Multi-point out-of-focus lens based on annular distribution

Abstract

The utility model discloses a multipoint out-of-focus lens based on annular distribution, which relates to the technical field of out-of-focus lenses and comprises a lens frame, and a multipoint out-of-focus lens body is arranged in the lens frame. According to the multi-point out-of-focus lens disclosed by the utility model, the lenses can be limited through the limiting assemblies, so that the lenses are limited in the lens frame, and when the lenses are mounted, the metal elastic strips can be extruded through the lenses, so that the metal elastic strips are stressed and deformed, and the lenses are directly mounted in the lens frame; when the multi-point out-of-focus lens body is installed, the metal elastic strip can automatically reset and restore to the initial state, the metal elastic strip and the multi-point out-of-focus lens body are attached to each other, the multi-point out-of-focus lens body is limited in the lens frame, installation of the multi-point out-of-focus lens body is facilitated, and meanwhile under the elasticity of the metal elastic strip, the multi-point out-of-focus lens body can be installed conveniently. The multi-point out-of-focus lens can avoid abrasion between the multi-point out-of-focus lens body and the lens frame, and is simple to operate and quick to mount.

Description

Technical Field

[0001] The utility model relates to the technical field of defocus lenses, in particular to a multi-point defocus lens based on annular distribution. Background Art

[0002] Most adolescent myopia is axial myopia, which means that myopia is mainly caused by the elongation of the eye axis. However, the eyeball itself is not a perfect sphere, but an ellipsoid, and the higher the degree of myopia, the more the eyeball is ellipsoidal. Currently, one of the clinically proven effective means to control the progression of myopia is to control the growth of the eye axis through defocus, thereby delaying the progression of myopia.

[0003] The so-called defocus is a deviation from the focus, which means that the image that should be focused on the retina is not focused on the retina, but is focused in front of or behind the retina. Focusing behind the retina is called hyperopic defocus, and focusing in front of the retina is called myopic defocus. Hyperopic defocus can easily induce compensatory growth of the eye axis, thereby leading to the increase of myopia. Defocus lenses change the hyperopic defocus that occurs in the periphery of ordinary myopia lenses, that is, the peripheral focus falls behind the retina, into myopic defocus, that is, the peripheral focus falls in front of the retina, thereby inhibiting the growth of the eye axis and effectively slowing down and or controlling the deepening of myopia.

[0004] The existing defocused lenses are installed on the frames by clamping. Since the mounting groove of the frames is small and the defocused lenses are thin and hard, they are not convenient to install. During the installation process, the lenses and the frames are easily worn. At the same time, after long-term use of the defocused lenses, dust will appear between the defocused lenses and the frames, which is not easy to clean.

[0005] Therefore, it is necessary to invent a multi-point defocus lens based on annular distribution to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a multi-point defocus lens based on annular distribution to solve the above-mentioned problems.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-point defocus lens based on annular distribution, comprising a lens frame, wherein a multi-point defocus lens body is arranged inside the lens frame;

[0008] A plurality of slots are provided on one side of the frame, and a limit assembly is arranged inside the plurality of slots, the limit assembly comprises a metal spring bar, the metal spring bar is fixedly connected in the slot, a moving assembly is arranged inside the metal spring bar, the moving assembly comprises a moving column, one end of the moving column is fixedly connected to the metal spring bar, a fixed column is fixedly connected inside the metal spring bar, the moving column penetrates the metal spring bar and the fixed column, and extends to the other side of the metal spring bar where a moving plate is fixedly connected, the moving plate is slidably connected in the slot, a spring is sleeved on the outer ring of the moving column, and both ends of the spring are respectively fixedly connected to the metal spring bar and the fixed column.

[0009] Preferably, a hollow light area is provided inside the multi-point defocus lens body, and the hollow light area is located at the center of the multi-point defocus lens body. Defocus ring bands are provided around the hollow light area, a defocus unit is provided inside the defocus ring bands, and anti-reflection layers are provided on both sides of the defocus ring bands.

[0010] Preferably, a protective film is fixedly connected to one side of the multi-point defocus lens body, and the multi-point defocus lens body and the protective film have the same shape.

[0011] Preferably, the metal spring strip is in a right-angle trapezoidal shape.

[0012] Preferably, the movable plate is rectangular, and the top of the movable plate extends out of the upper surface of the mirror frame.

[0013] Preferably, one corner of the mirror frame is arc-shaped.

[0014] Preferably, the defocusing units are distributed in a ring array.

[0015] Technical effects and advantages of the utility model:

[0016] 1. The utility model is provided with a limiting component, through which the multi-point defocus lens body can be limited, so that the multi-point defocus lens body is restricted in the frame. When the multi-point defocus lens body is being installed, the metal spring bar can be squeezed by the multi-point defocus lens body to deform the metal spring bar under force, and the multi-point defocus lens body can be directly installed in the frame. After the multi-point defocus lens body is installed, the metal spring bar will automatically reset to its initial state, and the metal spring bar and the multi-point defocus lens body will fit each other, so that the multi-point defocus lens body is restricted in the frame, which facilitates the installation of the multi-point defocus lens body. At the same time, due to the elasticity of the metal spring bar, wear between the multi-point defocus lens body and the frame can be avoided. The operation is simple and the installation is quick.

[0017] 2. Furthermore, considering that dust will appear at the position between the multi-point defocus lens body and the frame after long-term use, a moving component is provided. The moving component can release the restriction of the metal spring bar on the multi-point defocus lens body, and the multi-point defocus lens body can be taken out of the frame, and the multi-point defocus lens body and the frame can be separated from each other, so as to facilitate the cleaning of dust at the position between the multi-point defocus lens body and the frame. The metal spring bar is driven to move by the moving plate, so that the metal spring bar is deformed by force, and then the multi-point defocus lens body is taken out of the frame. The multi-point defocus lens body can be disassembled and installed at the same time by moving the moving plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the multi-point defocus lens of the utility model.

[0019] Figure 2 This is a half-section diagram of the multi-point defocusing lens of the utility model.

[0020] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle.

[0021] Figure 4 The figure is a schematic diagram of the internal structure of the multi-point defocus lens of the utility model.

[0022] In the figure: 1. Frame; 2. Multi-point defocus lens body; 3. Protective film; 4. Notch; 5. Metal spring strip; 6. Moving column; 7. Fixed column; 8. Spring; 9. Moving plate; 10. Anti-reflection layer; 11. Hollow light area; 12. Defocus ring; 13. Defocus unit. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides Figure 1-Figure 4 As shown, a multi-point defocus lens based on annular distribution includes a frame 1, one corner of the frame 1 is arc-shaped, and a multi-point defocus lens body 2 is arranged inside the frame 1;

[0025] A protective film 3 is fixedly connected to one side of the multi-point defocus lens body 2 . The multi-point defocus lens body 2 and the protective film 3 have the same shape. The protective film 3 protects the multi-point defocus lens body 2 .

[0026] A hollow light area 11 is arranged inside the multi-point defocus lens body 2, and the hollow light area 11 is located at the center of the multi-point defocus lens body 2. Defocus ring belts 12 are arranged around the hollow light area 11, and defocus units 13 are arranged inside the defocus ring belts 12. The defocus units 13 are distributed in a ring array, and anti-reflection layers 10 are arranged on both sides of the defocus ring belts 12.

[0027] The multi-point defocus lens body 2 is formed by curing a resin monomer and has an optical refractive index to meet the needs of myopia.

[0028] The hollow light area 11 has a refractive power consistent with the user's myopia degree to ensure that the object image falls on the retina of the user using the myopic defocus lens, thereby solving the problem that myopic patients cannot see distant objects clearly due to myopia.

[0029] The defocus ring 12 is concave in the upper and lower parts and extends to the left and right sides of the multi-point defocus lens body 2. The defocus ring 12 has a variable defocus amount, which can make the image of the object fall on the retina or in front of the retina, thereby avoiding the growth of the eye axis, delaying or controlling the deepening of myopia, and making it more comfortable to wear.

[0030] Considering that the lens cannot protect against ultraviolet rays, which can cause damage to the eyes, an ultraviolet absorbing layer is provided in the anti-reflection layer 10. The ultraviolet absorbing layer is made by adding an ultraviolet absorber and has the function of absorbing ultraviolet rays.

[0031] A plurality of slots 4 are provided on one side of the frame 1, and a limit assembly is arranged inside the plurality of slots 4. The limit assembly includes a metal spring bar 5, which is in a right-angled trapezoid and fixedly connected in the slot 4. A moving assembly is arranged inside the metal spring bar 5, and the moving assembly includes a moving column 6, one end of the moving column 6 is fixedly connected to the metal spring bar 5, and a fixed column 7 is fixedly connected inside the metal spring bar 5. The moving column 6 runs through the metal spring bar 5 and the fixed column 7, and extends to the other side of the metal spring bar 5 and is fixedly connected with a moving plate 9. The moving plate 9 is rectangular, and the top of the moving plate 9 extends out of the upper surface of the frame 1, and can be hand-held and pulled by the user. The moving plate 9 is slidably connected in the slot 4, and a spring 8 is sleeved on the outer ring of the moving column 6, and the two ends of the spring 8 are respectively fixedly connected to the metal spring bar 5 and the fixed column 7.

[0032] The metal spring bar 5 is elastic. One end of the metal spring bar 5 is bent when subjected to force. After the force is removed, the metal spring bar 5 is reset.

[0033] The utility model is provided with a limiting component, through which the multi-point defocus lens body 2 can be limited, so that the multi-point defocus lens body 2 is restricted in the frame 1. When the multi-point defocus lens body 2 is being installed, the metal elastic strip 5 can be squeezed by the multi-point defocus lens body 2, so that the metal elastic strip 5 is deformed by force, and the multi-point defocus lens body 2 is directly installed in the frame 1. After the multi-point defocus lens body 2 is installed, the metal elastic strip 5 will automatically reset to its initial state. The metal elastic strip 5 and the multi-point defocus lens body 2 are fitted together, and the multi-point defocus lens body 2 is restricted in the frame 1, which facilitates the installation of the multi-point defocus lens body 2. At the same time, due to the elasticity of the metal elastic strip 5, wear between the multi-point defocus lens body 2 and the frame 1 can be avoided. The operation is simple and the installation is quick.

[0034] Furthermore, considering that dust will appear at the position between the multi-point defocus lens body 2 and the frame 1 after long-term use, a moving component is provided, through which the restriction of the metal spring bar 5 on the multi-point defocus lens body 2 can be released, the multi-point defocus lens body 2 can be taken out of the frame 1, and the multi-point defocus lens body 2 and the frame 1 can be separated from each other, so as to facilitate the cleaning of dust at the position between the multi-point defocus lens body 2 and the frame 1, and the metal spring bar 5 can be moved by the moving plate 9 to deform the metal spring bar 5 under force, and then the multi-point defocus lens body 2 can be taken out of the frame 1, and the multi-point defocus lens body 2 can be disassembled and installed by moving the moving plate 9.

[0035] Furthermore, the restriction of the metal spring strip 5 on the multi-point defocus lens body 2 can be released through the moving component. Specifically, the moving plate 9 is held by hand first. When subjected to force, the moving plate 9 moves under the force, the moving column 6 moves with the moving plate 9, and the metal spring strip 5 is deformed under the force following the direction of the moving column 6.

Claims

1. A multi-point defocus lens based on annular distribution, comprising a lens frame (1), characterized in that: A multi-point defocused lens body (2) is arranged inside the lens frame (1); A plurality of slots (4) are provided on one side of the mirror frame (1), and a limit assembly is arranged inside the plurality of slots (4). The limit assembly comprises a metal spring bar (5), and the metal spring bar (5) is fixedly connected in the slot (4). A moving assembly is arranged inside the metal spring bar (5), and the moving assembly comprises a moving column (6), and one end of the moving column (6) is fixedly connected to the metal spring bar (5), and a fixed column (7) is fixedly connected inside the metal spring bar (5). The moving column (6) passes through the metal spring bar (5) and the fixed column (7), and extends to the other side of the metal spring bar (5) and is fixedly connected to a moving plate (9), and the moving plate (9) is slidably connected in the slot (4). A spring (8) is sleeved on the outer ring of the moving column (6), and the two ends of the spring (8) are respectively fixedly connected to the metal spring bar (5) and the fixed column (7).

2. The multi-point defocus lens based on annular distribution according to claim 1, characterized in that: A hollow light area (11) is arranged inside the multi-point defocus lens body (2), the hollow light area (11) is located at the center of the multi-point defocus lens body (2), defocus ring belts (12) are arranged around the hollow light area (11), a defocus unit (13) is arranged inside the defocus ring belt (12), and anti-reflection layers (10) are arranged on both sides of the defocus ring belt (12).

3. The multi-point defocus lens based on annular distribution according to claim 1, characterized in that: A protective film (3) is fixedly connected to one side of the multi-point defocus type lens body (2); the multi-point defocus type lens body (2) and the protective film (3) have the same shape.

4. The multi-point defocus lens based on annular distribution according to claim 1, characterized in that: The metal spring strip (5) is in the shape of a right-angled trapezoid.

5. The multi-point defocus lens based on annular distribution according to claim 1, characterized in that: The movable plate (9) is rectangular, and the top of the movable plate (9) extends out of the upper surface of the mirror frame (1).

6. The multi-point defocus lens based on annular distribution according to claim 1, characterized in that: One corner of the mirror frame (1) is arc-shaped.

7. The multi-point defocus lens based on annular distribution according to claim 2, characterized in that: The defocusing units (13) are distributed in a ring array.

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