Unstressed out-of-focus myopic lens and mold

Abstract

The utility model discloses a stress-free out-of-focus myopia lens and a mold, which can forcibly correct the eye using habit of a user, improve the myopia prevention and control and myopia correction effects of myopia glasses and eliminate the stress during production. The unstressed out-of-focus myopic lens comprises a circular transparent lens. A plurality of circles of annular structures are sequentially arranged in an outward radiation manner by taking the circle center of the transparent lens as a starting point; each circle of annular structure is composed of different numbers of spherical protrusions, and the adjacent spherical protrusions in each circle of annular structure are adjacent to each other without gaps. The die is used for producing the stress-free out-of-focus myopia lens and comprises a forming die base, a lower die base and an upper die base. The forming die holder is provided with a die cavity with an upward opening; the lower die holder is matched in the die cavity in a dynamic sealing manner; the upper surface of the lower die holder is matched with the transparent lens in shape; the die cavity is provided with a circle of overflow groove around the lower die holder; and the upper die holder is matched above the opening of the die cavity in a lifting manner, and is assembled with the lower die holder when entering the die cavity so as to form the transparent lens.

Description

Technical Field

[0001] This utility model belongs to the field of lens technology, and specifically refers to a stress-free defocus myopia lens and mold. Background Technology

[0002] Nearsightedness is a condition where the eye cannot see distant objects clearly, but can see nearby objects clearly. This is usually caused by an excessively long eyeball or an overly strong refractive power of the cornea and lens, causing light from distant objects to focus in front of the retina, creating a blurry image. Nearsightedness can be corrected by wearing glasses, contact lenses, or undergoing laser surgery.

[0003] Typically, people wear glasses to control and correct nearsightedness after it develops, but this often only slows down the increase in prescription. This is because people generally perceive glasses as merely an aid to vision, helping them see distant objects clearly. Therefore, they don't subconsciously change their eye habits, resulting in poor treatment outcomes. Thus, lenses need to be specially designed to change users' eye habits.

[0004] Meanwhile, most prescription lenses currently on the market are plastic lenses, produced through injection molding. During injection molding, hot material enters the mold and rapidly cools and plasticizes upon contact with the cooler, while subsequent hot material continues to be injected, creating shear stress between the materials. Furthermore, the high injection pressure causes inconsistent molecular orientation during plasticization, resulting in significant internal stress within the product. Excessive stress in the lens can have long-term effects on the structure and function of the eye, altering its refractive state and further impacting vision. To eliminate internal stress, a stress-relief process is usually required after injection molding. This results in a long processing cycle, complex manufacturing process, and low efficiency for existing plastic lenses. Utility Model Content

[0005] The main purpose of this utility model is to provide a stress-free defocus myopia lens and mold, which solves the problems existing in the prior art, can forcibly correct the user's eye habits, improve the effect of myopia prevention and correction of myopia glasses, and can eliminate stress during production.

[0006] To achieve the above objectives, one of the solutions of this utility model is:

[0007] A stress-free defocus myopia lens includes a circular transparent lens; a number of ring-shaped structures are arranged radially outward from the center of the transparent lens; each ring-shaped structure is composed of a different number of spherical protrusions, and adjacent spherical protrusions in each ring-shaped structure are adjacent without gaps.

[0008] The diameter of the spherical protrusion is 1.2 mm.

[0009] The ring structure is designed with eleven rings in total.

[0010] Preferably, the diameters of the annular structure from the inside out are 10.12mm, 14.94mm, 19.76mm, 24.58mm, 29.4mm, 34.22mm, 39.04mm, 43.86mm, 48.68mm, 53.5mm, and 58.32mm.

[0011] One of the solutions of this utility model is:

[0012] A mold for producing the aforementioned stress-free defocus myopia lens includes a molding mold base, a lower mold base, and an upper mold base; the molding mold base is provided with an upward-opening mold cavity; the lower mold base is dynamically and sealingly fitted within the mold cavity, and its upper surface matches the shape of the transparent lens; the mold cavity is provided with an overflow groove around the lower mold base; the upper mold base is raised and lowered above the opening of the mold cavity, and closes with the lower mold base when entering the mold cavity to form the transparent lens.

[0013] The mold also includes a first cylinder and a second cylinder, which are respectively connected to the lower mold base and the upper mold base for transmission. The first cylinder is used to drive the lower mold base to perform lifting and lowering relative to the mold cavity. The second cylinder is used to drive the lower mold base to perform lifting and lowering relative to the mold cavity so as to close or release the mold with the lower mold base.

[0014] Preferably, a roller is provided at the bottom of the body of the first cylinder.

[0015] After adopting the above technical solution, the present invention has the following technical effects:

[0016] This invention utilizes dot diffusion technology to specifically design the visible area on the lens. The area within the innermost ring structure of the lens is the user's visible area. When the user's eyes focus on this area, they will not be affected by the spherical protrusions and can see normally. The area outside the visible area is covered with spherical protrusions, which can affect the user's vision. When the user's eyes focus on this area, their vision will be obstructed, causing inconvenience and accelerating visual fatigue. The user will then have to focus their eyes on the aforementioned visible area. Therefore, this design can forcibly change the user's eye habits, keeping their eyes focused on the same position, thereby achieving the effect of myopia prevention and correction. The adjacent spherical protrusions within each ring structure are adjacent, making the arrangement of the spherical protrusions more compact and numerous, resulting in a better obstruction of vision. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the lens structure according to a specific embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the mold structure according to a specific embodiment of the present utility model;

[0019] Explanation of icon numbers:

[0020] 1-Transparent lens; 2-Spherical protrusion; 3-Mold base; 31-Mold cavity; 32-Overflow groove; 4-Lower mold base; 5-Upper mold base; 6-First cylinder; 7-Second cylinder; 8-Roller. Detailed Implementation

[0021] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0022] refer to Figure 1 As shown, this utility model discloses a stress-free defocus myopia lens, including a circular transparent lens 1; a number of ring-shaped structures are arranged radially outward from the center of the transparent lens 1; each ring-shaped structure is composed of a different number of spherical protrusions 2, and adjacent spherical protrusions 2 in each ring-shaped structure are adjacent without gaps.

[0023] Through the above-described scheme, this utility model utilizes dot diffusion technology to specifically design the visible area on the lens. The area within the innermost ring structure of the lens is the user's visible area. When the user's eyes focus on this area, they will not be affected by the spherical protrusions 2 and can see normally. The area outside the visible area is covered with spherical protrusions 2, which can affect the user's vision. When the user's eyes focus on this area, they will experience inconvenience due to the obstructed vision, which will accelerate visual fatigue and force them to focus their eyes on the aforementioned visible area. Therefore, this design can forcibly change the user's eye habits, keeping their eyes focused on the same position, thereby achieving the effect of myopia prevention and correction. The adjacent spherical protrusions 2 within each ring structure are adjacent, making the arrangement of the spherical protrusions 2 more compact and numerous, resulting in a better obstruction of vision.

[0024] The following shows a specific implementation of the above-mentioned stress-free defocus myopia lens.

[0025] The diameter of the aforementioned spherical protrusion 2 is 1.2 mm.

[0026] The aforementioned ring structure consists of eleven rings.

[0027] Furthermore, the diameters of the aforementioned annular structures, from the inside out, are 10.12 mm, 14.94 mm, 19.76 mm, 24.58 mm, 29.4 mm, 34.22 mm, 39.04 mm, 43.86 mm, 48.68 mm, 53.5 mm, and 58.32 mm, respectively.

[0028] refer to Figure 2 As shown, this utility model also discloses a mold for producing the above-mentioned stress-free defocus myopia lens, including a molding mold base 3, a lower mold base 4 and an upper mold base 5;

[0029] The forming mold base 3 is provided with an upward-opening mold cavity 31;

[0030] The lower mold base 4 is dynamically sealed and fitted inside the mold cavity 31, and its upper surface matches the shape of the transparent lens 1; the mold cavity 31 is provided with an overflow groove 32 around the lower mold base 4;

[0031] The upper mold base 5 is raised and lowered above the opening of the mold cavity 31, and closes with the lower mold base 4 when entering the mold cavity 31 to form the transparent lens 1.

[0032] Through the above solution, the present invention can inject hot material into the mold cavity 31 in one go, and then directly close the upper mold base 5 and the lower mold base 4. Excess material will be squeezed out to overflow groove 32, thereby changing the details of the injection molding process and reducing stress generation.

[0033] The following shows a specific embodiment of the above-mentioned mold.

[0034] The aforementioned mold also includes a first cylinder 6 and a second cylinder 7, which are respectively connected to the lower mold base 4 and the upper mold base 5 for transmission. The first cylinder 6 is used to drive the lower mold base 4 to move up and down relative to the mold cavity 31, so that the lens can be pushed out of the mold cavity 31 after the lens is formed, making it convenient to transfer to the subsequent process. The second cylinder 7 is used to drive the lower mold base 5 to move up and down relative to the mold cavity 31 so as to close or release the mold with the lower mold base 4.

[0035] Furthermore, the bottom of the body of the first cylinder 6 is provided with rollers 8 to facilitate the transfer of the entire mold to the next process.

[0036] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A stress-free defocus myopia lens, characterized in that: It includes a circular transparent lens; starting from the center of the transparent lens, several ring-shaped structures are arranged radially outward; each ring-shaped structure is composed of a different number of spherical protrusions, and adjacent spherical protrusions in each ring-shaped structure are adjacent to each other without gaps.

2. The stress-free defocus myopia lens as described in claim 1, characterized in that: The diameter of the spherical protrusion is 1.2 mm.

3. The stress-free defocus myopia lens as described in claim 1, characterized in that: The ring structure is designed with eleven rings in total.

4. The stress-free defocus myopia lens as described in claim 3, characterized in that: The diameters of the ring structure from the inside out are 10.12mm, 14.94mm, 19.76mm, 24.58mm, 29.4mm, 34.22mm, 39.04mm, 43.86mm, 48.68mm, 53.5mm, and 58.32mm.

5. A mold for producing stress-free defocused myopia lenses as described in any one of claims 1 to 4, characterized in that: Includes a forming mold base, a lower mold base, and an upper mold base; The molding die base is provided with an upward-opening mold cavity; The lower mold base is dynamically sealed and fitted into the mold cavity, and its upper surface matches the shape of the transparent lens; the mold cavity is provided with an overflow groove around the lower mold base; The upper mold base is raised and lowered above the opening of the mold cavity, and closes with the lower mold base when entering the mold cavity to form the transparent lens.

6. The mold as described in claim 5, characterized in that: The mold also includes a first cylinder and a second cylinder, which are respectively connected to the lower mold base and the upper mold base for transmission. The first cylinder is used to drive the lower mold base to perform lifting and lowering relative to the mold cavity. The second cylinder is used to drive the lower mold base to perform lifting and lowering relative to the mold cavity so as to close or release the mold with the lower mold base.

7. The mold as described in claim 6, characterized in that: The bottom of the body of the first cylinder is equipped with rollers.

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