CN212569244U - Filter assembly structure - Google Patents

Abstract

The utility model relates to a photographic goods field, more specifically relates to a filter assembly structure, including filter support and square filter, square filter can install through the mode of magnetism actuation on the filter support, still include CPL polarized lens subassembly, including the CPL mirror seat with rotationally install the CPL polarizer on the CPL mirror seat, CPL polarized lens subassembly can be connected with square filter through the mode of magnetism actuation. The filter assembly structure allows the CPL polarizer component to be mounted on the filter support to be matched with other filters for use, so that the multifunctional use of the filter assembly structure is realized, and a better shooting effect is obtained. Additionally, the utility model discloses a filter assembly structure overall structure is more compact, avoids producing the vignetting when using wide-angle lens, compatible multiple super wide-angle lens to can prevent the light leak problem from appearing, and CPL polarizer assembly's installation is simple and convenient more fast.

Description

Filter assembly structure

Technical Field

The utility model relates to a photographic goods field, in particular to filter assembly structure.

Background

The prior CPL polarizer (with the English name of Circular-Polarizing Filters) and the adjustable ND filter (the ND filter is also called Neutral gray Density filter with the English name of Neutral Density filter) are all independent Circular Filters, and the combination of the CPL polarizer and the adjustable ND filter is also Circular, most of the CPL polarizer and the adjustable ND filter are directly arranged on a lens or arranged on the lens through an adapter ring, and the lens with the specified caliber is required to be provided with the filter with the specified caliber, and the use method of the filter is single and limited. In the existing filter assembly structure, other types of filters, such as square filters (in a rectangular shape), are mounted on a filter support, and the filter support is mounted on a lens through an adapter ring. The existing circular CPL polarizer, the adjustable ND filter (neutral grey density mirror), the adjustable ND filter and the CPL polarizer can not be directly installed at the front end of the square filter bracket, and the CPL polarizer can be installed at the front end of the filter bracket only by installing specific bracket accessories, so that the installation process is complicated, the time spent is long, and inconvenience is brought to a user. After the specific bracket accessories are installed, the whole thickness of the square filter bracket is increased, so that a dark angle is easily generated when the wide-angle lens is used, the filter and the filter cannot be attached seamlessly, light leakage is easily generated, and a lot of adverse effects are easily generated when the filter bracket is matched with other filters for use.

The prior product also has some CPL polarizers or ND filters which are inserted in the rear end of the filter bracket. In this case, the rear end of the filter holder needs to be specially provided with an insertion slot capable of accommodating the CPL polarizer or the ND filter, which undoubtedly increases the thickness of the filter holder and easily generates a dark angle when using the wide-angle lens. When photographic accessories such as a CPL polarizer are used for plug-in mounting, if the sky is dark, a user needs to carefully align the slot to insert the slot, and the installation is still inconvenient.

In the process of shooting a landscape, a square filter needs to be used many times, and the square filter needs to be installed on a square filter support. When the photographer needs to use the ND filter and the square gradient layer mirror, it is more convenient if the photographer needs to slow down the shutter by using the adjustable ND filter, because the photographer can adjust the dimming level number needed by the photographer according to the environment, which is more convenient than the single-piece ND mirror. The photographer does not need to take more filters to shoot, and the cost is saved, and the extra time spent on replacing the filters is saved. The square gradient mirror can balance the contrast between sky and ground light, and the square gradient mirror needs to move up and down to achieve perfect composition, so that the square filter support can be perfectly used, and a lot of adverse effects can be brought to shooting if the square gradient mirror and the square filter support cannot be used simultaneously when the square gradient mirror and the square filter support are used in a mixed mode.

Disclosure of Invention

The utility model discloses an overcome above-mentioned prior art at least a defect, provide a filter assembly structure, its simple structure, convenient to use. This filter assembly structure installs CPL polarizer subassembly directly or indirectly in filter support front end and other filters (for example with square filter) collocation, realizes filter assembly structure's multi-functional use to obtain better shooting effect. The utility model discloses a filter assembly structure overall structure is more compact, avoids producing the vignetting when using wide-angle camera lens to can prevent the light leak problem from appearing, CPL polarizer assembly's installation is simple and convenient more in addition. A square filter is a general name in the art, and a square filter is a filter which is square (i.e. rectangular) as a whole.

In order to solve the technical problem, the utility model discloses a technical scheme is:

a filter assembly structure comprises a filter bracket and a square filter, wherein the square filter can be arranged on the filter bracket in a magnetic attraction manner; the CPL polarizer assembly comprises a CPL lens base and a CPL polarizer, the CPL polarizer is rotatably arranged on the CPL lens base, at least one part of the left side edge of the CPL lens base and at least one part of the right side edge of the CPL lens base are vertically arranged, so that the CPL lens base can be in adaptive connection with the front end of the filter support or the square filter, and the CPL polarizer assembly can be connected with the square filter in a magnetic attraction mode.

By adopting the technical scheme, the square filter can be arranged at the front end of the filter bracket in a magnetic attraction manner, and the CPL polarizer component can be connected with the square filter in a magnetic attraction manner, so that the CPL polarizer component and the square filter can be quickly connected while the square filter is arranged, and the matching use of the square filter and the CPL polarizer component is met. The CPL polarizer is rotatably mounted on the CPL lens base, so that the CPL polarizer can be rotatably adjusted relative to the CPL lens base. The CPL polarizer is adjusted in a rotating mode according to needs by a user, so that reflection light is weakened or eliminated, and a better shooting effect is achieved. The utility model discloses a CPL polarizer subassembly that filter assembly structure had, because it can install on the filter support and use with square filter collocation, consequently it with need not match with the camera lens size, have stronger commonality to the user need not prepare not unidimensional CPL polarizer to the camera lens of different sizes, also need not use the switching ring to attach CPL polarizer to the camera lens, saved the cost.

Additionally, the utility model discloses a filter assembly structure's filter support need not add the slot specially for CPL polarizer assembly, can satisfy square filter and CPL polarizer assembly at the quick installation of filter support, can not increase the thickness of filter support again, avoids producing the vignetting when the photography because add the slot. And simultaneously, the utility model discloses a filter assembly structure need not use specific support accessory just can install CPL polarizer subassembly at filter support front end for the whole more compact of filter assembly structure, the structure is simpler, has simplified the installation simultaneously. Compared with a filter assembly structure using a specific bracket accessory, the filter bracket has smaller thickness after being integrated, avoids generating a dark angle when using a wide-angle lens, and simultaneously avoids generating a light leakage problem due to the use of the bracket accessory.

Preferably, a through hole area for installing the CPL polarizer is arranged in a central area of the CPL lens base, the CPL lens base forms a frame around the through hole area, an annular groove is arranged on the frame along the circumferential direction of the through hole area, and the CPL polarizer is embedded into the through hole area and matched with the annular groove so as to be rotatably connected with the CPL lens base. By embedding the CPL polarizer in the through-hole region in cooperation with the annular groove, the CPL polarizer is thus mounted in the CPL lens mount and can rotate along the annular groove, thereby being rotationally adjustable relative to the CPL lens mount.

Preferably, a first magnetic part is arranged in the frame body, a fixed frame is arranged around the square filter, a second magnetic part is arranged in the fixed frame, and the CPL lens base can be connected with the square filter in a magnetic attraction manner. The CPL lens base can be quickly attached to the square filter by utilizing the magnetic attraction between the first magnetic piece and the second magnetic piece. When the CPL polarizer component is matched with the square filter for use, the square filter can be installed on the filter support in a magnetic attraction mode, and then the CPL lens base is attached to the square filter in a magnetic attraction mode, so that the CPL polarizer component, the square filter and the filter support can be sequentially connected, and the matching use of the square filter and the CPL polarizer component is met. Of course, the CPL polarizer assembly may be attached to the square filter first, and then the CPL polarizer assembly and the square filter holder may be attached to the filter holder together.

Preferably, a first magnetic part is arranged in the frame body, the filter support is provided with an installation area for installing a CPL lens base, at least the installation area is made of a material capable of magnetically attracting the first magnetic part, and the CPL lens base can be connected with the filter support in a magnetic attraction manner; the periphery of the square filter is provided with a fixed frame, a second magnetic part is arranged in the fixed frame, the CPL polarizer is provided with an installation part used for installing the square filter, at least one part of the installation part can be magnetically attracted with the second magnetic part, and the CPL polarizer can be connected with the square filter in a magnetic attraction mode.

When the frame body is placed at a position corresponding to the installation area, the CPL lens base can be quickly attached to the filter support by utilizing the magnetic attraction force between the first magnetic piece arranged in the frame body and the installation area, so that the CPL polarizer component is installed on the filter support. The square filter can be mounted to the mounting component of the CPL polarizer using magnetic attraction between the mounting component and the second magnetic piece within the fixed bezel, such that the square filter is indirectly attached to the filter mount through the CPL polarizer assembly.

The first magnetic member is made of a magnetic material, and the magnetic material refers to a substance capable of directly generating magnetism, such as a magnet, a rubber magnet or a metal magnet. The utility model discloses a permanent magnet is preferred to first magnetism spare, ensures to use reliable for a long time. The material capable of magnetically attracting the first magnetic member may be a magnetic material, a non-magnetic iron-containing material, or a combination of the two, wherein the non-magnetic iron-containing material generally refers to a material containing more than 40% of iron elements, such as stainless iron, steel, iron plate, and the like. The second magnetic part can also be made of a magnetic material, a non-magnetic iron-containing material or a combination of the magnetic material and the non-magnetic iron-containing material as long as the magnetic attraction with the first magnetic part is satisfied.

Preferably, the installation component includes a ring body and a third magnetic part capable of magnetically attracting the second magnetic part, the CPL polarizer is provided with a second annular groove, the ring body is embedded in the second annular groove, and the third magnetic part is fixedly connected with the ring body. When the square filter is installed, the fixed frame is arranged at the position corresponding to the second magnetic piece, and the square filter can be easily installed on the installation part by utilizing the magnetic attraction force between the second magnetic piece and the third magnetic piece.

Preferably, the mounting part further comprises limiting parts fixed to two sides of the ring body, the limiting parts are used for limiting the square filter, and the third magnetic part is inserted into the limiting parts. The limiting parts arranged on the two sides of the ring body can limit the square filter between the limiting parts, so that the fixed frame of the square filter is aligned with the third magnetic part to be installed. The limiting component is arranged to avoid the situation that the second magnetic part deviates from the third magnetic part and cannot be firmly installed during installation. In addition, the limiting component can simultaneously avoid the situation that the fixed frame deviates from the third magnetic piece and falls off due to the careless collision of a user after the square filter is installed.

Specifically, the retainer component is secured to the ring body by fasteners. The limiting part is provided with a first mounting hole, the ring body is provided with a second mounting hole, and the fastener penetrates through the first mounting hole and is inserted into the second mounting hole so as to fix the limiting part to the ring body. The fastener can be a screw, the second mounting hole is a threaded through hole or a threaded blind hole, and the screw penetrates through the first mounting hole and is in threaded connection with the second mounting hole. The limiting part is provided with a slot, and the second magnetic piece is provided with an inserting part which can be inserted into the slot. The second magnetic member is fixed to the position restricting part by inserting the insertion part into the slot.

Preferably, the CPL polarizer assembly further includes an adjustable ND filter, the CPL polarizer is provided with an annular mounting groove for mounting the adjustable ND filter, and the adjustable ND filter can be embedded into the annular mounting groove to be rotatably connected with the CPL polarizer. In use, the adjustable ND filter is rotationally adjustable relative to the CPL polarizer. Because the CPL polarizer can be rotationally adjusted relative to the CPL lens base, a user can rotationally adjust the CPL polarizer according to needs. When the adjustable ND filter and the CPL polarizer need to be adjusted, the adjustable ND filter and the CPL polarizer may be rotated together relative to the CPL lens base, or the adjustable ND filter and the CPL polarizer may be rotated respectively. When only the adjustable ND filter needs to be adjusted, only the adjustable ND filter can be rotated without rotating the CPL polarizer. When only the CPL polarizer needs to be adjusted, the adjustable ND filter can be kept still and the CPL polarizer can be rotated.

The CPL polarizer component can simultaneously have the optical functions of both the CPL polarizer and the adjustable ND filter by arranging the adjustable ND filter on the CPL polarizer. A photographer can meet two shooting requirements of prolonging exposure time and eliminating/enhancing high reflection at the same time only by mounting the CPL polarizer assembly once. Compared with the method that the CPL polarizer and the adjustable ND filter are separately carried or installed, the CPL polarizer assembly with the CPL polarizer and the adjustable ND filter is easier to carry and store, the installation times are reduced, and the probability of pollution of the lens by environmental particles is reduced.

Preferably, the CPL polarizer includes a circular CPL lens and an annular CPL frame disposed around the periphery of the circular CPL lens, and the adjustable ND filter includes a circular ND lens and an annular ND frame disposed around the periphery of the circular ND lens, the annular CPL frame being provided with the annular mounting groove. The annular CPL frame and the annular ND frame are respectively provided with a tooth-shaped structure at the peripheral edge, and the tooth-shaped structures are used for increasing the friction between the hands of a user and the annular CPL frame or the annular ND frame and preventing slipping when the user manually adjusts the CPL polarizer or the adjustable ND filter. The CPL polarizer can be rotationally adjusted by rotating the annular CPL mirror frame. Similarly, the adjustable ND filter can be rotated by the annular ND frame. When the adjustable ND filter only needs to be rotated and adjusted and the CPL polarizer does not need to be adjusted, the annular CPL frame is manually pressed to be kept still, and the annular ND frame is rotated; when the CPL polarizer only needs to be rotationally adjusted and the adjustable ND filter is not needed, the reverse operation is carried out.

Preferably, two sides of the filter support are provided with second limiting parts, the second limiting parts are provided with positioning grooves, and two sides of the CPL lens base are respectively provided with positioning convex parts capable of being embedded with the positioning grooves. The mounting area is located between the second limiting parts on the two sides of the filter support. When the CPL polarizer assembly is mounted on the filter support, the CPL mirror mount may be constrained between the second limiting portions so that the frame may be mounted in alignment with the mounting area. The positioning convex parts at two sides of the CPL lens base are embedded into the positioning grooves of the second limiting parts to position the CPL lens base, so that the CPL lens base is prevented from moving up and down relative to the filter support. In addition, when the square filter is directly attached to the filter support, the second limiting parts can limit the square filter between the second limiting parts, and the fixed frame of the square filter is convenient to align with the installation area to be installed.

Preferably, the depth of the positioning groove is set to be larger than the thickness of the square filter. The depth of the positioning groove is set to be larger than the thickness of the square filter, so that when the square filter is arranged between the filter support and the CPL polarizer assembly, the positioning convex part can still be embedded into the positioning groove, and the CPL polarizer base is prevented from moving up and down relative to the filter support. Thus, when the square filter is arranged between the filter support and the CPL polarizer assembly, even if the square filter moves up and down due to composition requirements in the shooting process, the square filter can be prevented from driving the CPL polarizer assembly to move up and down through the matching between the positioning convex part and the positioning groove.

Preferably, the CPL mirror base is further provided with a light blocking pad, and the light blocking pad is used for blocking a gap between the square filter and the CPL polarizer assembly or a gap between the CPL polarizer assembly and the filter support, so that light leakage is prevented.

Compared with the prior art, the beneficial effects of the utility model are that:

the technical scheme of the utility model, this filter assembly structure allows to directly or indirectly install on the filter support with other filter collocation uses CPL polarizer subassembly, realizes filter assembly structure's multi-functional use to obtain better shooting effect. The filter support of the filter assembly structure does not need to specially add slots for CPL polarizer components, can meet the requirement of quick installation of the square filter and the CPL polarizer components on the filter support, does not increase the thickness of the filter support, and avoids the generation of dark corners during photographing due to the addition of the slots. Meanwhile, the filter assembling structure does not need to use specific bracket accessories to install the CPL polarizer component at the front end of the filter bracket, so that the filter assembling structure is integrally more compact and simpler, and the installation process is simplified. Compared with a filter assembly structure using a specific bracket accessory, the filter bracket has smaller thickness after being integrated, avoids generating a dark angle when using a wide-angle lens, and simultaneously avoids generating a light leakage problem because of using the bracket accessory. Further, the technical scheme of the utility model pass through combined CPL polarizer and adjustable ND filter in the CPL polarizer subassembly to this filter assembly structure can realize CPL polarizer and adjustable ND filter both's optical function.

Drawings

Fig. 1 is a schematic structural view of a filter mounting structure according to embodiment 1 of the present invention in an unassembled state.

Fig. 2 is a schematic diagram of the filter holder and CPL polarizer assembly of fig. 1.

Fig. 3 is a schematic structural diagram of a CPL polarizer assembly according to embodiment 1 of the present invention.

Fig. 4 is a cross-sectional view a-a of the CPL polarizer assembly of fig. 3.

Fig. 5 is an enlarged view of a portion a of fig. 4.

Fig. 6 is a schematic structural diagram of a CPL lens mount according to embodiment 1 of the present invention.

Fig. 7 is an exploded view of a CPL polarizer assembly according to embodiment 1 of the present invention.

Fig. 8 is an exploded view of the mounting member according to embodiment 1 of the present invention.

Fig. 9 is an assembly state diagram of the filter mounting structure according to embodiment 1 of the present invention.

Fig. 10 is a schematic view of another assembly state of the filter mounting structure according to embodiment 1 of the present invention.

Fig. 11 is a schematic structural view of a filter mounting structure according to embodiment 2 of the present invention in an unassembled state.

Fig. 12 is a schematic structural view of an assembled state of a filter mounting structure according to embodiment 2 of the present invention.

Fig. 13 is a schematic structural view of a filter mounting structure according to embodiment 3 of the present invention in an unassembled state.

Fig. 14 is a schematic structural diagram of a CPL polarizer assembly according to embodiment 3 of the present invention.

Fig. 15 is a cross-sectional a-a view of the CPL polarizer assembly of fig. 14.

Fig. 16 is an exploded view of a CPL polarizer assembly according to embodiment 3 of the present invention.

Fig. 17 is a schematic structural diagram of a CPL lens mount according to embodiment 3 of the present invention.

Fig. 18 is an enlarged view of a portion B of fig. 17.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

Example 1

As shown in fig. 1 to 10, a filter assembly structure 100 includes a filter support 200 and a filter 300, the square filter 300 can be installed on the front end of the filter support 200 by magnetic attraction, the filter assembly structure 100 further includes a CPL polarizer assembly 400, the CPL polarizer assembly 400 includes a CPL lens base 410 and a CPL polarizer 420 rotatably installed on the CPL lens base 410, and the CPL polarizer assembly 400 can be connected with the square filter 300 by magnetic attraction. The CPL lens holder 410 is configured to be capable of being connected with the front end of the square filter 300 by means of magnetic attraction.

The central region of the CPL lens holder 410 is provided with a through hole region 411 for installing the CPL polarizer 420, the CPL lens holder 410 forms a frame 412 around the through hole region 411, the frame 412 is provided with an annular groove 413 along the circumference of the through hole region 411, and the CPL polarizer 420 can be embedded into the through hole region 411 and matched with the annular groove 413 so as to be rotatably connected with the CPL lens holder 410. A first magnetic member 414 is disposed in the frame 412 (the first magnetic member 414 in this embodiment is the same as embodiment 3 mentioned below, and refer to fig. 17-18). The periphery of the square filter 300 is provided with a fixed frame 310, a second magnetic member (not shown) is arranged in the fixed frame 310, the front end 200 of the filter support is provided with a mounting area 210, and the mounting area 210 is made of a material capable of being magnetically attracted with the first magnetic member 414. The mounting region 210 of the filter holder 200 is a bar-shaped region located at both sides of the filter holder 200. In the present invention, the first magnetic member 414 is a permanent magnet.

The mounting component 411 includes a ring body 431, a third magnetic component 432 capable of magnetically attracting the second magnetic component, and a limiting component 433 disposed on two sides of the ring body 431, the CPL polarizer 420 is provided with a second annular groove 423 at the front end, the ring body 431 is embedded into the second annular groove 423 to be fixed, the limiting component 433 is fixedly connected with the ring body 431, and the third magnetic component 432 and the limiting component 433 are inserted and fixed to the ring body 431. When the square filter 300 is mounted, the fixed bezel 310 is fixed to the third magnetic member 432 by a magnetic attraction force between the third magnetic member 432 and the second magnetic member inside the fixed bezel 310. The limiting parts 433 arranged at both sides of the ring body 431 can limit the fixed frame 310 between the limiting parts 433 to align with the third magnetic part 432 for installation, thereby avoiding the situation that the fixed frame 310 deviates from the third magnetic part 432 and cannot be firmly installed during installation. In addition, the stopper 433 can also prevent the fixed frame 310 from being deviated from the third magnetic member 432 and falling off due to an accidental collision of the user after the square filter 300 is mounted.

Referring to fig. 3 and 7-8, in particular, the position limiting member 433 is fixed to the ring body 431 by a fastener 434. The stopper part 433 is provided with a first mounting hole 433a, the ring body 431 is provided with a second mounting hole 431a, and the fastener 434 passes through the first mounting hole 433a and is inserted into the second mounting hole 431a to fix the stopper part 433 to the ring body 431. In this embodiment, the fastening member 434 is a screw, and the second mounting hole 432a is a threaded through hole, and the screw is threaded through the first mounting hole 433a and the second mounting hole 431 a. The limiting member 433 is provided with a slot 433b, and the third magnetic member 432 is provided with an insertion part 432b capable of being inserted into the slot 433 b. The third magnetic member 432 is fixed to the position restricting part 433 by inserting the insertion part 432 into the insertion groove 433 b.

The two sides of the filter support 200 are provided with second limiting parts 220, the second limiting parts 220 are provided with positioning grooves 221, and the two sides of the CPL lens base 410 are respectively provided with positioning convex parts 416 capable of being embedded with the positioning grooves 221. The mounting region 210 is located between the second stoppers 220 at both sides of the filter holder 200. When the CPL mirror assembly 410 is mounted on the filter support 200, the CPL mirror mount 410 may be constrained between the second stops 210 so that the frame 412 may be mounted in alignment with the mounting area 210. The positioning protrusions 416 on both sides of the CPL mirror mount 410 are embedded in the positioning grooves 221 of the second limiting portion 220, so that the CPL mirror mount 410 can be positioned, and thus the CPL mirror mount is prevented from moving up and down relative to the filter support 200. In this embodiment, the fixed frame 310 includes a left frame 311, a right frame 312, an upper frame 313 and a lower frame 314, the second magnetic members are disposed in the left frame 311 and the right frame 312, and the first magnetic members 414 are disposed in the left side portion and the right side portion of the frame 412. To facilitate the cooperation between the filter holder 200, the square filter 300 and the CPL polarizer assembly 400, in this embodiment, the first magnetic member 414 is configured to magnetically attract the second magnetic member and the mounting region 210 of the filter holder 200. So configured, different assembly modes are possible when the square filter 300 and the CPL polarizer assembly 400 are mounted to the filter holder 200. In the first mode, the square filter 300 is firstly installed in the installation area of the filter bracket 210 in a magnetic attraction manner, and then the back end of the CPL polarizer component 400 is attached to the square filter 300 by utilizing the magnetic attraction between the square filter 300 and the CPL polarizer component 400; in the second mode, the CPL polarizer assembly 400 is first mounted to the mounting region 210 of the filter bracket 200 in a magnetic attraction manner, and then the square filter 300 is mounted on the mounting part 430 of the CPL polarizer assembly 400 by utilizing the magnetic attraction between the square filter 300 and the CPL polarizer assembly 400.

Referring to fig. 2 and 6, in order to adapt the CPL mirror mount 410 to the square filter support 200 to facilitate the installation of the CPL polarizer assembly, the frame 412 is configured to have a left side 412a, a right side 412c, an upper side 412b, and a lower side 412 d. The middle of the left side 412a and the middle of the right side 412c of the frame 412 form the positioning protrusion 416. The positioning boss 416 is specifically formed in an arc-shaped configuration. The positioning groove 221 of the filter holder 200 is also correspondingly provided as an arc-shaped groove. In this embodiment, the middle of the left side 412a of the frame 412 is an arc structure protruding leftward, and the upper and lower portions of the left side 412a of the frame 412 are substantially vertically disposed; the middle of the right side 412c of the frame 412 is an arc structure protruding rightward, and the upper and lower portions of the right side 412c of the frame are substantially vertically disposed. Of course, in other embodiments, the positioning protrusion 416 may be rectangular, triangular, polygonal or other shapes as long as the positioning protrusion 416 can be inserted into the positioning groove 221 to match with the positioning groove 221. It will be appreciated that in other embodiments, the frame 412 may also be configured to be rectangular, i.e., the left and right sides 412a, 412c are substantially vertically disposed and the upper and lower sides 412b, 412d are horizontally disposed, again to fit the square filter holder 200. In other embodiments, the positioning protrusion 416 may not be formed by the middle of the left side 412a and the middle of the right side 412c, but may be additionally disposed on the left side 412a and the right side 412c, respectively.

In this embodiment, the depth of the positioning groove 221 is set to be larger than the thickness of the square filter 300. Setting the depth of the positioning groove 221 to be greater than the thickness of the square filter 300 facilitates that when the square filter 300 is placed between the filter holder 200 and the CPL polarizer assembly 400, the positioning protrusion 416 can still be embedded in the positioning groove 221 to prevent the CPL mirror mount 410 from moving up and down relative to the filter holder 200. In this way, when the square filter 300 is interposed between the filter holder 200 and the CPL polarizer assembly 400, even if the square filter 300 is moved up and down as required for composition during photographing, the square filter 300 is prevented from moving up and down the CPL polarizer assembly 400 by the cooperation between the positioning protrusions 416 and the positioning grooves 221.

The CPL mirror base 410 is provided with light blocking pads 415 on the upper side and the lower side of the rear end thereof, respectively (the light blocking pads 415 in this embodiment are the same as those in embodiment 3 mentioned below, and refer to fig. 17 to 18), and the light blocking pads 415 are used for blocking the gap between the square filter 300 and the CPL polarizer assembly 400 or the gap between the CPL polarizer assembly 400 and the filter support 200.

Example 2

This embodiment is substantially the same as embodiment 1, except that the number of the square filters 300 is 2 as shown in fig. 11 to 12 (in this embodiment, the same structural parts as embodiment 1 can refer to fig. 1 to 10), and the filter mounting structure is assembled by mounting one of the square filters 300 to the mounting region 210 of the filter holder 200 by magnetic attraction, attaching the back end of the CPL polarizer assembly 400 to the square filter 300 by magnetic attraction between the square filter 300 and the CPL polarizer assembly 400, and mounting the other square filter 300 to the mounting part 430 of the CPL polarizer assembly 400 by magnetic attraction.

Example 3

This embodiment is substantially the same as embodiment 1, as shown in fig. 13 to 18, except that the CPL polarizer 420 of the filter mounting structure is not provided with the mounting member 430, the CPL polarizer assembly 400 further includes an adjustable ND filter 440, the CPL polarizer 420 is provided with an annular mounting groove 424 for mounting the adjustable ND filter 440, the adjustable ND filter 440 can be inserted into the annular mounting groove 424 to be rotatably connected with the CPL polarizer 420, the CPL polarizer 420 includes a circular CPL lens 421, and an annular CPL frame 422 disposed around the outer periphery of the circular CPL lens 421, the adjustable ND filter 440 includes a circular ND lens 441, and an annular ND frame 442 disposed around the outer periphery of the circular CPL lens 441, and the annular CPL frame 422 is provided with the annular mounting groove 424.

The outer peripheries of the annular CPL frame 422 and the annular ND frame 442 respectively form a tooth-shaped structure, and the tooth-shaped structure is used for increasing the friction between the hand of a user and the annular CPL frame 422 or the annular ND frame 442 when the CPL polarizer 420 or the adjustable ND filter 440 is manually adjusted by the user, so as to prevent slipping. The CPL polarizer 420 can be rotationally adjusted by rotating the annular CPL frame 422. Similarly, the adjustable ND filter 440 may be rotated by the annular ND mirror frame 442. When the adjustable ND filter only needs to be rotated and adjusted and the CPL polarizer does not need to be adjusted, the annular CPL frame is manually pressed to be kept still, and the annular ND frame is rotated; when the CPL polarizer only needs to be rotationally adjusted and the adjustable ND filter is not needed, the reverse operation is carried out.

Similar to embodiment 1, in this embodiment, a fixed frame 310 is disposed around the filter 300, a second magnetic member is disposed in the fixed frame 310, the filter support 200 is disposed with an installation region 210 for installing the square filter 300, the installation region 210 is made of a material capable of magnetically attracting the second magnetic member, a through hole region 411 for installing the CPL polarizer 420 is disposed in a central region of the CPL lens base 410, the CPL lens base 410 forms a frame 412 around the through hole region 411, the frame 412 is circumferentially disposed with an annular groove 413 along the through hole region 411, the CPL polarizer 420 can be inserted into the through hole region 411 and matched with the annular groove 413 so as to be rotatably connected with the CPL lens base 410, a first magnetic member 414 is disposed in the frame 412, and the first magnetic member 414 can magnetically attract the second magnetic member. As shown in fig. 17 to 18, the CPL mirror base 410 is provided with light blocking pads 415 on the upper side and the lower side of the rear end, respectively, and the light blocking pads 415 are used for blocking the gap between the square filter 300 and the CPL polarizer assembly 400.

Claims (10)

1. The filter assembling structure (100) comprises a filter support (200) and a square filter (300), wherein the square filter (300) can be installed on the filter support (200) in a magnetic attraction manner, and is characterized by further comprising a CPL polarizer assembly (400), wherein the CPL polarizer assembly (400) comprises a CPL lens base (410) and a CPL polarizer (420), the CPL polarizer (420) is rotatably installed on the CPL lens base (410), at least one part of the left side edge of the CPL lens base (410) and at least one part of the right side edge of the CPL lens base (410) are vertically arranged, so that the CPL lens base (410) can be in adaptive connection with the front end of the filter support (200) or the square filter (300), and the CPL polarizer assembly (400) can be connected with the square filter (300) in a magnetic attraction manner.

2. The filter mounting structure (100) according to claim 1, wherein the CPL lens holder (410) has a central region provided with a through hole region (411) for mounting a CPL polarizer (420), the CPL lens holder (410) forms a frame (412) around the through hole region (411), the frame (412) is provided with an annular groove (413) along the circumference of the through hole region (411), and the CPL polarizer (420) is inserted into the through hole region (411) and matched with the annular groove (413) so as to be rotatably connected with the CPL lens holder (410).

3. The filter mounting structure (100) according to claim 2, wherein a first magnetic member (414) is disposed in the frame (412), a fixed frame (310) is disposed around the square filter (300), a second magnetic member is disposed in the fixed frame (310), and the CPL lens holder (410) can be connected to the square filter (300) by magnetic attraction.

4. The filter mounting structure (100) according to claim 2, wherein a first magnetic member (414) is disposed in the frame (412), a mounting region (210) for mounting a CPL lens holder (410) is disposed at a front end of the filter support (200), at least the mounting region (210) is made of a material capable of magnetically attracting the first magnetic member (414), and the CPL lens holder (410) is connected with the front end of the filter support (200) in a magnetically attracting manner;

the periphery of the square filter (300) is provided with a fixed frame (310), a second magnetic part is arranged in the fixed frame (310), the CPL polarizer (420) is provided with an installation part (430) used for installing the square filter (300), at least one part of the installation part (430) can be magnetically attracted with the second magnetic part, and the CPL polarizer (420) can be connected with the square filter (300) in a magnetic attraction mode.

5. The filter mounting structure (100) of claim 4, wherein the mounting member (430) comprises a ring (431) and a third magnetic member (432) magnetically attracted to the second magnetic member, the CPL polarizer (420) is provided with a second annular groove (423), the ring (431) is embedded in the second annular groove (423), and the third magnetic member (432) is fixedly connected to the ring (431).

6. The filter mounting structure (100) of claim 5, wherein the mounting part (430) further comprises a stopper part (433) fixed to both sides of the ring body (431), the stopper part (433) being used to stopper the square filter (300), and the third magnetic part (432) is inserted into the stopper part (433).

7. The filter mounting structure (100) according to any one of claims 1-6, wherein the CPL polarizer assembly (400) further comprises an adjustable ND filter (440), the CPL polarizer (420) is provided with an annular mounting groove (424) for mounting the adjustable ND filter (440), and the adjustable ND filter (440) can be embedded into the annular mounting groove (424) to be rotatably connected with the CPL polarizer (420).

8. The filter mounting structure (100) according to claim 7, wherein the CPL polarizer (420) comprises a circular CPL lens (421), and an annular CPL frame (422) disposed around an outer circumference of the circular CPL lens (421), the adjustable ND filter (440) comprises a circular ND lens (441), and an annular ND frame (442) disposed around an outer circumference of the circular ND lens (441), the annular CPL frame (422) being provided with the annular mounting groove (424).

9. The filter mounting structure (100) according to any one of claims 1 to 6, wherein a second stopper portion (220) is provided on both sides of the filter holder (200), the second stopper portion (220) is provided with a positioning groove (221), and positioning protrusions (416) capable of fitting with the positioning groove (221) are provided on both sides of the CPL lens holder (410), respectively.

10. The filter mounting structure (100) according to any one of claims 1-6, wherein the CPL mirror mount (410) is further provided with a light barrier pad (415), the light barrier pad (415) being configured to block a gap between the square filter (300) and the CPL polarizer assembly (400) or a gap between the CPL polarizer assembly (400) and the filter holder (200).

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