Nail brushes and the brush head of nail brushes

Abstract

The present invention provides a nail brush and a brush head for a nail brush that make it easy to spread gel so that a large amount of gel remains on the designated area of ​​the nail. [Solution] The nail brush 1 is a nail brush 1 for applying gel used in the formation of artificial nails. The nail brush 1 comprises a rod-shaped shaft portion 2 and a brush portion 3 attached to the tip of the shaft portion 2. The brush portion 3 is composed of a bundle of bristles 4 bound together in a flat shape. The tip surface of the bundle of bristles 4 is located in the center of the width direction D1 of the bundle of bristles 4 and has a recessed area 40 that is recessed towards the root side of the bundle of bristles 4. The bundle of bristles 4 includes a central bundle of bristles 5 that constitutes the recessed area 40 and an end bundle of bristles 6 that is located outside the central bundle of bristles 5 in the width direction D1.

Description

Technical Field

[0001] The present disclosure relates to a nail brush and the nib of a nail brush, and more particularly to a nail brush for applying a gel used for forming artificial nails and the nib of a nail brush.

Background Art

[0002] Patent Document 1 describes a nail brush for applying a gel used for forming artificial nails. The tip of this nail brush is provided with a flat surface.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in order to form a beautiful and strong artificial nail, it is necessary to apply the gel so as to form an arch where the portion slightly closer to the root from the center of the human nail is the highest part.

[0005] However, in the nail brush described in Patent Document 1, since the tip of the brush is flat, the gel placed on the nail is spread flat by the tip of the brush. Therefore, with this nail brush, it is difficult to spread the gel so that a large amount of gel remains at a predetermined position on the nail (that is, a position slightly closer to the root from the center), and it is difficult to make the gel on the nail into an arch shape.

[0006] In view of the above circumstances, an object of the present disclosure is to provide a nail brush and a nib of a nail brush that are easy to spread the gel so that a large amount of gel remains at a predetermined position on the nail.

Means for Solving the Problems

[0007] To achieve the above objective, a nail brush according to one embodiment of the present disclosure is a nail brush for applying gel used in the formation of artificial nails. The nail brush comprises a rod-shaped shaft portion and a brush portion attached to the tip of the shaft portion. The brush portion is composed of a bundle of bristles bound together in a flattened shape. The tip surface of the bundle of bristles is located in the center in the width direction of the bundle of bristles and has a recessed area on the root side of the bundle of bristles. The bundle of bristles includes a central bundle of bristles that constitutes the recess and an end bundle of bristles located further outward in the width direction than the central bundle of bristles.

[0008] Furthermore, the brush portion of a nail brush according to one embodiment of the present disclosure is the brush portion of a nail brush for applying gel used in the formation of artificial nails. The brush portion is composed of a bundle of bristles bound together in a flattened shape. The tip surface of the bundle of bristles is located in the center in the width direction of the bundle of bristles and has a recessed area on the root side of the bundle of bristles. The bundle of bristles includes a central bundle of bristles that constitutes the recess and an end bundle of bristles located further outward in the width direction than the central bundle of bristles. [Effects of the Invention]

[0009] A nail brush and the brush portion of a nail brush according to one embodiment of the present disclosure are designed to easily spread gel so that a large amount of gel remains on a predetermined area of ​​the nail. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a front view showing the brush portion of a nail brush according to Embodiment 1 of the present disclosure. [Figure 2] Figure 2 is a front view showing the nail brush mentioned above. [Figure 3] Figure 3 is a schematic front view showing the brush head of the same brush. [Figure 4] Figure 4 is a schematic plan view showing the brush head of the same brush. [Figure 5] Figure 5 shows how to apply gel to the center of the nail using the same nail brush as shown above. [Figure 6]Figure 6 shows how to apply gel to one end of a nail in the width direction using the same nail brush as above. [Figure 7] Figure 7 shows how to apply gel to the other end of the nail in the width direction using the same nail brush as above. [Figure 8] Figure 8 is a schematic front view showing modification 1 of the brush head shown above. [Figure 9] Figure 9 is a schematic front view showing modification 2 of the brush head shown above. [Figure 10] Figure 10 is a schematic front view showing modification 3 of the brush head shown above. [Figure 11] Figure 11 is a front view showing the brush portion of a nail brush according to Embodiment 2 of the present disclosure. [Figure 12] Figure 12 is a schematic front view showing the brush head of the same brush. [Figure 13] Figure 13 is a schematic plan view showing the brush head of the same brush. [Figure 14] Figure 14 shows how to apply gel to the center of the nail using the same nail brush. [Figure 15] Figure 15 shows how to apply gel to one end of a nail in the width direction using the same nail brush as above. [Figure 16] Figure 16 shows how to apply gel to the other end of the nail in the width direction using the same nail brush as above. [Modes for carrying out the invention]

[0011] (Embodiment 1) 1. Overview As shown in FIGS. 1, 2, and 5, the nail brush 1 of Embodiment 1 is a nail brush 1 for applying the gel 11 used for forming artificial nails. The nail brush 1 includes a rod-shaped shaft portion 2 and a brush portion 3 attached to the tip of the shaft portion 2. The brush portion 3 is composed of a tuft of hair 4 bound in a flat shape. The tip surface of the tuft of hair 4 is located at the center of the width direction D1 of the tuft of hair 4 and has a recess 40 recessed toward the root side of the tuft of hair 4. The tuft of hair 4 includes a central tuft portion 5 constituting the recess 40 and an end tuft portion 6 located outside the width direction D1 from the central tuft portion 5.

[0012] In the nail brush 1 of Embodiment 1 having the above configuration, when the gel 11 is placed on the human nail 10 and the gel 11 is spread with the brush portion 3, it is easy to form a gap between the recess 40 (that is, the tips of the hairs of the central tuft portion 5) of the tip surface of the tuft of hair 4 and the nail 10, and it is easy to leave the gel 11 there. Therefore, with the nail brush 1 of Embodiment 1, it is easy to spread the gel 11 so that a large amount of the gel 11 remains at a predetermined location on the nail 10.

[0013] 2. Details Subsequently, the nail brush 1 of Embodiment 1 shown in FIGS. 1 to 7 will be described in more detail. The nail brush 1 is a nail brush 1 for applying the gel 11 used for forming artificial nails, as shown in FIGS. 5 to 7.

[0014] In this embodiment, the nail brush 1 is used to apply the gel 11 to the human nail 10. By curing the gel 11 applied to the nail 10, an artificial nail is formed on the nail 10. When the artificial nail is viewed in the width direction of the human nail 10, an arch in which a portion slightly closer to the root from the center of the nail 10 is the highest portion is formed, and when the nail 10 is viewed from the tip side to the root side, an arch in which the central portion in the width direction of the human nail 10 is the highest portion is formed, which is said to be a beautiful and strong form.

[0015] Gel 11 is a photocurable resin. Gel 11 hardens when exposed to light from a nail lamp. Examples of nail lamps include UV lights, LED lights, and CCFL (Cold Cathode Fluorescent Lamp) lights.

[0016] As shown in Figure 2, the nail brush 1 comprises a rod-shaped shaft portion 2 and a brush portion 3 attached to the tip of the shaft portion 2. As shown in Figure 4, the brush portion 3 is composed of bundles of bristles 4 bound together in a flattened shape.

[0017] As shown in Figures 1 and 3, the tip surface of the hair bundle 4 is located in the center of the width direction D1 of the hair bundle 4 and has a recessed area 40 that is recessed towards the root side of the hair bundle 4. The hair bundle 4 includes a central hair bundle portion 5 that constitutes the recessed area 40 and an end hair bundle portion 6 that is located further outward in the width direction D1 than the central hair bundle portion 5. The tips of the hairs of the central hair bundle portion 5 constitute the recessed area 40.

[0018] In the following, the width direction D1 of the bristle bundle 4 will be described as the left-right direction, the thickness direction D2 of the bristle bundle 4 will be described as the front-back direction, and the length direction D3 of the bristle bundle 4 will be described as the up-down direction, as necessary. The length direction D3 of the bristle bundle 4 is the axial direction along the central axis of the rod-shaped shaft portion 2. The side on which the bristle bundle 4 is located relative to the shaft portion 2 is considered the upper side, and the opposite side is considered the lower side. The up-down, left-right, front-back directions mentioned here do not define the orientation of the nail brush 1 when using it.

[0019] As shown in Figure 2, in this embodiment, the shaft portion 2 has a round rod-shaped shaft portion body 20 and a binding component 21 attached to one axial end (specifically the upper end) of the shaft portion body 20 for binding the hair bundle 4. The shaft portion body 20 is made of wood, bamboo, or resin. The binding component 21 is made of metal.

[0020] The binding component 21 is cylindrical. The upper end of the binding component 21 is flattened by pressing, with the root portion of the hair bundle 4 positioned inward. As a result, the hair bundle 4 is flattened and bound by the binding component 21. The lower end of the binding component 21 is attached by fitting it onto the upper end of the shaft body 20.

[0021] As shown in Figures 1 and 3, the tip surface (i.e., the upper end surface) of the hair bundle 4 is located in the center of the width direction D1 of the hair bundle 4 and has a recessed area 40 on the root side of the hair bundle 4. In this embodiment, each of the numerous hairs constituting the hair bundle 4 has a tapered tip, that is, the tip is not cut. The hair bundle 4 is made up of animal hair such as horse, goat, squirrel, weasel, raccoon dog, or deer. The hair bundle 4 may also be made up of artificial hair.

[0022] The hair bundle 4 includes a pair of end hair bundles 6 positioned to sandwich the central hair bundle 5 in the width direction D1. The pair of end hair bundles 6 consist of an end hair bundle 6a located to the left of the central hair bundle 5 and an end hair bundle 6b located to the right of the central hair bundle 5.

[0023] As shown in Figure 4, the central bristle bundle 5 has a more sparse arrangement of bristles than the end bristle bundles 6 (i.e., end bristle bundles 6a and 6b). In other words, the central bristle bundle 5 has fewer bristles per unit volume than the end bristle bundles 6. As a result, the writing pressure required for the central bristle bundle 5 is lower than that required for the end bristle bundles 6.

[0024] As shown in Figure 3, the maximum depth L1 of the recess 40 is 1.0 mm in this embodiment. Preferably, the maximum depth L1 is between 0.2 mm and 3.0 mm. Having the maximum depth L1 within this range makes it easier to leave the amount of gel 11 necessary to form an arch on the nail 10 when spreading the gel 11 with the brush part 3. The recess 40 is recessed in a convex arc shape on the root side (i.e., the lower side) of the bristle bundle 4.

[0025] The length L2 in the width direction D1 of the end hair bundle portion 6 (i.e., end hair bundle portions 6a, 6b) is between 1 / 10 and 1 / 5 of the length L3 in the width direction D1 of the hair bundle 4. In this embodiment, the length L3 is approximately 5.5 mm, and the length L2 is approximately 1 mm. The length L3 in the width direction D1 of the hair bundle 4 is less than or equal to the length L4 in the width direction of the claw 10, as shown in Figure 5, and preferably is at least half of the length L4. The depth L1 and lengths L2, L3 described above are the lengths when no load is applied to the hair bundle 4, that is, when the hair bundle 4 is not pressing against the claw 10.

[0026] As shown in Figures 1 and 3, the hairs in the end hair bundles 6 (i.e., end hair bundles 6a and 6b) are shorter the closer they are to the end in the width direction D1. That is, in the left end hair bundle 6a, the hairs are shorter closer to the left end, and the hairs gradually get shorter from the right end to the left end. Similarly, in the right end hair bundle 6b, the hairs are shorter closer to the right end, and the hairs gradually get shorter from the left end to the right end. In this embodiment, the difference L5 between the length of the longest hair and the length of the shortest hair in the end hair bundle 6 is longer than the maximum depth L1 of the recess 40. Note that the difference L5 may be the same as the maximum depth L1, or it may be shorter than the maximum depth L1.

[0027] The left end tuft 6a and the right end tuft 6b are arranged symmetrically to each other. Note that the term "symmetrical" here is not limited to strict line symmetry.

[0028] In the central hair bundle 5, the hairs in the center in the left-right direction are the shortest, and the hairs closer to the ends in the left-right direction are longer. The length of the hairs in the center of the central hair bundle 5 in the left-right direction is longer than the length of the hairs at the ends of the end hair bundle 6 in the width direction D1 (i.e., the shortest hairs).

[0029] Therefore, the left end of the central bristle bundle 5 and the left end bristle bundle 6a have the longest hairs located in the center of their width direction D1 (i.e., the left end of the central bristle bundle 5), with the hairs closer to both ends of the width direction D1 being shorter, forming a shape like a tapered fine brush. Similarly, the right end of the central bristle bundle 5 and the right end bristle bundle 6b have the longest hairs located in the center of their width direction D1 (i.e., the right end of the central bristle bundle 5), with the hairs closer to both ends of the width direction D1 being shorter, forming a shape like a tapered fine brush.

[0030] In this embodiment, the brush portion 3 (i.e., the bristle bundle 4) is made by hand. The brush portion 3 is formed by tying the root ends of numerous bristles together with thread, with the length and position in the width direction D1 and length direction D3 of each bristles aligned so that the tips of the bristles form the tip surfaces shown in Figures 1 and 3, and then flattening the root ends of this bristle bundle with a binding component 21. In this embodiment, the brush portion 3 and the nail brush 1 are formed using the manufacturing method of Kumano brushes (registered trademark).

[0031] 3.How to use Next, we will describe an example of a method for forming an artificial nail by applying gel 11 to a human nail 10 using the nail brush 1 described above.

[0032] First, the brush tip 3 (i.e., the bristle bundle 4) of the nail brush 1 is dipped into the gel 11 in the container, and the gel is scooped up with the brush tip 3. More specifically, the portion of the bristle bundle 4 from the tip to about one-third of its length is dipped into the gel 11 in the container, and the gel 11 is scooped up. At this time, since the bristles in the central bristle bundle 5 are more sparsely arranged than those in the end bristle bundle 6, more gel 11 can be scooped up compared to when the density of the bristles in the central bristle bundle 5 and the end bristle bundle 6 are the same.

[0033] Next, as shown in Figure 5, place the gel 11 scooped up with the brush 3 onto the center of the width direction of the nail 10, and slightly closer to the base of the nail 10 from the center in the length direction. Then, move the brush 3 towards the base of the nail 10 to spread the gel 11 down to the base of the nail 10.

[0034] Next, as shown in Figure 6, place the brush part 3 against the base of one end of the nail 10 in the width direction (specifically the right end), and spread the gel 11 from the base of one end of the nail 10 in the width direction (specifically the right end) to the tip of the nail. At this time, move the brush part 3 so that the right end bristle bundle 6b of the brush part 3 and the right end of the central bristle bundle 5 are aligned with one end of the nail 10 in the width direction, and spread the gel 11.

[0035] Next, as shown in Figure 7, place the brush part 3 against the base of the other end (specifically the left end) in the width direction of the nail, and spread the gel 11 from the base of the other end (specifically the left end) of the nail 10 to the tip. At this time, move the brush part 3 so that the left end bristle bundle 6a of the brush part 3 and the left end of the central bristle bundle 5 are aligned with the other end of the nail 10 in the width direction, and spread the gel 11.

[0036] Next, use the brush 3 to spread the gel 11 onto the areas of the nail 10 that have not yet been coated with gel 11, thereby spreading the gel 11 over the entire nail 10.

[0037] Next, with the width direction D1 of the brush part 3 aligned with the width direction of the nail 10, the tip surface of the brush part 3 is placed on the part of the center of the width direction of the nail 10 near the base, and the tip surface of the brush part 3 is moved to the tip of the nail 10. At this time, since the tip surface of the center of the width direction D1 of the bristle bundle 4 is a recess 40, the gel 11 can be spread from the base to the tip of the nail 10 with a large amount of gel 11 remaining in the center of the width direction of the nail 10.

[0038] Next, move the bristle bundle 6 at one end of the brush part 3 in the width direction D1 and the adjacent central bristle bundle 5 along the tip of the nail 10 to adjust the thickness of the gel 11 at the tip of the nail 10.

[0039] Next, the surface of the gel 11 on the nail 10 becomes smooth through leveling over time (more specifically, the phenomenon of the surface naturally becoming flat due to surface tension).

[0040] Next, a nail light is shone on the gel 11 on the nail 10 to cure the gel 11 and form an artificial nail.

[0041] 4. Effects As described above, the nail brush 1 has a recess 40 in the center of the width direction D1 of the tip surface of the bristle bundle 4. Therefore, when applying gel 11 to a person's nail 10 and spreading the gel 11 with the brush part 3, it is easy to create a gap between the recess 40 on the tip surface of the bristle bundle 4 (i.e., the tip of the bristles of the central bristle bundle part 5) and the nail 10, making it easy to leave gel 11 in this gap. For this reason, the nail brush 1 makes it easy to spread the gel 11 so that a large amount of gel 11 remains in a predetermined area of ​​the nail 10.

[0042] Furthermore, in the nail brush 1, the central bristle bundle 5 has a more sparse arrangement of bristles than the end bristle bundles 6, making it easier to reduce the pressure applied to the center of the bristle bundle 4 in the width direction D1 when spreading the gel 11 with the brush part 3. Therefore, with the nail brush 1, it is easier to leave gel 11 in the areas where the center of the bristle bundle 4 in the width direction D1 passes, making it easier to spread the gel 11 so that more gel 11 remains in the designated area of ​​the nail 10.

[0043] Furthermore, in the nail brush 1, a pair of end bristle bundles 6a and 6b are positioned so as to sandwich the central bristle bundle 5 from both sides in the width direction D1. Therefore, in the nail brush 1, when spreading the gel 11 with the brush part 3, the pair of end bristle bundles 6a and 6b make it easier to prevent the gel 11 between them from spreading outwards in the width direction D1. Consequently, in the nail brush 1, it is easier to leave gel 11 in the area where the central part of the bristle bundle 4 in the width direction D1 passes, and to spread the gel 11 so that more gel 11 remains in the designated area of ​​the nail 10.

[0044] Furthermore, in the nail brush 1, the central bristle bundle 5 has a more sparse arrangement of bristles than the end bristle bundles 6a and 6b. Therefore, compared to a case where the density of bristles in the central bristle bundle 5 and the end bristle bundles 6a and 6b is the same, it is easier to scoop up more gel 11 from the container.

[0045] Furthermore, in the nail brush 1, the ends of the bristle bundle 4 in the width direction D1 are longer and tapered like a fine brush, with the bristles closer to the center of the width direction D1 (i.e., the ends of the width direction D1 of the central bristle bundle 5) being longer. Therefore, when moving the ends of the bristle bundle 4 in the width direction D1 along the edge of the nail 10 with the nail brush 1, the bristles do not spread out easily, making it easy to apply the gel 11 to the edge of the nail 10 without the gel 11 spilling out from the edge of the nail 10.

[0046] Furthermore, with nail brush 1, the tips of each bristle bundle 4 are tapered, making it easy to apply gel 11 to the edges of the nail 10.

[0047] 5. Variations Next, we will describe some variations of the nail brush 1 of Embodiment 1 described above. The variations described below can be combined as appropriate.

[0048] The brush portion 3 of the nail brush 1 may not have the hairs of the pair of end bristle bundles 6a and 6b being shorter towards the end in the width direction D1, as shown in the modified example 1 in Figure 8. The length of the hairs may be constant along the width direction D1. In other words, the tip surfaces of the pair of end bristle bundles 6a and 6b may be flat.

[0049] Furthermore, the brush portion 3 of the nail brush 1 may have a recess 40 that is convex in a V-shape towards the base of the bristle bundle 4, as shown in Modification 2 in Figure 9. Alternatively, the brush portion 3 of the nail brush 1 may have a recess 40 that is convex in a U-shape towards the base of the bristle bundle 4, as shown in Modification 3 in Figure 10. The maximum depth L1 of the recess 40 in Modifications 2 and 3 is, for example, 1.0 mm, and preferably 0.2 mm or more and 3.0 mm or less.

[0050] In the nail brush 1 of the modified examples 1 to 3, when applying gel 11 to a person's nail 10 and spreading the gel 11 with the brush part 3, it is easy to form a gap between the recessed part 40 on the tip surface of the bristle bundle 4 and the nail 10, making it easy to leave gel 11 in this gap.

[0051] The central hair bundle 5 may have the same degree of density as the end hair bundle 6, or the hair may be more densely arranged than in the end hair bundle 6.

[0052] The maximum depth L1 of the recess 40 is not limited to 0.2 mm or more and 3.0 mm or less, but may be in other ranges.

[0053] The shape of the recess 40 is not limited to a convex arc, V-shape, or U-shape on the root side of the hair bundle 4, but may be any other shape. The bottom surface of the recess 40 is not limited to a curved surface, a flat surface, or a combination thereof, but may be an uneven surface. In other words, the numerous hairs constituting the central hair bundle 5 do not need to be of the same length so that their tips form an uneven surface. Similarly, the numerous hairs constituting the end hair bundle 6 do not need to be of the same length so that their tips form an uneven surface.

[0054] The length L2 of the width direction D1 of the end hair bundle portion 6 is not limited to 1 / 10 or more and 1 / 5 or less of the length L3 of the width direction D1 of the hair bundle 4, but may be in other ranges.

[0055] Each hair constituting the hair bundle 4 is not limited to a tapered shape; its tip may be cut. In other words, the brush part 3 does not have to be formed by hand, but may be formed by machine. When manufactured by machine, for example, the brush part 3 may be formed by flattening a large number of hairs of a constant or nearly constant length using a binding component 21 to form a hair bundle with a flat tip surface, and then cutting the tip of this hair bundle with a cutting tool to form the shape shown in Figures 1 and 3. In this case, the manufacturing time of the brush part 3 can be shortened, and the manufacturing cost of the brush part 3 can be reduced.

[0056] The shaft portion 2 may not have a binding component 21 and may consist only of the shaft portion body 20. In this case, the brush portion 3 may be attached to the tip of the shaft portion body 20 by embedding or other means.

[0057] The object to which the gel 11 is applied with the nail brush 1 is not limited to a human nail 10, but may be a model that mimics a human nail 10. In this case, after applying the gel 11 to the model with the nail brush 1 and curing it to form an artificial nail, the artificial nail may be removed from the model and attached to the human nail 10 with an adhesive or the like.

[0058] The central bristle bundle 5 may be composed of softer bristles than the end bristle bundle 6, thereby reducing the pressure applied to the central bristle bundle 5. In this case, the central bristle bundle 5 may have the same degree of density as the end bristle bundle 6, or the bristles may be more densely arranged than in the end bristle bundle 6.

[0059] (Embodiment 2) Next, we will describe the nail brush 1 of Embodiment 2 shown in Figures 11 to 16. In the following description, we will focus on the configurations of the nail brush 1 of Embodiment 2 that differ from those of the nail brush 1 of Embodiment 1, and will omit the description of similar configurations. Furthermore, for the nail brush 1 of Embodiment 2, components corresponding to those of the nail brush 1 of Embodiment 1 will be denoted by the same reference numerals.

[0060] As shown in Figures 11 and 12, in the nail brush 1 of Embodiment 2, the bristle bundle 4 includes a central bristle bundle portion 5 and an end bristle bundle portion 6 located only on one side in the width direction D1 of the central bristle bundle portion 5. The central bristle bundle portion 5 is located in the entire remaining portion of the bristle bundle 4 except for one end in the width direction D1.

[0061] In this embodiment, the right end of the hair bundle 4 is the end hair bundle portion 6. The entire remaining portion of the hair bundle 4, excluding the right end, is the central hair bundle portion 5. As shown in Figure 13, the hairs in the central hair bundle portion 5 are more sparsely arranged than those in the end hair bundle portion 6.

[0062] As shown in Figures 11 and 12, the recess 40 is provided on the entire remaining portion of the tip surface of the hair bundle 4, excluding the rightmost end. The central hair bundle portion 5 is longer towards the hairs closer to the end hair bundle portion 6 (i.e., towards the right). The bottom surface of the recess 40 is arc-shaped, and more specifically, it is arc-shaped along the widthwise curve of the surface of the nail 10.

[0063] In the nail brush 1 of Embodiment 2, as shown in Figures 14 to 16, gel 11 can be applied to a person's nail 10, similar to the nail brush 1 of Embodiment 1.

[0064] In the nail brush 1 of Embodiment 2, as shown in Figures 15 and 16, the position of the end bristle bundle portion 6 in the bristle bundle 4 can be switched by using the nail brush 1 inverted horizontally. Therefore, in the nail brush 1 of Embodiment 2, the gel 11 can be applied to one end and the other end of the nail 10 in the width direction by the fine brush-like portion of the bristle bundle 4 that includes the end bristle bundle portion 6.

[0065] Furthermore, in the nail brush 1 of Embodiment 2, as shown in Figure 14, when the width direction D1 of the brush part 3 is aligned with the width direction of the nail 10, and the tip surface of the brush part 3 is applied to the area near the base in the center of the width direction of the nail 10, and the tip surface of the brush part 3 is moved to the tip of the nail 10, a large amount of gel 11 can be left in a predetermined area in the width direction of the nail 10.

[0066] Furthermore, in the nail brush 1 of Embodiment 2, a recess 40 is provided from the center of the width direction D1 of the tip surface of the bristle bundle 4 to one end, making it easier to spread the gel 11 on wide nails 10 such as the thumb, so that more gel 11 remains in one area.

[0067] The nail brush 1 of Embodiment 2 described above can be appropriately combined with modified versions of the nail brush 1 of Embodiment 1 described above.

[0068] (summary) As described above in Embodiments 1 and 2 and their modified forms, the nail brush (1) of the first embodiment has the following configuration.

[0069] The nail brush (1) of the first embodiment is a nail brush (1) for applying gel (11) used for forming artificial nails. The nail brush (1) comprises a rod-shaped shaft portion (2) and a brush portion (3) attached to the tip of the shaft portion (2). The brush portion (3) is composed of bristle bundles (4) bound together in a flattened shape. The tip surface of the bristle bundle (4) is located in the center in the width direction (D1) of the bristle bundle (4) and has a recessed area (40) that is recessed towards the root side of the bristle bundle (4). The bristle bundle (4) includes a central bristle bundle portion (5) that constitutes the recessed area (40) and an end bristle bundle portion (6) located further outward in the width direction (D1) than the central bristle bundle portion (5).

[0070] In the nail brush (1) of the first embodiment having the above configuration, when applying gel (11) to a person's nail (10) and spreading the gel (11) with the brush part (3), it is easy to form a gap between the concave part (40) on the tip surface of the bristle bundle (4) (i.e., the tip of the bristles of the central bristle bundle part (5)) and the nail (10), making it easy to leave gel (11) in this gap. Therefore, in the nail brush (1) of the first embodiment, it is easy to spread the gel (11) so that a large amount of gel (11) remains in a predetermined area of ​​the nail (10).

[0071] Furthermore, as described above in embodiments 1 and 2 and their variations, the nail brush (1) of the second embodiment additionally includes the following configuration in addition to the configuration of the first embodiment.

[0072] In the second embodiment of the nail brush (1), the central bristle bundle (5) has bristles that are more sparsely arranged than the end bristle bundles (6).

[0073] In the second embodiment of the nail brush (1) having the above configuration, when spreading the gel on the nail (10) with the brush part (3), it is easier to reduce the pressure applied to the central bristle section (5) compared to the pressure applied to the end bristle section (6), making it easier to leave more gel (11) between the central bristle section (5) and the nail. Also, in the second embodiment of the nail brush (1), when scooping the gel (11) from the container with the brush part (3), it is easier to pick up the gel (11) with the central bristle section (5), making it easier to increase the amount of gel (11) that can be scooped.

[0074] Furthermore, as described above in embodiments 1 and 2 and their modifications, the nail brush (1) of the third embodiment additionally includes the following configuration in addition to the configuration of the first or second embodiment.

[0075] In the third embodiment of the nail brush (1), the maximum depth (L1) of the recess (40) is 0.2 mm or more and 3.0 mm or less.

[0076] In the third embodiment of the nail brush (1) having the above configuration, it is easy to spread the gel (11) so that only the necessary amount of gel (11) remains on a predetermined part of the nail (10).

[0077] Furthermore, as described above in embodiments 1 and 2 and their variations, the nail brush (1) of the fourth embodiment additionally includes the following configuration in addition to the configuration of any one of the first to third embodiments.

[0078] In the fourth embodiment of the nail brush (1), the recess (40) is concave in a convex arc shape towards the base.

[0079] In the fourth embodiment of the nail brush (1) having the above configuration, it is easier to make the upper surface of the gel (11) remaining in the center of the nail (10) into an arc shape, and it is easier to bring the shape of the gel (11) on the nail (10) closer to the ideal shape of an artificial nail.

[0080] Furthermore, as described above in embodiments 1 and 2 and their variations, the nail brush (1) of the fifth embodiment additionally includes the following configuration in addition to the configuration of any one of the first to fourth embodiments.

[0081] In the fifth embodiment of the nail brush (1), the length (L2) in the width direction (D1) of the end bristle bundle (6) is 1 / 10 or more and 1 / 5 or less of the length (L3) in the width direction (D1) of the bristle bundle (4).

[0082] In the fifth embodiment of the nail brush (1) having the above configuration, the length (L2) in the width direction (D1) of the end bristle bundle (6) can be secured to a certain extent, making it easier for the end bristle bundle (6) to prevent the gel (11) between the central bristle bundle (5) and the nail (10) from spreading outwards in the width direction (D1). Therefore, in the fifth embodiment of the nail brush (1), it is easier to leave more gel (11) between the central bristle bundle (5) and the nail (10). In addition, in the fifth embodiment of the nail brush (1), the length (D1) in the width direction (D1) of the end bristle bundle (6) can be secured to a certain extent, making it easier for the end bristle bundle (6) to spread the gel (11).

[0083] Furthermore, as described above in embodiments 1 and 2 and their variations, the nail brush (1) of the sixth embodiment additionally includes the following configuration in addition to the configuration of the fifth embodiment.

[0084] In the sixth embodiment of the nail brush (1), the bristles in the end bundle (6) are shorter in length the closer they are to the end in the width direction (D1).

[0085] In the sixth embodiment of the nail brush (1) having the above configuration, there is a recess (40) on the inside of the tip of the end bristle bundle (6) in the width direction (D1), and the bristles of the end bristle bundle (6) are shorter the closer they are to the end in the width direction (D1), so the end bristle bundle (6) tends to become a fine brush shape that is thinner towards the tip. Therefore, in the sixth embodiment of the nail brush (1), it is easy to spread the gel (11) along the edge of the nail (10) with the end bristle bundle (6).

[0086] Furthermore, as described above in embodiment (1) and its modified form, the seventh embodiment of the nail brush (1) additionally includes the following configuration in addition to the configuration of any one of the first to sixth embodiments.

[0087] In the seventh embodiment of the nail brush (1), the bristle bundle (4) includes a pair of end bristle bundles (6a, 6b) positioned to sandwich the central bristle bundle (5) in the width direction (D1).

[0088] In the seventh embodiment of the nail brush (1) having the above configuration, the pair of end bristle bundles (6a, 6b) make it easier to prevent the gel (11) between the central bristle bundle (5) and the nail (10) from spreading to both sides in the width direction (D1). Therefore, in the seventh embodiment of the nail brush (1), it is easier to leave gel (11) between the central bristle bundle (5) and the nail (10).

[0089] Furthermore, as described above in embodiment (2) and its modified form, the eighth embodiment of the nail brush (1) additionally includes the following configuration in addition to the configuration of any one of the first to sixth embodiments.

[0090] In the eighth embodiment of the nail brush (1), the bristle bundle (4) includes a central bristle bundle portion (5) and an end bristle bundle portion (6) located only on one side in the width direction (D1) of the central bristle bundle portion (5). The central bristle bundle portion (5) is located in the entire remaining portion of the bristle bundle (4) except for one end in the width direction (D1).

[0091] In the eighth embodiment of the nail brush (1) having the above configuration, the end bristle bundle (6) makes it easier to prevent the gel (11) between the central bristle bundle (5) and the nail (10) from spreading to one side in the width direction (D1). Therefore, in the eighth embodiment of the nail brush (1), it is easier to leave more gel (11) between the central bristle bundle (5) and the nail (10). In addition, in the eighth embodiment of the nail brush (1), it is easier to leave a wider area of ​​gel (11) between the central bristle bundle (5) and the nail (10) in the width direction (D1).

[0092] Furthermore, as described in embodiments 1 and 2 and their modified forms above, the brush portion (3) of the ninth embodiment of the nail brush (1) is the brush portion (3) of the nail brush (1) for applying gel (11) used for forming artificial nails. The brush portion (3) is composed of bristle bundles (4) bound together in a flattened shape. The tip surface of the bristle bundle (4) is located in the center in the width direction (D1) of the bristle bundle (4) and has a recessed area (40) on the root side of the bristle bundle (4). The bristle bundle (4) includes a central bristle bundle portion (5) that constitutes the recessed area (40) and an end bristle bundle portion (6) located further outward in the width direction (D1) than the central bristle bundle portion (5).

[0093] In the brush portion (3) of the ninth embodiment of the nail brush (1) having the above configuration, when applying gel (11) to a person's nail (10) and spreading the gel (11) with the brush portion (3), it is easy to form a gap between the concave surface (40) of the tip of the bristle bundle (4) (i.e., the tip of the bristles of the central bristle bundle (5)) and the nail (10), making it easy to leave gel (11) in this gap. Therefore, in the brush portion (3) of the ninth embodiment of the nail brush (1), it is easy to spread the gel (11) so that a large amount of gel (11) remains in a predetermined area of ​​the nail (10).

[0094] Although the present disclosure has been described above based on the embodiments shown in the attached drawings, the present disclosure is not limited to the above embodiments, and appropriate design modifications are possible within the scope intended by the present disclosure. [Explanation of Symbols]

[0095] 1 Nail brush 2. Shaft section 3 Brush part 4 strands of hair 40 recess 5. Central hair bundle 6. End hair bundle 6a End hair bundle 6b End hair bundle 11 Gel D1 width direction L1 Maximum depth L2 Length L3 Length

Claims

1. A nail brush for applying gel used in the formation of artificial nails, A rod-shaped shaft, The shaft portion is equipped with a brush portion attached to the tip of the shaft portion, The brush portion is composed of bundles of hair tied together in a flattened shape. The tip surface of the hair bundle is located in the center of the width direction of the hair bundle and has a recessed area on the root side of the hair bundle. The hair bundle is composed of a central hair bundle portion that constitutes the recess, and a pair of end hair bundle portions positioned to sandwich the central hair bundle portion in the width direction. In each of the pair of end hair bundles, the hairs closer to the end in the width direction are shorter in length. A nail brush characterized by its features.

2. A nail brush for applying gel used in the formation of artificial nails, A rod-shaped shaft, The shaft portion is equipped with a brush portion attached to the tip of the shaft portion, The brush portion is composed of bundles of hair tied together in a flattened shape. The tip surface of the hair bundle is located in the center of the width direction of the hair bundle and has a recessed area on the root side of the hair bundle. The hair bundle is composed of a central hair bundle portion that constitutes the recess, and a pair of end hair bundle portions positioned to sandwich the central hair bundle portion in the width direction. The tip surfaces of each of the pair of end hair bundles are flat. A nail brush characterized by its features.

3. In the central hair bundle portion, the hairs are arranged more sparsely than in each of the pair of end hair bundle portions. A nail brush according to feature 1 or 2.

4. The recess is concave in an arc shape that is convex toward the base side. A nail brush according to feature 1 or 2.

5. A brush head for a nail brush used to apply gel for forming artificial nails, The brush portion is composed of bundles of hair tied together in a flattened shape. The tip surface of the hair bundle is located in the center of the width direction of the hair bundle and has a recessed area on the root side of the hair bundle. The hair bundle is composed of a central hair bundle portion that constitutes the recess, and a pair of end hair bundle portions positioned to sandwich the central hair bundle portion in the width direction. In each of the pair of end hair bundles, the hairs closer to the end in the width direction are shorter in length. A brush head for nail polish characterized by the following features.

6. A brush head for a nail brush used to apply gel for forming artificial nails, The brush portion is composed of bundles of hair tied together in a flattened shape. The tip surface of the hair bundle is located in the center of the width direction of the hair bundle and has a recessed area on the root side of the hair bundle. The hair bundle is composed of a central hair bundle portion that constitutes the recess, and a pair of end hair bundle portions positioned to sandwich the central hair bundle portion in the width direction. The tip surfaces of each of the pair of end hair bundles are flat. A brush head for nail polish characterized by the following features.

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