JP3062534U - Eyeglass power adjustment sheet - Google Patents

Abstract

(57) [Problem] To provide a spectacle power adjusting sheet capable of easily and partially adjusting the power without replacing a spectacle lens. SOLUTION: The spectacle power adjusting sheet is a power adjusting sheet 1 to be attached to a part of the front surface and / or the back surface of a spectacle lens.
The transparent film base layer 10 having the function of a convex lens or a concave lens and the pressure-sensitive adhesive layer 20 are laminated.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a sheet for adjusting the power of spectacles, and more specifically, by sticking to a part of a spectacle lens, it is possible to create a region different from the refractive index of the lens itself, The present invention relates to a spectacle power adjusting sheet capable of easily obtaining a so-called bifocal effect.

[0002]

[Prior art]

 Conventionally, the refractive index of a lens used for spectacles has been basically constant over the entire lens, and a spectacle user selects, for example, a lens having a power according to his or her own eyesight at the time of purchase ( Get the glasses). Note that there are so-called bifocal glasses and small-lens spectacles in which a convex lens portion for hyperopia is provided in a part of the lens. Adjust the frequency and obtain it.

[0003]

[Problems to be solved by the invention]

 As described above, in the conventional glasses, since the refractive index of the lens itself is constant and cannot be adjusted after acquisition, when the eyesight of the eyeglass user changes after the acquisition of the glasses, the lens itself differs. There was a problem that the lens had to be replaced with a power lens.

[0004] Especially, at the time of transition to so-called presbyopia / myopia, the eyesight of the spectacle user is apt to change and there are individual differences, but the presbyopic person has a plurality of glasses having different powers. There are many. Furthermore, at the time of such a transition, many people use the above-mentioned partial reading glasses for the demand of appearance, etc., but in this case, the convex lens part is provided in a certain area, especially below the center of the lens, so that the document at hand When reading a book, it is necessary to look at it with a lower eye, and if the power of the convex lens portion is not appropriate due to a change in the eyesight of the eyeglass user, there is a problem that the eyeglass user gets tired.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to adjust the power simply and partially without replacing the spectacle lens. An object of the present invention is to provide a spectacle power adjusting sheet that can be used.

[0006]

[Means for Solving the Problems]

 As a result of intensive studies to achieve the above object, the present inventors have found that the above object can be achieved by laminating a sheet having a lens function on a part of the front and / or back surface of the spectacle lens. Heading, the present invention was completed.

That is, the spectacle power adjusting sheet of the present invention is a power adjusting sheet to be attached to a part of the front surface and / or the back surface of the spectacle lens, and includes a transparent film base layer having a convex lens function or a concave lens function. It is characterized by being laminated with an adhesive layer.

Further, a preferred embodiment of the spectacle power adjusting sheet of the present invention is characterized in that the spectacle power can be adjusted by controlling the thickness of the pressure-sensitive adhesive layer.

Further, a preferred form of the spectacle power adjusting sheet of the present invention is rectangular, polygonal, elliptical or circular, and has a minimum width of 5 to 15 mm.

[0010] Further, in a preferred form of the spectacle power adjusting sheet of the present invention, the base material layer is at least one selected from the group consisting of silicone resin, polyethylene terephthalate, polymethyl methacrylate and polycarbonate. It is characterized by being composed of things.

Further, another preferred embodiment of the spectacle power adjusting sheet of the present invention is characterized in that the pressure-sensitive adhesive layer contains a pressure-sensitive adhesive and / or a viscous aqueous solution.

Further, another preferred embodiment of the spectacle power adjusting sheet of the present invention is characterized in that the spectacle power adjusting sheet is attached to a position above or below a substantially center portion of the spectacle lens.

[0013]

[Action]

 In the present invention, a power adjusting sheet was formed by laminating a base layer having a convex lens function or a concave lens function and an adhesive layer. This power adjustment sheet is partially adhered to the front and / or back surface of the spectacle lens to create an area having a power different from that of the lens itself, and to change the power of the lens in the area. Can be.

[0014] Furthermore, the lens function of the above-mentioned power adjusting sheet is changed stepwise, and the obtained plurality of power adjusting sheets are appropriately affixed and arranged on, for example, lenses of myopia glasses or straight glasses. Accordingly, the power of the lens itself can be continuously changed, and a bifocal effect or the like can be provided.

[0015]

[Embodiment of the invention]

 Hereinafter, the spectacle power adjusting sheet of the present invention will be described in detail. As described above, the spectacle power adjusting sheet of the present invention is formed by laminating a transparent film base layer having a convex lens or concave lens function and an adhesive layer.

Here, the material of the base layer is not particularly limited as long as it has transparency and has a function of a convex lens or a concave lens. Silicon resin, polyethylene terephthalate (PET) , Polymethyl methacrylate (PMMA) and polycarbonate (PC). Note that the colorless and transparent substrate layer naturally has transparency, but in the present specification, the colored and transparent substrate layer also has transparency.

The shape of the base material layer can be changed according to a desired convex lens function or concave lens function. Typically, when a convex lens function is provided, as shown in FIG. On the other hand, when a concave lens function is provided, a shape as shown in FIG. 2 can be used. It is preferable that the surface of the base material layer adhered to the spectacle lens is flat.

Next, the material of the pressure-sensitive adhesive layer is not particularly limited as long as it has removable and removable properties and transparency on the lens surface, but natural rubber, synthetic rubber, SBR, A Examples thereof include a pressure-sensitive adhesive and a re-peelable adhesive mainly containing NR, acrylic rubber, silicone rubber, and chloroprene, and a viscous aqueous solution. Further, the material of the lens is usually made of various kinds of glass or synthetic resin, but any adhesive may be used as long as it does not impregnate these materials.

As shown in FIG. 3, the pressure-sensitive adhesive layer 20 is usually laminated on the side of the base material layer 10 having no lens function, typically on the flat surface 10 a side, The power adjustment sheet 1 of the present invention is configured. In the present invention, it is also possible to change the spectacle power by adjusting the thickness of the pressure-sensitive adhesive layer 20.

Next, the shape and dimensions of the power adjusting sheet of the present invention will be described. First, the shape (planar shape) is not particularly limited. However, considering that the human pupil is circular and the visual field is substantially circular, it is most preferable that the shape be circular. It can be rectangular, star-shaped, polygonal, elliptical, etc.

In addition, the size of the power adjustment sheet needs to be smaller than the size of the spectacle lens because the sheet is attached to a part of the spectacle lens, but the size of the human pupil and the size of the visual field are required. In consideration of the minimum width, that is, in the above planar shape, it is preferable that the short piece length is about 5 to 15 mm for a rectangle and about 5 to 15 mm for an ellipse. Further, when the power adjustment sheet is a circle, It is desirable that the diameter is about 5 to 15 mm, and in the case of a square, one side is about 5 to 15 mm.

The spectacle lens to which the power-adjusting sheet of the present invention is to be adhered is any one of a so-called myopic lens (concave lens), a hyperopic lens (convex lens), an astigmatism correcting lens, and a transparent plate for vertical glasses. According to this adjustment sheet, the power (refractive index) of such a lens can be partially changed. In addition, such a lens may be a colorless transparent sunglass lens as well as a colorless transparent lens. In this case, the power adjusting sheet may be a color transparent lens that matches the color of the sunglass lens.

Next, a description will be given of a position at which the above-mentioned power adjustment sheet is attached to the spectacle lens. As described above, the power adjusting sheet of the present invention is adhered and arranged on a part of the spectacle lens. However, as shown in FIG. 4, it is arranged below or above the substantially central portion of the lens 3 in the spectacles 2. Is preferred. Also, as shown, a plurality of sheets may be attached.

When attached below the center of the lens, the function as so-called bifocal glasses or lens glasses with small balls can be exhibited. On the other hand, sticking above the center of the lens is useful for sports, such as billiards, which sometimes look up.

The displacement of the sticking position from the center of the lens can be variously selected depending on the individual difference. However, typically, the distance for hyperopia is 0 to 25 mm downward from the center of the lens. For myopia, the distance is 0 to 25 mm upward from the center of the lens. Further, the power adjustment sheet can be stuck not only on the front surface (opposite side of the eye) of the lens 3 but also on the back surface, and further, it can be stuck on both the front surface and the back surface.

FIG. 5 shows an example of a power adjusting kit using the power adjusting sheet of the present invention, and such a kit is designed for convenience of carrying. In this figure, this adjustment kit has a plurality of power adjustment sheets, and the lens functions of the power adjustment sheets 1, 1 ', 1 ",... Are gradually increased in the order of 1, 1 ', 1 ". Therefore, if the sheets 1, 1 ', etc. having different lens functions are taken out from such a power adjustment kit and a plurality of sheets are attached to a predetermined portion of the lens 3 as described above (see FIG. 4), the lens function Can be changed stepwise, and is suitable for, for example, bifocal glasses.

[0027]

【Example】

 Hereinafter, the present invention will be described in more detail with reference to examples. (Example) An adhesive tape manufactured by 3M was adhered to a transparent film substrate layer made of polycarbonate having a convex lens function to prepare a power adjusting sheet of this example. The frequency adjustment sheet had a circular shape and a diameter of 5 mm. Further, when the power adjusting sheet of this example was attached to the eyeglasses by attaching, the visual field was about 45 °, which was within a range where there was no problem in actual use.

Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to these embodiments, and various modifications can be made within the scope of the disclosure of the present invention. For example, the power adjustment sheet can be applied not only to spectacles but also to various translucent materials, and can be applied to, for example, a loupe.

[0029]

[Effect of the invention]

 As described above, according to the present invention, since a sheet having a lens function is laminated on a part of the front and / or back surface of the spectacle lens, the spectacle lens can be replaced without replacement. It is possible to provide a spectacle power adjustment sheet that can easily and partially adjust the power.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a transparent film base layer according to a power adjustment sheet of the present invention.

FIG. 2 is a cross-sectional view illustrating a transparent film base layer according to the power adjustment sheet of the present invention.

FIG. 3 is a cross-sectional view showing an example of the power adjustment sheet of the present invention.

FIG. 4 is a perspective view showing a sticking position of the frequency adjustment sheet of the present invention.

FIG. 5 is a plan view showing an example of a power adjustment kit using the power adjustment sheet of the present invention.

[Explanation of symbols]

 Reference Signs List 1 frequency adjustment sheet 1 'frequency adjustment sheet 1 "frequency adjustment sheet 2 glasses 3 lens 10 transparent film base layer 10a flat surface 20 adhesive layer

Claims (6)

[Utility model registration claims] 1. A power adjusting sheet to be adhered to a part of the front and / or back surface of a spectacle lens, wherein a transparent film base layer having a convex lens function or a concave lens function and an adhesive layer are laminated. An eyeglass power adjustment sheet characterized by the above-mentioned. 2. The spectacle power can be adjusted by controlling the thickness of the pressure-sensitive adhesive layer.
The eyeglass power adjustment sheet according to the description. 3. A rectangular, polygonal, elliptical or circular shape,
3. The spectacle power adjusting sheet according to claim 1, wherein the minimum width is 5 to 15 mm. 4. The method according to claim 1, wherein the base layer is made of at least one selected from the group consisting of silicone resin, polyethylene terephthalate, polymethyl methacrylate and polycarbonate.
Item 3. The spectacle power adjusting sheet according to any one of the items 3. 5. The spectacle power adjusting sheet according to claim 1, wherein the pressure-sensitive adhesive layer contains a pressure-sensitive adhesive and / or a viscous aqueous solution. 6. The spectacle power adjusting sheet according to claim 1, wherein the spectacle power adjusting sheet is attached to an upper portion or a lower portion of a substantially central portion of the spectacle lens.