Filter support and filter assembly

Abstract

The utility model relates to a filter support and a filter assembly, the filter support is used for connecting a filter and a shooting device, the filter support comprises a mounting frame and a fixing frame, the mounting frame and the fixing frame are sequentially connected along the axial direction, the end part of the mounting frame far away from the fixing frame is provided with a connecting thread, and the connecting thread is used for connecting the shooting device; the filter support further comprises a fixing piece, the fixing frame comprises a fixing hole, and the fixing hole penetrates through the fixing frame in the radial direction of the fixing frame. The mounting frame is rotationally connected to the fixing frame, and at least part of the fixing piece extends into the fixing hole and fixes the fixing frame to the mounting frame; the fixing frame is connected with a locking piece, and the locking piece synchronously rotates along with the fixing frame; the position of the locking piece can be adjusted by unscrewing the fixing piece, the end of the locking piece is prevented from making contact with the table top, damage to the end of the locking piece due to friction is reduced, and the service life of the locking piece is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of filter brackets, in particular to a filter bracket and a filter component. Background Art

[0002] The filter holder is used to install the filter, and the filter holder is connected to the camera lens assembly through threads, and the filter holder is provided with screws for adjustment. After the filter holder is connected and fixed, the position of the screw is relatively fixed, and the position of the screw may be located below the lens assembly. When the screw is located below the lens assembly, the camera is placed upright on the desktop, and the screw will rub against the desktop, causing the screw to wear and reduce its service life. For example, CN103246037B discloses a multifunctional CPL polarized, adjustable ND filter, Figure 5 As shown in the figure, after the rear lens frame is threadedly connected to the lens assembly of the camera, the locking screw may be located below the lens assembly. When the camera is placed upright on a table, the locking screw will rub against the table, causing wear of the locking screw and a reduction in its service life. Utility Model Content

[0003] The utility model provides a filter bracket and a filter assembly to solve the problem that when the screw is located below the lens assembly and the camera is placed upright on a desktop, the screw will rub against the desktop, causing the screw to be worn and the service life to be reduced.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A filter holder, used to connect a filter to a photographing device, the filter holder comprising a mounting frame and a fixing frame, wherein the mounting frame and the fixing frame are sequentially connected along an axial direction, and a connecting thread is provided at an end of the mounting frame away from the fixing frame, and the connecting thread is used to connect the photographing device;

[0006] The filter holder further comprises a fixing member, the fixing frame comprises a fixing hole, and the fixing hole penetrates the fixing frame in a radial direction of the fixing frame;

[0007] The installation frame is rotatably connected to the fixing frame, and at least a portion of the fixing member extends into the fixing hole and fixes the fixing frame to the installation frame;

[0008] The fixing frame is connected with a locking piece, and the locking piece rotates synchronously with the fixing frame.

[0009] In one embodiment, the end of the installation frame close to the fixed frame is inserted into the fixed frame and an annular groove is provided on its outer surface. The annular groove is continuously provided along the circumference of the installation frame, and the end of the fixing member is received in the annular groove.

[0010] In one embodiment, the number of the fixing members is at least two and they are arranged at intervals along the circumference of the fixing frame, the number and positions of the fixing holes correspond to the number and positions of the fixing members, two of the fixing members are respectively connected to two of the fixing holes, one of the two fixing members is fixedly connected, and the other is movably connected.

[0011] The utility model also provides a filter assembly, comprising at least one filter and the filter bracket mentioned above, wherein the filter is installed on the fixing frame.

[0012] In one embodiment, the filter includes a containing frame and a filter sheet, the containing frame is used to contain the filter sheet and the containing frame is coaxially arranged with the fixed frame; the containing frame is connected to the locking member, the locking member fixes the containing frame to the fixed frame, the containing frame is provided with a stepped hole, the stepped hole includes at least two through holes, at least two of the through holes are axially enlarged successively from the containing frame toward the side away from the fixed frame, and the filter sheet is contained in the through hole close to the fixed frame.

[0013] In one embodiment, the installation frame is provided with a first magnet, and the containing frame is provided with a second magnet magnetically attracted to the first magnet.

[0014] In one embodiment, the two through holes are defined as a first through hole and a second through hole, the radial dimension of the first through hole is smaller than the radial dimension of the second through hole, an inner wall of the first through hole is provided with an internal threaded hole, the radial dimension of the internal threaded hole is larger than the radial dimension of the first through hole and smaller than the radial dimension of the second through hole, and the internal threaded hole is located between the first through hole and the second through hole, the filter also includes a limit frame, the outer surface of the limit frame is provided with an external thread matching the internal threaded hole, the edge of the filter sheet is received in the limit frame and the fixed frame and respectively abuts against the limit frame and the fixed frame.

[0015] In one embodiment, a mounting groove is provided on the stepped surface between the internal threaded hole and the first through hole, the second magnet is accommodated in the mounting groove, and the filter sheet is respectively in contact with the second magnet and the limiting frame.

[0016] In one embodiment, the number of the filters is at least multiple, the multiple filters are stacked axially, and the accommodating frame in at least the filter close to the fixing frame is also connected with the locking member, and the locking member fixes two adjacent accommodating frames.

[0017] In one of the embodiments, at least one of the outer surface of the fixing frame and the outer surface of the accommodating frame is provided with an anti-slip texture, and the anti-slip texture includes a plurality of axially extending grooves, and the plurality of grooves are arranged at intervals along the circumference of the fixing frame.

[0018] It can be seen from the above technical solutions that the embodiments of the utility model have at least the following advantages and positive effects:

[0019] The utility model provides a filter holder and a filter assembly. Since the mounting frame is rotatably connected to the fixed frame, when the screw is located below the lens assembly, the user loosens the fixing member, and the fixing member releases the rotation restriction on the mounting frame and the fixed frame. Under the action of external force, the fixed frame rotates relative to the mounting frame to adjust the position of the locking member, so that when the camera is placed upright on the desktop, the end of the locking member will not contact the desktop, avoiding the end of the locking member from being damaged by friction, and improving the service life of the locking member. When adjusting the position of the locking member, the fixed frame can rotate synchronously without driving the filter, that is, the position adjustment of the locking member can be done without affecting the adjusted filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of the filter holder and the filter in the first embodiment of the utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the filter holder and the filter shown;

[0023] Figure 3 for Figure 2 A schematic cross-sectional structure diagram of the installation frame shown;

[0024] Figure 4 for Figure 2 A schematic cross-sectional structure diagram of the fixing frame shown;

[0025] Figure 5 This is a schematic cross-sectional structure diagram of a fixing frame in the second embodiment of the utility model;

[0026] Figure 6 This is a schematic cross-sectional structure diagram of the installation frame in the second embodiment of the utility model;

[0027] Figure 7This is a schematic diagram of the overall structure of the filter assembly in the second embodiment of the utility model;

[0028] Figure 8 for Figure 7 A schematic cross-sectional structure diagram of the filter assembly shown;

[0029] Fig. 9 for Figure 8 A schematic diagram of the enlarged structure of the local area shown;

[0030] Fig.10 for Figure 8 A schematic cross-sectional structure diagram of the containing frame shown;

[0031] Fig.11 for Figure 8 Schematic diagram of the cross-sectional structure of the limit frame shown.

[0032] The following are the descriptions of the reference numerals:

[0033] 1. Filter holder; 2. Filter assembly; 3. Filter;

[0034] 10. Installation frame; 11. Fixing frame; 12. Fixing member; 13. Accommodating frame; 14. Filter sheet; 18. First magnet; 19. Second magnet; 20. Limiting frame;

[0035] 100, connecting thread; 101, annular groove; 102, storage groove; 103, fixing hole; 104, locking piece; 105, first connecting hole; 106, mounting groove; 107, second connecting hole; 108, third connecting hole; 109, stepped hole; 110, anti-slip texture; 111, groove; 112, through hole; 113, first through hole; 114, second through hole; 115, internal threaded hole; 116, fourth connecting hole; 117, fifth connecting hole. DETAILED DESCRIPTION

[0036] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] First embodiment

[0040] refer to Figure 1 The utility model provides a filter holder 1, which is used to connect a filter and a shooting device. The filter holder 1 is installed on a lens assembly of the shooting device, and the filter can improve the imaging quality of the shooting device. The shooting device can be, but is not limited to, a camera, a video camera, a smart phone, etc.

[0041] refer to Figure 2 and Figure 3 The filter holder 1 includes a mounting frame 10 and a fixed frame 11 connected in sequence along the axial direction. The mounting frame 10 is rotatably connected to the fixed frame 11, and the end of the mounting frame 10 away from the fixed frame 11 is provided with a connecting thread 100. The mounting frame 10 is threadedly connected to the lens assembly through the connecting thread 100. The end of the fixed frame 11 away from the mounting frame 10 is rotatably connected to the filter. The mounting frame 10 and the fixed frame 11 are both hollow structures. The light passes through the filter, the fixed frame 11 and the mounting frame 10 in sequence and is projected onto the lens assembly. Among them, the mounting frame 10 and the fixed frame 11 are both cylindrical, and the radial dimensions of the outer contour of the mounting frame 10 and the radial dimensions of the outer contour of the fixed frame 11 are convenient for the hand to hold the filter holder 1. It can be understood that the outer structure of the mounting frame 10 and the fixed frame 11 can also be other types, such as a cube, a cuboid, an ellipse, etc.

[0042] It should be noted that the connecting thread 100 here is an external thread. It can be understood that in other embodiments, the connecting thread 100 may also be an internal thread.

[0043] The installation frame 10 is internally sleeved in the fixed frame 11 to be rotatably connected with the fixed frame 11. In other embodiments, the installation frame 10 can also be externally sleeved on the fixed frame 11. In one embodiment, the outer surface of the installation frame 10 is provided with a radial annular groove 101, which is located at the end of the installation frame 10 close to the fixed frame 11, and the annular groove 101 is continuously provided along the circumference of the installation frame 10.

[0044] refer to Figure 4The fixing frame 11 is provided with a fixing hole 103, and the fixing hole 103 penetrates the fixing frame 11 along the radial direction of the fixing frame 11. In one embodiment, the filter holder 1 further includes a fixing member 12, and at least a part of the fixing member 12 extends into the fixing hole 103 and fixes the fixing frame 11 to the mounting frame 10. Specifically, the fixing member 12 is threadedly connected to the fixing hole 103 and its end is received in the annular groove 101. When the fixing member 12 is tightened, the end of the fixing member 12 abuts against the bottom of the annular groove 101, limiting the rotation of the fixing frame 11 relative to the mounting frame 10. When the fixing member 12 is loosened, the end of the fixing member 12 reduces or releases the abutment degree with the bottom of the annular groove 101, and the fixing frame 11 rotates relative to the mounting frame 10.

[0045] It should be noted that the number of the fixing members 12 is at least two and they are arranged at intervals along the circumference of the fixing frame 11. The number and position of the fixing holes 103 correspond to the number and position of the fixing members 12. The two fixing members 12 are respectively connected to the two fixing holes 103. One of the two fixing members 12 is fixedly connected, and the other is movably connected. The fixedly connected fixing member 12 cannot be twisted and will not abut against the bottom of the annular groove 101. The fixedly connected fixing member 12 only plays a connecting role, limiting the fixing frame 11 from axially separating from the mounting frame 11. The movably connected fixing member 12 can be loosened and tightened to limit the rotation of the fixing frame 11 relative to the mounting frame 10 or release the rotation restriction of the fixing frame 11 and the mounting frame 10, playing a regulating role, and the movably connected fixing member 12 has both a connecting role and a regulating role. It can be understood that in other embodiments, the fixedly connected fixing member 12 can be omitted, and the movably connected fixing member 12 can be retained. In this case, the number of the fixing members 12 is single. Or the number of the fixing members 12 is multiple, in this case, the fixedly connected fixing members 12 are multiple, and the movably connected fixing members 12 are multiple.

[0046] Continue to refer Figure 2 The fixing frame 11 is connected with a locking member 104, which fixes the filter on the fixing frame 11, and when the fixing frame 11 rotates, the locking member 104 also rotates synchronously with the fixing frame 11. Specifically, the locking member 104 is threadedly connected to the fixing frame 11 along the radial direction of the fixing frame 11, and the locking member 104 can be tightened and loosened. When the locking member 104 is tightened, the end of the locking member 104 abuts against the outer wall of the filter, restricting the filter from rotating relative to the fixing frame 11 and restricting the filter from axially separating from the fixing frame 11. When the locking member 104 is loosened, the locking member 104 reduces or releases the abutment degree with the filter, thereby releasing the restriction on the filter.

[0047] Continue to refer Figure 4The fixed frame 11 is provided with a first connecting hole 105, a second connecting hole 107 and a third connecting hole 108 which increase in sequence along the axial direction. The radial dimension of the first connecting hole 105 is smaller than the radial dimension of the second connecting hole 107 and the radial dimension of the third connecting hole 108. The radial dimension of the second connecting hole 107 is larger than the radial dimension of the first connecting hole 105 and smaller than the radial dimension of the third connecting hole 108. The mounting frame 10 is internally sleeved in the first connecting hole 105, and the filter is internally sleeved in the third connecting hole 108.

[0048] Second embodiment

[0049] refer to Figure 5 The structure of the filter holder 1 in the second embodiment is substantially the same as that of the filter holder 1 in the first embodiment, except that the radial dimensions of the first connecting hole 105 and the third connecting hole 108 are the same and larger than the radial dimension of the second connecting hole 107 .

[0050] refer to Figure 6 In one embodiment, the end of the installation frame 10 is provided with an axial receiving groove 102, the receiving groove 102 is located at the end of the installation frame 10 close to the fixed frame 11, and the receiving groove 102 is continuously arranged along the circumference of the installation frame 10, and the depth direction of the receiving groove 102 is the same as the depth direction of the annular groove 101. It can be understood that in other embodiments, the receiving groove 102 may not be continuously arranged along the circumference.

[0051] Third embodiment

[0052] refer to Figure 7 and Figure 8 The utility model further provides a filter assembly 2, which includes a filter 3 and the filter holder 1 in the second embodiment. It can be understood that in other embodiments, the filter assembly 2 includes a filter 3 and the filter holder 1 in the first embodiment.

[0053] refer to Fig. 9 In one embodiment, the filter 3 includes a receiving frame 13 and a filter sheet 14. The receiving frame 13 is used to receive the filter sheet 14, and the receiving frame 13 is coaxially arranged with the fixing frame 11. A locking member 104 is connected to the receiving frame 13. The receiving frame 13 is a hollow structure. The end of the receiving frame 13 is received in the third connecting hole 108. The locking member 104 fixes the receiving frame 13 to the fixing frame 11, and the filter sheet 14 is received in the receiving frame 13. The filter sheet 14 can be a UV filter, a polarizing filter, a PL filter, a color filter, or a multi-image filter.

[0054] refer to Fig.10In one embodiment, the accommodating frame 13 is provided with a stepped hole 109, and the stepped hole 109 includes at least two through holes 112, and the at least two through holes 112 are successively enlarged along the axial direction from the accommodating frame 13 toward the side away from the fixing frame 11, and the filter sheet 14 is accommodated in the through hole 112 close to the fixing frame 11. For the convenience of understanding, the two through holes 112 are defined as a first through hole 113 and a second through hole 114, respectively, the radial dimension of the first through hole 113 is smaller than the radial dimension of the second through hole 114, and the filter sheet 14 is accommodated in the first through hole 113.

[0055] Among them, since the filter sheet 14 is accommodated on the through hole 112 close to the fixing frame 11, there is an escape space above the filter sheet 14, so that when the filter 3 is turned upside down on the table, the filter sheet 14 will not directly contact the table, which plays a protective role for the filter sheet 14.

[0056] It should be noted that, in other embodiments, the number of filter sheets 14 can be multiple, and the number of filter sheets 14 corresponds to the number of through holes 112 on the stepped hole 109, and the multiple filter sheets 14 can be respectively accommodated in the multiple through holes. Alternatively, the stepped hole 109 includes multiple through holes 112, and the number of filter sheets 14 is also multiple and is respectively accommodated in the multiple through holes 112.

[0057] refer to Fig. 9 and Fig.10 In one embodiment, the inner wall of the first through hole 113 is provided with an internal thread hole 115, the radial dimension of the internal thread hole 115 is larger than the radial dimension of the first through hole 113 and smaller than the radial dimension of the second through hole 114, and the internal thread hole 115 is located between the first through hole 113 and the second through hole 114. In one embodiment, the filter 3 further includes a limit frame 20, the limit frame 20 is a hollow structure, the outer surface of the limit frame 20 is provided with an external thread that matches the internal thread hole 115 to connect with the accommodating frame 13, the limit frame 20 limits the filter sheet 14 between the limit frame 20 and the accommodating frame 13, at this time, the edge of the filter sheet 14 is received between the limit frame 20 and the fixed frame 11 and abuts against the limit frame 20 and the fixed frame respectively. Since the limit frame 20 is detachably connected, it is convenient to replace the filter sheet 14. Among them, the number of the limit frames 20 corresponds to the number of the accommodating frames 13.

[0058] It is understandable that in other embodiments, the limiting frame 20 may be omitted, and the edge of the filter sheet 14 may be snapped onto the hole wall of the first through hole 113 , or the edge of the filter sheet 14 may be embedded into the hole wall of the first through hole 113 .

[0059] refer to Fig.11In one embodiment, the limiting frame 20 is provided with a fourth connection hole 116 and a fifth connection hole 117 in sequence along the axial direction, and the radial dimension of the fourth connection hole 116 is greater than the radial dimension of the fifth connection hole 117 and is stepped. When the limiting frame 20 is connected to the accommodating frame 13, the edge of the filter sheet 14 is received in the fourth connection hole 116 and is located between the limiting frame 20 and the accommodating frame 13, and the filter sheet 14 covers the fifth connection hole 117.

[0060] Continue to refer Fig. 9 In order to make the accommodating frame 13 more firmly installed, in one embodiment, the installation frame 10 is provided with a first magnet 18, and the first magnet 18 is located at the end of the installation frame 10 close to the fixed frame 11, and the accommodating frame 13 is provided with a second magnet 19 that is magnetically attracted to the first magnet 18, and the second magnet 19 is located at the end of the accommodating frame 13 close to the fixed frame 11. The accommodating frame 13 is installed more firmly under the dual action of the first magnetic pole, the second magnet 19 and the locking member 104. It can be understood that in other embodiments, the first magnet 18 and the second magnet 19 can be omitted. Among them, the first magnet 18 and the second magnet 19 are both surrounded by the first through hole 113 and are continuously arranged along the circumference of the fixed frame 11.

[0061] It should be noted that the circumferentially continuous arrangement here can be understood as the first magnet 18 being a circumferentially continuous annular body, or it can also be understood as the first magnet 18 being multiple, and the multiple first magnets 18 are arranged at intervals along the circumference of the fixed frame 11, and the second magnet 19 is arranged similarly. It can be understood that in other embodiments, the first magnet 18 and the second magnet 19 may not be circumferentially continuous.

[0062] It should be noted that the first magnet 18 is accommodated in the receiving groove 102 to accommodate the first magnet 18. It is understandable that in other embodiments, the receiving groove 102 can be omitted, and the first magnet 18 is embedded in the installation frame 10.

[0063] Continue to refer Fig.10 In one embodiment, a mounting groove 106 is provided on the stepped surface between the internal threaded hole 115 and the first through hole 113, and the second magnet 19 is accommodated in the mounting groove 106. When the filter sheet 14 is installed in the first through hole 113, the filter sheet 14 abuts against the second magnet 19 and the limit frame 20 respectively, fixing the second magnet 19 in the mounting groove 106.

[0064] It should be noted that, since the second magnet 19 is continuously arranged circumferentially, the mounting groove 106 is also arranged in the same way. When the second magnet 19 is not continuously arranged circumferentially, the mounting groove 106 is also arranged in the same way. It is understood that in other embodiments, the mounting groove 106 can be omitted, and the second magnet 19 can be embedded in the accommodating frame 13.

[0065] It should be noted that, since the first magnets 18 are continuously arranged in the circumferential direction, the receiving grooves 102 are also arranged in the same manner. When the first magnets 18 are not continuously arranged in the circumferential direction, the receiving grooves 102 are also arranged in the same manner.

[0066] Continue to refer Figure 7 In one embodiment, at least one of the outer surface of the fixing frame 11 and the outer surface of the accommodating frame 13 is provided with an anti-skid texture 110, and the anti-skid texture 110 enhances the surface friction and facilitates the user's hand operation. In one embodiment, the anti-skid texture 110 includes a plurality of axially extending grooves 111, and the plurality of grooves 111 are arranged at intervals along the circumference of the fixing frame 11.

[0067] It should be noted that the number of the above-mentioned filters 3 is at least two, and the multiple filters 3 are stacked in the axial direction. Among the multiple filters 3, at least the containing frame 13 in the filter 3 close to the fixing frame 11 is also provided with a locking member 104, and the locking member 104 fixes two adjacent containing frames 13. In other filters 3 not provided with the locking member 104, the two adjacent containing frames 13 are magnetically fixed by the second magnets 19 arranged with each other. Since they are fixed by the second magnets 19 arranged with each other, it is convenient to disassemble and install.

[0068] It should be noted that, when two adjacent accommodating frames 13 are stacked, an end portion of one of the two accommodating frames 13 is accommodated in the third connecting hole 108 of the other one.

[0069] In summary, in the present application, since the mounting frame 10 is rotatably connected to the fixed frame 11, when the screw 17 is located below the lens assembly, the user loosens the fixing member 12, and the fixing member 12 releases the rotation restriction on the mounting frame 10 and the fixed frame 11. Under the action of external force, the fixed frame 11 rotates relative to the mounting frame 10 to adjust the position of the locking member 104, so that when the camera is placed upright on the desktop, the end of the locking member 104 will not contact the desktop, avoiding the end of the locking member 104 from being damaged by friction, thereby increasing the service life of the locking member 104. In addition, when adjusting the position of the locking member 104, the fixed frame 11 may not drive the filter 3 to rotate synchronously, that is, the position adjustment of the locking member 104 may not affect the adjusted filter.

[0070] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A filter holder for connecting a filter to a photographing device, characterized in that: It comprises a mounting frame and a fixing frame, wherein the mounting frame and the fixing frame are sequentially connected along the axial direction, and a connecting thread is provided at an end of the mounting frame away from the fixing frame, and the connecting thread is used to connect the shooting device; The filter holder further comprises a fixing member, the fixing frame comprises a fixing hole, and the fixing hole penetrates the fixing frame in a radial direction of the fixing frame; The installation frame is rotatably connected to the fixing frame, and at least a portion of the fixing member extends into the fixing hole and fixes the fixing frame to the installation frame; The fixing frame is connected with a locking piece, and the locking piece rotates synchronously with the fixing frame.

2. The filter holder according to claim 1, characterized in that: The end of the installation frame close to the fixing frame is sleeved in the fixing frame and an annular groove is arranged on its outer surface. The annular groove is continuously arranged along the circumference of the installation frame, and the end of the fixing piece is received in the annular groove.

3. The filter holder according to claim 2, characterized in that: The number of the fixing members is at least two and they are arranged at intervals along the circumference of the fixing frame. The number and positions of the fixing holes correspond to the number and positions of the fixing members. Two fixing members are respectively connected to two fixing holes. One of the two fixing members is fixedly connected, and the other is movably connected.

4. A filter assembly, characterized in that: The invention comprises at least one filter and a filter holder according to any one of claims 1 to 3, wherein the filter is mounted on the fixing frame.

5. The filter assembly according to claim 4, characterized in that: The filter includes a containing frame and a filter sheet, the containing frame is used to contain the filter sheet and the containing frame is coaxially arranged with the fixed frame; the containing frame is connected with the locking member, the locking member fixes the containing frame to the fixed frame, the containing frame is provided with a stepped hole, the stepped hole includes at least two through holes, at least two of the through holes are axially enlarged successively from the containing frame toward the side away from the fixed frame, and the filter sheet is contained in the through hole close to the fixed frame.

6. The filter assembly according to claim 5, characterized in that: The installation frame is provided with a first magnet, and the accommodation frame is provided with a second magnet magnetically attracted to the first magnet.

7. The filter assembly according to claim 6, characterized in that: The two through holes are defined as a first through hole and a second through hole, the radial dimension of the first through hole is smaller than the radial dimension of the second through hole, an inner wall of the first through hole is provided with an internal threaded hole, the radial dimension of the internal threaded hole is larger than the radial dimension of the first through hole and smaller than the radial dimension of the second through hole, and the internal threaded hole is located between the first through hole and the second through hole, the filter also includes a limit frame, the outer surface of the limit frame is provided with an external thread matching the internal threaded hole, the edge of the filter sheet is received in the limit frame and the fixed frame and respectively abuts against the limit frame and the fixed frame.

8. The filter assembly according to claim 7, characterized in that: A mounting groove is provided on the stepped surface between the internal thread hole and the first through hole, the second magnet is accommodated in the mounting groove, and the filter sheet is respectively in contact with the second magnet and the limiting frame.

9. The filter assembly according to claim 6, characterized in that: The number of the filters is at least multiple, and the multiple filters are stacked along the axial direction. At least the containing frame in the filter close to the fixing frame is also connected with the locking member, and the locking member fixes two adjacent containing frames.

10. The filter assembly according to claim 9, characterized in that: At least one of the outer surface of the fixing frame and the outer surface of the accommodating frame is provided with an anti-slip texture, wherein the anti-slip texture comprises a plurality of axially extending grooves, and the plurality of grooves are arranged at intervals along the circumference of the fixing frame.

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