Small high-definition optical lens

Abstract

The utility model discloses a small-sized high-definition optical lens, which comprises an installation barrel, a lens barrel in threaded connection with the interior of the installation barrel, a protection sheet attached to the top of the installation barrel, and an optical lens mechanism arranged in the lens barrel. The buckling mechanism is arranged in the mounting cylinder; and the dustproof mechanism is arranged between the mounting cylinder and the protection sheet. The utility model relates to the technical field of lenses, and the small-sized high-definition optical lens realizes the quick disassembly of the protection sheet through the cooperation of the cavity, the sleeve, the clamping hole, the connecting plate, the clamping block, the elastic sheet and the limiting part, and solves the problem that when the internal lens of the small-sized high-definition optical lens needs to be replaced, the protection sheet is adhered to the mounting cylinder, so that the replacement is not convenient. And a worker needs to blow hot air to the position of the protection sheet through an air duct and also needs to observe the glue melting condition all the time, so that the operation process often takes a lot of time.

Description

Technical Field

[0001] This utility model relates to the field of lens technology, specifically a small high-definition optical lens. Background Technology

[0002] With the widespread use of smartphones and other mobile devices, users have increasingly higher demands for their camera functions. In order to achieve high resolution and high image quality, high-performance optical lenses are required.

[0003] When using small high-definition optical lenses, the protective film is usually glued to the mounting tube outside the lens to protect the lens inside the lens tube. Then the small high-definition optical lens is installed into the mobile phone.

[0004] However, when it is necessary to replace the internal lens of a small high-definition optical lens, since the protective film is glued to the mounting tube, the staff needs to blow hot air onto the protective film using a blower, and the staff also needs to constantly observe the melting of the glue, which often makes this operation time-consuming. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a small high-definition optical lens, which solves the problem that when the internal lens of a small high-definition optical lens needs to be replaced, the protective film is glued to the mounting cylinder, requiring workers to blow hot air onto the protective film using a blower and constantly monitor the melting of the adhesive, resulting in a time-consuming operation.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a small high-definition optical lens, including a mounting tube, a lens barrel connected internally to the mounting tube, a protective sheet attached to the top of the mounting tube, the small high-definition optical lens also including an optical lens mechanism disposed inside the lens barrel; a snap-fit ​​mechanism disposed inside the mounting tube; and a dustproof mechanism disposed between the mounting tube and the protective sheet.

[0007] The lens uses an optical lens mechanism to refract and image external light, a snap-fit ​​mechanism to quickly remove the protective film, and a dustproof mechanism to prevent dust from entering the lens.

[0008] Preferably, the latching mechanism includes a cavity formed on the inner wall of the mounting cylinder; a sleeve fixedly connected to the outer wall of the protective sheet, with its inner wall fitting against the outer wall of the mounting cylinder; a latching hole formed on the inner wall of the sleeve; a connecting plate fixedly connected to the outer wall of the mounting cylinder by bolts; the outer wall of the latching block inserted into the inner wall of the latching hole and penetrating the connecting plate, and movably connected to the connecting plate; an elastic sheet fixedly connected to the inner wall of the cavity, with its side wall fitting against the side of the latching block away from the latching hole; and a limiting part disposed on the outside of the latching block; wherein, the sleeve presses against the latching block, causing the latching block to leave the latching hole, at which point the elastic sheet is compressed, thus disassembling the protective sheet.

[0009] Preferably, the limiting part includes a groove, which is formed on the inner wall of the mounting cylinder; the slider is fixedly connected to the outer wall of the locking block, and its end is slidably engaged with the inner wall of the groove; wherein, the slider slides in the groove under the drive of the locking block.

[0010] Preferably, the dustproof mechanism includes an annular groove, which is formed on the upper part of the outer wall of the mounting cylinder; an annular convex strip is fixedly connected to the bottom of the inner wall of the annular groove; the outer wall of the sealing ring is attached to the upper part of the annular convex strip and the lower part of the protective sheet; wherein, the sealing performance between the mounting cylinder and the protective sheet is improved by the annular groove, the annular convex strip and the sealing ring.

[0011] Preferably, the optical lens mechanism includes an aperture stop fixedly connected to the top of the lens barrel; a first lens disposed inside the lens barrel and below the aperture stop; a second lens disposed inside the lens barrel and below the first lens; a third lens disposed inside the lens barrel and below the second lens; a fourth lens disposed inside the lens barrel and below the third lens; a filter fixedly connected to the inner wall of the mounting cylinder and below the fourth lens; and a mounting portion disposed on the outer wall of the mounting cylinder. The aperture stop, the first lens, the second lens, the third lens, the fourth lens, and the filter are used to refract and image external light.

[0012] Preferably, the mounting part includes a connecting ear, which is fixedly connected to the lower outer wall of the mounting cylinder; a threaded hole is formed on the surface of the connecting ear; wherein the lens is installed into the inside of the mobile phone through the connecting ear and the threaded hole.

[0013] Beneficial effects

[0014] This utility model provides a small high-definition optical lens. It has the following advantages: This small high-definition optical lens, through the cooperation of a cavity, sleeve, locking hole, connecting plate, locking block, elastic sheet, and limiting part, achieves quick removal of the protective sheet. This solves the problem that when the internal lens of a small high-definition optical lens needs to be replaced, because the protective sheet is glued to the mounting cylinder, workers need to blow hot air onto the protective sheet using a blower, and constantly observe the melting of the adhesive, resulting in a time-consuming operation.

[0015] By combining the annular groove, annular convex strip, and sealing ring, dust is prevented from entering the lens. This solves the problem that during daily use of mobile phone lenses, fine dust particles can easily enter the lens through the gap between the mounting tube and the lens barrel under the action of airflow. Once dust adheres to the lens surface, light propagation will be interfered with, resulting in phenomena such as blurring, flare, and vignetting, which greatly reduces the clarity and contrast of the image and seriously affects the shooting effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the appearance of the present utility model;

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of the middle sleeve, the locking block, and the elastic plate;

[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 for Figure 3 Enlarged view of section B in the middle.

[0021] In the diagram: 1. Mounting cylinder; 2. Lens barrel; 3. Optical lens mechanism; 31. Aperture; 32. First lens; 33. Second lens; 34. Third lens; 35. Fourth lens; 36. Filter; 37. Mounting part; 371. Connecting ear; 372. Threaded hole; 4. Protective plate; 5. Buckling mechanism; 51. Cavity; 52. Sleeve; 53. Buckling hole; 54. Connecting plate; 55. Buckling block; 56. Elastic sheet; 57. Limiting part; 571. Slider; 572. Slide groove; 6. Dustproof mechanism; 61. Annular groove; 62. Annular protrusion; 63. Sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] When a small high-definition optical lens needs to have its internal lens replaced, the protective film is glued to the mounting tube. The operator needs to blow hot air onto the protective film using a blower and also needs to constantly monitor the melting of the glue, which often makes this operation time-consuming.

[0024] In view of this, the present invention provides a small high-definition optical lens that solves the problem of quick disassembly of the protective sheet through the cooperation of the cavity, sleeve, card hole, connecting plate, card block, elastic sheet and limiting part. It also solves the problem that when the internal lens of the small high-definition optical lens needs to be replaced, since the protective sheet is glued to the mounting tube, the operator needs to blow hot air on the protective sheet with a blower and constantly observe the melting of the glue, which often takes a lot of time.

[0025] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0026] Example 1: By Figure 1-5 As can be seen, a small high-definition optical lens includes a mounting tube 1, with a lens barrel 2 internally threaded onto the mounting tube 1. The inner wall of the mounting tube 1 has internal threads, and the outer wall of the lens barrel 2 has external threads. The mounting tube 1 is securely connected to the lens barrel 2 via a threaded connection. This connection method not only facilitates installation and disassembly but also ensures the precise and stable position of the lens barrel 2 within the mounting tube 1, providing a reliable foundation for the coordinated operation of the various optical components inside the lens. A protective plate 4 is attached to the top of the mounting tube 1, protecting the precision optical components inside the lens. The protective plate 4 is made of sapphire glass. The small high-definition optical lens also includes an optical lens mechanism 3, a locking mechanism 5, and a dustproof system. Mechanism 6, optical lens mechanism 3 is located inside lens barrel 2; inside mounting barrel 1, optical lens mechanism 3 is responsible for the refraction and imaging of light, which is the key to achieving high-definition shooting. Clip mechanism 5 is located inside mounting barrel 1; the design of clip mechanism 5 is to quickly remove protective film 4, greatly improving maintenance convenience. Dustproof mechanism 6 is located between mounting barrel 1 and protective film 4; dustproof mechanism 6 is dedicated to preventing dust from entering the lens, ensuring the cleanliness of the optical system, and maintaining the long-term stable performance of the lens. Specifically, optical lens mechanism 3 refracts and images external light, clip mechanism 5 quickly removes protective film 4, and dustproof mechanism 6 prevents dust from entering the lens.

[0027] In the specific implementation process, it is worth noting that the inner wall of the mounting tube 1 is provided with internal threads, and the outer wall of the lens tube 2 is provided with external threads. The mounting tube 1 is securely connected to the lens tube 2 by a threaded connection. This connection method not only facilitates installation and disassembly, but also ensures that the position of the lens tube 2 inside the mounting tube 1 is accurate and stable, providing a reliable foundation for the coordinated work of various optical components inside the lens. The protective plate 4 at the top of the mounting tube 1 plays a protective role for the precision optical components inside the lens. The protective plate 4 is made of sapphire glass. Inside the mounting tube 1, the optical lens mechanism 3 is responsible for the refraction and imaging of light, which is the key to achieving high-definition shooting. The design of the snap-fit ​​mechanism 5 is designed to quickly remove the protective plate 4, which greatly improves the convenience of maintenance. The dustproof mechanism 6 is dedicated to preventing dust from entering the lens, ensuring the cleanliness of the optical system, and maintaining the long-term stable performance of the lens.

[0028] Specifically, the mounting tube 1 is securely connected to the lens barrel 2 via a threaded connection. This connection method not only facilitates installation and disassembly but also ensures that the lens barrel 2 is positioned accurately and stably within the mounting tube 1, providing a reliable foundation for the coordinated operation of the various optical components inside the lens. The protective plate 4 on the top of the mounting tube 1 protects the precision optical components inside the lens. Inside the mounting tube 1, the optical lens mechanism 3 is responsible for the refraction and imaging of light, which is crucial for achieving high-definition shooting. The design of the snap-fit ​​mechanism 5 is intended to quickly remove the protective plate 4, greatly improving maintenance convenience. The dustproof mechanism 6 is dedicated to preventing dust from entering the lens, ensuring the cleanliness of the optical system, and maintaining the long-term stable performance of the lens.

[0029] Example 2: From Figure 1-5It can be seen that the latching mechanism 5 includes a cavity 51, a sleeve 52, a latching hole 53, a connecting plate 54, a latching block 55, an elastic sheet 56, and a limiting part 57. The cavity 51 is formed on the inner wall of the mounting cylinder 1; the sleeve 52 is fixedly connected to the outer wall of the protective sheet 4, and its inner wall is in contact with the outer wall of the mounting cylinder 1; when the protective sheet 4 needs to be removed, the operator moves the sleeve 52 upward, and the sleeve 52 presses against the latching block 55. The latching hole 53 is formed on the inner wall of the sleeve 52; the connecting plate 54 is fixedly connected to the outer wall of the mounting cylinder 1 by bolts; at this time, the latching block 55 moves in the connecting plate 54, and the latching block 55 presses against the elastic sheet 56. The latching block 55 leaves the latching hole 53, and the sleeve 52 drives the protective sheet 4 to move, removing the sleeve 52 from the mounting cylinder 1, and allowing the lens barrel 2 to be repositioned. The lens is replaced. The outer wall of the locking block 55 is inserted into the inner wall of the locking hole 53 and passes through the connecting plate 54, and is movably connected to the connecting plate 54. The elastic sheet 56 is fixedly connected to the inner wall of the cavity 51, and its side wall is attached to the side of the locking block 55 away from the locking hole 53. After completion, the operator inserts the sleeve 52 into the mounting cylinder 1. At this time, the locking block 55 is squeezed by the sleeve 52 again. When the sleeve 52 moves the locking hole 53 to the position of the locking block 55, the elastic sheet 56 rebounds and inserts the locking block 55 into the locking hole 53 through the elastic force, thus completing the lens replacement. The limiting part 57 is set on the outside of the locking block 55. In this case, the sleeve 52 squeezes the locking block 55, causing the locking block 55 to leave the locking hole 53. At this time, the elastic sheet 56 is compressed, and the protective sheet 4 is disassembled.

[0030] In the specific implementation process, it is worth noting that when it is necessary to remove the protective plate 4, the operator moves the sleeve 52 upward, and the sleeve 52 presses against the locking block 55. At this time, the locking block 55 moves in the connecting plate 54 and presses against the elastic plate 56. The locking block 55 leaves the locking hole 53, and the sleeve 52 drives the protective plate 4 to move. The sleeve 52 is removed from the mounting cylinder 1, and the lens inside the lens barrel 2 is replaced. After that, the operator inserts the sleeve 52 into the mounting cylinder 1. At this time, the locking block 55 is pressed by the sleeve 52 again. When the sleeve 52 drives the locking hole 53 to the position of the locking block 55, the elastic plate 56 rebounds and inserts the locking block 55 into the locking hole 53 through the elastic force, completing the lens replacement and realizing the quick removal of the protective plate 4.

[0031] Furthermore, the limiting part 57 includes a slider 571 and a groove 572. The groove 572 is formed on the inner wall of the mounting cylinder 1. The slider 571 is fixedly connected to the outer wall of the locking block 55, and its end is slidably engaged with the inner wall of the groove 572. When the locking block 55 moves, the locking block 55 drives the slider 571 to move. The slider 571 slides in the groove 572 to limit the locking block 55 and prevent the locking block 55 from falling out of the cavity 51. The slider 571 slides in the groove 572 under the drive of the locking block 55.

[0032] In the specific implementation process, it is worth noting that when the card block 55 moves, the card block 55 drives the slider 571 to move, and the slider 571 slides in the slide groove 572 to limit the card block 55 and prevent the card block 55 from falling out of the cavity 51.

[0033] Furthermore, the dustproof mechanism 6 includes an annular groove 61, an annular protrusion 62, and a sealing ring 63. The annular groove 61 is formed on the upper part of the outer wall of the mounting cylinder 1. The annular protrusion 62 is fixedly connected to the bottom of the inner wall of the annular groove 61. The operator places the sealing ring 63 into the annular groove 61, and makes the bottom of the sealing ring 63 contact the surface of the annular protrusion 62. The outer wall of the sealing ring 63 is attached to the upper part of the annular protrusion 62 and the lower part of the protective plate 4. When the protective plate 4 is attached to the top of the mounting cylinder 1, the protective plate 4 squeezes the sealing ring 63, so that the sealing ring 63 is compressed between the annular protrusion 62 and the protective plate 4. The sealing performance between the mounting cylinder 1 and the protective plate 4 is improved through the annular groove 61, the annular protrusion 62, and the sealing ring 63.

[0034] In the specific implementation process, it is worth noting that when the staff puts the sealing ring 63 into the annular groove 61 and makes the bottom of the sealing ring 63 contact the surface of the annular protrusion 62, when the protective sheet 4 is attached to the top of the mounting cylinder 1, the protective sheet 4 squeezes the sealing ring 63, so that the sealing ring 63 is compressed between the annular protrusion 62 and the protective sheet 4, thereby preventing dust from entering the lens.

[0035] Furthermore, the optical lens mechanism 3 includes an aperture stop 31, a first lens 32, a second lens 33, a third lens 34, a fourth lens 35, a filter 36, and a mounting part 37. The upper surface of the first lens 32 is an elliptical aspherical shape, and the lower surface is an oblate spheroid. The surface of the second lens 33 is a meniscus spherical shape. The upper surface of the third lens 34 is a hyperbolic aspherical shape, and the lower surface is a hyperbolic aspherical shape. The surface of the fourth lens 35 is a hyperbolic aspherical shape. The first lens 32, the second lens 33... The third lens 34 and the fourth lens 35 are connected to the lens barrel 2 by a pressure ring, and the aperture 31 is fixedly connected to the top of the lens barrel 2; the first lens 32 is located inside the lens barrel 2 and below the aperture 31; the second lens 33 is located inside the lens barrel 2 and below the first lens 32; the third lens 34 is located inside the lens barrel 2 and below the second lens 33; the fourth lens 35 is located inside the lens barrel 2 and below the third lens 34; external light first passes through the aperture 31. The aperture 31 controls the intensity of light entering the lens according to the shooting environment and shooting requirements. The light then passes sequentially through the first lens 32, the second lens 33, the third lens 34, and the fourth lens 35. These lenses refract and converge the light according to their respective optical parameters, accurately focusing the light onto the image sensor. The image sensor is typically located below the filter 36, which is fixedly connected to the inner wall of the mounting cylinder 1 and located below the fourth lens 35. In this process, by rationally designing the combination and parameters of the lenses, the propagation direction and focusing position of the light are precisely controlled, thereby forming a clear and accurate image of the object on the image sensor. The filter 36 filters the wavelength of the light before it reaches the image sensor, removing unwanted light components and further optimizing the color and quality of the image. The mounting part 37 is located on the outer wall of the mounting cylinder 1. The aperture 31, the first lens 32, the second lens 33, the third lens 34, the fourth lens 35, and the filter 36 refract and image the external light.

[0036] In the specific implementation process, it is worth noting that the upper surface of the first lens 32 is an elliptical aspherical shape, and the lower surface is an oblate ellipsoidal surface; the surface of the second lens 33 is a meniscus spherical shape; the upper surface of the third lens 34 is a hyperbolic aspherical surface, and the lower surface is a hyperbolic aspherical surface; the surface of the fourth lens 35 is a hyperbolic aspherical surface. The first lens 32, the second lens 33, the third lens 34, and the fourth lens 35 are connected to the lens barrel 2 by a retaining ring. External light first passes through the aperture 31, which controls the intensity of light entering the lens according to the shooting environment and shooting requirements. Subsequently, the light passes through the lens in sequence. After passing through the first lens 32, the second lens 33, the third lens 34, and the fourth lens 35, these lenses refract and converge the light according to their respective optical parameters, accurately focusing the light onto the image sensor. The image sensor is usually located below the filter 36. In this process, by rationally designing the combination and parameters of the lenses, the propagation direction and focusing position of the light are precisely controlled, thereby forming a clear and accurate image of the object on the image sensor. The filter 36 filters the wavelength of the light before it reaches the image sensor, removing unwanted light components and further optimizing the color and quality of the image.

[0037] Furthermore, the mounting part 37 includes a connecting ear 371 and a threaded hole 372. The connecting ear 371 is fixedly connected to the lower outer wall of the mounting cylinder 1; the threaded hole 372 is formed on the surface of the connecting ear 371; the operator passes the screw through the mounting hole reserved inside the mobile phone, and then screws it into the threaded hole 372 on the connecting ear 371, thereby firmly mounting the lens into the inside of the mobile phone. The lens is mounted into the inside of the mobile phone through the connecting ear 371 and the threaded hole 372.

[0038] In the specific implementation process, it is worth noting that the staff will pass the screw through the pre-drilled mounting hole inside the phone and then screw it into the threaded hole 372 on the connecting ear 371, thereby firmly installing the lens into the phone and realizing the installation of the lens into the phone.

[0039] Specifically, the staff inserts screws through the pre-drilled mounting holes inside the phone and then screws them into the threaded holes 372 on the connecting ear 371, thus securely mounting the lens into the phone. External light first passes through the aperture 31, which controls the intensity of light entering the lens according to the shooting environment and shooting requirements. The light then passes sequentially through the first lens 32, the second lens 33, the third lens 34, and the fourth lens 35. These lenses refract and converge the light according to their respective optical parameters, accurately focusing the light onto the image sensor. The image sensor is typically located below the filter 36. During this process, by rationally designing the combination and parameters of the lenses, the propagation direction and focusing position of the light are precisely controlled, thus forming a clear and accurate image of the object on the image sensor. The filter 36 filters the light wavelength before it reaches the image sensor, removing unwanted light components and further optimizing the image's color and quality. When it is necessary to remove the protective sheet 4, the staff moves the sleeve 5 upwards. 2. The sleeve 52 presses against the locking block 55. At this time, the locking block 55 drives the slider 571 to move. The slider 571 slides in the slide groove 572, and the locking block 55 moves in the connecting plate 54. The locking block 55 presses against the elastic sheet 56, and the locking block 55 leaves the locking hole 53. The sleeve 52 drives the protective sheet 4 to move, and the sleeve 52 is removed from the mounting cylinder 1. The lens inside the lens barrel 2 is replaced. After that, the operator inserts the sleeve 52 into the mounting cylinder 1. At this time, the locking block 55 is pressed by the sleeve 52 again. When the sleeve 52 moves the locking hole 53 to the position of the locking block 55, the elastic piece 56 rebounds, and the locking block 55 is inserted into the locking hole 53 by the elastic force, completing the lens replacement. The operator puts the sealing ring 63 into the annular groove 61 and makes the bottom of the sealing ring 63 contact the surface of the annular protrusion 62. When the protective piece 4 is attached to the top of the mounting tube 1, the protective piece 4 squeezes the sealing ring 63, so that the sealing ring 63 is compressed between the annular protrusion 62 and the protective piece 4, preventing dust from entering the lens.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small high-definition optical lens, comprising a mounting tube (1), characterized in that: The mounting cylinder (1) is internally threaded with a lens barrel (2), and a protective sheet (4) is attached to the top of the mounting cylinder (1). The small high-definition optical lens also includes: An optical lens mechanism (3) is disposed inside the lens tube (2); The latching mechanism (5) is disposed inside the mounting cylinder (1); A dustproof mechanism (6) is disposed between the mounting cylinder (1) and the protective plate (4); The optical lens mechanism (3) refracts and images external light, the snap-fit ​​mechanism (5) quickly removes the protective sheet (4), and the dustproof mechanism (6) prevents dust from entering the lens.

2. The small high-definition optical lens according to claim 1, characterized in that: The latching mechanism (5) includes: A cavity (51) is formed in the inner wall of the mounting cylinder (1); The sleeve (52) is fixedly connected to the outer wall of the protective plate (4), and its inner wall is attached to the outer wall of the mounting cylinder (1); A grommets (53) are formed on the inner wall of the sleeve (52); The connecting plate (54) is fixedly connected to the outer wall of the mounting cylinder (1) by bolts; The outer wall of the card block (55) is inserted into the inner wall of the card hole (53) and passes through the connecting plate (54), and is movably connected to the connecting plate (54); An elastic sheet (56) is fixedly connected to the inner wall of the cavity (51), and its sidewall is attached to the side of the card block (55) away from the card hole (53); A limiting part (57) is provided on the outside of the card block (55); The sleeve (52) presses the locking block (55) to make the locking block (55) leave the locking hole (53). At this time, the elastic sheet (56) is compressed and the protective sheet (4) is disassembled.

3. A small high-definition optical lens according to claim 2, characterized in that: The limiting part (57) includes: A groove (572) is formed on the inner wall of the mounting cylinder (1); The slider (571) is fixedly connected to the outer wall of the card block (55), and its end is slidably engaged with the inner wall of the groove (572); The slider (571) slides in the groove (572) under the drive of the card block (55).

4. A small high-definition optical lens according to claim 1, characterized in that: The dustproof mechanism (6) includes: An annular groove (61) is formed on the upper part of the outer wall of the mounting cylinder (1); An annular protrusion (62) is fixedly connected to the bottom of the inner wall of the annular groove (61); The sealing ring (63) has its outer wall attached to the top of the annular protrusion (62) and the bottom of the protective plate (4); The sealing performance between the mounting cylinder (1) and the protective plate (4) is improved by the annular groove (61), the annular protrusion (62) and the sealing ring (63).

5. A small high-definition optical lens according to claim 1, characterized in that: The optical lens mechanism (3) includes: An aperture stop (31) is fixedly connected to the top of the lens tube (2); The first lens (32) is disposed inside the lens tube (2) and located below the aperture (31); The second lens (33) is disposed inside the lens tube (2) and located below the first lens (32); The third lens (34) is disposed inside the lens tube (2) and located below the second lens (33); The fourth lens (35) is disposed inside the lens tube (2) and located below the third lens (34); The filter (36) is fixedly connected to the inner wall of the mounting cylinder (1) and is located below the fourth lens (35); The mounting part (37) is disposed on the outer wall of the mounting cylinder (1); The external light is refracted and imaged through the aperture (31), the first lens (32), the second lens (33), the third lens (34), the fourth lens (35) and the filter (36).

6. A small high-definition optical lens according to claim 5, characterized in that: The mounting part (37) includes: Connecting ear (371) is fixedly connected to the lower outer wall of the mounting cylinder (1); A threaded hole (372) is formed on the surface of the connecting lug (371); The lens is installed into the inside of the mobile phone through the connecting ear (371) and the threaded hole (372).

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