A filter holder

Abstract

The utility model discloses a filter support, including fixed frame, two active elements, two driven module and transmission part. Active element and driven module all are opposite fixed frame mobile setting, and transmission part is opposite fixed frame rotation setting. Two active elements and two driven module are along annular arrangement, and a driven module is located between two active elements. Active element and transmission part transmission connection, and driven module also with transmission part transmission connection. When active element is opposite fixed frame mobile, can drive transmission part opposite fixed frame rotation, and then promotes driven module to move to the same mobile direction with active element. The structure realizes the cooperation of active element and driven module through transmission part, improves the adjustment flexibility, can better adapt to different caliber lens, reduces the dark corner, satisfies the diversified shooting demand.

Description

Technical Field

[0001] This utility model relates to the field of photographic filter technology, and in particular to a filter holder. Background Technology

[0002] In the fields of photography and videography, filter holders, as key components connecting lenses and filters, significantly impact the shooting results. An ideal filter holder should be compatible with lenses of different diameters while providing convenient light-blocking adjustment to improve shooting efficiency and reduce costs.

[0003] Currently, various types of filter holders exist on the market. Taking the variable-diameter filter holder for cameras disclosed in Chinese utility model patent document (publication number CN216526456U) as an example, this holder has certain advantages in mounting filters on cameras. Its holder assembly has first light-blocking plates on the left and right sides, and second light-blocking plates on the top and bottom sides respectively. The second light-blocking plates can be adjusted vertically relative to the holder assembly, while the first light-blocking plates can be adjusted horizontally relative to the holder assembly. This design allows for adjustable light-blocking when the filter holder is clamped and fixed with lenses of different diameters. This means that photographers can use this structure to apply large-diameter filters to smaller-diameter lenses, achieving light-blocking effects while effectively saving costs.

[0004] However, in-depth research reveals several unresolved issues with the existing technology. Regarding the adjustment method, the current filter holder uses a direct linkage between the first and second light-blocking plates for adjustment. This linkage structure has significant limitations. When manufacturers want to increase the number of second light-blocking plates during the design and production phase to accommodate more diverse design needs, the existing linkage method cannot achieve this, limiting the product's design versatility and adaptability. Furthermore, when there are only two second light-blocking plates, the ring formed by the first and second light-blocking plates is square, while common lenses are circular. This shape difference easily leads to vignetting issues in actual shooting, reducing the professionalism and aesthetics of the shooting results. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a filter holder.

[0006] A filter holder designed for this purpose includes a fixed frame, two active elements that are relatively movable on the fixed frame, two driven modules that are relatively movable on the fixed frame, and a transmission element that is rotatably disposed relative to the fixed frame.

[0007] Two active elements and two passive modules are arranged in a ring, with one of the passive modules disposed between the two active elements;

[0008] The active element is connected to the transmission component in a transmission connection;

[0009] The driven module is connected to the transmission component in a transmission connection;

[0010] When the active element moves relative to the fixed frame, it can drive the transmission component to rotate relative to the fixed frame, thereby pushing the driven module to move in the same direction as the active element.

[0011] Preferably, the driven module includes a plurality of driven elements, which are movable relative to the fixed frame;

[0012] The driven element has a driven groove on its wall facing the transmission member, and the transmission member has a transmission protrusion that is movably inserted into the driven groove.

[0013] When the transmission component rotates relative to the fixed frame, the transmission protrusion pushes the driven element to move relative to the fixed frame.

[0014] Preferably, the fixed frame is provided with a sliding groove, and the driven element is provided with a sliding block that is slidably disposed in the sliding groove.

[0015] Preferably, the active element has a drive groove on the wall facing the transmission member, and the transmission member has a drive protrusion that is movably inserted into the drive groove.

[0016] When the active element moves relative to the fixed frame, the driving groove cooperates with the driving protrusion to push the transmission component to rotate relative to the fixed frame.

[0017] Preferably, the fixed frame includes a front frame and a rear frame that are fixedly connected to each other;

[0018] The active element, the driven module, and the transmission component are disposed between the front frame and the rear frame;

[0019] The active element extends at least partially to the outside of the fixed frame.

[0020] Preferably, the fixed frame is connected to the active element by an elastic element, which is used to apply force to the active element.

[0021] Preferably, the fixed frame is provided with a first connecting block, and the active element is provided with a second connecting block;

[0022] The elastic element is disposed between the first connecting block and the second connecting block and is connected to both.

[0023] Preferably, the active element or the driven element is provided with a locking block that fits against the leading edge of the lens.

[0024] Compared with the prior art, this filter holder solution brings many beneficial effects through its innovative transmission structure design:

[0025] First, it breaks through the limitation of the number of components in the traditional linkage structure of light-shielding plates. The solution adopts a transmission method in which active components, driven modules, and transmission components work together. Compared with the existing structure where the first and second light-shielding plates are directly linked, the number of driven components in the driven module can be increased according to the usage requirements thanks to the transmission components. When designing and producing, manufacturers only need to reasonably arrange the driven components and connect them to the transmission components to achieve coordinated adjustment of multiple sets of components, which greatly improves the diversity and adaptability of the product at the design level and can better meet the light-shielding needs in different scenarios.

[0026] Secondly, it effectively improves the vignetting problem. Because the two active elements and two driven modules are arranged in a ring, with one driven module positioned between the two active elements, when the active elements drive the transmission mechanism to rotate, thereby pushing the driven modules to move in the same direction, all elements can work together to form an adjustment area that more closely approximates the circle of the lens. This transmission structure allows for an unlimited number of driven elements in the driven modules; by increasing the number of driven elements, the shape of the entire light-blocking ring can be improved, making the light-blocking range better suited to a circular lens, reducing vignetting caused by shape differences, and significantly enhancing the professionalism and aesthetics of the image quality.

[0027] Furthermore, it enhances the flexibility and precision of light-blocking adjustment. The active element indirectly drives the driven module through the transmission component, making the adjustment process smoother and more orderly. The movement direction of each element is consistent, enabling it to quickly and accurately adapt to lenses of different diameters. While achieving the light-blocking effect, it ensures ease of operation, further meeting the performance requirements of photographers for filter holders in diverse shooting scenarios. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of the filter holder;

[0029] Figure 2 This is one of the exploded structural diagrams of a filter holder;

[0030] Figure 3 This is the second exploded structural diagram of the filter holder;

[0031] Figure 4 This is the third exploded structural diagram of the filter holder;

[0032] Figure 5 This is a schematic diagram of the cross-sectional structure of the filter holder;

[0033] Figure 6 This is a schematic diagram showing the filter holder installed in front of the lens.

[0034] Figure 7 This is a schematic diagram of the installation of the filter and filter holder. Detailed Implementation

[0035] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0037] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0038] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0039] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0040] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0041] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0042] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0043] See Figures 1-6 A filter holder includes a fixed frame 10, two active elements 20 relatively movable on the fixed frame 10, two driven modules 30 relatively movable on the fixed frame 10, and a transmission member 40 rotatably disposed relative to the fixed frame 10; the two active elements 20 and the two driven modules 30 are arranged in a ring, with one driven module 30 disposed between the two active elements 20; the active elements 20 are drively connected to the transmission member 40; the driven modules 30 are drively connected to the transmission member 40; when the active element 20 moves relative to the fixed frame 10, it can drive the transmission member 40 to rotate relative to the fixed frame 10 to push the driven module 30 to move in the same direction as the active element 20.

[0044] The working principle of this filter holder is based on the transmission and coordination between its various components to achieve coordinated movement. The specific process is as follows:

[0045] When adjustment is required, external force drives the two active elements 20 to move relative to the fixed frame 10. Since the active elements 20 are connected to the transmission element 40, the movement of the active elements 20 will cause the transmission element 40 to rotate relative to the fixed frame 10.

[0046] The driven module 30 is also connected to the transmission component 40. During the rotation of the transmission component 40, it generates a pushing force on the driven module 30. Since the two driving elements 20 and the two driven modules 30 are arranged in a ring, with one driven module 30 located between the two driving elements 20, this layout, combined with the transmission action of the transmission component 40, allows the driven module 30 to move relative to the fixed frame 10 in the same direction of movement as the driving elements 20.

[0047] Through this transmission logic, the movement of the active element 20 is transmitted to the driven module 30 via the transmission component 40, realizing the coordinated adjustment of all elements, thereby achieving the purpose of adapting to lenses of different apertures.

[0048] See Figures 3 to 5 The driven module 30 includes several driven elements 310, which are movably disposed relative to the fixed frame 10. Each driven element 310 has a driven groove 320 on its wall facing the transmission member 40. The transmission member 40 has a transmission protrusion 410, which is movably inserted into the driven groove 320. When the transmission member 40 rotates relative to the fixed frame 10, the transmission protrusion 410 pushes the driven element 310 to move relative to the fixed frame 10. The arrangement of several driven elements 310 provides a basis for forming an annular area suitable for the lens. By increasing or decreasing the number of driven elements 310, the shape accuracy of the enclosed area can be flexibly adjusted to better fit a circular lens and reduce the possibility of vignetting. The movable arrangement of the driven elements 310 relative to the fixed frame 10 ensures that their position can be changed according to adjustment needs, thereby adjusting the light-blocking range. The engagement between the driven inclined groove 320 and the transmission protrusion 410 is the core structure that converts the rotational motion of the transmission component 40 into the linear motion of the driven element 310. When the transmission component 40 rotates relative to the fixed frame 10, the transmission protrusion 410 moves within the driven inclined groove 320. Utilizing the guiding effect of the groove, the rotational force is converted into a force that pushes the driven element 310 to move, enabling the driven element 310 to move precisely relative to the fixed frame 10 along a set direction. This transmission method not only ensures stable and reliable transmission but also guarantees that multiple driven elements 310 move synchronously under the drive of the transmission component 40, ensuring the consistency of adjustment for each element. This, in turn, achieves precise adaptation to lenses of different apertures, improving the overall adjustment performance and usability of the filter holder.

[0049] In this utility model, the driven element 310 can also be driven by the transmission method of gear and rack to transmit power to the transmission component 40. That is, a gear is provided on the transmission component 40, a rack is provided on the driven element 310, and a transmission gear is provided between the gear and the rack. The rotation of the transmission component 40 drives the gear to drive the transmission gear to rotate, and the transmission gear drives the rack to drive the driven element 310 to move.

[0050] See Figure 3 and Figure 4 The fixed frame 10 is provided with a sliding groove 130, and the driven element 310 is provided with a sliding block 330 slidably disposed within the sliding groove 130. The sliding block 330 slidably disposed within the sliding groove 130 provides precise trajectory guidance for the movement of the driven element 310 relative to the fixed frame 10. When the driven element 310 needs to move under the push of the transmission member 40, the sliding block 330 will slide smoothly along the extension direction of the sliding groove 130, ensuring that the driven element 310 can only move in the preset direction, avoiding problems such as deviation, shaking or jamming of the driven element 310 during movement, and ensuring the linearity and stability of the movement.

[0051] See Figure 5 The active element 20 has a driving groove 210 on its wall facing the transmission member 40. The transmission member 40 has a driving protrusion 420, which is movably inserted into the driving groove 210. When the active element 20 moves relative to the fixed frame 10, the driving groove 210 and the driving protrusion 420 cooperate to push the transmission member 40 to rotate relative to the fixed frame 10. When the active element 20 is subjected to an external force and moves relative to the fixed frame 10, the driving groove 210 moves with the active element 20. At this time, the driving protrusion 420, which is movably inserted into the driving groove 210, interacts with the groove wall of the driving groove 210. Since the drive spur 210 is inclined, it will exert a lateral thrust on the drive protrusion 420 through the spur wall during the linear motion with the active element 20. The drive protrusion 420 is connected to the transmission member 40. This thrust will drive the transmission member 40 to rotate around its rotational connection point with the fixed frame 10, thereby smoothly converting the linear movement of the active element 20 into the rotational movement of the transmission member 40.

[0052] See Figures 2 to 4The fixed frame 10 includes a front frame 110 and a rear frame 120 fixedly connected to each other; the active element 20, the driven module 30, and the transmission component 40 are disposed between the front frame 110 and the rear frame 120; the active element 20 extends at least partially to the outside of the fixed frame 10. Firstly, the fixed connection between the front frame 110 and the rear frame 120 forms a stable overall structure, providing reliable installation space and support for the active element 20, the driven module 30, and the transmission component 40. This enclosed and stable housing effectively protects internal components from external impacts, dust, and other factors, ensuring that each component maintains a stable working state during long-term use and extending the service life of the filter holder. Simultaneously, the compact spatial layout also facilitates the coordinated operation between components, reducing transmission errors caused by shaking or displacement and improving the overall adjustment accuracy. Secondly, the design of the active element 20 extending at least partially to the outside of the fixed frame 10 provides convenience for user operation. Users do not need to penetrate deep into the fixed frame; they can apply external force through the external active element portion to drive the active element to move relative to the fixed frame, thereby operating the entire adjustment mechanism. This design ensures the sealing and safety of the internal transmission structure, simplifies the operation process, improves user convenience, and makes the adjustment of the filter holder more efficient and effortless.

[0053] See Figure 4 The fixed frame 10 is connected to the active element 20 by an elastic element 60, which applies a force to the active element 20. The elastic element 60 can continuously apply a force to the active element 20. When the active element 20 moves relative to the fixed frame 10 under the action of an external force, the force can cause the active element 20 to reset when the external force is removed, ensuring the reversibility and convenience of the position adjustment of the active element.

[0054] See Figure 3 and Figure 4 The fixed frame 10 is provided with a first connecting block 140, and the active element 20 is provided with a second connecting block 220. The elastic element 60 is disposed between and connected to both the first connecting block 140 and the second connecting block 220. The arrangement of the first connecting block 140 and the second connecting block 220 clarifies the installation position of the elastic element 60 between the fixed frame 10 and the active element 20, ensuring that the elastic element 60 can accurately connect the two. This structural design allows the force of the elastic element 60 to be stably applied to the active element 20 along a preset direction, avoiding deviation in the direction of the force due to installation position deviation, thereby ensuring uniform force on the active element 20 and a smoother and more reliable movement and reset process.

[0055] See Figure 3An installation channel 150 is provided between the front frame 110 and the rear frame 120. The installation channel 150 is located between the first connecting block 140 and the second connecting block 220, and the elastic element can be disposed within the installation channel 150. The installation channel 150 effectively limits and guides the elastic element. Since the elastic element is placed within this channel, the inner wall of the channel can limit the displacement of the elastic element during its expansion and contraction, ensuring that the elastic element always moves on a preset path. This avoids affecting the stability and directional accuracy of the force applied to the active element 20 due to the elastic element shaking or misalignment, further ensuring the smoothness of the movement and reset of the active element 20.

[0056] In this invention, the elastic element is a spring.

[0057] See Figure 1 The active element 20 or the driven element 310 is provided with a locking block 50 that fits against the leading edge of the lens 70. Under the action of the elastic element, the elastic element applies a force to the active element 20, so that the locking block 50 remains in contact with the leading edge of the lens 70.

[0058] See Figure 7 When in use, the filter 80 is installed on the fixed frame 10. The installation method can be the existing detachable connection structure such as magnetic, threaded connection or snap-fit.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A filter holder characterized by: It includes a fixed frame (10), two active elements (20) that are relatively movable on the fixed frame (10), two driven modules (30) that are relatively movable on the fixed frame (10), and a transmission member (40) that is rotatably disposed relative to the fixed frame (10); Two active elements (20) and two passive modules (30) are arranged in a ring, and one of the passive modules (30) is disposed between the two active elements (20); The active element (20) is connected to the transmission element (40) in a transmission connection; The driven module (30) is connected to the transmission component (40) in a transmission connection; When the active element (20) moves relative to the fixed frame (10), it can drive the transmission element (40) to rotate relative to the fixed frame (10) to push the driven module (30) to move in the same direction as the active element (20).

2. A filter holder according to claim 1, characterised in that: The driven module (30) includes a plurality of driven elements (310), which are movably disposed relative to the fixed frame (10); The driven element (310) has a driven groove (320) on its wall facing the transmission member (40), and the transmission member (40) has a transmission protrusion (410) which is movably inserted into the driven groove (320). When the transmission member (40) rotates relative to the fixed frame (10), the transmission protrusion (410) pushes the driven element (310) to move relative to the fixed frame (10).

3. A filter holder according to claim 2, wherein: The fixed frame (10) is provided with a sliding groove (130), and the driven element (310) is provided with a sliding block (330) that is slidably disposed in the sliding groove (130).

4. A filter holder according to claim 1, characterized in that: The active element (20) has a drive groove (210) on the wall surface facing the transmission member (40), and the transmission member (40) has a drive protrusion (420) which is movably inserted into the drive groove (210). When the active element (20) moves relative to the fixed frame (10), the driving groove (210) cooperates with the driving protrusion (420) to push the transmission member (40) to rotate relative to the fixed frame (10).

5. A filter holder according to claim 1, characterized in that: The fixed frame (10) includes a front frame (110) and a rear frame (120) that are fixedly connected to each other; The active element (20), the driven module (30), and the transmission component (40) are disposed between the front frame (110) and the rear frame (120); The active element (20) extends at least partially to the outside of the fixed frame (10).

6. A filter holder according to claim 1, characterized in that: The fixed frame (10) is connected to the active element (20) by an elastic element (60), which is used to apply force to the active element (20).

7. A filter holder according to claim 6, wherein: The fixed frame (10) is provided with a first connecting block (140), and the active element (20) is provided with a second connecting block (220); The elastic element (60) is arranged between and connected with the first connecting block (140) and the second connecting block (220).

8. A filter holder according to claim 2, wherein: The active element (20) or the driven element (310) is provided with a clamping block (50) abutting the front edge of the lens (70).

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