Automatic centering device for camera lens glass

Abstract

The present invention relates to the technical field of camera lenses, and more specifically, to an automatic centering device for camera lens glass, comprising a base, a centering clamping assembly for automatically clamping the camera lens glass is provided on the base, and a flattening assembly for flattening the lens glass is provided above the centering clamping assembly; the centering clamping assembly comprises a rotating plate, a driving structure for driving the rotating plate to rotate, and a plurality of clamping rod structures regularly distributed in a ring shape on the rotating plate. The device can automatically center the lens glass when processing the lens glass by providing the centering clamping assembly; at the same time, by providing the flattening assembly, the convex lens can be flattened during the clamping process of the convex lens to keep it in a horizontal state, so as to avoid the convex lens being tilted and causing difficulty in centering during clamping; in addition, by providing a laser emitter, a colloid box, a through hole and a ring hole, it can be detected whether the centering is completed during the clamping process.

Description

Technical Field

[0001] The invention belongs to the technical field of camera lenses, and in particular relates to an automatic centering device for camera lens glass. Background Art

[0002] The glass lens of a camera is generally composed of a combination of plane glass, a concave lens and a convex lens. When processing the optical lens, it is usually necessary to center and clamp it before processing. For example, the authorization announcement number CN117140386A discloses a multi-degree-of-freedom self-centering optical lens clamping bracket in the field of optical detection equipment technology, including a telescopic rod arranged on a base, an outer ring fixedly connected to the top of the telescopic rod, a middle ring arranged on the inner side of the outer ring, and an inner ring arranged on the inner side of the middle ring. The telescopic rod is used to adjust the height and left and right rotation angle of the lens, the middle ring is flipped relative to the outer ring to adjust the pitch angle of the lens, and the inner ring with a self-centering clamping function is rotated relative to the middle ring to achieve self-centering and radial rotation angle adjustment of the lens.

[0003] At present, when automatically centering and clamping flat glass and concave lenses, the glass generally does not tilt. However, when automatically centering and clamping convex lenses, due to the convex characteristics of the middle part of the convex lens, it is generally difficult to place it horizontally, which will cause the glass to tilt during clamping and be difficult to automatically center. In order to solve the problem that the convex lens is easy to tilt and difficult to center when clamped, we propose an automatic centering device for camera lens glass.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide an automatic centering device for camera lens glass to solve the above-mentioned problems in the prior art.

[0006] To achieve the above-mentioned object, the present invention provides an automatic centering device for camera lens glass, comprising a base, a centering clamping assembly for automatically clamping the camera lens glass is provided on the base, and a flattening assembly for flattening the lens glass is provided above the centering clamping assembly;

[0007] The centering clamping assembly includes a rotating plate, a driving structure for driving the rotating plate to rotate, and a plurality of clamping rod structures that are regularly distributed in an annular shape on the rotating plate. The driving structure includes a motor arranged on the outer wall of the base, a rotating shaft coaxially fixed with the motor output shaft, and a first gear group and a second gear group respectively located at the inner end and the middle of the rotating shaft. The clamping rod structure includes a rod body, a clamping block located at the front end of the bottom surface of the rod body, and a support rod located at the rear end of the bottom surface of the rod body. The surface of the rotating plate is provided with a plurality of clamping grooves corresponding to the position size of the clamping blocks, and the clamping blocks and the clamping grooves can rotate relative to each other. A connecting rod that is transmission-connected to the first gear group is provided in the middle of the bottom surface of the rotating plate. A plurality of sliding grooves corresponding to the position of the clamping rod structure are provided on the upper surface of the base outside the rotating plate. The bottom end of the support rod is slidably connected to the sliding groove.

[0008] The flattening assembly includes a ring body and a pressure piece structure located below the ring body. The outer wall of the ring body is provided with two vertically arranged outriggers. The outer end of the outrigger rod on the right side is threadedly connected with a threaded rod, and the outer end of the outrigger rod on the rear side is slidably connected with a limiting rod. The bottom end of the threaded rod is transmission-connected to the second gear set. The pressure piece structure consists of an annular movable plate and a pressure block below the movable plate.

[0009] In the technical solution of the present invention, a top plate is provided above the flattening assembly, the upper and lower ends of the limiting rod are respectively fixed to the bottom surface of the top plate and the upper surface of the base, the upper end of the threaded rod is embedded in the bottom surface of the top plate and the two are rotatably connected.

[0010] In the technical solution of the present invention, a mounting cavity is provided in the base, the rotating shaft passes through the side wall of the mounting cavity and extends into the mounting cavity, and side baffles are provided on both sides of the slide groove on the top surface of the base.

[0011] In the technical solution of the present invention, the top end of the support rod is embedded in the rear end corresponding to the bottom surface of the rod body and the two can rotate relative to each other. The inner end of the rod body is in the shape of a circular plate and the diameter of the circle is greater than the width of the middle rod member of the rod body. A groove is provided on the arc surface of the inner end of the rod body, and a number of freely rotatable rubber balls are provided in the groove, and the rubber balls protrude from the groove.

[0012] In the technical solution of the present invention, the connecting rod is cylindrical and has a through hole in the middle. The outer wall of the bottom end of the connecting rod is provided with a flange. The flange is embedded in the bottom surface of the mounting cavity and the two are rotatably connected. A ring hole is provided in the middle of the rotating plate for the passage of the light beam. The top end of the connecting rod passes through the top surface of the mounting cavity and is coaxially fixed to the rotating plate. The diameter of the top end of the connecting rod is larger than the diameter of the ring hole, and the ring hole is connected to the through hole.

[0013] In the technical solution of the present invention, the first gear set and the second gear set are both composed of two mutually perpendicular bevel gears. The first gear set is composed of a bevel gear coaxially fixed with the upper end of the connecting rod and a bevel gear coaxially fixed with the inner end of the rotating shaft. The second gear set is composed of a bevel gear coaxially fixed with the bottom end of the threaded rod and a bevel gear coaxially fixed with the middle section of the rotating shaft.

[0014] In the technical solution of the present invention, an active cavity is provided inside the ring body, and insertion rods are symmetrically provided on the top surface of the active cavity, and a spring for buffering during automatic core positioning is provided outside the insertion rods.

[0015] In the technical solution of the present invention, the movable plate is arranged in the movable cavity, the size of the movable plate is adapted to the size of the movable cavity and the two are slidably connected, the insertion rod is inserted into the pressure piece structure, and the spring is arranged between the top surface of the movable cavity and the top surface of the movable plate.

[0016] In the technical solution of the present invention, the top of the pressing block passes through the movable cavity and is fixedly connected to the bottom surface of the movable plate. The vertical section of the pressing block is in the shape of a triangular ring, and a layer of soft pad is provided on the inner wall of the pressing block.

[0017] In the technical solution of the present invention, a laser emitter for emitting a light beam is provided in the through hole in the middle of the bottom surface of the installation cavity, and a colloid box for displaying the light path is provided at the center of the top plate.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. In the present invention, when the device is centering and clamping, the motor drives the rotating plate to rotate, and through the design of the clamping block and the clamping slot, it will synchronously drive a plurality of rods to rotate around the support rod, so that the clamping space formed between the rods is gradually reduced, and then the lens glass placed therein is automatically centered and clamped, thereby performing automatic centering and clamping.

[0020] 2. In the present invention, the device drives the ring body downward through a motor. When the pressing block contacts the convex lens, the pressing block is annular and horizontally arranged, which will slowly flatten the convex lens to keep it horizontal, thereby preventing the convex lens from tilting and making it difficult to center when clamping.

[0021] 3. In the present invention, the device is provided with a laser emitter, a colloid box, a through hole and a ring hole, so that the emitted laser can pass through the clamped lens glass, and then according to the Tyndall phenomenon in the colloid box, it can be judged whether the centering is completed during the clamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the centering clamping assembly of the present invention;

[0024] Figure 3 An exploded view of the core fixing and clamping assembly of the present invention;

[0025] Figure 4 It is a cross-sectional view of the clamping rod structure in the present invention;

[0026] Figure 5 It is a schematic diagram of the driving structure in the present invention;

[0027] Figure 6 It is a cross-sectional view of the base in the present invention;

[0028] Figure 7 It is a cross-sectional view of the connecting rod in the present invention;

[0029] Figure 8 It is an exploded view of the flattening component in the present invention;

[0030] Fig. 9 It is an enlarged view of the structure at A in the present invention;

[0031] Fig.10 It is a cross-sectional view of the pressure piece structure in the present invention.

[0032] Description of reference numerals:

[0033] 1. Base; 11. Installation cavity; 12. Slide groove; 13. Side baffle;

[0034] 2. Centering clamping assembly; 21. Driving structure; 211. Motor; 212. Rotating shaft; 213. First gear set; 214. Second gear set; 22. Rotating plate; 221. Card slot; 23. Clamping rod structure; 231. Rod body; 232. Card block; 233. Support rod; 234. Rubber ball; 24. Connecting rod; 241. Through hole;

[0035] 3. Flattening assembly; 31. Ring body; 311. Active cavity; 312. Insert rod; 313. Spring; 32. Pressing piece structure; 321. Active plate; 322. Pressing block; 33. Extending rod; 34. Threaded rod; 35. Limiting rod;

[0036] 4. Top plate; 41. Colloid box;

[0037] 5. Laser transmitter. DETAILED DESCRIPTION

[0038] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0039] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0040] Reference Figure 1-Figure 10 As shown, an automatic centering device for a camera lens glass of the present invention comprises a base 1, a centering clamping assembly 2 for automatically clamping the camera lens glass is provided on the base 1, a flattening assembly 3 for flattening the lens glass is provided above the centering clamping assembly 2, the lens glass is automatically center-clamped by setting the centering clamping assembly 2, when the convex lens is clamped, the flattening assembly 3 can help the convex lens to remain horizontal, and avoid the convex lens from tilting during the clamping process, resulting in center deviation, which affects subsequent processing;

[0041] The centering clamping assembly 2 includes a rotating plate 22, a driving structure 21 for driving the rotating plate 22 to rotate, and a plurality of clamping rod structures 23 regularly distributed in a ring shape on the rotating plate 22. The driving structure 21 includes a motor 211 arranged on the outer wall of the base 1, a rotating shaft 212 coaxially fixed with the output shaft of the motor 211, and a first gear set 213 and a second gear set 214 respectively located at the inner end and the middle of the rotating shaft 212. The clamping rod structure 23 includes a rod body 231, a bottom surface of the rod body 231 near the front end, and a The block 232 and the support rod 233 located at the rear end of the bottom surface of the rod body 231, the surface of the rotating plate 22 is provided with a plurality of slots 221 corresponding to the position and size of the block 232, the block 232 and the slot 221 can rotate relative to each other, the middle part of the bottom surface of the rotating plate 22 is provided with a connecting rod 24 connected to the first gear set 213 in a transmission manner, the upper surface of the base 1 is provided with a plurality of slide grooves 12 corresponding to the position of the clamping rod structure 23 in a range outside the rotating plate 22, and the bottom end of the support rod 233 is slidably connected to the slide groove 12;

[0042] When the glass lens is automatically centered and clamped, the motor 211 drives the connecting rod 24 to rotate through the rotating shaft 212 and the first gear set 213, thereby driving the rotating plate 22 to rotate. The rotating rotating plate 22, through the design of the clamping block 232 and the clamping slot 221, will synchronously drive the rod body 231 to rotate around the supporting rod 233. Since the rod body 231 synchronously rotates around the supporting rod 233, the clamping space formed between the plurality of rod bodies 231 is gradually reduced, thereby automatically centering and clamping the lens glass placed therein;

[0043] The flattening assembly 3 includes a ring body 31 and a pressing piece structure 32 located below the ring body 31. The outer wall of the ring body 31 is provided with two vertically arranged outriggers 33. The outer end of the right outrigger 33 is threadedly connected to a threaded rod 34. The outer end of the rear outrigger 33 is slidably connected to a limiting rod 35. The bottom end of the threaded rod 34 is transmission-connected to the second gear set 214. The pressing piece structure 32 is composed of an annular movable plate 321 and a pressing block 322 below the movable plate 321. When the convex lens is automatically centered and clamped, the motor 211 will synchronously drive the ring body 31 downward through the second gear set 214 and the threaded rod 34. When the pressing block 322 contacts the convex lens, since the pressing block 322 is annular and horizontally arranged, the convex lens will be slowly flattened to keep it horizontal to avoid tilting and making it difficult to center.

[0044] Among them, Figure 1-Figure 2 As shown, a top plate 4 is provided above the flattening assembly 3, the upper and lower ends of the limiting rod 35 are respectively fixed to the bottom surface of the top plate 4 and the upper surface of the base 1, the upper end of the threaded rod 34 is embedded in the bottom surface of the top plate 4 and the two are rotatably connected, and the limiting rod 35 and the threaded rod 34 are supported by setting the top plate 4.

[0045] In addition, if Figure 6 As shown, a mounting cavity 11 is provided in the base 1, and the rotating shaft 212 extends into the mounting cavity 11 through the side wall of the mounting cavity 11. Side baffles 13 are provided on both sides of the slide groove 12 on the top surface of the base 1, and the support rod 233 is limited and blocked by setting the side baffles 13.

[0046] In addition, if Figure 3-Figure 4 As shown, the top end of the support rod 233 is embedded in the bottom surface of the corresponding rod body 231 near the rear end, and the two can rotate with each other, ensuring that the rod body 231 can drive the support rod 233 to slide in the slide groove 12, and the rotation of the rod body 231 will not affect the support rod 233. The inner end of the rod body 231 is a circular plate, and the diameter of the circle is greater than the width of the rod member in the middle of the rod body 231. When the rotating plate 22 drives the rod body 231 to rotate through the clamping block 232 and the clamping groove 221, the circular plate-shaped inner end of the rod body 231 can ensure that a plurality of rod bodies 231 can contact and clamp the glass at any angle of rotation;

[0047] Specifically, a groove is formed on the arc surface at the inner end of the rod body 231, and a number of freely rotatable rubber balls 234 are arranged in the groove. The rubber balls 234 protrude out of the groove. The rubber balls 234 can ensure that when the lens glass is automatically centered and clamped, there is a buffer between the arc surface at the inner end of the rod body 231 and the edge of the glass, thereby avoiding damage to the glass edge caused by excessive clamping force. At the same time, the rubber balls 234 have a larger friction coefficient and are easier to fix the lens glass.

[0048] In addition, if Figure 6-Figure 7As shown, the connecting rod 24 is cylindrical and has a through hole 241 in the middle. The outer wall of the bottom end of the connecting rod 24 is provided with a flange, which is embedded in the bottom surface of the installation cavity 11 and the two are rotatably connected. The flange can ensure that the installation cavity 11 supports the connecting rod 24 without affecting the rotation of the connecting rod 24. A ring hole is provided in the middle of the rotating plate 22 for the passage of the light beam. The top end of the connecting rod 24 passes through the top surface of the installation cavity 11 and is coaxially fixed to the rotating plate 22. The top diameter of the connecting rod 24 is larger than the diameter of the ring hole, which facilitates the coaxial connection between the connecting rod 24 and the rotating plate 22 and avoids blocking the ring hole. The ring hole is connected to the through hole 241, and the ring hole and the through hole 241 can ensure that the laser emitted by the laser emitter 5 below can pass upward and pass through the lens glass.

[0049] Specifically, the first gear set 213 and the second gear set 214 are both composed of two mutually perpendicular bevel gears. The first gear set 213 is composed of a bevel gear coaxially fixed to the upper end of the connecting rod 24 and a bevel gear coaxially fixed to the inner end of the rotating shaft 212. During automatic centering clamping, the motor 211 can drive the connecting rod 24 to rotate through the first gear set 213; the second gear set 214 is composed of a bevel gear coaxially fixed to the bottom end of the threaded rod 34 and a bevel gear coaxially fixed to the middle section of the rotating shaft 212. While clamping, the motor 211 can drive the upper flattening assembly 3 to press down through the second gear set 214 to prevent the lens glass from tilting.

[0050] In addition, if Figure 8-Figure 10 As shown, a movable cavity 311 is provided in the ring body 31, and a plug rod 312 is symmetrically provided on the top surface of the movable cavity 311 in the front and rear, and a spring 313 for buffering during automatic centering is provided on the outer sleeve of the plug rod 312, and a movable plate 321 is provided in the movable cavity 311, and the size of the movable plate 321 is adapted to the size of the movable cavity 311 and the two are slidably connected, and the plug rod 312 is plugged into the pressing piece structure 32, and the spring 313 is provided between the top surface of the movable cavity 311 and the top surface of the movable plate 321. When the flattening assembly 3 is pressed down to contact with the lens glass, the lens glass will press the pressing piece structure 32 upward and compress the spring 313, so that there is a buffer between the lens glass and the pressing piece structure 32, thereby preventing the flattening assembly 3 from causing damage to the lens glass;

[0051] Furthermore, the top of the pressing block 322 passes through the movable cavity 311 and is fixedly connected to the bottom surface of the movable plate 321. The vertical cross-section of the pressing block 322 is in the shape of a triangular ring, so that the inner wall of the pressing block 322 can better fit the surface of the convex lens, while avoiding the situation where the right-angle edge directly presses down the lens glass to cause marks on the glass surface. The inner wall of the pressing block 322 is provided with a layer of cushion, and the lens glass and the pressing block 322 are further buffered by providing the cushion.

[0052] In addition, if Figure 1 and Figure 7As shown, a laser emitter 5 for emitting a light beam is provided in a through hole 241 in the middle of the bottom surface of the installation cavity 11, and a colloid box 41 for displaying the light path is provided in the center of the top plate 4. During the automatic centering process, the laser emitter 5 will emit a red laser and pass through the lens glass upward. When the centering is successful, the laser will pass through the center of the glass with basically no refraction. At this time, according to the Tyndall phenomenon, the laser will leave a bright and clear light beam in the colloid box 41. When the centering is not completed, since the laser does not pass through the center of the glass and the refraction angle is large, the laser cannot pass through the colloid box 41, or only part of the light can pass through but the light beam is obviously not bright enough and has a large diffusion range, so as to check whether the automatic centering is completed.

[0053] The working principle of the automatic centering device for camera lens glass of the present invention is specifically as follows:

[0054] First, the lens glass is horizontally placed at the center of the rotating plate 22, and then the motor 211 is started. The motor 211 drives the connecting rod 24 to rotate through the rotating shaft 212 and the first gear set 213, and then drives the rotating plate 22 to rotate. The rotating rotating plate 22 will synchronously drive the plurality of rod bodies 231 to rotate around the supporting rod 233 through the design of the clamping block 232 and the clamping slot 221. Since the rod bodies 231 rotate synchronously around the supporting rod 233, the clamping space formed between the plurality of rod bodies 231 is gradually reduced, and then the lens glass placed therein is automatically centered and clamped;

[0055] While clamping, the motor 211 will synchronously drive the ring body 31 to move downward through the second gear set 214 and the threaded rod 34. When the pressing block 322 contacts the convex lens, the pressing block 322 is annular and horizontally arranged, which will slowly flatten the convex lens to keep it horizontal and avoid tilting, which makes it difficult to center.

[0056] In addition, after placing the lens glass, start the laser emitter 5. When centering is successful, the laser will pass through the center of the glass with basically no refraction. At this time, according to the Tyndall phenomenon, the laser will leave a bright and clear light beam in the colloid box 41. When centering is not completed, since the laser does not pass through the center of the glass and the refraction angle is large, the laser cannot pass through the colloid box 41, or only part of the light can pass through but the light beam is obviously not bright enough and has a large diffusion range. This can be used to check whether automatic centering is completed.

[0057] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. An automatic centering device for camera lens glass, comprising a base (1), characterized in that: The base (1) is provided with a centering clamping assembly (2) for automatically clamping the camera lens glass, and a flattening assembly (3) for flattening the lens glass is provided above the centering clamping assembly (2); The centering clamping assembly (2) comprises a rotating plate (22), a driving structure (21) for driving the rotating plate (22) to rotate, and a plurality of clamping rod structures (23) located on the rotating plate (22) and regularly distributed in an annular shape, wherein the driving structure (21) comprises a motor (211) arranged on the outer wall of the base (1), a rotating shaft (212) coaxially fixed with the output shaft of the motor (211), and a first gear set (213) and a second gear set (214) respectively located at the inner end and the middle of the rotating shaft (212), and the clamping rod structure (23) comprises a rod body (231), and a clamping block (232) located on the bottom surface of the rod body (231) near the front end. and a support rod (233) located at the rear end of the bottom surface of the rod body (231); a plurality of slots (221) corresponding to the position and size of the block (232) are provided on the surface of the rotating plate (22); the block (232) and the slots (221) can rotate relative to each other; a connecting rod (24) connected to the first gear set (213) in a transmission manner is provided in the middle of the bottom surface of the rotating plate (22); a plurality of slide grooves (12) corresponding to the position of the clamping rod structure (23) are provided on the upper surface of the base (1) in a range outside the rotating plate (22); and the bottom end of the support rod (233) is slidably connected to the slide groove (12); The flattening assembly (3) comprises a ring body (31) and a pressure piece structure (32) located below the ring body (31); the outer wall of the ring body (31) is provided with two vertically arranged extension rods (33); the outer end of the right extension rod (33) is threadedly connected to a threaded rod (34); the outer end of the rear extension rod (33) is slidably connected to a limit rod (35); the bottom end of the threaded rod (34) is transmission-connected to the second gear set (214); the pressure piece structure (32) consists of an annular movable plate (321) and a pressure block (322) below the movable plate (321).

2. The automatic centering device for camera lens glass as claimed in claim 1, characterized in that: A top plate (4) is provided above the flattening assembly (3); the upper and lower ends of the limiting rod (35) are respectively fixed to the bottom surface of the top plate (4) and the upper surface of the base (1); the upper end of the threaded rod (34) is embedded in the bottom surface of the top plate (4) and the two are rotatably connected.

3. The automatic centering device for camera lens glass as claimed in claim 2, characterized in that: The base (1) is provided with a mounting cavity (11), the rotating shaft (212) passes through the side wall of the mounting cavity (11) and extends into the mounting cavity (11), and the top surface of the base (1) is provided with side baffles (13) on both sides of the slide groove (12).

4. The automatic centering device for camera lens glass as claimed in claim 1, characterized in that: The top end of the support rod (233) is embedded in the bottom surface of the rod body (231) and the two can rotate relative to each other. The inner end of the rod body (231) is in the shape of a circular plate and the diameter of the circle is larger than the width of the middle rod member of the rod body (231). A groove is formed on the arc surface of the inner end of the rod body (231). A plurality of freely rotatable rubber balls (234) are arranged in the groove, and the rubber balls (234) protrude from the groove.

5. The automatic centering device for camera lens glass as claimed in claim 3, characterized in that: The connecting rod (24) is cylindrical and has a through hole (241) in the middle. The outer wall of the bottom end of the connecting rod (24) is provided with a flange, and the flange is embedded in the bottom surface of the installation cavity (11) and the two are rotatably connected. The middle of the rotating plate (22) is provided with a ring hole for the passage of the light beam. The top end of the connecting rod (24) passes through the top surface of the installation cavity (11) and is coaxially fixed to the rotating plate (22). The diameter of the top end of the connecting rod (24) is larger than the diameter of the ring hole, and the ring hole is connected to the through hole (241).

6. The automatic centering device for camera lens glass as claimed in claim 1, characterized in that: The first gear set (213) and the second gear set (214) are both composed of two mutually perpendicular bevel gears. The first gear set (213) is composed of a bevel gear coaxially fixed to the upper end of the connecting rod (24) and a bevel gear coaxially fixed to the inner end of the rotating shaft (212). The second gear set (214) is composed of a bevel gear coaxially fixed to the bottom end of the threaded rod (34) and a bevel gear coaxially fixed to the middle section of the rotating shaft (212).

7. The automatic centering device for camera lens glass as claimed in claim 1, characterized in that: An active cavity (311) is provided in the ring body (31), and an insertion rod (312) is symmetrically provided on the top surface of the active cavity (311) in the front and rear directions. A spring (313) for buffering during automatic centering is provided on the outer sleeve of the insertion rod (312).

8. The automatic centering device for camera lens glass as claimed in claim 7, characterized in that: The movable plate (321) is arranged in the movable cavity (311); the size of the movable plate (321) is adapted to the size of the movable cavity (311) and the two are slidably connected; the insertion rod (312) is inserted into the pressure piece structure (32); and the spring (313) is arranged between the top surface of the movable cavity (311) and the top surface of the movable plate (321).

9. The automatic centering device for camera lens glass as claimed in claim 8, characterized in that: The top of the pressing block (322) passes through the movable cavity (311) and is fixedly connected to the bottom surface of the movable plate (321); the vertical cross section of the pressing block (322) is in the shape of a triangular ring, and a layer of soft pad is provided on the inner wall of the pressing block (322).

10. The automatic centering device for camera lens glass as claimed in claim 5, characterized in that: A laser emitter (5) for emitting a light beam is provided in the through hole (241) in the middle of the bottom surface of the installation cavity (11), and a colloid box (41) for displaying a light path is provided at the center of the top plate (4).

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