A focusing ring structure for a focusing lens

Abstract

The utility model relates to technical field of lens, concretely is a focusing ring structure for focusing lens, include: set up between fixed lens and movable lens zoom ring, the outer surface of zoom ring is provided with fixed ring, and the left and right sides of fixed ring outer surface all are fixedly connected with extension block, and the side wall of extension block is opened and has installation groove, beneficial effect is: through fixed ring can pass through the connecting thread column on extension block and adjust connecting nut cooperation, adjust support spacing, stably install in different outer diameter fixed lens, the combination of fixed ring cooperation groove and connecting bolt, can depend on lens length or zoom ring installation position adjustment bolt fixed point, adapt to different axial size lens assembly, promote versatility, fixed ring and connecting block are detachably connected through the positioning bolt, when zoom ring size or connection mode changes, only need to dismount the positioning bolt to replace corresponding specification connecting block, do not need to replace whole fixed ring or extension block, reduce cost and operation complexity.

Description

Technical Field

[0001] This utility model relates to the field of lens technology, specifically to a focusing ring structure for a focusing lens. Background Technology

[0002] A focusing lens is a camera lens that can change its focal length within a certain range to obtain different field of view, different image sizes, and different ranges of objects. A focusing lens can change the shooting range by changing the focal length without changing the shooting distance, which is very beneficial for image composition.

[0003] Chinese utility model patent CN219642000U discloses a focusing ring and lens focusing structure, comprising several components. These components are joined together circumferentially to form a ring, and adjacent components are locked together by screws. This utility model allows for convenient and efficient assembly and disassembly of the main lens barrel, unaffected by the size of the front and rear lens elements, thus contributing to the structural stability of the main lens barrel.

[0004] However, the device still has limitations in terms of adaptability and universality when used for different main lens barrel sizes. The cost of customizing individual parts is high, and wear and tear on related connecting parts or the need to change the connection method will increase costs or make it impossible to use. Utility Model Content

[0005] The purpose of this invention is to provide a focusing ring structure for a focusing lens to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a focusing ring structure for a focusing lens, comprising: a zoom ring disposed between a fixed lens and a movable lens; a fixed ring disposed on the outer surface of the zoom ring; extension blocks fixedly connected to both sides of the outer surface of the fixed ring; mounting grooves formed on the side walls of the extension blocks; connecting threaded posts rotatably connected to the inner surfaces of the mounting grooves; adjusting connecting nuts threadedly connected to the outer surfaces of the connecting threaded posts; a mating groove formed on the upper surface of the fixed ring; a connecting bolt disposed inside the mating groove; connecting blocks detachably connected to the fixed ring via positioning bolts; and gear engaging blocks fixedly connected between each of the two adjacent connecting blocks. The connecting blocks provide fixed support for the gear engaging blocks, ensuring the stable position of the gear engaging blocks and enabling stable engagement with the zoom ring to assist in focusing.

[0007] Preferably, the connecting bolt extends into the interior of the zoom ring, and the size of the gear engagement block corresponds to the size of the zoom ring. This dimensional correspondence ensures that the gear engagement block can fully fit with the zoom ring, guaranteeing engagement stability, preventing jamming during focusing, and improving adjustment smoothness.

[0008] Preferably, the number of mating grooves corresponds to the number of fixing rings, and the gear fitting blocks are symmetrically arranged on the upper and lower sides of the outer surface of the zoom ring. The corresponding dimensions ensure that the gear fitting blocks can fit completely with the zoom ring, guaranteeing fitting stability, avoiding jamming during focusing, and improving adjustment smoothness.

[0009] Preferably, the upper surfaces of the adjusting connecting nut and the extension block abut against each other. This abutment restricts the axial movement of the connecting threaded post, preventing it from shifting during operation and ensuring a stable fit between the connecting threaded post and the adjusting connecting nut.

[0010] Preferably, the connecting threaded posts are symmetrically arranged on the left and right sides of the outer surface of the zoom ring, and a flange connecting seat is fixedly connected to the rear surface of the lens. The symmetrical arrangement ensures that the adjustment force on the left and right sides of the zoom ring is balanced, making it less likely for the lens to tilt during focusing operations and improving the stability of the adjustment process.

[0011] Preferably, the gear engagement block is located on the front surface of the fixed ring, and the upper and lower adjacent extension blocks are arranged parallel to each other. The parallel layout ensures that the adjusting components on the extension blocks can apply force to the zoom ring synchronously, avoiding uneven local force and maintaining stable focusing.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a fixing ring that engages with the connecting threaded post on the extension block and an adjusting connecting nut to adjust the support spacing, ensuring stable installation on fixed lenses of different outer diameters. The mating groove on the fixing ring, combined with the connecting bolt, allows adjustment of the bolt fixing point according to the lens length or zoom ring installation position, adapting to lens assemblies of different axial dimensions and improving versatility. The fixing ring and connecting block are detachably connected via positioning bolts. When the zoom ring size or connection method changes, only the positioning bolts need to be removed to replace the corresponding specification connecting block, eliminating the need to replace the entire fixing ring or extension block, thus reducing costs and operational complexity. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the overall structure of this utility model; Figure 2 This is a front view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the overall structure of this utility model; Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0014] In the diagram: 1. Fixed lens; 2. Flange connector; 3. Positioning bolt; 4. Extension block; 5. Mounting groove; 6. Connecting threaded post; 7. Zoom ring; 8. Movable lens; 9. Adjusting connecting nut; 10. Fixing ring; 11. Connecting block; 12. Mating groove; 13. Connecting bolt; 14. Gear engaging block. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] Example 1: Reference Figures 1 to 3A focusing ring structure for a focusing lens includes: a zoom ring 7 disposed between a fixed lens 1 and a movable lens 8; a fixing ring 10 is provided on the outer surface of the zoom ring 7 to provide a mounting base and support subsequent components such as an extension block 4; to improve overall stability, extension blocks 4 are fixedly connected to both sides of the outer surface of the fixing ring 10; the extension blocks 4 provide space for a mounting groove 5 through their own structure, providing operating space for connecting threaded posts 6; the sidewalls of the extension blocks 4 have mounting grooves 5 for connecting threaded posts 6. The mounting groove 5 provides a rotatable mounting position, restricting the radial movement of the threaded connecting post 6. The inner surface of the mounting groove 5 is rotatably connected to the threaded connecting post 6. The threaded connecting post 6 guides the movement of the adjusting connecting nut 9 by engaging with its thread. The outer surface of the threaded connecting post 6 is threadedly connected to the adjusting connecting nut 9. The adjusting connecting nut 9 restricts the axial movement of the threaded connecting post 6 by abutting against the upper surface of the extension block 4. The upper surface of the retaining ring 10 has a mating groove 12, which provides space for the connecting bolt 13 to be received and installed, ensuring that the connecting bolt 13 can be stably connected to the fixed bolt. The fixed ring 10 and zoom ring 7 are fitted with a connecting bolt 13 inside the mating groove 12. The connecting bolt 13 extends through the mating groove 12 into the zoom ring 7, achieving initial positioning of the fixed ring 10 and zoom ring 7. The fixed ring 10 is detachably connected to the connecting block 11 via the positioning bolt 3. During assembly, the positioning bolt 3 passes through the pre-set bolt holes of the fixed ring 10 and the corresponding mounting holes of the connecting block 11 in sequence. Through the tightening action of the threaded engagement, the connecting block 11 is tightly and stably fixed in the designated position of the fixed ring 10, effectively preventing the connecting block 11 from being damaged by vibration or force during lens focusing. If the connecting block 11 becomes loose or displaced due to factors such as these, when it needs to be replaced later, simply use the adapter tool to loosen and remove the positioning bolt 3 to separate the old connecting block 11 from the fixing ring 10. Then, align the new connecting block 11 with the installation position and retighten the positioning bolt 3. The entire operation does not require disassembling the fixing ring 10 and other related components, which greatly reduces the difficulty and time cost of maintenance and replacement. Gear fitting blocks 14 are fixedly connected between the two adjacent connecting blocks 11 on the left and right sides. The connecting block 11 provides fixed support for the gear fitting blocks 14, so that the gear fitting blocks 14 can accurately cooperate with the zoom ring 7.

[0017] Reference Figures 1 to 4The connecting bolt 13 extends into the interior of the zoom ring 7. Through the connecting action of the connecting bolt 13, the circumferential displacement of the zoom ring 7 relative to the fixed ring 10 can be restricted. The size of the gear fitting block 14 corresponds to the size of the zoom ring 7. The corresponding size ensures that the gear fitting block 14 can completely fit with the outer surface structure of the zoom ring 7 to achieve stable fitting. The number of mating grooves 12 corresponds to the number of fixed rings 10. The corresponding number ensures that each fixed ring 10 has enough mating grooves 12 to install the connecting bolt 13, ensuring connection balance. The gear fitting blocks 14 are symmetrically arranged on the upper and lower sides of the outer surface of the zoom ring 7. The symmetrical arrangement makes the fitting force on the zoom ring 7 uniform and avoids offset during adjustment. The upper surfaces of the adjusting connecting nut 9 and the extension block 4 abut against each other. The abutting state can lock the connecting bolt. The position of the threaded post 6 prevents the threaded post 6 from rotating during lens operation. The threaded post 6 is symmetrically arranged on the left and right sides of the outer surface of the zoom ring 7. The symmetrical arrangement ensures that the force on the left and right sides of the zoom ring 7 is consistent, ensuring a smooth adjustment process. The rear surface of the fixed lens 1 is fixedly connected to the flange connecting seat 2. The flange connecting seat 2 is used to stably connect the fixed lens 1 to external equipment (such as camera body). The gear engagement block 14 is located on the front surface of the fixed ring 10. This position allows the gear engagement block 14 to directly contact the zoom ring 7, better playing its positioning and auxiliary adjustment role. The positions of the two adjacent upper and lower extension blocks 4 are arranged parallel to each other. The parallel arrangement ensures that the threaded post 6 on the extension block 4 and the adjusting connecting nut 9 can apply force to the zoom ring 7 synchronously, maintaining adjustment stability.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A focusing ring structure for a focusing lens, characterized in that: The system includes a zoom ring (7) positioned between a fixed lens (1) and a movable lens (8). A fixing ring (10) is provided on the outer surface of the zoom ring (7). Extension blocks (4) are fixedly connected to both sides of the outer surface of the fixing ring (10). Mounting grooves (5) are formed on the sidewalls of the extension blocks (4). A connecting threaded post (6) is rotatably connected to the inner surface of the mounting groove (5). An adjusting connecting nut (9) is threaded onto the outer surface of the connecting threaded post (6). A mating groove is formed on the upper surface of the fixing ring (10). 12), the interior of the mating groove (12) is provided with connecting bolts (13), the fixing ring (10) is detachably connected to the connecting block (11) by the positioning bolt (3), and the left and right adjacent connecting blocks (11) are fixedly connected with gear fitting blocks (14); the connecting bolts (13) extend into the interior of the zoom ring (7), and the size of the gear fitting block (14) is set in accordance with the size of the zoom ring (7); the number of mating grooves (12) is set in accordance with the number of fixing rings (10), and the gear fitting blocks (14) are symmetrically arranged on the upper and lower sides of the outer surface of the zoom ring (7).

2. The focusing ring structure for a focusing lens according to claim 1, characterized in that: The upper surfaces of the adjusting connecting nut (9) and the extension block (4) abut against each other.

3. The focusing ring structure for a focusing lens according to claim 2, characterized in that: The connecting threaded post (6) is symmetrically arranged on the left and right sides of the outer surface of the zoom ring (7), and the rear surface of the fixed lens (1) is fixedly connected to the flange connecting seat (2).

4. The focusing ring structure for a focusing lens according to claim 3, characterized in that: The gear fitting block (14) is located on the front surface of the fixed ring (10), and the positions of the two adjacent extension blocks (4) are arranged parallel to each other.

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