Filter system

Abstract

The utility model discloses a filter system, including protective glass, adapter ring, filter subassembly, protective glass is clamped in the obverse side of adapter ring and can rotate in the adapter ring, the adapter ring is provided with the clamping structure that can stretch along the axial direction of adapter ring, the clamping structure is used for fixing the protective glass, the filter subassembly is used for fixing the protective glass, and the filter subassembly is used for fixing the protective glass. The filter assembly can magnetically attract a general filter.

Description

Technical Field

[0001] The utility model relates to the technical field of camera filters, in particular to a filter system. Background Art

[0002] Existing camera filters generally come in two flavors: threaded and magnetic. Threaded filters rely on the threads on the filter frame and lens to lock together, while magnetic filters rely on the attraction of internal magnets, combined with a suitable adapter ring, to attach the filter to the lens, allowing for quick assembly and disassembly. However, existing threaded filter systems require multiple turns to tighten, making them difficult to quickly change filters. While magnetic filters facilitate quick assembly and disassembly, there's still a risk of the protective filter falling off after installation. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a filter system that can be quickly disassembled and assembled while preventing the protective lens from falling off.

[0004] According to an embodiment of the present invention, the filter system includes a protective lens, an adapter ring, and a filter assembly. The protective lens is clamped on the front side of the adapter ring and can rotate in the adapter ring. The adapter ring is provided with a locking structure that can be extended and retracted along the axial direction of the adapter ring. The locking structure is used to fix the protective lens, and the filter assembly can magnetically attract universal filters.

[0005] The filter system according to the embodiment of the present invention has at least the following beneficial effects: an adapter ring is combined with a protective lens, and a latching structure for taking and placing the protective lens is added to one side of the adapter ring. The other side of the adapter ring can quickly magnetically absorb and superimpose other functional filters (such as VND / CPL filters). While facilitating the quick disassembly and assembly of functional filters, the latching structure can prevent the protective lens from falling off.

[0006] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The following is a further description of the specific embodiments of the present invention in conjunction with the accompanying drawings;

[0008] Figure 1 This is the overall structure diagram of the filter system;

[0009] Figure 2 This is an exploded diagram of the filter system;

[0010] Figure 3 This is an exploded diagram of the locking structure on the adapter ring;

[0011] Figure 4 This is a partial structural diagram of the adapter ring and filter assembly;

[0012] Figure 5 This is a structural diagram of one of the upper and lower mirror frames;

[0013] Figure 6 This is the second structural diagram of the upper frame and the lower frame. DETAILED DESCRIPTION

[0014] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0015] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0016] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0017] Reference Figures 1 to 6 The present invention provides a filter system, comprising a protective lens 10, an adapter ring 20, and a filter assembly 30, which are arranged in sequence. The protective lens 10 is snapped onto the front of the adapter ring 20 and can rotate within the adapter ring 20. The adapter ring 20 is provided with a latching structure that can extend and retract along the radial direction of the adapter ring 20. The latching structure is used to secure the protective lens 10. The filter assembly 30 is magnetically attached to the back of the adapter ring 20 and can magnetically attract universal filters (such as black and white soft filters). The adapter ring 20 is combined with the protective lens 10, and a latching structure for removing and placing the protective lens 10 is added to one side of the adapter ring 20. The other side of the adapter ring 20 can quickly magnetically attract and superimpose other functional filters (such as VND / CPL filters 37). While facilitating quick removal and installation of functional filters, the latching structure can prevent the protective lens 10 from falling off.

[0018] like Figure 2, the protective lens 10 includes a UV frame 11, a UV filter 12 and a UV pressure ring 13. The inner side of the UV frame 11 is provided with a thread, and the outer ring of the UV frame 11 is provided with a knurling. The UV frame 11 is a threaded structure, and its main function is to install a high-resolution protective lens 10 head, which plays a role in dustproof, waterproof, moisture-proof, etc. It is generally installed directly on the lens and no longer disassembled. The knurling on its outer ring is used to increase friction and facilitate disassembly. In use, the inner thread on the top of the UV frame 11 has the same thread specification as the 82mm lens, and other types of 82mm filters can be used, or they can be used alone. The back of the adapter ring is provided with an adapter ring pressure ring 200 and a magnet 100 arranged under the adapter ring pressure ring 200 to facilitate the magnetic suction of the filter assembly 30. As Figure 3 The locking structure includes a knob 51, a fixing block 52, and a slider 53. The fixing block 52 is fixed to the adapter ring 20. A threaded hole is provided in the center of the fixing block 52. The knob 51 is provided with threads to cooperate with the threaded hole. The adapter ring 20 is provided with a through slot 21. The slider 53 is provided with a groove. The slider 53 can move within the through slot 21. The end of the knob 51 is provided with a hanging platform to pass through the threaded hole and the through slot 21 in sequence to engage with the groove. The knob 51 is rotated to control the slider 53 to move forward and backward along the screw-in direction to fix / release the protective lens 10. That is, the protective lens 10 can be rotated relative to the adapter ring 20 when placed in the adapter ring 20. When rotated to the angle required by the user, the knob 51 on the locking structure is locked to fix it, ensuring that the subsequently added filter is in the direction the user is accustomed to, facilitating subsequent quick installation and removal.

[0019] like Figures 4 to 6 The filter assembly 30 is a VND filter assembly, which includes an upper pressing ring 31, an upper frame 32, a lower frame 33, and a lower pressing ring 34. The upper frame 32 is provided with a CPL1 filter 35, and the lower frame 33 is provided with a CPL2 filter 36. The upper frame 32 and the lower frame 33 are rotatably connected (using a conventional frame rotation connection method, which will not be repeated here), which can achieve the effect of two CPL filters rotating with each other. Figure 5 and Figure 6 The lower frame 33 has a retaining groove 331 on its inner side, and the upper frame 32 has a boss 321 on its inner side. The relative rotation of the upper and lower frames 32 and 33 allows the boss 321 to slide only within the retaining groove 331. Accordingly, the CPL1 filter 35 and the CPL2 filter 36 can only rotate within a certain range. Within the specified range, the rotation of the upper and lower rings causes the angle between the two CPL frames to change. This, leveraging the characteristics of the CPL polarizer, creates a change in transmittance, perfectly achieving the 2-5 transmission levels required for VND. The outer ring is laser-engraved with a corresponding logo. When in use, simply rotate the upper ring to the corresponding logo to obtain the desired level. Through quality control of the CPL polarizer, perfect color cast requirements are achieved, ensuring excellent photography quality.

[0020] like Figure 4 The back of the adapter ring 20 is provided with a limit snap 22. A magnet 100 is provided between the lower pressing ring 34 and the lower frame 33 to attract the magnet on the adapter ring, achieving the effect of quick assembly and disassembly. The lower pressing ring 34 is provided with a snap-on portion 341 to engage with the limit snap 22 to limit the rotation of the filter assembly 30 on the adapter ring 20. When the filter assembly 30 is installed on the adapter ring 20, the lower pressing ring 34 is locked by the limit snap 22 and cannot rotate. At this time, the upper frame 32 can be rotated to reach the desired shooting position. A magnet is provided between the upper pressing ring 31 and the upper frame 32 to act as an adsorption device, allowing other universal filters to be quickly assembled and disassembled from the upper frame 32. The upper pressing ring 31 is provided with a universal snap-on portion to engage with the snap-on portion on the universal filter.

[0021] In the present invention, the outer ring of the upper mirror frame 32 is laser-engraved with a mark corresponding to the rotation angle of the boss 321 .

[0022] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above preferred embodiments can be freely combined and superimposed.

[0023] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A filter system, characterized in that: include: A protective lens (10), an adapter ring (20), and a filter assembly (30); the protective lens (10) is clamped on the front surface of the adapter ring (20) and can rotate in the adapter ring (20); the adapter ring (20) is provided with a clamping structure that can be extended and retracted along the radial direction of the adapter ring (20); the clamping structure is used to fix the protective lens (10); the filter assembly (30) is magnetically attracted to the back surface of the adapter ring (20); and the filter assembly (30) can magnetically attract a universal filter.

2. The filter system according to claim 1, wherein: The locking structure comprises a knob (51), a fixing block (52) and a slider (53); the fixing block (52) is fixed on the adapter ring (20); a threaded hole is provided at the center of the fixing block (52); a thread is provided on the knob (51) to cooperate with the threaded hole; a through slot (21) is provided on the adapter ring (20); a groove is provided on the slider (53); the slider (53) is capable of moving in the through slot (21); a hanging platform is provided at the end of the knob (51) to pass through the threaded hole and the through slot (21) in sequence to engage with the groove; the knob (51) is rotated to control the slider (53) to move forward and backward along the screwing direction to fix / release the protective mirror (10).

3. The filter system according to claim 1, wherein: The back of the adapter ring is provided with an adapter ring pressing ring (200) and a magnet (100) arranged below the adapter ring pressing ring (200).

4. The filter system according to claim 1, wherein: The protective lens (10) comprises a UV lens frame (11), a UV filter (12) and a UV pressing ring (13); the inner side of the UV lens frame (11) is provided with a thread, and the outer ring of the UV lens frame (11) is provided with a knurling.

5. The filter system according to claim 1, wherein: The filter assembly (30) is a VND filter assembly, which comprises an upper pressing ring (31), an upper frame (32), a lower frame (33) and a lower pressing ring (34) in sequence. The upper frame (32) is provided with a CPL1 filter (35), and the lower frame (33) is provided with a CPL2 filter (36). The upper frame (32) and the lower frame (33) are rotatably connected. The upper pressing ring (31) and the upper frame (32) are connected to each other. ), a magnet (100) is provided between the lower pressing ring (34) and the lower mirror frame (33), a magnet (100) is provided between the lower pressing ring (34) and the lower mirror frame (33), a limit bayonet (22) is provided on the back of the adapter ring (20), a clamping portion (341) is provided on the lower pressing ring (34) to be clamped with the limit bayonet (22) to limit the rotation of the filter assembly (30) on the adapter ring (20), and a universal bayonet is provided on the upper pressing ring (31) to adapt to universal filters.

6. The filter system according to claim 5, wherein: A limiting groove (331) is provided on the inner side of the lower mirror frame (33), and a boss (321) is provided on the inner side of the upper mirror frame (32); the upper mirror frame (32) and the lower mirror frame (33) rotate relative to each other so that the boss (321) slides in the limiting groove (331).

7. The filter system according to claim 6, wherein: The outer ring of the upper mirror frame (32) is laser-engraved with a mark corresponding to the rotation angle of the boss (321).

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