JP2010253045A - Cosmetic applicator - Google Patents

Abstract

[PROBLEMS] To apply cosmetics by thinning each brush of a resin brush part, rounding the surface and tip, and making the waist strength of the entire brush part not too hard or too soft. A cosmetic applicator that is easy to do and does not damage the application surface.
A cosmetic applicator in which a second resin brush portion is attached to the tip of a first resin brush shaft, and the brush portion is attached to the tip of the brush shaft. And a plurality of brushes 44 extending forward from the front end surface of the base end portion 42, and each of the brushes 44 is tapered with a substantially circular cross section. Make the tip round shape. Also, thick brush 44a and thin brush 44b are mixed. The strength of the entire brush portion 40 when applying cosmetics is moderately soft and not too hard, and is excellent in operability and does not damage the lips or skin.
[Selection] Figure 4

Description

  The present invention relates to a cosmetic applicator for applying a liquid cosmetic such as a lip gloss applicator, a liquid lipstick applicator, an eyeliner, an enamel applicator, etc. In particular, the present invention relates to a cosmetic applicator in which a brush portion provided with a large number of brushes is formed of an integrally molded body of resin.

  The following Patent Document 1 discloses a structure as a lip gloss applicator, in which a brush portion obtained by binding and integrating a very thin resin brush called a bristle at the tip of a brush shaft is fixed by a base. ing.

  Also, in Patent Documents 2 and 3 below, as a cosmetic applicator for applying liquid cosmetics such as enamel, a brush portion consisting of a large number of brushes is integrally formed at the tip of a resin brush shaft. Such a structure is disclosed.

JP2003-169713 Japanese Utility Model 6-13714 JP 2004-196371 A

  However, in the said patent document 1, since the process which manufactures a brush, and the process which binds and integrates a brush and manufactures a brush part is required, the problem that a cosmetic applicator is inevitably expensive (1st There was a problem).

  Further, in Patent Documents 2 and 3, since the brush part is integrally formed with the resin at the tip of the brush shaft, the cosmetic applicator can be provided at a low price by reducing the material cost and the number of manufacturing processes, but mainly enamel. Since it is described as an applicator for applying to the nail, it is meaningful to integrally form a brush portion (brush) that requires a certain level of waist strength with a brush shaft made of a relatively hard resin. . However, as the brush part to apply lip gloss (brush), the waist is too stiff, the brush is very thick, is composed of a rectangular or triangular cross section, and the tip of each brush is square Yes. For this reason, there exists another problem (2nd problem) that there exists a possibility of damaging a lip when apply | coating a lip gloss, and it cannot employ | adopt at all.

  Therefore, if the inventor attaches the brush portion formed of a relatively soft resin to the tip of the brush shaft made of a relatively hard resin, the material cost is low and the brush manufacturing process is simplified. As a result, the applicator can be reduced in price (can solve the first problem), the soft resin brush does not damage the lips, and the brush shaft is made of a relatively hard resin. It was thought that good operability could be maintained. Furthermore, if each of the brushes constituting the brush part is made thinner than those of Patent Documents 2 and 3 and the tip is rounded with a substantially circular cross section, the possibility of damaging the lips during application is surely avoided. (The second problem can be solved).

  As a result of making a prototype and verifying its effect, the inventor was confirmed to be effective for the first and second problems described above.

  Even if the inventor forms a brush part with a relatively soft resin in the course of developing a new cosmetic applicator (brush part), all the brushes in the brush part have the same thickness. In this case, the following new problems were raised. That is, if each brush is too thick, the entire brush portion is too hard and easy to apply lip gloss, but it may damage the lips. On the other hand, if each brush is too thin, the entire brush will be too soft and will not damage the lips, but there will be a conflicting problem (third problem) that it is difficult to apply lip gloss. did.

  Therefore, if the inventor mixes thin brush hair and thick brush hair, it is easy to apply lip gloss and does not damage the lips. I thought that the problem could be solved).

  And since the inventor made the prototype and verified the effect, it was confirmed that it was effective with respect to the above-mentioned third problem, and thus the present application has been completed.

  The present invention has been made in view of the above-described problems of the prior art and the above-mentioned knowledge of the inventor. The first object of the present invention is to configure a resin brush portion attached to the tip of the brush shaft. It is intended to provide a cosmetic applicator that does not damage the application surface when applying the cosmetic by forming the surface and tip of each brush round. In addition, the second purpose is to mix thick brush hair and thin brush hair in the brush portion, so that the waist strength of the entire brush portion is not too hard and not too soft. An object of the present invention is to provide a cosmetic applicator that is easy to apply liquid cosmetics and that does not damage the application surface.

  In order to achieve the first object, in the cosmetic applicator according to claim 1, the tip of the first resin brush shaft is softer than the first resin coaxially with the brush shaft. 2 is a cosmetic applicator in which a resin brush portion is attached and integrated, and the brush portion is attached to a tip end portion of the brush shaft, and a front end of the base end portion. It is configured as an integral molded body of resin with a plurality of brushes extending forward from the surface, and each of the brushes has a substantially circular cross section and a tapered shape that is thinner toward the tip side, and the tip is rounded. It was configured in the provided shape.

  (Effect) It is easy to mold the brush part with the base end part and the brush with resin, the work of attaching the brush part to the tip of the brush shaft is easy, and the material cost is low, Because the brush manufacturing process is simplified, the cost of the applicator can be reduced. That is, the first problem described above is solved.

  In addition, it is desirable that the brush shaft, which is the handle portion, be made of a resin that is hard to some extent when operating the applicator. On the other hand, it is desirable that the brush portion (brush), which is a part where cosmetics are applied to the lips and the skin, is made of a soft resin to some extent so as not to damage the lips and the skin. For this reason, the brush shaft is made of a somewhat hard resin (first resin) such as polypropylene, PBT, POM, or relatively hard PA (nylon), and the brush portion (brush) is made of polyethylene or relatively soft PA. It is desirable to use a resin (second resin) that is soft to some extent, such as (nylon), PET, or elastomer.

  And the brush in the brush part composed of a resin that is soft to some extent is not only thin, but also has a substantially circular cross section and a tapered shape that is thinner toward the tip side, and the tip is rounded. Does not hurt lips or skin. That is, the second problem described above is solved. Even if the brush portion (brush) is made of a resin that is soft to some extent, the operability of the applicator is not lowered by making the brush shaft of a resin that is hard to some extent.

  In order to achieve the second object, in claim 2, in the cosmetic applicator according to claim 1, the brush portion is configured such that thick brush hair and thin brush hair are mixed. did.

  (Action) The thin brush has a soft waist and is difficult to draw a contour because it is difficult to draw a contour (inferior in operability), but does not damage the application surface such as lips and skin. On the other hand, a thick brush has a low waist and may damage the application surface such as the lips and skin, but it is difficult to draw a contour and is easy to apply cosmetics. For this reason, as the brush in the brush portion, it is possible to change the waist strength of the brush portion (whole brush) by mixing thick brush hair and thin brush hair and adjusting the ratio thereof. it can. In other words, the ratio of thick and thin brushes to be mixed is adjusted depending on whether operability of the applicator for applying cosmetics or gentleness that does not damage the application surface such as lips and skin is the main. Thus, the waist strength of the entire brush can be made appropriate. That is, the third problem described above is solved.

  According to a third aspect of the present invention, in the cosmetic applicator according to the second aspect of the present invention, the thick brush and the thin brush are distributed substantially uniformly in the brush portion.

  (Action) Since the thin brush with soft waist and the thick brush with hard waist are distributed almost evenly, the strength of the waist of the brush part (whole brush) is not too soft or too hard. It will be a thing.

  According to a fourth aspect of the present invention, the cosmetic applicator according to the second aspect is configured such that a thick brush is disposed closer to the outer side of the brush part and a thinner brush is disposed closer to the inner side.

  (Effects) Because the outer side of the brush part (whole brush) is composed of strong brush (thick brush), when applying cosmetics, the brush part (whole brush) Even when pressed against the coated surface, the brush portion (the entire brush) does not deform more than necessary.

  According to a fifth aspect of the present invention, in the cosmetic applicator according to the second aspect, a thin brush is disposed near the outside of the brush portion, and a thick brush is disposed near the inside.

  (Effect) The brush part (whole brush) is made up of weak brushes (thin brushes) that are close to the outside, so when applying cosmetics, the brush part (whole brush) ) The soft brush of the waist near the outside of the struck the application surface such as lips and skin.

  As is apparent from the above description, according to the cosmetic applicator according to claim 1, the material cost is low, and the applicator can be provided at a low price because the manufacturing process of the brush is simplified.

  In addition, the soft resin brush is not only thin, but it has a tapered taper shape with a substantially circular cross section and a rounded tip, which ensures that the application surface such as lips and skin is not damaged during application. In addition, since the brush shaft is made of a relatively hard resin, the operability as an applicator is excellent, and smooth cosmetic application is possible.

  According to claim 2, the ratio of the thick brush hair and the thin brush hair to be mixed can be adjusted to change the waist strength of the entire brush brush. A cosmetic applicator that meets the various needs of the user can be provided by selecting the desired waist strength of the entire brush in consideration of the characteristics of both gentleness and harmlessness.

  According to claim 3, the strength of the entire brush is not too soft or too hard, and the operability of the applicator for applying the cosmetic and the application surface of the lips, skin, etc. A cosmetic applicator having both characteristics of gentleness without damaging the skin is obtained.

  According to claim 4, when the cosmetic is applied, the entire brush is appropriately deformed into a shape that follows the application surface, but it is not deformed more than necessary, so that it is easy to draw a contour, etc. Becomes easy.

  According to the fifth aspect, when applying the cosmetic, since the soft brush on the lower side of the entire brush mainly hits the application surface such as the lips and the skin, the lips and the skin are hardly damaged.

It is a longitudinal cross-sectional view of the 1st Example of the lip gloss applicator which is a cosmetic applicator which concerns on this invention. It is a principal part disassembled sectional view of the lip gloss applicator. It is a side view of the brush part which is the principal part of the lip gloss applicator. It is an enlarged bottom view (figure which looked at the brush part from the front) of the brush part. It is a longitudinal cross-sectional view of the metal mold | die which injection-molds the same brush part. It is sectional drawing (sectional drawing in alignment with line VI-VI shown in FIG. 5) of the split mold for brush shaping | molding (movable side metal mold | die) of the same brush part. It is an enlarged bottom view (figure which looked at the brush part from the front) which is the principal part of the 2nd example of the lip gloss applicator which is a cosmetics applicator concerning the present invention. It is an expanded bottom view (figure which looked at the brush part from the front) which is the principal part of the 3rd Example of the lip gloss applicator which is a cosmetic applicator which concerns on this invention. It is an expanded bottom view (figure which looked at the brush part from the front) which is the principal part of the 4th Example of the lip gloss applicator which is a cosmetics applicator which concerns on this invention. It is an enlarged bottom view (figure which looked at the brush part from the front) which is the principal part of the 5th Example of the lip gloss applicator which is a cosmetics applicator concerning the present invention. It is an enlarged bottom view (figure which looked at the brush part from the front) which is the principal part of the 6th Example of the lip gloss applicator which is a cosmetics applicator which concerns on this invention. It is an expanded bottom view (figure which looked at the brush part from the front) which is the principal part of the 7th Example of the lip gloss applicator which is a cosmetic applicator which concerns on this invention. It is an expanded bottom view (figure which looked at the brush part from the front) which is the principal part of the 8th Example of the lip gloss applicator which is a cosmetics applicator which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described based on examples.

  1 to 6 show a first embodiment of a cosmetic applicator according to the present invention, and FIG. 1 is a longitudinal sectional view of a first embodiment of a lip gloss applicator that is a cosmetic applicator, FIG. Is an exploded cross-sectional view of the main part of the lip gloss applicator, FIG. 3 is a side view of the brush part which is the main part of the lip gloss applicator, and FIG. 4 is an enlarged bottom view of the brush part (front side of the brush part). FIG. 5 is a longitudinal sectional view of a mold for injection molding the brush portion, and FIG. 6 is a sectional view of a divided mold for molding the brush portion (movable mold) (FIG. 5). FIG. 6 is a cross-sectional view taken along line VI-VI shown in FIG.

  In these drawings, particularly in FIGS. 1 and 2, reference numeral 10 denotes a cylindrical elongated cosmetic container in which the lip gloss liquid L is accommodated, and a brush shaft having an inner diameter smaller than the inner diameter of the container 10 is inserted above the container. A mouth portion 12 is provided, and a male screw portion 13 is formed on the outer periphery of the mouth portion 12 so that a female screw portion 33 of a cap 32 integrated with a rear end portion of the writing shaft 30 can be screwed together. Yes.

  A hole 37 that opens forward is provided at the tip of the shaft portion 36 of the polypropylene brush shaft 30, and a brush portion 40 made of polyethylene is integrally attached to the hole 37.

  The brush portion 40 includes a substantially cylindrical base end portion 42 and a large number of thin brush tips 44 extending in parallel from the front end face 42a of the base end portion 42 as an integrally molded body of polyethylene resin. ing. And after inserting the base end part 42 of the brush part 40 in the hole 37 at the front-end | tip part of the axial part 36 of the brush shaft 30, plastic deformation of the circumferential direction several places of the front-end | tip part of the brush axis 30 (shaft part 36) is carried out plastically. The brush portion 40 (the base end portion 42 thereof) is fixed to the brush shaft 30 by the dowel caulking 38 to be performed.

  In this way, the brush shaft 30 that is the handle portion is made of a resin (polypropylene) that is hard to some extent in consideration of the operability of the applicator, and on the other hand, the brush portion 40 that is a part that applies lip gloss to the lips. (Brush 44) is made of a resin (polyethylene) that is soft to some extent so as not to damage the lips.

  Reference numeral 43 is a ring-shaped concave strip provided on the outer peripheral surface of the base end portion 42, which will be described in detail later. As shown in FIG. When the mold is opened after injection molding by engaging with a ring-shaped protruding portion 52 provided on the inner peripheral surface of the cavity C1 of the mold 50A in the axial direction, ) With respect to the cavity C1, and functions to secure the release of the molded brush 44 from the movable mold 50B (the cavity C2 thereof).

  Reference numeral 14 denotes a flexible plastic-made cylindrical inner plug 14 fitted in the mouth portion 12 of the container 10, near the inner lower end of the inner plug 14 protruding into the container 10. The wiper 15 is formed by scraping off and cleaning the excess lip gloss liquid L adhering to the shaft portion 36 and the brush 44 of the brush shaft 30 when the brush shaft 30 is extracted from the container 10.

  Moreover, the brush 44 of the brush part 40 is comprised by all 27 pieces arrange | positioned at substantially equal intervals, as expanded and shown to FIG. It is substantially circular and has a tapered shape (the outer diameter on the base side is 0.4 mm, the outer diameter on the front end side is 0.2 mm, the extension length is 11 mm), and the tip is rounded.

  Further, as shown in FIGS. 3 and 4, each brush 44 is arranged on the front end surface (outer diameter 3.4 mm) 42 a of the base end portion 42 having a total length of 9 mm at the same pitch in the left-right direction (for example, 0.7 mm pitch). Thus, five rows are arranged at equal intervals in the vertical direction (for example, 0.5 mm intervals). The first, third, and fifth rows from the top and bottom in which five brushes are arranged at equal pitches in the left and right direction and the second and fourth from the top and bottom in which six brushes are arranged at equal pitches in the left and right direction. In the row, the brush 44 is arranged with a half-pitch (0.35 mm) shift in the left-right direction.

  As described above, the brush 44 in the brush portion 40 made of a relatively soft resin is not only thin, but also has a substantially circular cross section and a tapered shape that is thinner toward the tip side, and the tip is rounded. Therefore, it does not hurt the user's lips when applying the lip gloss.

  In addition, in order to mold the brush 44 of the brush portion 40, it is necessary to provide a very thin high-precision hole (a hole for molding the brush) in the molding die. Since it is very difficult to drill a hole with high accuracy, the split mold structure shown in FIGS.

  That is, reference numeral 50 in FIGS. 5 and 6 is a mold for injection-molding the brush portion 40, and is movable and can move toward and away from the fixed mold 50A and the fixed mold 50A (sliding in the left-right direction). It is comprised by the side metal mold | die 50B. In the fixed mold 50A, one cylindrical cavity C1 for forming the base end 42 of the brush section 40 is provided, and in the movable mold 50B, the brush section that communicates with the cavity C1. Twenty-seven elongated cavities C2 for molding 40 brushes 44 are provided at approximately equal intervals. The fixed mold 50A is provided with a resin injection port 51. With the molds 50A and 50B being clamped, the molten resin injected from the resin injection port 51 as shown by the arrows in FIG. The cavities C1 and C2 in the mold 50 (50A and 50B) are filled.

  PL in FIG. 5 indicates a parting line of the mold 50 (50A, 50B). When the brush portion 40 which is an injection molded product in the mold 50 is cooled, the movable side mold 50B is separated from the fixed side mold 50A, and the molded brush 44 is moved to the movable side mold 50B (cavity). Open the mold to be separated from C2). Since the formed concave strip 43 on the base end portion 42 side is engaged with the ring-shaped convex strip 52 formed on the inner peripheral surface of the cavity C1, the brush portion 40 is opened when the mold is opened. (The base end portion 42) is retained by the fixed mold 50A to prevent the molded brush 44 from being separated from the movable mold 50B (the cavity C2). Thereafter, a protrusion pin (not shown) provided on the fixed-side mold 50A is driven to protrude the brush portion 40 (the base end portion 42) toward the opening side (left direction in FIG. 5) of the mold 50A. Thus, the brush part 40 (the base end part 42) can be separated from the fixed mold 50A.

  As shown in FIGS. 5 and 6, the movable side mold 50 </ b> B is composed of six stages of divided molds 54 </ b> A to 54 </ b> F stacked and integrated in the vertical direction. On the upper and lower side surfaces of the divided molds 54A to 54F that are in close contact with each other, there are formed thin concave grooves 55 that match the shape of the brush 44 divided vertically, and the pair of concave grooves 55, 55 corresponding to the upper and lower sides. A brush forming cavity C2 is defined. That is, five cavities C21 for molding the five brushes 44 in the first row from the top in the vertical direction of FIG. 4 are defined by the divided molds 54A and 54B. Six cavities C22 for molding the six brushes 44 in the second row from the top are defined, and the five brushes 44 in the third row from the top in the vertical direction in FIG. 4 are formed by the divided molds 54C and 54D. 5 cavities C23 are formed, and six cavities C24 for forming the six brushes 44 in the fourth row from the top and bottom in FIG. 4 are defined by the divided molds 54D and 54E. The divided molds 54E and 54F define five cavities C25 for molding the five brushes 44 in the fifth row from the top in the vertical direction in FIG.

  FIGS. 7 to 13 show second to sixth examples of the cosmetic applicator according to the present invention. In any of the examples, the brush part has a thick brush and a thin brush. It is configured to be mixed.

  First, FIG. 7 is an enlarged bottom view of the brush portion that is a main part of the second embodiment of the lip gloss applicator (a view of the brush portion as viewed from the front), and is an embodiment corresponding to claim 4. is there.

  In this embodiment, the brush of the brush portion 40A is composed of a thick brush 44a arranged on the outer side and a thin brush 44b arranged on the inner side.

  The thin brush 44b, like the brush 44 in the first embodiment described above, has a substantially circular cross section and a tapered shape that is thinner toward the tip side (outer diameter 0.4mm on the base side, outer diameter 0.2mm on the tip side). , Extending length 11 mm), and the tip is rounded.

  On the other hand, the thick brush 44a has a substantially circular cross section and has a tapered shape (the outer diameter on the base side is 0.5 mm, the outer diameter on the front side is 0.3 mm, and the extension length is 11 mm). A roundness is provided.

  Other configurations are the same as those of the first embodiment, and the same reference numerals are given, and the duplicated explanation is omitted.

  In the applicator of the second embodiment, the outer side of the entire brush constituting the brush portion 40A is composed of the thick brush 44a having a strong waist, so when applying lip gloss, Even if the entire bristles are pressed against the application surface, the entire brush will be appropriately deformed into a shape following the application surface, but it will not be deformed more than necessary, so that the lip gloss can be applied smoothly.

  FIG. 8 is an enlarged bottom view of the brush portion (a view of the brush portion as viewed from the front), which is the main part of the third embodiment of the lip gloss applicator, and is an embodiment corresponding to claim 5.

  In the applicator of this embodiment, the brush of the brush portion 40B is composed of the thin brush 44b disposed closer to the outer side and the thick brush 44a disposed closer to the inner side. Other configurations are the same as those of the first embodiment, and the same reference numerals are given, and the duplicated explanation is omitted.

  In the applicator of the third embodiment, since the outer side of the entire brush constituting the brush portion 40B is composed of thin brush 44b having a weak waist, when applying lip gloss, The soft, thin brush 44b near the outer side of the entire brush hits the application surface of the lips, and the lips are less likely to be damaged.

  9 and 10 are enlarged bottom views (views of the brush portion viewed from the front) of the brush portion, which is a main part of the fourth and fifth embodiments of the lip gloss applicator.

  In FIGS. 9 and 10 in which the brush portions 40C and 40D are viewed from the front, the brushes are arranged in parallel in five rows in the vertical direction, but in the fourth embodiment shown in FIG. The thick brush 44a is arranged in the third and fifth rows, and the thin brush 44b is arranged in the second and fourth rows from the top and bottom. That is, the thin brush brush 44b (second and fourth rows) is arranged between the thick brush brush 44a (first, third and fifth rows).

  Other configurations are the same as those of the first embodiment, and the same reference numerals are given, and the duplicated explanation is omitted.

  In the fourth embodiment, since the thick brush 44a having a stiff waist is arranged on the wide side (upper and lower sides) of the entire brush constituting the brush part 40C, the brush shaft 30 ( When applying the lip gloss by moving the brush part 40C), the tip of the brush part 40C is appropriately deformed to follow the application surface even if the entire brush is pressed against the application surface, but it deforms more than necessary. The lip gloss can be applied smoothly.

  On the other hand, in the fifth embodiment shown in FIG. 10, thin brushes are arranged in the first, third and fifth rows from the top and bottom, and thick brushes are arranged in the second and fourth rows from the top and bottom. . That is, the rows of thick brush 44b (second and fourth rows) are arranged between the rows of thin brush 44b (first, third and fifth rows).

  Other configurations are the same as those of the first embodiment, and the same reference numerals are given, and the duplicated explanation is omitted.

  In the fifth embodiment, the thin brush 44b with soft waist is arranged on the wide side (upper and lower sides) of the entire brush constituting the brush part 40D. When the lip gloss is applied by moving the hair 40D), the soft thin brush 44b on the outer side of the entire brush mainly hits the lips (application surface thereof), and the lips are hardly damaged.

  Moreover, the thick brush 44a with strong waist arranged between the rows of thin brush 44b with weak waist (second and fourth rows) deforms more than necessary on the tip side of the brush portion 40D (the entire brush). Since it prevents it, it is easy to draw a contour and lip gloss can be applied smoothly.

  FIG. 11 is an enlarged bottom view of the brush portion (a view of the brush portion as viewed from the front), which is a main part of the sixth embodiment of the lip gloss applicator that is a cosmetic applicator, and corresponds to claim 3. There is an example to do.

  In this embodiment, the brushes arranged in five rows in the vertical direction are arranged so that the thick brush 44a and the thin brush 44b alternate in the left-right direction, and the fifteen thick brushes 44a having a stiff waist The twelve soft and thin brushes 44b have a structure in which the brushes 44b are distributed almost evenly. In addition, it is suitable for the kindness that does not damage the lips, and it is neither too hard nor too soft.

  Other configurations are the same as those of the first embodiment, and the same reference numerals are given, and the duplicated explanation is omitted.

  12 and 13 are enlarged bottom views (views of the brush portion viewed from the front) of the brush portion, which is a main part of the seventh and eighth embodiments of the lip gloss applicator that is a cosmetic applicator. .

  In the brush portion 40F of the seventh embodiment shown in FIG. 12, the thick brush 44a having a circular cross section in the brush portion 40A of the second embodiment shown in FIG. 6 is elliptical in cross section and thick in a tapered shape. In the brush portion 40G of the eighth embodiment shown in FIG. 13, the thick brush hair 44a having a circular cross section in the brush portion 40C of the third embodiment shown in FIG. The second embodiment is different from the second and third embodiments in that the brush brush 44c has an elliptical cross section and a tapered shape. Others are the same as those in the second and third embodiments, respectively, and the same reference numerals are given to omit redundant description.

  In the second and third embodiments described above, the thick brush 44a has a circular cross section, and therefore the flexibility of the brush 44a in any of the oblique directions of FIGS. Are the same. For this reason, even if the brush part 40A (40B) is moved in any of the upper, lower, left, and right diagonal directions in FIG. 7 (FIG. 8), there is no great difference in the strength of the waist in the brush part 40A (40B). In the seventh and eighth embodiments, since the thick brush 44c is formed in an elliptical cross section, the waist strength of the entire brush differs greatly depending on the direction in which the brush portions 40F and 40G are moved. .

  That is, in the seventh (eighth) embodiment, the brush having the elliptical cross section that forms the wide side surface (arranged along the wide side surface) of the entire brush constituting the brush portions 40F and 40G. 44c is more easily deformed in the vertical direction than the horizontal direction in FIGS. 12 and 13 (it is more difficult to deform in the horizontal direction than in the vertical direction), so that the entire brushes constituting the brush portions 40F and 40G are as shown in FIG. , 13 is easily deformed in the vertical direction and is difficult to deform in the left-right direction. Therefore, in order to draw a contour, the brush portions 40F and 40G are moved in a direction in which a certain level of waist strength functions (the left and right directions in FIGS. 11 and 12). By moving the brush portions 40F, 40G in the vertical direction (12, 13), the strength of the entire brush of the brush portions 40F, 40G can be used properly according to the application.

  In addition, in the seventh embodiment shown in FIG. 12, a thick brush 44c having an elliptical cross section is arranged on the outside of the thin brush 44b on the inside, and the brush portion 40F is formed when applying lip gloss. Although the entire brush brush is appropriately deformed into a shape following the application surface, it does not deform more than necessary, so that the lip gloss can be applied smoothly, such as easy to draw a contour, as described in the second embodiment (FIG. 7). See).

  Further, in the eighth embodiment shown in FIG. 13, the thin brush 44b is arranged outside the thick brush 44c having an elliptical cross section on the inner side, and when applying lip gloss, the brush is mainly used. Similar to the third embodiment (see FIG. 8), since the soft thin brush 44b near the outside of the entire brush constituting the part 40G hits the lips (application surface thereof), the lips are not easily damaged. is there.

  In the various embodiments described above, the brush shaft 30 is made of polypropylene resin and the brush portion 40 is made of polyethylene resin. However, the brush shaft 30 may be made of a resin that is hard to some extent other than polypropylene resin (for example, PBT). , POM, relatively hard PA (nylon), etc., and the brush portion 40 is made of a soft resin other than polyethylene (for example, PET, relatively soft PA (nylon), elastomer, etc.). It may be configured.

  Further, in the above-described embodiment, as an example of a method for attaching the brush portion 40 (the base end portion 42) to the tip of the brush shaft 30, the dowel crimping has been described. However, the present invention is not limited to this. Adhesion or other known attachment methods may be used.

  In the above-described embodiments, the cosmetic applicator according to the present invention has been described as a lip gloss applicator. However, the cosmetic applicator for applying liquid cosmetics such as a liquid lipstick applicator, an eyeliner, and an enamel applicator. There may be.

  It can be widely applied to cosmetic applicators such as lip gloss applicators, liquid lipstick applicators, eyeliners, and enamel applicators that apply cosmetics to sensitive surfaces such as lips and skin.

30 Brush shaft 40, 40A, 40B, 40C, 40D, 40E, 40F, 40G Brush portion 42 Base end portion 44 Brush 44a Thick brush 44b Thin brush 44c Thick brush 50 having an elliptical cross section Brush portion molding 50A mold for molding the base end of the brush part (fixed side mold)
50B Brush mold for the brush part (movable side mold)

Claims (5)

  A cosmetic applicator in which a brush portion made of a second resin that is softer than the first resin is attached to and integrated with a tip of a first resin brush shaft coaxially with the brush shaft, The brush portion is configured as an integrally molded resin body including a base end portion attached to the tip of the brush shaft and a plurality of brush brushes extending forward from a front end surface of the base end portion. In addition, each of the brushes has a substantially circular cross section, a tapered shape that is thinner toward the tip side, and a rounded tip. The cosmetic applicator according to claim 1, wherein a thick brush and a thin brush are mixed in the brush portion. The cosmetic applicator according to claim 2, wherein thick brush hairs and thin brush hairs are distributed substantially uniformly in the brush portion. The cosmetic applicator according to claim 2, wherein a thick brush is disposed near the outside of the brush portion, and a thin brush is disposed near the inside. The cosmetic applicator according to claim 2, wherein a thin brush is disposed near the outside of the brush portion, and a thick brush is disposed near the inside.

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