The present invention relates to a cosmetic brush, and in particular, to a cosmetic brush provided with a brush portion formed of core wires twisted to hold therebetween a plurality of bristles.
As shown in
On the other hand, a cosmetic brush provided with gaps of bristles by thinning out the bristles that expand randomly in the brush portion axial direction is known. In Patent Literature 1, by using core wires each having a circular cross section and twisting the core wires while pinching end portions of the bristles instead of central portions of the bristles, the bristles extend from every other twisted portions of the core wires, and the gaps of the bristles are formed. In Patent Literature 2, in a general type cosmetic brush whose core wire has a circular cross section as described above, an extra coil spring member is fittingly added to the brush portion in a post-process for changing directions of the bristles, and providing the gaps of the bristles.
Patent Literature 1: JPU 48-114656
Patent Literature 2: JPA 2010-69022
However, in the cosmetic brush of Patent Literature 1, the bristles appear from every other twisted portion, so that a volume of the bristles is small. Moreover, since gaps of the bristles in the brush portion axial direction are too wide, an amount of cosmetic liquid pooled in the gaps increases, which results in solid chunks of the cosmetic liquid adhering to eyelashes. In the cosmetic brush of Patent Literature 2, the extra member is needed, so that the number of brush components and working man hours for manufacture are increased.
The present invention has been made to solve the above-described problems in conventional technologies, and an object thereof is to provide a cosmetic brush that is provided with gaps in between groups of bristles in the brush portion axial direction, with an appropriate pool-amount of cosmetic liquid, without any extra members.
In order to solve the problems described above, in a mode of the present invention, a cosmetic brush includes a brush portion formed of deformed core wires each having a non-circular cross section, the deformed core wires twisted to hold therebetween a plurality of bristles, wherein the bristles extend from twisted portions of the deformed core wires and split into two parts with respect to the brush portion axial direction.
In the cosmetic brush, it is also preferable that the brush portion has the twisted portions adjacent to each other in the brush portion axial direction, and bristles extending from the twisted portion toward another neighboring twisted portion are in contact with bristles extending from the another twisted portion toward the one twisted portion.
In another mode of the present invention, a cosmetic brush includes a brush portion formed of core wires that are twisted to hold therebetween a plurality of bristles, wherein the core wires are deformed core wires each having a non-circular cross section, and a pitch of twisted portions of the deformed core wire is formed wider in comparison with a pitch of twisted portions of core wires of which each cross section has a circular shape having the same wire diameter or the same cross-sectional area of the deformed core wires.
According to the cosmetic brush of the present invention, its core wires are made up of deformed core wires each having a non-circular cross section, bristles that extend from twisted portions of the deformed core wires split into two parts in the brush portion axial direction. Therefore, a space formed between the split bristles becomes a gap of the bristles, so that gaps of the bristles can be formed in the brush portion axial direction.
In the inventive cosmetic brush, with respect to the brush portion radial direction, the bristles extend from respective helically twisted portions of the deformed core wires, so that the volume of the bristles portion is substantially the same as that of a conventional cosmetic brush. Moreover, the inventive cosmetic brush does not need any extra members for forming gaps of the bristles. The inventive cosmetic brush is formed of deformed core wires and formed by a manufacturing process similar to that of a conventional cosmetic brush, so that the number of brush members and working man hours are maintained.
When the inventive cosmetic brush is used to apply a cosmetic liquid such as a mascara liquid to eyelashes, the eyelashes are gathered and applied the cosmetic liquid in bundle in the successive gaps of the bristles distributed at a constant pitch in the brush portion axial direction, so that the eyelashes are finished in a well-bundled manner. Furthermore, when moving the cosmetic brush from the roots to the tips of eyelashes, the bristles act as a comb, so that long eyelashes keeping the well-bundled manner over the whole positions can be obtained.
Moreover, since each group of the bristles split into two parts, bristles that extend from the twisted portion toward the another neighboring twisted portion are in contact with bristles from the another twisted portion toward the one twisted portion. Such contact portions of the bristles fit eyelashes well in applying a cosmetic finely to every detail of eyelashes.
Furthermore, since the deformed core wires each has a non-circular cross section is used, twisted portions of the deformed core wires have a preferable inclination and a larger pitch in the brush portion axial direction than a pitch of twisted portions of core wires each having a circular cross section of the same diameter or of the same cross-sectional area of the deformed core wires. Therefore, bristles that extend from the twisted portions of the deformed core wires can be spread in the brush portion axial direction in comparison with that of the core wires having the circular cross section described above. Thus, a larger liquid-pool space of the brush portion is provided in the brush portion, which can contain a larger amount of cosmetic liquid in comparison with a brush portion of core wires having a circular cross section.
Next, a preferred embodiment of the present invention is described based on the drawings.
A cosmetic brush 1 of the first example includes, as shown in
The cosmetic brush 1 is formed by, as shown in
Accordingly, the cosmetic brush 1 has a form of the bristles 5 as shown in
Next, advantages of application of a cosmetic liquid 12 by using the cosmetic brush 1 described above are described.
Further, as shown in the figure, a liquid-pool space of the cosmetic brush 1 is mainly formed of the respective bristles 5 to which the liquid is adhered and gaps 6 of the bristles split into two parts, so that an amount of the cosmetic liquid 12 retained by the cosmetic brush 1 according to the present example is larger than that retained by the conventional cosmetic brush shown in
A cosmetic brush 1 according to a second example uses deformed core wires 3i in the same manner as in the first example, and a length of bristles 5 sandwiched by the deformed core wires 3i and 3i are designed to a predetermined length so that contact portions 8 of the bristles are formed. Components common to those in the first example are designated by the same reference symbols, and description thereof is omitted. In the brief schematic view of
The brush portion 10 according to the second example is formed so that bristles 5d extending from one twisted portion 4A to the other twisted portion 4B, the twisted portions 4A and 4B adjacent to each other in the brush portion axial direction P, and bristles 5u extending from the other twisted portion 4B to the one twisted portion 4A, cross each other.
In the present example as well, similar effects as in the first example are obtained. In addition, eyelashes 11 tangle well in the contact portions 8 of the bristles, so that a detailed work to apply a cosmetic liquid to portions such as eyelashes at the inner corner and the tail of the eyes to which a cosmetic liquid is not easily applied can be performed.
The degree of contact of the bristles with the contact portions 8 is not limited to crossing as in the case of the present example, but may make contact with only tip end portions of the bristles 5 or crossing of the central portions or base end portions of the bristles 5. The degree of contact can be arbitrarily changed to these variations by adjusting the lengths of the bristles 5. The contact portions 8 of the bristles may be formed at a part of the brush portion 10. That is, depending on the form of the brush portion 10, contact portions and non-contact portions may be mixed.
The bristles 5 to be adopted in the first and second examples described above may be fibers of a synthetic resin, animal or plant hairs, etc., and solid and hollow fibers and variations of cross-sectional shapes of the fibers may also be used. Preferably, as the bristles 5, soft fibers are used. More preferably, as the bristles 5, unstretched synthetic fibers produced without a stretching step after an extruding step in a bristle manufacturing process are used. Details of the unstretched fibers are not described here since they are described in Japanese Patent No. 5100985. The unstretched fibers low in rigidity are preferably used since binding forces from the deformed core wires 3i are easily reflected in the fibers when they are sandwiched by the deformed core wires 3i and 3i and twisted.
In the first and second examples described above, the cosmetic brush 1 is described as a cosmetic brush to apply a mascara liquid, however, it can also be applied to other cosmetic liquids.
Next, other effects to be obtained by using the deformed core wires 3i for the cosmetic brush 1 described above are described.
The brush portion 10b is obtained by using the deformed core wires 3i, the brush portion 10a is obtained by using core wires each having a circular cross section and the same wire diameter “d” as the deformed core wires 3i, and the brush portion 10c is obtained by using core wires each having a circular cross section and substantially the same cross-sectional area A as the deformed core wire 3i.
As shown in the upper stage of
A reason for this is that, as shown in the lower stage of
Thereby, in the brush portion 10b, the bristles 5 are more widely distributed in the brush portion axial direction P than the bristles in the brush portion 10a or brush portion 10c, and accordingly, a larger liquid-pool space of the brush portion 10b is provided, which can contain a larger amount of cosmetic liquid.
Conventionally, when it is desired to increase the pitch of the twisted portions 4 of the core wires, core wires with a thick wire diameter could only be selected, however, even if the wire diameter is the same, the pitch of the twisted portions 4 of the core wires can be increased by using the deformed core wires 3i as core wires.
1: cosmetic brush, 3i: deformed core wire, 4: twisted portion, 5: bristle, 6: gap of bristles, 7: crest portion of bristles, 8: contact portion of bristles, 10: brush portion, 11: eyelash, 12: cosmetic liquid, P: brush portion axial direction, R: brush portion radial direction, d: wire diameter of core wire, A: cross-sectional area of core wire, h: pitch of twisted portions of core wires
Number | Date | Country | Kind |
---|---|---|---|
PCT/JP2015/058480 | Mar 2014 | JP | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/JP2014/083532 | 12/18/2014 | WO | 00 |