Optical lens with variable aperture

Abstract

The present invention discloses an optical lens with a variable aperture, comprising an optical component, wherein an aperture adjustment mechanism for adjusting the aperture size is arranged on the optical component, and the aperture adjustment mechanism comprises an aperture adjustment mechanism and a light barrier driving mechanism. Since the present invention arranges the aperture adjustment mechanism on the optical component, and also arranges the light barrier driving mechanism for driving the light barrier of the aperture adjustment mechanism on the optical component, and the linkage mechanism between the light barrier driving mechanism and the light barrier on the aperture adjustment mechanism is a direct contact type, it is ensured that the light barrier driving mechanism drives the aperture adjustment mechanism to move reliably and effectively, thereby meeting the requirements of users.

Description

Technical Field

[0001] The invention relates to the field of optics, in particular to an optical lens with adjustable aperture size. Background Art

[0002] As we all know, at present, the optical lenses used in digital cameras and surveillance cameras have the following technical problems to be solved: 1) The quality of optical lens imaging during the day and at night is very different. Often, the natural light is sufficient during the day and the image is clear, while the light at night is weak and the image is unclear; 2) The imaging positions during the day and at night do not overlap, which will affect the imaging quality in a certain period of time; 3) Ordinary optical lenses adjust the imaging quality by zooming, which has a complex structure, large volume, and high manufacturing cost;

[0003] In response to the above problems, the applicant has proposed a Chinese invention patent entitled "An optical lens with variable aperture driven by electromagnetic force" (application number: 201220032380.3). The application discloses a lens housing, a plurality of lenses installed in the lens housing, a sliding light bar is arranged on the optical axis where the plurality of lenses are located, and the sliding light bar is provided with a large aperture and a small aperture. A control mechanism is arranged in the lens housing, and the control mechanism includes a coil wound on an iron core and magnets installed on both sides of the sliding light bar. The lens housing includes a lens ring and a lens barrel, the lens ring is installed in the front section of the lens barrel, a slide groove is arranged on the front end of the lens barrel, the sliding light bar is nested in the slide groove and can move back and forth along the slide groove, the magnets on both sides of the sliding light bar respectively correspond to a group of iron cores wound with coils, and the iron cores wound with coils are installed in the lens barrel. The sliding light bar is controlled by the control mechanism to move so that the large aperture or the small aperture is on the optical axis, thereby controlling the light flux of the optical lens. Such a technical solution can make the imaging both stable and clear during the day and at night, but it still has the following disadvantages: (1) It is difficult to detect. The optical components and the electronic drive components can only be detected after they are combined into a whole. When there is a problem with the optical components or the electronic drive components, the components must be disassembled and reassembled after the problem is solved. The whole process requires a lot of manpower and material resources and is time-consuming; (2) The installation of the light bar is unstable and may fall off. It is also difficult to control and the coaxiality of the optical axis is difficult to ensure; (3) The electromagnet drive structure is relatively complex. In response to the above problems, the applicant once again proposed a Chinese invention patent entitled "An optical lens with non-contact permanent magnet drive variable aperture" (application number: 201320468787.5). The application discloses a technical solution for dividing the optical lens into two independent parts, an optical component and an electronic drive component. Before assembly, the two independent parts can be inspected separately and then assembled together. The inspection work is very convenient, avoiding the need to combine the optical components and the electronic drive components into a whole before inspection, and saving manpower and material resources after assembly. However, the assembly of the optical component and the electronic drive component of the optical lens is relatively complicated and difficult to position. They must be accurately aligned, screwed, and finally glued and reinforced.

[0004] In response to the above problems, the applicant once again proposed a Chinese invention patent entitled "A non-contact permanent magnet driven variable aperture optical lens" (patent number: 201420244060.3). The assembly structure of the optical lens is simple. The assembly is quick, time-saving and labor-saving, but the electronic drive component of the optical lens and the switching light bar are non-contact, the drive is unreliable, and the drive is prone to be unsmooth. Summary of the invention

[0005] In order to solve the above problems, the object of the present invention is to provide an optical lens with a simple structure, which can adjust the aperture size and ensure reliable adjustment of the aperture size.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] An optical lens with a variable aperture comprises an optical component, wherein the optical component is provided with an aperture adjustment device for adjusting the aperture size.

[0008] The aperture adjustment device comprises:

[0009] An aperture adjustment mechanism, the aperture adjustment mechanism comprising an aperture base, the aperture base is provided with an aperture hole for light to pass through, and at both ends of the aperture base are rotatably provided with aperture plates capable of opening or blocking the aperture hole;

[0010] A light barrier sheet driving mechanism, the light barrier sheet driving mechanism is fixedly arranged on the optical component, and the light barrier sheet driving mechanism comprises a base, a dial ring capable of rotating relative to the base is movably arranged on the base, and a linkage mechanism capable of driving two light barrier sheets to rotate respectively is correspondingly arranged on the dial ring;

[0011] At the same time, the base is provided with a magnetic field generating device capable of switching magnetic poles when powered on, and the dial ring is provided with at least one magnetic field generating mechanism located on one side of the magnetic field generating device;

[0012] The magnetic field generating device and the magnetic field generating mechanism can generate a mutually attractive suction force or a mutually repulsive repulsive force to drive the dial to rotate relative to the base.

[0013] As an improvement of the above technical solution, the magnetic field generating device is an electromagnetic coil or an electromagnet.

[0014] As a further improvement of the above technical solution, the dial ring is provided with two magnetic field generating mechanisms respectively located on both sides of the magnetic field generating device.

[0015] In the present invention, the magnetic field generating mechanism is a permanent magnet or an electromagnetic coil.

[0016] Wherein, a rotating pin located on one side of the aperture hole is fixedly arranged on both ends of the aperture base, and a rotating hole cooperating with the rotating pin is correspondingly opened on the aperture plate, and the aperture plate can rotate around the rotating pin relative to the aperture base.

[0017] Furthermore, the linkage mechanism comprises a prying pin and a prying hole which are engaged with each other, one of the prying pin and the prying hole is arranged on the prying ring, and the other is arranged on the light barrier sheet.

[0018] Furthermore, the detent pin is fixedly arranged on the detent ring, the detent hole is opened on the aperture plate, and at the same time, an arc hole for the detent pin to pass through is also opened on the aperture base, and the detent pin is inserted into the arc hole and can move back and forth in the arc hole.

[0019] In a preferred embodiment of the present invention, the light barrier sheet includes a connecting handle, one end of which is rotatably connected to the aperture base, and the other end is provided with a crescent-shaped shielding portion, and an inwardly recessed arc-shaped notch is provided in the middle of the inner side wall of the shielding portion.

[0020] The beneficial effects of the present invention are as follows: since the present invention provides an aperture adjustment mechanism on the optical component, and also provides a light barrier driving mechanism on the optical component for driving the light barrier of the aperture adjustment mechanism, and the linkage mechanism between the light barrier driving mechanism and the light barrier on the aperture adjustment mechanism is a direct contact type, thereby ensuring that the light barrier driving mechanism drives the aperture adjustment mechanism to move reliably and effectively, thereby meeting the requirements of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

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

[0023] Figure 2 It is a schematic diagram of the structural decomposition of a preferred embodiment of the present invention;

[0024] Figure 3 It is a partial structural decomposition schematic diagram of a preferred embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of the appearance structure of the aperture adjustment mechanism in a preferred embodiment of the present invention when it is in a small aperture state;

[0026] Figure 5 is a schematic diagram of the appearance structure of the aperture adjustment mechanism in a preferred embodiment of the present invention when it is in a large aperture state;

[0027] Figure 6 is a bottom view of the aperture adjustment mechanism in a preferred embodiment of the present invention when it is in a small aperture state;

[0028] Figure 7 is a bottom view of the aperture adjustment mechanism in a preferred embodiment of the present invention when it is in a large aperture state;

[0029] Figure 8 It is a schematic diagram of the assembly structure of the aperture adjustment mechanism and the light barrier driving mechanism in a preferred embodiment of the present invention when the aperture is in a small aperture state;

[0030] Fig. 9 It is a schematic diagram of the assembly structure of the aperture adjustment mechanism and the light barrier driving mechanism in a preferred embodiment of the present invention when the aperture is in a large aperture state;

[0031] Fig.10 It is a structural schematic diagram of a light barrier sheet driving mechanism in a preferred embodiment of the present invention;

[0032] Fig.11 It is a schematic diagram of the structure of a light barrier in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0033] Reference Figures 1 to 11 , an optical lens with a variable aperture, comprising an optical component 10, wherein the optical component 10 is provided with an aperture adjustment device for adjusting the aperture size, and here, as a preferred embodiment of the present invention, the aperture adjustment device comprises an aperture adjustment mechanism 20 and an aperture plate driving mechanism 30, wherein the aperture adjustment mechanism 20 comprises an aperture base 21, wherein the aperture base 21 is provided with an aperture hole 210 for light to pass through, and at both ends of the aperture base 21, aperture plates 22 capable of opening or blocking the aperture hole 210 are rotatably provided, that is, the aperture base 21 is movably provided with two aperture plates 22 capable of rotating relative to the aperture base 21 and adjusting the opening area of ​​the aperture hole 210; The light barrier driving mechanism 30 is fixedly arranged on the optical component 10, and the light barrier driving mechanism 30 includes a base 31, on which a dial ring 32 capable of rotating relative to the base 31 is movably arranged, and the dial ring 32 is correspondingly provided with a linkage mechanism capable of driving the two light barrier plates 22 to rotate respectively; at the same time, a magnetic field generating device 40 capable of switching magnetic poles when powered is arranged on the base 31, and at least one magnetic field generating mechanism 50 located on one side of the magnetic field generating device 40 is arranged on the dial ring 32; wherein, the magnetic field generating device 40 and the magnetic field generating mechanism 50 can generate mutually attractive suction or mutually repulsive repulsion to drive the dial ring 32 to rotate relative to the base 31.

[0034] In the present invention, when the dial ring 32 rotates relative to the base 31, the dial ring 32 drives the two aperture plates 22 to rotate relative to the aperture base 21 through the linkage mechanism thereon, thereby adjusting the opening area of ​​the aperture hole 210 to achieve the purpose of adjusting the aperture size.

[0035] Since the present invention is provided with an aperture adjustment mechanism 20 on the optical component 10, and a light bar driving mechanism 30 for driving the light bar 22 of the aperture adjustment mechanism 20 is also provided on the optical component 10, and the contact of the linkage mechanism between the light bar driving mechanism 30 and the light bar 22 on the aperture adjustment mechanism 20 is direct contact, it is ensured that the light bar driving mechanism 30 drives the aperture adjustment mechanism 20 to move reliably and effectively, thereby meeting the requirements of users. At the same time, the optical lens of the present invention adopts the above structure, so that the aperture change range of the optical lens of the present invention is F0.8-F16.0.

[0036] Here, in order to enable the magnetic field generating device 40 to better switch the magnetic poles at both ends when powered on, preferably, the magnetic field generating device 40 is an electromagnetic coil or an electromagnet. Therefore, the magnetic poles at both ends of the magnetic field generating device 40 can change with the current direction of the circuit connected thereto, which is simple and convenient.

[0037] Reference Figures 8 to 10 In order to enable the light barrier plate driving mechanism 30 to better drive the light barrier plate 22 on the aperture adjustment mechanism 20 to rotate, here, preferably, the dial ring 32 is provided with two magnetic field generating mechanisms 50 respectively located on both sides of the magnetic field generating device 40. Further preferably, the magnetic field generating mechanism 50 is a permanent magnet or an electromagnetic coil. In the present invention, preferably, the magnetic field generating mechanism 50 is a permanent magnet. Therefore, the magnetic field generating device 40 arranged on the base 31 attracts or repels the magnetic field generating mechanism 50 located on one side thereof, thereby driving the dial ring 32 to rotate relative to the base 31, and at this time, the dial ring 32 can drive the light barrier plate 22 to rotate through the linkage mechanism.

[0038] Reference Figures 4 to 7 In order to make the dial ring 32 better drive the light barrier sheet 22 to rotate, preferably, a rotation pin 211 located on one side of the light barrier hole 210 is fixedly provided on both ends of the aperture base 21, and a rotation hole matching with the rotation pin 211 is correspondingly provided on the light barrier sheet 22, and the light barrier sheet 22 can rotate relative to the aperture base 21 around the rotation pin 211. During assembly, the rotation pin 211 is inserted into the rotation hole, so the light barrier sheet 22 can rotate around the rotation pin 211 at will.

[0039] In the present invention, in order to enable the light barrier sheet driving mechanism 30 to better drive the light barrier sheet 22 on the aperture adjustment mechanism 20 to rotate, as a preferred embodiment of the present invention, the linkage mechanism includes a pin 321 and a hole 322 that are mutually engaged, and one of the pin 321 and the hole 322 is arranged on the dial ring 32, and the other is arranged on the light barrier sheet 22. That is, when the pin 321 is arranged on the dial ring 32, the hole 322 is opened on the light barrier sheet 22; if the pin 321 is arranged on the light barrier sheet 22, the hole 322 is arranged on the dial ring 32.

[0040] Further preferably, the push pin 321 is fixedly arranged on the push ring 32, and the push hole 322 is opened on the aperture plate 22. At the same time, the aperture base 21 also has an arc hole 212 for the push pin 321 to pass through. The push pin 321 is inserted into the arc hole 212 and can move back and forth in the arc hole 212.

[0041] Here, the aperture adjustment mechanism 20 is arranged above the light barrier driving mechanism 30, and the push pin 321 passes through the arc hole 212 on the aperture base 21 from bottom to top and is inserted into the push hole 322 of the light barrier 22. Therefore, when the magnetic field generating device 40 attracts or repels the magnetic field generating mechanism 50, it can drive the push ring 32 to rotate forward or reverse relative to the base 31. The push ring 32 cooperates with the push hole 322 of the light barrier 22 through the push pin 321 thereon, thereby driving the light barrier 22 to rotate forward or reverse.

[0042] Reference Fig.11 In order to facilitate the production and installation of the light barrier 22, here, preferably, the light barrier 22 includes a connecting handle 220, one end of the connecting handle 220 is rotatably connected to the aperture base 21, and the other end is provided with a crescent-shaped shielding portion 221, and an inwardly recessed arc-shaped notch 222 is provided in the middle of the inner side wall of the shielding portion 221, the rotating hole is provided in the middle of the connecting handle 220, and the shifting hole 322 is provided on the outer peripheral piece of one end of the connecting handle 220 away from the shielding portion 221.

[0043] The above description is only a preferred implementation mode of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means belongs to the protection scope of the present invention.

Claims

1. An optical lens with a variable aperture, comprising an optical component (10), wherein the optical component (10) is provided with an aperture adjustment device for adjusting the aperture size, characterized in that: The aperture adjustment device comprises: An aperture adjustment mechanism (20), the aperture adjustment mechanism (20) comprising an aperture base (21), the aperture base (21) being provided with an aperture hole (210) for light to pass through, and aperture plates (22) capable of opening or blocking the aperture hole (210) being rotatably arranged at both ends of the aperture base (21); A light barrier sheet driving mechanism (30), the light barrier sheet driving mechanism (30) being fixedly arranged on the optical component (10), the light barrier sheet driving mechanism (30) comprising a base (31), a dial ring (32) being movably arranged on the base (31) and being capable of rotating relative thereto, and a linkage mechanism being correspondingly arranged on the dial ring (32) and being capable of driving two light barrier sheets (22) to rotate respectively; At the same time, the base (31) is provided with a magnetic field generating device (40) capable of switching magnetic poles when powered on, and the dial ring (32) is provided with at least one magnetic field generating mechanism (50) located on one side of the magnetic field generating device (40); The magnetic field generating device (40) and the magnetic field generating mechanism (50) can generate a mutually attractive suction force or a mutually repulsive repulsive force to drive the shifting ring (32) to rotate relative to the base (31); The dial ring (32) is provided with two magnetic field generating mechanisms (50) respectively located on both sides of the magnetic field generating device (40); The two magnetic field generating mechanisms (50) and the magnetic field generating device (40) are arranged along the peripheral wall of the dial ring (32), and the two magnetic field generating mechanisms (50) and the magnetic field generating device (40) are both located on the periphery of the light barrier hole (210).

2. The optical lens with variable aperture according to claim 1, characterized in that: The magnetic field generating device (40) is an electromagnetic coil or an electromagnet.

3. An optical lens with a variable aperture according to any one of claims 1 to 2, characterized in that: The magnetic field generating mechanism (50) is a permanent magnet or an electromagnetic coil.

4. The optical lens with variable aperture according to claim 1, characterized in that: A rotating pin (211) located at one side of the light barrier hole (210) is fixedly arranged at both ends of the aperture base (21), and a rotating hole matching with the rotating pin (211) is correspondingly opened on the light barrier sheet (22). The light barrier sheet (22) can rotate relative to the aperture base (21) around the rotating pin (211).

5. The optical lens with variable aperture according to claim 1, characterized in that: The linkage mechanism comprises a detent pin (321) and a detent hole (322) which are engaged with each other. One of the driving pin (321) and the driving hole (322) is arranged on the driving ring (32), and the other is arranged on the light barrier sheet (22).

6. The optical lens with variable aperture according to claim 5, characterized in that: The detent pin (321) is fixedly arranged on the detent ring (32), and the detent hole (322) is opened on the light barrier sheet (22). At the same time, the aperture base (21) is also provided with an arc-shaped hole (212) for the detent pin (321) to pass through, and the detent pin (321) is inserted into the arc-shaped hole (212) and can move back and forth in the arc-shaped hole (212).

7. The optical lens with variable aperture according to claim 1, characterized in that: The light barrier sheet (22) comprises a connecting handle (220), one end of which is rotatably connected to the aperture base (21), and the other end of which is provided with a crescent-shaped shielding portion (221), wherein an inwardly recessed arc-shaped notch (222) is provided in the middle of the inner side wall of the shielding portion (221).

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