Mobile focusing optical lens group

By simplifying the structure and driving mechanism, using the coordination of the driving rack plate and threaded sleeve, the automatic focus of the optical lens group is realized, solving the problems of complex movement and large errors in the prior art, improving the focus accuracy and convenient use sex.

CN222213050UActive Publication Date: 2024-12-20SUZHOU XUANLIANG PHOTOELECTRIC TECH CO LTD
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Patent Information

Application Number
CN202420873764.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-25
Publication Date
2024-12-20
Estimated Expiration
2034-04-25

AI Technical Summary

Technical Problem

The existing optical lens groups with mobile focus have complex movement transformation and many structures during the focusing process, resulting in large accumulation of errors and affecting accuracy.

Method used

Using a simplified structural design, including the outer shell and the endoscope barrel, the endoscope barrel rotates through the meshing of the drive rack plate and the connecting gear, and the slow movement of the endoscope barrel is achieved by using threaded sleeves and external threads, combined with the drive motor Control the adjustment screw and slider for focus operation, reducing structural complexity and error.

Benefits of technology

The automatic focus function with simple structure, simple motion conversion and small error is realized, which improves the focus accuracy and facilitates the use and maintenance of the device through the design of side baffles and translucent lenses.

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Abstract

The utility model discloses a movable focusing optical lens group, relates to the optical lens group technology field, and comprises an outer shell and an inner lens cone installed in the outer shell, one end of the outer shell is provided with a through hole, one end of the inner lens cone extends to the outer part of the outer shell through the through hole, the inner part of the inner lens cone is fixedly connected with a lens group, and the lens group is fixedly connected with the inner part of the inner lens cone. A threaded sleeve is fixedly connected to the interior of the outer shell, an outer thread is arranged on the inner lens cone, the inner lens cone is in threaded connection to the interior of the threaded sleeve through the outer thread, and a connecting gear is fixedly connected to the inner lens cone. According to the automatic focusing device, the rack plate is driven to slide back and forth in the outer shell, the inner lens cone is made to rotate under the meshing action of the connecting gear, the inner lens cone slowly moves forwards or backwards in the rotating process under the action of the arranged threaded sleeve and external threads, automatic focusing is completed, and the automatic focusing device is simple in structure, convenient to operate and high in practicability. Motion conversion is simple, the number of structures is small, and errors are small.
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Description

Technical Field

[0001] The utility model relates to the technical field of optical lens groups, in particular to a mobile focusing optical lens group. Background Art

[0002] At present, lenses are used in various fields and occasions. For example, hospital examination equipment, optical equipment, scientific research instruments, etc., all of which require lenses for adjustment. In the process of guiding and penetrating light, focusing and other actions are required, which are achieved by adjusting the lens. Zooming and focusing functions are required through the movement of the lens to achieve imaging or path adjustment changes. Focusing is also called light alignment and focusing. The process of changing the distance and position of the object through the camera focus mechanism to make the image of the object clear is focusing.

[0003] Chinese Patent Publication No. CN219871921U A movable focusing optical lens assembly includes a shell, an inner shell is arranged inside the shell, a telescopic tube assembly is arranged at one end of the inner shell, and the telescopic tube assembly includes a rotating joint and a sliding joint, the rotating joint is slidably connected to the sliding joint, and a tooth groove is provided on the outside of the rotating joint, the rotating joint is rotatably connected to one side of the shell through a bearing, the inner wall of the sliding joint is fixedly connected to the inner shell, a threaded tube is arranged inside the sliding joint at one end of the shell, the inner wall of the sliding joint is threadedly connected to the outside of the threaded tube, a first connecting ring is fixedly connected to one end of the shell above the telescopic tube assembly, an arc rod is fixedly connected to the top of the first connecting ring, and a second connecting ring is fixedly connected to one end of the arc rod, and a nut is rotatably connected between the first connecting ring and the second connecting ring through a bearing.

[0004] However, the inventors of the above device believe that there are certain defects. The motion conversion of the above device during the focusing process is relatively complex, and there are many structures, which will lead to a large accumulation of errors and affect the focusing accuracy. For this reason, we provide a mobile focusing optical lens group to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and provide an optical lens group for mobile focusing, which has a simple structure, simple motion conversion, fewer structures and smaller errors.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mobile focusing optical lens group, comprising an outer shell and an inner barrel installed inside the outer shell, one end of the outer shell is provided with a through hole, one end of the inner barrel extends to the outside of the outer shell through the through hole, the interior of the inner barrel is fixedly connected with a lens group, the interior of the outer shell is fixedly connected with a threaded sleeve, the inner barrel is provided with an external thread, the inner barrel is threadedly connected to the interior of the threaded sleeve through the external thread, the inner barrel is fixedly connected with a connecting gear, the interior of the outer shell is slidably connected with a driving rack plate, the driving rack plate is meshed with the connecting gear, and the interior of the outer shell is provided with a driving mechanism for driving the driving rack plate to slide.

[0007] Furthermore, the driving mechanism includes an adjusting screw rotatably connected to the inside of the outer shell, and the bottom of the driving rack plate is fixedly connected to a connecting bottom block, and the connecting bottom block is threadedly connected to the adjusting screw. The driving rack plate is controlled to slide inside the outer shell by rotating the adjusting screw under the action of the connecting bottom block.

[0008] Furthermore, a fixed slide rod is fixedly connected to the interior of the outer shell, and the connecting bottom block is slidably connected to the fixed slide rod. A driving motor for driving the adjusting screw to rotate is fixedly connected to the interior of the outer shell. The adjusting screw is driven to rotate by starting the driving motor, so that the connecting bottom block slides on the fixed slide rod.

[0009] Furthermore, the lens group includes a first lens group, a second lens group and a third lens group, the first lens group, the second lens group and the third lens group are all fixedly connected inside the inner lens barrel, the first lens group, the second lens group and the third lens group are all optical lenses, and focusing operation is performed by setting the first lens group, the second lens group and the third lens group.

[0010] Furthermore, a mounting block is fixedly connected to the threaded sleeve, and the threaded sleeve is fixedly connected to the inside of the outer shell through the mounting block, and the threaded sleeve is supported and fixed by the provided mounting block.

[0011] Furthermore, a side baffle is installed at the other end of the outer shell, and a light-transmitting lens is inlaid on the side baffle. The other end of the outer shell is shielded by the side baffle, and light is transmitted by the light-transmitting lens.

[0012] Furthermore, bolts are installed on the side baffle, and the side baffle is detachably connected to the other end of the outer shell through the bolts. By removing the bolts on the side baffle, the side baffle can be easily removed from the other end of the outer shell.

[0013] Furthermore, an anti-collision strip is fixedly connected to the outer shell, and an anti-skid pad is fixedly connected to the bottom of the outer shell. The anti-skid pad facilitates stable prevention of the device, and the anti-collision strip plays an anti-collision role.

[0014] Compared with the prior art, the mobile focusing optical lens group has the following beneficial effects:

[0015] 1. The utility model drives the rack plate to slide back and forth inside the outer shell, and the inner lens barrel is rotated under the meshing action of the connecting gear. The inner lens barrel is moved forward or backward slowly during the rotation through the provided threaded sleeve and the external thread to complete the automatic focusing. The device has a simple structure, simple motion conversion, less structure, and small error.

[0016] 2. The utility model starts the driving motor to drive the adjusting screw to rotate, so as to control the connecting bottom block to slide back and forth on the fixed slide rod, shields one end of the outer shell through the side baffle plate, and transmits light through the light-transmitting lens, and opens one end of the outer shell by removing the bolts on the side baffle plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cutaway perspective view of the outer shell of the utility model;

[0018] Figure 2 This is a cutaway stereoscopic view of the inner lens barrel of the utility model;

[0019] Figure 3 This is a three-dimensional diagram of the inner lens barrel structure of the utility model;

[0020] Figure 4 For this utility model Figure 1 The enlarged schematic diagram at A in the middle;

[0021] Figure 5 It is a three-dimensional diagram of the utility model.

[0022] In the figure: 1, outer shell; 11, anti-collision strip; 12, anti-slip pad; 2, inner lens barrel; 21, external thread; 22, first lens group; 23, second lens group; 24, third lens group; 3, threaded sleeve; 31, mounting block; 4, connecting gear; 5, driving rack plate; 51, connecting bottom block; 6, adjusting screw; 61, fixed slide rod; 62, driving motor; 7, side baffle; 71, light-transmitting lens. DETAILED DESCRIPTION

[0023] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0024] As described in the background technology, the existing equipment has complex motion conversion during the focusing process and has many structures, which will lead to large error accumulation and affect the focusing accuracy. For this reason, this embodiment provides a mobile focusing optical lens group, which drives the rack plate to slide back and forth inside the outer shell, and rotates the inner barrel under the meshing action of the connecting gear. The inner barrel moves slowly forward or backward during the rotation through the action of the set threaded sleeve and the external thread to complete automatic focusing. The device has a simple structure, simple motion conversion and fewer structures, and small errors.

[0025] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This embodiment proposes an optical lens group for mobile focusing, including an outer shell 1 and an inner lens barrel 2 installed inside the outer shell 1, one end of the outer shell 1 is provided with a through hole, one end of the inner lens barrel 2 extends to the outside of the outer shell 1 through the through hole, and one end of the inner lens barrel 2 is extended to the outside of the outer shell 1 through the set through hole, and a lens group is fixedly connected inside, the lens group includes a first lens group 22, a second lens group 23 and a third lens group 24, the first lens group 22, the second lens group 23 and the third lens group 24 are all fixedly connected to the inside of the inner lens barrel 2, the first lens group 22, the second lens group 23 and the third lens group 24 are all optical lenses, and focusing operation is performed through the set first lens group 22, the second lens group 23 and the third lens group 24.

[0026] Please refer again Figure 1 , Figure 2 and Figure 5 A side baffle 7 is installed at the other end of the outer shell 1, and a transparent lens 71 is inlaid on the side baffle 7. Bolts are installed on the side baffle 7. The side baffle 7 is detachably connected to the other end of the outer shell 1 by bolts. The side baffle 7 is used to block one end of the outer shell 1, and the transparent lens 71 is used to transmit light. The bolts on the side baffle 7 are removed to remove the side baffle 7 from one end of the outer shell 1 to open one end of the outer shell 1. An anti-collision strip 11 is fixedly connected to the outer shell 1, and an anti-skid pad 12 is fixedly connected to the bottom of the outer shell 1. The anti-collision strip 11 has an anti-collision and anti-fall effect, and the stability of the outer shell 1 during placement or hand-holding is improved by the anti-skid pad 12.

[0027] Please refer again Figure 1 , Figure 2 and Figure 3The outer shell 1 is fixedly connected with a threaded sleeve 3, and a mounting block 31 is fixedly connected to the threaded sleeve 3. The threaded sleeve 3 is fixedly connected to the inner part of the outer shell 1 through the mounting block 31, and the threaded sleeve 3 is supported by the mounting block 31. The inner lens barrel 2 is provided with an external thread 21, and the inner lens barrel 2 is threadedly connected to the inner part of the threaded sleeve 3 through the external thread 21. When the inner lens barrel 2 rotates, the inner lens barrel 2 moves forward or backward under the action of the external thread 21 and the threaded sleeve 3. A connecting gear 4 is fixedly connected to the inner lens barrel 2. A driving rack plate 5 is slidably connected to the inner part of the outer shell 1, and the driving rack plate 5 is meshed with the connecting gear 4. The width value of the driving rack plate 5 is greater than the width value of the connecting gear 4. By controlling the driving rack plate 5 to slide in the inner part of the outer shell 1, the inner lens barrel 2 is driven to rotate under the meshing action of the driving rack plate 5 and the connecting gear 4, so that the inner lens barrel 2 rotates forward or backward.

[0028] Please refer again Figure 1 , Figure 2 , Figure 3 and Figure 4 A driving mechanism for driving the rack plate 5 to slide is provided inside the outer shell 1, and the driving mechanism includes an adjusting screw 6 rotatably connected to the inside of the outer shell 1, and a connecting bottom block 51 is fixedly connected to the bottom of the driving rack plate 5, and the connecting bottom block 51 is threadedly connected to the adjusting screw 6. A fixed slide rod 61 is fixedly connected to the inside of the outer shell 1, and the connecting bottom block 51 is slidably connected to the fixed slide rod 61. A driving motor 62 for driving the adjusting screw 6 to rotate is fixedly connected to the inside of the outer shell 1. The adjusting screw 6 is driven to rotate by starting the driving motor 62, and the driving rack plate 5 is driven to slide above the fixed slide rod 61 under the action of the connecting bottom block 51, and the connecting bottom block 51 is stably slidable by the fixed slide rod 61.

[0029] Working principle: when focusing is required, the driving motor 62 is controlled to drive the adjusting screw 6 to rotate, so that the driving rack plate 5 slides on the fixed slide rod 61, and the inner lens barrel 2 is driven to rotate under the action of the connecting gear 4. During the rotation of the inner lens barrel 2, the inner lens barrel 2 slowly moves forward or backward under the action of the set external thread 21 and the threaded sleeve 3. At the same time, the connecting gear 4 moves on the driving rack plate 5 and always keeps in meshing with the driving rack plate 5 to complete automatic focusing. The device has a simple structure, fewer motion conversion structures, and smaller errors. One end of the outer shell 1 is shielded by the set side baffle 7, and light is transmitted by the set light-transmitting lens 71. The side baffle 7 is removed from one end of the outer shell 1 by removing the bolts on the side baffle 7 to open one end of the outer shell 1.

Claims

1. A mobile focusing optical lens assembly, comprising an outer shell (1) and an inner lens barrel (2) installed inside the outer shell (1), characterized in that: A through hole is formed at one end of the outer shell (1), and one end of the inner lens barrel (2) extends to the outside of the outer shell (1) through the through hole. A lens group is fixedly connected to the interior of the inner lens barrel (2). A threaded sleeve (3) is fixedly connected to the interior of the outer shell (1). An external thread (21) is provided on the inner lens barrel (2). The inner lens barrel (2) is threadedly connected to the interior of the threaded sleeve (3) via the external thread (21). A connecting gear (4) is fixedly connected to the inner lens barrel (2). A driving rack plate (5) is slidably connected to the interior of the outer shell (1). The driving rack plate (5) is meshed with the connecting gear (4). A driving mechanism for driving the driving rack plate (5) to slide is provided inside the outer shell (1).

2. The mobile focusing optical lens assembly according to claim 1, characterized in that: The driving mechanism comprises an adjusting screw (6) rotatably connected to the inside of the outer shell (1); a connecting bottom block (51) is fixedly connected to the bottom of the driving rack plate (5); and the connecting bottom block (51) is threadedly connected to the adjusting screw (6).

3. The mobile focusing optical lens assembly according to claim 2, characterized in that: A fixed slide rod (61) is fixedly connected inside the outer shell (1), the connecting bottom block (51) is slidably connected to the fixed slide rod (61), and a driving motor (62) for driving the adjusting screw rod (6) to rotate is fixedly connected inside the outer shell (1).

4. The mobile focusing optical lens assembly according to claim 1, characterized in that: The lens group comprises a first lens group (22), a second lens group (23) and a third lens group (24); the first lens group (22), the second lens group (23) and the third lens group (24) are all fixedly connected inside the inner lens barrel (2); the first lens group (22), the second lens group (23) and the third lens group (24) are all optical lenses.

5. The mobile focusing optical lens assembly according to claim 1, characterized in that: A mounting block (31) is fixedly connected to the threaded sleeve (3), and the threaded sleeve (3) is fixedly connected to the interior of the outer shell (1) via the mounting block (31).

6. The mobile focusing optical lens assembly according to claim 1, characterized in that: A side baffle (7) is installed at the other end of the outer shell (1), and a light-transmitting lens (71) is inlaid on the side baffle (7).

7. The mobile focusing optical lens assembly according to claim 6, characterized in that: Bolts are installed on the side baffle (7), and the side baffle (7) is detachably connected to the other end of the outer shell (1) via the bolts.

8. The mobile focusing optical lens assembly according to claim 1, characterized in that: An anti-collision strip (11) is fixedly connected to the outer shell (1), and an anti-slip pad (12) is fixedly connected to the bottom of the outer shell (1).