Contact lens mold

Abstract

The invention discloses a contact lens mold. Relates to the technical field of contact lenses and comprises a mold body, the mold body is arranged in a step shape, and the bottom of the mold body is arranged to be a convex surface; the bottom of the membrane shell is provided with a radian, the top of the membrane shell is provided with a concave surface, the concave surface is matched with the convex surface, the top of the membrane shell is provided with a ring piece, the inner diameter of the ring piece is larger than that of the top of the membrane shell, and the membrane shell is provided with a bowl part along the downward extending part of the bottom of the ring piece. The mold is simple in structure and convenient to manufacture, the convex surface at the bottom of the mold body is matched with the concave surface at the top of the membrane shell, so that the mold body and the membrane shell can be quickly combined, and the contact lens production efficiency is improved; the mold body is arranged in a step shape, so that the use comfort is improved, and the contact lenses are convenient to separate; according to the contact lens mold, the manufacturing process of the contact lens can be simplified, and the overall manufacturing cost of the contact lens is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of contact lenses, and more particularly to a contact lens mould. Background Art

[0002] Contact lens molds are tools used to make contact lenses. Their main function is to mold liquid lens monomer materials into the desired contact lens shape. Contact lens molds are usually composed of a male mold body and a female mold body. The inner cavity of the female mold body is designed with a specific structure for molding different parts of the contact lens.

[0003] Contact lens molds play a vital role in the production process of contact lenses. It ensures that the shape, size and optical performance of the lens meet the design requirements. Through precise mold design, high-quality contact lenses can be produced to meet different vision correction needs and comfort requirements.

[0004] However, after the contact lens is prepared, it is not easy to separate the contact lens from the membrane shell in the existing contact lens mold; and the existing contact lens mold needs to have the function of replacing different membrane shells for different contact lenses, and its practicality needs to be improved.

[0005] Therefore, how to provide a contact lens mold that is more convenient to separate and more practical for contact lenses is a problem that those skilled in the art need to solve urgently. Summary of the invention

[0006] In view of this, the present invention provides a contact lens mold, aiming to solve one of the problems in the above-mentioned background technology, so as to achieve more convenient separation of contact lenses and better practicality.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A contact lens mold, comprising:

[0009] A mold body, wherein the mold body is arranged in a stepped shape, and the bottom of the mold body is arranged as a convex surface;

[0010] A membrane shell, wherein the bottom of the membrane shell is provided with an arc, the top of the membrane shell is provided with a concave surface, the concave surface is adapted to the convex surface, the top of the membrane shell is provided with a ring piece, the inner diameter of the ring piece is larger than the inner diameter of the top of the membrane shell, and the membrane shell is provided with a bowl portion along the downward extending portion of the bottom of the ring piece.

[0011] Furthermore, a protrusion is arranged between the cylinder at the lowermost end of the mold body and the convex surface, and the inner diameter of the protrusion is larger than the inner diameter of the cylinder at the bottom of the mold body.

[0012] Furthermore, the inner diameter of the inner edge of the ring piece is larger than the inner diameter of the protrusion, and the inner diameter of the inner edge of the ring piece is smaller than the inner diameter of the middle part of the mold body.

[0013] Furthermore, the inner diameters of the stepped portions of the mold body decrease sequentially, and the inner diameter of the top of the mold body is greater than the inner diameter of the bottom.

[0014] Furthermore, the curvature of the arc at both ends of the convex surface is greater than the curvature of the arc at both ends of the concave surface, and the length of both ends of the concave surface is longer than the length of both ends of the convex surface.

[0015] Furthermore, the membrane shell is made of a transparent material, and the mold body located inside the membrane shell can be observed from the outer wall of the membrane shell.

[0016] It can be seen from the above technical scheme that compared with the prior art, the present invention discloses a contact lens mold with a simple structure and easy production. The convex surface at the bottom of the mold body is adapted to the concave surface at the top of the membrane shell so that the mold body and the membrane shell can be quickly combined, thereby improving the production efficiency of contact lenses; the mold body is arranged in a stepped shape to improve the comfort of use and facilitate the separation of contact lenses; the liquid enters the membrane shell and is pressed into shape by the mold body. Different molds can be replaced to make different contact lenses. Compared with the prior art, the prepared contact lenses have different edge heights. The contact lens mold of the present invention can simplify the production process of the contact lenses and reduce the overall manufacturing cost of the contact lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a contact lens mold provided by the present invention;

[0019] Figure 2 A schematic diagram of the internal structure of the contact lens mold provided by the present invention;

[0020] Figure 3 A side view of the internal structure of the contact lens mold provided by the present invention;

[0021] Figure 4 A side view of a contact lens mold provided by the present invention;

[0022] Figure 5 for Figure 4 Cross-section view at AA in the middle.

[0023] Among them: 1 is the mold body; 2 is the convex surface; 3 is the membrane shell; 4 is the arc; 5 is the concave surface; 6 is the ring piece; 7 is the bowl part; 8 is the cylinder; 9 is the protrusion. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-5 The embodiment of the present invention discloses a contact lens mold, comprising:

[0026] The mold body 1 is arranged in a stepped shape, and the bottom of the mold body 1 is arranged as a convex surface 2; the mold body 1 is arranged in a stepped shape to improve the comfort of use and facilitate the separation of the contact lens;

[0027] A membrane shell 3 is provided with a curvature 4 at the bottom of the membrane shell 3, a concave surface 5 is provided at the top of the membrane shell 3, the concave surface 5 is matched with the convex surface 2, a ring piece 6 is provided at the top of the membrane shell 3, the inner diameter of the ring piece 6 is larger than the inner diameter of the top of the membrane shell 3, and a bowl portion is provided at the portion of the membrane shell 3 extending downward along the bottom of the ring piece 6; the concave surface 5 is matched with the convex surface 2 so that the mold body 1 and the membrane shell 3 can be quickly combined, and the liquid enters the membrane shell 3 and is pressed and formed by the convex surface 2 of the mold body 1, thereby improving the production efficiency of contact lenses.

[0028] In this embodiment, a protrusion 9 is arranged between the cylinder 8 at the lower end of the mold body 1 and the convex surface 2, and the inner diameter of the protrusion 9 is larger than the inner diameter of the cylinder 8 at the bottom of the mold body 1; the protrusion 9 makes the edge height of the contact lens different from that of the prior art.

[0029] In this embodiment, the inner diameter of the inner edge of the ring piece 6 is larger than the inner diameter of the protrusion 9, and the inner diameter of the inner edge of the ring piece 6 is smaller than the inner diameter of the middle part of the mold body 1; the mold body 1 is limited, and when the mold body 1 moves downward in the membrane shell 3, there is a gap between the convex surface 2 and the concave surface 5, thereby realizing the preparation of contact lenses.

[0030] In this embodiment, the inner diameter of the stepped portion of the mold body 1 decreases successively, and the inner diameter of the top of the mold body 1 is larger than the inner diameter of the bottom; preferably, the mold body 1 is composed of a plurality of cylinders 8 and convex surfaces 2 of different sizes spliced ​​in sequence, which facilitates the separation of contact lenses and improves the production efficiency of contact lenses.

[0031] In this embodiment, the curvature of the arc 4 at both ends of the convex surface 2 is greater than the curvature of the arc 4 at both ends of the concave surface 5 , and the length of both ends of the concave surface 5 is longer than the length of both ends of the convex surface 2 .

[0032] In this embodiment, the membrane shell 3 is made of a transparent material, and the mold body 1 located inside the membrane shell 3 can be observed from the outer wall of the membrane shell 3, which facilitates observation of the prepared contact lens.

[0033] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0034] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A contact lens mold, characterized in that: include: A mold body, wherein the mold body is arranged in a stepped shape, and the bottom of the mold body is arranged as a convex surface; A membrane shell, wherein the bottom of the membrane shell is provided with an arc, the top of the membrane shell is provided with a concave surface, the concave surface is adapted to the convex surface, the top of the membrane shell is provided with a ring piece, the inner diameter of the ring piece is larger than the inner diameter of the top of the membrane shell, and the membrane shell is provided with a bowl portion along the downward extending portion of the bottom of the ring piece.

2. A contact lens mold according to claim 1, characterized in that: A protrusion is arranged between the cylinder at the lowermost end of the mold body and the convex surface, and the inner diameter of the protrusion is larger than the inner diameter of the cylinder at the bottom of the mold body.

3. A contact lens mold according to claim 2, characterized in that: The inner diameter of the inner edge of the ring piece is larger than the inner diameter of the protrusion, and the inner diameter of the inner edge of the ring piece is smaller than the inner diameter of the middle part of the mold body.

4. A contact lens mold according to claim 1, characterized in that: The inner diameters of the stepped portions of the mold body decrease sequentially, and the inner diameter of the top of the mold body is greater than the inner diameter of the bottom.

5. A contact lens mold according to claim 1, characterized in that: The curvature of the arc at both ends of the convex surface is greater than the curvature of the arc at both ends of the concave surface, and the length of both ends of the concave surface is longer than the length of both ends of the convex surface.

6. A contact lens mold according to claim 1, characterized in that: The membrane shell is made of a transparent material, and the mold body located inside the membrane shell is observed from the outer wall of the membrane shell.

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