WO2020133258A1

WO2020133258A1 - Filter device and photographing equipment

Info

Publication number: WO2020133258A1
Application number: PCT/CN2018/125007
Authority: WO
Inventors: 高志浩; 王平
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2020-07-02
Also published as: CN112189166A

Abstract

A filter device and a photographing equipment. The filter device of the present invention is used for being provided at a front end of a camera (20); the filter device comprises a mounting base (1) and at least one filter assembly (2); the mounting base (1) is used for being connected at a front end of the camera (20), and the filter assembly (2) is mounted on the mounting base (1) by means of a magnetic adsorption mode. A disassembling and assembling process of the present invention is simple and convenient.

Description

Filter device and shooting equipment

Technical field

The present invention relates to the field of imaging technology, and in particular, to a filter device and photographing equipment.

Background technique

The filter is a commonly used photographic accessory, usually installed in the front of the lens of the camera and other shooting equipment, used to selectively absorb or filter the different wavelength bands of light, thereby improving the picture quality of the photographed work or forming a special visual effect.

At present, there are many types of filters, and in order to install the filter on the front end of the lens, the filter lens is usually provided with a fixing ring on the outside of the lens, and the fixing ring is provided with a thread, so that it can be screwed on the front of the lens to complete Filter fixation.

However, the current filter needs to be screwed to be mounted on or removed from the lens, and the disassembly and assembly process is cumbersome and takes a long time.

Summary of the invention

The invention provides a filter device and shooting equipment, and the disassembly and assembly process is relatively simple.

In one aspect, the present invention provides a filter device for setting at the front end of the lens. The filter device includes a mounting base and at least one filter assembly. The mounting base is used to connect to the front end of the lens. The adsorption method is installed on the installation base.

On the other hand, the present invention provides a shooting device, which includes an image sensor, a lens, and the filter device as described above. The rear end of the lens is opposite to the image sensor, and the filter device is provided at the front end of the lens.

The filter device and the photographing equipment of the present invention are provided at the front end of the lens. The filter device includes a mounting base and at least one filter assembly. The mounting base is used to connect to the front end of the lens. The filter assembly passes The magnetic adsorption method is installed on the installation base. In this way, the disassembly and assembly process of the filter lens in the filter device is simple and convenient, and takes a short time, which can save a lot of photography work time.

BRIEF DESCRIPTION

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, without paying any creative labor, other drawings can be obtained based on these drawings.

1 is a schematic diagram of the appearance of a filter device according to Embodiment 1 of the present invention;

2 is a schematic structural diagram of a filter device according to Embodiment 1 of the present invention;

3 is a schematic structural view of a mounting base provided in Embodiment 1 of the present invention;

FIG. 4 is a partially enlarged schematic view at A in FIG. 3;

FIG. 5 is a schematic structural diagram of a filter assembly provided in Embodiment 1 of the present invention;

FIG. 6 is a partially enlarged schematic view at B in FIG. 5;

7 is a schematic diagram of the distribution of magnetic elements in the filter device provided in Example 1 of the present invention;

8 is a schematic diagram of the connection of the filter device provided in Example 1 of the present invention;

9 is an exploded schematic view of the filter device in FIG. 8;

10 is a schematic cross-sectional view of the filter device in FIG. 8;

FIG. 11 is a partially enlarged schematic view at C in FIG. 8.

Description of reference signs:

1—mounting base; 2, 2a, 2b—filter assembly; 11—light hole; 12—first receiving cavity; 13—first positioning part; 14—external thread; 21—filter fixing ring; 22 —Filter lens; 23—pressure ring; 24-magnetic piece; 25—vertical groove; 211—second positioning part; 212—second receiving cavity; 213—first adapting part; 214—second suitable Matching part; 10-filter device; 20-lens.

detailed description

To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

When shooting equipment such as cameras and camcorders are limited by the ambient light of the shooting environment or need to create a special photographic effect when shooting, they can use filters to let the filter filter the specific wavelength of light to achieve the need to achieve Shooting effect. Specifically, there are many types of filters, such as ultraviolet filters (Ultra Violet (UV)) for filtering ultraviolet rays, and neutral gray filters (Neutral density) for reducing the light intensity to reduce the light flux of the lens. filter, ND) and circular polarizer (CPL) used to realize the polarization of light to reduce the surface reflection of the object.

When the filter is used, it is usually installed in the form of an attachment to the front end of the lens of the shooting device, that is, the end of the lens barrel of the lens away from the image sensor. At this time, when the lens passes through the light, the outside light needs to be filtered by the filter before entering the lens, thereby achieving the filter effect of the filter.

Since the filter usually exists as an attachment to the lens, in order to install the filter firmly on the front end of the lens of the shooting device and facilitate the attachment and detachment of the filter on the lens, the present invention provides a filter device, which can be installed more conveniently Fix on or remove from the lens.

FIG. 1 is a schematic diagram of the filter device according to Embodiment 1 of the present invention. 2 is a schematic structural diagram of a filter device according to Embodiment 1 of the present invention. As shown in FIGS. 1 to 2, the filter device 10 of this embodiment is used to be disposed at the front end of the lens 20. The filter device 10 includes a mounting base 1 and at least one filter assembly 2. The mounting base 1 is used to Connected to the front end of the lens 20, the filter assembly 2 is mounted on the mounting base 1 by magnetic attraction.

Specifically, the mounting base 1 of the filter device 10 is used as a medium for connecting the lens 20 and the filter assembly 2 and can generally be installed in a detachable or non-detachable manner at the front end of the lens 20; the filter assembly 2 includes a filter When the lens 22 and the filter assembly 2 are installed on the mounting base 1, the filter lens 22 will be located in front of the lens 20, so that the lens 20 can be filtered.

In order to install the filter assembly 2 on the mounting base 1, the filter assembly 2 and the mounting base 1 can be connected and installed with each other by magnetic attraction. Among them, at least one of the filter assembly 2 and the mounting base 1 can be made magnetic, and the other can be attracted by the former magnetism, so that the two are relatively fixed and connected. Wherein, the filter assembly 2 or the mounting base 1 is magnetic or attracted by magnetism, either the entire mounting base 1 or the filter assembly 2 is magnetically attracted to each other, or the mounting base 1 or the filter assembly 2 Part of the structure in the magnet attracts each other under the action of magnetism. Specifically, when magnetic adsorption is achieved, magnetic materials can be used to achieve magnetism to adsorb materials that can be magnetically adsorbed, such as iron and nickel.

The number of filter components 2 may be one, or may be more than one. When the number of filter components 2 is multiple, different types or different specifications of filter components 2 may be used to achieve different filtering effects.

Compared with the prior art, where the connection between the filter assembly 2 and the lens 20 is achieved by fixing means such as threads, the filter assembly 2 and the mounting base 1 at the front end of the lens 20 are connected by magnetic attraction in the present invention, so Disassembly is more convenient. In the prior art, the filter assembly 2 needs to be screwed to complete the screwing or unscrewing during assembly and disassembly, and the disassembly and assembly process is laborious and time-consuming. In the present invention, when the filter assembly 2 is mounted on the mounting base 1, it is only necessary to move the filter assembly 2 to the magnetic force range of the mounting base 1, between the filter assembly 2 and the mounting base 1 It will attract itself under the action of magnetic force; when disassembling, because there is no blocking structure between the filter assembly 2 and the mounting base 1, as long as enough force is applied to the filter assembly 2, The filter assembly 2 is detached from the mounting base 1. Therefore, in the present invention, the process of disassembling and assembling the filter assembly 2 is simple and convenient, and takes a short time, which can save a lot of photographing work time.

In order to further introduce the filter device 10 of the present invention, the specific structures and possible connection methods of the components such as the mounting base 1 and the filter assembly 2 in the filter device 10 will be further described in detail below.

Among them, in order to satisfy various different filtering effects of the lens 20, as an optional method, the number of the filter components 2 is at least two, and at least two filter components 2 are sequentially connected along the axial direction of the lens 20 . Since the filter components 2 are all disposed at the front end of the lens 20, before the external light enters the lens 20, it needs to pass through two or more overlapping filter components 2 in order to reach the inside of the lens 20. In this way, the filtering effect of the filter assembly 2 can be superimposed to achieve a variety of different filtering effects or improve the filtering capability. The axial direction of the lens 20 is the optical axis direction of the lens 20. For ease of description, the axial direction is used to refer to the optical axis direction of the lens 20 below.

Exemplarily, when the number of the filter components 2 is more than one, the multiple filter components 2 may include a circular polarizer and a neutral gray-scale filter to reduce the light flux of the lens 20 while reducing Reflected light on the surface of the subject. Alternatively, the plurality of filter assemblies 2 may also include two or more different neutral grayscale filters, so that the light passing through the lens 20 is attenuated to a greater extent to further reduce the light flux.

Since the filter assembly and the mounting base 1 are connected by magnetic adsorption, however, due to the size of the entire filter assembly 2 and the performance of the magnetic material, the magnetic adsorption method can usually only be generated within a short distance Magnetic force. When the number of the filter components 2 is more than one, since a plurality of filter components 2 are sequentially connected along the axial direction of the lens 20, the filter components 2 that are not directly connected to the mounting base 1 may be connected to the mounting base 1 There is a long distance between them. At this time, the magnetic force received by these filter assemblies 2 is small, and it may not be able to overcome the gravity of the filter assembly 2 so that the filter assembly 2 cannot be fixed on the lens 20. Therefore, as an optional embodiment, when there are multiple filter assemblies 2, in at least two filter assemblies 2 of the filter device 10, the filter assembly 2 that is not connected to the mounting base 1 may pass It is mounted on the other filter assembly 2 by magnetic adsorption.

At this time, not only the filter assembly 2 can be connected to the mounting base 1 by magnetic attraction, but also different filter assemblies 2 can be connected to each other by magnetic attraction. At this time, at least one of the plurality of different filter assemblies 2 may be magnetic, and the remaining filter assemblies 2 may be attracted by the filter assembly 2 having magnetism, thereby completing relatively fixing and connecting. Wherein, the filter assembly 2 is made magnetic or attracted by magnetism. The entire filter assembly 2 may be magnetically attracted to each other, or part of the structure of the filter assembly 2 may be attracted to each other under the action of magnetism.

FIG. 3 is a schematic structural diagram of a mounting base provided in Embodiment 1 of the present invention. FIG. 4 is a partially enlarged schematic view at A in FIG. 3. As shown in FIGS. 1 to 4, when the filter base 2 and the lens 20 are connected by the mounting base 1, in order to prevent the structure of the mounting base 1 itself from blocking the light passing through the lens 20, the mounting base 1 may have a smaller The size and structure, or the avoidance structure is provided on the mounting base 1 to allow the lens 20 to transmit light normally. Among them, optionally, the mounting base 1 is provided with a light-passing hole 11 for the lens 20 to pass light.

At this time, the mounting base 1 may have a frame-like or ring-shaped structure and surround a hollow light-through hole 11, and the light passing through the filter assembly 2 can be irradiated into the lens 20 through the light-through hole 11. Generally, in order to match the shape of the lens in the lens 20, the through hole 11 of the mounting base 1 may be generally circular, and the through hole 11 has a sufficiently large inner diameter to avoid blocking the light entering the lens 20 .

When the mounting base 1 and the filter assembly 2 are connected by magnetic adsorption, the magnetic force only provides the attracting force of the mounting base 1 and the filter assembly 2 close to each other. In order to allow the mounting base 1 and the filter assembly 2 to There is no relative movement in other directions. Optionally, a mounting structure may be provided on the mounting base 1 or the filter assembly 2 so that the filter assembly 2 is fixed on the mounting base 1 through the mounting structure. In order to simplify the structure of the filter assembly 2 and reduce the size of the filter assembly 2, the mounting structure is usually provided on the mounting base 1.

As an optional embodiment, a side of the light-through hole 11 facing away from the front end of the lens 20 may form a first accommodating cavity 12, and the first accommodating cavity 12 is used to accommodate at least part of the structure of the filter assembly 2.

Specifically, the side of the first accommodating cavity 12 facing away from the front end of the lens 20 may form an opening, and at least part of the structure of the filter assembly 2 may enter the first accommodating cavity 12 through the opening. The inner wall will limit the filter assembly 2 in the radial direction of the lens 20 so that the filter assembly 2 will not move or move in the radial direction of the lens 20. Wherein, the first accommodating cavity 12 may be an entire structure for accommodating the filter assembly 2 or a part of the structure accommodating the filter assembly 2, and in order to reduce the overall size of the mounting base 1, the first accommodating cavity 12 Only a part of the structure of the filter assembly 2 facing the lens 20 may be accommodated.

In order to form a good limit for the filter assembly 2, the shape of the inner wall of the first accommodating cavity 12 may match the shape of the outer wall of the filter assembly 2. For example, since the outer wall of the filter assembly 2 generally has the shape of a rotator, correspondingly, as an alternative, the first accommodating cavity 12 may have an annular cavity wall, and the filter assembly 2 may be rotatably disposed on the first accommodating cavity. Place in the cavity 12.

At this time, since the filter assembly 2 can rotate in the first accommodating cavity 12, the filter assembly 2 may include a round lens that needs to be rotated, such as a circular polarizer. Among them, the circular polarizer can obtain different polarization angles of light through the rotation of its own lens, so as to achieve different polarization effects. The annular cavity wall of the first accommodating cavity 12 allows the circular polarizer to realize a rotation function therein, thereby adjusting the polarization effect.

In addition, in order to improve the compatibility of the filter device 10, the filter assembly 2 in the filter device 10 can be replaced with the existing conventional filter assembly 2, that is, the mounting base 1 in the present invention can also be used to connect the existing Some filter components 2. At this time, in order to effectively connect the conventional filter assembly 2, optionally, the annular cavity wall of the first accommodating cavity 12 is provided with an internal thread, and the internal thread is used for screwing with the filter assembly 2. The filter assembly 2 connected to the internal thread may be the filter assembly 2 connected to the lens 20 through threads in the prior art. In addition, external threads may be provided on the outer wall of the filter assembly 2 of the present invention, so that the filter assembly 2 can be connected to the mounting base 1 or directly connected to the front end of the existing lens 20 by screwing.

When the filter assembly 2 is partially accommodated in the first accommodating cavity 12, in order to restrict the radial position of the filter assembly 2, optionally, the light-through hole 11 is provided with a protrusion protruding toward the center of the lens 20 The first positioning portion 13 is used to limit the axial position of the filter assembly 2 in the first accommodating cavity 12. Specifically, the projections of the first positioning portion 13 and the filter assembly 2 in the axial direction of the lens 20 overlap each other. Therefore, when the filter assembly 2 moves to a position abutting the first positioning portion, The positioning unit 13 is restricted and cannot continue to move.

Specifically, the first positioning portion 13 may have many different forms and structures. For example, as an optional structure, the first positioning portion 13 may be a positioning step provided on the inner wall of the light passing hole 11. At this time, the inner diameter of the hole section of the through hole 11 connected to the first accommodating cavity 12 will be smaller than the inner diameter of the first accommodating cavity 12, so that at the boundary between the first accommodating cavity 12 and the other hole segments of the through hole 11 At this point, a positioning step is formed due to the difference in inner diameter, and this positioning step can be used to limit the axial position of the filter assembly 2.

The first positioning portion 13 may also be other structures. For example, the first positioning portion may be one or more protrusions provided on the inner wall of the light-through hole 11, and the filter assembly 2 moves to the convexity in the first accommodating cavity 12. When the block abuts, it will be limited by the convex block and cannot continue to move in the axial direction.

In this way, through the mounting structure such as the first positioning portion 13, the mounting base 1 can fix and position the filter assembly 2, so that the filter assembly 2 can be relatively fixed to the lens 20.

When the mounting base 1 is mounted to the front end of the lens 20, the mounting base 1 can be connected by the existing mounting structure at the front end of the lens 20, so that it is suitable for the existing lens 20. However, in the existing lens 20, a screw structure for mounting a conventional filter is usually provided at the front end. Accordingly, as one of the optional embodiments, the side of the mounting base 1 facing the front end of the lens 20 may be The cylindrical outer wall is provided with an external thread 14 for screwing with the front end of the lens 20.

At this time, the size of the cylindrical outer wall will match the size of the front end of the lens 20, so the mounting base 1 can be screwed with the external thread 14 and the screw structure of the front end of the lens 20, and fix the filter device 10 on the lens 20 front end.

In addition, the mounting base 1 can also be connected to the front end of the lens 20 by other means, such as a snap-fit structure, or an interference fit connection, which is not limited herein.

FIG. 5 is a schematic structural diagram of a filter assembly provided in Embodiment 1 of the present invention. FIG. 6 is a partially enlarged schematic view at B in FIG. 5. As shown in FIG. 1 to FIG. 6, in order to perform the normal filtering function while being reliably connected to the mounting base 1, as an optional embodiment, the filter assembly 2 includes a filter fixing ring 21 and The filter lens 22 is fixed on the inner side of the filter fixing ring 21, and the filter fixing ring 21 is used to connect with the mounting base 1 or other filter components by magnetic adsorption.

The filter lens 22 may be a variety of different filter lenses such as an ultraviolet filter, a neutral grayscale filter, and a circular polarizer. Since the filter lens 22 is generally made of materials such as optical glass with a relatively fragile texture, it is not easy to directly install a mounting structure on the filter lens 22. Therefore, the filter assembly 2 further includes a filter fixing ring 21 surrounded by the filter fixing ring 21 On the outside of the filter lens 22, the filter lens 22 can be protected to a certain degree, and at the same time, it is convenient to connect with other components or structures.

When the filter lens 22 is fixed to the filter fixing ring 21, since the filter lens is usually a laminar structure with a relatively simple structure, the filter lens may have a limiting and mounting structure for fixing the lamellar structure. Optionally, a second positioning portion 211 protruding toward the center of the filter fixing ring 21 is provided on the inner wall of the filter fixing ring 21, and the second positioning portion 211 abuts the filter lens 22, so that the filter lens can be restricted 22 in the axial position of the filter fixing ring 21.

Specifically, similar to the first positioning portion 13, the second positioning portion 211 may also have many different structures and types. For example, optionally, the second positioning portion 211 may be a stepped surface provided on the inner wall of the filter fixing ring 21. At this time, different parts of the inner wall of the filter fixing ring 21 in the axial direction will have different inner diameters, thereby forming a stepped surface, and the filter lens 22 may abut on the stepped surface, thereby performing the axial upward movement Fixed.

In addition, the second positioning portion 211 may also be a protrusion provided on the inner wall of the filter fixing ring 21, or other positioning structures commonly used by those skilled in the art, which will not be repeated here.

In addition, since the second positioning portion 211 only limits the filter lens 22 in one direction along the axial direction of the lens 20, the opposite direction of the filter lens 22 is still not limited at this time. Therefore, optionally, the filter assembly 2 may further include a pressing ring 23 disposed on the inner side of the filter fixing ring 21, and the pressing ring 23 is located on a side of the filter lens facing away from the second positioning portion 211, the pressing ring 23 can be used to sandwich the filter lens together with the second positioning portion 211 to fix the axial position of the filter lens.

Wherein, optionally, the shape of the outer edge of the pressing ring 23 matches the shape of the inner wall of the filter fixing ring 21, so that the pressing ring 23 can be fixed on the inner wall of the filter fixing ring 21, and the pressing ring 23 is accommodated in the filter Inside the fixing ring 21, the shape of the filter assembly 2 is relatively simple.

Further, since the size of the pressing ring 23 and the filter fixing ring 21 are relatively small, in order to provide a structure for connecting the pressing ring 23 and the filter fixing ring 21 in a limited space, the outer edge of the pressing ring 23 and The shape of the inner wall of the filter fixing ring 21 is set to a circle, and the relative rotation between the inner walls of the filter ring fixing ring 21 is used to complete the installation or removal between the two. Specifically, the connection between the pressure ring 23 and the filter fixing ring 21 may be completed or disconnected depending on different rotation positions.

For example, in an optional connection method, the outer edge of the pressure ring 23 has an external thread, and the inner edge of the filter fixing ring 21 is provided with an internal thread matching the external thread on the pressure ring 23, the pressure ring 23 The filter fixing ring 21 is screwed with the external thread and the internal thread. When it is necessary to install the pressure ring 23 or remove the pressure ring 23 and the filter lens 22 from the filter fixing ring 21, the external thread on the pressure ring 23 and the internal thread of the filter fixing ring 21 can be screwed Screwing or unscrewing, the pressure ring 23 is attached to or detached from the filter fixing ring 21.

In addition, in other optional connection methods, one or more spaced engagement portions may be provided on the pressure ring 23 and the filter fixing ring 21, and the pressure ring 23 and the filter fixing ring 21 may pass through The connection is completed by rotating and engaging, and the filter lens 22 is sandwiched between the pressing ring 23 and the filter fixing ring 21.

In order to let the filter assembly 2 and the mounting base 1 attract each other by magnetic force. The filter assembly 2 may be magnetic, or the mounting base 1 may be magnetic. In order to facilitate the mutual magnetic adsorption between different filter components 2, the filter component 2 is usually magnetic, and the mounting base 1 can be completed by the magnetic adsorption of the filter component 2 to complete the filter component 2 and the mounting base 1 the connection between.

When the filter assembly 2 generates magnetism, other structures of the filter assembly 2 except the filter lens 22 may be used, for example, the entire filter fixing ring 21 is made of magnetic material, or may be in the filter assembly 2 Part of the structure of the filter fixing ring 21 uses magnetic materials. When a part of the structure of the filter fixing ring 21 is made of magnetic material, as one of the optional structures, the filter assembly 2 includes at least one magnetic member 24, and at least one second accommodating space is provided on the filter fixing ring 21 In the cavity 212, the magnetic member 24 is disposed in the second accommodating cavity 212.

At this time, the magnetic member 24 is disposed in the second accommodating cavity 212, so that the magnetic member 24 can have an appropriate size and a relatively regular shape, so as to ensure that the magnetic member 24 has a reliable magnetic adsorption capability. In addition, the magnetic member 24 is specifically used to generate magnetic force, but not as a load-bearing structure of the filter fixing ring 21, so that the magnetic member 24 does not need to be processed into a complex load-bearing structure, so the manufacturing cost is low.

The magnetic member 24 can be of many different types. Optionally, the magnetic member 24 may be a permanent magnet, such as a magnet or an aluminum-nickel-cobalt alloy, etc. The permanent magnet does not need to be powered to have strong magnetism, so the magnetic member 24 made of the permanent magnet is convenient to use and has a small The external dimensions are suitable for the filter device 10.

When the magnetic member 24 is provided, on the one hand, it is necessary to ensure that the magnetic force of the magnetic member 24 can maximize the magnetic attraction between the mounting base 1 and the filter assembly 2; on the other hand, when there are multiple filter assemblies 2 It is also necessary to allow the different filter assemblies 2 to be connected to each other by the magnetic member 24. Therefore, optionally, the magnetic pole direction of the magnetic member 24 will be along the axial direction of the lens 20. In this way, since the magnetic member 24 has a strong magnetic force in the magnetic pole direction, the magnetic pole direction of the magnetic member 24 is along the axial direction of the lens 20, and the maximum magnetic force direction of the magnetic member 24 can be directed to the mounting base 1 and the filter assembly The connection direction between 2 ensures the reliable connection between the mounting base 1 and the filter assembly 2. In addition, when there are multiple filter assemblies 2, since the magnetic pole directions of the magnetic members 24 are all along the axial direction of the lens 20, the filter assemblies 2 that are sequentially arranged along the axial direction of the lens 20 can also pass through the magnetic member 24 The mutual attraction between the magnetic poles completes the connection. At this time, the magnetic members 24 of the two adjacent filter assemblies 2 will maintain opposite magnetic pole polarities. For example, the N pole of the magnetic member 24 of the previous filter assembly 2 will be the same as the magnetic member 24 of the latter filter assembly 2. S poles are close and opposite.

Optionally, the second accommodating cavity 212 has an opening, and the opening faces the front end of the lens 20. Therefore, the magnetic member 24 can be inserted into the second accommodating cavity 212 through the opening and fixed inside the filter fixing ring 21. The magnetic member 24 can be fixed in the second accommodating cavity 212 in various ways, for example, a fixing structure can be provided on the filter fixing ring 21, or can be inserted into the second accommodating cavity 212 by interference fit. Optionally, the magnetic member 24 may be disposed in the second accommodating cavity 212 through an adhesive. In this way, no additional fixing structure is required, and the structure of the filter fixing ring 21 is relatively simple.

At this time, the opening of the second accommodating cavity 212 may be located on the end surface of the filter fixing ring 21, and the end surface of the filter fixing ring 21 is flat. The magnetic member 24 can be disposed in the second accommodating cavity 212 through the opening on the end surface. Because when the filter assembly 2 is connected to the mounting base 1 or other filter assemblies, the end surface of the filter fixing ring 21 will generally abut the mounting base and other components, and the opening of the second accommodating cavity 212 is provided on the end surface The magnetic pieces 24 all have a relatively close distance from the mounting base 1 to improve the magnetic absorption effect of the filter assembly 2.

When the magnetic member 24 is disposed in the second accommodating cavity 212, in order to prevent the magnetic member 24 from affecting the connection between the filter fixing ring 21 and other components, optionally, the magnetic member 24 may be completely accommodated in the second accommodating cavity Within 212. At this time, the magnetic member 24 does not protrude from the end surface of the filter fixing ring 21, so that the connection of the filter fixing ring 21 and other components will not be hindered, and at the same time, the filter fixing ring 21 has a neat appearance .

As an optional implementation manner, the outer surface of the magnetic member 24 may be flush with the end surface where the opening of the second accommodating cavity 212 is located. In this way, the outer surface of the magnetic member 24 and the end surface of the filter fixing ring 21 are located on the same surface, so the filter assembly 2 has a smoother appearance and better aesthetics. In addition, the outer surface of the magnetic member 24 may be slightly lower than the end surface where the opening of the second accommodating cavity 212 is located, so that the magnetic member 24 is relatively concealed, which can improve the overall aesthetics of the filter assembly 2.

In order to ensure the magnetic adsorption effect between the filter assembly 2 and the mounting base 1, optionally, the magnetic member 24 is located on the side of the filter fixing ring 21 facing the front end of the lens 20. Moreover, the position of the magnetic member 24 is close to the front end of the lens 20 at this time, and the distance to the mounting base 1 is relatively short, which facilitates magnetic attraction with the mounting base 1.

In addition, FIG. 7 is a schematic diagram of the distribution of the magnetic members in the filter device according to Embodiment 1 of the present invention. As shown in FIG. 7, optionally, the number of the magnetic members 24 is multiple, and the multiple magnetic members 24 are spaced along the circumferential direction of the filter fixing ring 21. At this time, different parts of the filter fixing ring 21 in the circumferential direction can achieve the magnetic adsorption effect through the magnetic members 24 at corresponding positions, and the connection between the filter fixing ring 21 and the mounting base 1 is more reliable.

In addition, the magnetic member 24 can also have other optional arrangements, for example, the magnetic member 24 can be an arc-shaped elongated structure, and the magnetic member 24 is arranged along the circumferential direction of the filter fixing ring 21, so as long as less The number of magnetic parts (one or two arc-shaped magnetic parts 24) allows different parts of the filter fixing ring 21 in the circumferential direction to achieve the magnetic adsorption effect through the magnetic parts, ensuring the filter fixing ring 21 and the mounting base 1 Reliable connection.

When there are two or more filter assemblies 2 in the filter device 10, in order to connect the plurality of filter assemblies 2 distributed along the axial direction together, the filter assemblies 2 need to have matching connections structure. As one of the optional connection structures, the end of the filter fixing ring 21 facing away from the front end of the lens 20 has a first adapting portion 213, and the end of the filter fixing ring 21 facing the front end of the lens 20 has a first adapting portion 213 The shape of the second matching portion 214 matches.

At this time, since each filter assembly 2 has the first matching portion 213 and the second matching portion 214 matching each other, the shape between the first matching portion 213 and the second matching portion 214 can be used Match, connect the two filter assemblies 2 back and forth together. The shapes of the first adapting portion 213 and the second adapting portion 214 do not interfere with the connection between the mounting base 1 and the filter assembly 2.

Specifically, FIG. 8 is a schematic diagram of the connection of the filter device provided in Embodiment 1 of the present invention. 9 is an exploded schematic view of the filter device in FIG. 8. 10 is a schematic cross-sectional view of the filter device in FIG. 8. FIG. 11 is a partially enlarged schematic view at C in FIG. 8. As shown in FIGS. 8 to 11, as an optional connection method, when the number of the filter assembly 2 is at least two, of the two filter assemblies 2a and the filter assembly 2b, the previous one along the axis of the lens 20 The second adapting portion 214 of the filter fixing ring 21 of the filter assembly 2a may be correspondingly connected to the first adapting portion 213 of the filter fixing ring 21 of the latter filter assembly 2b. Specifically, the second adapting part 214 and the first adapting part 213 may have a structure capable of cooperating with each other, for example, the two may have complementary shapes.

Optionally, the first adapting portion 213 can be an opening, and the second adapting portion 214 can be inserted into the opening. At this time, since the first adapter portion 213 is located on the side of the filter fixing ring 21 facing away from the front end of the lens 20, even if the size of the first adapter portion 213 is large, it will not affect the filter fixing ring 21 and the installation Connection between bases 1. Since the filter assembly 2 is provided with a magnetic adsorption structure such as a magnetic member 24, the first adaptor 213 and the second adaptor 214 can be attached to the front and rear filter assemblies 2 as long as they are connected by plug-in connection And connected together, the connection process is relatively simple and fast.

In addition, the second adapting portion 214 facing the front end of the lens 20 can be used not only for connecting with other filter components, but also for connecting with the mounting base 1. At this time, the shape and structure of the second adapting part 214 will match with the corresponding structure on the mounting base 1, for example, when the mounting base 1 includes the first accommodating cavity 12, the The shape may match the shape of the opening of the first accommodating cavity 12 so as to be installed in the first accommodating cavity. Correspondingly, the mounting base 1 may also be provided with a structure for avoiding or accommodating the second adapting portion 214. For example, the shape of the opening of the first accommodating cavity 12 of the mounting base 1 may match the outer shape of the second adapting portion 214.

When the number of the filter components 2 is multiple, since the filter components 2 such as polarizers may be used, they may need to rotate around the optical axis of the lens 20, so the different filter components 2 may also be relatively rotatable. To avoid affecting the normal operation of the single filter assembly 2. At this time, in order to achieve relative rotation between the two front and rear filter assemblies 2, optionally, the second adapting part 214 is a revolving body, and the inner wall of the first adapting part 213 is annular. At this time, the second adapting portion 214 inserted inside the first adapting portion 213 can relatively rotate about the axis of the lens 20 and drive the two filter assemblies 2 to relatively rotate. When the two filter assemblies 2 rotate relatively, the filter lens 22 will rotate accordingly and produce different filter effects. For example, when the filter lens is a circular polarizer, the polarization effect on the external light can be changed by the rotation of the filter assembly 2 to achieve different light reflections; and when the filter lens is a neutral gray gradient filter At this time, by rotating the filter lens, the upper and lower positions of the dimming area of the filter lens can be adjusted to achieve different dimming effects.

Wherein, the second adapting portion 214 may be a cylindrical or conical shape, which is relatively simple, and can be easily inserted into or separated from the first adapting portion 213, thereby Improve the disassembly and assembly efficiency of the filter assembly 2.

In addition, the first adapting portion 213 and the second adapting portion 214 may also have other structures and shapes, for example, both the first adapting portion 213 and the second adapting portion 214 may be snap rings, or other components that can meet two adjacent The connection structure between the two filter assemblies 2 and the positioning connection structure will not be repeated here.

In addition, in order to facilitate the rotation of the filter assembly 2, in an alternative embodiment, the outer wall of the filter fixing ring 21 is provided with a non-slip texture to facilitate the user to rotate the filter assembly 2 with his fingers. The anti-slip pattern on the filter fixing ring 21 may be a plurality of vertical grooves 25 along the axial direction of the lens 20, or may be a mesh-shaped anti-slip pattern, etc., or the outer wall of the filter fixing ring 21 may also be set as Non-slip skins or rubber anti-skid layers with matte surfaces are not limited here.

In this embodiment, the filter device is used to be placed at the front end of the lens. The filter device includes a mounting base and at least one filter assembly. The mounting base is used to connect to the front end of the lens. Mount on the base. In this way, the disassembly and assembly process of the filter lens in the filter device is simple and convenient, and takes a short time, which can save a lot of photography work time.

The invention also provides a photographing device, which includes an image sensor, a lens, and the filter device described in the above embodiment. The rear end of the lens is opposite to the image sensor. The filter device is provided at the front end of the lens and is used to enter the lens The light is filtered to achieve a special visual effect. The specific structure, function and working principle of the filter device have been described in detail in the foregoing embodiments, and will not be repeated here.

Specifically, the shooting device generally includes a housing as a main body, the image sensor is accommodated in the housing, and the rear end of the lens can generally be connected to the housing through a bayonet. The front end of the lens is provided with a filter device.

Wherein, the filter device can be detachably connected to the lens, for example, the screw on the mounting base of the filter device is screwed to the front end of the lens. In addition, the filter device can also be connected to the front end of the lens in a non-detachable manner. At this time, optionally, the mounting base of the filter device and the lens may be an integrated structure. In this way, when the lens is produced, the shape and structure of the mounting base are directly formed on the front end of the lens, so that the front end of the lens is directly connected to the filter assembly.

In this embodiment, the shooting equipment includes an image sensor, a lens, and a filter device. The rear end of the lens is opposite to the image sensor, and the filter device is provided at the front end of the lens. The filter device is used to set the front end of the lens. The mirror device includes a mounting base and at least one filter assembly. The mounting base is used to connect to the front end of the lens, and the filter assembly is mounted on the mounting base by magnetic attraction. In this way, the disassembly and assembly process of the filter lens in the shooting device is simple and convenient, and takes a short time, which can save a lot of photography work time.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or replacements do not deviate from the essence of the corresponding technical solutions of the technical solutions of the embodiments of the present invention. range.

Claims

A filter device is provided at the front end of a lens. The filter device includes a mounting base and at least one filter assembly. The mounting base is used to connect to the front end of the lens. The filter assembly is mounted on the mounting base by magnetic absorption.
The filter device according to claim 1, wherein the number of the filter components is at least two, and at least two of the filter components are sequentially connected along the axial direction of the lens.
The filter device according to claim 2, wherein in at least two of the filter assemblies, the filter assembly that is not connected to the mounting base is mounted on the other filter assembly by magnetic adsorption.
The filter device according to any one of claims 1 to 3, wherein at least a part of the structure of the mounting base is magnetic, and at least a part of the structure of the filter assembly is capable of being magnetic by the magnetic member Composed of adsorbed materials; or,

At least part of the structure of the mounting base is made of a material that can be magnetically attracted by the magnetic member, and at least part of the structure in the filter assembly is magnetic.
The filter device according to claim 4, wherein the mounting base is provided with a light-passing hole through which the lens can pass light.
The filter device according to claim 5, wherein a side of the through hole facing away from the front end of the lens forms a first accommodating cavity, and the first accommodating cavity is used to accommodate the filter At least part of the structure of the component.
The filter device according to claim 6, wherein the first accommodating cavity has an annular cavity wall, and the filter assembly is rotatably disposed in the first accommodating cavity.
The filter device according to claim 7, wherein the annular cavity wall is provided with an internal thread, and the internal thread is used for screwing with the filter assembly.
The filter device according to claim 6, wherein a first positioning portion protruding toward the center of the lens is provided in the light-through hole, and the first positioning portion is used to restrict the filter The axial position of the component in the first accommodating cavity.
The filter device according to claim 9, wherein the first positioning portion is a positioning step provided on an inner wall of the light-passing hole.
The filter device according to any one of claims 5 to 10, wherein the side of the mounting base facing the front end of the lens has a cylindrical outer wall, and the cylindrical outer wall is provided with Describe the external thread on the front of the lens.
The filter device according to claim 4, wherein the filter assembly includes a filter fixing ring and a filter lens, the filter lens is fixed inside the filter fixing ring, the filter The fixing ring is used to connect with the mounting base or other filter components by magnetic adsorption.
The filter device according to claim 12, wherein a second positioning portion protruding toward the center of the filter fixing ring is provided on the inner wall of the filter fixing ring, and the second positioning portion is The filter lens abuts to limit the axial position of the filter lens in the filter fixing ring.
The filter device according to claim 13, wherein the second positioning portion is a stepped surface provided on an inner wall of the filter fixing ring.
The filter device according to claim 13, wherein the filter assembly further comprises a pressure ring, the pressure ring is disposed inside the filter fixing ring, and the pressure ring is located in the filter A side of the lens facing away from the second positioning portion, the pressing ring is used to sandwich the filter lens together with the second positioning portion.
The filter device according to claim 15, wherein the shape of the outer edge of the pressing ring matches the shape of the inner wall of the filter fixing ring.
The filter device according to claim 16, wherein the outer edge of the pressing ring and the inner wall of the filter fixing ring are both circular in shape.
The filter device according to claim 17, wherein the outer edge of the pressure ring has an external thread, and the inner edge of the filter fixing ring is provided with a thread matching the external thread on the pressure ring Internal thread, the pressure ring is screwed with the filter fixing ring through the cooperation of the external thread and the internal thread.
The filter device according to any one of claims 12 to 18, wherein the filter assembly includes at least one magnetic member, and at least one second accommodating cavity is opened on the filter fixing ring, The magnetic member is arranged in the second accommodating cavity.
The filter device according to claim 19, wherein the second accommodating cavity has an opening, and the opening faces the front end of the lens.
The filter device according to claim 20, wherein the opening of the second accommodating cavity is located on the end surface of the filter fixing ring, and the end surface of the filter fixing ring is flat.
The filter device according to claim 21, wherein the magnetic member is completely contained in the second accommodating cavity.
The filter device according to claim 22, wherein the outer surface of the magnetic member is flush with the end surface where the opening of the second accommodating cavity is located.
The filter device according to any one of claims 20 to 23, wherein the magnetic member is located on a side of the filter fixing ring facing the front end of the lens.
The filter device according to claim 19, wherein the magnetic member is disposed in the second accommodating cavity through an adhesive.
The filter device according to claim 19, wherein the number of the magnetic members is plural, and the plurality of magnetic members are distributed at intervals in the circumferential direction of the filter fixing ring.
The filter device according to claim 19, wherein the magnetic member is a permanent magnet.
The filter device according to claim 27, wherein the magnetic pole direction of the magnetic member is along the axial direction of the lens.
The filter device according to any one of claims 12 to 18, wherein the filter fixing ring is a magnetic body.
The filter device according to claim 29, wherein the magnetic pole direction of the filter fixing ring is along the axial direction of the lens.
The filter device according to any one of claims 12 to 18, wherein an end of the filter fixing ring facing away from the front end of the lens has a first adapting portion, and the filter fixing ring is oriented toward One end of the front end of the lens has a second adapting part matching the shape of the first adapting part.
The filter device according to claim 31, wherein the number of the filter components is at least two, and in the at least two filter components, the previous filter component along the axis of the lens The second adapting part of the filter fixing ring of is correspondingly connected to the first adapting part of the filter fixing ring of the latter filter assembly.
The filter device according to claim 31, wherein the first adapting portion is an opening, and the second adapting portion can be inserted into the opening.
The filter device according to claim 33, wherein the second adapting part is a revolving body, and the inner wall of the first adapting part is ring-shaped.
The filter device according to claim 34, wherein the second adapting portion is a cylinder or a cone.
The filter device according to any one of claims 12 to 18, wherein the filter lens is a circular polarizing lens, a neutral gray filter or an ultraviolet filter.
The filter device according to any one of claims 12 to 18, wherein the outer wall of the filter fixing ring is provided with a non-slip texture.
A shooting device, characterized by comprising an image sensor, a lens and a filter device, the rear end of the lens is opposite to the image sensor, the filter device is arranged at the front end of the lens; the filter The device includes a mounting base and at least one filter assembly, the mounting base is used to connect to the front end of the lens, and the filter assembly is mounted on the mounting base by magnetic attraction.
The photographing apparatus according to claim 38, wherein the number of the filter components is at least two, and at least two of the filter components are sequentially connected along the axial direction of the lens.
The photographing apparatus according to claim 39, wherein, in at least two of the filter assemblies, the filter assembly that is not connected to the mounting base is mounted on the other filter assembly by magnetic adsorption.
The photographing device according to any one of claims 38 to 40, wherein at least part of the structure of the mounting base is magnetic, and at least part of the structure in the filter assembly is magnetically attractable by the magnetic member Of materials; or,

At least part of the structure of the mounting base is made of a material that can be magnetically attracted by the magnetic member, and at least part of the structure in the filter assembly is magnetic.
The photographing device according to claim 41, wherein the mounting base is provided with a light-passing hole through which the lens can pass light.
The photographing device according to claim 42, wherein a side of the light-through hole facing away from the front end of the lens forms a first accommodating cavity, and the first accommodating cavity is used to accommodate the filter assembly At least part of the structure.
The photographing device according to claim 43, wherein the first accommodating cavity has an annular cavity wall, and the filter assembly is rotatably disposed in the first accommodating cavity.
The photographing device according to claim 44, wherein the annular cavity wall is provided with an internal thread, and the internal thread is used for screwing with the filter assembly.
The photographing apparatus according to claim 43, wherein a first positioning portion protruding toward the center of the lens is provided in the through hole, and the first positioning portion is used to restrict the filter assembly The axial position in the first accommodating cavity.
The photographing apparatus according to claim 46, wherein the first positioning portion is a positioning step provided on the inner wall of the light-through hole.
The shooting device according to any one of claims 42 to 47, wherein a side of the mounting base facing the front end of the lens has a cylindrical outer wall, and the cylindrical outer wall is provided with External thread screwed to the front of the lens.
The photographing device according to claim 41, wherein the filter assembly includes a filter fixing ring and a filter lens, the filter lens is fixed inside the filter fixing ring, and the filter is fixed The ring is used to connect with the mounting base or other filter components by magnetic adsorption.
The photographing device according to claim 49, wherein a second positioning part protruding toward the center of the filter fixing ring is provided on the inner wall of the filter fixing ring, and the second positioning part The filter lens abuts to limit the axial position of the filter lens in the filter fixing ring.
The photographing apparatus according to claim 50, wherein the second positioning portion is a stepped surface provided on the inner wall of the filter fixing ring.
The shooting device according to claim 50, wherein the filter assembly further comprises a pressure ring, the pressure ring is disposed inside the filter fixing ring, and the pressure ring is located on the filter lens On the side facing away from the second positioning part, the pressing ring is used to sandwich the filter lens together with the second positioning part.
The photographing device according to claim 52, wherein the shape of the outer edge of the pressure ring and the shape of the inner wall of the filter fixing ring match each other.
The photographing device according to claim 53, wherein the outer edge of the pressing ring and the inner wall of the filter fixing ring are both circular in shape.
The photographing device according to claim 54, wherein the outer edge of the pressure ring has an external thread, and the inner edge of the filter fixing ring is provided with an internal thread that matches the external thread on the pressure ring Thread, the pressure ring is screwed with the filter fixing ring through the cooperation of the external thread and the internal thread.
The shooting device according to any one of claims 49 to 55, wherein the filter assembly includes at least one magnetic member, and at least one second accommodating cavity is formed on the filter fixing ring, and the magnetic The piece is arranged in the second accommodating cavity.
The shooting device according to claim 56, wherein the second accommodating cavity has an opening, and the opening faces the front end of the lens.
The photographing device according to claim 57, wherein the opening of the second accommodating cavity is located on the end surface of the filter fixing ring, and the end surface of the filter fixing ring is flat.
The photographing device according to claim 58, wherein the magnetic member is completely contained in the second accommodating cavity.
The photographing device according to claim 59, wherein the outer surface of the magnetic member is flush with the end surface where the opening of the second accommodating cavity is located.
The photographing device according to any one of claims 57-60, wherein the magnetic member is located on a side of the filter fixing ring facing the front end of the lens.
The photographing apparatus according to claim 56, wherein the magnetic member is disposed in the second accommodating cavity through an adhesive.
The photographing apparatus according to claim 56, wherein the number of the magnetic members is plural, and the plurality of magnetic members are distributed at intervals in the circumferential direction of the filter fixing ring.
The photographing device according to claim 56, wherein the magnetic member is a permanent magnet.
The photographing apparatus according to claim 64, wherein the magnetic pole direction of the magnetic member is along the axial direction of the lens.
The photographing device according to any one of claims 49 to 55, wherein the filter fixing ring is a magnetic body.
The photographing apparatus according to claim 66, wherein the magnetic pole direction of the filter fixing ring is along the axial direction of the lens.
The shooting device according to any one of claims 49 to 55, wherein an end of the filter fixing ring facing away from the front end of the lens has a first adapting portion, and the filter fixing ring faces the One end of the front end of the lens has a second adapting part matching the shape of the first adapting part.
The shooting device according to claim 68, wherein the number of the filter components is at least two, and of the at least two filter components, the previous filter component along the axis of the lens The second adapting portion of the filter fixing ring is correspondingly connected to the first adapting portion of the filter fixing ring of the latter filter assembly.
The photographing apparatus according to claim 68, wherein the first adapting portion is an opening, and the second adapting portion can be inserted into the opening.
The photographing apparatus according to claim 70, wherein the second adapting part is a revolving body, and the inner wall of the first adapting part is ring-shaped.
The photographing device according to claim 71, wherein the second adapting part is a cylinder or a cone.
The photographing device according to any one of claims 49 to 55, wherein the filter lens is a circular polarizing lens, a neutral gray filter or an ultraviolet filter.
The photographing device according to any one of claims 49 to 55, wherein the outer wall of the filter fixing ring is provided with a non-slip texture.
The photographing apparatus according to any one of claims 38 to 40, wherein the mounting base of the filter device and the lens have an integrated structure.