Active follow focus device for virtual film production

Abstract

The utility model relates to the field of follow focus devices, and discloses an active follow focus device for virtual film production, which comprises a frame body, the side wall of the frame body is fixedly connected with a fixing table, the side wall of the fixing table is slidably connected with a sliding plate, the side wall of the sliding plate is fixedly connected with a first fixing block, and the side wall of the fixing table is fixedly connected with a second fixing block. A sliding shaft is fixedly connected to the interior of the first fixing block, the outer wall of the sliding shaft is slidably connected to the interior of the second fixing block, a first spring sleeves the outer wall of the sliding shaft, a plurality of rotating plates are rotatably connected to the side wall of the sliding plate, the side walls of the rotating plates are rotatably connected to the side wall of the fixing table, and a clamp is rotatably connected to the side wall of each rotating plate. According to the utility model, through the cooperation of the fixed station, the sliding shaft, the clamp and other structures, the configuration process of the follow focus device is simplified, tedious dismounting operation is not needed, the use efficiency of the device is significantly improved, and the operation experience of a user is optimized at the same time.

Description

Technical Field

[0001] The utility model relates to the field of follow focusers, in particular to an active follow focuser for virtual production. Background Art

[0002] Active follow focusers play a crucial role in virtual production. They are key film and television photography equipment specifically used to achieve focal length adjustment and follow focus functions in virtual scenes. The introduction of active follow focusers has greatly improved the efficiency and quality of virtual production, enabling photographers to more precisely control the focus and seamlessly interact with dynamic elements in the virtual environment. These devices are not only applicable to traditional live-action film production but also provide important support for the development of virtual reality, augmented reality, and other digital imaging technologies.

[0003] In traditional active follow focusers, an electric motor is responsible for driving the rotation of the focus ring or gear system to adjust the focus position of the lens. The control unit includes a microprocessor and electronic circuits for receiving instructions from users or systems, controlling the operation of the electric motor, and monitoring the focus position. The control panel is an interface for photographers or operators to manually or automatically control focus adjustment through these interfaces. The connection interface is used to connect to photographic equipment (such as cameras or virtual production systems) and usually includes USB, radio, or other standard interfaces for data exchange and transmission of control instructions.

[0004] However, the fixing method of traditional follow focusers often uses multiple fixing bolts to connect the follow focuser to the camera. This connection method is very inconvenient when disassembling and assembling the follow focuser and requires a long time for debugging, which is not conducive to the efficient use of the follow focuser. Content of the Utility Model

[0005] To make up for the above deficiencies, the utility model provides an active follow focuser for virtual production, aiming to improve the problem that the fixing method of traditional follow focusers often uses multiple fixing bolts to connect the follow focuser to the camera. This connection method is very inconvenient when disassembling and assembling the follow focuser and requires a long time for debugging, which is not conducive to the efficient use of the follow focuser.

[0006] To achieve the above object, the utility model adopts the following technical scheme: An active follow focuser for virtual production includes a frame body. A fixed platform is fixedly connected to the side wall of the frame body. A sliding plate is slidably connected to the side wall of the fixed platform. A first fixing block is fixedly connected to the side wall of the sliding plate. A second fixing block is fixedly connected to the side wall of the fixed platform. A sliding shaft is fixedly connected inside the first fixing block. The outer wall of the sliding shaft is slidably connected inside the second fixing block. A first spring is sleeved on the outer wall of the sliding shaft. A plurality of rotating plates are rotatably connected to the side wall of the sliding plate. The side walls of the rotating plates are rotatably connected to the side wall of the fixed platform. A clamp is rotatably connected to the side wall of each rotating plate. A fixing component is arranged on the side wall of the frame body, and the fixing component is used to fix the carrying structure.

[0007] Further, the fixing component includes a top plate which is fixedly connected to the side wall of the frame body.

[0008] Further, a plurality of connecting frames are fixedly connected to the side wall of the top plate, and a special-shaped groove is formed inside each connecting frame.

[0009] Further, a fixing plate is fixedly connected to the side wall of the top plate, and a fixing bolt is threadedly connected inside the fixing plate.

[0010] Further, a pressing platform is slidably connected to the side wall of the connecting frame, and a second spring is arranged between the pressing platform and the fixing plate.

[0011] Further, a sliding column is rotatably connected inside the pressing platform, and the outer wall of the sliding column is slidably connected inside the special-shaped groove.

[0012] Further, a first connecting rod is fixedly connected to the outer wall of the sliding column, and one end of the first connecting rod is rotatably connected to a second connecting rod.

[0013] Further, a pull handle is fixedly connected to the side wall of the second connecting rod.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, first, the sliding plate slides on the side wall of the fixed platform after being stressed. Through the displacement of the sliding plate, finally, the rotating plate can drive the fixture on its side wall to change the relative clamping state, and be fixed or unlocked with the camera. With this structure, the rapid configuration of this follow focus device is realized, without a cumbersome disassembly and assembly process, improving the use efficiency while optimizing the use experience.

[0016] 2. In the utility model, when the pull handle is stressed, it drives the second connecting rod on its side wall to rotate and change the inclination angle. Finally, due to the trajectory constraint of the special-shaped groove, the pressing platform on the side wall of the sliding column slides on the side wall of the connecting frame, and through the tension of the pressing platform, this pull handle remains stable in the extended and retracted states, making this follow focus device easy to carry and increasing the versatility of this follow focus device. Description of the Drawings

[0017] Figure 1 is a three-dimensional view of the active follow focus device for virtual production proposed by the utility model;

[0018] Figure 2 is a schematic structural diagram of the fixed platform of the active follow focus device for virtual production proposed by the utility model;

[0019] Figure 3 is a schematic structural diagram of the top plate of the active follow focus device for virtual production proposed by the utility model.

[0020] Legend Explanation:

[0021] 1. Frame body; 2. Fixed platform; 3. Slide plate; 4. First fixing block; 5. Second fixing block; 6. Slide shaft; 7. First spring; 8. Rotating plate; 9. Clamp; 10. Top plate; 11. Connecting frame; 12. Special-shaped groove; 13. Fixed plate; 14. Fixed bolt; 15. Second spring; 16. Pressing platform; 17. Slide column; 18. First connecting rod; 19. Second connecting rod; 20. Pull handle. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Referring to Figure 1 - Figure 2 , an embodiment provided by the present invention: An active focus puller for virtual production, including a frame body 1, a fixed platform 2 is fixedly connected to the side wall of the frame body 1, a slide plate 3 is slidably connected to the side wall of the fixed platform 2, a first fixing block 4 is fixedly connected to the side wall of the slide plate 3, a second fixing block 5 is fixedly connected to the side wall of the fixed platform 2, a slide shaft 6 is fixedly connected inside the first fixing block 4, the outer wall of the slide shaft 6 is slidably connected inside the second fixing block 5, a first spring 7 is sleeved on the outer wall of the slide shaft 6, a plurality of rotating plates 8 are rotatably connected to the side wall of the slide plate 3, the side wall of the rotating plate 8 is rotatably connected to the side wall of the fixed platform 2, a clamp 9 is rotatably connected to the side wall of each rotating plate 8, and a fixing component is arranged on the side wall of the frame body 1, and the fixing component is used for fixing the carrying structure.

[0024] Specifically, when the slide plate 3 is pushed, the slide plate 3 will slide along the side wall of the fixed platform 2 after being stressed. Through the displacement of the slide plate 3, the first fixing block 4 fixed to its side wall and the slide shaft 6 inside the first fixing block 4 will move synchronously. The slide shaft 6 slides inside the second fixing block 5 and simultaneously compresses the first spring 7. This process enables the rotating plate 8 installed on the slide plate 3 to rotate on the side walls of the slide plate 3 and the fixed platform 2 and change its own inclination angle. The change in the inclination angle of the rotating plate 8 will cause the clamp 9 on its side wall to correspondingly change its relative clamping state, so as to be able to quickly fix or unlock with the camera. This structural design greatly simplifies the configuration process of the focus puller, eliminates the need for cumbersome disassembly and assembly operations, significantly improves the use efficiency of the device, and optimizes the user's operation experience.

[0025] Referring to Figure 3, the fixing component includes a top plate 10, the top plate 10 is fixedly connected to the side wall of the frame body 1, a plurality of connecting frames 11 are fixedly connected to the side wall of the top plate 10, a special-shaped groove 12 is formed inside each connecting frame 11, a fixing plate 13 is fixedly connected to the side wall of the top plate 10, a fixing bolt 14 is threadedly connected inside the fixing plate 13, a pressing platform 16 is slidably connected to the side wall of the connecting frame 11, a second spring 15 is arranged between the pressing platform 16 and the fixing plate 13, a sliding column 17 is rotatably connected inside the pressing platform 16, the outer wall of the sliding column 17 is slidably connected inside the special-shaped groove 12, a first connecting rod 18 is fixedly connected to the outer wall of the sliding column 17, one end of the first connecting rod 18 is rotatably connected to a second connecting rod 19, and a pulling handle 20 is fixedly connected to the side wall of the second connecting rod 19.

[0026] Specifically, when the pulling handle 20 is stressed, it will drive the second connecting rod 19 on its side wall to rotate and change its inclination angle. The movement of the second connecting rod 19 simultaneously affects the first connecting rod 18 at one end of it, causing the first connecting rod 18 to also rotate and change its own inclination angle. Through the movement of the first connecting rod 18, the sliding column 17 at one end of it can slide inside the special-shaped groove 12. The design of the special-shaped groove 12 ensures that the sliding column 17 can move along a specific track. The pressing platform 16 on the side wall of the sliding column 17 slides on the side wall of the connecting frame 11. At the same time, through the tension of the pressing platform 16, the pulling handle 20 can be kept stable under the action of the device for pushing out and retracting. This design makes the follow focus more convenient and stable to carry, enhances its versatility, simplifies the carrying process of the follow focus, and also ensures the safety and stability of the device during movement, improving its applicability and the convenience of use.

[0027] Working principle: When this follow focus needs to be fixed on the surface of the camera, first push the sliding plate 3. After the sliding plate 3 is stressed, it slides on the side wall of the fixed platform 2. Through the displacement of the sliding plate 3, the first fixing block 4 on its side wall and the sliding shaft 6 inside the first fixing block 4 are displaced synchronously. The sliding shaft 6 slides inside the second fixing block 5 and simultaneously compresses the first spring 7, enabling the rotating plate 8 to rotate on the side walls of both the sliding plate 3 and the fixed platform 2 and change its own inclination angle. At this time, the rotating plate 8 can drive the clamp 9 on its side wall to change the relative clamping state, and fix or unlock it with the camera. With this structure, the rapid configuration of this follow focus is realized, without the need for a cumbersome disassembly and assembly process, improving the use efficiency while optimizing the use experience. When this follow focus needs to be carried, pull the pulling handle 20. After the pulling handle 20 is stressed, it drives the second connecting rod 19 on its side wall to rotate and change the inclination angle. At this time, the second connecting rod 19 drives the first connecting rod 18 at one end of it to also rotate and change its own inclination angle. Through the movement of the first connecting rod 18, the sliding column 17 at one end of it can slide inside the special-shaped groove 12. Through the trajectory constraint of the special-shaped groove 12, the pressing platform 16 on the side wall of the sliding column 17 slides on the side wall of the connecting frame 11, and through the tension of the pressing platform 16, this pulling handle 20 is kept stable in the pushed-out and retracted states, making this follow focus easy to carry and increasing the versatility of this follow focus.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An active follow focus device for virtual film production, comprising a frame (1), characterized in that: The side wall of the frame body (1) is fixedly connected to a fixed platform (2), the side wall of the fixed platform (2) is slidably connected to a slide plate (3), the side wall of the slide plate (3) is fixedly connected to a fixed block 1 (4), the side wall of the fixed platform (2) is fixedly connected to a fixed block 2 (5), the interior of the fixed block 1 (4) is fixedly connected to a sliding shaft (6), the outer wall of the sliding shaft (6) is slidably connected to the interior of the fixed block 2 (5), the outer wall of the sliding shaft (6) is sleeved with a spring 1 (7), the side wall of the slide plate (3) is rotatably connected to a plurality of rotating plates (8), the side wall of the rotating plate (8) is rotatably connected to the side wall of the fixed platform (2), each side wall of the rotating plate (8) is rotatably connected to a clamp (9), and the side wall of the frame body (1) is provided with a fixing component, and the fixing component is used to fix the carrying structure.

2. The active follow focus device for virtual film production according to claim 1, characterized in that: The fixing assembly comprises a top plate (10), and the top plate (10) is fixedly connected to the side wall of the frame body (1).

3. The active follow focus device for virtual film production according to claim 2, characterized in that: A plurality of connecting frames (11) are fixedly connected to the side wall of the top plate (10), and each connecting frame (11) is provided with a special-shaped groove (12) inside.

4. The active follow focus device for virtual film production according to claim 3, characterized in that: A fixing plate (13) is fixedly connected to the side wall of the top plate (10), and a fixing bolt (14) is threadedly connected inside the fixing plate (13).

5. The active follow focus device for virtual film production according to claim 4, characterized in that: The side wall of the connecting frame (11) is slidably connected with a pressing platform (16), and a second spring (15) is arranged between the pressing platform (16) and the fixing plate (13).

6. The active follow focus device for virtual film production according to claim 5, characterized in that: A sliding column (17) is rotatably connected inside the pressing platform (16), and the outer wall of the sliding column (17) is slidably connected inside the special-shaped groove (12).

7. The active follow focus device for virtual film production according to claim 6, characterized in that: The outer wall of the sliding column (17) is fixedly connected to a connecting rod 1 (18), and one end of the connecting rod 1 (18) is rotatably connected to a connecting rod 2 (19).

8. The active follow focus device for virtual film production according to claim 7, characterized in that: The side wall of the second connecting rod (19) is fixedly connected with a pull handle (20).

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