Symmetric ring adjusting structure of widening lens

Abstract

The utility model discloses a symmetrical ring adjusting structure of a widening lens, which is characterized in that a connecting ring is connected with a widening assembly, and a bearing is respectively connected with a mother lens shell and the connecting ring; an arc-shaped first mounting groove and a plurality of second mounting grooves are formed in the outer side of the mother mirror shell in the circumferential direction, and a plurality of connecting holes are formed in the outer side of the connecting ring in the circumferential direction; the adjusting mechanism comprises a first clamping block, an adjusting rod, an adjusting piece, a worm and gear structure and a driving gear. The locking mechanism comprises a second clamping block, a locking screw rod and a locking head; the first clamping block is arranged in the first mounting groove, the adjusting piece is in sliding connection with the first clamping block, and the adjusting rod is connected with the adjusting piece; the worm and gear structure is fixedly connected with the first clamping block, the driving gear is connected with the worm and gear structure, and the driving gear is meshed with the adjusting piece; the second clamping block is arranged in the second mounting groove, and the locking head is connected with the connecting ring. Through the design, the problems of imaging distortion, image imbalance and the like can be effectively reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of optical imaging technology, specifically a variable-width lens symmetry ring adjustment structure. Background Technology

[0002] In the field of optical imaging, zoom lenses are widely used in high-precision imaging scenarios such as cinematography, industrial inspection, and professional videography due to their ability to adjust the aspect ratio and adapt to different shooting scenarios. One of the core performance indicators of zoom lenses is the stability of the imaging symmetry circle, which directly determines key parameters such as edge distortion and the consistency of imaging between the center and the edges. With the increasing industrialization of the film and television industry and the growing demand for precision optical inspection, the industry has placed higher requirements on the precise adjustment and long-term stability of the imaging symmetry circle during the production and assembly process of zoom lenses. How to efficiently adjust and lock the imaging symmetry circle in the production process has become an important technical direction affecting the mass production accuracy and reliability of zoom lenses.

[0003] Currently, the adjustment and fixation of the imaging symmetry ring during the production and assembly of zoom lenses faces significant technical bottlenecks. Traditional processes rely on manual rotation of the lens assembly to align the symmetry ring, lacking micro-adjustment mechanisms. This results in repeated adjustments failing to achieve optimal symmetry, leading to low production efficiency and poor consistency. Furthermore, existing locking structures often employ simple threaded fastening or adhesive bonding, which are susceptible to displacement of the connecting ring and symmetry ring shift due to vibrations during production and transportation, and thermal expansion and contraction during long-term use. This causes distortion of the already calibrated imaging symmetry ring before delivery or in the early stages of use, with horizontal / vertical imbalances exceeding 10%, severely impacting lens yield and actual performance. These problems are particularly pronounced in mass production, necessitating structural innovation to achieve precise micro-adjustment and reliable locking of the imaging symmetry ring during the production process. Utility Model Content

[0004] The purpose of this invention is to provide a symmetry ring adjustment structure for a variable-width lens, in order to solve the following technical problems mentioned in the background art:

[0005] Traditional processes rely on rotating lens components to align the symmetry ring, but lack micro-adjustment mechanisms. This results in the inability to achieve optimal symmetry even after multiple adjustments, leading to low production efficiency and poor consistency.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A symmetrical adjustment structure for a zoom lens is disclosed. The adjustment structure is positioned between the zoom lens assembly and the main lens housing, and includes a bearing, a connecting ring, an adjustment mechanism, and a locking mechanism. The connecting ring is connected to the zoom lens assembly, and the bearing is connected to both the main lens housing and the connecting ring. The main lens housing has an arc-shaped first mounting groove and several second mounting grooves circumferentially on its outer side, and the connecting ring has several connecting holes circumferentially on its outer side. The adjustment mechanism includes a first locking block, an adjustment rod, an adjustment component, a worm gear structure, and a drive gear. The locking mechanism includes a second locking block, a locking screw, and a locking head. The first locking block is positioned within the first mounting groove, and the adjustment component is slidably connected to it. One side of the adjustment component has meshing teeth, and the adjustment rod is connected to the adjustment component. The worm gear structure is fixedly connected to the first locking block, and the drive gear is connected to the worm gear structure, meshing with the adjustment component. The second locking block is positioned within the second mounting groove, and the locking head is connected to the connecting ring. The locking screw connects the second locking block to the connecting ring.

[0008] Furthermore, the spacing between adjacent connecting holes is 5°, and the spacing between the two ends of the first mounting groove is 15°.

[0009] Furthermore, the first locking block is provided with an adjusting groove, the bottom of the adjusting component is fixedly connected to a sliding block, the sliding block is slidably connected to the adjusting groove, the top of the adjusting rod is fixedly connected to the slider, and the adjusting rod is connected to the adjusting component through the sliding block.

[0010] Furthermore, there are two adjusting rods, which are symmetrically arranged on both sides of the sliding block, and both adjusting rods are connected to the connecting holes.

[0011] Furthermore, the worm gear structure includes a mounting box, a worm gear, and a worm. The mounting box is fixedly connected to the first locking block, and both the worm gear and the worm are rotatably connected inside the mounting box. The worm gear meshes with the worm, and the worm gear is fixedly connected to the drive gear through a connecting shaft.

[0012] Furthermore, one end of the worm gear extends out of the mounting box and is fixedly connected to a rotating head.

[0013] Furthermore, hexagonal holes are provided on the rotating head.

[0014] Furthermore, a connecting post is fixedly connected to the bottom of the mounting box, and the connecting post is fixedly connected to the first locking block. The mounting box is connected to the first locking block through the connecting post.

[0015] Furthermore, the locking head is bolted to the connecting ring.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The adjustment mechanism of this invention can fine-tune the imaging symmetry ring, achieving and maintaining optimal symmetry in lens imaging. This effectively reduces imaging distortion and image imbalance, improves production efficiency, and enhances product consistency. The locking mechanism securely fixes the connecting ring, preventing displacement of the imaging symmetry ring due to equipment movement, vibration, or other external interference, ensuring that the lens maintains good imaging symmetry characteristics throughout long-term use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the use of this utility model;

[0019] Figure 2 This is a cross-sectional view of the present invention in use;

[0020] Figure 3 This is one of the schematic diagrams of the adjustment mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the locking mechanism of this utility model;

[0022] Figure 5 This is one of the cross-sectional schematic diagrams of the adjustment mechanism of this utility model;

[0023] Figure 6 This is the second cross-sectional schematic diagram of the adjustment mechanism of this utility model;

[0024] Figure 7 This is the second schematic diagram of the adjustment mechanism of this utility model;

[0025] Figure 8 This is the third schematic diagram of the adjustment mechanism of this utility model.

[0026] The markings in the diagram are: 1-widening assembly, 2-mounting groove, 3-matrix housing, 4-locking mechanism, 5-adjusting mechanism, 6-connecting ring, 7-bearing, 8-adjusting rod, 9-first locking block, 10-adjusting component, 11-connecting column, 12-mounting box, 13-locking screw, 14-second locking block, 15-locking head, 16-adjusting slide, 17-sliding block, 18-rotating head, 19-worm gear, 20-worm wheel, 21-adjusting gear. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example:

[0029] A symmetrical adjustment structure for a zoom lens is provided, the adjustment structure being disposed between the zoom lens assembly 1 and the main lens housing 3, including a bearing 7, a connecting ring 6, an adjustment mechanism 5, and a locking mechanism 4; the connecting ring 6 is connected to the zoom lens assembly 1, and the bearing 7 is connected to both the main lens housing 3 and the connecting ring 6; the outer circumferential side of the main lens housing 3 is provided with an arc-shaped first mounting groove 2 and several second mounting grooves, and the outer circumferential side of the connecting ring 6 is provided with several connecting holes; the adjustment mechanism 5 includes a first locking block 9, an adjustment rod 8, an adjustment component 10, a worm gear structure, and a drive gear 21; the locking mechanism... The structure 4 includes a second locking block 14, a locking screw 13, and a locking head 15; the first locking block 9 is disposed in the first mounting groove 2, the adjusting member 10 is slidably connected to the first locking block 9, one side of the adjusting member 10 is provided with meshing teeth, and the adjusting rod 8 is connected to the adjusting member 10; the worm gear structure is fixedly connected to the first locking block 9, the drive gear 21 is connected to the worm gear structure, and the drive gear 21 meshes with the adjusting member 10; the second locking block 14 is disposed in the second mounting groove, and the locking head 15 is connected to the connecting ring 6; the locking screw 13 is used to connect the second locking block 14 and the connecting ring 6.

[0030] Specifically, in use, the imaging symmetry ring is initially aligned by manually rotating the connecting ring 6. Since the connecting ring 6 is connected to the widening assembly 1, rotating the connecting ring 6 changes the positional relationship of the widening assembly 1 relative to the mother mirror housing 3, thus affecting the state of the imaging symmetry ring. The imaging symmetry ring is then manually adjusted to a suitable position range by visual observation or with the aid of relevant imaging detection equipment. After manual alignment, the adjustment structure is installed in the corresponding position, and the adjusting rod 8 is inserted into the circumferentially oriented connecting hole on the outer side of the connecting ring 6. Next, further fine-tuning is performed using the worm gear mechanism. The worm gear mechanism is activated, causing the drive gear 21 to rotate. Since there is a meshing relationship between the drive gear 21 and the adjusting component 10, the rotation of the drive gear 21 drives the adjusting component 10 to move accordingly. The adjusting component 10 is connected to the adjusting rod 8, and the movement of the adjusting component 10 causes the adjusting rod 8 to move accordingly, ultimately causing the connecting ring 6 to rotate. Through this series of transmission processes, the connecting ring 6 changes position again, thereby further fine-tuning the imaging symmetry ring to find the optimal symmetrical imaging ring, achieving a more precise adjustment effect and meeting the stringent requirements of high-quality imaging for the lens symmetry ring. Figure 1 , Figure 2As shown, after the optimal symmetrical imaging ring is found through the operation of the adjustment mechanism 5, the locking mechanism 4 is installed in the corresponding position. Through components such as the locking screw 13 in the locking mechanism 4, the second locking block 14 located in the second mounting groove of the mother mirror housing 3 is connected and fixed to the connecting ring 6. Specifically, by operating the locking screw 13, the second locking block 14 is tightly pressed against the inner wall of the second mounting groove of the mother mirror housing 3, while the locking head 15 and the connecting ring 6 are tightly engaged. In this way, the connecting ring 6 is firmly locked, preventing displacement and ensuring that the adjusted optimal symmetrical imaging ring can be stably maintained. This avoids changes in the position of the imaging symmetry ring due to various external forces during subsequent use, such as... Figure 4 As shown.

[0031] In a preferred embodiment, the spacing between adjacent connecting holes is 5°, and the spacing between the two ends of the first mounting groove 2 is 15°. This design ensures that the angle can be precisely adjusted via the adjusting rod 8, thereby facilitating the identification of the optimal imaging symmetry circle.

[0032] In a preferred embodiment, an adjusting groove 16 is provided in the first locking block 9, a sliding block 17 is fixedly connected to the bottom of the adjusting member 10, the sliding block 17 is slidably connected to the adjusting groove 16, the top of the adjusting rod 8 is fixedly connected to the slider, and the adjusting rod 8 is connected to the adjusting member 10 through the sliding block 17. Figure 5 As shown.

[0033] In a preferred embodiment, two adjusting rods 8 are provided, symmetrically arranged on both sides of the sliding block 17, and both adjusting rods 8 are connected to the connecting holes. By adjusting the cooperation of the sliding groove 16 and the sliding block 17, the connection between the adjusting rod 8 and the adjusting component 10 is made more stable and the transmission can be smoothly realized, ensuring smooth adjustment operation and facilitating the adjustment of the symmetry ring of the widening lens.

[0034] In a preferred embodiment, the worm gear structure includes a mounting box 12, a worm gear 20, and a worm 19. The mounting box 12 is fixedly connected to the first locking block 9. Both the worm gear 20 and the worm 19 are rotatably connected within the mounting box 12. The worm gear 20 meshes with the worm 19. The worm gear 20 is fixedly connected to the drive gear 21 via a connecting shaft. Figure 6 As shown. The mounting box 12 provides mounting support for the worm gear 20 and worm 19. The meshing of the worm gear 20 and worm 19 and the connection with the drive gear 21 can realize stable and reliable speed reduction and torque increase transmission, which facilitates the control of the movement of the adjusting component 10, and thus accurately adjusts the symmetry ring of the widening lens.

[0035] In a preferred embodiment, one end of the worm gear 19 extends outside the mounting box 12 and is fixedly connected to a rotating head 18. Further optimized, the rotating head 18 is provided with a hexagonal hole, such as... Figure 6As shown. The rotating head 18 extending from the mounting box 12 of the worm gear 19 facilitates the application of external force to drive the worm gear 19 to rotate. The hexagonal hole facilitates operation with an Allen wrench, making it easier to adjust the symmetry ring of the zoom lens.

[0036] In a preferred embodiment, a connecting post 11 is fixedly connected to the bottom of the mounting box 12, and the connecting post 11 is fixedly connected to the first locking block 9. The mounting box 12 is connected to the first locking block 9 through the connecting post 11. Figure 3 As shown. The mounting box 12 is connected to the first locking block 9 via the connecting column 11, making the mounting box 12 more secure, ensuring the stable operation of the worm gear structure, and facilitating accurate adjustment of the symmetry ring of the widening lens.

[0037] In a preferred embodiment, the locking head 15 is bolted to the connecting ring 6. The bolted connection facilitates the installation and removal of the locking head 15 and the connecting ring 6, and helps the locking mechanism 4 to stably fix the connecting ring 6, ensuring the stable position of the zoom lens symmetry ring.

[0038] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] 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 symmetric ring adjustment structure of a zoom lens, the adjustment structure being disposed between a zoom assembly (1) and a mother lens housing (3), characterized in that: It includes a bearing (7), a connecting ring (6), an adjusting mechanism (5), and a locking mechanism (4); the connecting ring (6) is connected to the widening assembly (1), and the bearing (7) is connected to the mother mirror housing (3) and the connecting ring (6) respectively; the mother mirror housing (3) has an arc-shaped first mounting groove (2) and several second mounting grooves on its outer circumference, and the connecting ring (6) has several connecting holes on its outer circumference; The adjustment mechanism (5) includes a first locking block (9), an adjustment rod (8), an adjustment component (10), a worm gear structure, and a drive gear (21); the locking mechanism (4) includes a second locking block (14), a locking screw (13), and a locking head (15); The first locking block (9) is set in the first mounting groove (2), the adjusting member (10) is slidably connected to the first locking block (9), one side of the adjusting member (10) is provided with meshing teeth, and the adjusting rod (8) is connected to the adjusting member (10); the worm gear structure is fixedly connected to the first locking block (9), the drive gear (21) is connected to the worm gear structure, and the drive gear (21) meshes with the adjusting member (10); the second locking block (14) is set in the second mounting groove, the locking head (15) is connected to the connecting ring (6); the locking screw (13) is used to connect the second locking block (14) and the connecting ring (6).

2. The variable wide lens symmetry ring adjustment structure of claim 1, wherein: The spacing between adjacent connecting holes is 5°, and the spacing between the two ends of the first mounting groove (2) is 15°.

3. The variable wide-angle lens symmetry ring adjustment structure according to claim 1, wherein: The first locking block (9) is provided with an adjusting groove (16), and the bottom of the adjusting component (10) is fixedly connected to a sliding block (17). The sliding block (17) is slidably connected to the adjusting groove (16). The top of the adjusting rod (8) is fixedly connected to the slider, and the adjusting rod (8) is connected to the adjusting component (10) through the sliding block (17).

4. The variable wide-angle lens symmetry ring adjustment structure according to claim 3, wherein: There are two adjusting rods (8), which are symmetrically arranged on both sides of the sliding block (17). Both adjusting rods (8) are connected to the connecting hole.

5. The variable wide lens symmetry adjustment structure of claim 1, wherein: The worm gear structure includes a mounting box (12), a worm wheel (20), and a worm (19). The mounting box (12) is fixedly connected to the first locking block (9). The worm wheel (20) and the worm (19) are rotatably connected inside the mounting box (12). The worm wheel (20) meshes with the worm (19). The worm wheel (20) is fixedly connected to the drive gear (21) through a connecting shaft.

6. The variable wide-angle lens symmetry ring adjustment structure according to claim 5, wherein: One end of the worm (19) extends out of the mounting box (12) and is fixedly connected to a rotating head (18).

7. The variable wide-angle lens symmetry ring adjustment structure according to claim 6, wherein: The rotating head (18) is provided with a hexagonal hole.

8. The variable wide lens symmetry adjustment structure of claim 1, wherein: The bottom of the mounting box (12) is fixedly connected to a connecting post (11), which is fixedly connected to the first locking block (9). The mounting box (12) is connected to the first locking block (9) through the connecting post (11).

9. The variable wide-angle lens symmetry ring adjustment structure according to claim 1, wherein: The locking head (15) is bolted to the connecting ring (6).

Images