JP2020081854A - Hair brush - Google Patents

Abstract

To provide a hair brush which can reduce damage to hair in a wet state in brushing.SOLUTION: A hair brush 10 includes a head part 12 having a brushing surface 13 where a rod-like protrusion is raised and a handle. The brushing surface 13 has a longitudinal direction X and a width direction Y perpendicular to the longitudinal direction. The hair brush 10 has a first protrusion area where first protrusions 15, 17 are provided in a manner to be independent from each other at intervals in a central part in the width direction Y and a second protrusion row where a plurality of second protrusions 16 that have a cross sectional area greater than that of the first protrusions 15, 17 and a length shorter than that of the first protrusions are formed in the longitudinal direction X on both sides with the first protrusion area in between in the width direction Y.SELECTED DRAWING: Figure 2

Description

The present invention relates to a hairbrush.

As a hairbrush used for caring for hair, one that has a row of projections on the brush surface with multiple projections arranged in one direction, and the length and thickness of the projections differ depending on the area of the brush surface or the row of projections. It has been known. For example, Patent Document 1 describes a hairbrush in which brush hairs with short bristle are arranged in a central region in a brush base, and brush hairs with long bristles are arranged in an outer peripheral region surrounding the central region at intervals. Has been done.

Further, in Patent Document 2, a hair treatment liquid holding material composed of a bunch of fine bristles in the center in the width direction, and a brush bristle transplanting row composed of brush hairs having a height higher than the fine hairs on both sides of the hair treatment liquid holding material. A hairbrush with and is described.

Further, Patent Document 3 describes a hairbrush that has two monofilaments folded in two and has a plurality of bristle rows in which two long and short bristle lines are arranged in one direction.

Further, in Patent Document 4, a plurality of combs in which a plurality of teeth are arranged in series in the longitudinal direction are combined, and the comb has a long tooth length at the center of the brush surface and is arranged outside the brush surface. A hairbrush with a short comb tooth length is described.

On the other hand, Patent Document 5 describes a hair brush in which a plurality of hair materials having a tapered shape are arranged in a predetermined array toward the tip, and the hair materials have the same length and the same thickness.

Japanese Utility Model Laid-Open No. 61-192730 Japanese Utility Model Publication No. 61-202239 JP, 2003-245131, A International Publication No. 2003/026457 U.S. Patent Application Publication No. 2018/0228277

After washing hair, when brushing wet hair with a hairbrush, it is desired to easily untangle the hairs and reduce damage to the hair due to brushing. Wet hair is easily caught by the protrusions of the hairbrush and may be brushed with excessive force, and is easily damaged. The hair brushes described in Patent Documents 1 to 5 do not consider damage to hair during brushing.

Therefore, an object of the present invention is to provide a hairbrush that can solve various problems of the conventional art.

The present invention is a hairbrush having a head portion having a brush surface on which rod-shaped projections are provided upright and a handle, wherein the brush surface has a longitudinal direction and a width direction orthogonal to the longitudinal direction, At the center portion in the width direction of the brush surface, the first protrusions have first protrusion regions that are provided independently from each other with a space between them, and the first protrusion regions in the width direction are provided. The present invention provides a hairbrush that has a plurality of second projection rows, each of which has a plurality of second projections having a larger cross-sectional area and a shorter length than the first projections, which are formed along the longitudinal direction on each of both sides to be sandwiched.

The hairbrush of the present invention can reduce damage to wet hair during brushing.

FIG. 1 is a perspective view of a hairbrush according to an embodiment of the present invention. FIG. 2 is a perspective view showing a brush surface of the hairbrush shown in FIG. FIG. 3 is a plan view schematically showing a region where the protrusions are provided upright in the hairbrush shown in FIG. 4 is a sectional view taken along line II-II of FIG. 2 (a sectional view taken along the width direction of the brush surface). FIG. 5 is a schematic diagram illustrating a method of measuring the bending rigidity of the protrusion. FIG. 6 is a plan view schematically showing the arrangement of the first protrusions shown in FIG. 7(a) to 7(c) are cross-sectional views for explaining the standing manner of the first protrusion according to the present invention. FIG. 8A and FIG. 8B are cross-sectional views along the longitudinal direction of the brush surface, which illustrate the standing manner of the second protrusion according to the present invention. FIG. 9 is a view corresponding to FIG. 4 of a hairbrush according to another embodiment of the present invention. FIG. 10 is a view corresponding to FIG. 4 of a hairbrush according to yet another embodiment of the present invention. FIG. 11 is a view corresponding to FIG. 4 of a hairbrush according to yet another embodiment of the present invention.

The present invention will be described below based on its preferred embodiments with reference to the drawings. FIG. 1 shows an embodiment of a hairbrush according to the present invention. The hairbrush 10 of this embodiment is a hairbrush used for brushing human hair, and as shown in FIGS. 1 and 2, includes a handle 12c and a head portion 12 having a brush surface 13. As shown in FIG. 2, a plurality of rod-shaped protrusions 15 to 17 are provided upright on the brush surface 13 of the head portion 12. Standing means being installed in a standing state. In the present embodiment, the brush surface 13 is attached to the brush base 13a in a state in which the brush base 13a is fitted into the head unit 12 so as to close the mounting opening 12b of the head unit 12 described later. It is a portion exposed from the opening 12b.

The hair brush 10 grips the handle 12c by hand when caring for the hair, and while moving the hair brush 10 from the root side of the hair toward the tip side of the hair, the plurality of protrusions 15 provided upright on the brush surface 13 are provided. Brush hair with ~17.

The brush surface 13 of the hair brush 10 has a longitudinal direction X and a width direction Y orthogonal to the longitudinal direction X. The longitudinal direction X of the brush surface 13 is a direction corresponding to the longitudinal direction of the handle 12c, and the width direction Y of the brush surface 13 is a direction orthogonal to the longitudinal direction X of the brush surface.
In the brush surface 13, the length of the brush surface 13 in the longitudinal direction X is equal to or greater than the length in the width direction Y, and normally, the length in the longitudinal direction X is longer than the length in the width direction Y as shown in FIG. Is preferred.

The hairbrush 10 has a first protrusion area A in which the first protrusions are provided in a state of being independent one by one at a distance from each other at the center of the brush surface 13 in the width direction Y. The hairbrush 10 of the present embodiment has two types of first protrusions 15 and 17 having different cross-sectional areas as the first protrusions. These first protrusions 15 and 17 have the same length. Hereinafter, among the first projections in the present embodiment, the projection having a smaller cross-sectional area is also referred to as a first small projection 15, and the projection having a larger cross-sectional area is also referred to as a first large projection 17. As shown in FIG. 3, the plurality of first protrusions 15 and 17 are provided independently from each other with a space between them. More specifically, the plurality of first protrusions 15 and 17 are scattered and arranged at intervals in the longitudinal direction X and the width direction Y. In the hairbrush 10 of the present embodiment, one projection is provided in the flock hole 18 provided in the brush surface 13.

The first protrusion region A is a region in which the above-described first protrusions 15 and 17 are provided with a space provided therebetween. In the first protrusion area A in the present embodiment, a plurality of first protrusions 15 and 17 are provided at intervals in the longitudinal direction X and the width direction Y, respectively. In the first protrusion region A, a plurality of first small protrusion rows J1 in which a plurality of first small protrusions are arranged in series in the longitudinal direction X are formed in the width direction Y. The plurality of first small projection rows J1 are arranged so as to be displaced in the longitudinal direction X such that the arrangement of the first small projections 15 in the first small projection row J1 is the same position every other row. The plurality of first small projection rows J1 may be arranged so as to be displaced in the longitudinal direction X such that the arrangement of the first small projections 15 in the first small projection row J1 is the same position every three rows. .. Further, in each of the first protrusion areas A, on each side in the width direction Y, one first large protrusion row J5 is formed outside the first small protrusion row J1 in the width direction Y.

As shown in FIG. 3, the hairbrush 10 has a second cross-sectional area that is larger than the first projections 15 and 17 and that is short on both sides of the brush surface 13 that sandwich the first projection region A in the width direction Y. The protrusion 16 has a plurality of second protrusion rows J3 formed along the longitudinal direction X.

The second protrusion 16 has a larger cross-sectional area than the first protrusions 15 and 17. In this specification, the cross-sectional area of the protrusion means the area of the cross-section orthogonal to the protrusion direction of the protrusion. In this embodiment, it is the area of the cross section in the plane direction parallel to the brush surface. The protrusion direction of the protrusion is a direction corresponding to the thickness direction Z of the hairbrush. When the cross-sectional area of the projection changes in the projecting direction of the projection, the maximum value of the cross-sectional area is the “cross-sectional area of the projection”. Further, when the first projections 15 and 17 have the spherical body 15a at the tip thereof as in this embodiment, the cross-sectional area of the projection is the cross-sectional area of the rod-shaped portion excluding the spherical body 15a.
When the spherical body 15a is provided, from the viewpoint of further improving the feel of the scalp, the spherical body 15a preferably has a cross-sectional area of the maximum diameter portion of 110% or more and 400% or less of the cross-sectional area of the protrusion, and more preferably 120. % To 250%.

The second protrusion 16 has a shorter length than the first protrusions 15 and 17. In the present specification, the lengths L3, L5 and L7 of the protrusions 15, 16 and 17 are the protrusion heights of the protrusions and the lengths from the brush surface 13 to the tips of the protrusions (see FIG. 4).

The hair brush 10 is used for brushing hair that has been dried using a dryer or the like, or hair that has been wet after towel drying. Wet hairs tend to gather in a state where the flow of hair is not arranged, and when brushing in this state, the hairs are easily entangled and caught on the protrusions of the hairbrush.
With respect to hair in such a wet state, the hairbrush 10 is unlikely to exert excessive force on the hair during brushing and reduces damage to the hair during brushing, so that the hair can be brushed smoothly. Specifically, by having the first protrusion region A sandwiched between the second protrusion rows J3 in the width direction Y, the second protrusions 16 having higher rigidity than the first protrusions 15 and 17 cause the hairs to contact each other. While the entanglement is effectively released, the second protrusion 16 has a shorter length than the first protrusions 15 and 17, so that the resistance due to the contact between the second protrusion 16 and the hair can be reduced. Since the plurality of second protrusions 16 are formed outside the width direction Y of the brush surface 13 along the longitudinal direction X, when brushing, the entanglement of hairs occurs before the first protrusions 15 and 17. Abut. By the second protrusions 16, the entanglement of the hair is easily released, and the hair can be smoothly combed. Moreover, in the first protrusion region A that comes into the widest contact with the hair, the cross-sectional area of the first protrusions 15 and 17 is smaller than that of the second protrusion, and the rigidity is low, so that the load applied to the hair can be reduced. In this way, the hairbrush 10 can reduce damage to wet hair during brushing, so that the hairbrush 10 is particularly effective for brushing Caucasian hair, which tends to have thin and wavy hair. Is.

On the other hand, with a hairbrush that does not have the first protrusion area A, an excessive load may be applied to the hair in a wet state to cause great damage. In addition, it is difficult to smoothly loosen wet hair with a hair brush that does not have the second protrusion row J3.

The rigidity of each protrusion can be represented by bending rigidity. The bending rigidity of the second protrusion 16 is preferably higher than that of the first protrusions 15 and 17 from the viewpoint of further reducing the resistance force due to the contact between the protrusion and the hair during brushing.
From the viewpoint of more reliably producing the above effect, the bending rigidity of the second protrusion 16 is preferably 200% or more, more preferably 250% or more, with respect to the bending rigidity of the first protrusions 15 and 17, and is also preferable. Is 450% or less, more preferably 350% or less, preferably 200% or more and 450% or less, more preferably 250% or more and 350% or less. When a plurality of types of first protrusions having different bending rigidity are provided as in the hairbrush of the present embodiment, the bending rigidity of the second protrusion 16 is within the above range in comparison with the bending rigidity of the first protrusion having the largest bending rigidity. Preferably.
The bending rigidity of the second protrusion 16 is preferably 0.1 N or more, more preferably 0.12 N or more, preferably 0.3 N or less, more preferably 0.25 N or less, and preferably 0.1 N. Or more and 0.3N or less, more preferably 0.12N or more and 0.25N or less.
From the viewpoint of further reducing the resistance force during brushing and improving brushing performance, the bending rigidity of the first large protrusions 17 is preferably 130% or more, more preferably the bending rigidity of the first small protrusions 15. It is 150% or more, preferably 230% or less, more preferably 200% or less, and preferably 130% or more and 230% or less, more preferably 150% or more and 200% or less.
The bending rigidity (N) of the protrusion can be measured by the following method using a force gauge (manufactured by Nidec Shinpo Co., Ltd.).

[Bending stiffness measurement method]
Using a force gauge (manufactured by Nidec Shinpo Co., product number FGP-5), a terminal of 6 mmφ is brought into contact with the tip of one protrusion Pr, and the measurement environment is 20° C., 65% RH, and the speed is 30 mm/min. A load is horizontally applied to bend the protrusion Pr so that the protrusion Pr bends in the protruding direction (see FIG. 5 ). At this time, the maximum strength when a load is applied to the protrusion Pr is measured until the movement distance of the tip of the protrusion Pr becomes 10 mm in the horizontal direction. The maximum strength is measured for three protrusions Pr, and the average value thereof is defined as the bending rigidity.

The cross-sectional area of the first protrusions 15 and 17 is preferably 0.1 mm ² or more, and more preferably 0, from the viewpoints of ensuring brushing performance that regulates the flow of hair and lowering the rigidity of the first protrusions 15 and 17. .12Mm ² or more, more preferably at 0.15 mm ² or more, and preferably 0.3 mm ² or less, more preferably 0.28 mm ² or less, still more preferably 0.27 mm ² or less, and preferably 0. 1 mm ² or more 0.3 mm ² or less, more preferably 0.12 mm ² or more 0.28 mm ² or less, more preferably 0.15 mm ² or more 0.27 mm ² or less. When the cross-sectional areas of the first projections 15 and 17 change in the projecting direction of the projections, it is preferable that the cross-sectional areas be within the above range.

From the viewpoint of improving the brushing performance of the second projections 16, the cross-sectional area of the second projections 16 is preferably 300% or more, more preferably 500% or more, with respect to the cross-sectional areas of the first projections 15 and 17. It is preferably 1000% or less, more preferably 900% or less, and preferably 300% or more and 1000% or less, more preferably 500% or more and 900% or less. From the same viewpoint as above, the second projection 16 preferably has a cross-sectional area of more than 0.3 mm ² . When there are a plurality of types of first projections having different cross-sectional areas as in the present embodiment, the ratio (% of the cross-sectional area of the second projection 16 to the cross-sectional area of the projection having the smallest cross-sectional area among the first projections (% ) Is preferably within the above range. When the cross-sectional area of the second projection 16 changes in the projecting direction of the projection, the maximum value is taken as the cross-sectional area of the projection.

The cross-sectional area of the first large protrusion 17 is larger than that of the first small protrusion and smaller than that of the second protrusion. From the viewpoint of improving the brushing performance of the first large protrusions 17, the cross-sectional area of the first large protrusions 17 is preferably 110% or more, more preferably 130% or more, with respect to the cross-sectional area of the first small protrusions 15. Further, it is preferably 180% or less, more preferably 150% or less, preferably 110% or more and 180% or less, more preferably 130% or more and 180% or less. When the cross-sectional area of the first large projection 17 changes in the projecting direction of the projection, the maximum value is taken as the cross-sectional area of the projection.

In the present embodiment, each of the protrusions 15, 16 and 17 is erected substantially perpendicular to the brush surface 13. With such a configuration, it is possible to further reduce the load applied to the hair during brushing.
From the viewpoint of increasing the rigidity of the second protrusion 16, the length L5 (see FIG. 4) of the second protrusion 16 is preferably 40% or more of the length L3, L7 (see FIG. 4) of the first protrusions 15 and 17, It is more preferably 50% or more, preferably 80% or less, more preferably 75% or less, and preferably 40% or more and 80% or less, more preferably 50% or more and 75% or less.
Further, from the viewpoint of efficiently performing brushing, it is preferable that the length L5 of the second protrusion is shorter than the length L7 of the first large protrusion 17. That is, the length L7 of the first large protrusion 17 is preferably longer than the length L5 of the second protrusion. With such a configuration, when each protrusion is inserted into the hair and the hair is combed with the hairbrush 10, the strong entanglement between the hairs can be solved by the second protrusion, and the first large protrusion having higher rigidity than the first small protrusion 15 The protrusions 17 can efficiently loosen the weak entanglement between the hairs on the tip side of the protrusions, and can effectively regulate the hair flow. The length L7 (see FIG. 4) of the first large protrusion 17 is preferably 85% or more, more preferably 95% or more, and preferably 100% of the length L3 (see FIG. 4) of the first small protrusion 15. % Or less, more preferably 100% or less, preferably 85% or more and 100% or less, and more preferably 95% or more and 100% or less.

The length L3 (see FIG. 4) of the first small protrusions 15 is preferably 14 mm or more, more preferably from the viewpoint of further reducing the resistance force caused by the contact between the protrusions and the hair during brushing and improving the brushing performance. 16 mm or more, more preferably 18 mm or more, preferably 22 mm or less, more preferably 21 mm or less, still more preferably 20 mm or less, and preferably 14 mm or more and 22 mm or less, more preferably 16 mm or more and 21 mm or less, further preferably It is 18 mm or more and 20 mm or less.

The hairbrush 10 of this embodiment includes a base body 11 in which a head base 12a and a handle 12c are integrally formed, and a brush base 13a fixed to the head base 12a. The base body 11 has a handle 12c extending from one end of the head base 12a in the longitudinal direction X, and the head base 12a and the handle 12c are continuous with each other. As shown in FIG. 4, the head portion 12 is configured to include a brush base portion 13a having a brush surface 13 and a head base portion 12a having a rectangular mounting opening 12b. A mounting opening 12b is formed on one surface of the head base 12a, and a brush base 13a is fitted and fixed so as to close the mounting opening 12b.

The base body 11 and the brush base 13a are plastic molded products made of synthetic resin. Examples of the synthetic resin include polyester resins such as polybutylene terephthalate and polyethylene terephthalate, ABS (acrylonitrile-butadiene-styrene copolymer) resin, PBT (polybutylene terephthalate) resin, PP (polypropylene) resin, PE (polyethylene) resin, PET (polyethylene terephthalate) resin, PCTA (polycyclohexane dimethylene terephthalate) resin, POM (polyacetal) resin, acrylic resin, AS (acrylic nitrile styrene copolymer) resin, PS (polystyrene) resin, thermoplastic elastomer resin, etc. Can be mentioned. Examples of the thermoplastic elastomer resin include styrene elastomer (TPS) such as SBS, SIS, SEBS, SEPS, olefin elastomer (TPO), ester elastomer (TPC), urethane elastomer (TPU), amide thermoplastic elastomer ( TPA), thermoplastic rubber cross-linking (TPV) and the like. These elastomers may be used alone or in combination of two or more.

The protrusions 15, 16 and 17 are preferably made of synthetic resin. Examples of the synthetic resin forming the protrusions include various synthetic resins used as materials for forming the base body 11 and the brush base 13a described above, and polyamide resins such as nylon and nylon 6. From the viewpoint of lowering the rigidity and further reducing the load applied to the hair during brushing, the material forming the first protrusions 15 and 17 is preferably nylon. From the viewpoint of increasing the rigidity of the second protrusions 16, the material forming the second protrusions 16 is preferably the above-mentioned thermoplastic elastomer resin or linear low-density polyethylene resin.

The thermoplastic elastomer resin used as the material for forming the second protrusions has a Shore D hardness [rubber hardness meter (GS709N model D) manufactured by Teclock Co., Ltd.) of preferably 40 or more, more preferably 50 or more, and It is preferably 65 or less, more preferably 40 or more and 65 or less, and even more preferably 50 or more and 65 or less. By having such hardness, it is possible to more easily release the entanglement between the hairs by the second protrusions and further suppress the hair from being caught.

The method for measuring the Shore D hardness is as follows.
[Measurement method of Shore D hardness]
The pressing surface of the rubber hardness meter held by both hands is vertically pressed at a constant speed from directly above the flat surface of the sample placed on a flat surface, and after adhesion, the value within 1 second is defined as "hardness". The measurement position of the sample is 12 mm or more inside from the edge of the sample, and the distance between the measurement points is 6 mm or more. The sample used for measurement is a plate having a length and a width of 25 mm or more and a thickness of 6 mm or more, and the test environment is a temperature of 23±2 degrees and a humidity of 50±5%. When a median value or an average value of 5 places is adopted as a measured value and a rubber hardness meter (GS709N type D manufactured by Teclock Co., Ltd.) shows 50, the Shore D hardness is 50 (“D50”).

In the first protrusion area A of the present embodiment, the first protrusions 15 and 17 are flocking protrusions that are erected only one by one with respect to the individual flocked holes 18. With such a configuration, it is possible to further prevent the hair from being caught between the protrusions during brushing.
On the brush surface 13 of the brush base 13a, a plurality of flock holes 18 in which the first protrusions 15 and 17 are erected are formed in a dispersed manner in the longitudinal direction X and the width direction Y. Is protruding. The bristles 18 formed in the brush surface 13 may be a bottomed recessed portion as shown in FIG. 7( a ), and the brush base portion 13 a as shown in FIGS. 7( b) and 7 (c ). It may be a through hole penetrating in the thickness direction. When the hair-implanted hole 18 is the recessed portion, as shown in FIG. 7A, a projection formed by folding a rod-shaped body in half along a flat line 19 may be provided upright in the recessed portion. In this case, from the viewpoint of further suppressing the hair from being caught, it is preferable that the protrusion is formed of a rod-shaped body that is fixed using a flat wire so that only one side of the folded portion protrudes from the hair transplant hole 18. The flat wire 19 may be made of metal such as brass. Further, when the flocked hole 18 is the through hole, the protrusion may be provided upright by inserting a rod-shaped body into the through hole. In this case, as shown in FIG. 7(b), the protrusion may be fixed by a retaining portion 21 formed at the end of the protrusion opposite to the brush surface 13, and as shown in FIG. 7(c). As shown, the end of the protrusion opposite to the brush surface 13 may be fixed by the fixing portion 23. As the fastening portion 21 and the fixing portion 23, it is preferable to use the same material as the material for forming the protrusions.

Similarly to the first protrusions 15 and 17, the second protrusions 16 may be flocked protrusions that are erected only one by one with respect to the individual flocked holes formed on the brush face, and the brush face 13 or It may be a molding protrusion integrally molded with a continuous portion arranged below the brush surface 13. As shown in FIG. 8A, the continuous portion 25 arranged below the brush surface 13 connects one end portions of the plurality of protrusions to each other, and below the brush base portion 13 a having the through hole 24. It is provided in. The through holes 24 correspond to individual molding protrusions. The protrusion integrally formed with the continuous portion 25 is provided by being inserted into a through hole provided in the brush base 13a, as shown in FIG. 8B. From the viewpoint of effectively untangling the hairs and improving the brushing performance, the second protrusion 16 is preferably the molding protrusion.

From the viewpoint of further reducing the load applied to the hair during brushing, when the second protrusion 16 is a molding protrusion, the second protrusion 16 and the brush surface 13 or the continuous portion 25 integrally molded with the second protrusion 16 are It is preferably formed of a soft resin.
Examples of the soft resin include olefin elastomer resin, styrene elastomer resin, polyester elastomer resin, urethane elastomer resin, acrylic elastomer resin, low density polyethylene resin and the like.

From the viewpoint of suppressing the generation of static electricity that may occur during brushing, the second protrusion 16 and the handle 12c are formed of a conductive resin, and the second protrusion 16 and the handle 12c are electrically connected. Preferably. With such a configuration, the handle 12c and the user are in contact with each other in the use state and electrically connected, so that the generation of static electricity can be effectively suppressed. As a form in which the second protrusion 16 and the handle 12c are electrically connected, the brush base 13a on which the second protrusion 16 is erected and the base main body 11 are formed of the same conductive resin. That is, the hair brush 10 is formed in a state where the brush base portion 13a and the base body 11 are in contact with each other. Also from this viewpoint, the second protrusion 16 is preferably the molding protrusion. From the viewpoint of suppressing the generation of static electricity that may occur during brushing, as the conductive resin, at least one selected from carbon fiber, stainless fiber, and antistatic agent is kneaded, and acrylonitrile-butadiene:styrene copolymer synthetic resin, polyolefin , Nylon 6, polycarbonate resin, etc. can be used.

From the viewpoint of further suppressing brushing of hair during brushing and facilitating brushing, the bisector dividing the length W1 of the first protrusion region A in the width direction Y into two equal parts is the width of the brush surface 13. It preferably coincides with a bisector CL that divides the total length W in the direction Y into two equal parts.
Further, from the viewpoint of further reducing the load applied to the hair during brushing, the first protrusion region A is preferably 20 mm on each side from the bisector CL that bisects the total length W of the brush surface 13 in the width direction Y. Hereafter, it is more preferable to be arranged over a range of 15 mm or less.

As shown in FIG. 3, in the hairbrush 10 of the present embodiment, the cross-sectional areas of the central region M of the brush surface 13 in the width direction Y and the pair of side regions S, S sandwiching the central region M are different from each other. It has a protrusion. Specifically, the central region M is the first protrusion region A, and the plurality of first protrusions 15 are arranged in each of the longitudinal direction X and the width direction Y. In the side regions S, S, a second protrusion row J3 and a first large protrusion row J5 in which the first large protrusions 17 are arranged along the longitudinal direction X are arranged. In this way, in the side regions S, S, the second protrusions 16 are each formed in plural along the longitudinal direction X to form a row. The first large projection row J5 is arranged between the first small projection row J1 and the second projection row J3.

As in the present embodiment, on both sides of the brush surface 13 that sandwich the central region M, there are thick projections 16 having a larger cross-sectional area than the first projections 15 and 17 and a length shorter than the first projections 15 and 17. It is preferable to have the protruding region B. The thick protrusion region B is a region located outside the first protrusion region A in the width direction Y, and is formed by connecting the centers of the first protrusions 15 and 17 located on the outermost side in the width direction Y. And a side formed by connecting the centers of protrusions other than the first protrusion to each other. The protrusions other than the first protrusions are, for example, the second protrusions 16 located at the outermost side in the longitudinal direction X or the width direction Y. By providing the second protrusions 16 having higher rigidity than the first protrusions 15 and 17 in the side regions S and S, the entanglement of the hairs during brushing can be more easily released.

It is preferable that the first protrusions 15 and 17 are provided in the first protrusion region A with an existence density of preferably 5 or more and 10 or less, more preferably 6 or more and 9 or less per 10 mm square. The existing density of the first protrusions 15 and 17 in the first protrusion region A is obtained by the following method.
First, in the region of the brush surface 13 in which the plurality of first protrusions 15 and 17 are formed, the centers of the first protrusions 15 and 17 located on the outermost sides in the longitudinal direction X and the width direction Y are connected to each other. Area A to be set is set. This area A is the first protrusion area. Next, a square area a of 10 mm square is set so that one of its vertices corresponds to an arbitrary first protrusion in the first protrusion area A. The number of the first protrusions 15 and 17 included in this square area a is counted. However, when the outer edge of the square region a and the first protrusions 15 and 17 in plan view overlap, the first protrusions 15 and 17 overlapping the outer edge of the square region a are the first protrusions included in the square region a. Do not count as protrusions 15 and 17. This measurement is performed at any three points in the first protrusion area A, and the average value of these is used as the existence density of the first protrusions 15 and 17.

On the brush surface 13 of the present embodiment, the first protrusion region A is continuous in the plane direction by 100 mm ² or more. From the viewpoint of further reducing the load applied to the hair during brushing, the area of the first protrusion region A on the brush surface 13 is preferably 20% or more, more preferably 35% or more, with respect to the area of the temporary region F. Further, it is preferably 80% or less, more preferably 70% or less, preferably 20% or more and 80% or less, more preferably 35% or more and 70% or less. The “temporary region F” is a region formed by connecting the centers of the protrusions located on the outermost sides in the longitudinal direction X and the width direction Y on the brush surface 13. Here, the protrusions forming the outer edge of the temporary region F are not limited to the first protrusions 15 and 17.
From the same viewpoint as above, the area of the first protrusion region A on the brush surface 13 is preferably 1000 mm ² or more, more preferably 1300 mm ² or more, further preferably 1500 mm ² or more, and preferably 3500 mm ² or less. More preferably, it is 3000 mm ² or less, still more preferably 2500 mm ² or less, preferably 1000 mm ² or more and 3500 mm ² or less, more preferably 1300 mm ² or more and 3000 mm ² or less, and further preferably 1500 mm ² or more and 2500 mm ² or less.

From the viewpoint of facilitating the passage of hair in the first protrusion area A during brushing, the ratio of the total cross-sectional area of the first protrusions 15 and 17 in the first protrusion area A is preferably 0.8% or more, more preferably 1%. % Or more, preferably 3% or less, more preferably 2.5% or less, and preferably 0.8% or more and 3% or less, more preferably 1% or more and 2.5% or less. The total sectional area of the first protrusions 15 and 17 in the first protrusion region A is obtained by the following method.

Within the first protrusion area A, three arbitrary square areas a of 10 mm square are set at three positions. As described above, the first protrusion region A is a region in which the first protrusions 15 and 17 are provided, and the first protrusions 15 and 17 located on the outermost side in the longitudinal direction X and the width direction Y. An area formed by connecting the centers together. Next, the total cross-sectional area of the first protrusions 15 and 17 included in the square area a is obtained. When the outer edge of the square area a in plan view and the first projections 15 and 17 overlap each other, half of the cross-sectional area of the first projections 15 and 17 is the first projection 15 included in the square area a. , 17 as a total cross-sectional area. When the cross-sectional areas of the first projections 15 and 17 change in the projecting direction of the projection, the maximum value is set as the cross-sectional area of the first projections 15 and 17. Then, for each of the three square regions a, the average value of the ratio of the total cross-sectional area of the first protrusions 15 and 17 to the area of the square region a is calculated, and this is calculated as the average value of the first protrusions 15 and 17 in the first protrusion region A. Percentage of total cross section.

In this embodiment, as shown in FIG. 3, the first protrusion region A is formed in the central region M in the width direction Y so as to extend in the longitudinal direction X. With such a configuration, it is possible to further prevent the hair from being caught during brushing.
From the viewpoint of further improving the above effects, the length L1 in the longitudinal direction X (see FIG. 3) of the first protrusion region A is preferable with respect to the total length L in the longitudinal direction X of the brush surface 13 (see FIG. 2). Is 70% or more, more preferably 80% or more, preferably 95% or less, more preferably 93% or less, and preferably 70% or more and 95% or less, more preferably 80% or more and 93% or less. .. The length L1 of the first protrusion region A in the longitudinal direction X is a region where the first protrusions 15 and 17 are provided, and the first protrusion 15 is located on the outermost side in the longitudinal direction X and the width direction Y. , 17 in the longitudinal direction X of the region formed by connecting the centers of the two.

In order to further prevent the hair from being caught during brushing, in the first protrusion area A, the length W1 in the width direction Y (see FIG. 3) becomes the total length W in the width direction Y of the brush surface 13 (see FIG. 2). On the other hand, it is preferably 20% or more, more preferably 30% or more, preferably 85% or less, more preferably 75% or less, and preferably 20% or more and 85% or less, more preferably 30% or more 75. % Or less. The length W1 of the first protrusion region A in the width direction Y is a region in which the above-described first protrusions 15 and 17 are provided, and is the first outermost position in the longitudinal direction X and the width direction Y. It is the length in the width direction Y of the region formed by connecting the centers of the protrusions 15 and 17.

From the viewpoint of further reducing the load applied to the hair during brushing, the first protrusion region A has the fine protrusion regions A1 in which the first protrusions 15 and 17 are provided at an existence density of 5 or more and 10 or less per 10 mm square. Preferably. In the hairbrush 10 of the present embodiment, the fine protrusion regions A1 are continuous in the plane direction by 100 mm ² or more. As described above, the fine protrusion regions A1 may be continuous in the plane direction, and the plurality of fine protrusion regions A1 may be present at a plurality of positions on the brush surface 13.
From the same viewpoint as described above, the area of the fine protrusion region A1 on the brush surface 13 is preferably 20% or more, more preferably 30% or more, still more preferably 35% or more with respect to the area of the first protrusion region A. , Preferably 100% or less, more preferably 90% or less, still more preferably 80% or less, and preferably 20% or more and 100% or less, more preferably 30% or more and 90% or less, further preferably 35% or more. It is 80% or less. The area of the fine protrusion region A1 being 100% of the area of the first protrusion region A means that the fine protrusion region A1 is formed over the entire area of the first protrusion region A.

From the same viewpoint as described above, the area of the fine protrusion region A1 on the brush surface 13 is preferably 1000 mm ² or more, more preferably 1300 mm ² or more, further preferably 1500 mm ² or more, and preferably 3500 mm ² or less, more preferably Is 3000 mm ² or less, more preferably 2500 mm ² or less, preferably 1000 mm ² or more and 3500 mm ² or less, more preferably 1300 mm ² or more and 3000 mm ² or less, and further preferably 1500 mm ² or more and 2500 mm ² or less.

The above-mentioned fine protrusion region is specified by the following method.
[Method of identifying fine protrusion area]
The first protrusion region A is formed by connecting the centers of the first protrusions located on the outermost sides in the longitudinal direction X and the width direction Y in the region of the brush surface 13 where the plurality of first protrusions are formed. Area A is set. Next, a square area a of 10 mm square is set such that one of its vertices corresponds to each first protrusion in the first protrusion area A. When the number of the first protrusions 15 and 17 included in the square region a is 5 or more and 10 or less, the square region a is determined to be the fine protrusion region A1 or a part of the fine protrusion region A1. When the outer edge of the square region a and the first protrusions 15 and 17 in plan view overlap, the first protrusions 15 and 17 overlapping the outer edge of the square region a are the first protrusions 15 included in the square region a. , Do not count as 17. When the square area a includes a projection having a larger cross-sectional area than the first projections 15 and 17, it is determined that the square area a is not the fine projection area A1. Such a determination is performed while sequentially shifting one apex of the square area a to the first protrusion adjacent in the longitudinal direction X or the width direction Y. Specifically, any one of the four vertices in the square region a is selected, and the selected vertices are matched with all the first protrusions in the first protrusion region A, and the above determination is performed. When the square region a in which the number of the first protrusions 15 and 17 is 5 or more and 10 or less continuously exists in at least one of the longitudinal direction X and the width direction, the entire continuous region becomes a fine protrusion region. ..

In the present embodiment, the fine protrusion region A1 is formed in the center region of the brush surface 13 in the width direction Y, more specifically, in the center region of the first protrusion region A in the width direction Y. With such a configuration, it is possible to further prevent the hair from being caught during brushing. The fine protrusion area A1 in the present embodiment is formed over the entire first protrusion area A.
From the viewpoint of further improving the above effect, the fine protrusion region A1 has a length in the longitudinal direction X of preferably 70% or more, more preferably 80% or more with respect to the total length L of the brush surface 13 in the longitudinal direction X. And preferably 95% or less, more preferably 93% or less, and preferably 70% or more and 95% or less, more preferably 80% or more and 93% or less. The length in the longitudinal direction X of the fine protrusion region A1 is the length between the front end and the rear end in the longitudinal direction X of the fine protrusion region A1 specified by the above-mentioned [method of specifying the fine protrusion region]. The front end in the longitudinal direction X is an end opposite to the handle 12c in the same direction X, and the rear end in the longitudinal direction X is an end on the handle 12c side in the same direction X.

From the viewpoint of further suppressing the hair from being caught during brushing, the fine protrusion region A1 preferably has a length in the width direction Y of 20% or more with respect to the total length W (see FIG. 2) of the brush surface 13 in the width direction Y. , More preferably 30% or more, preferably 85% or less, more preferably 75% or less, and preferably 20% or more and 85% or less, more preferably 30% or more and 75% or less. The length in the width direction Y of the fine protrusion area A1 is a length between one end and the other end in the width direction Y of the fine protrusion area A1 specified by the above-mentioned [method of specifying the fine protrusion area].

In the present embodiment, as shown in FIG. 3, the first small protrusions 15 include a first small protrusion row J1 in which a plurality of first small protrusions 15 are arranged in series along the longitudinal direction X at regular intervals, and a plurality of first small protrusions J1. The small projections 15 are arranged so as to form a first row of small projections J2 in the width direction that are arranged in series along the width direction Y at regular intervals. The first small protrusion rows J1 adjacent to each other in the width direction Y are arranged such that the arrangement positions of the first small protrusions 15 are displaced by a half pitch in the longitudinal direction X, and the first widthwise small protrusion rows J2 adjacent to each other in the longitudinal direction X. The arrangement positions of the first small protrusions 15 are displaced from each other by a half pitch in the width direction Y. As described above, it is preferable that the first small protrusions 15 are arranged in a zigzag manner in the first protrusion region A. As another aspect in which the first small protrusions 15 are arranged in a zigzag manner, the arrangement positions of the first small protrusions 15 in the first small protrusion rows J1 adjacent in the width direction Y are ⅓ in the longitudinal direction X. The width-direction first small protrusion rows J2 adjacent to each other in the longitudinal direction X may be displaced from each other by the pitch, and the arrangement positions of the first small protrusions 15 may be displaced from each other in the width direction Y by 1/3 pitch.
Further, in the first large protrusion row J5, the arrangement position of the first large protrusions 17 is displaced from the first small protrusion row J1 adjacent in the width direction Y by a half pitch in the longitudinal direction X. Thus, in the first protrusion area A, the first protrusions, including the first large protrusions 17, are preferably arranged in a staggered pattern.

From the viewpoint of further reducing the load applied to the hair during brushing, the total number of the first protrusion rows J1 and J5 in the first protrusion area A is not particularly limited, but is preferably 4 or more and 10 or less, and more preferably 6 or less. It is not less than 8 and not more than 8.

From the viewpoint of effectively performing brushing, the arrangement pitch P1 (see FIG. 6) of the first small protrusion row J1 is preferably 2 mm or more, more preferably 2.5 mm or more, and preferably 5 mm or less, more preferably It is 4 mm or less, preferably 2 mm or more and 5 mm or less, and more preferably 2.5 mm or more and 4 mm or less. The arrangement pitch P1 of the first small protrusion rows J1 is a separation distance between the first small protrusion rows J1 adjacent in the width direction Y, and the first small protrusions 15 forming the first small protrusion rows J1 in the width direction Y. Is the shortest distance between the centers of.
From the same viewpoint as above, the arrangement pitch P3 (see FIG. 6) of the first small protrusions 15 in the first small protrusion row J1 is preferably 3 mm or more, more preferably 4 mm or more, and preferably 7 mm or less, It is more preferably 6.5 mm or less, preferably 3 mm or more and 7 mm or less, and more preferably 4 mm or more and 6.5 mm or less. The arrangement pitch P3 of the first small projections 15 in the first small projection row J1 is the distance between the centers of the first small projections 15 adjacent in the longitudinal direction X in the first small projection row J1. The distance between the first small projection row J1 and the first large projection row J5 is preferably the same as the arrangement pitch P1 of the first small projection row J1. When the hairbrush has a plurality of first large protrusion rows J5, the arrangement pitch of the first large protrusion rows J5, that is, the distance between the first large protrusion rows J5 adjacent in the width direction Y is the first small protrusion. It is preferably the same as the arrangement pitch P1 of the row J1. The arrangement pitch of the first large projections 17 in the first large projection row J5 is preferably in the same range as the arrangement pitch P3 of the first small projections 15 in the first small projection row J1. The arrangement pitch of the first large protrusions 17 in the first large protrusion row J5 is the distance between the centers of the first large protrusions 17 adjacent in the longitudinal direction X in the first large protrusion row J5.
The arrangement pitch P1 of the first small projection row J1 and the arrangement pitch P3 of the first small projections 15 in the first small projection row J1 are the first small projections 15 when the brush surface 13 is viewed in plan. Is the distance between the centers of the tips.

In the present embodiment, the second protrusion 16 is arranged outward of the first large protrusion 17 in the width direction Y. Therefore, the second protrusion row J3 is arranged on the outer side in the width direction Y than the first small protrusion row J1 and the first large protrusion row J5, and is arranged in the width direction Y adjacent to the first large protrusion row J5. It is located on the outside. In the side region S, the cross-sectional area of the protrusion 16 arranged on the outermost side in the width direction Y is larger than the cross-sectional area of the protrusion 17 arranged on the outermost side in the width direction Y in the first protrusion region A. A larger size is preferable in that the entanglement of the hairs can be more easily released and the hairs can be further prevented from being caught.

Each thick protrusion region B of the present embodiment has two second protrusion rows J3. The number of the projection rows composed of the projections having a larger cross-sectional area than the first projections 15 and 17 is not particularly limited, but from the viewpoint of reducing the resistance force during brushing and easily untangling the hairs, the first projection region The number of rows of the second protrusion row J3 sandwiching A is preferably 2 or more and 5 or less, and more preferably 2 or more and 4 or less.

From the viewpoint of easily untangling the hairs, the thick protrusion region B is preferably formed to extend in the longitudinal direction X, and the length in the longitudinal direction X is longer than the length in the width direction Y. Is more preferable. From the same viewpoint as above, the length L2 (see FIG. 3) of the thick protrusion region B in the longitudinal direction X is preferably 70% or more with respect to the total length L (see FIG. 2) of the brush surface 13 in the longitudinal direction X, It is more preferably 80% or more, preferably 95% or less, more preferably 93% or less, and preferably 70% or more and 95% or less, more preferably 80% or more and 93% or less.

From the same viewpoint as above, the thick protrusion region B is preferably formed to extend in the longitudinal direction X. From the same viewpoint as above, the length W2 (see FIG. 3) of the thick protrusion region B in the width direction Y is preferably 5% or more with respect to the total length W (see FIG. 2) of the brush surface 13 in the width direction Y, It is more preferably 10% or more, preferably 30% or less, more preferably 25% or less, and preferably 5% or more and 30% or less, more preferably 10% or more and 25% or less.

In the first protrusion region A, as shown in FIG. 3, a plurality of first large protrusions 17 are formed along the longitudinal direction X. More specifically, the plurality of first large protrusions 17 are provided on both sides of the first protrusion region A in the width direction Y, that is, outside the region in which the first small protrusion row J1 is formed, in the width direction Y. A first large protrusion row J5 is formed in series in the longitudinal direction X. With such a configuration, the entanglement of the hairs can be more effectively released. In the first protrusion region A, the first large protrusion row J5 may be formed in only one row, or may be formed in a plurality of rows. From the viewpoint of improving the brushing performance, the number of the first large protrusion rows J5 arranged in series along the longitudinal direction X in the first protrusion area A is preferably 1 or more and 3 or less.

The shape of each of the above-mentioned protrusions is not particularly limited, and may be a shape that tapers toward the tip, or a shape that has the same cross-sectional area in the protrusion direction of the protrusion. From the viewpoint of further reducing the resistance force caused by the contact between the hair and the protrusion during brushing, it is preferable that the first protrusions 15 and 17 have the same cross-sectional area in the protrusion direction of the protrusion. Examples of such a shape include a cylinder, an elliptic cylinder, and a prism.
From the viewpoint of further increasing the rigidity, the second protrusion 16 preferably has a shape that tapers toward the tip. Examples of such a shape include a truncated cone shape and a truncated pyramid shape.

Each of the above-mentioned projections may or may not have a spherical body at its tip. The first protrusions 15 and 17 in the present embodiment have spherical bodies 15a and 17a at their tips. If the tip of the protrusion has a spherical body, the contact with the scalp becomes soft.

The head base 12a of the base body 11 is formed in a rectangular shape in plan view having a length of about 70 to 130 mm in the longitudinal direction X and a length of about 30 to 90 mm in the width direction Y, for example. The handle 12c of the base main body 11 is formed in a trapezoidal shape in a plan view, and the width gradually increases as the handle 12c moves away from the head base 12a in the longitudinal direction X. More specifically, the handle 12c has a trapezoidal shape in which the length in the longitudinal direction X is about 70 to 130 mm, the short side in the width direction Y is 15 to 25 mm, and the long side in the width direction Y is about 20 to 35 mm. Is formed in.
The brush base 13a has a rectangular shape in a plan view that substantially matches the opening shape of the mounting opening 12b of the head base 12a.

A preferred method of manufacturing the hair brush 10 is to form the base body 11 having the head base 12a, the brush base 13a, and the protrusions 15, 16 and 17 by injection molding or the like. When molding the brush base 13a, the second protrusion 16 may be integrally molded on the brush surface of the brush base 13a. On the brush surface 13 of the obtained brush base portion 13a, by using a known method such as a cutting process, a flock hole 18 for standing the projection 15 is formed, and the projection is planted on the flock hole 18. Then, the brush base portion 13a in which the protrusion 15 is erected on the brush surface 13 is fitted and fixed in the mounting opening 12b of the head base portion 12a.

A publicly known method can be adopted as a method of erected a protrusion in the flocked hole 18. For example, a method in which a rod-shaped body is folded into two in a flocked hole and driven, or a rod-shaped body is inserted into a through hole serving as a flocked hole and one end of the rod-shaped body protruding from the through-hole is heated to A method of fixing and forming a fastening portion 21 in the portion, a rod-shaped body is inserted into the through hole as the hair-implanted hole, and the molten resin is injected into the mold in which one end of the protrusion protruding from the through hole is arranged. A method of fixing the rod-shaped body by a fixing portion 23 formed by solidifying the molten resin can be used. In the "method of folding a rod-shaped body in two lines into a hair-implanting hole and striking it in", in order to prevent hair from being caught near the root of the protrusion, one bent portion when the rod-shaped body is folded in half is the brush surface. It is preferable that it does not protrude from 13. With such a configuration, one protrusion can be provided for each tufting hole.

The present invention is not limited to the above-described embodiments, and various modifications can be made.
For example, the brush surface 13 in the above-described embodiment is flat, but as in the hairbrush 10a shown in FIG. 9, the brush surface 13 is curved so as to project in the projecting direction of the projection in the cross section along the width direction Y. You may have.
Further, although the first projections 15 and 17 in the above-described embodiment have the spherical bodies 15a and 17a at their tips, as shown in FIG. 9, the first projections 15 and 17 have the spherical bodies 15a and 17a at their tips. 17a may not be included.
Further, although the second protrusion 16 in the above-described embodiment does not have the spherical body 16a at its tip, as shown in FIG. 9, the second protrusion 16 may have the spherical body 16a at its tip. Good.

The hairbrush 10 in the above-described embodiment has the first small protrusions 15 and the first large protrusions 17 having different cross-sectional areas as the first protrusions, and the second protrusions in the width direction Y outside the first large protrusion row J5. 16 is provided, however, as in the hairbrush 10b shown in FIG. 10, only the first small protrusion 15 may be provided as the first protrusion.
Further, the hairbrush 10 in the above-described embodiment has a plurality of second protrusions 16 having the same cross-sectional area, but may have second protrusions having different cross-sectional areas, and the lengths thereof are mutually different. The second protrusions may be different from each other, and the second protrusions may be different from each other in cross-sectional area and length.
The hairbrush 10b shown in FIG. 10 has a thick protrusion region B having two second protrusion rows in which the second protrusions 16 having the same cross-sectional area and the same length are arranged along the longitudinal direction X. The hairbrush 10c shown in FIG. 11 has two types of second protrusions 16r and 16s having different lengths, and the second protrusion 16r having the longer length is arranged along the longitudinal direction X. There are two rows of projections, and one second projection row in which the second projection 16s having the shorter length is arranged along the longitudinal direction X is provided. In order to further reduce the resistance at the time of brushing and to more easily untangle the hair, in the case where the hair brush has a plurality of types of second protrusions having different lengths from each other, the hairbrush has a length as shown in FIG. It is preferable that the shorter second protrusion is arranged outward in the width direction Y than the longer second protrusion. When the hair brush has a plurality of types of second protrusions having different lengths, the protrusion closest to the bisector CL that bisects the entire length W of the brush surface 13 in the width direction Y is used as a reference, and the bisector CL is When the cross-sectional areas and lengths of the respective projections are sequentially compared with each other toward the outside in the width direction Y, a projection having a larger cross-sectional area and a shorter length than the reference projection is specified as a “second projection”. ..
As shown in FIGS. 10 and 11, the number of the second protrusion rows in the thick protrusion region B may be two or more, and may be, for example, three.

The hairbrush of the present invention is mainly used for brushing human head hair, but can also be used for caring for the body and body hair of pets, livestock and the like.

Regarding the above-described embodiment, the present invention further discloses the following hairbrush.
<1>
A hairbrush having a head portion having a brush surface on which a rod-shaped projection is erected and a handle, wherein the brush surface has a longitudinal direction and a width direction orthogonal to the longitudinal direction, and the brush surface of the brush surface At the center portion in the width direction, the first protrusions each have a first protrusion region provided independently from each other with a space provided therebetween, and on each side sandwiching the first protrusion region in the width direction. A hairbrush, in which a plurality of second protrusions having a larger cross-sectional area and a shorter length than the first protrusions are formed along the longitudinal direction.

<2>
The hairbrush according to <1>, wherein the bending rigidity of the second protrusion is higher than the bending rigidity of the first protrusion.
<3>
The bending rigidity of the second protrusion is 200% or more, preferably 250% or more, and 450% or less, preferably 350% or less, and 200% or more and 450% or less, with respect to the bending rigidity of the first protrusion. The hairbrush according to <1> or <2>, which is preferably 250% or more and 350% or less.
<4>
The bending rigidity of the second projection is 0.1 N or more, preferably 0.12 N or more, and 0.3 N or less, preferably 0.25 N or less, and 0.1 N or more and 0.3 N or less, more preferably The hairbrush according to any one of <1> to <3>, which is 0.12 N or more and 0.25 N or less.
<5>
The cross-sectional area of the second protrusion is 300% or more, preferably 500% or more, and 1000% or less, preferably 900% or less, and 300% or more and 1000% or less, with respect to the cross-sectional area of the first protrusion. The hairbrush according to any one of <1> to <4>, which is preferably 500% or more and 900% or less.
<6>
Cross-sectional area of the first protrusion, 0.1 mm ² or more, preferably 0.12 mm ² or more, more preferably 0.15 mm ² or more, and is 0.3 mm ² or less, preferably 0.28 mm ² or less, more preferably is a 0.27 mm ² or less, 0.1 mm ² or more 0.3 mm ² or less, preferably 0.12 mm ² or more 0.28 mm ² or less, more preferably 0.15 mm ² or more 0.27 mm ² or less, The hairbrush according to any one of <1> to <5>.
<7>
The hairbrush according to any one of <1> to <6>, wherein the length of the second protrusion is 40% or more and 80% or less of the length of the first protrusion.
<8>
The length of the second protrusion is 40% or more, preferably 50% or more, and 80% or less, preferably 75% or less, and 40% or more and 80% or less of the length of the first protrusion. The hairbrush according to any one of <1> to <7>, which is 50% or more and 75% or less.
<9>
The hairbrush according to any one of <1> to <8>, wherein the first protrusion and the second protrusion are made of synthetic resin.
<10>
The hairbrush according to <9>, wherein the synthetic resin is a polyamide resin, and the polyamide resin is nylon or nylon 6.

<11>
The hairbrush according to <10> above, wherein the material forming the first protrusions is nylon.
<12>
The hairbrush according to any one of <9> to <11>, wherein the material forming the second protrusions is a thermoplastic elastomer resin or a linear low-density polyethylene resin.
<13>
In the first protrusion region, a plurality of hair transplant holes are formed in a state of being dispersed in the longitudinal direction and the width direction, and only one hair protrusion is provided for each of the hair transplant holes. The hairbrush according to any one of <1> to <12>, which is a protrusion.
<14>
The hairbrush according to any one of <1> to <13>, wherein the second protrusion is a molding protrusion integrally molded with the brush surface or a continuous portion arranged below the brush surface.
<15>
The hairbrush according to <14>, wherein the second protrusion and the brush surface or the continuous portion formed integrally with the second protrusion are made of a soft resin.
<16>
The hairbrush according to any one of <1> to <15>, wherein the second protrusion and the handle are made of a conductive resin, and the second protrusion and the handle are electrically connected. ..
<17>
The first protrusion has a first small protrusion and a first large protrusion whose cross-sectional areas are different from each other, and the cross-sectional area of the first large protrusion is larger than that of the first small protrusion and smaller than that of the second protrusion. The hairbrush according to any one of <1> to <16>, wherein a plurality of first large protrusions are formed in the first protrusion region along the longitudinal direction.
<18>
The bending rigidity of the first large protrusion is 130% or more, preferably 150% or more, and 230% or less, preferably 200% or less, and 130% or more and 230% of the bending rigidity of the first small protrusion. % Or less, preferably 150% or more and 200% or less, The hairbrush according to <17>.
<19>
The hair brush according to <17> or <18>, wherein the first small protrusion and the first large protrusion have the same length.
<20>
The first protrusion region has a first small protrusion row in which a plurality of first small protrusions are arranged in series in the longitudinal direction X,
The first large projection row in which a plurality of first large projections are arranged in series in the longitudinal direction is formed outside the region in which the first small projection row is formed, in the width direction Y. <17> to <19 > The hairbrush according to any one of <1>.

<21>
The hairbrush according to <20>, wherein the first large protrusion row is arranged between the first small protrusion row and the second protrusion row.
<22>
The arrangement pitch P1 of the first small protrusion rows in the width direction is 2 mm or more, preferably 2.5 mm or more, and 5 mm or less, preferably 4 mm or less, and 2 mm or more and 5 mm or less, preferably 2.5 mm or more. The hairbrush according to <20> or <21>, which has a length of 4 mm or less.
<23>
The arrangement pitch P3 of the first small protrusions in the first small protrusion row is 3 mm or more, preferably 4 mm or more, and 7 mm or less, preferably 6.5 mm or less, and 3 mm or more and 7 mm or less, preferably 4 mm or more. The hairbrush according to any one of <20> to <22>, which has a length of 6.5 mm or less.
<24>
The cross-sectional area of the first large protrusions is 110% or more, preferably 130% or more, and 180% or less, preferably 150% or less, and 110% or more and 180% with respect to the cross-sectional area of the first small protrusions. The hairbrush according to any one of the items <17> to <23>, which is preferably 130% or more and 180% or less.
<25>
The length L7 of the first large protrusion is 85% or more, preferably 95% or more, and 100% or less, preferably 100% or less, and 85% or more and 100% of the length L3 of the first small protrusion. The hairbrush according to any one of the items <17> to <24>, which is preferably 95% or more and 100% or less.
<26>
The hairbrush according to any one of <1> to <25>, wherein the first protrusion has a spherical body at its tip.
<27>
The hairbrush according to <26>, wherein the spherical body has a cross-sectional area of a maximum diameter portion of 110% or more and 400% or less, preferably 120% or more and 250% or less of a cross-sectional area of the protrusion.
<28>
Any one of the above <1> to <27>, in which the first protrusion region is provided with a first protrusion at a density of 5 or more and 10 or less, preferably 6 or more and 9 or less per 10 mm square. The hairbrush according to 1.
<29>
In the brush surface, when the region formed by connecting the centers of the protrusions located on the outermost side in the longitudinal direction and the width direction is a temporary region,
The area of the first protrusion region is 20% or more, preferably 35% or more, and 80% or less, preferably 60% or less, and 20% or more and 80% or less, with respect to the area of the temporary region. Is 35% or more and 60% or less, The hairbrush in any one of said <1>-<28>.
<30>
The ratio of the total cross-sectional area of the first protrusions in the first protrusion region is 0.8% or more, preferably 1% or more, and 3% or less, preferably 2.5% or less, and 0.8%. The hairbrush according to any one of the above items <1> to <29>, which is 3% or less and 3% or less, preferably 1% or more and 2.5% or less.

<31>
The first protrusion region has a length L1 in the longitudinal direction of 70% or more, preferably 80% or more, and 95% or less, preferably 93% or less, with respect to the entire length L of the brush surface in the longitudinal direction. Yes, and 70% or more and 95% or less, preferably 80% or more and 93% or less, The hairbrush in any one of said <1>-<30>.
<32>
The width W1 of the first protrusion region is 80% or more, preferably 85% or more, and 95% or less, preferably 93% or less, with respect to the entire length W of the brush surface in the width direction. And 80% or more and 95% or less, preferably 85% or more and 93% or less, The hairbrush in any one of said <1>-<31>.
<33>
The first protrusion region has fine protrusion regions in which the first protrusions are provided at an existence density of 5 or more and 10 or less per 10 mm square, and the fine protrusion regions are continuous in a plane direction by 100 mm ² or more. The hairbrush according to any one of <1> to <32>.
<34>
The area of the fine protrusion region is 20% or more, preferably 30% or more, more preferably 35% or more, and 100% or less, preferably 90% or less, and further preferably, the area of the first protrusion region. 80% or less, 20% or more and 100% or less, preferably 30% or more and 90% or less, more preferably 35% or more and 80% or less, The hair brush according to <33>.
<35>
The fine protrusion region is formed in a central region in the width direction of the brush surface, and the length of the fine protrusion region in the width direction is 20% or more with respect to the entire length of the brush face in the width direction. , Preferably 30% or more, and 85% or less, preferably 75% or less, and 20% or more and 85% or less, preferably 30% or more and 75% or less, in the above <33> or <34> Hairbrush as described.
<36>
In the narrow protrusion region, the first protrusion has a plurality of first protrusion rows in series in the longitudinal direction in the width direction,
The arrangement pitch of the first projection row is 2 mm or more and 5 mm or less,
The arrangement pitch P3 of the first protrusions in the first protrusion row is 3 mm or more and 7 mm, and the adjacent first protrusion rows in the width direction are displaced from each other by a half pitch in the arrangement position of the first protrusions in the longitudinal direction. The hairbrush according to any one of <33> to <35>.
<37>
The 1st protrusion area|region is a hairbrush in any one of said <1>-<36> formed extending in the said longitudinal direction.
<38>
The hair brush according to any one of <1> to <37>, wherein the second protrusion has a cross-sectional area of more than 0.3 mm ² .
<39>
The number of rows of the second projection row is 2 or more and 5 or less, preferably 2 or more and 4 or less, and the hair brush according to any one of <1> to <38>.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the scope of the invention is not limited to such embodiments.

[Example 1]
As Example 1, a hairbrush having a brush surface on which rod-shaped projections shown in Table 3 below are provided, a head portion having the brush surface, and a handle was manufactured. The length of the brush surface in the width direction was 60 mm, and the length in the longitudinal direction was 60 mm. The rod-shaped protrusions were spaced from each other in the longitudinal direction and the width direction and provided in a staggered manner. The arrangement pitch P1 in the width direction of the first small protrusions and the arrangement pitch P3 in the longitudinal direction of the first small protrusions are shown in Table 3 below. Table 3 below shows the number of the first small projections in the first small projection row and the number of the first small projection rows. On the brush surface, eight rows of first small projections in which nine first small projections are arranged in series in the longitudinal direction of the hairbrush are provided, and further on both sides in the width direction outside of the area where the eight first small projection rows are arranged. One row of the first large protrusions was provided in which nine first large protrusions were arranged in series in the longitudinal direction of the hairbrush. As the second protrusions, two types of protrusions having mutually different lengths are prepared, and the second protrusions are provided on both sides of the first protrusion region in the width direction outward, that is, in the width direction outward of the first large protrusion row. Three rows of second protrusions were provided in which nine protrusions were arranged in series in the longitudinal direction of the hairbrush. Specifically, outside the width direction Y of the first large protrusion row, two second protrusion rows in which second longer protrusions (hereinafter also referred to as second long protrusions) are arranged in series are arranged, One row of second projections in which second projections of shorter length (hereinafter also referred to as second short projections) are arranged in series is arranged outside these two rows in the width direction Y. In the present embodiment, the “second protrusion” means both the second long protrusion and the second short protrusion. The first large projection row was arranged between the first small projection row and the second long projection row in which the second long projections were arranged in series in the width direction. In addition, a plurality of first small projection rows and a plurality of first large projection rows are arranged in the width direction, and a plurality of second projection rows are arranged in the width direction outward of the first projection area. It was arranged so that juxtaposed thick projection regions were formed. The separation distance in the width direction between the first small projection row and the first large projection row is 3 mm, the separation distance in the width direction between the first large projection row and the second projection row is 6 mm, and the width between the second projection rows The separation distance in the direction was 3 mm. Table 3 below shows the length (mm), cross-sectional area (mm ² ) and bending rigidity (N) of these protrusions. The first small protrusion and the first large protrusion were made of nylon resin, and the second protrusion was made of polyester elastomer resin by injection molding. The base body and the brush base of the hair brush were produced by injection molding using acrylic resin. Similar to the protrusions shown in FIG. 7(b), each rod-shaped protrusion has a rod-shaped body inserted into a through hole that is a flocked hole, and the end of the rod-shaped body on the side opposite to the brush surface is heated to form a retaining portion. Fixed by forming.

[Example 2]
A hairbrush was produced in the same manner as in Example 1 except that the number of rows of the second long protrusions in which the second long protrusions were arranged in series in the longitudinal direction was one. In Example 2, since the number of the second protrusion rows was smaller than that in Example 1, the width W2 of the thick protrusion region in the width direction was 9 mm.

[Example 3]
A hairbrush was produced in the same manner as in Example 1 except that the second long protrusion was not provided. In Example 3, since the number of the second protrusion rows was smaller than that in Example 1, the width W2 of the thick protrusion region was 6 mm in the width direction.

[Example 4]
A hair brush was produced in the same manner as in Example 3 except that the second short protrusions had a cross-sectional area of 0.26 mm ² and a bending rigidity of 0.25 N. The second protrusion was made of nylon resin.

[Example 5]
A hairbrush was produced in the same manner as in Example 1 except that the first large protrusion was not provided.

[Comparative Example 1]
A hairbrush was produced in the same manner as in Example 2 except that the second long protrusion had a length of 18 mm, a cross-sectional area of 2.70 mm ² , and a bending rigidity of 0.16 N.

[Comparative Example 2]
A hairbrush was produced in the same manner as in Example 1 except that the second protrusion was not provided.

[Comparative Example 3]
A hairbrush was produced in the same manner as in Comparative Example 2 except that the first large protrusion was not provided.

[Comparative Example 4]
A hairbrush was produced in the same manner as in Example 4 except that the second short protrusions had a length of 12 mm, a cross-sectional area of 0.18 mm ² , and a bending rigidity of 0.11 N.

[Comparative Example 5]
A hairbrush was produced in the same manner as in Comparative Example 3 except that the cross-sectional area of the first small protrusion was 0.27 mm ² and the bending rigidity was 0.12N.

Table 3 below shows the constitution of the hairbrush in each of Examples and Comparative Examples. The cross-sectional area and length of the rod-shaped projections in Table 3, the number of primary projections per 10 mm square in the primary projection area, the total number of primary projections in the primary projection area, and the primary projection area with respect to the total length W in the width direction of the brush surface. The width W1 in the width direction and the total cross-sectional area of the first protrusion in the first protrusion region were obtained by the method described above. The first protrusions here mean the first small protrusions and the first large protrusions. The number of columns of the second protrusion row, the width W2 of the thick protrusion region in the width direction, and the total number of the second protrusions shown in Table 3 are only on one side of the thick protrusion regions arranged on both sides of the first protrusion region. Is the number of. Further, the number of rows of the first large protrusion rows shown in Table 3 is the number of rows on only one side in the width direction both sides in the region where the first small protrusion rows are arranged.

[Hair bundle for evaluation]
Japanese straight black hair with no history of chemical treatment, 40 g in weight, 35 cm in length, 5.5 cm in width was used as a bleaching agent (commercially available from Kao Co., Ltd., foam color hybrid, 1 agent). Bleaching was carried out with the mixing ratio of the two agents: 1:2). As the bleaching treatment, the following first to third steps were performed.
First step: The bleaching agent having the same mass as the hair bundle was applied to the hair bundle, treated at room temperature for 30 minutes, and rinsed with tap water at 40° C. for 30 seconds.
Second step: Next, 3.0 g of a model shampoo having a formulation shown in Table 1 below was applied to the hair bundle, and the hair bundle was foamed for 30 seconds for washing, and the hair bundle was rinsed with tap water at 40° C. for 1 minute.
Third step: Then, the water in the hair bundle was lightly cut with fingers, and the hair bundle was wiped for 30 seconds using a face towel of pile fabric.
The hair bundle that was subjected to the bleaching treatment three times was used as an evaluation hair bundle, and the following resistance during brushing and entanglement of hair were evaluated.

[Evaluation of resistance during brushing and entanglement of hair]
The hair bundle for evaluation is wetted with running water (tap water) at 40° C. for 30 seconds, 3.0 g of the model shampoo shown in Table 1 is applied, and the hair is whipped for 30 seconds to wash, and rinsed with running water at 40° C. for 1 minute. did. 3.0 g of the model conditioner shown in Table 2 below was applied to this hair bundle for evaluation, and after being conditioned for 30 seconds, it was rinsed with running water at 40° C. for 1 minute, and the water was cut lightly with a finger, and the face of the pile fabric was cut. Wipe with a towel for 30 seconds. This was used as a wet hair bundle for evaluation.

The brushes for evaluation in the wet state were brushed 10 times using the hairbrushes obtained in each Example and Comparative Example, and the resistance during brushing was evaluated. Furthermore, the entanglement of the hair remaining in the evaluation hair bundle after this brushing was evaluated.

The resistance during brushing was evaluated by three professional panelists on the basis of the following five-level evaluation, and the average score was calculated as the evaluation score. The evaluation points are shown in Table 3 below.
5 points: Resistance during brushing is weak.
4 points: Resistance when brushing is slightly weak.
3 points: I feel resistance during brushing.
2 points: Some resistance when brushing.
1 point: Strong resistance during brushing.

The evaluation of the entanglement of the hair after brushing was carried out by three expert panelists who evaluated the hair bundle when they put their fingers on the above-mentioned brush for evaluation after brushing. This evaluation was evaluated based on the following five-level evaluation, and the average score was calculated as the evaluation score. The evaluation points are shown in Table 3 below.
5 points: Good finger contact and no entanglement of hair.
4 points: Slightly good fingering and almost no entanglement of hair.
3 points: Some entanglement of hair is left to such an extent that the hair is not easily caught.
2 points: Tangle of hair remains to the extent that the hair is caught.
1 point: Tangle of hair remains to the extent that the hair is strongly caught.

As shown in Table 3 above, the hairbrushes of Examples 1 to 5 had a resistance evaluation point during brushing of 3.3 points or higher, and a hair entanglement evaluation point after brushing of 3.5 or higher. Met. On the other hand, in the hair brushes of Comparative Examples 1 to 5, one or both of the resistance during brushing and the entanglement of the hair after brushing were evaluated below 3.0. From the above results, the hair brushes of Examples 1 to 5 were able to eliminate the entanglement of the hair while suppressing the resistance to the wet hair. That is, since wet hair can be effectively brushed with a light load, damage to the hair during brushing can be reduced.
From the comparison between Example 1 and Example 5 in Table 3, by providing the first large protrusion row in the first protrusion region, the effect of reducing the resistance at the time of brushing and the effect of eliminating the entanglement of the hair are further improved. It was shown to improve.

10 Hair Brush 11 Base Main Body 12 Head 12a Head Base 12b Mounting Opening 12c Handle 13 Brush Surface 13a Brush Base 15 First Small Protrusion 16 Second Protrusion 17 First Large Protrusion 18 Flocking Hole A First Protrusion Region B Thick Protrusion Region F Temporary region X Longitudinal direction Y Width direction

Claims (10)

A hairbrush having a head portion having a brush surface on which rod-shaped projections are erected and a handle,
The brush surface has a longitudinal direction and a width direction orthogonal to the longitudinal direction,
In the widthwise central portion of the brush surface, the first protrusions have first protrusion regions that are spaced apart from each other and are independent of each other, and the first protrusion regions in the width direction. A hairbrush that has a plurality of second protrusion rows, each having a larger cross-sectional area and a shorter length than the first protrusion, formed on each of both sides sandwiching the second protrusion along the longitudinal direction. The hair brush according to claim 1, wherein the bending rigidity of the second protrusion is higher than the bending rigidity of the first protrusion. The hairbrush according to claim 1 or 2, wherein the length of the second protrusion is 40% or more and 80% or less of the length of the first protrusion. The hairbrush according to any one of claims 1 to 3, wherein the first protrusion and the second protrusion are made of synthetic resin. In the first protrusion region, a plurality of hair transplant holes are formed in a state of being dispersed in the longitudinal direction and the width direction, and only one hair protrusion is provided for each of the hair transplant holes. The hairbrush according to any one of claims 1 to 4, which is a protrusion. The hair brush according to any one of claims 1 to 5, wherein the second protrusion is a molding protrusion integrally molded with the brush surface or a continuous portion arranged below the brush surface. The hair brush according to claim 6, wherein the second protrusion and the brush surface or the continuous portion integrally formed with the second protrusion are made of a soft resin. The hairbrush according to any one of claims 1 to 7, wherein the second protrusion and the handle are made of a conductive resin, and the second protrusion and the handle are electrically connected. The first protrusion has a first small protrusion and a first large protrusion whose cross-sectional areas are different from each other, and the cross-sectional area of the first large protrusion is larger than that of the first small protrusion and smaller than that of the second protrusion.
The hairbrush according to any one of claims 1 to 8, wherein a plurality of first large protrusions are formed in the first protrusion region along the longitudinal direction. The hairbrush according to any one of claims 1 to 9, wherein the first protrusion has a spherical body at its tip.

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