JP5639786B2 - Makeup brush - Google Patents

Description

  The present invention relates to a cosmetic brush.

Conventionally, cosmetic brushes for applying cosmetics such as mascara are screw brushes that are spirally twisted while holding the brush fibers with two metal core wires, and the brush fibers are planted around the comb shaft. In recent years, a large number of needle-like protrusions, which are created by integral injection molding using a resin material and extend radially from the center of the shaft, are formed on the surface of the shaft. Many brushes provided in the longitudinal direction have been proposed and commercialized.
For example, in the applicator described in Patent Document 1, the application area of the brush part integrally molded with resin is such that the needle-like protrusions made of the same material are regularly 360 ° radially in the radial direction, and the axial direction. In addition, they are regularly arranged by a predetermined length.

However, in the case of integral injection molding, since the needle-like protrusions are made of the same material, they have the same physical properties, but conversely, the materials and colors are partially changed to obtain different physical properties and color sensations. I can't respond to the request.
Furthermore, since it is integrally injection-molded with one mold, it seems that it can be manufactured easily and inexpensively, but the mold has a large number of pores corresponding to all the needle-like protrusions, In order to completely fill the pores with the resin, it is necessary to inject the resin at an ultrahigh pressure. In addition, since the needle-like projections are arranged radially in the radial direction, it is necessary to process the mold in a complicated manner, requiring a large amount of processing cost, and can always only mold the same shape and arrangement, In order to meet the diverse needs of customers, new molds had to be constantly recreated.

JP 2005-125021 A

  The present invention is a cosmetic brush obtained by resin injection molding, which can produce various variations by partially changing the shape, material, and color of the needle-like protrusions, and is easy to injection molding. Moreover, it is an object of the present invention to provide a cosmetic brush that can simplify the structure of a molding die.

The present inventor has solved the above-mentioned problems by configuring a cosmetic brush by combining a plurality of members having specific shapes that are individually injection-molded.
That is, the present invention is a cosmetic brush in which a large number of needle-like projections extending in the radial direction of the shaft portion are arranged in a row in the axial direction of the shaft portion on the surface of the shaft portion, and is injection-molded with a resin It is a cosmetic brush formed by combining two or more constituent members having a series of needle-like protrusions in the axial region.

  According to the present invention, it is possible to produce a cosmetic brush having various variations in the shape, material, and color of the needle-like protrusions. In addition, the mold can be made into a split mold that is simple and easy to process. In this case, for example, a portion corresponding to the needle-like protrusion or a vent hole is not formed by opening a hole, but by splitting. Grooves can be formed in both molds. Furthermore, since the injection molding is performed for each of a plurality of structural members having a simple structure, it is possible to reliably form the needle-like protrusions without injecting at an ultrahigh pressure.

It is a perspective view of an example of the cosmetic brush of this invention. It is a top view of an example of the brush for makeup of the present invention. It is a side view of an example of the cosmetic brush of the present invention. It is sectional drawing in the axial center plane of an example of the cosmetic brush of this invention. It is a perspective view of 1 component of an example of the brush for makeup of the present invention. It is a perspective view of the other structural member of an example of the cosmetic brush of this invention. It is a perspective view which shows the process of assembling the structural member shown in FIG. 5, and the structural member shown in FIG. It is a perspective view which shows the process of assembling all the structural members in an example of the cosmetic brush of this invention. It is a side view of the other example of the cosmetic brush of this invention. It is a perspective view of the other example of the cosmetic brush of this invention. It is a top view of an example of a cosmetic container using the cosmetic brush of the present invention.

As described above, the cosmetic brush of the present invention is constituted by combining two or more constituent members having a series of needle-like protrusions injection-molded with resin in the axial region.
As the needle-like protrusions, those extending radially in the radial direction of the shaft part are preferable, and the constituent members have columns of needle-like protrusions of the same or different number of rows, respectively, and in the circumferential direction of the shaft part. It is preferable that they are continuously arranged.
In the example shown in FIGS. 1 to 8, the cosmetic brush B has a column of needle-like protrusions at each of two positions obtained by injection molding in two rotational symmetry directions, that is, in directions different from each other by 180 °. Four constituent members 1, 2, 3, and 4 (reference numerals are described in FIGS. 5 to 8) are combined to form a shaft portion BC (reference numerals are described in FIG. 2) in the axial region. .

  That is, in the structural member 1, a series of needle-like protrusions 11a and needle-like protrusions that extend radially in directions different from each other by 180 degrees on the surfaces of the shaft peripheral portions 12a and 12b positioned in directions different from each other by 180 degrees. Similarly, in the component member 2, the columns of the needle-like protrusions 21 a and the columns of the needle-like protrusions 21 b are formed on the surfaces of the shaft peripheral portions 22 a and 22 b, respectively. In the member 3, a column of needle-like protrusions 31a and a column of needle-like protrusions 31b are formed on the surfaces of the shaft peripheral parts 32a and 32b. In the component member 4, each of the shaft peripheral parts 42a and 42b is formed. A column of needle-like protrusions 41a and a column of needle-like protrusions 41b are formed on the surface.

  The component 1 has a connecting portion 13 and an axial core portion 14 that is closest to the connecting portion 13 in which the axial core portion is divided into four parts, thereby supporting the shaft peripheral portions 12a and 12b. Yes. Similarly, the component member 2 has a shaft core portion 24 that is second closest to the connecting portion 13 in which the shaft core portion is divided into four parts, thereby supporting the shaft peripheral portions 22a and 22b. The component member 3 has a shaft core portion 34 that is the third closest to the connecting portion 13 in which the shaft core portion is divided into four parts, thereby supporting the shaft peripheral portions 32a and 32b. The member 4 has a shaft core portion 44 farthest from the connecting portion 13 in which the shaft core portion is divided into four, thereby supporting the shaft peripheral portions 42a and 42b.

As for the assembly method of the four constituent members, first, the constituent member 1 shown in FIG. 5 and the constituent member 2 shown in FIG. 6 are used, and as shown in FIG. Insert between shaft peripheral parts 12a and 12b and combine.
Next, as shown in FIG. 8, the shaft core portion 34 of the component member 3 is inserted between the shaft peripheral portions 12 a and 12 b of the component member 1 and the shaft peripheral portions 22 a and 22 b of the component member 2. In addition, the constituent member 2 and the constituent member 3 are combined, and the shaft core portion 44 of the constituent member 4 is connected to the shaft peripheral portions 12 a and 12 b of the constituent member 1, the shaft peripheral portions 22 a and 22 b of the constituent member 2, and the shaft of the constituent member 3. The constituent member 1, the constituent member 2, the constituent member 3 and the constituent member 4 are combined by being inserted between the peripheral portions 32 a and 32 b.
Thus, by combining the four constituent members in the shaft region, the shaft portion BC is formed by the eight shaft peripheral portions and the four shaft core portions, and as shown in FIG. 1, on the surface of the shaft portion BC, A cosmetic brush is obtained in which needle-like protrusions extending in the radial direction of the shaft portion BC are arranged in eight rows in the axial direction in a vertical column.
In the process of sequentially fitting the component members, for example, by adopting a method of fitting with the concaves and convexes at the tip of the shaft core portion, it is possible to fix the position and fix the whole so that it does not rotate even in the case of three or more component members. If necessary, after the combination process or after completion of the combination, adhesion by an adhesive or welding by ultrasonic waves may be applied to ensure the entire fixing. Also, the form of combination in the axis region is not limited to the form shown in FIGS. 1 to 8, and various forms can be adopted.
As described above, the shaft portion BC in the present invention is formed by the shaft peripheral portion and the shaft core, and the region in which the shaft portion BC is formed by combining the shaft peripheral portion and the shaft core is defined as “ It is called “Axis area”.

  The cosmetic brush shown in FIGS. 1 to 8 is composed of four constituent members each having a column of needle-like protrusions in each of two positions in two rotational symmetry directions, that is, in directions different from each other by 180 ° in the axial region. As a whole, it has eight rows of needle-like projections, but the number of constituent members is not limited to four, and six rows of needle-like shapes combining three constituent members It is also possible to have a configuration having a column of protrusions or a configuration having 10 columns of needle-like protrusions in which five components are combined.

Further, as shown in FIG. 9, there are three components having symmetric rows other than two rotations, for example, three rotation symmetry with each other, that is, three columns of needle-like projections at three positions in directions different from each other by 120 °. That is, a series of needle-like protrusions 11a, a series of needle-like protrusions 11b extending radially in directions different from each other by 120 degrees on the surfaces of the shaft peripheral portions 12a, 12b and 12c located in directions different from each other by 120 degrees, and A first component formed by forming a column of needle-like protrusions 11c, similarly, a column of needle-like protrusions 21a, a column of needle-like protrusions 21b, and a needle-like protrusion on the surface of each of the shaft peripheral portions 22a, 22b and 22c. The second component member in which the columns 21c are formed, and the columns of the needle-like protrusions 31a, the columns of the needle-like protrusions 31b, and the columns of the needle-like protrusions 31c are formed on the surfaces of the shaft peripheral portions 32a, 32b, and 32c. Is The third component by combining in the axial region composed, can be configured to have a column of needle-like projections 9 columns. It is also possible to combine four rotationally symmetric constituent members into a configuration having twelve rows of needle-like protrusions.
In the case of rotational symmetry, if the shaft circumferential portions are in a rotationally symmetric position, the columns of the needle-like protrusions do not necessarily have to be in a rotationally symmetric position with each other. The component which does not have a column may be sufficient.
However, it is preferable from the viewpoint of assembling workability to use a constituent member having a series of needle-like protrusions at a rotationally symmetric position. In particular, the needle is located at each of two rotationally symmetric positions, that is, two positions different from each other by 180 °. It is further preferable to assemble a plurality of constituent members each having a column of protrusions because the advantage of simplifying the structure of an injection mold is added. Further, the number of constituent members is preferably 2 to 10 from the viewpoint of easy assembly.

The shape of the needle-like protrusion may be any of a circular, elliptical, triangular, quadrangular or other polygonal cross section. In addition, the tip may have the same thickness up to the tip, or may have a partly different thickness within the projection, such as tapering toward the tip, and the tip may be spherical in order to soften the look and feel. . Furthermore, not only these shapes but various shapes can be adopted.
The constituent members do not have to have the same shape, material, and color, but depending on the characteristics required as a cosmetic brush, for each constituent member or for each combination of several constituent members, the material and color, The shape of the needle-like protrusion may be different, or the shape of the needle-like protrusion may be different depending on the location even with one component member.
In addition, in the example shown in FIGS. 1-8, all the acicular processus | protrusions have a cross section with a triangle, and become a taper shape toward the front-end | tip.

The shape of the shaft portion may be any of a cylindrical shape, an elliptical column shape, a polygonal column shape, and the like. In the case of a polygonal column, a polygonal column having a number of corners corresponding to the number of columns of needle-like projections formed on the surface of the shaft portion, for example, the number of columns of needle-like projections as in the examples of FIGS. When is 8, it is appropriate to use an octagonal prism shape.
Further, as shown in FIG. 10, the shaft portion may be curved. (The embodiment shown in FIG. 10 is the same as the embodiment shown in FIG. 1 except that the shaft portion is curved, so the reference numerals are omitted in FIG. 10.) The cosmetic brush of this embodiment is made of a hard material. It is also possible to assemble with a component member that is molded with a corresponding shape of the curved portion of the shaft portion and / or a component member that is molded with a soft material resin into the corresponding shape of the curved portion of the shaft portion. In order to facilitate, the following method is preferable. In addition, a component member formed of a hard material resin may be abbreviated as “hard component member”, and a component member formed of a soft material resin may be abbreviated as “soft component member”.
(1) One component member is a hard component member formed into a curved shape, the remaining component member is a flexible component member formed into a linear shape, and a soft component member is formed into a hard component member in the shape of a hard component member. While being deformed in a form to follow, it is sequentially inserted and assembled into a curved shape as a whole. In addition, when there are several kinds of materials for the soft component member, the soft component members are inserted so as to gradually become a soft material.
(2) One component member is a rigid component member formed into a curved shape, the remaining component member is a flexible component member formed into a linear shape, the flexible component members are inserted sequentially, and finally the hard component member The constituent member is inserted, and the portion formed by the flexible constituent member is deformed in a form that follows the shape of the hard constituent member, and is assembled into a curved shape as a whole. In addition, when there are several kinds of soft materials, in the process of assembling the soft component member, the soft material is inserted so as to gradually become a soft material.
In the methods (1) and (2) described above, the degree of hardness of the constituent member that serves as a reference for the insertion order may be determined by measuring the hardness of the constituent member and using the numerical value.

The component member is obtained by injection molding a thermoplastic resin or a thermosetting resin.
As thermoplastic resins, synthetic rubbers such as nitrile rubber and butyl rubber, thermoplastic elastomers such as styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butadiene-styrene (SEBS), polyurethane, HDPE / MDPE / Polyethylene (PE) such as LDPE / LLDPE, ethylene-α-olefin copolymer, ethylene-vinyl acetate copolymer (EVA), ethylene-methyl methacrylate copolymer (EMMA), polyolefin resin such as polypropylene, PET / PBT Polyester resin such as acrylate polymer, acrylic resin such as methacrylate polymer, acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene copolymer (AS), polyamide resin, polyacetal resin, etc. As thermosetting resin, diallyl phthalate resin, unsaturated polyester resin, phenol resin, epoxy resin, thermosetting polyurethane, alkyd resin, melamine resin, urea resin, thermosetting polyimide resin, thermosetting acrylic Resin or the like can be used.
Among these resins, in particular, polyolefin resins are desirable from the viewpoint of assembly workability, and thermoplastic elastomers and polyamide resins are preferable from the viewpoint of good feeling of use of the brush.

A cosmetic container using the cosmetic brush of the present invention is, for example, as shown in the plan view of FIG. 11, and includes a container body X and an applicator Y. The applicator Y is applied to the cap Y1 according to the present invention. The brush B is formed by being fixed to the connecting portion 13 directly or via an appropriate support member.
The applicator Y is screwed onto the container body X by screwing with a female screw (not shown) provided on the inner peripheral surface of the cap Y1 and a male screw provided on the outer peripheral surface of the upper opening end of the container main body X. It has a shape that can be worn.

The cosmetic brush of the present invention can produce various variations in the shape, material, and color of the needle-like protrusions, and the mold can be made into a split mold that is simple and easy to process. In addition, since injection molding is easy, it is suitably used as a mascara brush, an eyebrow brush, or a hair brush contained in containers such as various cylindrical bodies, square cylinders, and bottles.
The minute integral injection molding brush such as a mascara brush has a remarkable problem that the mold must be processed in a complicated manner and it is difficult to produce variations. However, the cosmetic brush of the present invention has these minute integral injection molded brushes. In particular, it is preferable to be used for a mascara brush.

1, 2, 3, 4: Component members 11a, 11b, 11c, 21a, 21b, 21c, 31a, 31b, 31c, 41a, 41b: acicular protrusions 12a, 12b, 12c, 22a, 22b, 22c, 32a, 32b , 32c, 42a, 42b: shaft peripheral portion 13: connecting portions 14, 24, 34, 44: shaft core portion B: cosmetic brush BC: shaft portion X: container body Y: applicator Y1: cap

Claims (6)

On the surface of the shaft portion is a cosmetic brush in which a large number of needle-like protrusions extending in the radial direction of the shaft portion are arranged in a column in the axial direction of the shaft portion,
The shaft portion is configured by combining two or more components.
Each of the components is
A plurality of shaft peripheral portions in which needle-like projections injection-molded with resin are formed in a single column in the axial direction of the shaft portion;
An axial core portion that supports the plurality of shaft peripheral portions such that the plurality of shaft peripheral portions are rotationally symmetric with each other in a radial section of the shaft portion;
And a brush for makeup formed by combining the constituent members in the axial region . By combining the shaft core portion of one component member and the shaft core portion of the second component member among the plurality of component members in the shaft region and repeatedly combining the shaft core portions of the remaining component members in the shaft region. The makeup brush according to claim 1 in which said axis part was constituted. Among the plurality of component members, a plurality of the components are configured by combining one component member and two component members by inserting the shaft core portion of one component member between the plurality of shaft peripheral portions of the two component members. The cosmetic brush according to claim 1 or 2, wherein the shaft portion is configured by combining each of the members.   The component member has a shaft peripheral portion, a shaft core portion, and a needle-like projection that form a shaft portion when all the component members are combined, and the shaft peripheral portion is in two or more positions that are rotationally symmetric with each other; and The cosmetic brush according to any one of claims 1 to 3, wherein the brush has a column of needle-like protrusions on at least one surface of the shaft peripheral portion.   The component member has a shaft peripheral portion, a shaft core portion, and a needle-like protrusion that form a shaft portion when all the component members are combined, and the shaft peripheral portion is in two positions that are symmetrical with each other; and The cosmetic brush according to any one of claims 1 to 4, wherein the brush has a column of needle-like protrusions on at least one surface of the shaft peripheral portion.   A cosmetic container provided with the cosmetic brush according to any one of claims 1 to 5.

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