JP4993239B2 - Cosmetic container - Google Patents

Description

  The present invention relates to a cosmetic container having an applicator for taking out and applying an appropriate amount of cosmetic in a container body.

In general, an applicator for applying cosmetics such as mascara, eyeliner, and nail polish basically holds and holds cosmetics on the lower end tip of a shaft body as disclosed in Patent Document 1, for example. While having a coating portion such as a brush shape, a pen shape, a spatula shape, a sponge shape, etc., in order to exert a function of uniformly applying to a predetermined site, the upper end portion of the shaft body is connected to the mouth portion of the container body. When the cap is attached to the cap that is to be closed and not in use (when the mouth is closed with the cap), the application part at the tip is immersed in the cosmetic in the container. It is configured to cover and use the applicator by pulling it out of the container with a cap.
JP 2003-61740 A

  In recent years, various functions have been required for applicators in accordance with the usage of cosmetics. For example, in the case of mascara, the application of brush hair, comb teeth, etc. There has been a demand for an applicator in which the shape and flexibility, or the rigidity of the shaft body are variously combined depending on the usage.

  As a method to meet the above requirements, it is conceivable to form the upper and lower parts of the applicator with different types of synthetic resin, but the operation during use of the applicator requires delicate movements, It is indispensable that there is no rattling or the like and the upper and lower sides are mechanically integrated. Moreover, since it is also a product related to cosmetics, it is necessary that the joining state is not conspicuous in appearance.

  However, since the upper and lower parts are made of different materials, it is difficult to achieve strong bonding by bonding or heat fusion. Normally, the shaft body has a diameter of about several millimeters, so it is mechanically firmly bonded by screwing or the like. There is a problem that it is also difficult to do.

  Accordingly, the present invention was devised to solve the above-described problems in the prior art, and relates to an applicator comprising an upper member and a lower member formed of different types of synthetic resins, while maintaining high productivity while maintaining the shaft. A cosmetic container provided with an applicator having a function according to the purpose of use, with the object of integrating the upper and lower members firmly at the body part and integrating the top and bottom mechanically and externally. The purpose is to do.

Hand stage of the present invention to solve the above technical problem,
A container main body for storing cosmetics, a cap for closing the mouth of the container main body, and an applicator for taking out and applying an appropriate amount of cosmetic in the container main body,
The applicator has a shape in which a shaft body is suspended from a base that is an attachment portion to a cap, and an application portion is attached to the tip of the shaft body,
The applicator is divided into upper and lower parts in the middle of the shaft body, and is composed of at least two members, an upper member and a lower member made of a different synthetic resin,
The lower member is made of a thermoplastic elastomer;
The lower end portion of the shaft of the upper member is reduced in diameter, and a through-hole and a recess that penetrates in the lateral direction are formed in the reduced diameter portion .
The upper member of the upper member lower portion and the lower member upper end is fitted by insert molding injection molding the lower member as an insert member,
The pin member formed through the through hole and the undercut assembly to the recess connect the lower member to the upper member so that it cannot rotate freely and cannot be pulled out, and is the same over the entire height range of the shaft body The outer diameter of the
It is in.

With the above structure of the present onset bright, by forming a through hole penetrating in the transverse direction to the shaft member lower portion of the upper member and the upper member and the insert molding of injection molding a lower member as an insert member, the lower member During the injection molding, the molten resin is cooled and solidified in a state of flowing through the through holes, the lower member is molded, and the applicator is formed together with the upper member that is the insert material. Since the lower member is injection-molded using the upper member as an insert material, the lower end of the shaft body of the upper member and the upper end of the shaft body of the lower member can be brought into a fitted state without gaps, that is, without rattling, and penetrated. The resin solidified in the hole fulfills a pin function, so that the lower end portion of the shaft member of the upper member and the upper end portion of the shaft member of the lower member can be rotated freely and can be brought into a strong fitting state without disconnection.

And Ru can be firmly joined in not name the state of backlash upper and lower members are formed of different materials as described above.

  Moreover, since it is the injection molding which used one member as insert material, both members can be fitted and joined accurately with high precision, maintaining high productivity.

  The diameter, formation position (height position), cross-sectional shape, and the like of the through hole can be appropriately set in consideration of injection moldability, bonding strength, and the like, and the number of through holes formed is limited to one. A plurality of them can be formed.

In addition, the lower end portion of the shaft of the upper member is reduced in diameter, a through-hole penetrating in the lateral direction is formed in the reduced diameter portion, and the lower member is injection-molded using the upper member as an insert material. The diameter of the shaft body of the upper and lower members can be made the same in the fitting portion, and unevenness such as a step can be eliminated on the outer surface of the shaft body in the vicinity of the fitting portion, thus forming an applicator without impairing the appearance. can do.

In addition, by forming a recess such as a circumferential groove in the upper member together with the through hole, the molten resin for the lower member flows into the recess during injection molding, and a hard undercut portion is formed in a solidified state. It can be set as a firm fitting state without rattling.

  In addition, the shape of the recesses, the number of formations, and the like can be appropriately set in consideration of injection moldability, bonding strength, and the like.

In the present onset bright, since the injection molding of the lower member of the upper member as an insert material, with no gaps shaft upper end portion of the shaft lower end portion of the upper and lower members, i.e. no rattling fitting state In addition, the resin solidified in the through-hole performs a pin function, and it is possible to achieve a tight fitting state where both the members are not idle and do not come off, and the upper and lower members are mechanically integrated. It can be made into the state which carried out.

Ru can be firmly joined in not name the state of backlash upper and lower members.

Moreover, since it is the injection molding which used the upper member as the insert material, both members can be fitted and joined accurately with high accuracy while maintaining high productivity.

Further, the diameter of the shaft body of the upper and lower members can be made the same in the fitting portion, and unevenness such as a step can be eliminated on the outer surface of the shaft body in the fitting portion, and an applicator can be formed without impairing the appearance. .

Further, the molten resin for the lower member flows into the concave portion during the injection molding, and a hard undercut portion is formed in a solidified state, so that a firm fitting state with no rattling can be obtained.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a mascara container which is an embodiment of a cosmetic container according to the present invention, and FIG. 1 is a front view showing a part of the entire mascara container. As shown in FIG. 1, the container of the present embodiment has a mouth portion 2, a bottomed cylindrical container body 1 that houses a mascara therein, and a cap that is screwed to close the mouth portion 2. 3 and the applicator 5 that is assembled to the cap 3 and accommodates the brush-shaped application part 8 at the tip in the container body 1 and disposed inside the mouth part 2 and is applied when the applicator 5 is pulled out together with the cap 3. It is comprised from four members of the ironing member 15 for removing the excess mascara adhering to the part 8. FIG.

  FIG. 2 shows the entire applicator 5 used in the present embodiment, which has a shaft body 10 that is suspended from a base portion 6 that fits into the cap 3. The application part 8 is formed.

  The applicator 5 is obtained by joining an upper member 5a and a lower member 5b made of different types of synthetic resins by a fitting portion 7 of the shaft body 10 by insert molding to be described later (FIG. 2, see FIGS. 3A and 3B). In this embodiment, the upper member 5 a including most of the base portion 6 and the shaft body 10 is made of a highly rigid polyoxymethylene resin (Duracon manufactured by Polyplastics), and the lower member includes the coating portion 8 and the lower end portion of the shaft body 10. 5b is made of a thermoplastic polyester elastomer resin (Perprene manufactured by Toyobo Co., Ltd.), and a highly flexible coating portion 8 is formed at the tip of a highly rigid shaft.

Note synthetic resin used for the top and bottom of the member is not limited to this example, Ru can be used to decide from among the various combinations depending on the intended use.

  The applicator 5 of the present embodiment is manufactured by injection-molding the lower member 5b using the upper member 5a previously injection-molded as an insert material. A columnar reduced diameter portion 12 having a reduced diameter is formed at the tip of the lower end portion of the shaft body 10a of the upper member 5a. In addition, a through hole 11a having a circular cross section penetrating in the lateral direction is formed in the reduced diameter portion 12, and a circumferential groove-like recess 13a is formed on a position where the through hole 11a is formed. (See FIGS. 4A and 4B)

  The upper member 5a as described above is used as an insert material, and the lower member 5b is injection-molded so that the reduced diameter portion 12 serves as an insert portion, whereby a synthetic resin for the lower member 5b (in this embodiment, a thermoplastic polyester elastomer) (Resin) covers the peripheral edge of the reduced diameter portion 12 of the upper member 5a in a molten state, and also flows into the circumferential groove-like recess 13a and the through hole 11a, and in the cooled and solidified state, the lower end of the shaft body 10a of the upper member 5a And the fitting part 7 of the shaft body 10b upper end part of the lower member 5b can be made into a state as shown to Fig.3 (a), (b).

That is, first, in the fitting portion 7, the lower end portion of the shaft body 10a of the upper member 5a and the upper end portion of the shaft body 10b of the lower member 5b can be fitted in close contact with each other, and rattling or the like occurs due to joining. Can be eliminated. Further, both made of synthetic resin pin member 11b for the lower member 5b is formed through the through hole 11a, Shujo 13b in the peripheral groove-like recess 13a is in a state of Kumitsui undercut shape, the shaft 10a 10b can be reliably prevented from occurring, and the upper and lower members 5a and 5b are mechanically functioned as an integrally molded product while being formed of different materials.

  In insert molding, if the mold cavities are set so that the outer diameters of both shaft bodies 10a and 10b in the vicinity of the fitting portion 7 are the same, the outer surface of the fitting portion 7 is free of irregularities such as steps. Also, it can be made into an integrally molded product in appearance, and the appearance is not impaired.

  In addition, the effects of the present invention, particularly those relating to the applicator, are not limited to the present embodiment, and are generally exhibited in cosmetic containers having an applicator for applying eyeliner, nail polish, etc., for example. In addition to the brush shape, for example, a pen shape, a spatula shape, a sponge shape or the like can be used for the application part.

  The applicator of the cosmetic container of the present invention can use different types of synthetic resin materials depending on the purpose while maintaining unity mechanically and externally. Cosmetics such as mascara, eyeliner and nail polish Further expansion of use as a container is expected.

It is a front view which partially shows one Example of the cosmetics container of this invention longitudinally. It is a front view which shows the applicator in FIG. It is the (a) half vertical front view and (b) half vertical front view which expand and show the principal part vicinity of the fitting part of the applicator in FIG. It is the (a) half vertical front view and (b) half vertical front view which show the upper member of the applicator in FIG.

DESCRIPTION OF SYMBOLS 1; Container main body 2; Mouth part 3; Cap 5; Applicator 5a; Upper member 5b; Lower member 6; Base part 7; Fitting part 8; Application part 10: Shaft bodies 10a and 10b; Pin body 12; reduced diameter portion 13a; concave portion 13b;

Claims (1)

A container body (1) for storing cosmetics, a cap (3) for closing the mouth (2) of the container body (1), and an appropriate amount of cosmetic in the container body (1) are taken out and applied. And an applicator (5) for
The applicator (5) was suspended from the base (6), which is the attachment to the cap (3), and the shaft (10) was suspended, and the application portion (8) was attached to the tip of the shaft (10). Shape and
The applicator (5) is divided into upper and lower parts in the middle of the shaft body (10), and is formed of at least two members of a different synthetic resin upper member (5a) and lower member (5b),
The lower member (5b) is made of a thermoplastic elastomer,
And an upper member axis of (5a) (10a) diameter lower end portion was reduced diameter portion (12), forming a through hole penetrating laterally into said reduced diameter portion (12) (11a) and recesses (13a) And
The upper member (5a) is used as an insert material, and the lower member (5b) is injection-molded by insert molding.The lower end of the shaft (10a) of the upper member (5a) and the upper end of the shaft (10b) of the lower member (5b) Mating parts,
The pin member (11b) formed through the through hole (11a), and the lower member (5b) can not be idled around the upper member (5a) by the undercut assembly to the recess (13a) . A cosmetic container that is connected so that it cannot be pulled out and has the same outer diameter over the entire height range of the shaft (10).

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