JP2010110451A - Artificial fingernail and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an artificial fingernail which has not only fitting property in wearing the fingernail but also a natural appearance suited to an individual fingernail unlike a conventional artificial fingernail having a uniform and unnatural shape, and to provide a method for manufacturing such an artificial fingernail by simple operation in a short period of time without putting a user under of a physical and economical burden. <P>SOLUTION: The artificial fingernail has a multilayer structure including an outer layer having a shape of a fingernail and an inner layer located under the outer layer and attached directly or indirectly to the outer layer. In collaboration between the outer layer and the inner layer, a cross-section perpendicular to the longitudinal axis of the artificial fingernail is formed into a desired curved shape as a whole. A thin piece for forming the outer layer having the shape of the artificial fingernail and a thin piece for forming the inner layer having a shape of overlapping with the lower surface of the thin piece for forming the outer layer from below are provided. The thin piece for forming the inner layer is attached directly or indirectly to the lower-side surface of the thin piece for forming the outer layer while the thin piece for forming the inner layer is deviated in the transverse direction of the longitudinal axis of the artificial fingernail. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an artificial nail. More specifically, the present invention relates to an artificial nail having a multilayer structure including an outer layer having a nail shape and an inner layer positioned below and attached to the outer layer directly or in an articulated manner. The artificial nail is characterized in that the cross section perpendicular to the longitudinal central axis of the artificial nail is formed into a desired curved shape as a whole in cooperation with the inner layer. The artificial nail of the present invention has a very high degree of freedom in the shape of the cross section perpendicular to the central axis in the longitudinal direction over its entire length, so that not only the fitting property when attached to the nail is improved, but also the uniform Unlike a conventional artificial nail having an unnatural shape, a natural appearance adapted to each nail can be exhibited. The present invention also relates to a method for producing the above-described excellent artificial nail by a simple operation in a short time without putting a physical and economical burden on the user. Furthermore, this invention relates also to the kit for artificial nail manufacture which can be used when manufacturing an artificial nail by said method.

  Artificial nails have been used for many years to make nails look long and beautiful and for the purpose of reinforcing the nails. Conventionally, as a method for forming and mounting an artificial nail, a resin molded body having a nail shape (so-called “nail”), commonly referred to as a “nail chip”, is formed using a double-sided tape or a nail adhesive. There are generally known a method of attaching to the surface of the skin and a method called “sculpture” in which an artificial nail is directly formed on the own nail using an acrylic resin or the like.

  The nail chip is formed by molding a resin such as an acrylic resin, a urethane resin, or an ABS resin into a nail shape, and nail chips having various shapes and sizes are commercially available.

  Manufacturers and distributors of such nail chips have had to prepare nail chips having various sizes, curves, and shapes in advance. This is because the size, curvature, and shape of the nail tip user's own nails vary from person to person, so it is necessary to prepare many types of nail tips to adapt to the shape of the nails of each person. is there. In addition, many types of nail tips are commercially available. However, when a commercially available nail tip is attached, it is actually very difficult to obtain a perfect fit. If you use a nail tip that does not fit in your nail, the nail tip will be tightened by the elasticity of the nail tip itself, or it may bite into your finger, causing pain to the nail tip user and hindering the use of the nail tip End up. Further, usually, if the nail tip is not completely fitted to the nail, there is a problem that sufficient adhesive force cannot be obtained and the nail tip is easily peeled off.

  Furthermore, the conventional nail tip is generally manufactured by injection molding or the like, and has a symmetrical curved shape when viewed from the tip. However, natural nails often have an asymmetrical shape when viewed from a fingertip having a nail, and the shape varies depending on the type of finger and the individual. Therefore, when a conventional nail tip is attached, there is a problem that the symmetrical shape of the nail tip gives an unnatural impression.

  Various proposals have been made to solve the above problems. For example, Japanese Patent Publication No. 7-7352 (Patent Document 1) prepares a plaster model of each fingertip portion and provides an extension base having a desired length, shape, and curvature with wax at the tip portion. As a master model, take the impression of the master model, make a plaster model of the impression surface and make a double model, form an artificial nail model of the desired shape on the nail part of the double model, take the impression type, Disclosed is a method for producing an artificial nail characterized by forming an artificial nail using a curable resin composition between the impression mold and a multiple model excluding the artificial nail model, and then finishing the artificial nail. Yes. However, this method has a drawback that it is very complicated, requires a high level of technology, and is expensive.

  US Pat. No. 5,676,165 (Patent Document 2) discloses a nail chip having an X-shaped notch in a portion corresponding to the base of a nail. This notch is provided to improve the strength of the nail tip and to facilitate fitting to the nail. However, such a nail chip not only complicates the manufacturing process, but it is very difficult to make this notch inconspicuous after being mounted on the own nail, and it has excellent fashionability and design. Hard to get. There is no description of any means for giving natural curvature to the artificial nail.

  In Japanese Patent Laid-Open No. 2002-238665 (Patent Document 3), a nail chip is manufactured using a resin having a glass transition temperature of 40 to 90 ° C., and the obtained nail chip is pressed against the nail. A technique for giving a nail tip a curvature suitable for its own nail by heating with a dryer or the like is disclosed. However, in this technique, since it is necessary to heat the nail tip in a state where it is pressed against its own nail, there is a risk of burns and the like, which is not practical.

  Japanese Laid-Open Patent Publication No. 2004-254877 (Patent Document 4) discloses a method of manufacturing a nail chip using a plate-like photocurable resin. More specifically, in the method disclosed in Patent Document 4, a plate for creating a nail chip made of a photo-curing resin in a flexible state before being completely cured is placed on the nail, and the plate is placed on the nail. A method of obtaining a nail tip by curving to match the shape of the film, curing the photocurable resin by irradiating with light, and adjusting the curved plate into a nail shape is disclosed. However, Patent Document 4 has no specific description regarding a method for producing a plate made of a photocurable resin in a flexible state before being cured. It is difficult to obtain a plate having flexibility suitable for the purpose of the above publication by appropriately adjusting the degree of curing of the photocurable resin, and to maintain the flexibility until the start of actual nail chip creation. It is. Therefore, the method described in this document is not realistic.

  Japanese Patent Application Laid-Open Publication No. 2004-275736 (Patent Document 5) is an artificial nail composed of an upper layer and a lower layer, and the lower layer is made of an elastic polymer such as silicone rubber, thereby improving the compatibility with the nail. An artificial nail is disclosed. However, since the upper layer is manufactured by a method similar to that for conventional artificial nails, the overall appearance is unnatural.

  Japanese Patent Application Laid-Open No. 2007-19569 (Patent Document 6) describes a method of reinforcing a back surface of a tip end portion of a chip protruding from the nail after the back surface of a chip made of a substantially rectangular thin acrylic plate is bonded to the nail. A technique for applying material to give thickness and strength is disclosed. In this technique, since the portion that directly contacts the nail is a thin acrylic plate, it is highly compatible with the nail, but no means for adjusting the shape of the tip portion is disclosed. In addition, for example, even if an attempt is made to maintain the tip portion in a desired shape using a curable acrylic resin or the like, it is difficult to maintain the desired shape until it hardens after application of the resin. The burden on human beings increases.

  Japanese Unexamined Patent Publication No. 2008-509796 (Patent Document 7) discloses an artificial nail having a thickness that continuously increases from a portion corresponding to the base of the nail to a portion corresponding to the toe. Since this artificial nail has a small thickness corresponding to the base of the nail, it is highly flexible and easily adapted to the nail, while a sufficient thickness can be ensured because the thickness corresponding to the nail tip is large. It is said. However, the tip portion having a particularly large thickness has a low degree of freedom in shape and still has an unnatural appearance.

  On the other hand, sculpture is a technique for directly forming an artificial nail on an own nail using an acrylic resin or the like. For sculpture, a technique using an acrylic polymer powder and a liquid acrylic monomer that undergoes a polymerization reaction and hardens when mixed is known (for example, see Japanese Patent Application Laid-Open No. 55-108309 (Patent Document 8)). In this technology, when acrylic polymer powder and liquid acrylic monomer are mixed, curing begins, so there is a time limit when forming an acrylic resin artificial nail, so an artificial nail having a desired shape is formed. Difficult to do. Moreover, there existed a problem that a bubble entered in the hardened resin and a beauty | look was impaired.

  Regarding the sculpture, a technique called “gel nail” is also known (see, for example, WO 00/076366 (Patent Document 9)). In this technique, a gel-like photocurable resin is applied to a nail and arranged into a nail shape, and then light such as ultraviolet rays is irradiated to cure the photocurable resin. In the case of this technique, since the resin is not cured unless it is irradiated with light, there is no time limit when the artificial nail is formed. However, in order to prepare the gel-like photocurable resin into a desired shape by this method, a high technique and a skilled technique are required. Therefore, the cost required for mounting the artificial nail becomes high.

  In addition, the sculpture as described above had the following problems: the nail surface was thinned with a file in order to improve the adhesion of the artificial nail to the self nail. The photoinitiator contained in the resin composition used to form the artificial nail may cause damage to the nail and skin; the thickness and shape of the artificial nail become uneven easy.

  A technique called “chip overlay” is also known as a technique combining the technique using the nail chip and the sculpture technique. Regarding this technique, for example, Japanese Patent Laid-Open No. 2001-353021 (Patent Document 10) can be referred to. Specifically, the chip overlay is formed by adhering an artificial nail (nail chip) having the shape of the tip of the nail to the tip of the nail, and then applying a curable resin to the nail to form the shape before the resin is cured. It is a technique to arrange. However, this technique has the same problems as described above in relation to the technique using the nail chip and the sculpture technique.

Japanese Patent Publication No. 7-7352 US Pat. No. 5,676,165 Japanese Laid-Open Patent Publication No. 2002-238652 Japanese Unexamined Patent Publication No. 2004-254877 Japanese Unexamined Patent Publication No. 2004-275736 Japanese Unexamined Patent Publication No. 2007-195568 Japanese Unexamined Patent Publication No. 2008-509796 Japanese Unexamined Patent Publication No. 55-108309 WO00 / 076366 Japanese Laid-Open Patent Publication No. 2001-353021

  Unlike conventional artificial nails having a uniform and unnatural shape as well as excellent fit when attached to the nails, artificial nails having a natural appearance adapted to individual nails, and such It has been desired to develop a method for manufacturing an artificial nail in a short time without imposing physical and economic burdens on the user by a simple operation.

  Under such circumstances, as a result of intensive studies by the inventor in order to solve the above-mentioned problems, surprisingly, an outer layer having a shape of a nail, and a lower layer positioned directly below or directly in contact with the outer layer. An artificial nail having a multilayer structure including an attached inner layer, and the outer layer and the inner layer cooperate to form a cross section perpendicular to the longitudinal central axis of the artificial nail in a desired curved shape as a whole. The artificial nail is characterized not only by its excellent fit when attached to the nail, but also by adapting to individual nails, unlike conventional artificial nails having a uniform and unnatural shape And found to have a natural appearance. Further, this excellent artificial nail provides an outer layer forming thin piece having the shape of an artificial nail and an inner layer forming thin piece having a shape overlapping the lower surface from the lower side, provided that the outer layer forming thin piece and the inner layer forming piece are provided. At least one of the flakes is curved in a direction transverse to the longitudinal central axis of the artificial nail, and the inner layer-forming flake is placed on the lower surface of the outer layer-forming flake in a direction crossing the longitudinal central axis of the artificial nail To form a multilayer structure including an outer layer and an inner layer, and the outer layer and the inner layer cooperate to form a cross section perpendicular to the longitudinal central axis of the artificial nail as a whole. It has been found that a manufacturing method characterized by forming a curved shape can be manufactured in a short time without any physical and economic burden on the user by a simple operation. Based on these findings, the present invention has been completed.

  These and other objects, features and advantages of the present invention will become apparent from the following detailed description and appended claims, taken in conjunction with the accompanying drawings.

  The artificial nail of the present invention has a very high degree of freedom in the shape of the cross section perpendicular to the central axis in the longitudinal direction over its entire length, so that not only the fitting property when attached to the nail is improved, but also the uniform Unlike a conventional artificial nail having an unnatural shape, a natural appearance adapted to each nail can be exhibited. Furthermore, by the production method of the present invention, the above-described excellent artificial nail can be produced in a short time without any physical and economic burden on the user by a simple operation.

According to one aspect of the present invention, there is provided an artificial nail having a multilayer structure including an outer layer having a shape of a nail and an inner layer located below and attached to the outer layer directly or in an articulated manner.
The artificial nail is characterized in that the outer layer and the inner layer cooperate to form a cross section perpendicular to the longitudinal central axis of the artificial nail in a desired curved shape as a whole.

According to another aspect of the present invention, a method for manufacturing an artificial nail,
Provided are an outer layer forming flake having an artificial nail shape and an inner layer forming flake having a shape overlapping the lower surface thereof from the lower side, provided that at least one of the outer layer forming flake and the inner layer forming flake is an artificial nail The inner layer-forming flakes are curved in the direction transverse to the longitudinal central axis of the artificial nail and are directly or articulated by shifting the inner layer-forming flakes to the lower surface of the outer layer-forming flakes in a direction transverse to the longitudinal central axis of the artificial nail. A multi-layer structure including an outer layer and an inner layer is attached, and the outer layer and the inner layer cooperate to form a cross section perpendicular to the longitudinal central axis of the artificial nail in a desired curved shape as a whole. A featured manufacturing method is provided.

  Next, in order to facilitate understanding of the present invention, basic features and preferred embodiments of the present invention will be listed.

1. An artificial nail having a multi-layer structure including an outer layer having a nail shape and an inner layer located below and attached to the outer layer directly or jointly,
An artificial nail characterized in that the outer layer and the inner layer cooperate to form a cross section perpendicular to the longitudinal central axis of the artificial nail in a desired curved shape as a whole.

2. 2. The artificial nail according to item 1 above, wherein the curved shape of the cross section perpendicular to the longitudinal central axis of the artificial nail is asymmetric with respect to a perpendicular passing through the longitudinal central axis of the artificial nail.

3. 3. The artificial nail as described in 1 or 2 above, wherein the inner layer is attached to the outer layer via an interlayer combination extending along the longitudinal central axis of the artificial nail.

4). 4. The artificial nail according to any one of items 1 to 3, wherein the inner layer is attached to the outer layer at both side edges of the longitudinal central axis of the artificial nail.

5). A method for manufacturing an artificial nail,
Provided are an outer layer forming flake having an artificial nail shape and an inner layer forming flake having a shape overlapping the lower surface thereof from the lower side, provided that at least one of the outer layer forming flake and the inner layer forming flake is an artificial nail And the inner layer-forming flakes are shifted directly or related to the lower surface of the outer layer-forming flakes in a direction transverse to the longitudinal central axis of the artificial nail. A multi-layer structure including an outer layer and an inner layer is attached to the surface, and the outer layer and the inner layer cooperate to form a cross section perpendicular to the longitudinal central axis of the artificial nail in a desired curved shape as a whole. The manufacturing method characterized by the above-mentioned.

6). 6. The method according to item 5 above, wherein the curved shape of the cross section perpendicular to the longitudinal central axis of the artificial nail is asymmetric with respect to a perpendicular passing through the longitudinal central axis of the artificial nail.

7). 7. The method according to item 5 or 6 above, wherein the inner layer-forming flake is attached to the outer layer-forming flake at an articulation through an interlayer combination extending along the longitudinal central axis of the artificial nail.

8). 8. The method according to any one of items 5 to 7 above, wherein the inner layer-forming flakes are attached to the outer layer-forming flakes at both side edges of the longitudinal central axis of the artificial nail.

9. Both the outer layer forming flake and the inner layer forming flake are curved in a direction transverse to the longitudinal central axis of the artificial nail, and the curvature of the curvature of the outer layer forming flake is different from the curvature of the curvature of the inner layer forming flake. The method according to any one of the preceding items 5 to 8, wherein

10. An artificial nail manufacturing kit comprising an outer layer forming thin piece having an artificial nail shape, and an inner layer forming thin piece having a shape overlapping the lower surface of the outer layer forming thin piece from below,
At least one of the outer layer forming thin piece and the inner layer forming thin piece is curved in a direction crossing the longitudinal central axis of the artificial nail,
The artificial nail has a multilayer structure including an outer layer having a shape of a nail and an inner layer positioned below and attached to the outer layer directly or in an articulated manner, and the outer layer and the inner layer cooperate with each other. As a whole, a cross section perpendicular to the longitudinal central axis of the artificial nail is formed in a desired curved shape,
An artificial nail manufacturing kit characterized by that.

11. 11. The kit according to item 10 above, wherein the curved shape of the cross section perpendicular to the longitudinal central axis of the artificial nail is asymmetric with respect to a perpendicular passing through the longitudinal central axis of the artificial nail.

12 Both the outer layer forming thin piece and the inner layer forming thin piece are curved in a direction crossing the longitudinal central axis of the artificial nail, and the curvature of the outer layer forming thin piece is different from the curvature of the inner layer forming thin piece, 12. A kit for producing an artificial nail as described in 10 or 11 above.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view of a conventional artificial nail 1. As shown in FIG. 1, the artificial nail 1 usually has a shape imitating a human nail and is attached to the nail using an adhesive or the like.

  FIG. 2 is a cross-sectional view of a conventional artificial nail 1 (cross-sectional view taken along line I-I in FIG. 1). The conventional artificial nail 1 is generally manufactured by injection molding or the like, and as shown in FIG. 2, the curves are symmetrical in the direction crossing the central axis in the longitudinal direction of the artificial nail.

  On the other hand, the artificial nail of the present invention, as shown in FIGS. 3 (b) and 3 (c), which will be described later, is positioned directly below or on the outer layer 3 having a nail shape and the lower side thereof. An artificial nail having a multilayer structure including an inner layer 4 attached to an articulation, wherein the outer layer 3 and the inner layer 4 cooperate with each other, and as a whole, a cross section perpendicular to the longitudinal central axis of the artificial nail 2 Is an artificial nail characterized by being formed in a desired curved shape. Specifically, FIG. 3 (b) is a cross-sectional view of one embodiment of the artificial nail of the present invention in which both side edges of the inner layer are respectively attached to positions B and C of the outer layer, and FIG. c) is a cross-sectional view of another embodiment of the artificial nail of the present invention in which both side edge portions of the inner layer are respectively attached to the positions B and D of the outer layer shown in (a) above (both in FIG. 1). Sectional view at a position corresponding to the position of line II). Specific means for making the cross-section of the artificial nail into a desired curved shape by the cooperation of the outer layer 3 and the inner layer 4 will be described later in connection with the manufacturing method of the present invention.

  Further, in the present invention, the “desired curved shape” may be a curved shape adapted to the curvature of the nail to which the artificial nail is to be attached, or a shape different from the curvature of the nail to which the artificial nail is to be attached. There may be.

  In the artificial nail 2 of the present invention, each material of the outer layer 3 and the inner layer 4 is not particularly limited as long as it is a material generally used for an artificial nail. Examples of the material include a transparent or opaque flexible resin. For example, a thin piece made of metal. As the flexible resin, for example, at least one resin selected from the group consisting of vinyl chloride, polyethylene, polypropylene, polyethylene terephthalate, fluorocarbon resin, acrylic resin, ABS resin, and urethane resin can be used. Further, the outer layer and the inner layer may be formed using different materials.

  In the artificial nail 2 of the present invention, the thickness of the outer layer 3 is preferably in the range of 50 μm to 1,000 μm, and the thickness of the inner layer 4 is preferably in the range of 50 μm to 1,000 μm. The thickness of the outer layer 3 is more preferably in the range of 100 μm to 600 μm, and particularly preferably in the range of 200 μm to 500 μm. The thickness of the inner layer 4 is more preferably in the range of 100 μm to 500 μm, and particularly preferably in the range of 200 μm to 300 μm. Further, regarding the thicknesses of the outer layer 3 and the inner layer 4, it is desirable to gradually increase the thickness from the base to the tip of the artificial nail, and in the cross section perpendicular to the longitudinal central axis of the artificial nail, It is desirable to make it gradually smaller over the part. The optimum thickness of the outer layer 3 and the optimum thickness of the inner layer 4 are the curved shape of the cross section perpendicular to the other manufacturing conditions (materials of the outer layer 3 and the inner layer 4) and the longitudinal central axis of the artificial nail 2, respectively. It can be appropriately selected depending on the type of the above.

  In the present invention, since the thickness of each of the outer layer 3 and the inner layer 4 can be about half the thickness of a conventional artificial nail (nail chip), the outer layer 3 and the inner layer 4 can be easily bent, and the artificial nail The degree of freedom of the shape of the cross section perpendicular to the central axis in the longitudinal direction is great.

  In the artificial nail 2 of the present invention, the curved shape of the cross section perpendicular to the longitudinal central axis of the artificial nail 2 may be symmetric or asymmetric with respect to a perpendicular passing through the longitudinal central axis of the artificial nail 2. Also good. However, natural nails often have a curved shape in cross section perpendicular to the longitudinal central axis of the nail that is asymmetric with respect to a perpendicular (eg, line AA ′ in FIG. 4) passing through the longitudinal central axis of the nail. Yes (in other words, it has an asymmetric shape when viewed from a fingertip having a nail). Therefore, from the viewpoint of providing an artificial nail having a more natural shape, in many cases, a cross section perpendicular to the central axis in the longitudinal direction of the artificial nail 2 as shown in FIGS. 3 (b) and 3 (c). Is preferably asymmetric with respect to a perpendicular passing through the central axis of the artificial nail 2 in the longitudinal direction.

  In the artificial nail 2 of the present invention, as shown in FIG. 4, it is preferable that at least one bending auxiliary groove 3 ′ extending in the longitudinal direction of the artificial nail 2 is provided below the outer layer 3. When the auxiliary bending groove 3 ′ is provided, the degree of freedom in adjusting the curved shape can be greatly increased while maintaining the strength in the longitudinal direction of the artificial nail 2. The range of the number of the auxiliary bending grooves 3 'is preferably 1 to 10, more preferably 2 to 10, more preferably 3 to 8, and further preferably 4 to 6. In the case where a plurality of auxiliary bending grooves 3 ′ are used, the interval between adjacent grooves 3 ′ is not particularly limited, but generally a range of 1 to 2 mm is preferable. Further, instead of providing the groove 3 ′, the portion corresponding to the position of the groove 3 ′ may be made of a material having higher flexibility than the material of the other portion of the outer layer 3. Further, the depth of the auxiliary bending groove 3 ′ is usually 10 to 90% of the thickness of the outer layer 3, preferably 30 to 70%, and more preferably 40 to 60%. The width of the bending auxiliary groove 3 ′ is usually 0.1 to 1 mm, preferably 0.2 to 0.8 mm, and more preferably 0.4 to 0.7 mm.

  In the artificial nail 2 of the present invention, it is preferable that the whole or most of the lower side of the outer layer 3 overlaps the whole upper side of the inner layer 4 from the viewpoint of the strength of the artificial nail. Moreover, when most of the lower side of the outer layer 3 overlaps with the entire upper side of the inner layer 4, it is preferable that the inner layer 4 and the outer layer 3 have a similar shape. The “most part” is preferably 80% or more of the lower side of the outer layer 3, and more preferably 85% or more. However, in the artificial nail 2 of the present invention, the inner layer 4 may be located only at the lower front end of the outer layer 3.

  As a positional relationship between the natural nail and the inner layer 4, the inner layer 4 may be located only in a portion corresponding to (contacting with) the natural nail, or may be positioned only in a portion not corresponding to (contacting with) the natural nail. Alternatively, it may be located in a portion extending over both the portion corresponding to the natural nail and the portion not corresponding to the natural nail.

  In the artificial nail 2 of the present invention, as shown in FIG. 8, the inner layer 4 is attached to the outer layer 3 via the interlayer coupling body 3 b, and the interlayer coupling body 3 b is arranged in the longitudinal direction of the artificial nail 2. It is one of preferable embodiments that extends along the central axis and that the upper side and the lower side of the interlayer coupling 3b are attached to the outer layer 3 and the inner layer 4, respectively. When the artificial nail 2 of the present invention has the interlayer combination 3b, in the production of the artificial nail 2, the curved shape of the artificial nail 2 on both sides of the central axis in the longitudinal direction of the artificial nail 2 can be easily adjusted independently. preferable. For example, it becomes easier to make the curved shape of the cross section perpendicular to the longitudinal central axis of the artificial nail 2 both asymmetrical and symmetric with respect to a perpendicular passing through the longitudinal central axis of the artificial nail 2.

  In another preferred embodiment of the artificial nail 2 of the present invention, as shown in FIG. 4, the outer layer 3 is attached to the lower side of the artificial nail 2 and at least one place on or near the longitudinal central axis of the artificial nail 2. It has a protrusion 3 ", the inner layer 4 has a hole 4 'on the upper side thereof that can fit and receive the mounting protrusion, and the mounting protrusion 3" of the outer layer 3 is inserted into the hole 4' of the inner layer 4. Thus, the inner layer 4 may be attached to the outer layer 3. This embodiment is also preferable because the curved shape of the artificial nail 2 on both sides of the central axis in the longitudinal direction of the artificial nail 2 can be easily adjusted independently as in the case of using the above-mentioned interlayer combination. The number of the mounting protrusions 3 "is not particularly limited, but usually 2 or 3 is preferable. When a plurality of mounting protrusions 3" are used, the interval between adjacent mounting protrusions 3 "is not particularly limited. However, in general, the range of 2 to 10 mm is preferable.The shape of the mounting protrusion 3 "viewed from the lower side of the outer layer 3 is not particularly limited, and can be appropriately selected from a circle, an ellipse, a polygon, and the like. In the case of a shape such as a circle, an ellipse, or a polygon, the diameter or maximum diameter is usually 0.5 to 3 mm, preferably 0.8 to 2.5 mm, and preferably 1 to 2 mm. More preferred. In the case of using a single mounting protrusion 3 ", it is desirable to prevent the positional relationship from changing by rotating one or both of the inner layer 4 and the outer layer 3 with the single mounting protrusion 3" as a rotation axis. The shape of the mounting projection 3 "viewed from the lower side of the outer layer 3 is preferably a rectangle having a width of 1 to 3 mm and a length of 2 to 10 mm, and the rectangular mounting projection 3" is an artificial More preferably, it extends along the central axis of the claw 2 in the longitudinal direction. Further, the height of the mounting protrusion 3 "is usually less than 10 to 100% of the thickness of the inner layer 4, preferably 20 to 90%, and more preferably 40 to 80%. The shape and dimensions of 4 ′ are not particularly limited as long as the mounting projection 3 ″ can be fitted and received. Contrary to the above, the inner layer 4 has the above-mentioned mounting projection on the upper side thereof, at least one place on the longitudinal center axis of the artificial nail 2 or in the vicinity thereof, and the outer layer 3 on the lower side thereof. You may have a hole of.

  In still another preferred embodiment of the artificial nail 2 of the present invention, the inner layer 4 may be attached to the outer layer 3 with double-sided tape. In this case, the attachment method using the double-sided tape is not particularly limited, but a preferred example of the attachment method will be described later in connection with the method for manufacturing an artificial nail of the present invention.

  In the artificial nail 2 of the present invention, it is preferable that the inner layer 4 is attached to the outer layer 3 at both side edges of the central axis in the longitudinal direction of the artificial nail 2 from the viewpoint of ease of giving the artificial nail 2 a curved shape. .

  Further, the upper surface of the artificial nail 2 (that is, the upper surface of the outer layer 3 having a nail shape) may have a desired two-dimensional or three-dimensional decoration pattern. The decoration pattern is not particularly limited, and examples thereof include plants (flowers, leaves, trees, etc.), animals, celestial bodies (stars, moons, comets, etc.), human images and reliefs. In addition, a decorative article or jewelry made of glass or the like may be removably attached to the upper surface of the outer layer or may be permanently fixed.

  The artificial nail of the present invention can be attached to the own nail by a known artificial nail attachment method.

  Next, a method for producing the artificial nail of the present invention will be described.

According to another aspect of the present invention, a method for manufacturing an artificial nail,
Provided are an outer layer forming flake having an artificial nail shape and an inner layer forming flake having a shape overlapping the lower surface thereof from the lower side, provided that at least one of the outer layer forming flake and the inner layer forming flake is an artificial nail And the inner layer-forming flakes are shifted directly or related to the lower surface of the outer layer-forming flakes in a direction transverse to the longitudinal central axis of the artificial nail. A multi-layer structure including an outer layer and an inner layer is attached to the surface, and the outer layer and the inner layer cooperate to form a cross section perpendicular to the longitudinal central axis of the artificial nail in a desired curved shape as a whole. The manufacturing method characterized by this is provided.

  The materials for the outer layer forming flakes and the inner layer forming flakes are as described above for the outer layer and inner layer materials. Moreover, the flexibility of the flexible resin film used as the outer layer forming thin piece and the inner layer forming thin piece can be adjusted by appropriately selecting the molecular weight of the resin, the thickness of the film, and the like. Further, the thicknesses of the inner layer forming flakes and the outer layer forming flakes may be in the ranges described above as the thicknesses of the outer layer and the inner layer.

  In the method of the present invention, after providing the inner layer forming flakes and the outer layer forming flakes, the inner layer forming flakes cross the longitudinal center axis of the artificial nail on the lower surface of the outer layer forming flakes. A multi-layer structure including an outer layer and an inner layer, which are attached directly or in an articulated manner, and the outer layer and the inner layer cooperate to form a cross section perpendicular to the longitudinal central axis of the artificial nail as a whole. A desired curved shape is formed. In the present invention, “shift” means that when the inner layer forming thin piece is attached to the outer layer forming thin piece, (1) as shown in FIGS. 3 (b) and 3 (c), the outer layer and the inner layer are arranged in the longitudinal direction. (2) As shown in FIG. 4, the central axes in the longitudinal direction of the outer layer and the inner layer are overlapped with each other, but the mounting positions of both side edges of the inner layer with respect to the outer layer are different ( That is, as shown in FIG. 4, the distance from the outer layer side edge to the inner layer side edge is made different between the one side edge and the other side edge of the artificial nail) To do.

  Further, the cross-sectional shape of the inner layer-forming thin piece and the cross-sectional shape of the outer-layer-forming thin piece may be the same or different (here, “cross-sectional shape” means the inner layer-forming thin piece and the outer layer-forming thin piece. Each means the shape of a cross section perpendicular to the central axis corresponding to the longitudinal central axis of the artificial nail).

Moreover, when the cross-sectional shape of the inner layer forming thin piece is different from the cross-sectional shape of the outer layer forming thin piece, examples of combinations of the inner layer forming thin piece and the outer layer forming thin piece include the following.
(1) Only one of the inner layer forming thin piece and the outer layer forming thin piece is curved in a direction crossing the longitudinal central axis of the artificial nail.
(2) Both the inner layer forming thin piece and the outer layer forming thin piece are curved in a direction crossing the longitudinal central axis of the artificial nail, and the curvature of the inner layer forming thin piece and the curvature of the outer layer forming thin piece are different.
(3) Both the inner layer forming thin piece and the outer layer forming thin piece are curved in a direction crossing the longitudinal central axis of the artificial nail, and the curvature of at least one of the inner layer forming thin piece and the outer layer forming thin piece is non-uniform. (For example, when using an inner layer forming flake and / or an outer layer forming flake having a large curvature at the side edge portion and a small curvature at the central portion).

  The means for attaching the inner layer-forming flakes to the lower surface of the outer layer-forming flakes can be performed by a known method similar to that used for multilayering in the production of a known multilayer structure artificial nail. Specifically, it can be performed using, for example, a double-sided tape or an adhesive.

  In the method of the present invention, the curved shape of the cross section perpendicular to the longitudinal central axis of the artificial nail to be manufactured may be symmetric or asymmetric with respect to a perpendicular passing through the longitudinal central axis of the artificial nail. Good. In this respect, the same explanation as described in the explanation of the artificial nail of the present invention applies. That is, as described above, natural nails often have a curved cross-sectional shape perpendicular to the longitudinal central axis of the nail that is asymmetric with respect to a perpendicular passing through the longitudinal central axis of the nail (in other words, When viewed from the fingertip it has, it has a left and right non-target shape). Therefore, from the viewpoint of providing an artificial nail having a more natural shape, in many cases, the curved shape of the cross section perpendicular to the longitudinal central axis of the artificial nail is asymmetric with respect to a perpendicular passing through the longitudinal central axis of the artificial nail. Preferably there is.

  In the method of the present invention, as shown in FIG. 4, it is preferable that at least one bending auxiliary groove 3 ′ extending in the longitudinal direction of the artificial nail is provided on the lower surface of the outer layer forming thin piece. When it has this curve auxiliary groove 3 ', the degree of freedom of curve shape adjustment can be greatly increased while maintaining the strength in the longitudinal direction of the artificial nail. In this respect, the same explanation as described in the explanation of the artificial nail of the present invention is applicable.

  In the method of the present invention, by appropriately selecting the size and shape of the inner layer forming flakes and the outer layer forming flakes, and the attachment positional relationship between these thin pieces, the entire lower surface of the outer layer is obtained in the artificial nail obtained. Alternatively, it is preferable that most (preferably 80% or more, more preferably 85% or more) overlap the entire upper side of the inner layer. However, the inner layer forming flakes may be attached only to the front end portion of the lower surface of the outer layer forming flakes. Also, regarding the cross-sectional shape of the inner layer forming thin piece and the width of the outer layer forming thin piece, when the curved shape of the artificial nail is adjusted by shifting the inner layer forming thin piece, both side ends of the lower layer do not protrude from both sides of the upper layer. In order to do so, it is preferable to make the width of the inner layer forming flakes smaller than the width of the outer layer forming flakes. In this case, the ratio of the width of the inner layer forming thin piece to the width of the outer layer forming thin piece is preferably 0.60 to 0.98, more preferably 0.65 to 0.95, and It is especially preferable that it is 80-0.90.

  Moreover, you may implement the method of this invention, after attaching the slice for inner layer formation to a natural nail | claw.

  Regarding the positional relationship between the natural nail and the inner layer forming thin piece, the same explanation as described in the explanation of the artificial nail of the present invention applies.

  Preferably, in the method of the present invention, the inner layer-forming flakes are attached to the outer layer-forming flakes via an interlayer joint extending along the longitudinal central axis of the artificial nail. At this time, the upper and lower sides of the interlayer combination are attached to the outer layer and the inner layer, respectively. In this respect, the same explanation as described in the explanation of the artificial nail of the present invention is applicable.

  In another preferred embodiment of the method of the present invention, as shown in FIG. 4, the lower surface of the outer layer forming slice has an attachment projection at at least one location along the longitudinal central axis of the artificial nail. Then, the upper surface of the inner layer forming thin piece has a hole that can accept the fitting protrusion, and the outer layer forming thin piece is inserted into the hole of the inner layer forming thin piece to form the inner layer. The thin piece may be attached to the thin piece for forming the outer layer. In this respect, the same explanation as described in the explanation of the artificial nail of the present invention is applicable.

  In yet another preferred embodiment of the method of the present invention, the inner layer forming flakes may be attached to the outer layer forming flakes with double-sided tape. In this case, the attachment method using the double-sided tape is not particularly limited. For example, in terms of ease of independently adjusting the curved shape of the artificial nail 2 on both sides of the longitudinal central axis of the artificial nail 2, The attachment method is preferable. With the double-sided tape, the upper surface of the inner layer forming thin piece and the lower surface of the outer layer forming thin piece are first mutually only in the central region of about 1 to 5 mm in width along the longitudinal central axis of the artificial nail 2. The side edges of the central axis in the longitudinal direction of the artificial nail 2 are not yet bonded to each other. In this state, it is easy to independently adjust the curved shape of the artificial nail 2 on both sides of the longitudinal central axis of the artificial nail 2. In this state, a desired curved shape is formed at each of both side edges, and both side edges of the inner layer forming thin piece and the outer layer forming thin piece are bonded to each other with a double-sided tape.

  In the method of the present invention, it is preferable to attach the inner layer-forming flakes to the outer layer-forming flakes at both side edges of the longitudinal central axis of the artificial nail. In this respect, the same explanation as described in the explanation of the artificial nail of the present invention is applicable.

  The production method of the present invention will be specifically described below with reference to the drawings. (In the drawing, for convenience, the outer layer forming flake and the outer layer formed therefrom are both indicated by reference numeral 3, and the inner layer forming flake and the inner layer formed therefrom are both indicated by reference numeral 4.)

  FIG. 3 (a) shows one example of the outer layer forming thin piece 3 and one example of the inner layer forming thin piece 4 used in the method of the present invention. In this figure, the outer layer forming thin piece 3 has a larger curvature than the inner layer forming thin piece 4. Therefore, when the inner layer forming thin piece 4 is attached to the outer layer forming thin piece 3, the inner layer forming thin piece 4 acts to reduce the curvature of the outer layer forming thin piece 3.

  The artificial nail 2 of the present invention shown in FIG. 3 (b) has one of the inner layer-forming thin pieces 4 at the position B near one side edge of the outer layer-forming thin piece 3 shown in FIG. 3 (a). Manufactured by attaching the side edge, and then attaching the other side edge of the inner layer forming piece 4 at the position C near the other side edge of the other outer layer forming piece 3 It is.

  On the other hand, the artificial nail 2 of the present invention shown in FIG. 3 (c) has the 1 of the inner layer forming thin piece 4 at the position B near one side edge of the outer layer forming thin piece 3 shown in FIG. 3 (a). Is attached to the other side edge of the outer layer forming piece 3 at the position D in the vicinity of the other side edge of the outer layer forming piece 3. It is a thing.

  In both FIG. 3B and FIG. 3C, the inner layer forming thin piece 4 is attached to be shifted to the position B side of the outer layer forming thin piece 3. That is, the central axis A ′ in the longitudinal direction of the inner layer forming thin piece 4 is shifted to the position B side from the central axis A in the longitudinal direction of the outer layer forming thin piece 3, and the outer layer 4 side edge from the inner layer attaching position B. Is smaller than the distance from the inner layer attachment position C or D to the outer layer 4 side edge. Further, due to the difference between the inner layer attachment position C in FIG. 3 (b) and the inner layer attachment position D in FIG. 3 (c), the artificial nail 2 shown in FIG. 3 (b) and the artificial nail 2 shown in FIG. Then, the curved shape of the cross section perpendicular to the longitudinal central axis of the artificial nail 2 is different. That is, in FIG. 3 (c), the inner layer forming thin piece 4 is attached in a state where the curvature of the outer layer forming thin piece 3 is larger than that of the artificial nail 2 shown in FIG. Even maintaining a large curved shape. The degree of deviation between the longitudinal center axis A of the outer layer forming thin piece 3 and the longitudinal center axis A ′ of the inner layer forming thin piece 4 and fixing of the side edge portion of the inner layer forming thin piece 4 to the outer layer forming thin piece 3 By appropriately adjusting the position, artificial nails having various cross-sectional shapes can be manufactured.

  4A shows that the inner layer forming thin piece 4 is overlapped with the outer layer forming thin piece 3, and the longitudinal central axis A ′ of the inner layer forming thin piece 4 is overlapped with the longitudinal central axis A of the outer layer forming thin piece 3. FIG. It is a figure which shows the state attached to. In this figure, contrary to FIG. 3, the outer layer forming thin piece 3 has a smaller curvature than the inner layer forming thin piece 4. Accordingly, when the inner layer forming thin piece 4 is attached to the outer layer forming thin piece 3, the inner layer forming thin piece 4 acts to increase the curvature of the outer layer forming thin piece 3.

  In FIG. 4 (b), both side edges of the upper surface of the inner layer forming thin piece 4 shown in FIG. 4 (a) are positioned at the positions of E and F in the vicinity of both side edges of the lower surface of the outer layer forming thin piece 3. To form an artificial nail 2 of the present invention. Compared to the attachment position F side, the attachment position E side has a curved shape with a cross section perpendicular to the central axis in the longitudinal direction of the artificial nail 2 by attaching the inner layer 4 with the outer layer 3 being largely curved. It is asymmetric with respect to a normal passing through the central axis of the claw 2 in the longitudinal direction.

  4 (a) and 4 (b), the bending auxiliary groove 3 'is formed on the lower side of the outer layer 3 as described above, but as shown in FIGS. 4 (a) and 4 (b). When the outer layer forming thin piece 3 has a smaller curvature than the inner layer forming thin piece 4 (that is, when the outer layer forming thin piece 3 needs to be curved relatively large), the auxiliary bending groove 3 ′. Is particularly effective.

  FIG. 5 (a) shows still another example of the outer layer forming thin piece 3 and another example of the inner layer forming thin piece 4 used in the method of the present invention. The curved shape of the cross section perpendicular to the longitudinal central axis of the artificial nail of the outer layer forming thin piece 3 and the inner layer forming thin piece 4 illustrated in FIGS. 3 and 4 is a curvature at all locations including the side edge portion and the central portion. However, as shown in FIG. 5 (a), it is possible to use a material whose curvature is relatively large depending on the location. In the example shown in FIG. 5A, both the outer layer forming thin piece 3 and the inner layer forming thin piece 4 have a large curvature at the side edge portion and a small curvature at the central portion.

  The artificial nail 2 of the present invention shown in FIG. 5 (b) has both side edges of the inner layer forming thin piece 4 at positions G and H that can be placed on both side edges of the outer layer forming thin piece 3 shown in FIG. 5 (a). Each is manufactured by attaching. In FIG. 5B, the inner layer forming thin piece 4 is attached to the position G side of the outer layer forming thin piece 3 while being shifted. That is, the central axis A ′ in the longitudinal direction of the inner layer forming thin piece 4 is shifted toward the position G from the central axis A in the longitudinal direction of the outer layer forming thin piece 3, and the outer layer 4 side edge from the inner layer attaching position G. Is smaller than the distance from the inner layer attachment position H to the outer layer 4 side edge.

  FIG. 6 is a cross-sectional view of still another embodiment of the artificial nail of the present invention. The artificial nail shown in FIG. 6 is manufactured using the inner layer forming thin piece 4 having the curved auxiliary protrusion 4a formed so as to extend along the longitudinal central axis of the upper surface. The bending auxiliary projection 4a functions as a fulcrum of the lever principle when the outer layer forming thin piece 3 is bent. Therefore, the use of the inner layer forming thin piece 4 having the bending assist protrusion 4a is particularly effective when it is desired to produce an artificial nail that is relatively large as a whole. The size and shape of the bending assist protrusion 4a are not particularly limited, but the height of the bending assist protrusion 4a is normally about 0.3 to 1.5 as a ratio to the thickness of the inner layer forming thin piece 4, and is 0. 0.5 to 1.3 is preferable, and 0.8 to 1.1 is more preferable.

  FIG. 7 is a cross-sectional view of still another embodiment of the artificial nail of the present invention. The artificial nail of FIG. 7 is manufactured using the outer layer forming thin piece 3 having the auxiliary bending protrusion 3a formed so as to extend along the longitudinal central axis of the lower surface. The function of the bending auxiliary protrusion 3a is the same as that of the bending auxiliary protrusion 4a in FIG. The size and shape of the bending assist protrusion 3a are not particularly limited, but the height of the bending assist protrusion 3a is usually about 0.3 to 1.5 as a ratio to the thickness of the outer layer forming thin piece 3, and is 0. 0.5 to 1.3 is preferable, and 0.8 to 1.1 is more preferable.

  FIG. 8 is a cross-sectional view of still another embodiment of the artificial nail of the present invention. The artificial nail of FIG. 8 is an embodiment using the above-mentioned interlayer combination 3b. As the material of the interlayer combination, those described above as the material of the inner layer and the outer layer can be used. Further, the thickness of the interlayer combined body is about 0.3 to 1.5, preferably 0.5 to 1.3, as a ratio to the thickness of the outer layer forming thin piece, preferably 0.8 to 1.1. It is more preferable that

  FIG. 9 (a) is a view showing the lower surface of another example of the outer layer forming thin piece used for forming the artificial nail of the present invention, and FIG. 9 (b) is the artificial nail of the present invention. FIG. 9 (c) is a view showing the upper surface of another example of the inner layer forming flake used for forming the inner layer. FIG. 9 (c) is obtained by attaching the inner layer of (b) to the outer layer of (a). It is a figure which shows the lower surface of the artificial nail | claw of this invention. The outer layer forming thin piece 3 shown in FIG. 9 (a) has roughened portions 5 and 5 on its lower surface, and the inner layer forming thin piece 4 shown in FIG. 9 (b) is rough on its upper surface. And 6 are provided. Further, in the inner layer forming thin piece 4 of FIG. 9B, adhesive injection ports 7 and 7 are formed in the vicinity of the centers of the roughened portions 6 and 6, respectively. The roughened portion is for strengthening the adhesion between the outer layer 3 and the inner layer 4 and can be formed by rubbing with a sandpaper or the like. The inner layer forming flakes 4 shown in FIG. 9 (b) are combined with the outer layer forming flakes 3 shown in FIG. 9 (a) in such a positional relationship that a desired curved shape can be obtained. The artificial nail 2 of the present invention as shown in FIG. 9C is formed by injecting an adhesive from 7, 7 and curing the adhesive. As the adhesive, a known one can be used. For example, a commercially available cyanoacrylate-based adhesive (so-called “instant adhesive”) or the like can be used. Specific examples of commercially available cyanoacrylate-based adhesives include “Aron Alpha” (registered trademark) manufactured by Toagosei Co., Ltd., Japan.

  FIG. 10 (a) is a perspective view of still another example of the outer layer forming thin piece 3 used for forming the artificial nail of the present invention, and FIG. 10 (b) shows the formation of the artificial nail of the present invention. It is a perspective view of another example of the thin piece 4 for inner layer formation used in order to do. The inner layer forming thin piece 4 shown in FIG. 10 (b) is provided with guide protrusions 9 used when adjusting the mounting position with respect to the outer layer forming thin piece 3, and the outer layer forming thin piece shown in FIG. 10 (a). 3, a guide groove 8 for receiving the guide protrusion 9 is formed. When attaching the inner layer forming thin piece 4 to the outer layer forming thin piece 3, the inner layer forming thin piece 4 is accommodated in the guide groove 8 of the inner layer forming thin piece 4. And the outer layer forming thin piece 3 are combined, and after adjusting the position, they are fixed with an adhesive or the like. In this case, the adhesive may be applied to either one or both of the inner layer forming thin piece 4 and the outer layer forming thin piece 3, and then the inner layer forming thin piece 4 and the outer layer forming thin piece 3 may be combined. It is preferable to provide an adhesive injection port in the inner layer forming thin piece 4 and determine the attachment position of the inner layer forming thin piece 4 before introducing the adhesive from the adhesive injection port for fixing.

  FIG. 11 is a view showing a lower surface of still another embodiment of the artificial nail of the present invention. In this embodiment, the inner layer 4 having a relatively small size is used. This inner layer has three adhesive inlets 7 and is attached to the outer layer 3 at three locations using these. Regarding a specific attachment method, after attaching the center part of the inner layer 4 to the outer layer 3, both side edges of the inner layer 4 may be attached to the outer layer 3, or after attaching one of the side edges of the inner layer 4 to the outer layer. Alternatively, it may be attached to the central portion of the inner layer 4 and the other one side edge portion of the inner layer 4. For the purpose of forming a cross section perpendicular to the longitudinal central axis of the artificial nail into a desired curved shape, a small inner layer 4 as shown in this figure is sufficient, but in this case, attention should be paid to the strength of the tip of the artificial nail. There is a need. For example, by increasing the thickness of the tip portion of the outer layer 3 or attaching the curable resin such as that commonly used for the above-mentioned “gel nail” after the inner layer 4 is attached to the outer layer 3 and curing it. It is desirable to improve the strength of the tip.

  12 (a) is a perspective view of another example of the inner layer-forming thin piece as seen from the back surface, and FIG. 12 (b) is a perspective view of the outer layer-forming thin piece as seen from the back surface of still another example. FIG. 13 is a perspective view seen from the back side of the artificial nail of the present invention manufactured using the inner layer forming thin piece and the outer layer forming thin piece shown in FIG. 12, and FIG. 14 is the artificial nail shown in FIG. It is sectional drawing along the II-II line. In this embodiment, the outer layer forming thin piece 3 has guide protrusions 3b extending along the width direction of the artificial nail on the lower surface of the front end, and the inner layer forming thin piece 4 is used as the outer layer forming thin piece 3. When it is attached to, the inner layer forming thin piece 4 is shifted along the guide projection 3b to adjust the curvature. As shown in FIG. 13, it is desirable that the height of the guide protrusion 3b matches the thickness of the tip of the inner layer forming thin piece 4. Further, the width of the inner layer forming thin piece and the width of the outer layer forming thin piece are as described above.

  Further, in order to give a desired three-dimensional decoration pattern to the upper surface of the artificial nail, the upper surface of the outer layer forming flake having the shape of the nail has a desired two-dimensional or three-dimensional decoration pattern. Also good. The decoration pattern is not particularly limited, and examples thereof include plants (flowers, leaves, trees, etc.), animals, celestial bodies (stars, moons, comets, etc.) and human images and reliefs. In addition, a decorative article or jewelry made of glass or the like may be detachably attached to the upper surface of the outer layer-forming thin piece, or may be permanently fixed. In addition, the application of the desired decoration pattern and the attachment or fixing of ornaments, jewelry, etc. may be performed on the outer layer forming flakes before the manufacture of the artificial nail, or on the outer layer after the manufacture of the artificial nail. You may do it.

  The artificial nail obtained by the method of the present invention can be filing (filed) or the like to adjust the shape as desired, and can be attached to the own nail by a known artificial nail attachment method.

According to yet another aspect of the invention,
An artificial nail manufacturing kit comprising an outer layer forming thin piece having an artificial nail shape, and an inner layer forming thin piece having a shape overlapping the lower surface of the outer layer forming thin piece from below,
At least one of the outer layer forming thin piece and the inner layer forming thin piece is curved in a direction crossing the longitudinal central axis of the artificial nail,
The artificial nail has a multilayer structure including an outer layer having a shape of a nail and an inner layer positioned below and attached to the outer layer directly or in an articulated manner, and the outer layer and the inner layer cooperate with each other. As a whole, a cross section perpendicular to the longitudinal central axis of the artificial nail is formed in a desired curved shape,
An artificial nail manufacturing kit is provided.

  As the outer layer forming flakes and the inner layer forming flakes used in the artificial nail production kit of the present invention, those described above in relation to the artificial nail and the production method of the present invention can be used.

  Further, for the same reason as described above in relation to the artificial nail of the present invention, the kit of the present invention has a curved shape of a cross section perpendicular to the longitudinal central axis of the artificial nail passing through the longitudinal central axis of the artificial nail. It is preferably for the production of artificial nails that are asymmetric with respect to the normal. In the kit of the present invention, both the outer layer forming thin piece and the inner layer forming thin piece are curved in a direction crossing the longitudinal central axis of the artificial nail, and the curvature of the outer layer forming thin piece is It is preferable that it is different from the curvature of curvature of the lamina.

  Furthermore, the kit of the present invention may contain the above-mentioned interlayer combination.

It is a perspective view which shows the conventional artificial nail | claw. It is sectional drawing of the conventional artificial nail | claw along the II line of FIG. (a) is a cross-sectional view of one example of each of the outer layer forming flakes and the inner layer forming flakes, and (b) is a case where both side edges of the inner layer are located at positions B and C of the outer layer shown in (a). It is sectional drawing of one aspect | mode of the artificial nail | claw of this invention attached, (c) is a book in which the both-sides edge part of an inner layer is attached to the position of B and D of the outer layer shown to said (a). It is sectional drawing of the other one aspect | mode of the artificial nail | claw of invention (all are sectional drawings in the position corresponding to the position of the II line of FIG. 1). (a) is a sectional view of another example of each of the outer layer forming thin piece and the inner layer forming thin piece, and (b) is a side edge of the inner layer at positions E and F of the outer layer shown in (a) above. FIG. 6 is a cross-sectional view of still another embodiment of the artificial nail of the present invention to which a portion is attached (all are cross-sectional views at a position corresponding to the position of line II in FIG. 1). (a) is a cross-sectional view of still another example of each of the outer layer forming flakes and the inner layer forming flakes, and (b) is both sides of the inner layer at positions G and H of the outer layer shown in (a) above. FIG. 2 is a cross-sectional view of still another embodiment of the artificial nail of the present invention to which an edge portion is attached (all are cross-sectional views at positions corresponding to the position of line II in FIG. 1). FIG. 10 is a cross-sectional view of still another embodiment of the artificial nail according to the present invention at a position corresponding to the position along line II in FIG. FIG. 6 is a cross-sectional view of a further another embodiment of the artificial nail of the present invention at a position corresponding to the position of line II in FIG. FIG. 6 is a cross-sectional view of a further another embodiment of the artificial nail of the present invention at a position corresponding to the position of line II in FIG. (a) is a figure which shows the lower surface of another example of the outer layer formation thin piece used in order to form the artificial nail of this invention, (b) forms the artificial nail of this invention It is a figure which shows the upper side surface of another example of the thin piece for inner layer formation used for this, (c) is the figure of this invention obtained by attaching the inner layer of said (b) to the outer layer of said (a). It is a figure which shows the lower surface of another one aspect | mode of the artificial nail. (a) is a perspective view of still another example of the outer layer forming thin piece, and (b) is a perspective view of still another example of the inner layer forming thin piece. It is a figure which shows the lower surface of another one aspect | mode of the artificial nail | claw of this invention. It is. (a) is the perspective view seen from the back surface of yet another example of the inner layer forming thin piece, and (b) is the perspective view seen from the back surface of still another example of the outer layer forming thin piece. It is the perspective view seen from the back surface of the artificial nail of this invention manufactured using the thin piece for inner layer formation and the thin piece for outer layer formation shown in FIG. It is sectional drawing along the II-II line of the artificial nail | claw shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conventional artificial nail 2 Artificial nail 3 of this invention Outer layer 3 'Artificial nail of this invention 3' Curve auxiliary groove 3 "Attachment protrusion 3a Curve auxiliary protrusion 3b formed in the lower surface of outer layer Below front end part of outer layer Guide protrusion 4 formed on the side surface Artificial nail inner layer 4 'mounting projection receiving hole 4a of the present invention Curve auxiliary protrusion 5 formed on the upper surface of the inner layer Roughness formed on the lower surface of the outer layer Roughened portion 7 formed on the upper surface of the inner layer 7 adhesive inlet 8 guide groove 9 formed on the lower surface of the outer layer guide protrusion A formed on the upper surface of the inner layer A longitudinal central axis of the outer layer A ′ center axis B, C, D, E, F, G, H in the longitudinal direction of the inner layer Mounting position of the inner layer

Claims (12)

An artificial nail having a multi-layer structure including an outer layer having a nail shape and an inner layer located below and attached to the outer layer directly or jointly,
An artificial nail characterized in that the outer layer and the inner layer cooperate to form a cross section perpendicular to the longitudinal central axis of the artificial nail in a desired curved shape as a whole.   The artificial nail according to claim 1, wherein a curved shape of a cross section perpendicular to the longitudinal central axis of the artificial nail is asymmetric with respect to a perpendicular passing through the longitudinal central axis of the artificial nail.   The artificial nail according to claim 1 or 2, wherein the inner layer is attached to the outer layer in an articulated manner through an interlayer combination extending along the longitudinal central axis of the artificial nail.   The artificial nail according to any one of claims 1 to 3, wherein the inner layer is attached to the outer layer at both side edges of the longitudinal central axis of the artificial nail. A method for manufacturing an artificial nail,
Provided are an outer layer forming flake having an artificial nail shape and an inner layer forming flake having a shape overlapping the lower surface thereof from the lower side, provided that at least one of the outer layer forming flake and the inner layer forming flake is an artificial nail And the inner layer-forming flakes are shifted directly or related to the lower surface of the outer layer-forming flakes in a direction transverse to the longitudinal central axis of the artificial nail. A multi-layer structure including an outer layer and an inner layer is attached to the surface, and the outer layer and the inner layer cooperate to form a cross section perpendicular to the longitudinal central axis of the artificial nail in a desired curved shape as a whole. The manufacturing method characterized by the above-mentioned.   6. The method according to claim 5, wherein the curved shape of the cross section perpendicular to the longitudinal central axis of the artificial nail is asymmetric with respect to a perpendicular passing through the longitudinal central axis of the artificial nail.   7. A method according to claim 5 or 6, wherein the inner layer forming flakes are attached to the outer layer forming flakes via an interlayer combination extending along the longitudinal central axis of the artificial nail.   The method according to any one of claims 5 to 7, wherein the inner layer forming flakes are attached to the outer layer forming flakes at both side edges of the longitudinal central axis of the artificial nail.   Both the outer layer forming thin piece and the inner layer forming thin piece are curved in a direction crossing the longitudinal central axis of the artificial nail, and the curvature of the outer layer forming thin piece is different from the curvature of the inner layer forming thin piece, A method according to any of claims 5 to 8, characterized in that An artificial nail manufacturing kit comprising an outer layer forming thin piece having an artificial nail shape, and an inner layer forming thin piece having a shape overlapping the lower surface of the outer layer forming thin piece from below,
At least one of the outer layer forming thin piece and the inner layer forming thin piece is curved in a direction crossing the longitudinal central axis of the artificial nail,
The artificial nail has a multilayer structure including an outer layer having a shape of a nail and an inner layer positioned below and attached to the outer layer directly or in an articulated manner, and the outer layer and the inner layer cooperate with each other. As a whole, a cross section perpendicular to the longitudinal central axis of the artificial nail is formed in a desired curved shape,
An artificial nail manufacturing kit characterized by that.   The kit according to claim 10, wherein the curved shape of the cross section perpendicular to the longitudinal central axis of the artificial nail is asymmetric with respect to a perpendicular passing through the longitudinal central axis of the artificial nail.   Both the outer layer forming thin piece and the inner layer forming thin piece are curved in a direction crossing the longitudinal central axis of the artificial nail, and the curvature of the outer layer forming thin piece is different from the curvature of the inner layer forming thin piece, The kit for manufacturing an artificial nail according to claim 10 or 11, wherein:

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