Manual focusing mechanism for double optical paths

Abstract

The utility model relates to a manual focusing mechanism for double optical paths, and belongs to the technical field of focusing of handheld equipment. Comprising a focusing frame, a first focusing mechanism and a second focusing mechanism. The focusing frame comprises a focusing fixing seat, a middle adapter plate and a focusing upper cover, the first focusing mechanism comprises a first focusing wheel, a first focusing lead screw, a first focusing nut, a focusing pull rod and a first connecting arm, and the second focusing mechanism comprises a second focusing wheel, a transmission shaft, a second focusing lead screw, a second focusing nut and a second connecting arm. The focusing mechanism can be independently assembled, then the focusing mechanism and the lens cone assembly are assembled, the focusing mechanism is convenient to disassemble, assemble and maintain, batch production can be carried out, the first focusing mechanism and the second focusing mechanism which are assembled achieve the independent manual focusing function of the double-optical-path lens, the relative position between the two lenses in the focusing process is stable, and the focusing effect is good. And the optical path of the other lens cone assembly is not interfered, so that the focusing clearness of each lens cone assembly is ensured, and the overall performance of the handheld equipment is improved.

Description

A manual focusing mechanism for dual optical paths Technical Field

[0001] This utility model relates to a manual focusing mechanism for dual optical paths, belonging to the field of focusing technology for handheld devices. Background Technology

[0002] For handheld devices, lens selection is mainly divided into focusing lenses and fixed-focus lenses. Focusing lenses are further divided into manual and electric types. The lenses of handheld devices have movable lens elements, and focusing can be adjusted by a motor or mechanical device such as a flange.

[0003] The advantage of motorized focusing lenses lies in their motor-driven operation, resulting in a high degree of automation and saving time and effort in the focusing process. However, the need for a motor leads to a more complex structure, requires more installation space, and increases the lens's weight. In contrast, manual focusing lenses have a simpler structure, require no motor, need less overall space, and are lighter than motorized focusing lenses.

[0004] Currently, there are two main designs for the focusing mechanism of manual focus lenses: one is a lens focusing ring, and the other is a separate focusing wheel. The lens focusing ring is far from the handheld part, requiring the hand to move back and forth during focusing, which affects the user experience. While a separate focusing wheel can be used depending on the specific product, the lens barrel assembly includes the lens barrel and the camera movement. The camera movement is mounted on a bracket that can move relative to the lens barrel. During focusing, rotating the focusing wheel causes the bracket containing the camera movement to move axially back and forth, thereby adjusting the distance between the camera movement and the lens inside the lens barrel, achieving the purpose of focusing or telephoto focusing. However, when dealing with handheld devices with dual optical paths, each optical path requires a focusing wheel. If the focusing wheels for the two lenses are set up independently, it involves more components, occupies more space, and affects the overall shape of the handheld device. Furthermore, having two independent focusing wheels makes left- and right-handed operation very inconvenient. If the two focusing wheels are placed together, there is a problem that focusing on one optical path may affect the other, potentially causing interference during the focusing process, resulting in unclear focusing and a poor user experience. In addition, existing focusing components also suffer from interdependence with the overall assembly of the handheld device, which is detrimental to mass production and manufacturing. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a manual focusing mechanism for dual optical paths.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A manual focusing mechanism for dual optical paths includes a focusing frame, a first focusing mechanism for focusing a first lens barrel assembly and a second focusing mechanism for focusing a second lens barrel assembly, which are mounted on the focusing frame; the focusing frame includes a focusing fixing base, a transfer plate and a focusing cover, and the transfer plate is mounted on the focusing fixing base.

[0007] The first focusing mechanism includes a first focusing wheel, a first focusing screw, a first focusing nut, a focusing pull rod, and a first connecting arm. The first focusing wheel is rotatably disposed between the focusing fixing seat and the intermediate transfer plate. The focusing fixing seat is provided with a focusing window. The first focusing screw can rotate with the first focusing wheel. The inner end of the focusing pull rod passes through the focusing fixing seat and is connected to the first focusing nut. The outer end of the focusing pull rod is connected to the first connecting arm for connecting the first movement of the first lens barrel assembly.

[0008] The second focusing mechanism includes a second focusing wheel, a drive shaft, a second focusing screw, a second focusing nut, and a second connecting arm. The second focusing wheel is rotatably disposed between the focusing cover and the intermediate transfer plate. The drive shaft is connected to the second focusing wheel and is rotatably disposed on the focusing cover, the intermediate transfer plate, and the focusing mounting base. The lower end of the drive shaft extends out of the focusing mounting base and is connected to the second focusing screw. The second focusing nut is connected to the second connecting arm of the second movement for connecting the second lens barrel assembly.

[0009] The beneficial effects of this utility model are as follows: The setting of the focusing frame of the manual focusing mechanism allows the mechanism to form an independent focusing component. After being independently assembled into a focusing mechanism assembly, the focusing mechanism is then assembled with the lens barrel assembly of the handheld device. The focusing mechanism can be independently disassembled and maintained, which is convenient and can be mass-produced. The independent manual focusing function of the dual-optical-path lens is realized through the first and second focusing mechanisms. The focusing mechanism has a compact structure, which is easy to install and maintain. At the same time, the independent design of the first and second focusing mechanisms also ensures the stability of the relative position between the two lenses during the focusing process, without interfering with the optical path of the other lens barrel assembly, thereby ensuring clear focusing of each lens barrel assembly and improving the overall performance of the handheld device.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the outer side of the first focusing screw is provided with a follower plane, and the inner wall of the first focusing wheel is provided with a planar structure adapted to the follower plane.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the cooperation between the follower plane and the planar structure ensures that the first focusing screw can rotate together with the first focusing wheel during the focusing process, thereby realizing the synchronous rotation of the first focusing screw and the first focusing wheel.

[0013] Furthermore, the focusing mounting base is provided with a positioning platform for positioning the lower part of the first focusing screw.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the positioning table can support and position the first focusing screw and limit its lower limit position, preventing the first focusing screw from moving around and ensuring the stability and reliability of the first focusing screw during the focusing process.

[0015] Furthermore, the intermediate transfer plate includes an intermediate transfer plate portion, a first positioning sleeve portion and a second positioning sleeve portion. One end face of the intermediate transfer plate portion is provided with a first annular cavity for the first focusing wheel to rotate, and the other end face of the intermediate transfer plate is provided with a second annular cavity for the second focusing wheel to rotate.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the intermediate plate, as a key component connecting the first focusing wheel and the second focusing wheel, realizes the rotational support of the first focusing wheel and the second focusing wheel. Its structure is compact, and the first annular cavity and the second annular cavity enable the first focusing wheel and the second focusing wheel to run smoothly on their respective annular tracks without interfering with each other, further improving the stability and reliability of the focusing process.

[0017] Furthermore, the inner end face of the focusing cover is provided with a cover ring groove for the second focusing wheel to rotate.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the cover ring groove provides a stable upper rotation environment for the second focusing wheel, and the second ring cavity on the intermediate transfer plate positions the lower end of the second focusing wheel, effectively preventing offset and shaking during the focusing process, ensuring that the second focusing wheel can rotate smoothly in the cover ring groove and the second ring cavity, making the entire manual focusing mechanism smoother in operation and the focusing effect more stable and reliable.

[0019] Furthermore, the focusing mounting base is provided with a seat ring cavity for the first focusing wheel to rotate.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the seat ring cavity provides a stable lower rotation environment for the first focusing wheel. Together with the first ring cavity on the transfer plate, it accurately positions the first focusing wheel, effectively avoids offset and shaking during the focusing process, ensures the smooth operation of the first focusing wheel on its ring track, and further improves the smoothness of the operation of the manual focusing mechanism.

[0021] Furthermore, the drive shaft is provided with a connecting protrusion, and the second focusing wheel has an annular platform inside. The connecting protrusion is connected to the annular platform by fasteners.

[0022] The beneficial effects of adopting the above-mentioned further solution are that the connection between the drive shaft and the second focusing wheel is more stable, ensuring the transmission stability during the focusing process. The fasteners tightly connect the connecting protrusion to the ring platform, effectively preventing loosening during the focusing process, ensuring the stability of the manual focusing mechanism, and improving the overall focusing reliability.

[0023] Furthermore, it also includes a locking nut, which is threadedly connected to the drive shaft; and / or includes an adjusting pin, which is disposed on the focusing cover, and the focusing cover has mounting holes for threaded connection of the adjusting pin.

[0024] The beneficial effect of adopting the above-mentioned further solution is that by adjusting the tightness of the pin or locking nut, the focusing feel can be controlled, the clamping degree of the drive shaft can be changed, and the tightness of the drive shaft can be controlled, thereby achieving the purpose of adjusting the tightness and ensuring the stability and reliability of the focusing mechanism.

[0025] Furthermore, the upper part of the focusing fixing base is provided with a plate positioning groove for positioning the intermediate transfer plate.

[0026] The beneficial effect of adopting the above-mentioned further solution is that the shape and size of the plate positioning groove match the intermediate transfer plate, so that the intermediate transfer plate can be accurately and stably installed on the focusing fixing seat, and is not easy to be displaced, which further improves the accuracy and reliability of manual focusing.

[0027] Furthermore, the upper part of the drive shaft is connected to the focusing cover via a first bearing, and the lower part of the drive shaft is connected to the focusing mounting base via a fourth bearing.

[0028] The beneficial effects of adopting the above-mentioned further solution are that the first bearing and the fourth bearing are respectively supported on the upper and lower parts of the drive shaft, which can support the drive shaft and enable it to rotate smoothly, reduce friction and wear, ensure the stability of the manual focusing mechanism during operation, and are easy to operate and maintain.

[0029] Furthermore, the upper part of the intermediate transfer plate is connected to the second focusing wheel via a second bearing, and the lower part of the intermediate transfer plate is connected to the first focusing screw via a third bearing.

[0030] The beneficial effect of adopting the above-mentioned further solution is that the second focusing wheel is connected to the second positioning sleeve of the intermediate transfer plate through the second bearing, and the first focusing screw is connected to the first positioning sleeve of the intermediate transfer plate through the third bearing, thereby realizing the rotational support of the second focusing wheel and the first focusing screw, making the focusing process smoother and ensuring the focusing stability of the manual focusing mechanism. Attached Figure Description

[0031] Figure 1 is a schematic diagram of the structure of this utility model;

[0032] Figure 2 is a schematic diagram of the structure of this utility model from below;

[0033] Figure 3 is a schematic diagram of the cross-sectional structure along the AA direction in Figure 2;

[0034] Figure 4 is a schematic diagram of the cross-sectional structure along the BB direction in Figure 2;

[0035] Figure 5 is a cross-sectional structural diagram of the intermediate transfer plate of this utility model;

[0036] Figure 6 is a schematic diagram of the split structure of this utility model;

[0037] Figure 7 is a three-dimensional structural schematic diagram of this utility model from a top view.

[0038] Figure 8 is a front view schematic diagram of the present invention assembled onto the lens barrel assembly;

[0039] Figure 9 is a three-dimensional structural diagram of the present invention assembled onto the lens barrel assembly;

[0040] In the diagram, 1. Focusing mounting base; 2. Transfer plate; 201. Transfer plate; 202. First positioning sleeve; 203. Second positioning sleeve; 204. First annular cavity; 205. Second annular cavity; 3. Focusing top cover; 4. First focusing wheel; 5. First focusing screw; 51. Follower plane; 6. First focusing nut; 7. Focusing pull rod; 8. First connecting arm; 9. Second focusing wheel; 10. Drive shaft; 101. Connecting protrusion; 11. Second focusing screw; 12. Second focusing nut; 13. Second connecting arm; 14. Locking nut; 15. Adjusting pin; 16. First bearing; 17. Second bearing; 18. Third bearing; 19. Fourth bearing; 20. Linear guide rail; 21. First bracket; 22. First lens barrel; 23. Second bracket; 24. Second lens barrel. Detailed Implementation

[0041] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0042] As shown in Figures 1-9, a manual focusing mechanism for dual optical paths includes a focusing frame, a first focusing mechanism for focusing a first lens barrel assembly, and a second focusing mechanism for focusing a second lens barrel assembly, all mounted on the focusing frame. The focusing frame includes a focusing mounting base 1, a transfer plate 2, and a focusing cover 3, with the transfer plate 2 located on top of the focusing mounting base 1.

[0043] The first focusing mechanism includes a first focusing wheel 4, a first focusing screw 5, a first focusing nut 6, a focusing pull rod 7, and a first connecting arm 8. The first focusing wheel 4 is rotatably disposed between the focusing fixing seat 1 and the intermediate transfer plate 2. A rotating cavity for accommodating the first focusing wheel 4 is provided between the focusing fixing seat 1 and the intermediate transfer plate 2. The focusing fixing seat 1 is provided with a focusing window. The first focusing screw 5 can rotate with the first focusing wheel 4. The inner end of the focusing pull rod 7 passes through the focusing fixing seat 1 and is connected to the first focusing nut 6. The outer end of the focusing pull rod 7 is connected to the first connecting arm 8 for connecting the first movement of the first lens barrel assembly. The first movement of the first lens barrel assembly is disposed on the first bracket 21.

[0044] The second focusing mechanism includes a second focusing wheel 9, a drive shaft 10, a second focusing screw 11, a second focusing nut 12, and a second connecting arm 13. The second focusing wheel 9 is rotatably disposed between the focusing cover 3 and the intermediate transfer plate 2. The drive shaft 10 is connected to the second focusing wheel 9 and is rotatably disposed on the focusing cover 3, the intermediate transfer plate 2, and the focusing mounting base 1. The lower end of the drive shaft 10 extends out of the focusing mounting base 1 and is connected to the second focusing screw 11. The second focusing nut 12 is connected to the second connecting arm 13, which is used to connect the second movement of the second lens barrel assembly. The second movement of the second lens barrel 24 is disposed on the second bracket 23.

[0045] The outer side of the first focusing screw 5 is provided with a follower plane 51, and the inner wall of the first focusing wheel 4 is provided with a planar structure adapted to the follower plane 51. The cooperation between the follower plane 51 and the planar structure ensures that the first focusing screw 5 can rotate together with the first focusing wheel 4 during the focusing process, so as to realize the synchronous rotation of the first focusing screw 5 and the first focusing wheel 4.

[0046] The focusing mounting base 1 is equipped with a positioning platform for positioning the lower part of the first focusing screw 5. The positioning platform can support and position the first focusing screw 5 and limit its lower limit position, preventing the first focusing screw 5 from moving around and ensuring the stability and reliability of the first focusing screw 5 during the focusing process.

[0047] The transfer plate 2 includes a transfer plate portion 201, a first positioning sleeve portion 202, and a second positioning sleeve portion 203. One end face of the transfer plate portion 201 has a first annular cavity 204 for the first focusing wheel 4 to rotate, and the other end face of the transfer plate 2 has a second annular cavity 205 for the second focusing wheel 9 to rotate. As a key component connecting the first focusing wheel 4 and the second focusing wheel 9, the transfer plate 2 provides rotational support for both. Its compact structure and the first and second annular cavities 204 and 205 allow the first and second focusing wheels 4 and 9 to run smoothly on their respective annular tracks without interfering with each other, further improving the stability and reliability of the focusing process. The first and second positioning sleeve portions 202 and 203 are used to install and fix relevant components of the first and second focusing mechanisms, ensuring stable rotation of the focusing wheels and adapting to various complex operating environments, providing durable and stable focusing support for handheld devices.

[0048] The inner end face of the focusing cover 3 is provided with a cover ring groove for the second focusing wheel 9 to rotate. The cover ring groove provides a stable upper rotation environment for the second focusing wheel 9. The second annular cavity 205 on the intermediate plate 2 positions the lower end of the second focusing wheel 9, effectively preventing offset and shaking during the focusing process, ensuring that the second focusing wheel 9 can rotate smoothly within the cover ring groove and the second annular cavity 205, making the entire manual focusing mechanism smoother in operation and the focusing effect more stable and reliable.

[0049] The focusing mounting base 1 is provided with a seat ring cavity for the first focusing wheel 4 to rotate. The seat ring cavity provides a stable lower rotation environment for the first focusing wheel 4, and works together with the first ring cavity 204 on the transfer plate 2 to accurately position the first focusing wheel 4, effectively avoiding offset and shaking during the focusing process, ensuring the smooth operation of the first focusing wheel 4 on its annular track, and further improving the smoothness of operation of the manual focusing mechanism.

[0050] The drive shaft 10 is provided with a connecting protrusion 101, and the second focusing wheel 9 has an annular platform inside. The connecting protrusion 101 is connected to the annular platform by fasteners. The connection between the drive shaft 10 and the second focusing wheel 9 is more stable, ensuring transmission stability during the focusing process. The fasteners tightly connect the connecting protrusion 101 to the annular platform, effectively preventing loosening during the focusing process, ensuring the stability of the manual focusing mechanism, and improving the overall focusing reliability.

[0051] It also includes a locking nut 14, which is threadedly connected to the drive shaft 10; and / or includes an adjusting pin 15, which is disposed on the focusing cover 3, and the focusing cover has mounting holes for threaded connection of the adjusting pin 15. The tightening or loosening of the adjusting pin 15 or the locking nut 14 adjusts the focusing feel, changes the clamping degree of the drive shaft 10, and controls the tightness of the drive shaft 10, thereby achieving the purpose of adjusting the tightness.

[0052] The upper part of the focusing mounting base 1 is provided with a plate positioning groove for positioning the intermediate transfer plate 2. The shape and size of the plate positioning groove match the intermediate transfer plate 2, so that the intermediate transfer plate 2 can be accurately and stably installed on the focusing mounting base 1, and is not easy to shift, further improving the accuracy and reliability of manual focusing.

[0053] The upper part of the drive shaft 10 is connected to the focusing cover 3 via a first bearing 16, and the lower part of the drive shaft 10 is connected to the focusing mounting base 1 via a fourth bearing 19. The first bearing 16 and the fourth bearing 19 support the upper and lower parts of the drive shaft 10 respectively, which can support the drive shaft 10 and enable it to rotate smoothly, reduce friction and wear, ensure the stability of the manual focusing mechanism during operation, and facilitate operation and maintenance.

[0054] The upper part of the intermediate transfer plate 2 is connected to the second focusing wheel 9 via the second bearing 17, and the lower part of the intermediate transfer plate 2 is connected to the first focusing screw 5 via the third bearing 18. The second focusing wheel 9 is connected to the second positioning sleeve 203 of the intermediate transfer plate 2 via the second bearing 17, and the first focusing screw 5 is connected to the first positioning sleeve 202 of the intermediate transfer plate 2 via the third bearing 18, thereby providing rotational support for the second focusing wheel 9 and the first focusing screw 5, making the focusing process smoother and ensuring the focusing stability of the manual focusing mechanism.

[0055] When in use, the manual focusing mechanism connects its first connecting arm 8 to the first support 21 of the first lens barrel assembly, where the first mechanism is located. A linear guide rail 20 can also be provided between the first support 21 and the first lens barrel 22 of the first lens barrel assembly. Using the linear guide rail 20 can reduce the resistance of the relative movement between the moving and fixed parts of the first lens barrel assembly. The second connecting arm 13 connects to the second support 23 of the second lens barrel assembly, where the second mechanism is located. A linear guide rail 20 can also be provided between the second support 23 and the second lens barrel 24 of the second lens barrel assembly. Using the linear guide rail 20 can reduce the resistance of the relative movement between the moving and fixed parts of the second lens barrel assembly.

[0056] The first focusing nut 6 and the focusing lever 7 are fixed together by screws to transmit force. The first focusing wheel 4 and the first focusing screw 5 can also be fixed together by screws. The fixed first focusing screw 5 is connected to the intermediate transfer plate 2 through the third bearing 18. The other end of the first focusing screw 5 cooperates with the positioning platform at the shaft hole of the focusing fixing seat 1, which can reduce the resistance of rotating the first focusing wheel 4 and improve the rotational accuracy of the focusing mechanism transmission, thus ensuring the stability of the image quality. Similarly, rotating the second focusing wheel 9 with a finger drives the transmission shaft 10 to rotate, which in turn causes the second focusing screw 11 to rotate, which in turn translates into the up and down movement of the second focusing nut 12. This movement is achieved through the up and down movement of the second connecting arm 13 and the second bracket 23, thereby enabling the second lens barrel assembly to focus. The two ends of the transmission shaft 10 are connected to the focusing cover 3 and the focusing fixing seat 1 through the first bearing 16 and the fourth bearing 19, respectively. The lower end of the second focusing wheel 9 is connected to the intermediate transfer plate 2 through the second bearing 17, ensuring the focusing feel and stability during operation.

[0057] During assembly of the manual focusing mechanism, the first focusing nut 6 is installed on the first focusing screw 5, and the first focusing nut 6 is fixed to the focusing pull rod 7 by screws. The first focusing screw is fixed to the first focusing wheel 4 by screws. After fixing, it is assembled into the focusing mounting base 1. Then, the third bearing 18 is installed into the first focusing screw 5, and the intermediate transfer plate 2 is installed into the focusing mounting base 1 and fixed with screws. The drive shaft 10 is fixed to the second focusing wheel 9 by fastening screws, and the first bearing 16 is installed into the drive shaft 10. The second bearing 17 is installed into the drive shaft 10. Install the intermediate transfer plate 2; install the drive shaft 10 onto the focusing mounting base 1, then assemble the fourth bearing 19 and the locking nut 14 in sequence, then fix the second focusing screw 11 to the drive shaft 10 with screws, and install the focusing nut onto the second focusing screw 11 through thread engagement. Finally, install the focusing cover 3 onto the first bearing 16, and screw the adjusting pin 15 into the focusing cover 3 for fixation. The manual focusing mechanism is now assembled. The above assembly can adjust the focusing feel by adjusting the tightness of the adjusting pin 15 or the locking nut 14. The focusing pull rod 7 is connected to the first connecting arm 8 by screws, which can transmit pulling or pushing force. The second focusing nut 12 is connected to the second connecting arm 13 by screws, which can also transmit pulling or pushing force. The manual focusing mechanism is assembled with the lens barrel assembly of the clamping device, as shown in Figures 8 and 9. The first connecting arm 8 is fixed to the first bracket 21 by screws. At the same time, the first bracket 21 is connected to one side of the linear guide rail 20, and the other side of the linear guide rail 20 is connected to the first lens barrel 22 by screws. The second connecting arm 13 is fixed to the second bracket 23 by screws. At the same time, the second bracket 23 is connected to one side of the linear guide rail 20, and the other side of the linear guide rail 20 is connected and fixed to the second lens barrel 24 by screws.

[0058] After the manual focusing mechanism is assembled with the lens barrel assembly, manually rotating the first focusing wheel 4 causes the first focusing screw 5 to rotate accordingly. Through the cooperation of the first focusing nut 6 and the first focusing screw 5, and the restriction of other components such as the focusing lever 7, the first focusing nut 6 moves linearly in the axial direction. The first focusing nut 6 drives the focusing lever 7 to move in the axial direction. The movement of the focusing lever 7 will drive the first connecting arm 8 to move. The first connecting arm 8 is connected to the first bracket 21 on which the first movement is installed, and can drive the first movement to move, adjusting the distance between the first movement and the first lens of the first lens barrel assembly. The second focusing wheel 9 serves to focus the first lens barrel assembly. Manually rotating the second focusing wheel 9 causes the drive shaft 10 to rotate. Through the cooperation of the second focusing nut 12 and the second focusing screw 11, and the constraints of other components such as the lens barrel assembly, the second focusing nut 12 moves linearly along the axial direction of the drive shaft 10. The second connecting arm 13 moves with the second focusing nut 12 and connects to the second bracket 23, which houses the second movement. This allows the second movement to be moved, adjusting the distance between the second movement and the second lens in the second lens barrel assembly, thus enabling the second lens barrel assembly to focus. In this design, the focusing of the first lens barrel 22 and the second lens barrel 24 can be completely independent without affecting the rotation of the other focusing wheel. Furthermore, they can be assembled and adjusted individually. After assembly and adjustment, the entire assembly can be fixed to the handheld device via the focusing mounting base 1, which is beneficial for stability and yield during assembly.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A manual focusing mechanism for dual-optical-path systems, comprising a focusing frame, a first focusing mechanism mounted on the focusing frame for focusing a first lens barrel assembly, and a second focusing mechanism for focusing a second lens barrel assembly; characterized in that, The focusing frame includes a focusing mounting base (1), a transfer plate (2), and a focusing cover (3). The transfer plate (2) is mounted on the focusing mounting base (1). The first focusing mechanism includes a first focusing wheel (4), a first focusing screw (5), a first focusing nut (6), a focusing pull rod (7), and a first connecting arm (8). The first focusing wheel (4) is rotatably mounted between the focusing mounting base (1) and the transfer plate (2). The focusing mounting base (1) is provided with a focusing window. The first focusing screw (5) can rotate with the first focusing wheel (4). The inner end of the focusing pull rod (7) passes through the focusing mounting base (1) and is connected to the first focusing nut (6). The outer end of the focusing pull rod (7) is connected to the first mechanism for connecting the first lens barrel assembly. The first connecting arm (8) of the core is connected; the second focusing mechanism includes a second focusing wheel (9), a drive shaft (10), a second focusing screw (11), a second focusing nut (12) and a second connecting arm (13). The second focusing wheel (9) is rotatably disposed between the focusing cover (3) and the intermediate transfer plate (2). The drive shaft (10) is connected to the second focusing wheel (9). The drive shaft (10) is rotatably disposed on the focusing cover (3), the intermediate transfer plate (2) and the focusing fixing seat (1). The lower end of the drive shaft (10) extends out of the focusing fixing seat (1) and is connected to the second focusing screw (11). The second focusing nut (12) is connected to the second connecting arm (13) of the second movement for connecting the second lens barrel assembly.

2. The manual focusing mechanism for dual optical paths according to claim 1, characterized in that, The outer side of the first focusing screw (5) is provided with a follower plane (51), and the inner wall of the first focusing wheel (4) is provided with a planar structure that is adapted to the follower plane (51).

3. The manual focusing mechanism for dual optical paths according to claim 2, characterized in that, The focusing mounting base (1) is provided with a positioning platform for positioning the lower part of the first focusing screw (5).

4. The manual focusing mechanism for dual optical paths according to claim 1, characterized in that, The transfer plate (2) includes a transfer plate part (201), a first positioning sleeve part (202) and a second positioning sleeve part (203). One end face of the transfer plate part (201) is provided with a first annular cavity (204) for the first focusing wheel (4) to rotate, and the other end face of the transfer plate (2) is provided with a second annular cavity (205) for the second focusing wheel (9) to rotate.

5. The manual focusing mechanism for dual optical paths according to any one of claims 1-4, characterized in that, The inner end face of the focusing cover (3) is provided with a cover ring groove for the second focusing wheel (9) to rotate; and / or the focusing fixing seat (1) is provided with a seat ring cavity for the first focusing wheel (4) to rotate.

6. The manual focusing mechanism for dual optical paths according to any one of claims 1-4, characterized in that, The drive shaft (10) is provided with a connecting protrusion (101), and the second focusing wheel (9) is provided with an annular platform inside. The connecting protrusion (101) is connected to the annular platform by fasteners.

7. The manual focusing mechanism for dual optical paths according to any one of claims 1-4, characterized in that, It also includes a locking nut (14) which is threaded to the drive shaft (10); and / or includes an adjusting pin (15) which is disposed on the focusing cover (3) and the focusing cover is provided with mounting holes for threaded connection of the adjusting pin (15).

8. The manual focusing mechanism for dual optical paths according to claim 1, characterized in that, The upper part of the focusing fixing seat (1) is provided with a plate positioning groove for positioning the intermediate transfer plate (2).

9. The manual focusing mechanism for dual optical paths according to any one of claims 1-4, characterized in that, The upper part of the drive shaft (10) is connected to the focusing cover (3) via the first bearing (16), and the lower part of the drive shaft (10) is connected to the focusing fixing seat (1) via the fourth bearing (19).

10. The manual focusing mechanism for dual optical paths according to any one of claims 1-4, characterized in that, The upper part of the intermediate transfer plate (2) is connected to the second focusing wheel (9) through the second bearing (17), and the lower part of the intermediate transfer plate (2) is connected to the first focusing screw (5) through the third bearing (18).

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