axis bolt and is located between the Y-axis support and the Y-axis slider.
[0014] In one embodiment, an X-axis sliding pair is further included. The X-axis sliding pair includes an X-axis slider and an X-axis adjusting mechanism. The X-axis slider is slidably connected to the Y-axis slider. The X-axis adjusting mechanism includes an X-axis support, an X-axis bolt, and a third spring. The X-axis support is connected to the Y-axis slider. The X-axis support is provided with a second through hole. The X-axis slider is provided with a third threaded hole. The X-axis bolt passes through the second through hole and is threadedly connected to the third threaded hole. The third spring is sleeved on the outer diameter side of the X-axis bolt and is located between the X-axis support and the X-axis slider.
[0015] In one embodiment, the Y-axis adjustment mechanism further includes a second locking nut, which is threadedly connected to the Y-axis bolt. The first end of the second spring abuts against the Y-axis support, and the second end of the second spring abuts against the second locking nut. The X-axis adjustment mechanism further includes a third locking nut, which is threadedly connected to the X-axis slider. The first end of the third spring abuts against the X-axis support, and the second end of the third spring abuts against the third locking nut.
[0016] The present invention achieves the following technical effects compared to the prior art: The present invention allows for a spherical fit between the connecting rod and the fixing block, and utilizes a first spring to keep the connecting rod and the fixing block close to each other. That is, after adjustment, the connecting rod and the fixing block are relatively stable. At the same time, the distance between the outer flange of the spherical surface and the connecting plate allows for a certain gap between the spherical surfaces of the connecting rod and the fixing block. This means that during adjustment, it is not necessary to maintain spherical contact between the outer flange and the inner flange of the spherical surface. Thus, it can both support the large-aperture reflective lens and accommodate a certain degree of misalignment during angle adjustment, meeting the special requirements of large-aperture reflective lenses in terms of installation, adjustment, and fixation. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the large-aperture reflector frame system in an embodiment of the present invention; Figure 2 This is a front view of the large-aperture mirror frame system in an embodiment of the present invention; Figure 3 This is a top view of the large-aperture mirror frame system in an embodiment of the present invention; Figure 4 This is a vertical cross-sectional schematic diagram of the large-aperture reflector frame system in an embodiment of the present invention; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 for Figure 4 Enlarged view at point B in the middle; Figure 7 for Figure 4 Enlarged view at point C; Figure 8This is a schematic diagram of the spherical secondary explosion structure in an embodiment of the present invention; Figure 9 This is a schematic diagram of the Y-axis adjustment mechanism in an embodiment of the present invention; Figure 10 This is a schematic diagram of the X-axis adjustment mechanism in an embodiment of the present invention; The components include: 1. base; 2. bracket; 3. spherical joint; 4. Y-axis sliding joint; 5. X-axis sliding joint; 6. support rod; 7. first locking nut; and 8. reflective lens. 31. Connecting rod; 32. Fixing block; 33. First spring; 34. Connecting plate; 311. Spherical outer flange; 321. Spherical inner flange; 41. Y-axis slider; 42. Y-axis adjustment mechanism; 421. Y-direction bolt; 422. Y-direction support; 423. Second spring; 424. Second lock nut; 51. X-axis slider; 52. X-axis adjustment mechanism; 511. Third threaded hole; 521. X-direction bolt; 522. X-direction support; 523. Third spring; 524. Third lock nut. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] The purpose of this invention is to provide a spherical pair and a large-aperture reflector mount system to solve the problems existing in the prior art. The connecting rod and the fixing block can be spherically fitted together and kept close to each other by a first spring. At the same time, by utilizing the distance between the outer flange of the spherical surface and the connecting plate, a certain gap can appear between the spherical surfaces of the connecting rod and the fixing block, so as to both support the large-aperture reflector and accommodate a certain degree of misalignment during the angle adjustment process.
[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0022] like Figures 1-10As shown, the present invention provides a spherical joint, including a connecting rod 31, a fixing block 32, and a first spring 33. The first end of the connecting rod 31 is connected to a bracket 2, i.e., the bracket 2 supports the first end of the connecting rod 31. The second end of the connecting rod 31 is provided with a spherical outer flange 311, which has a first spherical surface facing the first end of the connecting rod 31. The fixing block 32 has a through cavity, the first end of which is provided with a spherical inner flange 321, which has a second spherical surface facing the second end of the through cavity. That is, the first and second spherical surfaces face opposite directions and have the same curvature. The spherical inner flange 321 and the spherical outer flange 311 can fit together, thereby enabling relative rotation or oscillation of the connecting rod 31 and the fixing block 32. The second end of the through cavity is provided with a connecting plate 34, which is used to connect to a reflecting lens 8. The connection can be made by clamping, supporting, or other methods. A first spring 33 is disposed in the through cavity. The first end of the first spring 33 abuts against the outer spherical flange 311, and the second end of the first spring 33 abuts against the connecting plate 34. There is a gap between the outer spherical flange 311 and the connecting plate 34. Under the action of the first spring 33, the first spherical surface of the outer spherical flange 311 is in close contact with the second spherical surface of the inner spherical flange 321. However, due to the gap between the outer spherical flange 311 and the connecting plate 34, in some cases, the first spherical surface of the outer spherical flange 311 may partially disengage from the second spherical surface of the inner spherical flange 321, and maintain relative stability under the action of the first spring 33.
[0023] The connecting rod 31 and the fixing block 32 of this invention can be spherically fitted together, and the first spring 33 keeps the connecting rod 31 and the fixing block 32 close to each other. That is, after adjustment, the connecting rod 31 and the fixing block 32 are relatively stable. At the same time, the distance between the outer spherical flange 311 and the connecting plate 34 allows a certain gap to appear between the spherical surfaces of the connecting rod 31 and the fixing block 32. That is, it is not necessary to keep the spherical outer flange 311 and the inner spherical flange 321 in spherical contact during the adjustment process. Thus, it can both support the large-aperture reflective lens 8 and accommodate a certain degree of misalignment during the angle adjustment process, thus meeting the special requirements of the large-aperture reflective lens 8 in terms of installation, adjustment and fixation.
[0024] In one embodiment, combined with Figure 5 and Figure 8As shown, the outer spherical flange 311 is provided with an annular groove, and the connecting plate 34 is provided with an annular protrusion. The annular groove and the annular protrusion are arranged opposite to each other. The first end of the first spring 33 is located inside the annular groove, and the second end of the first spring 33 is located inside the annular protrusion. The annular groove and the annular protrusion form a limit on the first spring 33. When the connecting rod 31 rotates or swings relative to the fixed block 32, even if the first spring 33 is bent by force, the first spring 33 is always restricted in the annular groove and the annular protrusion, so that the first spring 33 provides elastic force for the outer spherical flange 311 to approach the inner spherical flange 321.
[0025] In one implementation, such as Figure 4 and Figure 8 As shown, the connecting plate 34 is provided with a U-shaped groove. The opening width of the U-shaped groove is greater than or equal to the thickness of the reflective lens 8, so that the reflective lens 8 can be inserted into the U-shaped groove. Multiple connecting plates 34 are engaged at different circumferential positions of the reflective lens 8, thereby achieving stable support for the reflective lens 8.
[0026] like Figures 1-10 As shown, this invention provides a large-aperture reflector mount system, including a base 1, a support 2, and a spherical mount 3 as described above. The support 2 is mounted on the base 1, directly or indirectly connected to the base 1. The support 2 has sufficient height, greater than the diameter of the reflector 8, thereby enabling vertical mounting of the reflector 8 and allowing adjustment of its pitch and deflection angles. The base 1 is used to place on the ground or a table. The base 1 has a high counterweight relative to the reflector 8, ensuring the stability of the entire large-aperture reflector mount system after the reflector 8 is installed. A connecting rod 31 is adjustable in distance from the support 2; for example, a telescopic rod is provided, and the distance between the connecting rod 31 and the support 2 can be changed by extending or retracting the telescopic rod. A connecting plate 34 is used to connect to the reflector 8. The connecting plate 34 may be provided with a U-shaped groove for holding the reflector 8, or other clamping structures.
[0027] The present invention allows the connecting rod 31 of the spherical pair 3 to be connected to the bracket 2 in an adjustable manner, thereby adjusting the distance between the spherical pair 3 and the bracket 2 at different positions, which in turn changes the deflection angle or pitch angle of the reflective lens 8. Therefore, the distance between the spherical pair 3 and the bracket 2 can be adjusted according to the required angle.
[0028] In one implementation, such as Figure 1 and Figure 7As shown, it also includes a support rod 6. The bracket 2 is provided with a first threaded hole. The support rod 6 is threaded at least at its first end and near the first end, or threaded along its entire length. The first end of the support rod 6 is threaded into the first threaded hole. The second end of the support rod 6 is connected to a connecting rod 31. During connection, the connecting rod 31 can be welded to the support rod 6, or the connecting rod 31 can be threaded into the threaded hole of the support rod 6. When the support rod 6 is rotated, it can move axially relative to the bracket 2, thereby adjusting the distance between the connecting rod 31 and the bracket 2, i.e., adjusting the distance between the reflecting lens 8 connected to the spherical pair 3 and the bracket 2. Based on the spherical connection relationship between the connecting rod 31 and the fixing block 32, when the support rod 6 is rotated, causing the connecting rod 31 to rotate, the connecting rod 31 and the fixing block 32 can rotate relative to each other without causing jamming or interference, thus smoothly completing the adjustment of the axial length of the support rod 6.
[0029] In one implementation, such as Figure 1 and Figure 2 As shown, the bracket 2 includes a support plate and a reinforcing rib. The support plate is vertically connected to the base 1, and the reinforcing rib is connected perpendicularly to the support plate to enhance the vertical stability of the support plate. Three first threaded holes are provided on the support plate, arranged in an equilateral triangle on the bracket 2, meaning the distance between any two adjacent first threaded holes is equal. Two of the first threaded holes are horizontally distributed, i.e., the base of the equilateral triangle is horizontal. Because the three first threaded holes are arranged in an equilateral triangle, the support rods 6 connected to the first threaded holes are also arranged in an equilateral triangle. This arrangement allows for simpler and more convenient adjustment of the pitch or deflection angle of the reflecting mirror 8 by adjusting only the axial extension length of one or more support rods 6.
[0030] In one implementation, such as Figure 1 and Figure 7 As shown, it also includes a first locking nut 7, which is threadedly connected to the first end of the support rod 6. The first locking nut 7 is located on the side of the bracket 2 away from the reflective lens 8. After the axial extension length of the support rod 6 is adjusted to the correct position, the axial position of the first locking nut 7 on the support rod 6 is rotated so that the first locking nut 7 abuts against the bracket 2. Thus, the first locking nut 7 and the bracket 2 abut against each other, providing axial preload to the support rod 6 and increasing the friction of the thread when the support rod 6 rotates, thereby locking the position of the support rod 6 relative to the bracket 2.
[0031] In one implementation, such as Figures 1-4 , Figure 9As shown, it also includes a Y-axis sliding pair 4, which includes a Y-axis slider 41 and a Y-axis adjusting mechanism 42. The Y-axis slider 41 is slidably connected to the base 1. During connection, it can be guided by the cooperation of a wedge groove and a wedge block, or by the cooperation of a T-slot and a T-block. The former is easier to install because it can be placed vertically directly. The Y-axis adjusting mechanism 42 includes a Y-axis support 422, a Y-axis bolt 421, and a second spring 423. The Y-axis support 422 is connected to the base 1 and can be fastened with screws. The Y-axis support 422 is provided with a first through hole, and the Y-axis slider 41 is provided with a second threaded hole. The Y-axis bolt 421 passes through the first through hole and is threaded into the second threaded hole. The second spring 423 is sleeved on the outer diameter side of the Y-axis bolt 421 and is located between the Y-axis support 422 and the Y-axis slider 41. When the Y-bolt 421 is loosened within the second threaded hole, the distance between the head of the Y-bolt 421 and the Y-slider 41 is increased. At this time, under the action of the second spring 423, the Y-slider 41 is forced to move away from the Y-support 422. When the Y-bolt 421 is tightened within the second threaded hole, the distance between the head of the Y-bolt 421 and the Y-slider 41 is decreased. At this time, under the limiting action of the Y-support 422, the Y-slider 41 is forced to move towards the Y-support 422. This allows for adjustment of the positive and negative Y-direction of the Y-slider 41.
[0032] In one implementation, such as Figures 1-4 , Figure 10As shown, it also includes an X-axis sliding pair 5, which includes an X-axis slider 51 and an X-axis adjusting mechanism 52. The X-axis slider 51 is slidably connected to the Y-axis slider 41. During connection, it can be guided by the cooperation of a wedge groove and a wedge block, or by the cooperation of a T-slot and a T-block. The former is easier to install because it can be placed vertically directly. The X-axis adjusting mechanism 52 includes an X-axis support 522, an X-axis bolt 521, and a third spring 523. The X-axis support 522 is connected to the Y-axis slider 41 and can be fastened with screws. The X-axis support 522 is provided with a second through hole, and the X-axis slider 51 is provided with a third threaded hole 511. The X-axis bolt 521 passes through the second through hole and is threaded into the third threaded hole 511. The third spring 523 is sleeved on the outer diameter side of the X-axis bolt 521 and is located between the X-axis support 522 and the X-axis slider 51. When the X-bolt 521 is rotated to loosen it within the third threaded hole 511, the distance between the head of the X-bolt 521 and the X-slider 51 is increased. At this time, under the action of the third spring 523, the X-slider 51 is forced to move away from the X-support 522. When the X-bolt 521 is rotated to tighten it within the third threaded hole 511, the distance between the head of the X-bolt 521 and the X-slider 51 is decreased. At this time, under the limiting action of the X-support 522, the X-slider 51 is forced to move towards the X-support 522. This allows for adjustment of the positive and negative X-direction of the X-slider 51.
[0033] In one embodiment, combined with Figures 1-4 , Figure 9 and Figure 10As shown, the Y-axis adjustment mechanism 42 also includes a second locking nut 424, which is threadedly connected to the Y-axis bolt 421. The first end of the second spring 423 abuts against the Y-axis support 422, and the second end of the second spring 423 abuts against the second locking nut 424. When the axial extension length of the Y-axis bolt 421 is adjusted to the correct position, the axial position of the second locking nut 424 on the Y-axis bolt 421 is rotated so that the second locking nut 424 abuts against the Y-axis slider 41. Thus, the second locking nut 424 and the Y-axis slider 41 abut against each other, providing axial preload to the Y-axis bolt 421 and increasing the friction of the threads when the Y-axis bolt 421 rotates, thereby locking the position of the Y-axis bolt 421 relative to the Y-axis slider 41. The X-axis adjustment mechanism 52 also includes a third locking nut 524, which is threadedly connected to the X-axis slider 51. The first end of the third spring 523 abuts against the X-axis support 522, and the second end of the third spring 523 abuts against the third locking nut 524. When the axial extension length of the X-axis bolt 521 is adjusted to the correct position, the axial position of the third locking nut 524 on the X-axis bolt 521 is rotated so that the third locking nut 524 abuts against the X-axis slider 51. Thus, the third locking nut 524 and the X-axis slider 51 abut against each other, providing axial preload to the X-axis bolt 521 and increasing the friction of the threads when the X-axis bolt 521 rotates, thereby locking the position of the X-axis bolt 521 relative to the X-axis slider 51.
[0034] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A spherical pair, characterized in that, include: A connecting rod, the first end of which is used to connect to the bracket, and the second end of which is provided with a spherical outer flange, the spherical surface of which faces the first end of the connecting rod; A fixing block having a through cavity, a spherical inner flange being provided at the first end of the through cavity, the spherical surface of the spherical inner flange facing the second end of the through cavity, the spherical inner flange being fitted and connected to the spherical outer flange, and a connecting plate being provided at the second end of the through cavity for connecting to a reflective lens; The first spring is disposed in the through cavity, with its first end abutting against the spherical outer flange and its second end abutting against the connecting plate. There is a gap between the spherical outer flange and the connecting plate.
2. The spherical pair according to claim 1, characterized in that: The outer flange of the spherical surface is provided with an annular groove, the connecting plate is provided with an annular protrusion, the first end of the first spring is located inside the annular groove, and the second end of the first spring is located inside the annular protrusion.
3. The spherical pair according to claim 1, characterized in that: The connecting plate is provided with a U-shaped groove, the opening width of which is greater than or equal to the thickness of the reflective lens, and the U-shaped groove is used to hold the reflective lens.
4. A large-aperture mirror mount system, characterized in that, include: Base; The bracket is mounted on the base; And the spherical pair as described in any one of claims 1-3, wherein the connecting rod is adjustable to be connected to the bracket at varying distances, and the connecting plate is used to connect to the reflecting lens.
5. The large-aperture mirror mount system according to claim 4, characterized in that: It also includes a support rod, the bracket is provided with a first threaded hole, the first end of the support rod is threaded to the first threaded hole, and the second end of the support rod is connected to the connecting rod.
6. The large-aperture mirror mount system according to claim 5, characterized in that: There are three first threaded holes, which are distributed in an equilateral triangle on the bracket, with two of them distributed in the horizontal direction.
7. The large-aperture mirror mount system according to claim 5, characterized in that: It also includes a first locking nut, which is threaded to the first end of the support rod and is located on the side of the bracket away from the reflective lens.
8. The large-aperture mirror mount system according to claim 4, characterized in that: It also includes a Y-axis sliding pair, which includes a Y-axis slider and a Y-axis adjusting mechanism. The Y-axis slider is slidably connected to the base. The Y-axis adjusting mechanism includes a Y-axis support, a Y-axis bolt, and a second spring. The Y-axis support is connected to the base and has a first through hole. The Y-axis slider has a second threaded hole. The Y-axis bolt passes through the first through hole and is threaded to the second threaded hole. The second spring is sleeved on the outer diameter side of the Y-axis bolt and is located between the Y-axis support and the Y-axis slider.
9. The large-aperture mirror mount system according to claim 8, characterized in that: It also includes an X-axis sliding pair, which includes an X-axis slider and an X-axis adjusting mechanism. The X-axis slider is slidably connected to the Y-axis slider. The X-axis adjusting mechanism includes an X-axis support, an X-axis bolt, and a third spring. The X-axis support is connected to the Y-axis slider. The X-axis support is provided with a second through hole. The X-axis slider is provided with a third threaded hole. The X-axis bolt passes through the second through hole and is threadedly connected to the third threaded hole. The third spring is sleeved on the outer diameter side of the X-axis bolt and is located between the X-axis support and the X-axis slider.
10. The large-aperture mirror mount system according to claim 9, characterized in that: The Y-axis adjustment mechanism further includes a second locking nut, which is threadedly connected to the Y-axis bolt. The first end of the second spring abuts against the Y-axis support, and the second end of the second spring abuts against the second locking nut. The X-axis adjustment mechanism further includes a third locking nut, which is threadedly connected to the X-axis slider. The first end of the third spring abuts against the X-axis support, and the second end of the third spring abuts against the third locking nut.