Lens rotor module and lens device
By employing a bearing connection and flexible hinge limit design in the lens rotor module, the problem of lens contamination caused by gear set drive is solved, achieving efficient lens fixation and stable rotation, which is suitable for precision optical equipment.
Patent Information
- Application Number
- CN202512033300.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-03-06
AI Technical Summary
In existing technologies, when lenses are driven to rotate by gear sets, they are prone to generating particulate impurities due to friction and wear, leading to lens contamination.
The lens rotor module design is adopted, and the lens unit and the rotor unit are connected by bearings. The lens is fixed by pressure contact between the lens frame and the pressure ring, and the lens is limited by flexible hinges to avoid direct contact or gear transmission, thereby reducing the number of parts and assembly difficulty.
This technology makes the lenses less susceptible to contamination by particulate impurities, improves assembly efficiency and lens rotational stability, reduces friction and wear and particulate matter generation, and is suitable for optical vacuum clean systems.
Smart Images
Figure CN121613580A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of precision optical technology, and more specifically, to a lens rotor module and a lens device. Background Technology
[0002] In the field of precision optics, transmission schemes for achieving high-precision rotation of lenses often rely on stepper motors driving the lenses through gear sets. However, this driving method suffers from the problem of particulate impurities generated by friction and wear between gears, which in turn leads to lens contamination. Summary of the Invention
[0003] The purpose of this application is to provide a lens rotor module and a lens device to address at least one of the technical problems mentioned in the background art.
[0004] To achieve the above objectives, this application adopts the following technical solution: One aspect of this application provides a lens rotor module, including a lens unit, a rotor unit, and a bearing. The bearing has an inner ring and an outer ring connected to each other. The lens unit and the rotor unit are arranged in a first direction. Both the lens unit and the rotor unit are fixed to the inner ring. The outer ring is used to connect to a stator module. The rotor unit is used to generate a magnetic force with the stator module so that both the rotor unit and the lens unit can rotate relative to the stator module. The first direction is parallel to the axial direction of the bearing.
[0005] Preferably, the lens unit includes a lens frame, a lens, and a retaining ring arranged sequentially in the first direction, wherein the lens frame and the retaining ring are in pressure contact with the lens in the first direction, and the retaining ring is fixed to the lens frame.
[0006] The beneficial effect of this technical solution is that the lens is fixed by pressure contact with the frame and the pressure ring. Compared with fixing the lens directly to the inner ring of the bearing through the connector, the lens can be fixed without damaging the lens itself.
[0007] Preferably, the frame includes a first annular convex edge and a second annular convex edge. The lens, the pressure ring, the first annular convex edge, and the second annular convex edge are coaxially arranged. The lens is located inside the first annular convex edge. In the first direction, the lens is in pressure contact with the second annular convex edge. In the radial direction of the lens, the lens is in pressure contact with the first annular convex edge. In the first direction, the pressure ring is located on the side of the lens away from the second annular convex edge. The pressure ring is fixed to the first annular convex edge and is in pressure contact with the lens.
[0008] The beneficial effects of this technical solution are: by limiting the lens through the structure of the lens frame and the pressure ring itself, there is no need to add additional limiting components for limiting the lens, which reduces the number of parts included in the lens rotor module and improves the assembly and production efficiency of the lens rotor module.
[0009] Preferably, the first annular convex edge includes an annular body and a plurality of first flexible hinges, each of the first flexible hinges being evenly distributed in the circumferential direction of the annular body and in pressure contact with the lens in the radial direction of the lens.
[0010] The beneficial effects of this technical solution are as follows: a preload is formed between the first flexible hinge and the lens in the radial direction of the lens. Compared with the introduction of elastic pads to improve the limiting effect on the lens, the setting of the first flexible hinge can reduce the number of parts included in the lens rotor module, reduce the assembly difficulty of the lens rotor module, and improve the assembly and production efficiency of the lens rotor module.
[0011] Optionally, the first flexible hinge includes a first spring portion and a first protrusion portion. The first spring portion extends circumferentially along the convex annular body. Both ends of the first spring portion are fixedly connected to the convex annular body. A first gap is left between the convex annular body and the first spring portion in the radial direction of the convex annular body. The first protrusion portion is fixed to the side of the first spring portion away from the first gap. The first protrusion portion is in pressure contact with the edge of the lens.
[0012] The beneficial effect of this technical solution is that when the lens is installed on the inner side of the first annular convex edge, the first protrusion of each first flexible hinge will contact the edge of the lens. The lens squeezes the first protrusion, causing the first spring portion to deform elastically and bend towards the first gap side, thereby making the lens and each first protrusion in pressure contact under the elastic force of the first spring portion.
[0013] Preferably, the pressure ring includes a pressure ring annular body and a plurality of second flexible hinges fixed to the pressure ring annular body. Each second flexible hinge is located on the side of the pressure ring annular body facing the lens. Each second flexible hinge is evenly distributed along the circumferential direction of the pressure ring annular body. In the first direction, each second flexible hinge is in pressure contact with the lens.
[0014] The beneficial effects of this technical solution are as follows: compared with introducing an elastic pad to improve the limiting effect on the lens, setting a second flexible hinge can reduce the number of parts included in the lens rotor module, reduce the assembly difficulty of the lens rotor module, and improve the assembly and production efficiency of the lens rotor module.
[0015] Optionally, the second flexible hinge includes a second spring portion and a second protrusion portion. The second spring portion extends circumferentially along the pressure ring annular body. Both ends of the first spring portion are fixedly connected to the pressure ring annular body. A second gap is left between the first spring portion and the pressure ring annular body in the first direction. The second protrusion portion is fixed to the side of the second spring portion away from the second gap. The second protrusion portion is in pressure contact with the lens in the first direction.
[0016] The beneficial effect of this technical solution is that, after the lens is installed inside the first annular convex edge, the pressure ring is fixed on the first annular convex edge. At this time, the second protrusion part contacts the lens in the first direction. Under the squeezing action of the lens, the second spring part elastically deforms towards the second gap side, thereby making the second protrusion part pressurize the lens under the elastic force of the second spring part, so that the lens is squeezed on the second annular convex edge, achieving the purpose of limiting the lens in the first direction.
[0017] Another aspect of this application provides a lens device including a stator module and a lens rotor module provided in this application. The rotor unit includes a rotor body, a rotor cover, and multiple permanent magnets. Multiple mounting slots are formed on the rotor body, and each permanent magnet is installed in a corresponding slot. The rotor cover is located on the side of the permanent magnets facing away from the rotor body. The rotor cover is coaxially arranged with the rotor body and is fixedly connected to the rotor body to fix each permanent magnet between the rotor cover and the rotor body. The magnetic poles of the permanent magnets are arranged radially on the rotor body, and the magnetic poles of any two adjacent permanent magnets are arranged in opposite directions. The stator module is fixed to the outer ring.
[0018] Optionally, the stator module includes a stator unit and a stator winding. The stator unit includes an annular body and multiple pole teeth. The annular body is fixed to the outer ring, and each pole tooth is fixed to the inner edge of the annular body. The pole teeth are evenly distributed in the circumferential direction of the annular body. The stator winding includes multiple excitation coils, and each excitation coil is fitted onto each pole tooth in a one-to-one correspondence. The number of pole teeth is the same as the number of permanent magnets. In the radial direction of the annular body, each permanent magnet is located on the side of each pole tooth away from the annular body.
[0019] The beneficial effect of this technical solution is that by energizing each excitation coil, each pole tooth can be energized and generate a magnetic force with each permanent magnet.
[0020] Optionally, the stator winding includes twelve excitation coils, each of which is a first coil to a twelfth coil in the arrangement direction of the excitation coils. The first coil, the fourth coil, the seventh coil, and the tenth coil are connected in series in sequence, the second coil, the fifth coil, the eighth coil, and the eleventh coil are connected in series in sequence, and the third coil, the sixth coil, the ninth coil, and the twelfth coil are connected in series in sequence. The number of excitation coils, the number of pole teeth, and the number of permanent magnets are all the same.
[0021] The beneficial effect of this technical solution is that it enables the excitation coils to be interconnected in a three-phase star connection manner. Specifically, the first coil, the fourth coil, the seventh coil and the tenth coil are connected in series to form the U-phase winding, and the second coil, the fifth coil, the eighth coil and the eleventh coil are connected in series to form the V-phase winding.
[0022] The technical solution provided in this application can achieve at least one of the following beneficial effects: The lens rotor module and lens device provided in this application have both the lens unit and the rotor unit mounted on the inner ring of the bearing and connected to the stator module through the outer ring of the bearing. In other words, the stator module and the lens unit and rotor unit that rotate relative to the stator module are connected by the bearing, rather than in direct contact or through gear transmission. Therefore, no particulate impurities will be generated due to direct contact or gear transmission, making the lens less susceptible to contamination by particulate impurities. The additional technical features and advantages of this application will become more apparent from the following description or from practical application. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the specific embodiments of this application, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0024] Figure 1 An exploded structural diagram of one embodiment of the lens device provided in this application; Figure 2 This is a partial structural schematic diagram of one embodiment of the lens rotor module provided in this application. Figure 3 A three-dimensional structural schematic diagram of one embodiment of the picture frame provided in this application; Figure 4 A three-dimensional structural schematic diagram of one embodiment of the pressure ring provided in this application; Figure 5This is a three-dimensional structural schematic diagram of one embodiment of the rotor cover provided in this application.
[0025] Figure label: 01. Outer frame; 02. Frame; 03. Lens; 04. Pressure ring; 05. Rotor body; 06. Bearing; 07. Excitation coil; 08. Stator unit; 9. Permanent magnet; 10. Rotor cover; 11. Zero-position sensor; 12. Second annular convex edge; 13. First flexible hinge; 14. First annular flange; 15. First gap; 16. First spring section; 17. First protrusion; 18. Second gap; 19. Second spring section; 20. Second protrusion section; 21. Pressure ring ring body; 22. Second flexible hinge; 23. Slot; 24. Cylindrical pin; 25. Polar teeth. Detailed Implementation
[0026] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0029] like Figures 1 to 5 As shown, one aspect of this application provides a lens rotor module including a lens unit, a rotor unit, and a bearing. The bearing has an inner ring and an outer ring connected to each other. The lens unit and the rotor unit are arranged in a first direction. Both the lens unit and the rotor unit are fixed to the inner ring. The outer ring is used to connect to a stator module. The rotor unit is used to generate a magnetic force with the stator module so that both the rotor unit and the lens unit can rotate relative to the stator module. The first direction is parallel to the axial direction of the bearing.
[0030] The bearing 06 is preferably a ceramic bearing.
[0031] The lens rotor module provided in this application mounts both the lens unit and the rotor unit on the inner ring of the bearing 06 and connects to the stator module through the outer ring of the bearing 06. In other words, the stator module and the lens unit and rotor unit that rotate relative to the stator module are connected through the bearing 06, rather than through direct contact or gear transmission. Therefore, no particulate impurities will be generated due to direct contact or gear transmission, making the lens 03 less susceptible to contamination by particulate impurities. In this embodiment, the lens unit may include a lens 03 and a connector, with the lens 03 directly fixed to the inner ring of the bearing 06 via the connector. However, preferably, the lens unit includes a frame 02, a lens 03, and a retaining ring 04 arranged sequentially in the first direction. Both the frame 02 and the retaining ring 04 are in pressure contact with the lens 03 in the first direction, and the retaining ring 04 is fixed to the frame 02. That is, the lens 03 is fixed through pressure contact with the frame 02 and the retaining ring 04. Compared to directly fixing the lens 03 to the inner ring of the bearing 06 via the connector, this application achieves the purpose of fixing the lens 03 without damaging it.
[0032] In this embodiment, a limiting member mounted on the lens frame 02 can be used to limit the radial position of the lens 03. However, preferably, the lens frame 02 includes a first annular flange and a second annular flange. The lens 03, the pressure ring 04, the first annular flange 14, and the second annular flange 12 are coaxially arranged. The lens 03 is located inside the first annular flange 14. In the first direction, the lens 03 is in pressure contact with the second annular flange 12. In the radial direction, the lens 03 is in pressure contact with the first annular flange 14. In the first direction, the pressure ring 04 is located on the side of the lens 03 opposite to the second annular flange 12. The pressure ring 04 is fixed to the first annular flange 14 and is in pressure contact with the lens 03. By limiting the lens 03 through the structure of the lens frame 02 and the pressure ring 04, there is no need to add an additional limiting member for limiting the lens 03, reducing the number of components included in the lens rotor module and improving the assembly and manufacturing efficiency of the lens rotor module.
[0033] In this embodiment, an elastic pad can be provided between the first annular convex edge 14 and the lens 03 to improve the limiting effect on the lens 03. However, preferably, the first annular convex edge 14 includes an annular body and a plurality of first flexible hinges 13, each of which is evenly distributed circumferentially on the annular body and pressurizes against the lens 03 in the radial direction. A preload is formed between each of the first flexible hinges 13 and the lens 03 in the radial direction. Compared to introducing an elastic pad to improve the limiting effect on the lens 03, providing the first flexible hinges 13 reduces the number of parts included in the lens rotor module, lowers the assembly difficulty of the lens rotor module, and improves the assembly and manufacturing efficiency of the lens rotor module.
[0034] Optionally, the first flexible hinge 13 includes a first spring portion 16 and a first protrusion portion 17. The first spring portion 16 extends circumferentially along the annular body of the convex edge, and both ends of the first spring portion 16 are fixedly connected to the annular body of the convex edge. A first gap 15 is left between the annular body of the convex edge and the first spring portion 16 in the radial direction of the annular body of the convex edge. The first protrusion portion 17 is fixed to the side of the first spring portion 16 away from the first gap 15, and the first protrusion portion 17 is in pressure contact with the edge of the lens 03. Thus, when the lens 03 is installed inside the first annular convex edge 14, the first protrusion portion 17 of each first flexible hinge 13 will contact the edge of the lens 03. The lens 03 presses the first protrusion portion 17, causing the first spring portion 16 to elastically deform and bend towards the first gap 15, thereby causing the lens 03 to be in pressure contact with each first protrusion portion 17 under the elastic force of the first spring portion 16. Preferably, a first gap 15 is machined on the first annular convex edge 14, such that the inner portion of the two parts forming the first gap 15 on the first annular convex edge 14 constitutes the first spring piece portion 16. Of course, the first protrusion portion 17 can be omitted, and the first spring piece portion 16 itself can be machined into a structure that extends into the inner side of the annular body of the convex edge; or, only one end of the first spring piece portion 16 can be connected to the annular body of the convex edge, and the other end of the first spring piece portion 16 can be a free end.
[0035] In this embodiment, an elastic pad can be placed between the pressure ring 04 and the lens 03 to improve the limiting effect on the lens 03. However, preferably, the pressure ring 04 includes a pressure ring annular body 21 and a plurality of second flexible hinges 22 fixed to the pressure ring annular body 21. Each second flexible hinge 22 is located on the side of the pressure ring annular body 21 facing the lens 03, and each second flexible hinge 22 is evenly distributed along the circumference of the pressure ring annular body 21. In the first direction, each second flexible hinge 22 is in pressure contact with the lens 03. Compared to introducing an elastic pad to improve the limiting effect on the lens 03, setting the second flexible hinges 22 can reduce the number of parts included in the lens rotor module, reduce the assembly difficulty of the lens rotor module, and improve the assembly and manufacturing efficiency of the lens rotor module.
[0036] Optionally, the second flexible hinge 22 includes a second spring portion 19 and a second protrusion portion 20. The second spring portion 19 extends circumferentially along the pressure ring annular body 21. Both ends of the first spring portion 16 are fixedly connected to the pressure ring annular body 21. A second gap 18 is left between the first spring portion 16 and the pressure ring annular body 21 in the first direction. The second protrusion portion 20 is fixed to the side of the second spring portion 19 away from the second gap 18. The second protrusion portion 20 is in pressure contact with the lens 03 in the first direction. In this way, after the lens 03 is installed inside the first annular convex edge 14, the pressure ring 04 is fixed on the first annular convex edge 14. At this time, the second protrusion 20 contacts the lens 03 in the first direction. Under the squeezing action of the lens 03, the second spring sheet 19 elastically deforms towards the second gap 18, thereby causing the second protrusion 20 to press against the lens 03 under the elastic force of the second spring sheet 19, so that the lens 03 is squeezed on the second annular convex edge 12, thereby achieving the purpose of limiting the lens 03 in the first direction.
[0037] In this embodiment, the first flexible hinge 13 and the second flexible hinge 22 are used to limit the position of the lens 03, thereby improving the reliability of fixing the lens 03 and enhancing the stability of the lens 03's rotation as it rotates with the rotor unit. The materials used for the lens frame 02 and the pressure ring 04 should possess non-magnetic properties and be unaffected by magnetic fields, while ensuring the safety and reliability of the lens 03's installation and fixing. Each flexible hinge structure should possess high fatigue strength and high elastic limit.
[0038] Another aspect of this application provides a lens device including a stator module and a lens rotor module as provided in the embodiments of this application. The rotor unit includes a rotor body 05, a rotor cover 10, and a plurality of permanent magnets 09. The rotor body 05 has a plurality of mounting slots, and each of the permanent magnets 09 is installed in a corresponding mounting slot. The rotor cover 10 is located on the side of the permanent magnets 09 away from the rotor body 05. The rotor cover 10 is coaxially arranged with the rotor body 05. The rotor cover 10 is fixedly connected to the rotor body 05 to fix each of the permanent magnets 09 between the rotor cover 10 and the rotor body 05. The magnetic poles of the permanent magnets 09 are arranged radially on the rotor body 05, and the magnetic poles of any two adjacent permanent magnets 09 are arranged in opposite directions. The stator module is fixed to the outer ring. In this embodiment, the opposite pole arrangement of any two adjacent permanent magnets 09 means that in any two adjacent permanent magnets 09, the N pole of one permanent magnet 09 is positioned near the outer edge of the rotor body 05, and the S pole is positioned near the inner edge of the rotor body 05; the N pole of the other permanent magnet 09 is positioned near the inner edge of the rotor body 05, and the S pole is positioned near the outer edge of the rotor body 05. In other words, each permanent magnet 09 is magnetized using an alternating N-pole and S-pole arrangement. Preferably, a plurality of slots 23 are provided on the rotor cover 10, and each slot 23 corresponds to one of the permanent magnets 09.
[0039] The lens device provided in this application uses the lens rotor module provided in this application. Both the lens unit and the rotor unit are mounted on the inner ring of the bearing 06 and connected to the stator module through the outer ring of the bearing 06. In other words, the stator module and the lens unit and rotor unit that rotate relative to the stator module are connected through the bearing 06, rather than in direct contact or through gear transmission. Therefore, no particulate impurities will be generated due to direct contact or gear transmission, making the lens 03 less susceptible to contamination by particulate impurities.
[0040] Optionally, the stator module includes a stator unit 08 and a stator winding. The stator unit 08 includes an annular body and multiple pole teeth 25. The annular body is fixed to the outer ring, and each pole tooth 25 is fixed to the inner edge of the annular body. The pole teeth 25 are evenly distributed circumferentially on the annular body. The stator winding includes multiple excitation coils 07, each excitation coil 07 being fitted onto each pole tooth 25 in a one-to-one correspondence. The number of pole teeth 25 is the same as the number of permanent magnets 09. In the radial direction of the annular body, each permanent magnet 09 is located on the side of each pole tooth 25 facing away from the annular body. Thus, by energizing each excitation coil 07, each pole tooth 25 can be energized and generate a magnetic force with each permanent magnet 09. In this embodiment, preferably, the lens device further includes an outer frame 01, an annular body fixed to the outer frame 01, a zero-position sensor 11 fixed to the outer frame 01, and a cylindrical pin 24 installed on the outer ring of the rotor cover 10. The cylindrical pin 24 has a relatively small diameter and extends radially along the rotor cover 10. During the rotation of the rotor cover 10, when the cylindrical pin 24 passes the position of the zero-position sensor 11, a zero-return operation is achieved, thereby enabling control of the movement position. Preferably, the pole teeth 25 are made of a high-permeability magnetic material; the outer frame 01, rotor body 05, and rotor cover 10 are preferably made of materials with suitable equal height specific stiffness, excellent fatigue strength, and extremely low coefficient of thermal expansion; the bearing 06 should be made of a non-magnetic material to ensure that the components in the lens unit rotate smoothly without being affected by magnetic forces.
[0041] Optionally, the stator winding includes twelve excitation coils 07, arranged in the direction of their respective arrangement. The first, fourth, seventh, and tenth coils are connected in series; the second, fifth, eighth, and eleventh coils are connected in series; and the third, sixth, ninth, and twelfth coils are connected in series. The number of excitation coils 07, the number of pole teeth 25, and the number of permanent magnets 09 are all the same. This interconnects the excitation coils 07 in a three-phase star connection. Specifically, the first, fourth, seventh, and tenth coils are connected in series to form a U-phase winding, and the second, fifth, eighth, and eleventh coils are connected in series to form a V-phase winding. Current flows through each excitation coil 07, generating a magnetic field at the stator unit 08 that interacts with the magnetic field of the rotor unit, producing a tangential force in the air gap. This generates an electromagnetic torque capable of driving the lens rotor module. By controlling the magnitude and direction of the current, the lens rotor module, under the action of the stator module, drives the lens 03 in high-precision rotation. The radial clearance between the outer diameter of the rotor unit and the inner diameter of the 08 inner ring pole teeth of the stator unit ensures a small gap, which guarantees effective magnetic drive while realizing non-contact transmission. This fundamentally eliminates friction, wear and particulate matter generation, making it particularly suitable for clean system environments such as optical vacuum.
[0042] The permanent magnets 09 are radially magnetized and arranged alternately in a strict NSNS… order in the outer ring direction. The rotor body 05 is fixed to each permanent magnet 09 as a whole, so that the rotor unit itself establishes a strong static magnetic field. Under the action of the magnetic field of the stator unit 08, an electromagnetic torque is formed to drive the rotor unit to rotate by the principle of opposite poles attracting and like poles repelling each other, thereby driving the lens 03 to achieve rotational motion.
[0043] The lens device provided in this application embodiment can achieve high-precision self-driven rotation by controlling the magnitude and direction of the current in each excitation coil 07. It eliminates the need for motor and gear transmission, resulting in a compact structure, low energy loss, and high transmission efficiency. Its design advantages include contactless electromagnetic force drive, eliminating friction, wear, and particulate contamination; the elimination of motors, gears, and other mechanical transmission methods significantly improves transmission efficiency and reduces power loss; and closed-loop position control, based on a closed-loop servo strategy using magnetic field orientation control. By controlling the magnitude and direction of the stator current and considering the position information from the zero-position sensor 11, it comprehensively considers the effects of multiple loads, gravity, and position errors to accurately calculate the output electromagnetic torque, thereby achieving rotational motion control with small torque fluctuations, smooth operation, fast electromagnetic torque response, and excellent system dynamic performance.
[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A lens rotor module, characterized by, The lens unit, the rotor unit and the bearing are connected with each other, the lens unit and the rotor unit are arranged in a first direction, the lens unit and the rotor unit are fixed to the inner ring, the outer ring is used for connecting with a stator module, the rotor unit is used for generating a magnetic force action between the stator module, so that the rotor unit and the lens unit can rotate relative to the stator module, and the first direction is parallel to the axial direction of the bearing.
2. The lens rotor module of claim 1, wherein, The lens unit comprises a mirror frame, a lens and a pressing ring arranged in the first direction, the mirror frame and the pressing ring are in pressure contact with the lens in the first direction, and the pressing ring is fixed to the mirror frame.
3. The lens rotor module of claim 2, wherein, The mirror frame comprises a first annular convex edge and a second annular convex edge, the lens, the pressing ring, the first annular convex edge and the second annular convex edge are coaxially arranged, the lens is located on the inner side of the first annular convex edge, the lens is in pressure contact with the second annular convex edge in the first direction, the lens is in pressure contact with the first annular convex edge in the radial direction of the lens, the pressing ring is located on the side of the lens away from the second annular convex edge in the first direction, the pressing ring is fixed to the first annular convex edge, and the pressing ring is in pressure contact with the lens.
4. The lens rotor module of claim 3, wherein, The first annular convex edge comprises a convex edge annular body and a plurality of first flexible hinges, each first flexible hinge is uniformly distributed in the circumferential direction of the convex edge annular body, and each first flexible hinge is in pressure contact with the lens in the radial direction of the lens.
5. The lens rotor module of claim 4, wherein, The first flexible hinge comprises a first elastic sheet part and a first protruding block part, the first elastic sheet part extends in the circumferential direction of the convex edge annular body, both ends of the first elastic sheet part are fixedly connected with the convex edge annular body, a first gap is left between the convex edge annular body and the first elastic sheet part in the radial direction of the convex edge annular body, the first protruding block part is fixed to the side of the first elastic sheet part away from the first gap, and the first protruding block part is in pressure contact with the edge of the lens.
6. The lens rotor module of claim 5, wherein, The pressing ring comprises a pressing ring annular body and a plurality of second flexible hinges fixed to the pressing ring annular body, each second flexible hinge is located on the side of the pressing ring annular body facing the lens, each second flexible hinge is uniformly distributed in the circumferential direction of the pressing ring annular body, and each second flexible hinge is in pressure contact with the lens in the first direction.
7. The lens rotor module of claim 6, wherein, The second flexible hinge comprises a second elastic sheet part and a second protruding block part, the second elastic sheet part extends in the circumferential direction of the pressing ring annular body, both ends of the first elastic sheet part are fixedly connected with the pressing ring annular body, a second gap is left between the first elastic sheet part and the pressing ring annular body in the first direction, the second protruding block part is fixed to the side of the second elastic sheet part away from the second gap, and the second protruding block part is in pressure contact with the lens in the first direction.
8. A lens device characterized by The lens rotor module comprises a stator module and the lens rotor module as claimed in any one of claims 1 to 7. The rotor unit comprises a rotor body, a rotor gland and a plurality of permanent magnets, the rotor body is formed with a plurality of mounting grooves, each of the permanent magnets is installed in one of the mounting grooves one by one, the rotor gland is located on the side of the permanent magnets away from the rotor body, the rotor gland is coaxially arranged with the rotor body, and the rotor gland is fixedly connected with the rotor body to fix each of the permanent magnets between the rotor gland and the rotor body, the magnetic poles of the permanent magnets are arranged in the radial direction of the rotor body, the magnetic poles of any two adjacent permanent magnets are arranged in opposite directions, and the stator module is fixed to the outer ring.
9. The lens device according to claim 8, wherein The stator module comprises a stator unit and a stator winding, the stator unit comprises an annular body and a plurality of pole teeth, the annular body is fixed to the outer ring, each of the pole teeth is fixed to the inner edge of the annular body, each of the pole teeth is uniformly distributed in the circumferential direction of the annular body, the stator winding comprises a plurality of excitation coils, each of the excitation coils is sleeved on one of the pole teeth one by one, the number of the pole teeth is the same as that of the permanent magnets, and each of the permanent magnets is located on the side of each of the pole teeth away from the annular body in the radial direction of the annular body.
10. The lens device according to claim 9, wherein The stator winding comprises twelve excitation coils, each of the excitation coils is a first coil to a twelfth coil in the arrangement direction of each of the excitation coils, the first coil, the fourth coil, the seventh coil and the tenth coil are sequentially connected in series, the second coil, the fifth coil, the eighth coil and the eleventh coil are sequentially connected in series, and the third coil, the sixth coil, the ninth coil and the twelfth coil are sequentially connected in series, and the number of the excitation coils, the number of the pole teeth and the number of the permanent magnets are the same.