Optical lens capable of detecting focusing movement position in real time and imaging device

Abstract

The invention discloses an optical lens capable of detecting a focusing moving position in real time and an imaging device, and relates to the technical field of optical lenses, the optical lens capable of detecting the focusing moving position in real time comprises a lens barrel, a moving group, a driving structure and a detection structure, the lens barrel is provided with a cavity; the mobile group is movably installed in the cavity along the length direction of the lens cone. The driving structure is in driving connection with the moving group and is used for driving the moving group to move; the detection structure comprises an inductive sensor assembly and a trigger body used for triggering the inductive sensor assembly, the trigger body is arranged in the mobile group, and the inductive sensor assembly is correspondingly arranged in the lens barrel, so that the inductive sensor assembly can trigger the lens barrel in the moving process of the mobile group. The inductive sensor assembly records the relative movement position of the trigger body. According to the scheme, the detection structure is arranged to detect the position of the moving group in the moving process, and control over the real-time position of the optical lens is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of optical lenses, and in particular to an optical lens and an imaging device capable of detecting a focus moving position in real time. Background Art

[0002] Zoom lenses are widely used in security monitoring, consumer electronics, automobiles, medical and other fields due to their ability to flexibly adjust focal length and quickly adapt to different scenarios.

[0003] Existing zoom lenses are usually driven by voice coil motors or stepper motors for zooming. However, the existing driving methods are not precise enough, especially after the lens has been used for a long time, the moving group cannot accurately reach the specific required focal length position. How to design an optical lens that can accurately control the lens position is a problem that needs to be solved urgently. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical lens and an imaging device that can detect the focus movement position in real time, aiming to solve the problem that the current optical lens cannot accurately control the lens position.

[0005] To achieve the above object, the present invention provides an optical lens capable of detecting a focus movement position in real time, comprising:

[0006] The lens barrel has a cavity;

[0007] A movable group is movably installed in the cavity along the length direction of the lens barrel;

[0008] A driving structure, drivingly connected to the mobile group, for driving the mobile group to move; and

[0009] The detection structure includes an inductive sensor component and a trigger body for triggering the inductive sensor component, wherein the trigger body is arranged on the moving group, and the inductive sensor component is correspondingly arranged on the lens barrel, so that during the activity of the moving group, the inductive sensor component records the relative movement position of the trigger body.

[0010] In one embodiment, the driving structure comprises:

[0011] A focus ring is sleeved on the outside of the lens barrel and is drivingly connected to the moving group so as to drive the moving group to move along the length direction of the lens barrel when the focus ring rotates; and

[0012] A driving member is drivingly connected to the focus ring and is used to drive the focus ring to rotate.

[0013] In one embodiment, a guide rod extending radially along the lens barrel is provided on the moving group, and the guide rod extends out of the lens barrel;

[0014] The focus ring is provided with a first guide groove, the length direction of the first guide groove is arranged at an angle with the optical axis direction, and the side wall of the first guide groove in the width direction abuts against the peripheral side of the guide rod.

[0015] In one embodiment, the lens barrel is provided with a second guide groove corresponding to the guide rod, and the second guide groove extends along the optical axis direction to guide the guide rod to move along the optical axis direction.

[0016] In one embodiment, a dimension of the first guide groove in the optical axis direction is smaller than a dimension of the second guide groove in the optical axis direction.

[0017] In one embodiment, buffer portions are provided on both sides of the first guide groove in the length direction.

[0018] In one embodiment, a first gear is provided on the focus ring;

[0019] The driving member comprises:

[0020] a second gear meshing with the first gear;

[0021] a stepping motor, used to drive the second gear to rotate; and

[0022] A mounting bracket is arranged outside the lens barrel and is used for mounting the stepping motor.

[0023] In one embodiment, the mounting bracket is covered on the first gear to limit the rotation range of the first gear.

[0024] In one embodiment, the inductive sensor assembly includes a PCB circuit board with a TMR chip welded thereon, and the trigger body includes an inductive magnet. The PCB circuit board with the TMR chip welded thereon can detect the relative position of the inductive magnet in real time.

[0025] The present invention further provides an imaging device, comprising the above-mentioned optical lens capable of detecting the focus movement position in real time, wherein the optical lens capable of detecting the focus movement position in real time comprises:

[0026] The lens barrel has a cavity;

[0027] A movable group is movably installed in the cavity along the length direction of the lens barrel;

[0028] A driving structure, drivingly connected to the mobile group, for driving the mobile group to move; and

[0029] The detection structure includes an inductive sensor component and a trigger body for triggering the inductive sensor component, wherein the trigger body is arranged on the moving group, and the inductive sensor component is correspondingly arranged on the lens barrel, so that during the activity of the moving group, the inductive sensor component records the relative movement position of the trigger body.

[0030] The technical solution provided by the present invention realizes the zoom of the optical lens by movably setting the mobile group in the lens barrel, and realizes the control of the mobile group by setting the driving structure. Furthermore, by setting the detection structure, it includes a sensing sensor component and a trigger body for triggering the sensing sensor component, wherein the trigger body is arranged in the mobile group, and the sensing sensor component is correspondingly arranged in the lens barrel, so that during the movement of the mobile group, the sensing sensor component records the relative movement position of the trigger body, thereby realizing real-time position control of the optical lens, improving the position accuracy of the driving structure after driving the mobile group, and further improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 A schematic structural diagram of an embodiment of an optical lens capable of detecting a focus movement position in real time provided by the present invention;

[0033] Figure 2 for Figure 1 A schematic diagram of a partial explosion of an optical lens capable of detecting the focus movement position in real time under a certain viewing angle;

[0034] Figure 3 for Figure 1 A schematic diagram of a partial explosion of an optical lens capable of detecting the focus movement position in real time under another viewing angle;

[0035] Figure 4 for Figure 1 Schematic diagram of the structure of the middle lens barrel and focusing ring at one viewing angle.

[0036] Description of Figure Numbers:

[0037] 100. An optical lens capable of detecting a focus moving position in real time; 1. a lens barrel; 11. a barrel body; 111. a second guide groove; 12. a mounting seat; 2. a moving group; 21. a guide rod; 3. a driving structure; 31. a focus ring; 311. a first guide groove; 312. a first gear; 32. a driving member; 321. a second gear; 322. a stepping motor; 323. a mounting bracket; 4. a detecting structure; 41. an inductive sensor assembly; 411. a PCB circuit board having a TMR chip welded thereon; 42. a trigger body; 421. an inductive magnet.

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] Zoom lenses are widely used in security monitoring, consumer electronics, automobiles, medical and other fields due to their ability to flexibly adjust focal length and quickly adapt to different scenarios.

[0043] Existing zoom lenses are usually driven by voice coil motors or stepper motors for zooming. However, the existing driving methods are not precise enough, especially after the lens has been used for a long time, the moving group cannot accurately reach the specific required focal length position. How to design an optical lens that can accurately control the lens position is a problem that needs to be solved urgently.

[0044] The main purpose of the present invention is to provide an optical lens and an imaging device that can detect the focus movement position in real time, aiming to solve the problem that the current optical lens cannot accurately control the lens position.

[0045] See also Figure 1 To achieve the above-mentioned purpose, the present invention proposes an optical lens 100 capable of detecting a focus moving position in real time, comprising a lens barrel 1, a moving group 2, a driving structure 3 and a detection structure 4, wherein the lens barrel 1 has a cavity; the moving group 2 is movably installed in the cavity along the length direction of the lens barrel 1; the driving structure 3 is drivingly connected to the moving group 2 to drive the moving group 2 to move; the detection structure 4 comprises a sensing sensor component 41 and a triggering body 42 for triggering the sensing sensor component 41, wherein the triggering body 42 is arranged on the moving group 2, and the sensing sensor component 41 is correspondingly arranged on the lens barrel 1, so that during the movement of the moving group 2, the sensing sensor component 41 records the relative moving position of the triggering body 42.

[0046] The technical solution provided by the present invention realizes the zooming of the optical lens by movably setting the mobile group 2 in the lens barrel 1, and realizes the control of the mobile group 2 by setting the driving structure 3. Further, by setting the detection structure 4, it includes a sensing sensor component 41 and a trigger body 42 for triggering the sensing sensor component 41, wherein the trigger body 42 is arranged in the mobile group 2, and the sensing sensor component 41 is correspondingly arranged in the lens barrel 1, so that during the movement of the mobile group 2, the sensing sensor component 41 records the relative movement position of the trigger body 42, thereby realizing real-time position control of the optical lens, improving the position accuracy of the driving structure 3 after driving the mobile group 2, and thus improving the work efficiency.

[0047] It is worth mentioning that in an embodiment provided by the present invention, the lens barrel 1 includes a mounting seat 12 and a barrel body 11 disposed on the mounting seat 12 , and the driving structure 3 is disposed on the mounting seat 12 , so as to facilitate driving connection with the mobile group 2 .

[0048] It should be noted that the present solution does not limit the specific implementation form of the driving structure 3. In a preferred embodiment of the present solution, the driving structure 3 includes a focus ring 31 and a driving member 32. The focus ring 31 is sleeved on the outside of the lens barrel 1 and is drivingly connected to the moving group 2 so that when the focus ring 31 rotates, the moving group 2 is driven to move along the length direction of the lens barrel 1; the driving member 32 is drivingly connected to the focus ring 31 to drive the focus ring 31 to rotate. In this way, the moving group 2 is driven by rotating the focus ring 31 sleeved on the outside of the lens, and the overall structure is relatively compact and easy to assemble.

[0049] In another embodiment of the present invention, the driving structure 3 is configured as a voice coil motor, and the voice coil motor is disposed inside the lens barrel 1 to directly drive the moving group 2 to move. This configuration greatly reduces the volume occupied by the overall structure.

[0050] For further information, please refer to Figure 4 The moving group 2 is provided with a guide rod 21 extending radially along the lens barrel 1, and the guide rod 21 extends out of the lens barrel 1; the focus ring 31 is provided with a first guide groove 311, the length direction of the first guide groove 311 is set at an angle with the optical axis direction, and the side wall of the first guide groove 311 in the width direction abuts against the peripheral side of the guide rod 21. In this way, the focus ring 31 can control the moving group 2 only by mechanical transmission, which has a simple structure, convenient operation, and is easy to assemble with other components, reducing the manufacturing cost of the structure.

[0051] Furthermore, the lens barrel 1 is provided with a second guide groove 111 corresponding to the guide rod 21, and the second guide groove 111 extends along the optical axis direction to guide the guide rod 21 to move along the optical axis direction. In this way, the second guide groove 111 limits the moving direction of the guide rod 21, thereby limiting the moving direction of the moving group 2, ensuring the accuracy of the forward and backward moving position of the optical lens, preventing the lens from rotating around the optical axis direction, and ensuring that the inductive sensor assembly 41 can work normally.

[0052] In order to prevent the guide rod 21 from interfering with the second guide groove 111, in one embodiment of the present invention, the dimension of the first guide groove 311 in the optical axis direction is smaller than the dimension of the second guide groove 111 in the optical axis direction. With such a design, when the guide rod 21 is at the limit position of the first guide groove 311, the guide rod 21 is still at a certain distance from the limit position on the second guide groove 111, thereby effectively preventing the guide rod 21 from getting stuck.

[0053] Furthermore, buffer parts are provided on both sides of the length direction of the first guide groove 311. By providing the buffer part, the loss caused when the guide rod 21 accidentally collides with the first guide groove 311 is reduced, and at the same time, it also has the function of warning the operator in advance that the extreme focusing position is about to be entered. It is worth mentioning that the present invention does not limit the specific implementation method of the buffer part. For example, the buffer part can be set as a spring, foam or other elastic object, or even as a repelling magnet installed on the guide rod 21 and the first guide groove 311 respectively.

[0054] In one embodiment of the present invention, please refer to Figure 3 The focus ring 31 is provided with a first gear 312; the driving member 32 includes a second gear 321, a stepping motor 322 and a mounting bracket 323, the second gear 321 is meshed with the first gear 312; the stepping motor 322 is used to drive the second gear 321 to rotate; the mounting bracket 323 is provided outside the lens barrel 1 for mounting the stepping motor 322. With such a configuration, the structure is relatively stable and easy to assemble, and the structure is simple, which reduces the manufacturing cost of the device.

[0055] Furthermore, the mounting bracket 323 is covered on the first gear 312 to limit the rotation range of the first gear 312. By covering the mounting bracket 323 on the first gear 312, the rotation range of the first gear 312 is limited, thereby preventing the first gear 312 from rotating too much, thereby preventing the guide rod 21 from interfering with the first guide groove 311.

[0056] In one embodiment of the present invention, please refer to Figure 2 The inductive sensor assembly 41 includes a PCB circuit board 411 welded with a TMR chip, and the trigger body 42 includes an inductive magnet 421. The PCB circuit board 411 welded with the TMR chip can detect the relative position of the inductive magnet 421 in real time. The TMR chip refers to a tunnel magnetoresistance chip, which has high sensitivity and stability, can detect weak magnetic field changes, and is often used in displacement sensors. By using a PCB circuit board 411 welded with a TMR chip, the occupied volume of the overall structure can be reduced, and more accurate data can be obtained, thereby improving the accuracy of position acquisition.

[0057] The present invention further proposes an imaging device, comprising the above-mentioned optical lens 100 capable of detecting the focus movement position in real time. Since the imaging device comprises the above-mentioned optical lens 100 capable of detecting the focus movement position in real time, the specific structure of the optical lens 100 capable of detecting the focus movement position in real time refers to the above-mentioned embodiment. Since the optical lens 100 capable of detecting the focus movement position in real time of the imaging device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0058] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An optical lens capable of detecting a focus moving position in real time, characterized in that: include: The lens barrel has a cavity; A movable group is movably installed in the cavity along the length direction of the lens barrel; A driving structure, drivingly connected to the mobile group, for driving the mobile group to move; as well as, The detection structure includes an inductive sensor component and a trigger body for triggering the inductive sensor component, wherein the trigger body is arranged on the moving group, and the inductive sensor component is correspondingly arranged on the lens barrel, so that during the activity of the moving group, the inductive sensor component records the relative movement position of the trigger body.

2. The optical lens capable of real-time detection of focus movement position according to claim 1, characterized in that: The driving structure comprises: A focus ring is sleeved on the outside of the lens barrel and is drivingly connected to the moving group so as to drive the moving group to move along the length direction of the lens barrel when the focus ring rotates; and A driving member is drivingly connected to the focus ring and is used to drive the focus ring to rotate.

3. The optical lens capable of real-time detection of focus movement position according to claim 2, characterized in that: The movable group is provided with a guide rod extending radially along the lens barrel, and the guide rod extends out of the lens barrel; The focus ring is provided with a first guide groove, the length direction of the first guide groove is arranged at an angle with the optical axis direction, and the side wall of the first guide groove in the width direction abuts against the peripheral side of the guide rod.

4. The optical lens capable of real-time detection of focus movement position according to claim 3, characterized in that: The lens barrel is provided with a second guide groove corresponding to the guide rod, and the second guide groove extends along the optical axis direction to guide the guide rod to move along the optical axis direction.

5. The optical lens capable of real-time detection of focus movement position according to claim 4, characterized in that: A dimension of the first guide groove in the optical axis direction is smaller than a dimension of the second guide groove in the optical axis direction.

6. The optical lens capable of real-time detection of focus movement position according to claim 4, characterized in that: Buffer parts are provided on both sides of the first guide groove in the length direction.

7. The optical lens capable of real-time detection of focus movement position according to claim 1, characterized in that: The focus ring is provided with a first gear; The driving member comprises: a second gear meshing with the first gear; a stepping motor, used to drive the second gear to rotate; and A mounting bracket is arranged outside the lens barrel and is used for mounting the stepping motor.

8. The optical lens capable of real-time detection of focus movement position according to claim 7, characterized in that: The mounting bracket is covered on the first gear to limit the rotation range of the first gear.

9. The optical lens capable of real-time detection of focus movement position according to claim 1, characterized in that: The inductive sensor assembly includes a PCB circuit board with a TMR chip welded thereon, and the trigger body includes an inductive magnet. The PCB circuit board with the TMR chip welded thereon can detect the relative position of the inductive magnet in real time.

10. An imaging device, characterized in that: The optical lens comprises the optical lens capable of detecting the focus movement position in real time as claimed in any one of claims 1 to 9.

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