JP2017080191A - Scalp brush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scalp brush having excellent brushing properties of hair and also exerting a favorable feeling to a scalp.SOLUTION: A scalp brush 10 includes plural protrusions protruding from a brush face of a base. All or some of the plural protrusions are protrusions 14, 19 including: a base part 15 including a soft part 16 made of elastomer and a hard part 17 made of synthetic resin harder than the elastomer constituting the soft part; and an upper soft part 18 constituting a tip side with respect to the base part 15 and made of elastomer. The base part 15 includes alternately in an outer peripheral face circumferential direction a first face exposing the soft part and a second face exposing the hard part. The elastomer constituting the soft part 16 of the base part 15 and the elastomer constituting the upper soft parts 18, 20 are continuous on a surface of the protrusions 14, 19.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a scalp brush for cleaning and massaging the scalp.

Various scalp brushes for cleaning and massaging the scalp have been proposed in which protrusions protruding from the brush surface are formed using an elastomer.
For example, the present applicant also proposed a scalp brush provided with a protrusion for sebum scraping having a plurality of small protrusions at the tip portion and a massage protrusion without a small protrusion at the tip portion as the protrusion made of elastomer. (See Patent Document 1).

Patent Document 2 is a massage brush provided with a massage protrusion having a core portion, a covering cylinder portion covering the peripheral surface of the core portion, and a friction end portion covering each of the tips. The core part, the covering cylinder part, and the friction end part are made of a flexible material such as an elastomer.
In addition, it has been proposed to form protrusions provided on the scalp brush from a plurality of materials having different hardnesses. Patent Document 3 discloses that a hard core part and the core part are attached to the hair washing brush from the outer peripheral surface. It is described that a flexible massage protrusion is provided which is made of an elastomeric covering covering the tip surface.

JP 2011-45706 A JP2013-48756A JP 2013-48781 A

If the entire protrusion protruding from the brush surface is made of an elastomer as in the scalp brush described in Patent Document 1, the hair combing property, that is, the slipping property when the hair is combed tends to be deteriorated. Also, as in Patent Document 3, when the entire outer peripheral surface and the front end surface of the hard core portion of the protrusion are covered with an elastomer, the hair combing property is similarly deteriorated.
On the other hand, when the entire protrusion is made of plastic, the scalp is apt to become too irritating.

  Accordingly, the inventors of the present invention form the core portion of the base portion of the protrusion and the tip side from the base portion from an elastomer, while surrounding the core portion with a cylindrical covering portion made of a material harder than the core portion. However, in that case, it has been found that the elastomer tends to crack at the upper end of the cylindrical covering portion. In the technique of Patent Document 2, one of the core part and the covering cylinder part and the friction end part are formed of a first color material, and the other of the core part and the covering cylinder part is different from the first material. It is a technology that displays the appropriate replacement time of a product by changing the color due to wear by forming it from a material of the second color of color, and Patent Document 2 discloses nothing about the improvement of hair combing properties. Not mentioned.

  Therefore, the subject of this invention is related to providing the brush for scalp which is excellent in the combing property of hair, and the touch given to a scalp is also favorable.

  The present invention is a scalp brush provided with a plurality of protrusions protruding from a brush surface of a base, wherein all or a part of the plurality of protrusions includes an elastomer soft part and the soft part. A base having a hard part made of a synthetic resin harder than the constituent elastomer, and an upper soft part made of an elastomer constituting the tip side from the base, the base being in the circumferential direction of the outer peripheral surface The first surface where the soft part is exposed and the second surface where the hard part is exposed are alternately provided, and an elastomer constituting the soft part of the base part and an elastomer constituting the upper soft part are provided. The present invention provides a scalp brush that is continuous on the surface of the protrusion.

  The scalp brush of the present invention is excellent in hair combing properties and has a good touch on the scalp.

FIG. 1 is a perspective view of a scalp brush according to an embodiment of the present invention. FIG. 2 is a plan view showing a brush surface of the scalp brush shown in FIG. 3 is a cross-sectional view taken along the line II-II in FIG. FIG. 4 is a perspective view of a first protrusion of the scalp brush shown in FIG. 1. 5A is a plan view of the first protrusion shown in FIG. 4, FIG. 5B is a cross-sectional view of the base of the first protrusion shown in FIG. 4, and FIG. 5C is FIG. It is explanatory drawing of the length of the hard part which extracts and shows only the hard part part of the cross-sectional view shown in FIG. FIG. 4 is a perspective view of a second protrusion of the scalp brush shown in FIG. Fig.7 (a) is a figure which shows the cross-sectional view of the base part of the 1st protrusion shown in FIG. 4, or the 2nd protrusion, FIG.7 (b)-FIG.7 (f) are about two or more symmetry axes. FIG. 7A is a view corresponding to FIG. 7A, showing another example of a base portion having a hard portion having a line-symmetric shape. 8 is a cross-sectional view taken along line III-III in FIG. FIG. 9 is a perspective view showing a third protrusion provided on the scalp brush according to the second embodiment of the present invention.

Hereinafter, the present invention will be described based on preferred embodiments thereof.
The scalp brush 10 according to the first embodiment of the present invention is a scalp brush suitable for scalp washing and massage, and as shown in FIGS. 1 and 2, the brush surface of a base 12 having a grip portion 11. 13, a plurality of first protrusions 14 and a plurality of second protrusions 19 are provided in a protruding manner. The brush surface 13 is a surface of the base 12 that faces the skin side of the head when the scalp brush 10 is used.

  The scalp brush 10 (hereinafter also simply referred to as the brush 10) is an upper surface of the base 12 opposite to the brush surface 13 with the gripping part 11 sandwiched between fingers, for example, when performing hair washing or hair care. Grip the brush 10 with the palm in close contact with the upper surface so as to cover the upper surface, and with the tips of the protrusions 14 and 15 protruding from the brush surface 13 pressed against the scalp. The brush 10 is used while moving. And when necessary, combined with the action of cleaning agents, hair care agents, cosmetics, etc. applied to the scalp and hair, it can efficiently remove sebum and clean pores, and has an excellent massage effect It is intended to be obtained.

As shown in FIG. 4 and FIG. 5B, the first protrusion 14 in the present embodiment includes a soft portion 16 made of an elastomer and a hard portion 17 made of a synthetic resin harder than the elastomer constituting the soft portion 16. A base portion 15 and an upper soft portion 18 made of an elastomer that constitutes the distal end side of the base portion 15 are provided.
As shown in FIG. 4, the base portion 15 of the first protrusion 14 in the present embodiment has a substantially cylindrical shape. Further, as shown in FIG. 5B, the hard portion 17 of the base portion 15 has a central shaft portion 17a located at the center portion in the cross section of the base portion 15, and the outer surface of the base portion 15 from the central shaft portion 17a. And four extending portions 17b extending in a cross-sectional shape as a whole. Moreover, the soft part 16 which consists of an elastomer is provided between all the extension parts 17b adjacent to each other in the circumferential direction of the base part 15 in the hard part 17. In this embodiment, the soft part 16 located between the adjacent extension parts 17b has a fan-shaped cross-sectional shape as shown in FIG.5 (b). The central shaft portion 17 a of the hard portion 17, the four extending portions 17 b, and the soft portion 16 between the extending portions 17 b each extend along the height direction Z of the first protrusion 14.
In the first protrusion 14, as shown in FIGS. 1 and 4, the elastomer constituting the soft portion 16 of the base portion 15 and the elastomer constituting the upper soft portion 18 are continuous on the surface of the protrusion 14. More specifically, the soft portion 16 and the upper soft portion 18 of the base portion 15 in the first protrusion 14 are integrally formed using the same elastomer material, and are adjacent to each other in the hard portion 17 having a cross-shaped cross-sectional shape. The upper portion of the soft portion 16 located between the extending portions 17 b is continuous with the upper soft portion 18.

  The distal ends of the four extending portions 17 b in the hard portion 17 reach the outer peripheral surface of the base portion 15, and the second surface 17 s where the hard portion 17 is exposed is formed on the outer peripheral surface of the base portion 15. The second surface 17s of each of the four extending portions 17b is exposed to the outer peripheral surface at positions (four locations) along the width direction X and the longitudinal direction Y. On the other hand, the region between the second surfaces 17s adjacent in the circumferential direction on the outer peripheral surface of the base portion 15 is a first surface 16s where the soft portion 16 made of elastomer is exposed. That is, the base portion 15 has a first surface 16 s where the soft portion 16 made of elastomer is exposed on the outer peripheral surface and a second surface 17 s where the hard portion 17 made of synthetic resin harder than the elastomer constituting the soft portion 16 is exposed. It has alternately in the circumferential direction.

As shown in FIGS. 4 and 5A, the first protrusion 14 has an upper soft portion 18 made of an elastomer on the tip side of the base 15 (the tip side of the protrusion 14).
More specifically, the first protrusion 14 includes a plurality of upper soft portions 18 that protrude further upward from an intermediate flat portion 18a having a flat cross-sectional shape and an upper end portion 18b of the intermediate flat portion 18a. Tip projection 18c. The plurality of tip protrusions 18c are provided in a state of being aligned in the long axis direction X ′ of the flat cross-sectional shape of the intermediate flat portion 18a. The first protrusions 14 are provided mainly for the purpose of enhancing the pore cleaning effect.
The cross-sectional shape of the intermediate flat part 18a is, for example, an ellipse or an ellipse. The degree of flattening of the intermediate flat part 18a is, for example, the length La of the long axis is 1.5 to 10 times the length of the short axis Lb in the central part in the height direction of the intermediate flat part 18a. Preferably they are 2 times or more and 7 times or less [refer to Drawing 5 (a)].
The tip protrusion 18c in the present embodiment is formed in a cone shape whose tip is a hemispherical convex curve, more specifically, a cone whose tip is a hemispherical convex curve. In this embodiment, each of the first protrusions 14 is provided with two tip protrusions 18c. However, the number of the tip protrusions 18c provided on the first protrusion 14 is three or three instead of two. It can also be more than a book.

The 2nd processus | protrusion 19 in the brush 10 for scalp of this embodiment is demonstrated. As shown in FIG. 6, the second protrusion 19 includes a base portion 15A having the same configuration as the base portion 15 of the first protrusion 14 and an upper soft portion 20 made of an elastomer that forms the tip side from the base portion 15A. ing. The description given above with respect to the base portion 15 of the first protrusion 14 is similarly applied to the base portion 15A of the second protrusion 19.
The upper soft portion 20 in the second protrusion 19 is made of the same elastomer as the soft portion 16 of the base portion 15 and has a conical shape in which the tip end portion 20a is a hemispherical convex curved surface. In the second protrusion 19, the diameter Ra of the convex curved tip 20 a is, for example, 1% to 50%, preferably 1% to 30%, of the diameter at the root of the protrusion 19. The second protrusion 19 is provided mainly for the purpose of enhancing the scalp massage effect.

  In the second protrusion 19, as shown in FIG. 6, the elastomer constituting the soft portion 16 of the base portion 15 </ b> A and the elastomer constituting the upper soft portion 20 are continuous on the surface of the protrusion 19. More specifically, the soft portion 16 and the upper soft portion 20 of the base portion 15A in the second protrusion 19 are integrally formed using the same elastomer material, and are adjacent to each other in the hard portion 17 having a cross-shaped cross section. The upper portion of the soft portion 16 located between the extending portions 17b is continuous with the upper soft portion 20.

  As shown in FIG. 2, the brush surface 13 of the scalp brush 10 of the present embodiment includes the width direction X of the brush surface corresponding to the major axis direction X ′ of the intermediate flat portion 18 a of the first protrusion 14, and the first protrusion. 14, and the longitudinal direction Y of the brush surface corresponding to the minor axis direction Y ′ of the 14 intermediate flat portions 18 a. The plurality of first protrusions 14 and the plurality of second protrusions 19 form a first protrusion row R14 and a second protrusion row R19 along the longitudinal direction Y of the brush surface 13. The first protrusion rows R14 and the second protrusion rows R19 are alternately formed in the width direction X of the brush surface 13.

  When using the scalp brush 10 of the first embodiment, for example, the gripping part 11 is sandwiched between fingers, and the palm is brought into close contact with the upper surface of the base 12 opposite to the brush surface 13 so that the upper surface is covered. The brush 10 is gripped so as to cover, and the brush 10 is moved, for example, in the width direction X in a state where the first protrusion 14 and the second protrusion 19 protruding from the brush surface 13 are pressed against the scalp, and washed as necessary. While applying agents, hair care agents, cosmetics, etc. to the scalp and hair, shampoo and care for the hair. The brush surface 13 is preferably made of a hard material from the viewpoint of hair combing properties.

In the scalp brush 10 of the present embodiment, first protrusions 14 and second protrusions 19 (hereinafter collectively referred to as multi-material protrusions) protruding from the brush surface 13 are formed of elastomers on the bases 15 and 15A. Since the first surface 16s where the soft portion 16 is exposed and the second surface 17s where the hard portion 17 made of synthetic resin harder than the elastomer is alternately exposed in the circumferential direction, only the protrusions made entirely of the elastomer are provided. Compared to the case, the friction between the protrusion and the hair can be reduced, and the slipperiness (hair combing property) when the hair is combed is improved.
Moreover, since the multi-material protrusions 14 and 19 have the upper soft parts 18 and 20 made of elastomer, the touch of the protrusions against the scalp is moderately soft and the touch given to the scalp is also good.
Further, on the surfaces of the multi-material protrusions 14 and 19, the elastomer constituting the soft portion 16 of the base portions 15 and 15 </ b> A and the elastomer constituting the upper soft portions 18 and 20 are continuous, and the first surface comprising the soft portion 16. Since 16s and the upper soft part 18 located above it are continuous, the second surface 17s made of the hard part 17 and the upper soft part 18 located above it are difficult to peel off. Preventing the peeling between the second surface 17s and the upper soft part 18 improves the durability of the brush 10 and can be used with confidence without damaging the scalp with the hard part 17 when the brush 10 is used. There are advantages.

From the viewpoint of improving hair combing properties, the length of the second surface 17s in the circumferential direction of the outer peripheral surface of the base portion 15 is preferably 15% or more, more preferably 30% of the same length of the first surface 16s. Or more, preferably 80% or less, more preferably 70% or less, and preferably 15% or more and 80% or less, more preferably 30% or more and 70% or less.
The length of the second surface 17 s is an average value of the lengths of the plurality of second surfaces 17 s existing in the circumferential direction of the outer peripheral surface of the base portion 15, and the length of the first surface 16 s is also the circumferential direction of the outer peripheral surface of the base portion 15. The average value of the lengths of the plurality of first surfaces 16s existing in

  In addition, from the viewpoint of achieving both improvement in hair styling and a feeling that the protrusion hits the scalp, the height t7 from the brush surface 13 to the upper end of the second surface 17s is the height t of the multi-material protrusions 14 and 19. , Preferably 15% or more, more preferably 20% or more, and preferably 70% or less, more preferably 50% or less, preferably 15% or more and 70% or less, more preferably 20% or more and 50%. It is as follows.

Further, in the scalp brush 10 of this embodiment, the interface between the hard part 17 and the soft part 16 and the interface between the hard part 17 and the upper soft part 18 are respectively composed of a molten elastomer and a non-molten composite. It joins by making it solidify in the state which contacted resin.
From the viewpoint of increasing the bonding area between the hard part 17 and the soft part 16 and preventing the soft part 16 from peeling off from the surface of the protrusion, the cross section of the base part 15 of the multi-material protrusions 14 and 19 [FIG. b)], it is preferable that the peripheral length of the hard portion 17 is longer than the peripheral length of the base portion 15. The peripheral length of the base 15 is the peripheral length of the outer peripheral surface of the base 15 measured without distinguishing between the first surface 16s and the second surface 17s, and the peripheral length of the hard portion 17 is shown in FIG. Thus, it is the circumference length of the hard part 17 measured along the surface of the hard part 17. When the circumference of the base 15 and the circumference of the hard part 17 change in the height direction of the base 15, the circumference of the base 15 and the circumference of the hard part 17 divide the height of the base 15 into two equal parts. Measure at an intermediate position in the 15 height direction.

  Moreover, in the scalp brush 10 of this embodiment, as shown in FIG.5 (b), the base part 15 of the multimaterial protrusions 14 and 19 has the single hard part 17 in each cross section, All of the second surfaces 17 s present on the outer peripheral surface of the base portion 15 are part of the single hard portion 17. In addition, the single hard part here means that the hard part is integrally configured in a cross-shaped cross-sectional shape, and, for example, four extensions having a central shaft part 17a and a second surface 17s. It means that the part 17b is comprised integrally. By having such a configuration, the durability of the hard portion 17 is improved. Further, when the hard portion 17 is injection-molded, or when the multi-material projections 14 and 19 are formed by injecting an elastomer into the cavity in which the hard portion 17 that has been injection-molded is disposed, deformation of the hard portion 17 such as bending is performed. Can also be prevented.

Further, in the scalp brush 10 of the present embodiment, as shown in FIG. 7A, the hard portion 17 in the base portion 15 of the multi-material projections 14 and 19 has a plurality of symmetry axes, more specifically, the base portion. 15 has a line-symmetric shape with respect to four symmetry axes A1 to A4 intersecting each other at the center portion. Thus, it is preferable that the hard portion 17 exists in a region including the central portion of the base portion 15.
Since the hard part 17 has a line-symmetrical shape with respect to a plurality of (two or more) symmetry axes, and more preferably a line-symmetrical shape with respect to three or more symmetry axes, The same applies to the direction. That is, when using the brush, the bending is the same regardless of the direction the brush is moved. Thereby, the touch given to the scalp is good and the hair combing property is excellent.

FIG. 7B to FIG. 7F are diagrams showing other examples in which the hard portion has a line-symmetric shape with respect to two or more symmetry axes, and are cross-sectional views of the base portion 15, respectively.
7 (b) and 7 (c), the hard portion 17 has a line-symmetric shape with respect to two symmetry axes A1 and A2, and the base 15 shown in FIG. The hard portion 17 has a line-symmetric shape with respect to the three symmetry axes A1 to A3, and the base portion 15 shown in FIG. 7E has a shape in which the hard portion 17 is line-symmetric with respect to the four symmetry axes A1 to A4. In the base portion 15 shown in FIG. 7F, the hard portion 17 has a line-symmetric shape with respect to the five symmetry axes A1 to A5.
The upper limit of the number of symmetry axes in which the hard portion 17 is line symmetric is not particularly limited. However, from the viewpoint of the bonding strength between the soft portion 16 and the upper soft portion 18 positioned above the soft portion 16, the number is 6 or less. The number of symmetry axes with which the hard portion 17 is line symmetric is preferably 2 or more and 6 or less, and more preferably 3 or more and 5 or less.

Further, in the scalp brush 10 of the present embodiment, the protrusions 14 and 19 have a plurality of parallel virtual straight lines drawn on the brush surface 13 (in this embodiment, the short axis direction X of the elliptical brush surface 13). They are arranged so as to form a plurality of projection rows R1 to R5 divided by six parallel lines Lx extending in parallel directions (see FIG. 2).
This arrangement improves the hair combing property of the scalp brush 10. In addition, even if the hairs are less likely to get entangled with the protrusions 14 and 19, and even if the detached hair adheres to or entangles with the protrusions, it is easy to slide the finger along the protrusion row or flush the shower water. It can also be removed.

  As shown in FIG. 2, the plurality of multi-material protrusions (protrusions 14 and 19) in the scalp brush 10 of the present embodiment is a protrusion row R1 in which the protrusions are arranged in series at predetermined intervals along the brush surface 13, as shown in FIG. To R5 are formed in a plurality of rows in an orthogonal direction orthogonal to the one direction. Each of the plurality of multi-material projections (projections 14 and 19) has a second surface 17 s where the hard portion 17 is exposed at a portion along the one direction on the outer peripheral surface of the base portion 15. In the scalp brush 10 of this embodiment, the one direction in which the protrusion rows R1 to R5 extend is the width direction X of the brush surface 13, and the orthogonal direction orthogonal to the one direction is the longitudinal direction Y of the brush surface 13. It is. According to the scalp brush 10 of the present embodiment, for example, when the scalp brush 10 is moved in the width direction X of the brush surface 13 to massage the scalp, the base 15 of the multi-material projections (projections 14 and 19) Since the second surface 17s existing in the portion along the width direction X comes into contact with the hair, the hair combing property is improved.

Further, in the scalp brush 10 of the present embodiment, as shown in FIG. 2, a plurality of projections of multi-material projections (projections 14 and 19) arranged in series at a predetermined interval are arranged in both the one direction and the orthogonal direction. Each of the plurality of multi-material protrusions (protrusions 14, 19) has a hard part 17 exposed at each of the part along the one direction and the part along the orthogonal direction on the outer periphery of the base part 15. A second surface 17s is provided. With this configuration, no matter how the scalp brush 10 is moved and used, the second surface 17s of the base portion 15 of the multi-material protrusion (protrusions 14 and 19) contacts the hair. It will be even better.
The multi-material projections (projections 14 and 19), when focusing on the individual projections, have portions made of the second surface 17s on both sides sandwiching the individual projections in one or both of the one direction and the orthogonal direction. It is preferable from the viewpoint of improving the spreadability. Further, from the viewpoint of improving the hair combing property, as shown in FIGS. 2 and 4, the one direction in which the protrusion rows R1 to R5 extend coincides with the major axis direction X ′ of the first protrusion 14, and the one The orthogonal direction orthogonal to the direction is preferably coincident with the minor axis direction Y ′ of the first protrusion 14.

Further, as shown in FIG. 3, the base 12 in the scalp brush 10 of the present embodiment has a base main body 27 whose bottom surface is opened as an elliptical mounting opening 27a and whose top surface is a smooth convex curved surface. The base 28 is fitted and fixed so as to close the mounting opening 27 a of the base main body 27, and the elastomer molded body 29 is fixed in a state where the bottom plate portion 29 a is sandwiched between the base main body 27 and the base 28. It consists of a part of.
As shown in FIG. 8, the substrate 28 has a hard portion support portion having the same shape as the cross-sectional shape of the hard portion 17 of the base portion 15 at a position corresponding to the arrangement position of the individual multi-material protrusions 14 and 19 within the thickness. 17e, and the hard portion support portion 17e is continuous with other portions of the substrate 28 at the periphery 17f. That is, the hard portion 17 is integrated with the substrate 28 via a hard portion support portion 17e having the same shape as the hard portion 17, and the hard portions 17 of the base portions 15 of the plurality of multi-material projections 14 and 19 are mutually connected to the substrate 28. Through each other. The base body 27 is a plastic molded product made of, for example, polyethylene or polypropylene. In addition, the base body 17 in the present embodiment is formed in an elliptical shape in plan view, for example, having a major axis length of about 80 to 100 mm and a minor axis length of about 70 to 90 mm.
The base body 27 is provided with a mounting portion 27b for mounting the bottom plate portion 29a of the elastomer molded body 29 on the inner side, and the bottom plate portion 29a of the elastomer molded body 29 is disposed on the mounting portion 27b. In this state, the substrate 28 is fixed to the mounting opening 27a. The bottom plate portion 29 a of the elastomer molded body 29 is sandwiched between the substrate 28 and the support rod 27 d that hangs down from the inner top surface portion of the base body 27 and the peripheral step portion 27 e of the mounting portion 27 b.

  The substrate 28 has an elliptical shape in plan view that substantially matches the opening shape of the mounting opening 27a of the base body 27, and the peripheral end surface 28a formed in the protruding shape is used as the opening edge of the mounting opening 27a. The base body 27 is fixed to the base body 27 by being engaged with a locking groove 27 c provided on the inner peripheral surface of the base body 27 along the surface. As shown in FIG. 8, through holes 28 e having the same cross-sectional shape as the individual soft portions 16 of the base portion 15 are formed in the substrate 28 so as to correspond to the arrangement positions of the individual multi-material protrusions 14 and 19. The elastomer constituting the soft portion 16 of the base portion 15 and the elastomer constituting the bottom base portion 29a of the elastomer molded body 29 are continuous through the through holes 28e. The durability of the base portion 15 of the multi-material protrusions 14 and 19 is made by the elastomer constituting the soft portion 16 of the base portion 15 and the elastomer constituting the plate-like bottom plate portion 29a disposed along the substrate 28 being continuous. Improves. The substrate 28 is preferably made of a hard material from the viewpoint of hair combing properties.

Here, the elastomer forming the soft portion 16 of the base portion 15, the upper soft portions 18 and 20, and the elastomer molded body 29 is a polymer molded body exhibiting rubber-like elasticity, and the elastomer resin constituting the elastomer is natural. Rubber (NR), diene rubber, non-diene rubber, thermoplastic elastomer and the like can be used. Among these, it is preferable to use a thermoplastic elastomer from the viewpoint that molding processing by injection molding is possible.
Examples of the diene rubber include isoprene rubber (IR), butadiene rubber (BR), styrene / butadiene rubber (SBR), chloroprene rubber (CR), and nitrile rubber (NBR). Non-diene rubber includes butyl rubber. (Isobutylene / isoprene rubber (IIR)), ethylene / propylene rubber (EPM), ethylene / propylene / diene rubber (EPDM), urethane rubber (U), silicone rubber (Q) and the like.
Thermoplastic elastomers include styrene elastomers (TPS) such as SBS, SIS, SEBS, SEPS, olefin elastomers (TPO), ester elastomers (TPC), urethane elastomers (TPU), amide thermoplastic elastomers (TPA). ), Thermoplastic rubber cross-linking (TPV) and the like.
These elastomers can be used alone or in combination of two or more.

In addition, the elastomer for forming the elastomer for forming the soft portion 16 of the base portion 15, the upper soft portions 18 and 20, and the elastomer molded body 29 has a hardness (Shore A hardness measured in accordance with ASTM D2240 0-100. ) Is preferably 30 or more, more preferably 40 or more, and preferably 80 or less, more preferably 70 or less, more specifically, preferably 30 or more and 80 or less, More preferably, a material of 40 to 70 is preferably used.
[Measurement method of Shore A hardness]
The pressure surface of a rubber hardness tester held with both hands is pressed vertically onto the flat surface of the sample at a constant speed from above, and the value within 1 second is defined as “hardness” after close contact. The measurement position of the sample is 12 mm or more inside from the end of the sample, and the interval between measurement points is 6 mm or more. The sample used for the measurement has a length and width of 25 mm or more and a thickness of 6 mm or more, respectively, and the test environment is a temperature of 23 ± 2 degrees and a humidity of 50 ± 5%. When a median value or average value at five locations is adopted as a measurement value and 50 is indicated by a rubber hardness meter (manufactured by TECLOCK Co., Ltd., GS709N type A), the Shore A hardness is 50 (“A50”).

  As an elastomer resin for forming the soft portion 16 and the upper soft portions 18 and 20 of the base portion 15 and the elastomer forming the elastomer molded body 29, particularly the elastomer forming the soft portion 16 and the upper soft portions 18 and 20 of the base portion 15. By using such a material, the multi-material projections 14 and 19 can be pressed against the scalp with a pressure that does not damage the scalp and does not hurt. Therefore, it is possible to give an appropriate stimulus, an excellent massage effect is obtained, and in combination with the action of a cleaning agent applied to the scalp and hair as necessary, removal of sebum and washing of pores is possible. It becomes possible to perform efficiently. When the scalp brush 10 is used together with a shampoo or a hair restorer, the soft portion 16 and the upper soft portions 18 and 20 of the base portion 15 and the elastomer molded body 29 are olefins having excellent chemical resistance against these. It is preferable to use an elastomer or a styrene-based elastomer. Specific examples of the elastomer molded product include a trade name elastomer AR (the hardness of 55 to 60), which is a styrene-based elastomer manufactured by Aron Kasei Co., Ltd.

On the other hand, the synthetic resin that forms the hard portion 17 of the base portion 15 and the substrate 28 of the base 12 is a resin that becomes a molded body harder than the elastomer that forms the soft portion 16 and the upper soft portions 18 and 20 of the base portion 15. The synthetic resin forming the hard portion 17 of the base 15 and the substrate 28 of the base 12 preferably has a numerical value (measured according to ASTM D2240 0-100 (Shore A hardness)) of 80 or more, 90 More preferably. Although there is no upper limit to hardness, for example, Shore D hardness (a numerical value measured in accordance with ASTM D2240 0-100 (Shore D hardness) using a rubber hardness meter (GS702N type D) manufactured by Teclock Co., Ltd.)) Is preferably 100 or less, and more preferably 80 or less.
[Measurement method of Shore D hardness]
The Shore D hardness is measured using a rubber hardness meter (GS702N type D) manufactured by Teclock Co., Ltd. When the Shore A hardness is measured by the same method as that for Shore A hardness and 50 is indicated by a rubber hardness meter (GS709N type D), the Shore D hardness is 50 (“D50”).

  In a preferable manufacturing method of the scalp brush 10 of the present embodiment, first, a hard molded body including the substrate 28 and the soft portion 16 of the base portion 15 integrated with the substrate 28 through the hard portion support portion, Manufactured by injection molding, press molding, 3D printer, etc. Next, after the hard molded body is disposed in the cavity, the cavity is filled with the molten elastomer resin, and the soft portion 16 and the upper soft portions 18 and 20 of the base portion 15 and the elastomer molded body 29 are manufactured. At the same time, it is joined to the hard molded body. By fitting and fixing the composite molded body thus obtained in the mounting opening 27a of the base body 27, the intended scalp brush 10 is obtained.

Next, the scalp brush of 2nd Embodiment is demonstrated. About the scalp brush of 2nd Embodiment, a different point from 1st Embodiment is demonstrated and description is abbreviate | omitted about the same point.
In the scalp brush according to the second embodiment, a third protrusion 21 shown in FIG. 9 protrudes from the brush surface 13 in place of the second protrusion 19 described above. As shown in FIG. 9, the third protrusion 21 includes a base portion 15B having the same configuration as the base portion 15 of the first protrusion 14, and an upper soft portion 22 made of an elastomer that forms the distal end side of the base portion 15B. ing. The description given above regarding the configuration of the base 12 on the base 15 of the first protrusion 14 in the first embodiment is similarly applied to the configuration of the base 15B of the third protrusion 21 and the base of the third embodiment.
The upper soft portion 22 in the third protrusion 21 is made of the same elastomer as the soft portion 16 of the base portion 15 and has a conical shape in which the tip end portion 22a is a hemispherical convex curved surface. In the third protrusion 21, the diameter Rb of the convex curved tip portion 22 a is, for example, more than 50% and less than 100%, preferably 60% or more and 100% or less of the diameter at the root of the protrusion 21.

The present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, the scalp brush of the first embodiment has the first protrusions 14 and the second protrusions 19 on the brush surface, but instead, only the first protrusion 14 or the second protrusion is on the brush surface. Only the protrusion 19 may be formed, or only the third protrusion 22 may be formed. Further, the arrangement of the first protrusions 14 and the second protrusions 19 can be variously modified. For example, only one row of the plurality of first protrusions 14 arranged in series in the major axis direction Y is formed on the brush surface 13. Alternatively, the brush surface 13 may be formed with only one row of the plurality of first protrusions 14 arranged in series in the minor axis direction X. Further, the first protrusions 14 and the second protrusions 19 may be arranged in a staggered manner over the entire area of the brush surface 13. Further, in the scalp brush according to the second embodiment, instead of setting all the second protrusions 19 to the third protrusions 21, the second protrusions constituting the row R <b> 19 of one or more second protrusions 19. Only a part of 19, for example, only one to three second protrusions 19 positioned at the center of the row R <b> 19 may be the third protrusions 21.

  Further, only a part of the plurality of protrusions protruding from the brush surface is harder than the protrusions such as the first protrusion to the third protrusion, that is, the soft portion made of elastomer and the elastomer constituting the soft portion. It can also be a protrusion provided with a base portion provided with a hard portion made of a synthetic resin and an upper soft portion made of an elastomer that constitutes the tip side from the base portion. However, 50% or more (upper limit is 100%) of the plurality of protrusions provided on the brush surface constitutes the protrusion, that is, the base portion including the soft portion and the hard portion, and the tip side from the base portion. A protrusion having an upper soft part is preferable.

  Moreover, the cross-sectional shape of the first to third protrusions may be a polygonal shape such as a square, a pentagon, or a rhombus, instead of a circle or an ellipse. Further, the scalp brush of the present invention may not have the grip portion 11 protruding from the base 12, or may be attached to the hand by inserting a hand into the annular insertion portion. Also good.

In addition, the description omitted in one embodiment and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately applied between the embodiments. Can be substituted for each other.
The scalp brush of the present invention is used for a human head, but can also be used for the care of a head of a pet or livestock.

DESCRIPTION OF SYMBOLS 10 Scalp brush 11 Grasp part 12 Base 13 Brush surface 14 1st protrusion 19 2nd protrusion 21 3rd protrusion 15, 15A, 15B Base 16 Soft part 16s 1st surface 17 Hard part 17s 2nd surface 18, 20, 22 Upper soft part 18a Intermediate flat part 18c Tip protrusion A1-A5 Symmetry axis R1-R5 Projection row R14 First projection row R19 Second projection row

Claims (6)

A scalp brush provided with a plurality of protrusions protruding from the brush surface of the base,
All or some of the plurality of protrusions constitute a soft part made of elastomer, a base part having a hard part made of a synthetic resin harder than the elastomer constituting the soft part, and a tip side from the base part. A protrusion having an upper soft part made of an elastomer,
The base portion has alternately the first surface where the soft portion is exposed and the second surface where the hard portion is exposed in the circumferential direction of the outer peripheral surface,
A scalp brush in which the elastomer constituting the soft portion of the base and the elastomer constituting the upper soft portion are continuous on the surface of the protrusion.   The scalp brush according to claim 1, wherein in the cross section of the base portion, the peripheral length of the hard portion is longer than the peripheral length of the base portion.   3. The base according to claim 1 or 2, wherein the base has a single hard part in a cross section thereof, and all of the second surface existing on the outer peripheral surface of the base consists of a part of the hard part. The scalp brush described.   The scalp brush according to any one of claims 1 to 3, wherein the hard part has a line-symmetric shape with respect to three or more symmetry axes in a cross section of the base part. The plurality of protrusions are formed on the brush surface in a plurality of rows in a perpendicular direction perpendicular to the one direction, with a row of protrusions arranged in series at a predetermined interval along one direction,
The scalp brush according to any one of claims 1 to 4, wherein each of the plurality of protrusions has the second surface at a portion along the one direction on the outer peripheral surface of the base portion. A plurality of the protrusions are arranged in series at a predetermined interval, and have a protrusion row in both the one direction and the orthogonal direction.
6. The scalp brush according to claim 5, wherein each of the plurality of protrusions has the second surface on each of a portion along the one direction and a portion along the orthogonal direction on the outer peripheral surface of the base portion. .

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