JP2729477B2 - Artificial nails - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial nail made of plastic for attaching and attaching to a natural nail of a human being to extend the tip of the natural nail.

[0002]

2. Description of the Related Art Natural nails of human beings are used to protect fingertips and to make it easy to grasp objects with fingertips.
When it extends for a long time, it is common to cut it short to prevent danger.

[0003] However, in order to make the fingertips look beautiful, especially for young women, many people extend their nails for a long time, and as a result, the elongated nails are often chipped or broken. In such a case, the damaged nail can be cut short, but in that case only the nail becomes short,
The overall balance is uneven and extremely unnatural.

Accordingly, measures in such a case include:
The simplest and most effective method is to attach an artificial nail to the shortened natural nail and artificially extend the nail.

[0005] Also, if you lose your nails due to injury or illness,
There is currently no medical solution for cracked nails, broken nails, deformed nails, etc., and therefore artificial nails are useful in such cases.

Conventionally, means for artificially extending the nail include:
Generally, a method is used in which a plastic artificial nail previously molded in the shape of a human natural nail is joined to the entire natural nail with an adhesive.

Although this method can extend the nail very easily, it has a drawback that it is weak in strength because it is adhered with a tape-shaped adhesive, and is more easily peeled off when it comes into contact with water. Therefore, it is usually limited to 24 to 48 hours of use. Further, in the conventional method of covering the entire natural nail, the tip of the artificial nail becomes insensitive, and the original sense of the nail tends to be lost.

Further, in this method, since the artificial nail is made of opaque plastic, the color tone becomes extremely unnatural when adhered to a natural nail. Therefore, the nail color must be applied not only to artificial nails but also to all natural nails. Therefore, this method is unacceptable to those who do not like to apply nail color to nails and who like the natural feeling of natural nails.

On the other hand, to improve the method of covering the entire natural nail as described above, the rear end of the artificial nail is slightly overlapped with the toe of the natural nail (free part of the nail plate) by using a cyanoacrylate adhesive. Then, a method of bonding and attaching is proposed.

[0010] This method does not cover the entire natural nail, so there is no need to worry about bacterial infection of the natural nail, which has been a problem in the past.
Further, since the nail is adhered only to the tip of the natural nail, a natural nail can be obtained without losing the original feeling of the nail and aesthetically similar to the natural nail.

However, according to this method, since the bonding area between the natural nail and the artificial nail is extremely small, sufficient bonding strength for practical use cannot be obtained, and the nail may come off during mounting, or the nail may be broken. Problems arise. Also, accurately attaching an artificial nail to a limited narrow portion at the tip of a natural nail is a very difficult task in practice, and requires considerable manual dexterity.

On the other hand, a method of attaching an artificial nail so as to cover about 1/3 or 2/3 of the tip of a natural nail has been generally attempted.

However, even in this method, the artificial nail to be used is opaque or translucent, like the artificial nail covering the entire natural nail. Therefore, when the artificial nail is adhered to the natural nail, the natural nail and the artificial nail are different due to the difference in color tone. Has a clear boundary.

In this case, only the surface of the adhesive portion of the artificial nail is sanded with sandpaper without damaging the natural nail.
While it is possible to make the boundaries somewhat inconspicuous, this requires considerable skill and time, which is quite difficult for the average person.

Also in this case, the line (yellow line) generated at the boundary between the toe and the nail bed becomes unclear, and the natural feeling of the natural nail cannot be obtained. Therefore, also in this case, it is assumed that the nail color is applied to the entire nail.

[0016] Further, as another means for forming an artificial nail, a paper pattern having an adhesive applied to the back side is attached to a fingertip, and an acrylic obtained by mixing powder and liquid with the tip of a small brush on the paper pattern and the natural nail is used. Apply a room temperature curing type resin, and after curing, nail clipper,
There is also a method of adjusting the shape with a file or the like. This method
Since artificial nails can be formed in a state that exactly matches the nail shape of each individual, it is possible to wear artificial nails that are aesthetically superior and have a natural feeling.

However, in practice, accurate embedding of the powder-liquid mixture on the toe requires considerable skill and advanced skills, which is too difficult for an individual to perform. Further, since the liquid component (methacrylic acid ester) used has a strong odor and a strong irritation to the skin, sufficient care must be taken in its handling.

[0018]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the problems found in the above-mentioned conventional artificial nail, and can be easily worn by an ordinary person by himself / herself. An object of the present invention is to provide an artificial nail having the same natural feeling as that described above, and without having to dare to apply a nail color.

[0019]

In order to solve the above-mentioned problems, an artificial nail according to the present invention comprises a transparent adhesive portion which adheres to a natural nail, and an opaque or semi-finish similar to the toe which extends the toe of the natural nail. It consists of a transparent extension.

That is, the portion that adheres to the natural nail, that is, the adhesive portion is transparent, and the portion that extends the toe of the natural nail, that is, the extension, is opaque or translucent similar to the toe of the natural nail.

Therefore, since the adhesive part of the artificial nail of the present invention is transparent, when the artificial nail is mounted on a natural nail using a transparent adhesive, the adhesive part of the artificial nail penetrates the base and is exactly the same as the natural nail. The color tone has a weak reddish color, so that the imitation feeling and unnatural feeling accompanying the artificial nail attachment are eliminated.

Further, there is no need to adhere the artificial nail to only a narrow part of the toe due to aesthetic problems, and it is possible to adhere to a wide range of the natural nail. For this reason, the bonding operation becomes extremely easy, and even a general person can easily mount it alone. Further, since the bonding area can be increased, the bonding strength is greatly improved, and a practically sufficient strength can be obtained.

On the other hand, in the case of the artificial nail of the present invention, it is of course possible to cover the entire natural nail, but it is extremely difficult to fit the artificial nail over the entire surface of the curved natural nail. It is not preferable from the viewpoint of nail protection.
Therefore, it is preferable that the bonding area covers about 1/3 to 2/3 of the natural nail. Even in this case, sufficient bonding strength can be obtained for practical use. A similar feeling is obtained.

Further, since the extension of the artificial nail is opaque or translucent and has a color tone similar to that of a natural nail,
When the artificial nail of the present invention is mounted, the adhesive portion has the original color tone of the natural nail, and the extension portion also has a color tone similar to the toe of the natural nail, so that it is generally seen in the conventional artificial nail. Such imitation is completely eliminated. Therefore, there is no need to dare to apply nail color.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. First, in a of the plan view of FIG. 1 and b of the left side view, 1 is a human finger, 2 is a natural nail at the tip of the finger 1, 3 is a toe of a natural nail 2, 4 is an artificial nail made of plastic, 5 is a transparent adhesive part of the artificial nail 4 which adheres to the natural nail 2;
Reference numeral 6 denotes an extension of the artificial nail 4 for extending the toe 3,
The adhesive part 5 and the extension part 6 are integrally formed, and the adhesive part 5 is 1/3 to 2
It is adhered to the natural nail 2 so as to cover about / 3.

Next, the attachment of the artificial nail to the natural nail will be described. From the artificial nails of various sizes, select the one that best fits your nail, and adjust the length, width, etc. with scissors and files as needed.

Next, after removing the stain on the surface of one's own nail, that is, the natural nail, with alcohol, disinfecting the nail, a cyanoacrylate instant adhesive is applied, and the artificial nail is immediately attached to a predetermined position and adhered. .

It is also possible to use an acrylic-based cold-setting resin of a powder-liquid mixture type as an adhesive. In this case, the material mixed with the tip of a small brush is thinly applied to the adhesive portion between the natural nail and the artificial nail. Apply and glue. At this time, excess resin is generated when the two are pressed against each other, and it is necessary to remove the resin before curing.

Since the artificial nail of the present invention has a transparent adhesive portion, the artificial nail is hardly noticeable when attached to a natural nail, and a practically sufficient natural feeling can be obtained.

However, at the rear end edge E of the artificial nail, that is, at the boundary portion with the natural nail, a step corresponding to the thickness of the bonding portion of the artificial nail occurs, which hinders the natural feeling. Can be removed by sanding or the like.

As shown in FIG. 2A of the left side view,
The thickness of the bonding portion 5 of the artificial nail 4 is gradually reduced toward the rear end. Thus, the step at the boundary can be reduced. Therefore, the polishing operation can be minimized, and the operation time can be reduced.

Further, in order to reduce the step at the boundary, the thickness of the bonding portion 5 of the artificial nail 4 is preferably as thin as possible. In this sense, as shown in FIG. Preferably, the thickness is smaller than the extension.

In this case, since a step is formed on the back side of the artificial nail 4 at the boundary between the bonding portion 5 and the extension portion 6, the positioning of the artificial nail 4 with respect to the natural nail 2 is facilitated, and the mounting is facilitated.

Next, when attaching the artificial nail of the present invention to a natural nail, as shown in FIG. 1, a yellow line X (a boundary between a transparent portion and an opaque or translucent portion) of the artificial nail 4 is used. And the line Y at the tip of the toe 3 of the natural nail 2 is desirably made to coincide.

However, in practice, it is almost impossible to make the two lines X and Y completely coincide with each other, and as shown in FIGS. It is a target. When such a shift occurs, a gap portion (a hatched portion) of the shift becomes transparent and becomes visually extremely unnatural. In addition, Z is a yellow line of the natural nail 2.

In this case, as shown in FIG. 4A, the mounting position of the artificial nail 4 is slid toward the base (nail root) of the natural nail 2 until there is no gap due to the displacement between the two lines X and Y. By doing so, the above problem can be solved.

Further, in this case, as shown in FIG. 4B, by mounting the yellow line Z of the natural nail 2 and the yellow line X of the artificial nail 4 as closely as possible, the aesthetics after bonding and the natural The feeling is improved.

When using the artificial nail 4 in which the thickness of the bonding portion 5 shown in FIG. 2B is smaller than the thickness of the extension portion 6, as shown in FIG. It is desirable that the line A of the natural nail 2 completely coincides with the line Y of the tip of the toe 3 of the natural nail 2. However, if a deviation occurs between the two lines A and Y, the part becomes transparent, which is extremely unnatural.

On the other hand, when there is no step due to the difference in thickness shown in FIG. 2A, it is possible to eliminate the gap due to the displacement by slightly sliding the mounting position to the nail root side of the natural nail 2. However, when there is a step, the mounting position cannot be slid toward the nail base.

In this case, as shown in FIG. 5, the yellow line X of the artificial nail 4 is set to be 0.1-0.1
The above problem can be solved by extending the portion B having a width of 5.0 mm to the position C shifted to the nail root side.

That is, when the tip of the natural nail 2 is worn along the line A of the step of the artificial nail 4, there is a slight shift between the tip line Y of the tip of the nail of the natural nail 2 and the line A of the step. Even so, the opaque or translucent portion B provided on the contact portion 5 side can cover the shift, thereby eliminating unnaturalness.

In this case, if the yellow line X of the artificial nail 4 and the yellow line Z of the natural nail 2 are fitted so as to match as much as possible, the aesthetics are further improved.

Here, the range of the portion B shown in FIG.
The minimum value is set to 0.1 because the line Y at the tip of the tip 3 of the toe 3 of the natural nail 2 and the line A at the step are generated when the artificial nail 4 is attached. Deviation
It is virtually impossible to keep it below 0.1 mm, so at least part B
Is required to have a width of 0.1 mm.

The reason why the maximum value is set to 5.0 mm is based on the following reason. For example, a natural nail 2 with a long toe 3
When the artificial nail 4 having a step is mounted, in order to hide only the deviation between the line Y at the tip of the toe 3 and the line A of the step of the artificial nail 4, the width of the portion B does not need to be so large. In order to make the yellow line X of the artificial nail 4 substantially coincide with the yellow line Z of the natural nail 2,
Since the range of the portion B must be expanded by a length corresponding to the following expression, and it is not common to make the toe 3 of the natural nail 2 longer than 5 mm, the maximum value of the width of the portion B is 5.0 mm. You have set. The width of the portion B is usually 0.5 to
1.5 mm is most preferred.

Next, the production of the artificial nail of the present invention will be described. Because of the necessity of forming a transparent adhesive portion, it is necessary to use at least one type of transparent thermoplastic resin. It is preferable that the bonding portion be as colorless and transparent as possible because of the necessity of transmitting the underlying color.

However, as long as the color of the base is not substantially changed, some color of transparency may be added.
Further, for the purpose of expressing healthier nails, a slight reddishness may be imparted.

Examples of the thermoplastic resin which can be used in the artificial nail of the present invention include polymethyl methacrylate, polystyrene, polycarbonate, polyvinyl chloride, polysulfone, polyether sulfone, polyethylene terephthalate, polyamide, ABS resin, acetate plastic and the like. included.

On the other hand, it is not necessary to use a transparent resin as the thermoplastic resin constituting the extension, but it is preferable to use the same material in terms of adhesiveness, moldability, and the like. A pigment, a colorant, and the like may be added to the transparent resin so that opacity or translucency and a color tone similar to those of a natural nail can be obtained.

The extension does not necessarily need to be entirely composed of only an opaque or translucent material, but if it is visually opaque or translucent, it is structurally compounded with a transparent material. May be used.

In order to obtain a transparent, opaque or translucent two-color structure of the artificial nail of the present invention, a normal two-color molding method or an insert molding method can be employed. It is preferable to adopt the method. in this case,
It can take various forms as shown in a, b, c, d, e, f of FIG.

In FIG. 5A, the boundary between the bonding portion 5 and the extension portion 6 is
It is inclined. Next, in FIG. 3B, the boundary between the bonding portion 5 and the extension portion 6 has a stepped shape. Next, c in FIG.
The thickness of the adhesive part 5 and the extension part 6 is substantially the same, and the upper half of the extension part 6 is transparent, and the lower half is opaque or translucent. In FIG. 4D, a transparent portion having the same thickness as that of the adhesive portion 5 is also present in the extension portion 6, and there is an opaque or translucent portion below the transparent portion of the extension portion 6. Further, there are also possible forms shown by e and f in FIG.

Also, a two-color structure can be obtained by making the surface of the mold where the transparent portion is molded a mirror finish and the surface of the mold where the opaque portion is molded a matte finish. It is.

Further, the transparent part and the opaque part are separately formed,
Various methods can be adopted, such as a method of bonding later, or a method of sandwiching an opaque film between two sheets formed of a transparent material to form the entire shape of the artificial nail.

The thickness of the artificial nail of the present invention varies depending on the strength, flexibility and the like of the plastic used.
It is preferably 0 mm, and within this range, practically sufficient strength and a practically uncomfortable feeling of wearing can be obtained.

Next, a method for forming an artificial nail will be described. The two-color molding method includes a core rotation method, a core back method,
There are several methods such as a cavity slide method and a stripper plate rotation method. However, it is preferable to adopt the core rotation method from the viewpoint of easy mold design.

In the core rotation method, a primary molded product is attached to a mold core, the core is rotated, and secondary molding is performed by a secondary mold.

Next, a case where an artificial nail shown in FIG. 6D of the present invention is molded by using a two-color injection molding machine of a core rotation system is described.
7 to 14 will be described.

In these figures, 7 is a fixed platen,
Numerals 8 and 9 are provided on the rear and front portions of the fixed platen 7.
An opaque or translucent material is injected from the primary injection device 8, and a transparent material is injected from the secondary injection device 9. Reference numeral 10 denotes a fixed mold held by the fixed platen 7, and reference numerals 11 and 12 denote first and second cavities having different shapes formed at the rear and front portions of the fixed mold 10, respectively. For molding a translucent material, the second cavity 12 is used for molding a transparent material.

Reference numeral 13 denotes a movable platen, 14 denotes a mold reversing device provided on the movable platen 13, and 15 denotes a mold reversing device 1.
The movable molds 16 and 17 are a first core and a second core, and the two cores 16 and 17 are exactly the same in shape and dimensions. And the first core 16 is moved to the position of the second core 17 and the second core 17 is moved to the position of the first core 16 by the rotation of the mold reversing device 14 by 180 degrees. And
By moving the movable platen 13 to the right, the two dies 10,
15 are joined, and both cores 16, 17 are joined to both cavities 11,
12.

Then, the movable platen 13 is moved away from the fixed platen 7 as shown in FIG.
Moves to the right, and as shown in FIG.
Join.

Next, as shown in FIG. 9, an opaque or translucent material is injected from the primary injection device 8 into a mold formed by the first cavity 11 and the first core 16, and thereafter, as shown in FIG. As shown in FIG. 10, the movable platen 13 moves to the left, the one-color molded product 18 remains attached to the first core 16, and only the sprue runner 19 is protruded and removed.

Next, the mold reversing device 14 shown in FIG.
As shown in FIG. 12, the movable mold 15 is rotated by 180 degrees, the movable platen 13 moves rightward, and as shown in FIG. 12, the two molds 10, 15 are joined.

Then, as shown in FIG. 13, a transparent material is injected from the secondary injection device 9 into a mold formed by the second cavity 12 and the first core 16, and at the same time, the primary injection device 8 Opaque or translucent material is injected into a mold formed by the first cavity 11 and the second core 17,
Thereafter, as shown in FIG. 14, the movable platen 13 moves to the left, and the same one-color molded product 18 as described above is moved to the second core 17.
, And the other two-color molded product 20, its sprue / runner 21, and the same sprue / runner 19 as above are protruded.

Thereafter, the processes shown in FIGS. 11 to 14 are repeatedly performed, and a two-color product 20 is obtained.

[0065]

Since the present invention is configured as described above, it has the following effects. The artificial nail according to the present invention comprises a transparent adhesive portion that adheres to the natural nail, and an opaque or translucent extension similar to the toe that extends the toe of the natural nail, and the portion that adheres to the natural nail is transparent. Yes, since the part that extends the toe of a natural nail is opaque or translucent, similar to the toe of a natural nail, if the adhesive part is attached to the natural nail using a transparent adhesive, the adhesive part of the artificial nail will be It has a color tone that has the same weak redness as natural nails by penetrating the base, so imitation feeling and unnatural feeling associated with artificial nail installation are eliminated, and it is possible to adhere to a wide range of natural nails, The bonding operation is extremely easy, and the bonding strength is greatly improved.

Further, since the extended portion also has a color tone similar to that of a natural nail, there is no imitation on the whole as seen in a conventional artificial nail, and there is no need to dare to apply a nail color.

[Brief description of the drawings]

1A and 1B are a plan view and a left side view of a mounted state according to a first embodiment of the present invention.

2 (a) and 2 (b) are left side views of Embodiments 2 and 3. FIG.

FIGS. 3A and 3B are plan views of other mounting states, respectively.

FIGS. 4A and 4B are plan views of still another mounted state, respectively.

FIG. 5 is a left side view of a part of the fourth embodiment.

FIG. 6 is a left side view of a, b, c, d, e, and f of a part of the fifth, sixth, seventh, eighth, ninth, and tenth embodiments.

FIG. 7 is a cut-away plan view of the molding process 1 according to the present invention.

FIG. 8 is a cut-away plan view of a molding process 2;

FIG. 9 is a cut-away plan view of a molding process 3;

FIG. 10 is a cut-away plan view of a molding step 4;

FIG. 11 is a cut-away plan view of a forming step 5;

FIG. 12 is a cut-away plan view of a forming step 6;

FIG. 13 is a cut-away plan view of a molding process 7;

FIG. 14 is a cut-away plan view of the forming process 8;

[Explanation of symbols]

 2 Natural nail 3 Toe 4 Artificial nail 5 Adhesive part 6 Extension part

Claims (4)

(57) [Claims] 1. An artificial nail made of plastic which adheres to a natural nail of a person and extends the toe of the natural nail. A transparent adhesive portion which adheres to the natural nail, and an opaque similar to the toe which extends the toe. Alternatively, an artificial nail comprising a translucent extension. 2. An artificial nail made of plastic for bonding to a natural nail of a person and extending the tip of the natural nail, comprising an adhesive portion for bonding to the natural nail and an extension for extending the tip of the nail. And the area from 0.1 to 5.0 mm rearward from the tip of the adhesive part is opaque or translucent, similar to the toe of a natural nail,
An artificial nail characterized by being transparent outside the above-mentioned range of an adhesion part. 3. The artificial nail according to claim 1, wherein the thickness of the bonding portion is gradually reduced toward the rear end. 4. The artificial nail according to claim 1, wherein the thickness of the bonding portion is smaller than the thickness of the extension portion.