Magnetic type adjustable filter and filter module

Abstract

The utility model relates to a magnetic type adjustable filter and a filter module, and the magnetic type adjustable filter comprises a first filter and a second filter which are rotatably connected with each other. A first magnetic suction mounting seat is arranged at the front end of the first filter and is used for being assembled and connected with a magnetic suction filter; and a second magnetic mounting seat is arranged at the rear end of the second filter and is used for being assembled and connected with a magnetic filter or an adapter ring assembled at the front end of the lens. In this way, the filter module can be conveniently and rapidly combined with the adapter ring and the magnetic filter to be installed at the front end of the lens for use, rapid switching of the filter module combination form is achieved, the requirement of photography enthusiasts for efficient assembly and use is completely met, and then the experience feeling of photography is improved.

Description

Technical Field

[0001] This utility model belongs to the field of photographic equipment technology, and specifically relates to a magnetic adjustable filter and filter module. Background Technology

[0002] Currently, filters are among the most commonly used photographic equipment. Rotary adjustable filters, in particular, are popular among photography enthusiasts due to their multi-level adjustment capabilities. However, the applicant has discovered that existing rotary adjustable filters on the market all use a threaded structure to assemble and connect with the adapter ring at the front of the lens. This same threaded structure is also used with other single-element filters. This assembly structure has the following drawbacks:

[0003] (1) The assembly time is relatively long (generally at least 30 seconds), the assembly operation is troublesome, and the screw threads are easily damaged due to misalignment during the assembly process;

[0004] (2) It is very time-consuming (about 2 to 3 minutes) and inconvenient to disassemble and replace different effect filters, especially for photography equipment mounted on tripods and other shooting equipment. One hand needs to hold the photography equipment in place while the other hand unscrews the rotating adjustable filter or single filter, which is extremely difficult. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a magnetically adjustable filter and filter module.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a magnetically adjustable filter, comprising a first filter and a second filter rotatably connected to each other; the front end of the first filter is provided with a first magnetic mounting base for assembly and connection with the magnetically adjustable filter.

[0008] The rear end of the second filter is provided with a second magnetic mounting base for assembly and connection with a magnetic filter or an adapter ring mounted on the front end of the lens.

[0009] Furthermore, the first filter frame of the first filter is provided with magnetic material, so that the front surface of the first filter forms a first annular magnetic surface. The outer edge of the first annular magnetic surface is provided with a protruding first positioning ring. The first annular magnetic surface and the first positioning ring constitute the first magnetic mounting base.

[0010] The second filter has a magnetic material inside its second filter frame, which forms a second annular magnetic surface on the back surface of the second filter. The inner edge of the second annular magnetic surface has a raised second positioning ring. The second annular magnetic surface and the second positioning ring together form the second magnetic mounting base.

[0011] Furthermore, the inner surface of the first positioning ring is provided with two or more first fastening parts for fastening with the magnetic filter, and the outer surface of the second positioning ring is provided with two or more second fastening parts for fastening with the magnetic filter or adapter ring.

[0012] Furthermore, both the first filter frame and the second filter frame are provided with filter mounting holes. The wall of the filter mounting hole is provided with an annular mounting platform. The first filter lens of the first filter and the second filter lens of the second filter are respectively installed in the filter mounting holes of the first filter frame and the second filter frame, and their circumferential edges are connected to the annular mounting platform. The first filter frame and the second filter frame are also provided with a pressure ring. The pressure ring is installed in the filter mounting hole and presses down on the circumferential edge of the first filter lens or the second filter lens.

[0013] The magnetic material is disposed within the cavity formed by the pressure ring and the annular assembly platform, and is located on the circumferential periphery of the first filter lens and the second filter lens.

[0014] Furthermore, the inner surface of the pressure ring is provided with an annular groove, and the magnetic material is fixed in the annular groove, so that the outer surface of the pressure ring forms the first annular magnetic attraction surface or the second annular magnetic attraction surface.

[0015] Furthermore, the peripheral surfaces of the first filter frame and the second filter frame are both provided with first lugs. The first lug of the first filter frame is aligned with the position of at least one first fastening part, and the first lug of the second filter frame is aligned with the position of at least one second fastening part.

[0016] Furthermore, the surface of the first filter frame or the surface of the second filter frame is provided with an injection hole, which is connected to the rotational connection between the first filter and the second filter.

[0017] Secondly, this utility model also provides a filter module, including the above-mentioned magnetic adjustable filter, and further including:

[0018] An adapter ring is used to mount the front end of a lens. The front end of the adapter ring is provided with a mounting base, which is magnetically connected to a magnetic adjustable filter or a magnetic filter.

[0019] One or more magnetic filters are provided, with a third magnetic mounting base and a fourth magnetic mounting base respectively on the front and rear surfaces of the third filter frame of the magnetic filter. In use, the first magnetic mounting base and the fourth magnetic mounting base of the magnetic adjustable filter are magnetically connected to each other, and the second magnetic mounting base of the magnetic adjustable filter is magnetically connected to the third filter frame of the magnetic filter or magnetically connected to the adapter ring.

[0020] Furthermore, the third filter frame is provided with magnetic material inside, so that the front and rear surfaces of the third filter frame respectively form a third annular magnetic attraction surface and a fourth annular magnetic attraction surface. The outer edge of the third annular magnetic attraction surface is provided with a raised third positioning ring, and the rear surface of the third filter frame is provided with a raised fourth positioning ring. The surface of the fourth positioning ring is the fourth annular magnetic attraction surface and constitutes the fourth magnetic attraction mounting base. The third annular magnetic attraction surface and the third positioning ring constitute the third magnetic attraction mounting base.

[0021] The adapter ring has a fifth positioning ring at its front end, and the fifth positioning ring and the front end face of the adapter ring together form the mounting base.

[0022] Furthermore, the inner surface of the third positioning ring is provided with two or more third fastening parts, the outer surface of the fourth positioning ring is provided with two or more fourth fastening parts, and the inner surface of the fifth positioning ring is provided with two or more fifth fastening parts.

[0023] During assembly and use, the fourth positioning ring and the fourth fastening part of the magnetic filter are both placed inside the inner ring of the first positioning ring of the magnetic adjustable filter, and the fourth fastening part is engaged with or separated from the first fastening part provided on the inner surface of the first positioning ring as the fourth positioning ring and the first positioning ring rotate relative to each other; or, the fourth positioning ring and the fourth fastening part are both placed inside the inner ring of the fifth positioning ring of the adapter ring, and the fourth fastening part is engaged with or separated from the fifth fastening part as the fourth positioning ring and the fifth positioning ring rotate relative to each other.

[0024] The second positioning ring and the second fastening part on the outer surface of the magnetically adjustable filter are both placed inside the inner ring of the third positioning ring of the magnetically adjustable filter. The second fastening part is engaged with or separated from the third fastening part as the second positioning ring and the third positioning ring rotate relative to each other. Alternatively, the second positioning ring and the second fastening part on the outer surface of the filter are both placed inside the inner ring of the fifth positioning ring of the adapter ring. The second fastening part is engaged with or separated from the fifth fastening part as the second positioning ring and the fifth positioning ring rotate relative to each other.

[0025] Furthermore, the peripheral surface of the third filter frame of the magnetic filter is provided with a second lug, and the second lug is aligned with the position of at least one fifth fastening part.

[0026] The beneficial effects of this utility model are:

[0027] Through the above-described technical solution, this utility model allows for convenient and quick assembly and installation of the adapter ring and magnetic filter onto the front of a lens, enabling rapid switching of filter module combination forms. This fully meets the requirements of photography enthusiasts for efficient assembly and use, thereby enhancing the photography experience. Attached Figure Description

[0028] Figure 1 This is a front view structural diagram of the magnetic adjustable filter described in this embodiment of the utility model;

[0029] Figure 2 This is a rear view structural diagram of the magnetic adjustable filter described in this embodiment of the utility model;

[0030] Figure 3 This is a cross-sectional view of the magnetic adjustable filter described in this embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of one combination form of the filter module described in this utility model embodiment;

[0032] Figure 5 yes Figure 4 A schematic diagram of the assembly structure of the filter module;

[0033] Figure 6 This is a schematic diagram of another combination form of the filter module described in this utility model embodiment;

[0034] Figure 7 This is a rear view structural diagram of the magnetic filter in the filter module described in this embodiment of the utility model.

[0035] Explanation of reference numerals in the attached drawings: 100, Magnetic adjustable filter; 101, First filter; 102, Second filter; 103, First magnetic mounting base; 104, Second magnetic mounting base; 105, First filter frame; 106, First annular magnetic surface; 107, First positioning ring; 108, Second filter frame; 109, Second annular magnetic surface; 110, Second positioning ring; 111, Pressure ring; 112, Filter mounting hole; 113, Annular mounting platform; 114, First filter element; 115, Second filter element; 116, Magnetic block; 117, Annular groove; 118, First fastening part; 119, Second fastening part. Tightening part, 120, First lug, 121, Connecting lug, 122, Annular connecting groove, 123, Filling hole, 200, Adapter ring, 201, Mounting base, 202, Fifth positioning ring, 203, Fifth fastening part, 204, Front end face, 300, Magnetic filter, 301, Third filter frame, 302, Third magnetic mounting base, 303, Fourth magnetic mounting base, 304, Third annular magnetic surface, 305, Fourth annular magnetic surface, 306, Third positioning ring, 307, Fourth positioning ring, 308, Third fastening part, 309, Fourth fastening part, 310, Second lug, 400, Lens. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0037] like Figure 1-3 As shown, the magnetically adjustable filter 100 of this utility model embodiment includes a first filter 101 and a second filter 102 rotatably connected to each other. Specifically, the first filter 101 includes a first filter frame 105 and a first filter lens 114 mounted on the first filter frame 105; the second filter 102 includes a second filter frame 108 and a second filter lens 115 mounted on the second filter frame 108; the rear end of the first filter frame 105 is rotatably connected to the front end of the second filter frame 108; more specifically, both the first filter frame 105 and the second filter frame 108 are provided with filter mounting holes 112. The filter mounting hole 112 has an annular mounting platform 113 on its wall. The first filter element 114 of the first filter 101 and the second filter element 115 of the second filter 102 are respectively installed in the filter mounting holes 112 of the first filter frame 105 and the second filter frame 108, and their circumferential edges are connected to the annular mounting platform 113. The first filter frame 105 and the second filter frame 108 are also provided with a pressure ring 111, which is installed in the filter mounting hole 112 (the first filter...). The retaining ring 111 of the first filter 101 is connected to the wall of the filter mounting hole 112, and the retaining ring 111 of the second filter 102 is connected to the inner ring wall of the second positioning ring 110 (the connection structure can be a threaded structure). It presses against the circumferential edge of the first filter lens 114 or the second filter lens 115 to fix the first filter lens 114 and the second filter lens 115 onto the first filter frame 105 and the second filter frame 108, respectively. The filter element 115 can be one of a star filter, UV filter, polarizing filter, softbox filter, or graduated neutral density (ND) filter. The rear end of the first filter frame 105 is provided with a connecting protrusion 121, and the front end of the second filter frame 108 is provided with an annular connecting groove 122. The connecting protrusion 121 is rotatably mounted in the annular connecting groove 122, so that the first filter frame 105 and the second filter frame 108 are rotatably connected to each other, thereby realizing the rotational adjustment of the filter, such as realizing multi-level adjustment of the ND filter.

[0038] For example Figure 1-3As shown, the first filter 101 of the magnetic adjustable filter of this utility model has a first magnetic mounting base 103 at its front end for assembly and connection with the magnetic filter; the second filter 102 has a second magnetic mounting base 104 at its rear end for assembly and connection with the magnetic filter or an adapter ring assembled on the front end of the lens. The specific structure can be as follows: The first filter frame 105 of the first filter 101 contains a magnetic material, forming a first annular magnetic surface 106 on the front surface of the first filter 101. A raised first positioning ring 107 is provided on the outer edge of the first annular magnetic surface 106. The first annular magnetic surface 106 and the first positioning ring 107 constitute the first magnetic mounting base 103. The second filter frame 108 of the second filter 102 contains a magnetic material, forming a second annular magnetic surface 109 on the rear surface of the second filter 102. A raised second positioning ring 110 is provided on the inner edge of the second annular magnetic surface 109. The end face of the second positioning ring 110 is flush with or substantially flush with the second annular magnetic surface 109. The two annular magnetic surfaces 109 and the second positioning ring 110 constitute the second magnetic mounting base 104; wherein the magnetic material is a magnetic block 116, preferably a single annular magnetic block, but it can also be multiple annularly spaced arc-shaped magnetic blocks. The magnetic material is disposed in the cavity formed by the pressure ring 111 and the annular mounting platform 113, and is located on the circumferential periphery of the first filter lens 114 and the second filter lens 115. Specifically, the inner surface of the pressure ring 111 is provided with an annular groove 117, and the magnetic block 116 is fixed in the annular groove 117 (for example, the magnetic block 116 is fixed in the annular groove 117 by adhesive), so that the outer surface of the pressure ring 111 forms the first annular magnetic surface 106 or the second annular magnetic surface 109.

[0039] When the magnetic adjustable filter 100 of this utility model is assembled and used, the magnetic filter can be assembled to the front end of the first filter 101 through the first magnetic mounting base 103, and the magnetic filter can be assembled to the rear end of the second filter 102 through the second magnetic mounting base 104, or the second filter 102 can be assembled onto the adapter ring. Specifically, it can be as follows: Figure 4As shown in Figures 5 and 7, the rear end of the second filter 102 of the magnetic adjustable filter 100 of this utility model is magnetically connected to a magnetic filter 300 via a second magnetic mounting base 104. The rear end of the magnetic filter 300 is magnetically connected to an adapter ring 200 (the rear end of the adapter ring 200 has a threaded portion, and is detachably mounted to the front end of the lens 400 via this threaded portion). The magnetic adjustable filter 100, the magnetic filter 300, and the adapter ring 200 constitute a filter module; wherein, the magnetic filter 300... The filter includes a third filter frame 301. The front and rear surfaces of the third filter frame 301 are respectively provided with a third magnetic mounting base 302 and a fourth magnetic mounting base 303. More specifically, the third filter frame 301 contains a magnetic material (preferably a magnetic block, but also multiple interlocking arc-shaped magnetic blocks), forming a third annular magnetic surface 304 and a fourth annular magnetic surface 305 on the front and rear surfaces of the third filter frame 301, respectively. A raised third positioning ring 306 is provided on the outer edge of the surface 304, and a raised fourth positioning ring 307 is provided on the rear surface of the third filter frame 301. The surface of the fourth positioning ring 307 is the fourth annular magnetic suction surface 305, which constitutes the fourth magnetic suction mounting base 303. The third annular magnetic suction surface 304 and the third positioning ring 306 constitute the third magnetic suction mounting base 302. The second magnetic suction mounting base 104 of the magnetic adjustable filter 100 and the third filter frame 301 of the magnetic filter 300 interact with each other. The magnetic filter 300 is magnetically connected to the fourth magnetic mounting base 303 and the adapter ring 200. The adapter ring 200 is used to mount the front end of the lens 400. The front end of the adapter ring 200 is provided with a mounting base 201. Specifically, the front end of the adapter ring 200 has a fifth positioning ring 202. The fifth positioning ring 202 and the front end face 204 of the adapter ring 200 constitute the mounting base 201. The fourth magnetic mounting base 303 of the magnetic filter 300 is magnetically connected to the mounting base 201.

[0040] Of course, the rear end of the second filter 102 of the magnetically adjustable filter 100 can also be magnetically connected to the adapter ring 200 (mounting base 201) via the second magnetic mounting base 104, and the front end of the first filter 101 is magnetically connected to the fourth magnetic mounting base 303 via the first magnetic mounting base 103, so that the magnetic filter 300 is assembled on the front end of the magnetically adjustable filter 100 (first filter 101), as shown below. Figure 6 As shown.

[0041] In this way, the magnetic adjustable filter 100 described in this utility model can be conveniently and quickly combined with the adapter ring 200 and the magnetic filter 300 and installed on the front of the lens. The installation and disassembly process takes about 1 second to 2 seconds. Compared with the existing adjustable filter with threaded structure connection, which takes about 2 to 3 minutes, the time is significantly reduced. This realizes the rapid switching of filter module combination form, fully meets the requirements of photography enthusiasts for efficient assembly and use, and thus improves the photography experience.

[0042] As a preferred embodiment of this utility model, such as Figure 1-3 As shown in Figures 5 and 7, the inner surface of the first positioning ring 107 of the magnetic adjustable filter 100 of this utility model is provided with two or more first fastening parts 118 for fastening with the magnetic filter, and the outer surface of the second positioning ring 110 is provided with two or more second fastening parts 119 for fastening with the magnetic filter or adapter ring. Correspondingly, the inner surface of the third positioning ring 306 of the magnetic filter 300 is provided with two or more third fastening parts 308, the outer surface of the fourth positioning ring 307 is provided with two or more fourth fastening parts 309, and the inner surface of the fifth positioning ring 202 is provided with two or more fifth fastening parts 203. During assembly and use, the fourth positioning ring 307 and the fourth fastening part 309 of the magnetic filter 300 are both placed inside the inner ring of the first positioning ring 107 of the magnetic adjustable filter, and the fourth fastening part 309, as the fourth positioning ring 307 and the first positioning ring 107 rotate relative to each other, is engaged with or separated from the first fastening part 118 provided on the inner surface of the first positioning ring 107; or, the fourth positioning ring 307 and the fourth fastening part 309 are both placed inside the inner ring of the fifth positioning ring 202 of the adapter ring 200, and the fourth fastening part 309, as the fourth positioning ring 307 and the fifth positioning ring 202 rotate relative to each other, is engaged with or separated from the fifth fastening part 203. Separation; the second positioning ring 110 of the magnetic adjustable filter and the second fastening part 119 provided on its outer surface are both placed inside the inner ring of the third positioning ring 306 of the magnetic filter 300, and the second fastening part 119 is engaged with or separated from the third fastening part 308 as the second positioning ring 110 and the third positioning ring 306 rotate relative to each other; or, the second positioning ring 110 and the second fastening part 119 provided on its outer surface are both placed inside the inner ring of the fifth positioning ring 202 of the adapter ring 200, and the second fastening part 119 is engaged with or separated from the fifth fastening part 203 as the second positioning ring 110 and the fifth positioning ring 202 rotate relative to each other.

[0043] In this way, by setting the first fastening part 308 to the fifth fastening part 203 on the first positioning ring 107 to the fifth positioning ring 202 respectively, the magnetic adjustable filter 100 is locked with the adapter ring 200 and the magnetic filter 300, which improves the stability and reliability of the magnetic connection, completely avoids the problem of accidental falling, and has high safety.

[0044] As another preferred embodiment of this utility model, such as Figure 1-7 As shown, the peripheral surfaces of the first filter frame 105 and the second filter frame 108 of the magnetic adjustable filter 100 of this invention are each provided with a first lug 120. The first lug 120 of the first filter frame 105 is aligned with at least one first fastening part 118, and the first lug 120 of the second filter frame 108 is aligned with at least one second fastening part 119. Meanwhile, the peripheral surface of the third filter frame 301 of the magnetic filter 300 is provided with a second lug 310, and the second lug 310 is aligned with at least one fifth fastening part 203. Users can easily, conveniently, and quickly rotate and lock the magnetic adjustable filter 100, adapter ring 200, and magnetic filter 300 together, or separate and disassemble them, by placing two or more fingers on the corresponding first lug 120 or second lug 310. Moreover, the entire operation process will not involve contact with the filter elements of the magnetic adjustable filter 100 and magnetic filter 300, ensuring the cleanliness of the filter elements and preventing them from being scratched, thereby improving the shooting quality.

[0045] Preferably, the outer ends of the first lug 120 and the second lug 310 are provided with recesses to conform to ergonomics, allowing the fingers to grip the first lug 120 or the second lug 310 more stably and comfortably. Moreover, the recessed surface of the recess is provided with anti-slip texture (not shown in the figure). The anti-slip texture can be multiple parallel horizontal grooves, intersecting mesh grooves, or one or more raised ribs. The anti-slip texture increases the friction between the recess and the fingers, further improving the stability and safety of disassembly and assembly operations.

[0046] In addition, the peripheral surfaces of the first filter frame 105 and the second filter frame 108 of the magnetic adjustable filter 100 and the third filter frame 301 of the magnetic filter 300 are provided with locking marks. The locking marks can be the first lug 120 and the second lug 310, or they can be color marking areas or marking points, etc., and are directly opposite one of the locking parts (the first fastening part 118, the second fastening part 119, the third fastening part 308 and the fourth fastening part 309). When the magnetic adjustable filter 100 and the magnetic filter 300 are rotated until the locking marks overlap, their locking parts interlock, which improves the accuracy and speed of operation when the user is assembling and disassembling the magnetic adjustable filter 100 and the magnetic filter 300.

[0047] In addition, such as Figure 3 As shown, the surface of the second filter frame 108 of the second filter 102 of the magnetically adjustable filter 100 of this utility model is provided with an injection hole 123. The injection hole 123 is connected to the rotational connection between the first filter 101 and the second filter 102. Damping oil (such as light torque damping oil) is injected into the rotational connection through the injection hole 123. On the one hand, it improves the rotational adjustment performance of the magnetically adjustable filter 100, thereby improving the filter effect. On the other hand, it enhances the operating feel between the first filter 101 and the second filter 102, which is beneficial for rotational adjustment.

[0048] More specifically, the injection hole 123 is disposed on the peripheral surface of the second filter frame 108. When the first lug 120 is installed on the peripheral surface of the second filter frame 108, it covers the injection hole 123. This can prevent the damping oil from flowing out and causing a reduction in rotation adjustment performance and product contamination. It can also prevent dust and other foreign objects from entering the rotational connection between the first filter 101 and the second filter 102 through the injection hole 123, thus playing a protective role.

[0049] Of course, the injection hole 123 can also be set on the surface of the first filter frame 105 of the first filter 101.

[0050] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A magnetically adjustable filter, comprising a first filter (101) and a second filter (102) rotatably connected to each other; characterized in that, The front end of the first filter (101) is provided with a first magnetic mounting base (103) for assembly and connection with the magnetic filter; The rear end of the second filter (102) is provided with a second magnetic mounting base (104) for assembly and connection with a magnetic filter or an adapter ring mounted on the front end of the lens.

2. The magnetically adjustable filter according to claim 1, characterized in that, The first filter frame (105) of the first filter (101) is provided with magnetic material, so that the front surface of the first filter (101) forms a first annular magnetic surface (106). The outer edge of the first annular magnetic surface (106) is provided with a raised first positioning ring (107). The first annular magnetic surface (106) and the first positioning ring (107) constitute the first magnetic mounting base (103). The second filter (102) has a magnetic material inside the second filter frame (108) so that the rear surface of the second filter (102) forms a second annular magnetic surface (109). The outer edge of the second annular magnetic surface (109) has a raised second positioning ring (110). The second annular magnetic surface (109) and the second positioning ring (110) constitute the second magnetic mounting base (104).

3. The magnetically adjustable filter according to claim 2, characterized in that, The inner surface of the first positioning ring (107) is provided with two or more first fastening parts (118) for fastening with the magnetic filter, and the outer surface of the second positioning ring (110) is provided with two or more second fastening parts (119) for fastening with the magnetic filter or adapter ring.

4. The magnetically adjustable filter according to claim 3, characterized in that, Both the first filter frame (105) and the second filter frame (108) are provided with filter mounting holes (112). The wall of the filter mounting hole (112) is provided with an annular mounting platform (113). The first filter lens (114) of the first filter (101) and the second filter lens (115) of the second filter (102) are respectively installed in the filter mounting holes (112) of the first filter frame (105) and the second filter frame (108), and the circumferential edge is connected to the annular mounting platform (113). The first filter frame (105) and the second filter frame (108) are also provided with a pressure ring (111). The pressure ring (111) is installed in the filter mounting hole (112) and presses the circumferential edge of the first filter lens (114) or the second filter lens (115). The magnetic material is disposed in the cavity formed by the pressure ring (111) and the annular assembly stage (113), and is located on the circumferential periphery of the first filter lens (114) and the second filter lens (115).

5. The magnetically adjustable filter according to claim 4, characterized in that, The inner surface of the pressure ring (111) is provided with an annular groove (117), and the magnetic material is fixed in the annular groove (117), so that the outer surface of the pressure ring (111) forms the first annular magnetic attraction surface (106) or the second annular magnetic attraction surface (109).

6. The magnetically adjustable filter according to any one of claims 2-5, characterized in that, The peripheral surfaces of the first filter frame (105) and the second filter frame (108) are provided with first lugs (120). The first lugs (120) of the first filter frame (105) are aligned with at least one first fastening part (118), and the first lugs (120) of the second filter frame (108) are aligned with at least one second fastening part (119).

7. The magnetically adjustable filter according to any one of claims 2-5, characterized in that, The surface of the first filter frame (105) or the surface of the second filter frame (108) is provided with an injection hole (123), which is connected to the rotational connection between the first filter (101) and the second filter (102).

8. A filter module, characterized in that, Including the magnetically adjustable filter (100) as described in any one of claims 1-7, it further includes: An adapter ring (200) is used to mount on the front end of a lens. The front end of the adapter ring (200) is provided with a mounting base (201), which is magnetically connected to a magnetic adjustable filter (100) or a magnetic filter (300). One or more magnetic filters (300) are provided with a third magnetic mounting base (302) and a fourth magnetic mounting base (303) on the front and rear sides of the third filter frame (301) of the magnetic filter (300). When in use, the first magnetic mounting base (103) of the magnetic adjustable filter and the fourth magnetic mounting base (303) of the magnetic filter (300) are magnetically connected to each other. The second magnetic mounting base (104) of the magnetic adjustable filter is magnetically connected to the third filter frame (301) of the magnetic filter (300) or magnetically connected to the adapter ring (200).

9. The filter module according to claim 8, characterized in that, The third filter frame (301) is provided with magnetic material inside, so that the front and rear surfaces of the third filter frame (301) respectively form a third annular magnetic suction surface (304) and a fourth annular magnetic suction surface (305). The outer edge of the third annular magnetic suction surface (304) is provided with a raised third positioning ring (306), and the rear surface of the third filter frame (301) is provided with a raised fourth positioning ring (307). The surface of the fourth positioning ring (307) is the fourth annular magnetic suction surface (305), and forms the fourth magnetic suction mounting base (303). The third annular magnetic suction surface (304) and the third positioning ring (306) form the third magnetic suction mounting base (302). The front end of the adapter ring (200) has a fifth positioning ring (202), and the fifth positioning ring (202) and the front end face of the adapter ring (200) constitute the mounting base (201).

10. The filter module according to claim 9, characterized in that, The inner surface of the third positioning ring (306) is provided with two or more third fastening parts (308), the outer surface of the fourth positioning ring (307) is provided with two or more fourth fastening parts (309), and the inner surface of the fifth positioning ring (202) is provided with two or more fifth fastening parts (203). When assembled and used, the fourth positioning ring (307) and the fourth fastening part (309) of the magnetic filter (300) are both placed inside the inner ring of the first positioning ring (107) of the magnetic adjustable filter, and the fourth fastening part (309) is engaged or separated from the first fastening part (118) provided on the inner surface of the first positioning ring (107) as the fourth positioning ring (307) and the first positioning ring (107) rotate relative to each other; or, the fourth positioning ring (307) and the fourth fastening part (309) are both placed inside the inner ring of the fifth positioning ring (202) of the adapter ring (200), and the fourth fastening part (309) is engaged or separated from the fifth fastening part (203) as the fourth positioning ring (307) and the fifth positioning ring (202) rotate relative to each other; The second positioning ring (110) of the magnetic adjustable filter and the second fastening part (119) provided on its outer surface are both placed inside the inner ring of the third positioning ring (306) of the magnetic filter (300). The second fastening part (119) is engaged with or separated from the third fastening part (308) as the second positioning ring (110) and the third positioning ring (306) rotate relative to each other. Alternatively, the second positioning ring (110) and the second fastening part (119) provided on its outer surface are both placed inside the inner ring of the fifth positioning ring (202) of the adapter ring (200). The second fastening part (119) is engaged with or separated from the fifth fastening part (203) as the second positioning ring (110) and the fifth positioning ring (202) rotate relative to each other.

11. The filter module according to claim 10, characterized in that, The third filter frame (301) of the magnetic filter (300) is provided with a second lug (310) on its peripheral surface, and the second lug (310) is in the same position as at least one fifth fastening part (203).

Images