JP5116446B2 - Cosmetic container - Google Patents

Description

  The present invention relates to a cosmetic container, and more particularly, to a cosmetic container in which a cosmetic body containing a volatile component is contained in a container body having an annular side portion standing up from a bottom portion and having an upper surface opened.

  For example, oily solid types such as foundations, makeup cosmetics, and skin care cosmetics, solid emulsion type cosmetics, and solid powder type cosmetics are relatively shallow dish-like containers such as compact containers and bottomed cylindrical shapes. In many cases, the container is used by being filled in a container. The cosmetics filled and accommodated in these cosmetic containers are solid, semi-solid, etc. and have shape retention, so when they contain volatile components, for example, when they are solidified after being filled in a fluid state It is exposed to high temperatures and dry environments during transportation and storage, or after being filled and repeatedly used while opening and closing the lid, it shrinks due to volatilization of volatile components, leaving a gap between the container and the inner peripheral surface. Or the adhesion to the inner peripheral surface of the container is reduced, and the container tends to come off and rotate.

For this reason, even if the filled cosmetic is contracted, it maintains its adhesion to the inner peripheral surface of the container, and the cosmetic rotates inside the container or peels off from the inner peripheral surface of the container. Various types of cosmetic containers have been developed that can avoid the occurrence of such damage (see, for example, Patent Document 1 and Patent Document 2). In these cosmetic containers, a rough surface or irregularities are provided on the inner peripheral surface of the container to enhance the adhesion with the cosmetic.
Japanese Patent No. 3445839 JP-A-8-58701

  However, when the cosmetic filled and contained in the container contains, for example, 5 to 60% by weight of a volatile component and the amount of shrinkage is large, the adhesiveness with the cosmetic, the function of preventing the cosmetic from rotating, etc. In order to improve the above, it is necessary to form the rough surface and the height of the unevenness formed on the inner peripheral surface of the container higher.

  On the other hand, in recent years, the container body is generally manufactured as a molded product made of a synthetic resin using a mold so that the container body filled with cosmetics can be efficiently mass-produced. When molding using a mold, it is necessary to remove the core of the mold. Therefore, special contrivance is required in order to form high unevenness on the inner peripheral surface of the container body.

  The present invention can easily mold a container main body from a synthetic resin using a mold, and fills a cosmetic material with a large shrinkage amount by providing unevenness on the inner peripheral surface of the container main body. An object of the present invention is to provide a cosmetic container capable of effectively avoiding the slipping out and rotation of the cosmetic inside the container body even when the container is housed.

  The present invention is a cosmetic container in which a cosmetic body containing 5 to 60% by weight of a volatile component is contained in a container body having an annular side portion standing up from the bottom and having an upper surface opened. A molded product made of synthetic resin using a mold, on the inner side surface of the annular side portion, a spiral rib continuous in a spiral direction is formed, and on the inner side surface of the bottom portion, the core of the mold is The object described above is achieved by providing a cosmetic container in which an uneven portion extending in the circumferential direction is formed in a shape that does not inhibit the rotation of the core when pulled in the spiral direction.

  According to the cosmetic container of the present invention, the container main body can be easily formed from a synthetic resin using a mold, and the inner peripheral surface of the container main body is provided with unevenness of a considerable height, so that the shrinkage amount Even when a large amount of cosmetic is filled and accommodated, it is possible to effectively prevent the cosmetic from being detached or rotated inside the container body.

  A cosmetic container 10 according to a preferred embodiment of the present invention shown in FIG. 1 to FIG. 3 is a container body 11 made of synthetic resin filled with, for example, an oily solid type foundation as a cosmetic 13 (see FIG. 2). It will be. The user opens and closes the upper surface opening 11 a of the container body 11 by attaching and detaching the lid 12 screwed to the upper outer peripheral surface of the container body 11, for example, rotating his / her finger so as to stroke along the surface of the cosmetic 13. The cosmetic is scooped out while being applied and applied to the skin surface or the like. In the present embodiment, the cosmetic 13 contains a large amount of volatile components. For example, when the container 13 is solidified after being filled in the container main body 11 or during repeated use while opening and closing the lid 12, the volatile components are volatilized. Will contract. According to the cosmetic container 10 of this embodiment, even if the cosmetic 13 contracts, the adhesiveness between the inner peripheral surface of the container main body 11 and the filled cosmetic 13 is maintained, and the interior of the container main body 11 is maintained. Thus, it is possible to effectively prevent the cosmetic material 13 from coming off or rotating.

  And the cosmetic container 10 of this embodiment is provided with a cosmetic 13 containing 5 to 60% by weight of a volatile component in a container body 11 having an annular side portion 15 rising from a bottom portion 14 and having an upper surface as an upper surface opening 11a. The container main body 11 is a molded product made of a synthetic resin using a mold, and the inner side surface 15a of the annular side portion 15 has a spiral shape that is continuous in the spiral direction X. The rib 16 is formed, and the inner surface 14a of the bottom portion 14 is formed with an uneven portion 17 that extends in the circumferential direction in a shape that does not hinder the rotation of the core when the core of the mold is pulled in the spiral direction X. .

  Here, the concavo-convex portion 17 includes a case where only one of the concave portion or the convex portion is provided. In the present embodiment, only the plurality of convex portions by the ring-shaped ribs 18 are provided, and the concave and convex portions 17 are formed.

  In the present embodiment, the plurality of uneven portions 17 extending in the circumferential direction formed on the inner surface 14 a of the bottom portion 14 are a plurality of ring-shaped ribs arranged concentrically with the center of the bottom portion 14 as the center. 18.

  In the present embodiment, the container body 11 is formed as an injection molded product made of a synthetic resin using a mold. Here, as a synthetic resin for forming the container body 11, for example, polyethylene terephthalate, polypropylene, ABS (acrylonitrile butadiene styrene), polycyclohexylene dimethylene terephthalate (PCT), or poly-1,4-cyclohexylene dimethylene. A terephthalate / isophthalic acid copolymer (PCTA) or the like can be preferably used. The container body 11 has a hollow cylindrical annular side portion 15 extending from the peripheral portion of the disk-shaped bottom portion 14 having a diameter of, for example, about 30 to 70 mm, and the overall height of the container body 11 is, for example, about 10 to 30 mm. It has a compact bottomed cylindrical shape that stands as a unit.

  The bottom 14 is formed with a thickness of about 1 to 10 mm, for example. The bottom surface 14b constituting the outer surface of the bottom portion 14 has a concave portion inward from the peripheral edge portion, and a peripheral edge portion projecting downward from the inwardly recessed portion carries the container body 11. An annular leg portion 19 is formed for placement. In the present embodiment, four ring-shaped ribs 18 are concentrically centered on the center of the bottom portion 14 on the upper surface of the inner surface 14 a of the bottom portion 14 and surrounded by the annular side portion 15. It is arranged and provided.

  In the present embodiment, each ring-shaped rib 18 has a lower side with a protruding height from the inner side surface 14a of the bottom portion 14 of, for example, about 0.5 to 3 mm and a width of the upper side of, for example, about 0.5 to 5 mm. It has a substantially isosceles trapezoidal cross-sectional shape with a slightly wider width. Each ring-shaped rib 18 is provided concentrically with a center-to-center pitch of, for example, about 1 to 10 mm in the radial direction with an interval of about 0.5 to 5 mm between adjacent ring-shaped ribs 18. The cross-sectional shape of the ring-shaped rib 18 does not necessarily need to be a substantially isosceles trapezoid as long as the shape does not hinder the rotation of the core when the mold core is pulled out in the spiral direction X as described later. It may be a substantially rectangular shape, a substantially isosceles triangle, a substantially semicircle, or the like. In addition, the height of the ring-shaped rib 18 is preferably as high as possible from the viewpoint of maintaining the adhesiveness with the inner side surface 14a of the bottom 14 of the container body 11 even when the cosmetic 13 contracts. When the height is increased, the capacity of the cosmetics 13 to be accommodated is reduced, and it becomes difficult to scoop up the cosmetics 13 sandwiched between the interval portions of the adjacent ring-shaped ribs 18.

  The annular side portion 15 of the container body 11 includes a thick base end portion 20 on the lower side close to the peripheral portion of the bottom portion 14 and a thin threaded portion 21 on the upper side of the thick base end portion 20. The inner side surface 15a of the annular side portion 15 straddling the thick-walled base end portion 20 and the thin-walled screw portion 21 is smooth in the vertical direction except for the portions of the spiral ribs 16 formed by the core removal of the mold described later. It is a continuous surface. The outer side surface 15b of the annular side portion 15 straddling the thick base end portion 20 and the thin screw portion 21 is a surface provided with a step portion 22 and a male screw ridge 23 formed by a split mold.

  In the present embodiment, the spiral rib 16 formed to project inward from the inner side surface 15a of the annular side portion 15 extends spirally upward from the inner side surface 15a of the joint portion with the bottom portion 14, It is formed only in the lower part of the annular side part 15 without exceeding the thick base end part 20. In the present embodiment, the spiral rib 16 has a protruding height from the inner side surface 15a of the annular side portion 15 of, for example, about 0.5 to 5 mm, an upper side of, for example, about 0.3 to 3 mm, and a lower side of, for example, a width of It has a substantially isosceles trapezoidal cross-sectional shape with a size of about 0.5 to 5 mm. In the present embodiment, the spiral rib 16 is inclined at an angle θ in which the spiral direction X of the screw advances in the height direction of 0.8 to 8 mm per rotation with respect to the horizontal direction, for example. The core is formed to rotate in the counterclockwise direction to be pulled out.

  Accordingly, in the present embodiment, the spiral ribs 16 are arranged in a two- to three-fold manner in the vertical direction, and an interval of about 0.3 to 3 mm is provided between the spiral ribs 16 adjacent in the vertical direction. For example, the center pitch is about 0.8 to 8 mm. For example, when the user scoops up the cosmetic 13 with a finger, the user generally rotates the finger clockwise, but the spiral direction X rotates the mold core counterclockwise and pulls it out. Since the spiral rib 16 is formed so as to be in the direction, the action of rotating the finger clockwise along the surface of the cosmetic 13 causes the force in the direction to bite the cosmetic 13 into the spiral rib 16. Therefore, it becomes possible to more effectively prevent the cosmetic 13 from rotating inside the container body 11 during use.

  Furthermore, since the spiral rib 16 is provided only at the lower portion of the inner side surface 15a of the annular side portion 15, it is possible to avoid as much as possible that the cosmetic 13 is difficult to scoop due to the unevenness of the spiral rib 16. . Furthermore, since the spiral rib 16 is provided in the lower part of the annular side portion 15 without exceeding the thick base end portion 20, for example, when the container body 11 is formed using a transparent resin, the thick base The spiral rib 16 formed on the end portion 20 and the male threaded ridge 23 formed on the thin-walled screwed portion 21 do not appear to overlap from the outside, and this is advantageous in that the appearance of the container body 11 is impaired. Can be avoided.

  Note that the cross-sectional shape of the spiral rib 16 is not necessarily a substantially isosceles trapezoid as long as the mold core can be smoothly pulled out as will be described later. It may be a substantially semicircle or the like. In addition, the height of the spiral rib 16 is preferably as high as possible from the viewpoint of maintaining adhesion with the inner side surface 15a of the annular side portion 15 of the container body 11 even when the cosmetic 13 contracts. If the height is excessively high, the capacity of the cosmetic 13 to be accommodated is reduced, and it becomes difficult to scoop up the cosmetic 13 sandwiched between the gaps between the spiral ribs 16 adjacent to each other in the vertical direction. It will be.

  In the present embodiment, the outer surface 15 a of the annular side portion 15 of the container body 11 is provided with a male screw protrusion 23 that protrudes outward from the thin screwed portion 21. The male threaded ridge 23 is a general one having a substantially isosceles trapezoidal cross-sectional shape, for example. Through the male screw ridge 23, the lid body 12 having the female screw ridge 25 on the inner surface of the skirt portion 24 can be attached to and detached from the thin screwed portion 21 so as to cover the upper surface opening 11 a of the container body 11. Will be screwed on.

  In this embodiment, the lid body 12 screwed to the container body 11 has a double structure including an inner lid 26 and an outer lid 27 fitted on the outer side of the inner lid 26. In addition, it has a low-headed cylindrical shape composed of the top surface portion 28 and the skirt portion 24. On the inner side surface of the skirt portion 24 by the inner lid 26, a female screw ridge 25 that is screwed with the male screw ridge 23 of the container body 11 is provided. A packing 29 is attached to the inner surface of the top surface portion 28 by the inner lid 26. When the packing 29 is sandwiched between the inner side surface of the inner lid 26 and the upper end surface of the thin threaded portion 21 of the container body 11, a strong seal is obtained when the upper surface opening 11 a of the container body 11 is closed by the lid body 12. It is possible to ensure sex.

  In the cosmetic container 10 of the present embodiment having the above-described configuration, the spiral ribs 16 and the ring-shaped ribs having a considerable height are formed on the inner side surface 15a of the annular side portion 15 and the inner side surface 14a of the bottom portion 14 of the container body 11. However, according to the present embodiment, the container body 11 having the spiral ribs 16 and the ring-shaped ribs 18 can be easily formed by injection molding using a mold. That is, according to the present embodiment, the spiral rib 16 that is continuous in the spiral direction X is formed on the inner side surface 15 a of the annular side portion 15 of the container main body 11, and the inner side surface 14 a of the bottom portion 14 of the container main body 11 is A plurality of ring-shaped ribs 18 extending in the circumferential direction are formed in a shape that does not hinder the rotation of the core when the core of the mold is pulled in the spiral direction X. Therefore, if the core provided with the spiral recesses of the shape corresponding to the spiral ribs 16 is rotated along the spiral direction X of the spiral ribs 16, the spiral ribs 16 and It is possible to smoothly extract the mold core from the inside of the molded container body 11 without being obstructed by the ring-shaped rib 18 and without performing special processing or improvement on the core. Further, the outer side of the container body 11 can be easily formed using a split mold in accordance with a conventional method.

In the present embodiment, the container body 11 formed as described above is filled with a cosmetic containing 5 to 60% by weight of a volatile component. Here, the volatile component includes a water-soluble volatile component and a volatile oil agent component, and refers to a component having a boiling point of 250 ° C. or less at normal pressure (1 atm).
After filling the container body 11 with cosmetics containing 5 to 60% by weight of volatile components, the lid body 12 is removed and the upper surface opening 11a of the container body 11 is opened, under conditions of a temperature of 40 ° C. and a humidity of 50%. When left for 24 hours, for example, a weight loss due to evaporation of about 0.2 to 2.0% occurs, and the container body 11 contracts.

  The container main body 11 of the present embodiment can effectively prevent the cosmetic material from being pulled out and rotated by being filled and accommodated. Therefore, the cosmetics filled and accommodated in the container body 11 from the viewpoint of coexistence of the ingredients taking into consideration the spread of the cosmetics, the feeling of use, and the persistence on the skin, and the prevention of the cosmetics from coming out of the container body 11 Preferably contains 10 to 60% by weight of volatile components, more preferably 30 to 60% by weight of volatile components.

  Cosmetics containing 5 to 60% by weight of such volatile components include, for example, foundations, makeup cosmetics, and oil-based solid types, solid emulsion type cosmetics, solid powder types including part of skin care cosmetics. Examples include cosmetics.

Examples of volatile components include volatile oil components such as volatile silicone oil and volatile hydrocarbon oil, and volatile water-soluble components such as water and lower alcohol.
Specific examples of the volatile silicone oil include dimethylsiloxane, which is a low molecular weight linear organic silicone, and octamethylcyclocyclotetrasiloxane and decamethylpentacyclosiloxane, which are cyclic silicones.
Examples of the volatile hydrocarbon oil include some hydrogenated isobutene and liquid isoparaffin.

  Further, the cosmetic material filled and accommodated in the container main body 11 contains an oil component, which makes the cosmetic material slip easily with respect to the inner surface of the container main body 11. The oil component is composed of the volatile oil component and the non-volatile oil component described above, and is preferably included in the cosmetic material filled and accommodated in the container body 11 in an amount of 10 to 80% by weight. Examples of the non-volatile oil component include non-volatile oil. Non-volatile oils specifically include cocoa butter, castor oil, jojoba oil, olive oil, mink oil, avocado oil, sunflower oil, macadamia nut oil and other fatty acids; isononanoic acid, isostearic acid and other higher fatty acids; isopropyl myristate , Fatty acid esters such as isopropyl isostearate, neopentyl glycol dicaprate, diisostearyl malate; liquid paraffin, liquid isoparaffin, cycloparaffin, α-olefin oligomer, hydrocarbon oil such as squalene, squalane, silicone oil, fluorine oil Etc.

  It should be noted that the cosmetic material filled and accommodated in the container body 11 contains 10 to 80% by weight in total of the volatile component and the non-volatile oil component as described above. It is preferable for adjusting the persistence of the resin.

  Then, according to the cosmetic container 10 of the present embodiment, the cosmetic 13 and the container main body 11 are filled even when the cosmetic 13 having such a large shrinkage amount is filled in the container main body 11 and the cosmetic 13 contracts. It is possible to effectively prevent the cosmetic 13 from coming off or rotating inside the container body 11 while maintaining the close contact state with the inner peripheral surface of the container body 11. That is, according to the present embodiment, the inner surface 14 a of the bottom portion 14 of the container body 11 and the inner surface 15 a of the annular side portion 15 have high height unevenness due to the plurality of ring-shaped ribs 18 and the spiral ribs 16. Even when the amount of shrinkage of the cosmetic 13 is large, the high unevenness bites into the peripheral surface of the cosmetic 13 so that sufficient adhesion with the cosmetic 13 is maintained. Thus, it is possible to effectively avoid the cosmetic material from being detached or rotated inside the container body 11.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the plurality of uneven portions formed in the inner surface of the bottom portion and extending in the circumferential direction in a shape that does not hinder the rotation of the core when the core of the mold is pulled out in the spiral direction is centered on the center of the bottom portion. The plurality of ring-shaped ribs arranged concentrically are not necessarily required. For example, as shown in FIGS. 4 (a) and 4 (b), it has an arcuate planar shape along one circumference centered on the center of the bottom 14 of the container body 11, and the top surface is spiral. In a state where a plurality of arc-shaped ribs 30 projecting in a slope shape from the inner side surface 14a of the bottom portion 14, which are inclined surfaces having the same inclination angle as the inclination angle of the rib 16 with respect to the horizontal direction of the spiral direction X, are divided in the circumferential direction. It is also possible to provide a plurality of uneven portions 17. Further, as shown in FIG. 5, such arc-shaped ribs 30 can be provided in a distributed manner along a plurality of circumferences having different diameters passing through the center of the bottom portion 14. Furthermore, it is preferable that the plurality of concave and convex portions be formed by providing a convex portion on the inner side surface of the bottom of the container body, but the concave and convex portions are provided as concave portions such as concave grooves having a shape that does not hinder the rotation of the core. It can also be formed. Furthermore, it is not always necessary to form the spiral rib so that the spiral direction is the direction in which the core is rotated counterclockwise, and the spiral rib is formed in the direction in which the core is rotated clockwise. You can also.

It is a disassembled perspective view of the state before accommodating cosmetics of the cosmetic container which concerns on preferable one Embodiment of this invention. It is a principal part exploded sectional view in the state where cosmetics were stored of a cosmetics container concerning one desirable embodiment of the present invention. (A) is sectional drawing of a container main body, (b) is a top view of a container main body, (c) is a side view of a container main body. (A) is a schematic top view illustrating another form of a plurality of concavo-convex portions extending in the circumferential direction provided on the inner surface of the bottom of the container body, and (b) is an A- It is an expanded sectional view along A. It is a schematic top view which illustrates further another form of the several uneven | corrugated | grooved part extended in the circumferential direction provided in the inner surface of the bottom part of a container main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cosmetic container 11 Container main body 11a Upper surface opening 12 of container main body Cover body 13 Cosmetics 14 Bottom part 14a of container main body 15 Inner side surface 15 of container main body Annular side part 15a Inner side surface 16 of annular side part Spiral rib 17 Circumference Irregularities extending in the direction 18 Ring-shaped ribs (irregularities)
20 Thick base end portion 21 of the annular side portion Thin threaded portion 23 of the annular side portion Male threaded ridge 25 Female threaded ridge X Spiral direction θ Inclination angle of the spiral direction of the spiral rib with respect to the horizontal direction

Claims (5)

A cosmetic container containing a cosmetic containing 5 to 60% by weight of a volatile component in a container body having an annular side portion standing up from the bottom and having an upper surface opened,
The container body is a molded article made of a synthetic resin using a mold, and on the inner side surface of the annular side portion, a spiral rib continuous in a spiral direction is formed, and on the inner side surface of the bottom portion, A cosmetic container in which a plurality of concavo-convex portions extending in the circumferential direction are formed in a shape that does not hinder the rotation of the core when the core of the mold is pulled out in the spiral direction.   The cosmetic container according to claim 1, wherein the cosmetic contains 10 to 80% by weight of an oil component comprising a volatile oil component and / or a non-volatile oil component.   The plurality of uneven portions extending in the circumferential direction formed on the inner side surface of the bottom portion are a plurality of ring-shaped ribs arranged concentrically around the center of the bottom portion. Cosmetic container.   The cosmetic container according to claim 1, wherein the spiral rib is provided at a lower portion of the annular side portion.   The cosmetic container according to any one of claims 1 to 3, wherein the spiral rib is formed such that the spiral direction is a direction in which the core is rotated counterclockwise and pulled out.

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