Optical lens focusing device
The photosensitive element and transmission element are meshed and connected with the gear and the tooth ring to achieve automatic focus of the optical lens, which solves the problem of low manual focus accuracy in the prior art, and improves the focus accuracy and convenience of use.
Patent Information
- Application Number
- CN202422388362.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-29
AI Technical Summary
The existing optical lens focusing device requires manual rotation of the focus cylinder, which is difficult to control the focus accuracy and cannot be automatically focused.
The photosensitive element and transmission element are used to mesh the gear and the tooth ring meshing connection, and the translation distance of the moving shell of the rotation axis by one circle is reduced through the tooth ratio to achieve automatic focus, and the focus process is detected through a microcontroller, photosensitive chip and laser sensor. The gear ratio and threaded connection between the gear and the tooth ring and the stud are used to improve the focus accuracy.
It realizes automatic focus of the optical lens, which is easy to use, significantly improves the focus accuracy, and avoids errors caused by manual operation.
Smart Images
Figure CN223139934U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical lenses, and specifically relates to an optical lens focusing device. Background Art
[0002] Optical lens focusing is to find the best clear point of imaging by adjusting the distance between the lens and the image sensor, so that the photo or video is clearer and of better quality. Some optical lens focusing devices include: a fixedly arranged fixed lens barrel; a focusing barrel, which is sleeved outside the fixed lens barrel, the focusing barrel is rotatably arranged on the fixed lens barrel along its own axis direction, and a spiral groove is opened on the inner side of the focusing barrel; at least one moving frame is embedded in the focusing barrel; an installation groove for installing a lens is opened on the moving frame, and the moving frame is slidably arranged in the fixed lens barrel along the axis direction of the fixed lens barrel; a connecting block is also arranged on the moving frame; a connecting groove for the connecting block to pass through is also opened on the fixed lens barrel, and one end of the connecting block away from the moving frame passes through the connecting groove and abuts against the inner wall of the spiral groove; when the focusing barrel rotates along its own axis direction, the connecting block moves along the extending direction of the connecting groove to drive the moving frame to slide along the axis direction of the fixed lens barrel. The utility model improves the focusing accuracy of the focusing device. However, when the device focuses the optical lens, it is required that the staff's eyes are located at the imaging part of the optical lens, and then the focusing barrel is manually rotated to perform the focusing operation. The device cannot automatically focus the optical lens and needs to be improved. At the same time, when the focusing barrel is manually rotated, the focusing barrel moves along the fixed lens barrel by being threadedly connected with the spiral groove. When the focusing barrel rotates one circle, the thread lead of the focusing barrel along the spiral groove is relatively large, which is not conducive to the device to control the focusing accuracy of the optical lens. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide an optical lens focusing device. The device can automatically perform the focusing operation on the optical lens through a photosensitive element and a transmission element, which is convenient to use. At the same time, the device is meshed and connected through a gear and a toothed ring, and the translation distance of the moving shell when the rotating shaft rotates one circle is reduced by using the tooth number ratio between the two, so as to improve the focusing accuracy of the device for the optical lens, and the problems in the background art can be effectively solved.
[0004] To achieve the above object, the utility model provides the following technical solution: an optical lens focusing device, including a lens barrel housing and a high-precision focusing mechanism;
[0005] Lens barrel housing: symmetrically distributed sliding grooves are opened on its inner wall, a moving shell is slidably connected between the sliding grooves, a fixed seat is arranged at the right end of the lens barrel housing, a plane glass is arranged in the middle of the fixed seat, and a photosensitive chip is arranged on the left side of the plane glass;
[0006] High-precision focusing mechanism: It includes a stud, a first gear, a rotating ring, an external gear ring, a fixing bracket, a second gear, and an internal gear ring. The stud is rotatably connected to the upper chute through a first bearing. The stud is threadedly connected to the moving shell. A first gear is provided at the right end of the stud. The left side of the fixing seat is rotatably connected to a rotating ring through a second bearing. An external gear ring is provided on the outer side of the rotating ring, and an internal gear ring is provided on the inner wall of the rotating ring. The external gear ring is meshed with the first gear. A fixing bracket is provided on the left side of the fixing seat. The middle of the fixing bracket is rotatably connected to a second gear through a rotating shaft. The second gear is meshed with the internal gear ring. This device can automatically focus the optical lens through photosensitive elements and transmission elements, which is convenient to use. At the same time, the device is connected by meshing of gears and gear rings, and the translation distance of the moving shell when the rotating shaft rotates one circle is reduced by using the tooth number ratio between the two, thereby improving the focusing accuracy of the device for the optical lens.
[0007] Further, a single-chip microcomputer is provided on the outer side of the lens barrel shell. The input end of the single-chip microcomputer is electrically connected to an external power supply, and the photosensitive chip is bidirectionally electrically connected to the single-chip microcomputer, which is convenient for controlling electrical components.
[0008] Further, a first lens is provided at the left end of the moving shell, and a second lens is provided inside the lens barrel shell. The focusing of the optical lens is achieved through the horizontal distance between the first lens and the second lens.
[0009] Further, uniformly distributed anti-slip lines are provided on the right end of the outer side of the lens barrel shell to avoid relative sliding between the contact parts of the staff's hands and the device.
[0010] Further, the high-precision focusing mechanism further includes a braking motor. The braking motor is provided on the left side of the fixing bracket. The input end of the braking motor is electrically connected to the output end of the single-chip microcomputer, and the output shaft of the braking motor is fixedly connected to the left end of the rotating shaft, providing power for the automatic focusing of the device on the optical lens.
[0011] Further, the high-precision focusing mechanism further includes a guide rod. The guide rod is provided in the lower chute. The moving shell is slidably connected to the guide rod through a round hole, improving the translational stability of the moving shell in the optical lens focusing device.
[0012] Further, a laser sensor is provided on the right side of the moving shell. The laser sensor is bidirectionally electrically connected to the single-chip microcomputer, detecting and uploading the moving distance of the first lens during the automatic focusing of the optical lens, facilitating its later automatic reset.
[0013] Compared with the prior art, the beneficial effects of the present utility model are: This optical lens focusing device has the following advantages:
[0014] When focusing the optical lens, through the single-chip microcomputer, the photosensitive chip and the high-precision focusing mechanism, the optical lens is automatically focused, which is convenient to use. At the same time, the device uses a stud, a first gear, a rotating ring, an external gear ring, a fixed bracket, a second gear and an internal gear ring, and utilizes the tooth number ratio of the gear and the gear ring to reduce the translation distance of the moving shell when the rotating shaft rotates one circle, thereby improving the focusing accuracy of the device for the optical lens. Brief Description of the Drawings
[0015] Figure 1 It is a schematic structural diagram of the present utility model;
[0016] Figure 2 It is a schematic cross-sectional structural diagram of the present utility model;
[0017] Figure 3 It is a schematic enlarged structural diagram at position A of the present utility model.
[0018] In the figure: 1 lens barrel housing, 2 moving housing, 3 first lens, 4 second lens, 5 anti-slip pattern, 6 high-precision focusing mechanism, 61 stud, 62 first gear, 63 rotating ring, 64 external gear ring, 65 fixed bracket, 66 second gear, 67 internal gear ring, 68 braking motor, 69 guide rod, 7 fixed seat, 8 plane glass, 9 single-chip microcomputer, 10 laser sensor, 11 photosensitive chip. Specific Embodiments
[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0020] Please refer to Figures 1-3 , this embodiment provides a technical solution: an optical lens focusing device, including a lens barrel housing 1 and a high-precision focusing mechanism 6;
[0021] Lens barrel housing 1: Symmetrically distributed sliding grooves are provided on its inner wall. A moving housing 2 is slidably connected between the sliding grooves. A fixed seat 7 is provided at the right end of the lens barrel housing 1. A plane glass 8 is provided in the middle of the fixed seat 7. A photosensitive chip 11 is provided on the left side of the plane glass 8. A single-chip microcomputer 9 is provided on the outside of the lens barrel housing 1. The input end of the single-chip microcomputer 9 is electrically connected to an external power supply. The photosensitive chip 11 is bidirectionally electrically connected to the single-chip microcomputer 9. A first lens 3 is provided at the left end of the moving housing 2. A second lens 4 is provided inside the lens barrel housing 1. Uniformly distributed anti-slip lines 5 are provided on the outside right end of the lens barrel housing 1. A laser sensor 10 is provided on the right side of the moving housing 2. The laser sensor 10 is bidirectionally electrically connected to the single-chip microcomputer 9. By means of the anti-slip lines 5, the contact friction is increased to avoid the relative sliding phenomenon at the contact part between the staff's hand and the device. During the automatic focusing process of the optical lens, the single-chip microcomputer 9 activates the laser sensor 10. The laser sensor 10 emits an optical signal and irradiates the left side of the external gear ring 64 and is reflected back to the initial position. By using the propagation time and speed of the optical signal, the translation distance of the moving housing 2 along the sliding groove during the automatic focusing process of the optical lens is judged. The laser sensor 10 transmits the measurement result to the single-chip microcomputer 9 in the form of an electrical signal. The single-chip microcomputer 9 obtains the translation distance of the moving housing 2 during the automatic focusing process of the optical lens, so as to facilitate the subsequent control of the braking motor 68 to make the moving housing 2 perform automatic focusing reset;
[0022] High-precision focusing mechanism 6: It includes a stud 61, a first gear 62, a rotating ring 63, an external gear ring 64, a fixing bracket 65, a second gear 66 and an internal gear ring 67. The stud 61 is rotatably connected to the upper chute through a first bearing. The stud 61 is threadedly connected to the moving shell 2. The right end of the stud 61 is provided with the first gear 62. The left side of the fixing seat 7 is rotatably connected to the rotating ring 63 through a second bearing. The outer side of the rotating ring 63 is provided with the external gear ring 64. The inner wall of the rotating ring 63 is provided with the internal gear ring 67. The external gear ring 64 is meshed with the first gear 62. The left side of the fixing seat 7 is provided with the fixing bracket 65. The middle of the fixing bracket 65 is rotatably connected to the second gear 66 through a rotating shaft. The second gear 66 is meshed with the internal gear ring 67. The high-precision focusing mechanism 6 further includes a braking motor 68. The braking motor 68 is arranged on the left side of the fixing bracket 65. The input end of the braking motor 68 is electrically connected to the output end of the single-chip microcomputer 9. The output shaft of the braking motor 68 is fixedly connected to the left end of the rotating shaft. The high-precision focusing mechanism 6 further includes a guide rod 69. The guide rod 69 is arranged in the lower chute. The moving shell 2 is slidably connected to the guide rod 69 through a round hole. When focusing on the optical lens, the single-chip microcomputer 9 starts the photosensitive chip 11. The photosensitive chip 11 detects the plane and optical axis of the optical lens and transmits the result to the single-chip microcomputer 9 in the form of an electrical signal. Subsequently, the single-chip microcomputer 9 starts the braking motor 68 to drive the rotating shaft to rotate through its output shaft. The rotating shaft makes the rotating ring 63 rotate through the meshing connection between the second gear 66 and the internal gear ring 67. The rotating ring 63 makes the stud 61 rotate through the meshing connection between the external gear ring 64 and the first gear 62. The stud 61 makes the moving shell 2 slide horizontally along the chute through the threaded connection with the moving shell 2, so as to automatically adjust the position of the first lens 3 horizontally. During this process, the moving shell 2 slides along the guide rod 69 through the round hole, thereby improving the horizontal movement stability of the moving shell 2. When the optical lens moves to a position where the plane of the optical lens is parallel to the plane of the photosensitive chip and the optical axis of the optical lens coincides with the optical center of the photosensitive chip, at this time, the single-chip microcomputer 9 obtains that the automatic focusing of the device is completed. Subsequently, the single-chip microcomputer 9 turns off the braking motor 68. During the automatic focusing process of the device on the optical lens, through the tooth number ratio of the second gear 66 and the internal gear ring 67, the tooth number ratio of the first gear 62 and the external gear ring 64, and the lead of the thread of the stud 61, the number of turns that the output shaft of the braking motor 68 needs to rotate when the stud 61 rotates one circle is increased, and the moving distance of the moving shell 2 corresponding to one circle of rotation of the output shaft of the braking motor 68 is reduced, thereby improving the focusing accuracy of the device on the optical lens. This device can automatically focus on the optical lens through photosensitive elements and transmission elements, which is convenient to use. At the same time, the device is connected by meshing of gears and gear rings, and the tooth number ratio between the two is used to reduce the translation distance of the moving shell 2 when the rotating shaft rotates one circle, thereby improving the focusing accuracy of the device on the optical lens.
[0023] The working principle of a focus adjustment device for an optical lens provided by the present utility model is as follows: When focusing on the optical lens, the single-chip microcomputer 9 activates the photosensitive chip 11. The photosensitive chip 11 detects the plane and optical axis of the optical lens and transmits the results to the single-chip microcomputer 9 in the form of electrical signals. Subsequently, the single-chip microcomputer 9 activates the braking motor 68, and its output shaft drives the rotating shaft to rotate. The rotating shaft makes the rotating ring 63 rotate through the meshing connection between the second gear 66 and the internal gear ring 67. The rotating ring 63 makes the stud 61 rotate through the meshing connection between the external gear ring 64 and the first gear 62. The stud 61 is threadedly connected to the moving shell 2, so that the moving shell 2 slides horizontally along the chute, thereby automatically adjusting the position of the first lens 3 horizontally. During this process, the moving shell 2 slides along the guide rod 69 through the round hole, thereby improving the horizontal movement stability of the moving shell 2. When the optical lens moves to be parallel to the plane of the photosensitive chip and the optical axis of the optical lens coincides with the optical center of the photosensitive chip, at this time, the single-chip microcomputer 9 obtains that the automatic focusing of the device is completed. Subsequently, the single-chip microcomputer 9 turns off the braking motor 68. During the automatic focusing process of the device for the optical lens, by the tooth number ratio of the second gear 66 and the internal gear ring 67, the tooth number ratio of the first gear 62 and the external gear ring 64, and the thread lead of the stud 61, the number of turns that the output shaft of the braking motor 68 needs to rotate when the stud 61 rotates one circle is increased, and the moving distance of the moving shell 2 corresponding to one circle of rotation of the output shaft of the braking motor 68 is reduced, thereby improving the focusing accuracy of the device for the optical lens. The anti-slip pattern 5 is used to increase the contact friction force and avoid the relative sliding phenomenon at the contact part between the staff's hand and the device. During the automatic focusing process of the optical lens, the single-chip microcomputer 9 activates the laser sensor 10. The laser sensor 10 emits a light signal that irradiates the left side of the external gear ring 64 and is reflected to the initial position. By using the light signal propagation time and speed, the translation distance of the moving shell 2 along the chute during the automatic focusing process of the optical lens is judged. The laser sensor 10 transmits the measurement result to the single-chip microcomputer 9 in the form of an electrical signal. The single-chip microcomputer 9 obtains the translation distance of the moving shell 2 during the automatic focusing process of the optical lens, thereby facilitating the subsequent control of the braking motor 68 to make the moving shell 2 perform automatic focusing reset.
[0024] It should be noted that in the above embodiments, the single-chip microcomputer 9 disclosed can be COP8CBE9, the braking motor 68 can be WS-50ZYT78-R, the laser sensor 10 can be WH-LRF laser rangefinder, and the photosensitive chip 11 can be MN34220PLJ. The single-chip microcomputer 9 controls the braking motor 68, the laser sensor 10, and the photosensitive chip 11 to work using the commonly used methods in the prior art.
[0025] The above are only embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.
Claims
1. An optical lens focusing device, characterized in that: It includes a lens barrel housing (1) and a high-precision focusing mechanism (6); Lens barrel housing (1): Symmetrically distributed sliding grooves are provided on its inner wall. A moving housing (2) is slidably connected between the sliding grooves. A fixed seat (7) is provided at the right end of the lens barrel housing (1). A plane glass (8) is provided in the middle of the fixed seat (7). A photosensitive chip (11) is provided on the left side of the plane glass (8); High-precision focusing mechanism (6): It includes a stud (61), a first gear (62), a rotating ring (63), an external gear ring (64), a fixed bracket (65), a second gear (66) and an internal gear ring (67). The stud (61) is rotatably connected to the upper sliding groove through a first bearing. The stud (61) is threadedly connected to the moving housing (2). A first gear (62) is provided at the right end of the stud (61). The left side of the fixed seat (7) is rotatably connected to a rotating ring (63) through a second bearing. An external gear ring (64) is provided on the outer side of the rotating ring (63). An internal gear ring (67) is provided on the inner wall of the rotating ring (63). The external gear ring (64) is meshed and connected to the first gear (62). A fixed bracket (65) is provided on the left side of the fixed seat (7). A second gear (66) is rotatably connected to the middle of the fixed bracket (65) through a rotating shaft. The second gear (66) is meshed and connected to the internal gear ring (67).
2. The optical lens focusing device according to claim 1, characterized in that: A single-chip microcomputer (9) is provided on the outer side of the lens barrel housing (1). The input end of the single-chip microcomputer (9) is electrically connected to an external power supply. The photosensitive chip (11) is bidirectionally electrically connected to the single-chip microcomputer (9).
3. An optical lens focusing device according to claim 1, characterized in that: A first lens (3) is provided at the left end of the moving housing (2). A second lens (4) is provided inside the lens barrel housing (1).
4. An optical lens focusing device according to claim 1, characterized in that: Anti-slip patterns (5) are evenly distributed on the outer side right end of the lens barrel housing (1).
5. An optical lens focusing device according to claim 2, characterized in that: The high-precision focusing mechanism (6) further includes a braking motor (68). The braking motor (68) is provided on the left side of the fixed bracket (65). The input end of the braking motor (68) is electrically connected to the output end of the single-chip microcomputer (9). The output shaft of the braking motor (68) is fixedly connected to the left end of the rotating shaft.
6. An optical lens focusing device according to claim 1, characterized in that: The high-precision focusing mechanism (6) further includes a guide rod (69). The guide rod (69) is provided in the lower sliding groove. The moving housing (2) is slidably connected to the guide rod (69) through a round hole.
7. An optical lens focusing device according to claim 2, characterized in that: A laser sensor (10) is provided on the right side of the moving housing (2). The laser sensor (10) is bidirectionally electrically connected to the single-chip microcomputer (9).