KR101531230B1 - Bottle cap with solid-state beverage additive container - Google Patents

Abstract

The present invention relates to a bottle cap capable of storing a solid-state functional additive, which includes a functional additive added when a person drinks a beverage and is combined to the mouth of a beverage container. The bottle cap comprises: a lower cap which includes annular fitted grooves formed along the top end of the outer circumference and fitted in the top end of the mouth of the beverage container, multiple drinking holes for letting a person drink a beverage along the circular sides at constant intervals, and a cylindrical lower inner cap having an open top and vertically installed in the lower inner portion thereof; and an upper cap which includes a cylindrical upper inner cap vertically installed in the upper inner portion thereof, and has a structure surrounding an upper portion of the lower cap such that the inner circumference thereof is screwed to the outer circumference of the mouth of the beverage container, wherein the upper inner cap has an open bottom having an one-to-one correspondence structure to be forcedly fitted into the top of the lower inner cap. The bottle cap, which is combined to the mouth of the beverage container, includes the one pair of the inner caps which are extended from and face each other inside the cover fixing upper cap and drinking-purpose lower cap, and basically prevents the possibility that the solid-state functional additive, which is prepared in the bottle cap and added when the person drinks the beverage, may be exposed to air and moisture. Moreover, it is possible to reduce the manufacturing costs since the number of components is reduced and the manufacturing process is simplified.

Description

{BOTTLE CAP WITH SOLID-STATE BEVERAGE ADDITIVE CONTAINER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket cap capable of receiving a functional additive in a solid state, and more particularly, to a bucket cap capable of accommodating a functional additive in a solid state, And a pair of inner caps each of which is integrally extended and sealed in a tight fitting manner so as to be provided in the bottle cap so that the solid functional additive added at the time of drinking can be in contact with air and moisture. The present invention relates to a bottle cap capable of receiving a functional additive in a solid state, which can reduce the manufacturing cost by simplifying the number of components and the manufacturing process.

In recent years there has been growing interest in a bucket cap having an inner cap inside a bucket cap that is coupled to an inlet of a beverage container and which can add a separate functional additive to the contents in the container.

The conventional construction of the butterfly cap according to the prior art for accommodating the functional additive in the beverage container is characterized in that an inner cap accommodating the functional additive is formed with a plurality of drillable holes on the side with the upper portion opened, And an upper cap which covers the upper portion of the lower cap and is screwed to an inlet of the beverage container or an outer periphery of the lower cap.

However, in the case of the bucket cap according to the related art, since the fitting structure for filling the inner cap with the additive and sealing the upper and lower parts of the inner cap must be formed in the upper cap and the lower cap, The additional coupling structure for the closed structure is required in the upper cap and the lower cap, which complicates the manufacturing process and increases the manufacturing cost.

In addition, since the upper cap and the lower cap need to be independently coupled at the upper and lower ends of the inner cap, it is difficult to realize a structure in which the gap formed at the upper and lower ends of the inner cap is completely sealed, There is a problem that the additive reacts with oxygen or moisture in the air to be deteriorated or deteriorated.

In addition, since most of the inner cap is formed of a synthetic resin material of the same material as the upper cap and the lower cap, there is a problem that the gap is further widened because the shape is deformed due to sensitivity to temperature change and pressure change.

Accordingly, there is a desperate need for a technology for a bottle cap which can improve the watertightness structure so that the solid functional additive can be stored for a long period of time, .

Open Patent Publication No. 10-2012-0072582 (Published on July 4, 2012)

SUMMARY OF THE INVENTION Accordingly, the present invention has been conceived to solve the above problems, and it is an object of the present invention to provide a bucket cap which is coupled to an inlet of a beverage container and which has a mutually facing structure on the inner surface of a cap- The inner caps of the pair are integrally extended and sealed in a tight fitting manner so that the possibility that the solid state functional additive added to the bottle at the time of drinking can be brought into contact with air and moisture can be fundamentally blocked The present invention also provides a bottle cap capable of accommodating a solid state functional additive which can simplify the number of components and the manufacturing process and thereby reduce manufacturing costs.

In order to attain the above object, the present invention provides a bottle cap capable of receiving a functional additive in a solid state according to an embodiment of the present invention, the bottle cap having a functional additive added at the time of drinking and being coupled to an inlet of a beverage container, An annular fitting groove to be fitted into the upper end of the inlet is formed around the upper periphery of the outer periphery, a plurality of drinking utensils for drinking the drinking water are formed at regular intervals along the circumference of the circular shape, A lower cap vertically provided on the lower inner surface of the inner cap; And an upper inner cap having a one-to-one correspondence structure with the upper portion of the lower inner cap and having a lower portion opened to be coupled by interference fit, the upper inner cap being perpendicular to the upper inner surface, And an upper cap screwed to the outer periphery of the inlet of the beverage container.

The lower inner cap provided on the lower cap may be formed of a relatively soft synthetic resin material as compared with the upper inner cap provided on the upper cap.

In the buttercapped cap capable of receiving the functional additive in the solid state according to the embodiment of the present invention, the lower portion of the upper inner cap and the upper portion of the lower inner cap are provided with respective step portions which are cross- It can have a watertight structure.

The bottle cap capable of receiving the functional additive in the solid state according to the embodiment of the present invention is characterized in that the first step formed on the upper inner cap is provided on the inner surface and the second step formed on the lower inner cap is provided on the outer surface, And the lower side portion may surround the upper portion of the lower inner cap.

The bottle cap capable of receiving the functional additive in the solid state according to the embodiment of the present invention is characterized in that the upper inner cap and the lower inner cap which are coupled by a pair of opposed stepped portions are separated from the beverage container The upper inner cap can be separated from the lower inner cap attached to the beverage container.

The depth of the step of the upper inner cap and the depth of the lower inner cap is formed to be longer than 180 degrees when the upper cap screwed to the beverage container is separated from the upper inner cap and the lower inner cap according to the embodiment of the present invention. So that the watertight structure can be improved.

The upper inner cap and the lower inner cap may each have a length that extends in an integral structure at the inner surface center portion of the upper cap and the lower cap and does not exceed the entrance end of the upper cap and the lower cap.

The upper inner cap and the lower inner cap have a structure in which the length of the diameter decreases as the distance from the side of the opening portion in which the stepped portions to be coupled with each other is reduced is increased so that the sealing force can be improved by increasing the coupling force.

The bucket cap capable of receiving the functional additive in the solid state according to the embodiment of the present invention is characterized in that an annular sealing projection or a packing groove is formed on the lower inner surface of the upper inner cap provided on the upper cap, A sealing groove or a sealing protrusion corresponding to the sealing projection or the packing groove is formed on the upper outer surface of the upper inner cap and the lower portion of the upper inner cap surrounds the upper portion of the lower inner cap.

The bucket cap capable of receiving the functional additive in the solid state according to the embodiment of the present invention is characterized in that a protrusion for preventing deformation is formed on the bottom surface of the lower inner cap to support the shape of the lower inner cap when the upper inner cap and the lower inner cap are engaged have.

The upper inner cap has a shoulder jaw formed in a stepped structure at the upper end edge of the inner surface so that the end of the lower inner cap can be prevented from being inserted beyond a predetermined depth.

A bottle cap capable of receiving a functional additive in a solid state according to an embodiment of the present invention is a bottle cap having a functional additive added at the time of drinking and being coupled to an inlet of a beverage container, ≪ / RTI > And a lower cap formed on the inner surface of the upper cap and the lower cap to face each other in a one-to-one correspondence with each other, A pair of inner caps to be coupled can be integrally formed.

The lower cap may be formed of a soft synthetic resin material relatively soft compared to the upper cap.

The bucket cap capable of receiving the functional additive in the solid state according to the embodiment of the present invention is configured such that the lower portion of the upper inner cap provided on the upper cap and the upper portion of the lower inner cap provided on the upper cap are cross- Each having a stepped portion formed to have a double watertight structure.

The bottle cap capable of receiving the functional additive in the solid state according to the embodiment of the present invention is characterized in that the first step formed on the upper inner cap is provided on the inner surface and the second step formed on the lower inner cap is provided on the outer surface, And the lower side portion may surround the upper portion of the lower inner cap.

As described above, according to the present invention, a pair of inner caps each having a mutually facing structure are formed so as to extend integrally on the inner surface of the cap stopper for cap fixing and the inner cap of the inner tube for constituting the butterfly cap, Thereby providing a bottle cap capable of storing a solid functional additive for a long period of time.

Further, according to the present invention, a lower inner cap is formed of soft synthetic resin on the inner surface of the lower cap, an upper inner cap is formed of a strong synthetic resin material on the inner surface of the upper cap, There is an effect of providing a bottle cap capable of improving the watertightness structure when the shape is deformed by providing an elastic force at the time of the interference fit.

It is another object of the present invention to provide a bottle cap capable of improving the sealing force by a double watertight structure having a plurality of stepped portions which are mutually crossed and joined to the lower side portion of the upper inside cap and the upper side portion of the lower inside cap .

The present invention also provides an effect of providing a bottle cap capable of being completely sealed by forming a depth of a step of the upper inner cap and a lower inner cap cross-linked by a length of the upper cap which is screwed to the beverage container and rotated by 180 degrees or more. have.

In addition, the present invention has the effect of enhancing the sealing force by increasing the binding force when the diameters of the upper inner cap and the lower inner cap are increased in the direction toward the opening side and are tightly engaged with each other.

Further, in the present invention, an annular sealing protrusion is formed around the lower inner surface or outer surface of the upper inner cap, and corresponding annular packing protrusions or packing grooves are formed on the upper outer surface or the inner surface of the lower inner cap, It is effective.

In addition, the present invention can reduce the number of parts and simplify the manufacturing process by forming the upper inner cap and the lower inner cap integrally instead of forming the hermetic structure with the inner cap on the inner cap and the inner cap constituting the butter cap, And the manufacturing cost is reduced.

Further, in the present invention, when a pair of inner cap heights formed on the upper and lower caps are formed so as not to exceed the inlet ends of the upper and lower caps, the solid functional additive drops off to the outside of the lower cap And when the upper cap is recombined with the beverage container, there is an effect of preventing the reverse flow phenomenon in which the beverage leaks out even if the beverage container is turned upside down.

In addition, the present invention has the effect of supporting the lower inner cap when the upper and lower inner caps are engaged by forming a projection for preventing deformation on the bottom surface of the lower inner cap constituting the lower cap.

In addition, the present invention is characterized in that a shoulder jaw is formed in a stepped structure at the upper end edge of the inner surface of the upper inner cap to prevent the inner cap from being broken by unreasonably connecting the inner cap with the upper inner cap, .

1 is a perspective view of a butterfly cap capable of receiving a functional additive in a solid state according to an embodiment of the present invention;
FIG. 2 is an exploded assembly diagram of a bucket cap capable of receiving a solid-state functional additive according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of the bucket cap shown in Figs. 1 and 2
4 to 5 are a perspective view and a cross-sectional view of an upper cap according to an embodiment of the present invention.
6 to 7 are a perspective view and a cross-sectional view of a lower cap according to an embodiment of the present invention.
8 is a cross-sectional view of a bottle cap according to another embodiment of the present invention

The description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas.

Meanwhile, the meaning of the terms described in the present invention should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, the identification code does not describe the order of each step, Unless otherwise stated, it may occur differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view of a bottle cap capable of receiving a functional additive in a solid state according to an embodiment of the present invention, and FIG. 2 is an exploded view of a bottle cap capable of accommodating a solid functional additive according to an embodiment of the present invention.

As shown in the drawings, a bucket cap capable of receiving a functional additive in a solid state according to an embodiment of the present invention includes a lower cap 100 and a lower cap 200 which are coupled to each other to form a containing space for containing a functional additive, And is coupled to an inlet of the beverage container.

More specifically, the lower cap 100 has an annular fitting groove 101 which is fitted around the upper end of the mouth of the beverage container, and a plurality of sound holes 102 for drinking the beverage, And the lower inner cap 110 having a circular tubular shape with an open top can be vertically provided on the lower inner surface.

In addition, the upper cap (200) has a circular tubular upper inner cap (210) having a one-to-one correspondence with the upper portion of the lower inner cap (110) have.

The synthetic resin material constituting the lower cap 100 may be formed of a relatively soft synthetic resin material as compared with the upper cap 200 so that the lower inner cap 110 of the lower cap 100 is inserted into the upper cap 200 It is possible to increase the adhesive force and prevent the deformation of the shape due to the change in temperature and pressure during storage for a long period of time .

In the embodiment of the present invention, the lower cap 100 may be formed of LDPE (low density polyethylene) which is less affected by changes in pressure or temperature, and the upper cap 200 may be formed of polypropylene Propylene), but the present invention is not limited thereto and may be formed of various kinds of synthetic resin materials.

Meanwhile, in the embodiment of the present invention, the cylindrical body constituting the outer shape of the upper cap 200 is formed in such a structure that the inner side has an inner periphery having a uniform diameter and the lower portion opens, The inner circumference can be screwed to the outer periphery of the inlet of the beverage container.

Although the upper cap 200 is formed so as to entirely surround the outside of the lower cap 100 in accordance with the embodiment of the present invention, Or may be formed in a structure surrounding a part thereof.

FIG. 3 is a cross-sectional view of the bucket cap shown in FIGS. 1 to 2, FIGS. 4 to 5 are a perspective view and a sectional view of a top cap according to an embodiment of the present invention, It is a perspective view and a cross-sectional view.

The bucket cap according to the embodiment of the present invention will be described in more detail with reference to FIG.

As shown in the figure, in the bottle cap according to the embodiment of the present invention, the upper cap (200) is threaded at the periphery of the main body so as to fix the bottle cap to the inlet of the beverage container and the lower cap A mouthpiece for drinking a beverage in the beverage container may be formed on a side surface of the main body while having a lower inner cap 110 for storing a functional additive in a solid state.

As shown in the drawings, a bottle cap 10 according to an embodiment of the present invention includes an upper cap 210 which is paired with the lower inner cap 110 so as to face each other, That is, a pair of inner caps 110 and 210 may be integrally formed by being extended from the lower cap 100 and the upper cap 200, respectively, and the inner caps 110 and 210 may be sealingly coupled to each other by interference fit.

The lower inner cap 210 and the upper inner cap 210 are provided with stepped portions 211 and 111 which are cross-coupled to each other in a one-to-one correspondence with each other. The upper inner cap 210 and the lower inner cap 210 have a double water- have.

In this case, as shown in the figure, the first step 211 formed at the upper inner cap 210 may be formed to protrude from the inner surface, and the second stepped portion 211 formed at the lower inner cap 110 The upper inner cap 210 may be formed to protrude from the outer surface of the lower inner cap 100, and the lower inner cap 210 may surround the upper portion of the lower inner cap 100 as a whole.

Meanwhile, the bottle cap 10 according to the embodiment of the present invention is configured such that when the upper cap 200 screwed to the beverage container is separated from the beverage container when drinking, the lower cap 100 The upper inner cap 210 can be detached from the upper inner cap 110. [

That is, even if the upper inner cap 210 and the lower inner cap 110 are interference-fit by the pair of facing step portions 211 and 111, the lower cap 100, which is formed integrally with the lower inner cap 110, And the upper cap 210 is separated from the beverage container when the upper cap 200 is separated from the beverage container by forming an inclined surface for facilitating separation while tightly coupling the parts coupled by the step portions 211 and 111. [ Can be separated.

The depth of the step portions 211 and 111 of the upper inner cap 210 and the lower inner cap 110 may be greater than 180 degrees when the upper cap 200 is screwed to the beverage container. And a pair of the inner cap 210 and the inner cap 210 are combined with each other. Then, even when the inner cap 210 is located inside the beverage container while receiving the functional additive, sufficient coupling sections can be secured to prevent water from penetrating. The watertight structure can be improved.

As described above, the upper inner cap 210 and the lower inner cap 110 can be injection-molded so as to extend in an integral structure at the inner surface center portion of the upper cap 200 and the lower cap 100, The height of the upper inner cap 210 and the lower inner cap 110 can be set to a length that does not exceed the entrance end of the upper cap 200 and the lower cap 100 as shown in the drawing .

Also, in the embodiment of the present invention, the lower inner cap 110 is formed to have a structure in which the diameter of the inner peripheral edge gradually decreases as the distance from the side of the opening where the step portion 111 is located decreases. However, The length of the inner circumferential edge gradually decreases as the distance from the opening side in which the step portion 211 is located is increased.

That is, when the lower inner cap 110 and the upper inner cap 210 having different elastic forces are combined, if the diameter of the inner circumferential portion is gradually reduced in length, an elastic force is applied to the contact surface, The watertight structure can be improved while being deformed.

The bucket cap 10 according to the embodiment of the present invention includes a protrusion 120 for preventing deformation from being formed on the bottom surface of the lower inner cap 110 so that the coupling between the upper inner cap 210 and the lower inner cap 110 So that it is possible to support the shape of the cap 110 in the lower portion.

In the embodiment of the present invention, the upper inner cap 210 has a shoulder jaw 220 formed in a stepped structure at the upper end edge of the inner surface to prevent the lower end of the lower inner cap 110 from being inserted over a certain depth can do.

8 is a cross-sectional view of a bottle cap according to another embodiment of the present invention.

1 to 7 are the same in function and operation, and a detailed description thereof will be omitted.

As shown in the drawing, a bucket cap 10 capable of receiving a functional additive in a solid state according to another embodiment of the present invention has a packing groove (not shown) formed on a lower inner surface of the upper inner cap 210, And an annular sealing protrusion 112 corresponding to an upper outer surface of the lower inner cap 110 formed in the lower cap 100 is formed and the sealing protrusion 112 is formed in the packing recess 212, So that the functional additive located inside the beverage container can be further prevented from permeating the beverage water.

As shown in the figure, the sealing projection 112 has a gentle inclination so that when the upper inner cap 210 and the lower inner cap 110 are coupled to each other, According to the present invention, the positions of the upper inner cap 210 and the lower inner cap 110 in which the sealing projection 112 and the packing groove 212 are formed can be changed.

As described above, in the bottle cap 10 according to the embodiment of the present invention, the lower portion of the upper inner cap 210 is connected to the upper portion of the lower inner cap 110 by the sealing projection 112 and the packing groove 212 It is possible to provide a multi-structure watertight structure by providing an additional coupling structure in addition to the tight coupling and the tight coupling by the step portion.

As described above, according to the present invention, a pair of inner caps each having an opposing structure is formed on the inner surface of the cap stop fixing cap and the inner cap for the drinking utensil constituting the butterfly cap, There is an effect of providing a bottle cap capable of storing a solid functional additive for a long period of time.

Further, according to the present invention, a lower inner cap is formed of soft synthetic resin on the inner surface of the lower cap, an upper inner cap is formed of a strong synthetic resin material on the inner surface of the upper cap, There is an effect of providing a bottle cap capable of improving the watertightness structure when the shape is deformed by providing an elastic force at the time of the interference fit.

It is another object of the present invention to provide a bottle cap capable of improving the sealing force by a double watertight structure having a plurality of stepped portions which are mutually crossed and joined to the lower side portion of the upper inside cap and the upper side portion of the lower inside cap .

The present invention also provides an effect of providing a bottle cap capable of being completely sealed by forming a depth of a step of the upper inner cap and a lower inner cap cross-linked by a length of the upper cap which is screwed to the beverage container and rotated by 180 degrees or more. have.

In addition, the present invention has the effect of enhancing the sealing force by increasing the binding force when the diameters of the upper inner cap and the lower inner cap are increased in the direction toward the opening side and are tightly engaged with each other.

Further, in the present invention, an annular sealing protrusion is formed around the lower inner surface or outer surface of the upper inner cap, and corresponding annular packing protrusions or packing grooves are formed on the upper outer surface or the inner surface of the lower inner cap, It is effective.

In addition, the present invention can reduce the number of parts and simplify the manufacturing process by forming the upper inner cap and the lower inner cap integrally instead of forming the hermetic structure with the inner cap on the inner cap and the inner cap constituting the butter cap, And the manufacturing cost is reduced.

Further, in the present invention, when a pair of inner cap heights formed on the upper and lower caps are formed so as not to exceed the inlet ends of the upper and lower caps, the solid functional additive drops off to the outside of the lower cap And when the upper cap is recombined with the beverage container, there is an effect of preventing the reverse flow phenomenon in which the beverage leaks out even if the beverage container is turned upside down.

In addition, the present invention has the effect of supporting the lower inner cap when the upper and lower inner caps are engaged by forming a projection for preventing deformation on the bottom surface of the lower inner cap constituting the lower cap.

In addition, the present invention is characterized in that a shoulder jaw is formed in a stepped structure at the upper end edge of the inner surface of the upper inner cap to prevent the inner cap from being broken by unreasonably connecting the inner cap with the upper inner cap, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It is within the scope of the present invention that component changes to such an extent that they can be coped evenly within a range that does not deviate from the scope of the present invention.

10: Bottle cap 100: Hatchback
101: fitting groove 102: sound tool
110: lower inner cap 111: second stage jaw
112: sealing projection 120: projection
200: upper cap 210: upper cap
211: first stage jaw 212: packing groove
220: Shoulder jaw

Claims (15)

A bucket cap (10) having a functional additive added at the time of drinking and coupled to an inlet of a beverage container,
An annular fitting groove (101) fitted to the upper end of the mouth of the beverage container is formed around the upper end of the outer periphery, and a plurality of sound holes (102) for drinking the drinking water are formed at regular intervals along the circumference of the circular shape A lower cap (100) having a lower inner cap (110) shaped like a circular pipe and having an upper portion opened vertically to a lower inner surface; And
A top cap 210 having a circular tubular shape having a one-to-one correspondence with the upper portion of the lower inner cap 110 and having a bottom open to be coupled by interference fit, And an upper cap (200) having an inner periphery threadedly engaged with an outer periphery of an inlet of the beverage container,
The lower inner cap 110 provided in the lower cap 100 is formed of a relatively soft synthetic resin material as compared with the upper inner cap 210 provided in the upper cap 200,
The lower inner cap 210 and the upper inner cap are respectively provided with stepped portions 211 and 111 cross-coupled to each other in a one-to-one correspondence with each other,
The first stepped portion 211 formed on the upper inner cap 210 is provided on the inner surface and the second stepped portion 111 formed on the lower inner cap 110 is provided on the outer surface, The upper portion of the lower inner cap 110 is connected to the lower inner cap 110,
The upper inner cap 210 and the lower inner cap 110 which are joined by the pair of opposed step portions 211 and 111 are arranged in the beverage container when the upper cap 200 screwed to the beverage container is separated from the beverage container when drinking. Wherein the upper inner cap (210) is detached from the lower inner cap (110) of the coupled lower cap (100)
delete delete delete delete The method according to claim 1,
The depth of the step portions 211 and 111 of the upper inner cap 210 and the lower inner cap 110 is formed to be longer than 180 degrees when the upper cap 200 screwed to the beverage container is separated to improve the watertight structure Bottle cap that can accommodate solid state functional additives
[7] The apparatus according to claim 1 or 6, wherein the upper inner cap (210) and the lower inner cap (110)
And the upper cap (200) and the lower cap (100) are integrally formed at a central portion of the inner surface of the upper cap (200) and the lower cap (100) Bottle cap
8. The apparatus of claim 7, wherein the upper inner cap (210) and the lower inner cap (110)
And the sealant is improved by increasing the bonding force when the sealant is formed in a structure in which the length of the sealant is reduced as the distance from the side of the opening where the step portions (211, 111) Acceptable bottle cap
9. The method of claim 8,
An annular packing groove 212 is formed on the lower inner surface of the upper inner cap 210 of the upper cap 200,
A sealing protrusion 112 corresponding to the packing recess 212 is formed on the upper outer surface of the lower inner cap 110 of the lower cap 100,
And a lower portion of the upper inner cap (210) is coupled with a multi-structure watertight structure surrounding the upper portion of the lower inner cap (110).
10. The method of claim 9,
Wherein a protrusion (120) for preventing deformation is formed on the bottom surface of the lower inner cap (110) to support the shape of the lower inner cap (110) when the upper inner cap (210) Bottle cap that can accommodate functional additives in state
11. The apparatus according to claim 10, wherein the upper inner cap (210)
And a shoulder jaw (220) formed in a stepped structure at an upper end edge of the inner surface to prevent the end of the lower inner cap (110) from being inserted over a certain depth.
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