WO2014204068A1

WO2014204068A1 - Cap for cosmetic case having active type sealing structure

Info

Publication number: WO2014204068A1
Application number: PCT/KR2013/011737
Authority: WO
Inventors: Jin Woo Kim
Original assignee: Ctk Co., Ltd
Priority date: 2013-06-18
Filing date: 2013-12-17
Publication date: 2014-12-24
Also published as: KR101308231B1

Abstract

Disclosed herein is a cap for a cosmetic case having an active type sealing structure. The cap includes a cap body. A rotary support is formed on a lower surface in the cap body. A sealing member is coupled to move up and down relative to the rotary support, and is not turned along the cap body when the cap body is manipulated to be open or closed, and elastically serves to support an upper surface of the neck portion of the cosmetic case in a sealing manner. A pressurizing rib is formed on the lower surface in the cap body to pressurize an upper portion of the sealing member that is placed on the upper surface of the neck portion of the cosmetic case when the cap is manipulated to be closed.

Description

CAP FOR COSMETIC CASE HAVING ACTIVE TYPE SEALING STRUCTURE

The present invention relates, in general, to a cap for sealing a cosmetic case used to contain and store various kinds of cosmetics including cream-type cosmetics and, more particularly, to a cap for a cosmetic case having an active type sealing structure, which is capable of actively coping with a situation wherein a neck portion to which a cap is coupled in a threaded fastening method is slightly deformed and shrunk while a cosmetic case is naturally cooled in a forming process thereof, in addition to allowing the cap to stably seal the cosmetic case.

Generally, a cosmetic case used to contain and store cream-type cosmetics is mainly made of glass, namely, a glass material by injection molding. However, the cosmetic case made of the glass material by injection molding is often broken when being rapidly cooled because of characteristics of its material. While the cosmetic case of glass material is naturally cooled, a neck portion may be often deformed and shrunk slightly, which extends upwards from a case body containing cosmetics therein to a predetermined height in such a way that a cap is coupled to the neck portion in a sealing manner. Thus, if the neck portion is deformed and shrunk while the cosmetic case undergoes the natural cooling process, a coupling force of the cap with the neck portion is reduced as such, and naturally, there is a limit to provide a stable sealing ability.

That is, referring to FIGS. 1 and 2, a conventional cosmetic case 1 made of a glass material is problematic in that an upper surface 4 of a neck portion 3 extending upwards from a main body 2 is slightly deformed or shrunk while it is naturally cooled, so that its height is not constant and thereby may be inclined to one side (see reference character A) or be partially deformed. In such a state, when a cap 5 is coupled to the neck portion 3, even if a threaded portion 3a formed on an outer circumferential surface of the neck portion 3 engages with a threaded portion 5a that is correspondingly formed on an inner circumferential surface of the cap 5 in a threaded fastening method, a packing 6 integrally attached to the inner circumferential surface of the cap 5 is structurally limited to completely seal the cosmetic case 1 while actively coping with the upper surface 4 of the neck portion 3 having an irregular height. A small gap naturally occurs between the deformed portion and the packing 6 (see an enlarged portion of FIG. 2), or a contact force is inevitably weakened. Further, since the packing 6 is made of an elastic material such as rubber, the packing 6 may undesirably adhere to the upper surface 4 of the neck portion 3 of the cosmetic case 1 when it is used after being stored for a lengthy period of time. Thereby, it is very inconvenient to open or close the cap. In addition, when one desires to open the cap 5, the packing 6 is forcibly rotated along with the cap 5 while being in close contact with the upper surface 4 of the neck portion 3. At this time, the packing 6 is inevitably damaged.

Further, in order to provide a stable airtight sealing force for a neck portion of a conventional cosmetic case, the applicant of this invention proposed Korean Patent No. 1268157, which is entitled 'cap for Cosmetic Case having Sealing Structure'. However, this cosmetic case is likewise problematic in that the packing of an elastic material is integrally provided in the cap by insertion or ultrasonic coupling, so that it is difficult to cope with a difference or irregularity in height of the upper surface of the neck portion of the cosmetic case and to offer an active sealing ability.

Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a cap for cosmetic case having an active type sealing structure, in which a sealing member, having a packing made of a rubber material of a high elastic restoring force and integrally provided on a support plate, is provided in a cap body, and is coupled to the cap body independently of the rotation of the cap body, thus always providing an active airtight sealing force for a neck portion of the cosmetic case and in which, even if the cap closed for a lengthy period of time is manipulated to be opened, the sealing member is not turned along the cap body, thus preventing the distortion or damage to the packing due to the operation of opening the cap, and in which, even if the packing adheres to an upper surface of the neck portion, it is possible to vertically separate the packing when the cap is manipulated to be opened, thus preventing the packing from being damaged and making it possible to stably remove the cap from the cosmetic case.

In order to accomplish the above object, the present invention provides a cap for a cosmetic case having an active type sealing structure, the cap fastened to a neck portion in a threaded fastening method so as to store cosmetics containing cream- or moisture-type contents in the cosmetic case in an actively sealing manner, the cap including a cap body; a rotary support formed on a lower surface in the cap body; a sealing member coupled to move up and down relative to the rotary support, the sealing member not being turned along the cap body when the cap body is manipulated to be opened or closed, and elastically serving to support an upper surface of the neck portion of the cosmetic case in a sealing manner; and a pressurizing rib formed on the lower surface in the cap body to pressurize an upper portion of the sealing member that is placed on the upper surface of the neck portion of the cosmetic case when the cap is manipulated to be closed.

According to the present invention, the sealing member may preferably include a support plate made of a hard material and having a coupling support extending upwards, the coupling support being elastically coupled to the rotary support, and a packing made of an elastic rubber material and integrally provided on a lower surface of the support plate in such a way as to be in close contact with the upper surface of the neck portion of the cosmetic case.

According to the present invention, preferably, the coupling support of the sealing member elastically coupled to the rotary support may not be in contact with the lower surface of the cap body but may be coupled with a moving space sufficient to permit a free vertical movement.

According to the present invention, preferably, the packing of the sealing member may further include a contact groove, the contact groove being coupled to a protruding rim that protrudes from the upper surface of the neck portion of the cosmetic case in a sealing manner in such a way as to surround the protruding rim.

According to the present invention, preferably, the pressurizing rib formed on the lower surface of the cap body may be disposed to pressurize an upper surface of the sealing member that is located on a vertical axis with respect to the upper surface of the neck portion when the cap is manipulated to be closed.

The cap according to the present invention is advantageous in that the sealing member provided in the cap body is separately coupled not to be turned along the cap body and to be movable up and down when the cap is manipulated to be opened or closed, thus performing an active sealing function even if the upper surface of the neck portion is irregular in height or is partially deformed during the process of forming the cosmetic case, and the sealing member is not turned along the cap body even if the cap closed for a lengthy period of time is manipulated to be opened, thus preventing the distortion or deformation of the packing due to the operation of opening the cap, and the packing is naturally separated vertically by the opening of the cap even if the packing adheres to the upper surface of the neck portion, thus preventing the packing from being damaged and allowing the cap to be stably separated from the cosmetic case.

Further, the cap the present invention is advantageous in that the pressurizing rib provided on the lower surface of the cap body enables the sealing member to always be pressed and supported uniformly, and the pressurizing rib is formed at a position capable of directly pressurizing the upper surface of the neck portion of the cosmetic case, so that a stable sealing ability is always maintained even if the height of the upper surface of the neck portion is varied.

Furthermore, the cap the present invention is advantageous in that the protruding rim formed on the upper surface of the neck portion of the cosmetic case is surrounded and supported by the contact groove provided in the packing of the sealing member, thus reducing the number of portions to be sealed and ensuring a firmer sealing operation.

FIG. 1 is a side sectional view showing a forming structure of a conventional cosmetic case;

FIG. 2 is a side sectional view showing a cap sealing structure of the conventional cosmetic case in a coupled state;

FIG. 3 is an exploded side sectional view of the present invention;

FIG. 4 is an exploded side sectional view showing a cap according to the present invention;

FIG. 5 is a bottom view of the cap according to the present invention; and

FIG. 6 is a side sectional view of the present invention in an assembled state.

Hereinafter, the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

A cap 100 for a cosmetic case having an active type sealing structure according to the present invention is fastened to a neck portion 12 in a threaded fastening method so as to store cosmetics containing cream- or moisture-type contents in the cosmetic case 10 in a sealing manner. The cap 100 for the cosmetic case having the active type sealing structure according to the present invention will be described below with reference to FIGS. 3 to 6.

The cap 100 for the cosmetic case having the active type sealing structure according to the present invention includes a cap body 110. A rotary support 120 is formed on a lower surface in the cap body 110. A sealing member 130 is coupled to move up and down relative to the rotary support 120, is not turned along the cap body 110 when it is manipulated to be open or closed, and serves to elastically support an upper surface 14 of the neck portion 12 of the cosmetic case 10 in a sealing manner. A pressurizing rib 140 is formed on the lower surface in the cap body 110 to pressurize an upper portion of the sealing member 130 that is placed on the upper surface 14 of the neck portion 12 of the cosmetic case 10 when the cap is manipulated to be closed.

Here, the cosmetic case 10 is generally made of glass, namely, is manufactured by injection molding using a glass material. The cap body 110 is preferably formed of ABS resin that is superior in tensile strength, heat resistance, and chemical resistance.

According to the present invention, the sealing member 130 preferably includes a support plate 132 and a packing 134. The support plate 132 is made of a hard material, with a coupling support 133 extending upwards to be elastically coupled to the rotary support 120. The packing 134 is made of an elastic rubber material, and is integrally provided on a lower surface of the support plate 132 in such a way as to be in close contact with the upper surface 14 of the neck portion 12 of the cosmetic case 10.

The packing 134 provided on the support plate 132 of the sealing member 130 is integrally provided on the lower surface of the support plate 132 not so as to be removed therefrom by various methods, for example, insert injection molding, double injection molding or ultrasonic bonding.

Here, the support plate 132 serves to safely cover and support the packing 134 provided on the lower surface thereof. Preferably, the support plate 132 is made of a plastic material that is superior in durability and chemical resistance. That is, it is most preferable to use polypropylene. Further, the packing 134 serves to provide a stable sealing ability for the upper surface 14 of the neck portion 12 of the cosmetic case 10. In terms of the function of the packing 134, it is most preferably made of a rubber material that is good in elastic restoring force and is soft. As an example thereof, it is preferable to use any one of Acrylonitril Butadiene Rubber (NBR), elastomer, and silicon rubber.

As well known to those skilled in the art, a rubber material utilized as a material of the packing 134 of the present invention has the following physical properties: it is superior in oil resistance, wear resistance, and chemical resistance, is low in gas permeability, and is very superior in stress, tensile strength, hardness, etc. Hence, when this is applied to the cap of various cosmetic cases for packing various cosmetics containing cream- or moisture-type contents, it is possible to afford very superior sealing ability.

According to the present invention, a structure of assembling the rotary support 120 with the coupling support 133 is not limited to a specific assembling structure, but any structure is possible as long as the rotary support 120 may be elastically coupled with the coupling support 133.

For example, as shown in FIGS. 4 and 5,

locking steps

120a and 133a are formed, respectively, on the rotary support 120 and the coupling support 133. Further, the rotary support 120 may be divided into portions that are spaced apart from each other at regular intervals, and the coupling support 133 may also be divided vertically, so that they may be elastically coupled to each other. In addition to such a coupling structure, any structure may be utilized as long as it has the same function.

Preferably, as shown in FIG. 3, the coupling support 133 of the sealing member 130 is elastically coupled to the rotary support 120 with a moving space h of about 0.5㎜, so that the coupling support 133 is not into contact with the lower surface of the cap body 110 but is freely movable up and down before the cap 100 is tightened relative to the neck portion of the cosmetic case 10. The reason is as follows: when the height of the upper surface 14 of the neck portion 12 of the cosmetic case 10 is not constant but is varied to be higher or lower in the forming process, the sealing member 130 is finely adjusted to be freely moved up and down in the cap body 110 and thereby copes with a change in height, thus sealing the cosmetic case.

On one hand, the pressurizing rib 140 is formed on the lower surface of the cap body 110 to pressurize the sealing member 130. The pressurizing rib 140 has only to pressurize an edge of the sealing member 130 when the cap 100 is manipulated to be closed. However, as shown in FIG. 6, the pressurizing rib 140 is preferably disposed on the same vertical axis P as the upper surface 14 of the neck portion 12 of the cosmetic case 10 to pressurize an upper portion of the sealing member 130 which is placed on the same vertical axis as the upper surface 14 of the neck portion 12 when the cap is manipulated to be closed, thus affording a stronger and stable sealing ability.

According to the present invention, the packing 134 of the sealing member 130 further includes a contact groove 134a. The contact groove 134a is coupled to a protruding rim 14a that protrudes from the upper surface 14 of the neck portion 12 of the cosmetic case 10 in a sealing manner in such a way as to surround the protruding rim 14a.

As such, the contact groove 134a is further formed on the lower surface of the packing 134, so that a sealing range for the upper surface 14 of the neck portion 12 of the cosmetic case 10 is further reduced. Consequently, firmer sealing is realized when the cap 100 is closed.

Referring to FIGS. 3 to 6, reference numeral 110a denotes a threaded portion that is formed on the inner circumferential surface of a sidewall of the cap body 110, while reference numeral 13a denotes a corresponding threaded portion that is formed on the outer circumferential surface of the neck portion of the cosmetic case to engage with the threaded portion of the cap body 110.

An operation of sealing the cosmetic case 10 that stores various cosmetics containing moisture, including cream-type cosmetics, using the cap 100 for the cosmetic case having the active type sealing structure according to the present invention configured as described above will be described below.

Before the cap 100 is coupled to the cosmetic case 10, the coupling support 133 of the sealing member 130 is elastically coupled to the rotary support 120 of the cap body 110 not to be removed therefrom. Here, the coupling support 133 is assembled with a predetermined moving space h with respect to the lower surface of the cap body 110. Further, the support plate 132 of the sealing member 130 is located in such a way that its upper surface is supported by the pressurizing rib 140 formed on the cap body 110.

In such a state, the cap body 110 is fastened to the neck portion 12 of the cosmetic case 10 in a threaded fastening method. Then, while the cap body 110 is fastened in the threaded fastening method, the packing 134 of the sealing member 130 gradually comes into close contact with the upper surface 14 of the neck portion 12 of the cosmetic case 10 by a tightening force. As the cap body 110 is continuously rotated to be completely fastened to the neck portion 12, the upper surface 14 of the neck portion 12 is blocked and sealed by the packing 134.

Moreover, since the coupling support 133 is separately coupled to the rotary support 120, the sealing member 130 coming into close contact with the upper surface 14 of the neck portion 12 of the cosmetic case 10 is not turned along the cap body 110 even when the cap body 110 is tightened to be fastened to the neck portion 12, but is in close contact with the upper surface 14 of the neck portion 12. Further, while the sealing member 130 comes into close contact with the upper surface 14 of the neck portion 12, the moving space h between the sealing member 130 and the lower surface of the cap body 110 allows the sealing member 130 to actively cope with a change in height of the upper surface 14 of the neck portion 12, thus naturally coming into close contact therewith.

Further, while the sealing member 130 is finely adjusted depending on the height of the upper surface 14 of the neck portion 12, the sealing member 130 is always pressurized and supported by the pressurizing rib 140 regardless of a change in height, thus more reliably sealing the upper surface 14 of the neck portion 12. That is, even if there is a change in height of the upper surface 14 of the neck portion 12, a uniform sealing ability is provided throughout the upper surface 14.

Furthermore, when the cap 100 is closed, the sealing member 130 is always pressurized and supported by the pressurizing rib 140 of the cap body 110. As a result, when the upper surface 14 of the neck portion 12 is manipulated to be sealed, it is subjected to a strong pressurizing force without being bent upwards or deformed.

Meanwhile, when one desires to use the cosmetic, the cap 100 is manipulated to release a threaded fastening force from the neck portion 12 of the cosmetic case 10 and thereby to be opened. Here, when the cap body 110 is manipulated to be opened, the sealing member 130 is not turned along the cap body 110 but remains its original position, and only the cap body 110 is rotated, so that the cap 100 is opened. Therefore, even if the packing 134 made of rubber adheres to the upper surface 14 of the neck portion 12 when the cosmetic case has been stored for a lengthy period of time, only the cap body 110 is rotated and the sealing member 130 is not turned along the cap body 110 when the cap is manipulated to be opened, so that the packing 134 of the sealing member 130 can be safely separated from the upper surface 14 of the neck portion 12 without being distorted or damaged due to friction between the packing 134 and the upper surface 14 of the neck portion 12.

Accordingly, in the case where cosmetics are stored in the cosmetic case 10 in a sealing manner, using the cap 100 for the cosmetic case having the active type sealing structure according to the present invention, the upper surface 14 of the neck portion 12 of the cosmetic case 10 may be varied in height during the forming process as shown in FIG. 1. In this case, when the cap is manipulated to be closed, the sealing member 130 freely moves up and down in the cap body 110 to actively cope with a change in height of the upper surface 14 of the neck portion 12, and evenly comes into close contact with the upper surface 14 of the neck portion 12 to support it, thus affording a stable sealing ability. Meanwhile, when the cap 100 is manipulated to be opened, the sealing member 130 is not rotated but only the cap body 110 is rotated, thus preventing the packing 134 from being distorted or damaged due to friction between the packing 134 and the upper surface 14 of the neck portion 12 and enabling a vertical opening operation from the upper surface 14 of the neck portion 12. As a result, the damage to the packing 134 is prevented and the operation of opening or closing the cap 100 with respect to the cosmetic case 10 can be more conveniently and easily performed.

Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

A cap for a cosmetic case having an active type sealing structure, the cap fastened to a neck portion in a threaded fastening method so as to store cosmetics containing cream- or moisture-type contents in the cosmetic case in an actively sealing manner,

the cap, comprising:

a cap body;

a rotary support formed on a lower surface in the cap body;

a sealing member coupled to move up and down relative to the rotary support, the sealing member not being turned along the cap body when the cap body is manipulated to be opened or closed, and elastically serving to support an upper surface of the neck portion of the cosmetic case in a sealing manner; and

a pressurizing rib formed on the lower surface in the cap body to pressurize an upper portion of the sealing member that is placed on the upper surface of the neck portion of the cosmetic case when the cap is manipulated to be closed.
The cap of claim 1, wherein the sealing member comprises:

a support plate made of a hard material and having a coupling support extending upwards, the coupling support being elastically coupled to the rotary support; and

a packing made of an elastic rubber material, and integrally provided on a lower surface of the support plate in such a way as to be in close contact with the upper surface of the neck portion of the cosmetic case.
The cap of claim 1, wherein the coupling support of the sealing member elastically coupled to the rotary support is not in contact with the lower surface of the cap body but is coupled with a moving space sufficient to permit a free vertical movement.
The cap of claim 1, wherein the packing of the sealing member further comprises a contact groove, the contact groove being coupled to a protruding rim that protrudes from the upper surface of the neck portion of the cosmetic case in a sealing manner in such a way as to surround the protruding rim.
The cap of claim 1, wherein the pressurizing rib formed on the lower surface of the cap body is disposed to pressurize an upper surface of the sealing member that is located on a vertical axis with respect to the upper surface of the neck portion when the cap is manipulated to be closed.