JP2020039484A - Cosmetic container - Google Patents

Abstract

To provide a cosmetic container that is capable of preventing solidification of application liquid and preventing internal pressure rise in the feeding.SOLUTION: A cosmetic container is provided in which liquid is received in a container body 10, and the liquid in the container body is fed to an application body 18 through a pipe 16 by a feeding mechanism when an operation part is operated. A tip of the application body is projected from a tip opening 20a of a leading axle 20 for covering an application body, and the pipe is arranged rearward from the tip opening of the leading axle. The tip position of the pipe is characterized by satisfying an expression 1.5<Vcosθ×(D/A)<10 (where, A: a tip opening area (mm) of the leading axle, D: an area (mm) of the pipe inner diameter, V: a volume (mm), from the pipe tip to the leading axle tip, and θ: an average angle (°) formed by the line connecting the pipe tip with the leading axle tip inside and an axis line).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cosmetic container for applying a liquid cosmetic such as an eyeliner.

  Conventionally, in an applicator in which a coating body is provided on the tip of the tip of a shaft body in which cosmetics are stored therein, when used, the application liquid contained in the shaft is sent to a coating body such as a brush to apply the coating liquid. A technique for enabling the attachment is disclosed (Patent Document 1).

  In a cosmetic container, a liquid cosmetic composition for eye makeup that can be drawn with a low viscosity with little dripping (spot dripping) on the skin even when applied to the brush body application body is disclosed (: Patent Reference 2, Patent Document 3).

  In some cosmetic containers, a liquid guide pipe is inserted from the rear end into the center of the brush main body where the fibers are converged, and a substantially central portion of the brush main body is melted at a position rearward from the front end of the liquid guide pipe ( : Patent Document 4).

JP 2012-157611 A JP, 2017-114824, A JP 2017-114825 A Japanese Utility Model Publication No. 1-69681

  However, if the low-viscosity cosmetic liquid is solidified at the tip of the application body or inside the liquid guide pipe, if the operation of feeding the application liquid is continued as it is, the internal pressure increases, and the pressure builds up. Further, when the solidified portion is broken by the feeding operation, the coating liquid may scatter from the coating body.

  The present invention has been made in view of the above circumstances, and has as its object to provide a cosmetic container capable of preventing solidification of a coating solution and preventing an increase in internal pressure during feeding.

The present invention is a cosmetic container in which a liquid is stored in a container main body, and the liquid in the container main body is fed out by a feed-out mechanism when an operation unit is operated.
The tip of the coating body protrudes from the tip opening of the front shaft that covers the coating body, a pipe is disposed behind the front opening of the tip shaft, and the tip position of the pipe is expressed by the following formula (I).
1.5 <Vcos θ × (D / A) <10 (I)
Where A is the area of the tip opening of the tip shaft (mm ² )
D: Area of pipe inner diameter (mm ² )
V: Volume from the tip of the pipe to the tip of the tip shaft (mm ³ )
θ: Average angle (°) between the line connecting the pipe tip and the inside of the tip shaft and the axis
It is a cosmetic container characterized by satisfying.

In the present invention, an aqueous emulsion of an acrylic acid polymer having a glass transition point of 20 ° C or lower obtained by polymerizing monomers selected from acrylic acid monomers, methacrylic acid monomers, acrylate monomers, and methacrylate monomers, The surface tension is 30 to 45 mN / m, the viscosity at a temperature of 25 ° C. measured by a cone-plate viscometer and the shear rate is 3.83 s ⁻¹ is 50 to 700 mPa · s, and the viscosity at the shear rate 383 s ⁻¹ is 5 to 70 mPa. It is preferable that the liquid cosmetic composition as s is contained.

  According to the cosmetic container of the present invention, the tip of the application body protrudes from the tip opening of the tip shaft that covers the application body, and a pipe is disposed behind the tip opening of the tip shaft. Since it retreats from the front end opening of the front shaft, the drying and solidification in the pipe can be reduced. In addition, since the clearance between the tip shaft and the periphery of the applied body is increased, a flow path when the applied body is solidified can be secured. Therefore, it is possible to achieve excellent effects such as that the liquid can be ejected from the tip of the tip shaft using the clearance as the flow path.

BRIEF DESCRIPTION OF THE DRAWINGS It is the whole explanatory view of the cosmetics container which concerns on embodiment of this invention, (a) is a side view in the state which removed the cap, (b) is a longitudinal cross-sectional view. FIG. 3 is a detailed cross-sectional view of the periphery of an application body, a tip shaft, and a pipe of a cosmetic container. The evaluation results of the cosmetic container of the embodiment are shown in the table.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is an overall explanatory view of a cosmetic container according to an embodiment, FIG. 2 is a detailed cross-sectional view of a periphery of an applied body, a tip shaft, and a pipe of the cosmetic container, and FIG. 3 shows an evaluation result.

  As shown in FIG. 1, in the cosmetic container, the liquid of the cosmetic is stored in the storage unit 22 of the container main body 10, and when the operation unit 12 is operated, the liquid in the storage unit 22 is discharged by the feeding mechanism 14. In the cosmetic container from which the application body 18 is fed out through the pipe 16, the front end 18 a of the application body 18 protrudes from the front end opening 20 a of the front shaft 20 that covers the application body 18, and from the front end opening 20 a of the front shaft 20. Also, a pipe 16 is disposed rearward, and the inside of the space on the tip side of the front shaft 20 is substantially filled with the coating body 18.

  The cosmetic container according to the embodiment is a dispensing container provided with a rotary dispensing mechanism 14, and as shown in FIG. 1, a cylindrical storage part ( The cosmetic is stored in the tank 22, and the liquid in the storage 22 is fed out and sent to the application body 18 by rotating the operation unit 12.

[Delivering mechanism 14]
The feeding mechanism 14 rotates the operation unit 12 serving as a crown disposed at the rear end of the container body 10 in the circumferential direction with respect to the container body 10, thereby advancing the piston body 24 to advance the storage unit 22. The cosmetics inside are paid out.

  More specifically, the feed-out mechanism 14 includes an operating portion 12 rotatably fitted to the rear end of the container body 10 and a screw having an external thread formed on the outer periphery rotatably connected to the distal end of the piston body 24. A rod 26, a substantially nut-like screw body 28 having a female screw fixed to the container body 10 in the rotation direction and screwed with the screw rod 26, and a rotation operation of the operation unit 12 with respect to the container body 10 by a user (user) And a driving cylinder 30 for transmitting a force to the screw rod 26. A ratchet mechanism is provided at the tip of the driving cylinder 30 to transmit a rotational force in one direction to the screw rod 26.

[Container body 10, storage section 22]
The distal end portion 10a of the container body 10 has a stepwise small diameter, and a small-diameter tube portion 10c protrudes rearward from the wall-like portion 10b therein. A generally cylindrical joint 32 is disposed around the pipe 10c, and the distal end of the storage unit 22 is fitted to the pipe 10c via the joint 32.

[Applying body 18, tip shaft 20, pipe 16]
In the cosmetic container, as shown in FIG. 2, an application body 18, a front shaft 20, a pipe 16, a joint 32, and a pipe fixing body 34 are attached to a distal end portion 10a of the container body 10.

  Specifically, a tapered tip shaft 20 is fitted to the front end portion 10a in a space on the front side from the wall-shaped portion 10b, and an application body 18 made of brush is disposed in the tip shaft 20. .

  A pipe fixing body 34 for fixing the pipe 16 and locking the coating body 18 in the front shaft 20 is provided behind the coating body 18.

  The coating body 18 can be made of various materials such as a brush ear structure and a porous body made of natural fibers and synthetic resin fibers bundled. As the fiber, a fiber of 0.05 to 0.2 (mm) can be suitably used.

  The pipe 16 is partially inserted into the application body 18. Various materials such as resin and metal can be used for the material of the pipe 16.

  In the distal end portion 10 a of the container body 10, the inside of the storage portion 22 communicates with the application body 18 through the pipe portion 10 c, the pipe fixing body 34, and the hollow hole in the pipe 16.

  In the cosmetic container, a storage liquid 22 (in the embodiment, a liquid liquid cosmetic) is stored in the storage section 22 in the shaft main body 10.

  Therefore, in the cosmetic container, the liquid cosmetic discharged from the reservoir 22 is discharged through the pipe 16 into the tip of the application body 18 and can be applied by the application body 18. Further, the cap is formed such that a cap (not shown) can be attached (fitted) to the front shaft 20 so as to cover the application body 18 and the front shaft 20 after use.

  In FIG. 1, reference numeral 22a denotes a stirring ball for stirring the liquid in the storage section 22 by manual reciprocation.

[Installation conditions for each component of cosmetic container]
FIG. 2 shows the configuration of the dimensions of each part. In FIG. 2, the axis L is indicated by a dashed line.

In the cosmetic container, the position of the tip of the pipe 16 in the front shaft is represented by the following formula (I).
1.5 <Vcos θ × (D / A) <10 (I)
Where A is the area of the tip opening of the tip shaft (mm ² )
D: Area of pipe inner diameter (mm ² )
V: Volume from the tip of the pipe to the tip of the tip shaft (mm ³ )
θ: Average angle (°) between the line connecting the pipe tip and the inside of the tip shaft and the axis
This is a cosmetic container in which the tip of the pipe 16 is retracted from the tip of the front shaft so as to satisfy the following.

The average angle θ is preferably in the range of 5 ° <θ <20 °,
The volume V is preferably in the range of 10 <V <30 (mm ³ ).
The area ratio D / A is preferably in the range of 0.1 <D / A <0.2.

In the cosmetic container of the embodiment, an acrylic acid polymer having a glass transition point of 20 ° C. or lower obtained by polymerizing monomers selected from an acrylic acid monomer, a methacrylic acid monomer, an acrylate monomer, and a methacrylate ester monomer. It contains an aqueous emulsion, has a surface tension of 30 to 45 mN / m, a temperature of 25 ° C. by a cone-plate viscometer, a viscosity (N ₁ ) at a shear rate of 3.83 s ⁻¹ , of 50 to 700 mPa · s, and a shear rate of 383 s. viscosity at ^-1 _{(N 2)} is suitably a 5~70mPa · s. More preferably it is more desirable that the ratio of its viscosity (N 1 _{/ N 2)} is containing a liquid cosmetic composition is 10 to 20.

  Here, for the sake of comparison, a cosmetic container in which the tip of a pipe is located at the same or forward position as the tip of the front shaft in a conventional cosmetic container will be considered. In this cosmetic container, the low-viscosity liquid cosmetic solidifies with time in the tip of the application body and the inside of the pipe. If the feeding is continued in this state, the internal pressure increases. Then, when the solidified portion is broken by the feeding operation, the liquid scatters due to the accumulated pressure.

  On the other hand, in the cosmetic container of the present embodiment, the pipe 16 is retracted toward the operation unit 12 in the application body 18. Thereby, the tip of the pipe 16 is hidden in the front shaft 20. Therefore, the drying and solidification in the pipe 16 is slowed down, and the liquid cosmetic is hardly dried.

  Further, as shown in FIG. 1, the clearance around the front shaft 20 and the application body 18 increases due to the retreat of the pipe 16. By this clearance, a flow path is secured in the applied body 18 when the cosmetic is solidified. Thus, the liquid cosmetic can be discharged from the front shaft opening 20a using the clearance as a flow path in the application body 18 in the front shaft 20.

  Since the pipe 16 is sunk into the front shaft 20 rather than the boundary surface (preferably 3 to 4 mm), a drying delay effect occurs. A diameter of 1.0 mm or more is preferable because it affects the inner diameter of the pipe 16.

  The clearance between the front shaft 20 and the periphery of the application body 18 increases, and a flow path at the time of solidification of the application body 18 can be secured. In addition, since the application body 18 has a fiber neck (for example, a fiber diameter of 0.05 to 0.2 mm) and the pipe 16 is retracted, the fibers of the application body 18 are gathered at the center in the front shaft 20, and the periphery of the application body 18 And the clearance between the tip shaft 20 and the inner surface thereof increases. A channel for liquid makeup can be secured.

  Next, the evaluation results of the cosmetic container of the above-described embodiment are shown in the table of FIG.

In this case, the fiber diameters of the liquid cosmetic composition part and the applied body used were as follows. In this case, the numerical values represent mass%.
Carbon black: 8%
Alkyl acrylate copolymer emulsion: 20%
Microcrystalline cellulose: 2%
Polyethylene glycol alkyl ether: 2%
Diethylhexyl sulfosuccinate Na solution: 0.1%
Ethylhexyl glycerin: 0.2%
Disodium edetate: 0.3%
Aminomethylpropanol: 0.1%
Purified water: residual shear rate 3.83 (s ^-1 ) Viscosity: 120 mPa · s
Shear speed 383 (s ^-1 ) viscosity: 10 mPa · s
Surface tension: 35 mN / m
Fiber diameter of brush ear (coated body): 0.10mm

(Evaluation method)
What contained the above-mentioned liquid cosmetics in the cosmetic containers of each structure of the following comparative examples 1-6 and Examples 1-6 was prepared. In each of the cosmetic containers having the structures of Comparative Examples 1 to 7 and Examples 1 to 3, after being used for application to the target surface, the container was left in an environment without a cap at 25 ° C. and 60% for 24 hours. Discharge amount: 4 [μl / s] (microliter / second) for 10 seconds. The evaluation number of each cosmetic container is 10.
They were subjected to a sensory evaluation according to the following evaluation criteria.

Evaluation criteria:
A: It was supplied sequentially, and normal application could be performed without blowing any one.
B: No blowing was performed, but the liquid did not reach and application was not possible.
C: Blown out.

  The evaluation results were as shown in the table of FIG. In addition, the application bodies 18 of Examples 9 and 10 and Comparative Examples 5 and 6 correspond to the dimensional ratio of the opening diameter of the front end of the front shaft of Examples 1 to 8 and Comparative Examples 1 to 4. Only the size and the number of fibers are different.

  According to the experimental results shown in FIG. 3, the evaluation of each of Examples 1 to 10 satisfying 1.5 <Vcos θ × (D / A) <10 is “A”, The liquid cosmetic compositions were sequentially supplied by feeding out, and normal application could be performed without blowing out any one.

  On the other hand, in Comparative Examples 1 to 4, the evaluation result was "Blowed out" of "C". In Comparative Examples 5 and 6, the evaluation result was "B", "the liquid did not reach and application was not possible".

  From the above, it can be understood that the present example is useful because there was no ejection and good coating was obtained as compared with the comparative example.

  As described above, the present embodiment is merely an example of the present invention, and it is apparent that the embodiment can be modified within the scope of the present invention.

  The cosmetic container of the present invention can be used for a product containing a liquid cosmetic.

Reference Signs List 10 Container main body 12 Operation part 14 Feeding mechanism 16 Pipe 18 Application body 20 Shaft

Claims (2)

Liquid is stored in the container body, the liquid in the container body by the feeding mechanism when the operation unit is operated, in a cosmetic container from which the applied body is fed through a pipe,
The tip of the coating body protrudes from the tip opening of the front shaft that covers the coating body, a pipe is disposed behind the front opening of the tip shaft, and the tip position of the pipe is expressed by the following formula (I).
1.5 <Vcos θ × (D / A) <10 (I)
Where A is the area of the tip opening of the tip shaft (mm ² )
D: Area of pipe inner diameter (mm ² )
V: Volume from the tip of the pipe to the tip of the tip shaft (mm ³ )
θ: Average angle (°) between the line connecting the tip of the pipe and the inside of the tip of the shaft and the axis
A cosmetic container characterized by satisfying. Including an aqueous emulsion of an acrylic acid polymer having a glass transition point of 20 ° C. or lower obtained by polymerizing monomers selected from acrylic acid monomers, methacrylic acid monomers, acrylic acid ester monomers, and methacrylic acid ester monomers, and having a surface tension of 30 ４５45 mN / m, viscosity at a temperature of 25 ° C. measured by a cone-plate viscometer, shear rate of 3.83 s ⁻¹ is 50 to 700 mPa · s, and viscosity at a shear rate of 383 s ⁻¹ is 5 to 70 mPa · s. The cosmetic container according to claim 1, wherein the cosmetic container contains a liquid cosmetic composition.

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