Projection cylinder and film light device

Abstract

The application discloses a projection cylinder and a movie and television lamp device, and relates to the technical field of movie and television lighting equipment. The projection cylinder comprises a light collecting body and a projection body. The projection body comprises a main body assembly, a lens assembly and a hand wheel assembly. The main body assembly comprises a connecting seat and a connecting cylinder. The connecting seat is connected with the light collecting body, and the connecting cylinder is fixedly arranged in the connecting seat. The lens assembly comprises a lens cylinder and a lens group. The lens cylinder is arranged in the connecting cylinder and can move relative to the connecting cylinder in the front-back direction. The lens group is arranged in the lens cylinder and comprises a zoom group and a compensation group. The zoom group and the compensation group are spaced apart in the front-back direction and can move relative to the lens cylinder in the front-back direction. The hand wheel assembly comprises a focusing hand wheel and a zoom hand wheel. The focusing hand wheel is sleeved on the connecting cylinder and connected with the lens cylinder. The zoom hand wheel is sleeved on the lens cylinder. The damping between the focusing hand wheel and the connecting cylinder is greater than the damping between the zoom hand wheel and the lens cylinder. The technical scheme can realize fine and small focusing through the setting of the focusing hand wheel.

Description

Technical Field

[0001] This application relates to the field of film and television lighting equipment technology, and in particular to a projection tube and a film and television lighting device using the projection tube. Background Technology

[0002] As an optical accessory for film and television lights, a projection tube is used to precisely control and project the light emitted by the lights to achieve effects such as light and shadow modeling, atmosphere creation, and scene simulation. Some projection tubes not only have focusing functions but also zoom functions to meet various user needs.

[0003] In related technologies, the traditional focusing method for projector tubes involves the user sliding the tube back and forth to control the sharpness of the light spot. However, this sliding method involves a large adjustment range, making it easy for users to over-push or pull the tube when focusing, resulting in low precision. This forces users to repeatedly push and pull the tube back and forth to adjust, affecting the user experience. Summary of the Invention

[0004] This application provides a projection tube and a video light device that can achieve fine and minute focusing through the setting of the focusing handwheel, making it convenient for user operation.

[0005] In a first aspect, embodiments of this application provide a projection tube for use with a video light, comprising a light-collecting body and a projection body, wherein the light-collecting body is connected to the video light, and the projection body includes a main body assembly, a lens assembly, and a handwheel assembly. The main body assembly includes a connecting seat and a connecting tube. The connecting seat is connected to and communicates with the light-receiving body. One end of the connecting tube is fixedly inserted through the connecting seat. The lens assembly includes a lens barrel and a lens group. The lens barrel passes through the connecting tube and can move relative to the connecting tube in the front-back direction. The lens group is installed inside the lens barrel and includes a zoom group and a compensation group. The zoom group and the compensation group are spaced apart in the front-back direction and can both move relative to the lens barrel in the front-back direction. The handwheel assembly includes a focusing handwheel and a zoom handwheel. The focusing handwheel is sleeved on the connecting tube and fixedly connected to the lens barrel. The zoom handwheel is sleeved on the lens barrel. The damping between the focusing handwheel and the connecting cylinder is greater than the damping between the zoom handwheel and the lens barrel, such that the projection barrel is configured such that when the focusing handwheel is rotated, the handwheel assembly and the lens assembly move together in the front-back direction to bring the lens assembly closer to or away from the connecting base; while when the zoom handwheel is rotated, the zoom group and the compensation group move closer to or away from each other in the front-back direction, and the focusing handwheel does not rotate relative to the connecting cylinder.

[0006] In some embodiments, the projection body further includes a first resistance-increasing element disposed between the focusing handwheel and the connecting cylinder to increase the damping between the focusing handwheel and the connecting cylinder.

[0007] In some embodiments, the first resistance-increasing element is a silicone element and includes a ring body and a plurality of abutment ribs; The ring body is wrapped around the outer periphery of the connecting cylinder, and a plurality of abutting ribs are arranged at intervals on the outer surface of the ring body, and each abutting rib extends along the circumferential direction of the ring body; Among them, multiple of the abutting ribs abut against the inner surface of the focusing handwheel.

[0008] In some embodiments, the outer surface of the connecting cylinder is recessed to form a mounting groove, which extends circumferentially along the connecting cylinder. The ring body is disposed in the mounting groove, and the plurality of abutting ribs protrude from the groove opening of the mounting groove to abut against the inner surface of the focusing handwheel.

[0009] In some embodiments, the inner surface of the connecting cylinder is provided with an internal thread structure, and the outer surface of the lens barrel is provided with an external thread structure. The external thread structure is threadedly connected to the internal thread structure so that the connecting cylinder and the lens barrel are threadedly engaged. The projection body also includes a first limiting member, which is fixedly inserted through the connecting cylinder and extends into the gap between the outer surface of the lens tube and the inner surface of the connecting cylinder. The first limiting member is used to limit and abut against the external thread structure to prevent the lens barrel from coming off from the other end of the connecting cylinder.

[0010] In some embodiments, the projection body further includes a separator disposed between the focusing handwheel and the zoom handwheel along the front-back direction, so as to separate the focusing handwheel and the zoom handwheel from each other; And / or, the projection body further includes a second resistance-increasing component, which is disposed between the zoom handwheel and the lens barrel to increase the damping between the zoom handwheel and the lens barrel.

[0011] In some embodiments, the light-collecting body includes a light-collecting housing and a light-collecting lens, the light-collecting housing being used to connect to the video light, and the light-collecting lens being housed within the light-collecting housing; The light-collecting housing and the connecting base are detachably connected, so that the light-collecting body can be detachably connected to the projection body.

[0012] In some embodiments, the connector has a slot, the slot including an insertion section and a snap-fit ​​section that are in communication, and the light-receiving housing is provided with a snap-fit ​​block; The card block can enter the insertion section along the front-back direction. Then, the light-receiving housing rotates relative to the connecting seat so that the card block enters the snap-fit ​​section, thereby allowing the groove wall of the snap-fit ​​section to restrict the movement of the card block in the front-back direction.

[0013] In some embodiments, a limiting rib is provided near the insertion section of the connecting seat. The limiting rib extends circumferentially along the connecting seat and encloses a limiting notch. The light-receiving body also includes a second limiting member, which can be sequentially inserted into the light-receiving housing and the limiting notch to limit and abut against the limiting rib in the circumferential direction of the connecting seat.

[0014] Secondly, this application provides a film and television lighting device, which includes a projection tube and a film and television light as described above, and the film and television light is connected to the light receiving body; The light emitted by the film and television light passes through the light-receiving body and the projection body in sequence before being projected outward.

[0015] The projection tube and video light device based on the embodiments of this application achieve focusing by rotating a focusing handwheel. Compared to focusing by sliding or pulling, the projection tube of this embodiment allows users to control the focal length change with smaller amplitudes, thus enabling fine and minute focusing and facilitating user operation. Furthermore, based on the damping cooperation between the focusing handwheel and the connecting tube, the focusing handwheel can be suspended after focusing is completed, eliminating the need for an additional locking knob to keep the focusing handwheel and connecting tube relatively fixed, resulting in a simpler structure.

[0016] Furthermore, in this embodiment, by setting the damping between the focusing handwheel and the connecting tube to be greater than the damping between the zoom handwheel and the lens barrel, the focusing handwheel and the lens barrel remain absolutely stationary when the user rotates the zoom handwheel. This prevents the focusing handwheel and the lens barrel from being driven to rotate by the zoom handwheel. When the user rotates the focusing handwheel, the zoom handwheel is driven to rotate by the lens barrel and remains relatively stationary with respect to the lens barrel, thus preventing the zoom handwheel from rotating relative to the lens barrel. This ensures that the focusing function and the zoom function are relatively independent and do not affect each other. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a projection tube according to an embodiment of this application; Figure 2 for Figure 1 A cross-sectional view along the AA direction; Figure 3 for Figure 2 A magnified view of a section at point B in the middle; Figure 4 for Figure 1 The exploded view of the projection tube is shown. Figure 5 for Figure 4 The diagram shows the structure of the first resistance-increasing component. Figure 6 for Figure 4 The diagram shows the structural structure of the main components. Figure 7 for Figure 4 The diagram shows a partial structural schematic of the microscope tube; Figure 8 for Figure 4 The diagram shows a partial structural schematic of the focusing handwheel; Figure 9 for Figure 4 The diagram shown illustrates the structure of the zoom handwheel. Figure 10 for Figure 4 The diagram shows the structure of the light-collecting body.

[0019] Explanation of icon numbers: 100. Projection tube; 10. Light-collecting body; 11. Light-collecting housing; 111. Locking block; 112. Mounting base; 1121. Base; 1122. Cover plate; 12. Light-collecting lens; 13. Second limiting component; 14. Connecting frame; 20. Projection body; 21. Main component; 211. Connecting base; 2111. Slot; 2111A. Insertion section; 2111B. Locking section; 2112. Limiting rib; 2112A. Limiting notch; 212. Connecting tube; 2121. Mounting groove; 2122. Internal thread structure; 22. Lens assembly; 221. Lens tube; 2211. External thread structure; 2212. Spiral groove assembly; 2212A. First spiral groove; 2212B. Second spiral groove; 22 13. Avoidance area; 222. Lens group; 2221. Rear fixed group; 2222. Zoom group; 2222A. First slide column; 2223. Compensation group; 2223A. Second slide column; 2224. Front fixed group; 23. Handwheel assembly; 231. Focusing handwheel; 2311. First wheel body; 2312. Connecting skirt; 2312A. Abutment groove; 2313. Connector; 232. Zoom handwheel; 232A. Guide groove; 2321. Second wheel body; 2322. Blocking step; 2323. Blocking skirt; 24. First drag-increasing component; 241. Ring body; 242. Abutment rib; 25. First limiting component; 26. Separator; 27. Second drag-increasing component; x. Front and rear direction.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0022] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0023] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes 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, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0024] 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 belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Please refer to the following: Figures 1-4 This application proposes a film and television lighting device. In the embodiments of this application, the film and television lighting device includes a film and television light (not shown in the figure) and a projection tube 100 for use in conjunction with the film and television light. The film and television light is connected to the projection tube 100, and the light emitted by the film and television light passes through the projection tube 100 before being projected to the outside. This can achieve effects such as light and shadow modeling, atmosphere creation, and scene simulation.

[0026] Film and television lights are used to provide the necessary light during filming. Specifically, the light source of film and television lights can be an LED light source, which has the advantages of low energy consumption and high color rendering index. This embodiment does not impose specific restrictions on the type of light source for film and television lights.

[0027] The projection tube 100 includes a light-receiving body 10 and a projection body 20 connected to each other. The light-receiving body 10 is used to connect with a video light. The light emitted by the video light passes through the light-receiving body 10 and the projection body 20 in sequence before being projected to the outside.

[0028] It is understandable that the light emitted by the film and television lamp has a large divergence angle. Therefore, in this embodiment, the light receiving body 10 can gather the light emitted by the film and television lamp to ensure that more light can enter the projection body 20, thereby effectively improving the utilization rate of light.

[0029] The projection body 20 includes a main component 21, a lens assembly 22, and a handwheel assembly 23. The main component 21 includes a connecting base 211 and a connecting cylinder 212. The connecting base 211 is connected and communicates with the light-receiving body 10, so the light emitted from the film and television lamp passes through the light-receiving body 10 and enters the connecting base 211. The connecting base 211 may be equipped with a dimming accessory structure, which may include any one or more of a light cutter, a pattern piece, and an aperture, thus enriching the light control design. The connecting cylinder 212 serves to connect the connecting base 211 to the lens assembly 22. Specifically, one end of the connecting cylinder 212 is fixedly inserted through the connecting base 211 and connected to the lens assembly 22.

[0030] The lens assembly 22 includes a lens barrel 221 and a lens group 222. The lens barrel 221 is generally cylindrical and passes through a connecting cylinder 212 for connection to a connecting seat 211. The lens barrel 221 is movable relative to the connecting cylinder 212 in the front-rear direction x. For example, the lens barrel 221 and the connecting cylinder 212 can be threaded together, so when the lens barrel 221 rotates relative to the connecting cylinder 212, the lens barrel 221 can move relative to the connecting cylinder 212 in the front-rear direction x.

[0031] It should be noted that the front-back direction x referred to in this embodiment refers to the direction of the line connecting the light receiving body 10 and the projection body 20, and the direction from back to front is the direction from the light receiving body 10 to the projection body 20, and the direction from front to back is the direction from the projection body 20 to the light receiving body 10.

[0032] Lens assembly 222 is installed inside lens barrel 221, and lens assembly 222 may include a rear fixed group 2221, a zoom group 2222, a compensation group 2223, and a front fixed group 2224 arranged sequentially from back to front. Light entering the connector 211 passes sequentially through the rear fixed group 2221, the zoom group 2222, the compensation group 2223, and the front fixed group 2224 before being emitted to the outside. The zoom group 2222 and the compensation group 2223 are arranged at intervals in the front-rear direction x, and both can move relative to lens barrel 221 in the front-rear direction x.

[0033] It is understandable that by moving the lens assembly 22 in the front-to-back direction x, bringing it closer to or away from the connector 211, the sharpness of the light spot or pattern can be adjusted, thereby achieving the focusing function of the projection tube 100. Furthermore, by moving the zoom group 2222 and the compensation group 2223 in the front-to-back direction x, the combined focal length between different groups can be adjusted to project light spots or patterns of different sizes, thus achieving the zoom function of the projection tube 100.

[0034] For example, the rear fixation group 2221 may include a first biconvex lens, the zoom group 2222 may include a first concave-convex meniscus lens, a first biconcave meniscus lens, and a second biconcave meniscus lens, the compensation group 2223 may include a second biconvex lens and a third biconvex lens, and the front fixation group 2224 may include a second concave-convex meniscus lens and a third concave-convex meniscus lens, wherein light passes sequentially through the first biconvex lens, the first concave-convex meniscus lens, the first biconcave meniscus lens, the second biconcave meniscus lens, the second biconvex lens, the third biconvex lens, the second concave-convex meniscus lens, and the third concave-convex meniscus lens before being emitted to the outside.

[0035] The handwheel assembly 23 includes a focusing handwheel 231 and a zoom handwheel 232. The focusing handwheel 231 is sleeved on the connecting cylinder 212 and fixedly connected to the lens barrel 221. That is, when the focusing handwheel 231 rotates, the lens barrel 221 will rotate together with the focusing handwheel 231, so that the lens barrel 221 will rotate relative to the connecting cylinder 212. Then the lens barrel 221 can move relative to the connecting cylinder 212 in the front-back direction x to achieve focusing adjustment.

[0036] The zoom wheel 232 is mounted on the lens barrel 221. It is understood that when the zoom wheel 232 rotates, it can drive the zoom group 2222 and the compensation group 2223 to move closer together or further apart in the x-direction, thus achieving fine, minute zoom. For example, as... Figures 2-4 , Figure 7 ,as well as Figure 9As shown, the inner wall surface of the zoom handwheel 232 is provided with multiple guide grooves 232A, which are arranged at intervals along the circumference of the zoom handwheel 232. Each guide groove 232A extends along the front-rear direction x. The barrel wall of the lens barrel 221 is provided with multiple sets of spiral groove groups 2212, each spiral groove group 2212 including a first spiral groove 2212A and a second spiral groove 2212B. The zoom group 2222 is provided with multiple first sliding pins 2222A, and the compensation group 2223... A plurality of second sliding pins 2223A are provided. A first sliding pin 2222A is sequentially inserted through a first spiral groove 2212A and a guide groove 232A. A second sliding pin 2223A is sequentially inserted through a second spiral groove 2212B and a guide groove 232A. The distance between the end of the first spiral groove 2212A and the end of the second spiral groove 2212B is less than the distance between the beginning of the first spiral groove 2212A and the beginning of the second spiral groove 2212B. In the exemplary operation, during the rotation of the zoom handwheel 232, the distance between the zoom group 2222 and the compensation group 2223 in the front-back x direction changes, and there are two exemplary working states. In one exemplary working state, when the zoom handwheel 232 is rotated clockwise until the first slide column 2222A moves to the beginning of the first spiral groove 2212A and the second slide column 2223A moves to the beginning of the second spiral groove 2212B, the zoom group 2222 and the compensation group 2223 move further apart in the front-back x direction. In the other exemplary working state, when the zoom handwheel 232 is rotated counterclockwise until the first slide column 2222A moves to the end of the first spiral groove 2212A and the second slide column 2223A moves to the end of the second spiral groove 2212B, the zoom group 2222 and the compensation group 2223 move closer together in the front-back x direction, thereby achieving zoom adjustment. Furthermore, both the first sliding column 2222A and the second sliding column 2223A may include a sliding threaded component and a sleeve. The sleeve is fitted onto the sliding threaded component and slidably disposed within the spiral groove assembly 2212. The sleeve may be made of nylon to reduce friction when it contacts the groove wall of the spiral groove assembly 2212, resulting in smoother, more fluid, and more durable rotation of the zoom handwheel 232. Simultaneously, the nylon sleeve does not generate excessive noise when in contact with the groove wall of the spiral groove assembly 2212, thus improving the user experience.

[0037] Understandably, during use, if the zoom handwheel 232 rotates relative to the connecting tube 212 via the lens barrel 221 and the focusing handwheel 231, the user will need to rotate the focusing handwheel 231 again to refocus after zooming, which will complicate the user's operation and seriously affect the user experience.

[0038] Based on this, the damping between the focusing handwheel 231 and the connecting cylinder 212 in this embodiment is set to be greater than the damping between the zoom handwheel 232 and the lens barrel 221. Thus, when zooming, if the user rotates the zoom handwheel 232, the lens barrel 221 will not rotate relative to the connecting cylinder 212; the lens barrel 221 and the focusing handwheel 231 are in a completely stationary state, thus preventing focus adjustment. Conversely, when focusing, if the user rotates the focusing handwheel 231, the lens barrel 221 will drive the zoom handwheel 232 to rotate synchronously; the zoom handwheel 232 and the lens barrel 221 are in a relatively stationary state, preventing zoom adjustment. This achieves independent focusing and zooming adjustments without interference. Based on this, the projection tube 100 is configured such that when the focus handwheel 231 is driven to rotate, the handwheel assembly 23 and the lens assembly 22 move together in the front-back direction x so that the lens assembly 22 moves closer to or further away from the connector 211, thereby achieving independent focus function; while when the zoom handwheel 232 is driven to rotate, the zoom group 2222 and the compensation group 2223 move closer to or further away in the front-back direction x, and the focus handwheel 231 does not rotate relative to the connector 212, thereby achieving independent zoom function.

[0039] The technical solution of this application achieves focusing by rotating the focusing handwheel 231. Compared with focusing by sliding or pulling, the projection tube 100 in this embodiment allows users to control the focal length change with a smaller amplitude, thus achieving fine and minute focusing and facilitating user operation. Furthermore, based on the damping cooperation between the focusing handwheel 231 and the connecting tube 212, the focusing handwheel 231 can be suspended after focusing is completed, eliminating the need for an additional locking knob to keep the focusing handwheel 231 and the connecting tube 212 relatively fixed, resulting in a simpler structure.

[0040] Furthermore, by setting the damping between the focusing handwheel 231 and the connecting cylinder 212 to be greater than the damping between the zoom handwheel 232 and the lens barrel 221, the focusing handwheel 231 and the lens barrel 221 are kept absolutely stationary when the user rotates the zoom handwheel 232. This prevents the focusing handwheel 231 and the lens barrel 221 from being rotated by the zoom handwheel 232. When the user rotates the focusing handwheel 231, the zoom handwheel 232 is rotated by the lens barrel 221 and remains relatively stationary with respect to the lens barrel 221. This prevents the zoom handwheel 232 from rotating relative to the lens barrel 221. In this way, the focusing function and the zoom function can be kept relatively independent and do not affect each other.

[0041] Please refer to the following: Figures 2-5 In some embodiments, the projection body 20 further includes a first resistance-increasing element 24. The first resistance-increasing element 24 is disposed between the focusing handwheel 231 and the connecting cylinder 212 to increase the damping between the focusing handwheel 231 and the connecting cylinder 212.

[0042] This configuration allows for a direct increase in damping between the focusing handwheel 231 and the connecting cylinder 212 by adding a first resistance-increasing component 24. Compared to filling the space between the focusing handwheel 231 and the connecting cylinder 212 with damping oil, this configuration eliminates the need for a sealing structure to prevent damping oil leakage, resulting in a simpler structure.

[0043] Optionally, the first resistance-increasing component 24 can be a silicone component. The silicone component increases the friction between the focusing handwheel 231 and the connecting cylinder 212, thereby increasing the damping effect between them and preventing slippage during rotation. Furthermore, the excellent elasticity of the silicone component effectively prevents direct collision between the focusing handwheel 231 and the connecting cylinder 212, resulting in smooth rotational damping and improving the user's feel when rotating the focusing handwheel 231.

[0044] During the actual rotation of the focusing handwheel 231, the inner surface of the focusing handwheel 231 may squeeze the silicone component, causing a portion of the silicone component to bulge radially and interfere with the focusing handwheel 231, thus causing the focusing handwheel 231 to jam and become unable to rotate further. To solve this technical problem, please refer to [reference needed]. Figures 2-5 Furthermore, the first resistance-increasing component 24 includes an annular body 241 and a plurality of abutting ribs 242, which are integrally formed. The annular body 241 surrounds the outer periphery of the connecting cylinder 212, and the plurality of abutting ribs 242 are spaced apart on the outer surface of the annular body 241, with each abutting rib 242 extending circumferentially along the annular body 241.

[0045] In this configuration, multiple abutting ribs 242 abut against the inner surface of the focusing handwheel 231. This arrangement ensures that when the focusing handwheel 231 presses against the silicone part, the deformation primarily affects the spaced abutting ribs 242. Each abutting rib 242 has room for deformation along the spacing direction, resulting in an S-shaped deformation along the spacing direction rather than radial deformation along the ring body 241. This effectively prevents the silicone part from being pulled up by the focusing handwheel 231, causing the focusing handwheel 231 to jam and become unable to rotate.

[0046] Please refer to the following: Figures 3-6 In some embodiments, the outer surface of the connecting cylinder 212 is recessed to form a mounting groove 2121, which extends circumferentially along the connecting cylinder 212. The ring body 241 is disposed in the mounting groove 2121, and a plurality of abutting ribs 242 protrude from the opening of the mounting groove 2121 to abut against the inner surface of the focusing handwheel 231.

[0047] In this way, the first resistance-increasing component 24 can be installed in the mounting groove 2121 first. This prevents the first resistance-increasing component 24 from shifting position due to the pressure of the focusing handwheel 231 on the connecting cylinder 212 during the focusing handwheel 231's placement, thus avoiding it detaching from the focusing handwheel 231 and the connecting cylinder 212, effectively improving installation efficiency. Furthermore, during use, the groove wall of the mounting groove 2121 will limit and resist the ring body 241 along the front-rear direction x, effectively reducing the probability of the first resistance-increasing component 24 detaching from the focusing handwheel 231 and the connecting cylinder 212 when the focusing handwheel 231 rotates.

[0048] Please refer to the following: Figure 3 , Figure 4 , Figure 6 as well as Figure 7 In some embodiments, the inner surface of the connecting cylinder 212 is provided with an internal thread structure 2122, and the outer surface of the lens barrel 221 is provided with an external thread structure 2211. The external thread structure 2211 is threadedly connected to the internal thread structure 2122, so that the connecting cylinder 212 and the lens barrel 221 are threadedly engaged. Thus, when the user rotates the focusing handwheel 231, the focusing handwheel 231 will drive the lens barrel 221 to rotate relative to the connecting cylinder 212, allowing the lens barrel 221 to move relative to the connecting cylinder 212 in the front-rear direction x. It can be understood that the length of the external thread structure 2211 in the front-rear direction x defines the stroke of the lens barrel 221 relative to the connecting cylinder 212 in the front-rear direction x.

[0049] The projection body 20 also includes a first limiting member 25, which can be a limiting pin, a limiting threaded member, or the like. In this embodiment, the specific type of the first limiting member 25 is not limited.

[0050] The first limiting member 25 is fixedly inserted through the connecting cylinder 212 and extends into the gap between the outer surface of the lens barrel 221 and the inner surface of the connecting cylinder 212. The first limiting member 25 is used to limit the contact with the external thread structure 2211 to prevent the lens barrel 221 from coming out of the other end of the connecting cylinder 212.

[0051] Understandably, when the user rotates the focusing handwheel 231 beyond a certain extent, the external thread structure 2211 will disengage from the internal thread structure 2122, causing the lens barrel 221 to detach from the other end of the connecting cylinder 212. Therefore, to prevent the lens barrel 221 from detaching from the other end of the connecting cylinder 212, the first limiting member 25 is positioned on the side of the internal thread structure 2122 away from the connecting seat 211. This allows the first limiting member 25 to limit and abut against the external thread structure 2211, thereby preventing the external thread structure 2211 from disengaging from the internal thread structure 2122 and preventing the lens barrel 221 from detaching from the other end of the connecting cylinder 212 due to excessive rotation of the focusing handwheel 231.

[0052] Optionally, the connecting cylinder 212 is provided with a first threaded hole, which penetrates the cylinder wall of the connecting cylinder 212 and is located on the side of the internal thread structure 2122 away from the connecting seat 211.

[0053] The first limiting member 25 includes a first limiting threaded member, which passes through a first threaded hole and extends into the gap between the outer surface of the lens barrel 221 and the inner surface of the connecting cylinder 212. Thus, through the threaded engagement between the first limiting threaded member and the first threaded hole, the first limiting threaded member is fixedly inserted into the connecting cylinder 212, ensuring the stability of the limiting threaded member's limiting contact with the external thread structure 2211.

[0054] Please refer to the following: Figure 3 , Figure 4 , Figure 6 as well as Figure 7 In some embodiments, a portion of the outer surface of the lens barrel 221 is recessed to form a clearance area 2213. The clearance area 2213 is provided adjacent to the external thread structure 2211 in the front-rear direction x. The gap between the outer surface of the lens barrel 221 into which the first limiting member 25 extends and the inner surface of the connecting cylinder 212 is formed by the cooperation between the surface of the clearance area 2213 and the inner surface of the connecting cylinder 212.

[0055] In this embodiment, by providing an avoidance area 2213, the first limiting member 25 can extend into the gap between the lens barrel 221 and the connecting cylinder 212, so that the first limiting member 25 can limit and block the external thread structure 2211. Optionally, the avoidance area 2213 can be provided to extend circumferentially along the lens barrel 221 to facilitate the manufacturing and processing of the lens barrel 221 in the workshop and improve production efficiency.

[0056] Please refer to the following: Figures 2-4 as well as Figure 8 In some embodiments, the focusing handwheel 231 includes a first wheel body 2311, a connecting skirt 2312, and a connector 2313. The first wheel body 2311 serves as the main body of the focusing handwheel 231 and is sleeved on the connecting cylinder 212, and the first resistance-increasing member 24 is disposed between the first wheel body 2311 and the connecting cylinder 212.

[0057] The connecting skirt 2312 extends circumferentially along the first wheel body 2311 and is connected to the side of the first wheel body 2311 away from the connecting seat 211 in the front-rear direction x. The inner wall surface of the connecting skirt 2312 is formed with an abutment groove 2312A, which is open at the rear side in the front-rear direction x.

[0058] The connector 2313 can be a threaded connector or a connecting pin; this embodiment is not limited to either. One end of the connector 2313 is located within the abutment groove 2312A and abuts against the groove wall of the abutment groove 2312A, while the other end is fixedly inserted through the barrel wall of the lens barrel 221, thus achieving a fixed connection between the focusing handwheel 231 and the lens barrel 221. With this configuration, when the user rotates the first wheel body 2311, the connecting skirt 2312 abuts against the connector 2313 through the groove side wall of the abutment groove 2312A, causing the connector 2313 to rotate, which in turn causes the lens barrel 221 to rotate.

[0059] During manufacturing, the focusing handwheel 231 and the lens barrel 221 can be manufactured and produced separately as two separate parts. The structures of the two separate parts are relatively simple, which can effectively reduce manufacturing costs. In the actual installation process, the connector 2313 can be inserted through the barrel wall of the lens barrel 221 to fix the two. Then, the focusing handwheel 231 is sleeved on the connecting cylinder 212 from front to back, and one end of the connector 2313 will enter the abutment groove 2312A from the open rear side. This makes disassembly and assembly convenient and effectively improves disassembly and assembly efficiency.

[0060] Please refer to the following: Figures 1-4 In some embodiments, the projection body 20 further includes a separator 26, which may be a plastic gasket. This embodiment does not limit the specific type of the separator 26. The separator 26 is disposed between the focusing handwheel 231 and the zoom handwheel 232 along the front-rear direction x, so that the focusing handwheel 231 and the zoom handwheel 232 are separated from each other.

[0061] In this embodiment, the focusing handwheel 231 and the zoom handwheel 232 are separated from each other by the separator 26. On the one hand, this ensures that when one of the focusing handwheel 231 and the zoom handwheel 232 rotates, the other will not be driven to rotate, thus ensuring that the focusing and zooming functions are independent. On the other hand, it avoids the contact between the focusing handwheel 231 and the zoom handwheel 232, which would generate friction, thus ensuring the smoothness of the rotation of the focusing handwheel 231 and the zoom handwheel 232.

[0062] Please refer to the following: Figures 1-4 In some embodiments, the projection body 20 further includes a second resistance-increasing element 27, which may be an O-ring. This embodiment does not limit the specific type of the second resistance-increasing element 27. The second resistance-increasing element 27 is disposed between the zoom handwheel 232 and the lens barrel 221 to increase the damping between the zoom handwheel 232 and the lens barrel 221.

[0063] In this way, the second resistance-increasing component 27 can be used to improve the damping feel when the zoom handwheel 232 is rotated, so as to avoid slippage when the user rotates the zoom handwheel 232 and improve the user experience.

[0064] Please refer to the following: Figures 2-4 Optionally, the second resistance-increasing element 27 may include two elements, which are disposed on opposite sides of the zoom handwheel 232 along the front-rear direction x. This can further improve the overall damping feel when the zoom handwheel 232 is rotated, and further prevent the user from slipping when rotating the zoom handwheel 232.

[0065] Please refer to the following: Figures 2-4 as well as Figure 9 In some embodiments, the zoom wheel 232 includes a second wheel body 2321 and a blocking skirt 2323. The second wheel body 2321 serves as the main body of the zoom wheel 232 and is fitted onto the lens barrel 221. The blocking skirt 2323 is connected to the side of the second wheel body 2321 near the zoom wheel 231 in the front-rear direction x, and is used to block the second drag-increasing member 27 and the separator 26 near the zoom wheel 231 in the front-rear direction x.

[0066] This design allows the second drag-increasing component 27 and the separator 26 to be shielded and protected by the skirt 2323, thereby improving the aesthetics of the projection tube 100 and ensuring its durability.

[0067] Please refer to the following: Figures 2-4 Furthermore, a blocking step 2322 is formed on the side of the second wheel body 2321 away from the focusing handwheel 231 in the front-rear direction x. The blocking step 2322 is used to fix and block the second resistance increasing member 27 away from the focusing handwheel 231 in the front-rear direction x.

[0068] This design allows the second resistance-increasing component 27 to be shielded and protected by the shielding step 2322, thereby improving the aesthetics of the projection tube 100 and ensuring its durability.

[0069] Please refer to the following: Figures 1-4 In some embodiments, the light-collecting body 10 includes a light-collecting housing 11 and a light-collecting lens 12. The light-collecting housing 11 is used to carry and mount the light-collecting lens 12, and is used to connect to the film and television light. The light-collecting lens 12 is used to gather the light emitted by the film and television light to improve the utilization rate of the light, and is housed within the light-collecting housing 11. For example, the light-collecting lens 12 may include two plano-convex lenses, which are spaced apart along the front-rear direction x, and the convex surfaces of the two plano-convex lenses are arranged opposite each other along the front-rear direction x. In this way, the light emitted by the film and television light will pass through the two plano-convex lenses in sequence, and be gathered by the light-collecting lens 12 before being directed to the connecting base 211.

[0070] The light-receiving housing 11 and the connecting base 211 are detachably connected, so that the light-receiving body 10 can be detachably connected to the projection body 20. For example, the detachable connection between the light-receiving housing 11 and the connecting base 211 includes at least one of snap-fit, screw-fit, and magnetic connection.

[0071] In this embodiment, the detachable nature of the light-receiving body 10 and the projection body 20 allows the light-receiving body 10 to be removed from the projection body 20 for repair or replacement when needed. Furthermore, the light-receiving body 10 can be detached from the projection body 20 and mounted on the projection body of a fixed-focus projection tube, enabling the fixed-focus projection tube 100 and the zoom projection tube 100 of this application to share a single light-receiving body 10, thus making the projection tube 100 of this embodiment versatile.

[0072] Please refer to the following: Figures 1-4 as well as Figure 10 In some embodiments, the light-receiving housing 11 has a mounting base 112, which includes a base body 1121 and a cover plate 1122. The cover plate 1122 is detachably connected to the side of the base body 1121 near the connecting base 211 in the front-rear direction x, so as to cooperate with the base body 1121 to form a mounting space for accommodating the light-receiving lens 12.

[0073] With this setup, when the light-collecting lens 12 is damaged and needs to be replaced or repaired, the light-collecting body 10 can be removed from the projection body 20 first, then the cover plate 1122 can be removed from the base 1121, and finally the light-collecting lens 12 can be removed from the base 1121, thus achieving a complete disassembly process that is easy to operate.

[0074] Please refer to the following: Figures 1-4 , Figure 6 as well as Figure 10 In some embodiments, the connector 211 has a slot 2111, which includes an insertion section 2111A and a snap-fit ​​section 2111B. The insertion section 2111A extends along the front-rear direction x, and the snap-fit ​​section 2111B extends along the circumferential direction of the light-receiving housing 11. The insertion section 2111A communicates with the snap-fit ​​section 2111B. The light-receiving housing 11 is provided with a locking block 111, which is formed on the inner surface of the light-receiving housing 11.

[0075] When the light-receiving body 10 needs to be installed on the projection body 20, the light-receiving housing 11 is first moved relative to the connecting seat 211 in the front-back direction x, so that the locking block 111 can enter the insertion section 2111A in the front-back direction x. Then, the light-receiving housing 11 rotates relative to the connecting seat 211, so that the locking block 111 enters the locking section 2111B, thereby allowing the groove wall of the locking section 2111B to restrict the movement of the locking block 111 in the front-back direction x. Similarly, when the light-receiving body 10 needs to be removed from the projection body 20, the light-receiving housing 11 is first rotated in the opposite direction relative to the connecting seat 211, so that the locking block 111 moves from the locking section 2111B to the insertion section 2111A. Then, the light-receiving housing 11 is moved in the opposite direction relative to the connecting seat 211 in the front-back direction x, so that the locking block 111 disengages from the insertion section 2111A in the front-back direction x.

[0076] This design allows for quick assembly and disassembly between the light-receiving body 10 and the projection body 20, making operation convenient and the structure simple, effectively reducing the manufacturing cost of the projection tube 100.

[0077] Please refer to the following: Figures 1-4 , Figure 6 as well as Figure 10 Furthermore, a limiting rib 2112 is provided near the insertion section 2111A of the connecting seat 211. The limiting rib 2112 extends along the axial direction of the connecting seat 211 and encloses to form a limiting notch 2112A.

[0078] The light-receiving body 10 also includes a second limiting member 13. The second limiting member 13 can be a limiting threaded part or a limiting pin, etc. This embodiment does not specifically limit the type of the second limiting member 13. The second limiting member 13 can be sequentially inserted into the light-receiving housing 11 and the limiting notch 2112A to limit and abut against the limiting rib 2112 in the axial direction of the connecting seat 211, so as to restrict the movement of the connecting seat 211 in the circumferential direction.

[0079] Understandably, after the locking block 111 enters the locking section 2111B, the second limiting member 13 can be sequentially inserted through the light-receiving housing 11 and the limiting notch 2112A, thus preventing the locking block 111 from moving from the locking section 2111B to the insertion section 2111A, thereby limiting the connection seat 211 in the circumferential direction of the second limiting member 13. When it is necessary to remove the light-receiving body 10 from the projection body 20, the second limiting member 13 is first disengaged from the limiting notch 2112A and the light-receiving housing 11, and then the locking block 111 can move from the locking section 2111B to the insertion section 2111A. This design further ensures the stability of the light-receiving body 10 and the projection body 20 in the connected state, preventing accidental disengagement and ensuring user safety. At the same time, disassembly and assembly are quick and convenient, improving the user experience.

[0080] Optionally, the second limiting member 13 includes a second limiting threaded member, which passes through and is screwed to the light-collecting housing 11, and its end passes through the limiting notch 2112A. This improves the stability of the second limiting threaded member in limiting and abutting against the limiting rib 2112.

[0081] Please refer to the following: Figures 1-4 as well as Figure 10 In some embodiments, the light-receiving body 10 further includes a connecting frame 14, which may be U-shaped. The connecting frame 14 is connected to the outer wall of the light-receiving housing 11 and is used to connect to a lamp holder (not shown in the figure).

[0082] Understandably, with the film and television light connected to the light-receiving housing 11, the light-receiving body 10 is positioned between the projection body 20 and the film and television light along the front-back direction x. Therefore, when the connecting frame 14 is connected to the light-receiving body 10, the connection position between the connecting frame 14 and the light-receiving body 10 can be made as close as possible to the center of the overall film and television light device along the front-back direction x, thereby reducing the torque of gravity on the overall film and television light device. Thus, during the adjustment of the film and television light's orientation, when the light-receiving body 10 can rotate freely relative to the connecting frame 14, the overall rotation amplitude of the film and television light device is small, resulting in a smaller torque required for user operation, making operation easier and reducing the difficulty of operation.

[0083] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" 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 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0084] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A projection tube for use with a film and television light, characterized in that, It includes a light-receiving body and a projection body, the light-receiving body being used to connect to the video light, and the projection body including: The main component includes a connecting seat and a connecting cylinder. The connecting seat is connected and communicates with the light-receiving body, and one end of the connecting cylinder is fixedly inserted through the connecting seat. A lens assembly includes a lens barrel and a lens group. The lens barrel passes through a connecting tube and is movable relative to the connecting tube in a front-rear direction. The lens group is disposed within the lens barrel and includes a zoom group and a compensation group. The zoom group and the compensation group are spaced apart in the front-rear direction and are both movable relative to the lens barrel in the front-rear direction. The handwheel assembly includes a focusing handwheel and a zoom handwheel. The focusing handwheel is sleeved on the connecting cylinder and fixedly connected to the lens barrel, and the zoom handwheel is sleeved on the lens barrel. The damping between the focusing handwheel and the connecting cylinder is greater than the damping between the zoom handwheel and the lens barrel, such that the projection barrel is configured such that when the focusing handwheel is rotated, the handwheel assembly and the lens assembly move together in the front-back direction to bring the lens assembly closer to or away from the connecting base; while when the zoom handwheel is rotated, the zoom group and the compensation group move closer to or away from each other in the front-back direction, and the focusing handwheel does not rotate relative to the connecting cylinder. The inner surface of the connecting cylinder is provided with an internal thread structure, and the outer surface of the lens barrel is provided with an external thread structure. The external thread structure is threadedly connected to the internal thread structure to enable threaded engagement between the connecting cylinder and the lens barrel. The projection body also includes a first limiting member, which is fixedly inserted through the connecting cylinder and extends into the gap between the outer surface of the lens barrel and the inner surface of the connecting cylinder. The first limiting member is used to limit and abut against the external thread structure to prevent the lens barrel from coming out of the other end of the connecting cylinder. A portion of the outer surface of the lens barrel is recessed to form a clearance area, which is located adjacent to the external thread structure along the front-back direction. The first limiting member is fixedly inserted through the clearance area. The focusing handwheel includes a first wheel body, a connecting skirt, and a connector. The first wheel body is fitted onto the connecting cylinder. The connecting skirt extends circumferentially along the first wheel body and is connected to the side of the first wheel body away from the connecting seat in the front-rear direction. An abutment groove is formed on the inner wall of the connecting skirt. The abutment groove is open on the rear side in the front-rear direction. One end of the connector is located in the abutment groove and abuts against the groove wall. The other end is fixedly inserted through the cylinder wall of the lens barrel.

2. The projection tube as described in claim 1, characterized in that, The projection body also includes: A first resistance-increasing component is disposed between the focusing handwheel and the connecting cylinder to increase the damping between the focusing handwheel and the connecting cylinder.

3. The projection tube as described in claim 2, characterized in that, The first resistance-enhancing component is a silicone component and includes: An annular body, surrounding the outer periphery of the connecting cylinder; and Multiple abutting ribs are spaced apart on the outer surface of the ring body, and each of the abutting ribs extends circumferentially along the ring body; Among them, multiple of the abutting ribs abut against the inner surface of the focusing handwheel.

4. The projection tube as described in claim 3, characterized in that, The outer surface of the connecting cylinder is recessed to form an installation groove, which extends circumferentially along the connecting cylinder. The ring body is disposed in the mounting groove, and the plurality of abutting ribs protrude from the groove opening of the mounting groove to abut against the inner surface of the focusing handwheel.

5. The projection tube as described in claim 2, characterized in that, The projection body also includes a separator, which is disposed between the focusing handwheel and the zoom handwheel along the front-back direction, so as to separate the focusing handwheel and the zoom handwheel from each other; And / or, the projection body further includes a second resistance-increasing component, which is disposed between the zoom handwheel and the lens barrel to increase the damping between the zoom handwheel and the lens barrel.

6. The projection tube as described in any one of claims 1-5, characterized in that, The light-collecting body includes a light-collecting housing and a light-collecting lens. The light-collecting housing is used to connect with the video light, and the light-collecting lens is housed inside the light-collecting housing. The light-collecting housing and the connecting base are detachably connected, so that the light-collecting body can be detachably connected to the projection body.

7. The projection tube as described in claim 6, characterized in that, The connector has a slot, which includes an insertion section and a snap-fit ​​section that are connected to each other, and the light-receiving housing is provided with a snap-fit ​​block; The card block can enter the insertion section along the front-back direction. Then, the light-receiving housing rotates relative to the connecting seat so that the card block enters the snap-fit ​​section, thereby allowing the groove wall of the snap-fit ​​section to restrict the movement of the card block in the front-back direction.

8. The projection tube as described in claim 7, characterized in that, The connector is provided with a limiting rib near the insertion section. The limiting rib extends circumferentially along the connector and encloses a limiting notch. The light-receiving body also includes a second limiting member, which can be sequentially inserted into the light-receiving housing and the limiting notch to limit and abut against the limiting rib in the circumferential direction of the connecting seat.

9. A film and television lighting device, characterized in that, include: Projection tube as described in any one of claims 1-8; and A video light is connected to the light-receiving body. The light emitted by the film and television light passes through the light-receiving body and the projection body in sequence before being projected outward.

Images