KR101525196B1

KR101525196B1 - bottle cap and manufacturing method thereof

Info

Publication number: KR101525196B1
Application number: KR1020140136062A
Authority: KR
Inventors: 유성모
Original assignee: 유성모
Priority date: 2014-10-08
Filing date: 2014-10-08
Publication date: 2015-06-10
Also published as: WO2016056713A1

Abstract

The present invention relates to a bottle cap, and a method to manufacture a bottle cap. According to the present invention, the bottle cap comprises: an inner cap including an accommodating space to accommodate an addition agent added to a container, and has a rod shape with an opened lower part; a lower cap coupled to an inlet of the container accommodating and surrounding an outer circumference of the inner cap, including a watertight coupling unit coupled to a lower part of the inner cap in a multi-close fit manner to have a multi-watertight structure; and an upper cap screwed to an upper part of the lower cap while being fixated and coupled to an upper end of the inner cap. Therefore, the bottle cap and the method to manufacture a bottle cap prevents a shape from being changed due to a change in temperature and pressure by including the inner cap therein to accommodate the addition agent added to the container and sealing the inner cap in the multi-watertight structure, and reduce the manufacturing costs by reducing the number of components and simplifying a manufacturing process.

Description

BOTTLE CAP AND MANUFACTURING METHOD THEREOF [0001]

More particularly, the present invention relates to a bottle cap and a method of manufacturing a bottle cap, and more particularly, to a method of manufacturing a bottle cap and a bottle cap by providing an inner cap capable of accommodating an additive added to the container, Which can reduce the number of parts and simplify the manufacturing process, thereby reducing the manufacturing cost.

In recent years, there has been a growing interest in functional buttercaps which have an inner cap for adding an additive in the container and can add a separate additive to the contents in the container.

A gasket portion surrounding the inner cap and sealingly coupling the lower portion of the inner cap while being fixedly coupled to the bottom of the lower cap and the lower cap coupled to the inlet portion of the container portion; There was a technology involved.

However, in the case of the conventional bottle cap, since a separate gasket is required to seal the lower portion after filling the inner cap with the additive, the number of parts increases, thereby increasing manufacturing process and manufacturing cost.

Further, in the case of the gasket portion coupled with the lower side of the inner cap, since a single watertight structure using one coupling groove is used, there is a problem that moisture leaks to the side surface of the coupling groove portion for a long time.

In addition, since the inner cap coupled with the gasket portion and the lower cap is formed of a hard synthetic resin material similar to the lower cap, when the shape is deformed due to sensitivity to temperature change and pressure change, there is a problem that the additive in the inner cap is deformed due to moisture .

Accordingly, there is an urgent need for a bottle cap capable of improving the sealing performance of the inner cap in which the additive is contained, reducing the number of parts, simplifying the manufacturing process, and reducing the manufacturing cost.

Published Japanese Patent Application No. 10-2007-0022082 (published Feb. 23, 2007)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in an effort to solve the above problems, and it is an object of the present invention to provide an internal cap capable of accommodating an additive added to a container and sealing the internal cap with multiple water- Which can reduce the number of components and simplify the manufacturing process, thereby reducing the manufacturing cost.

According to an aspect of the present invention, there is provided a bucket cap comprising: an inner cap having a receiving space therein for receiving an additive to be added to a container; And a watertight coupling portion which encloses the outer periphery of the inner cap and is coupled to the injection port of the container and is coupled with the lower portion of the inner cap in a multi-piece fitting manner to form a multiple watertight structure. And an upper cap screwed to an upper portion of the lower cap while being fixedly coupled to an upper end of the inner cap.

Wherein the watertight coupling portion has a cylindrical body formed by extending the inside of the lower cap into the inside of the container and having a discharge port for discharging the additive to the side surface and surrounding the periphery of the inside cap as a whole; And a packing protrusion protruding above the bottom surface of the main body and coupled to the inner surface of the lower portion of the inner cap in an interference fit manner.

Wherein the packing protruding portion constituting the watertight coupling portion has a hemispherical shape having a diameter that is relatively shorter than a length of a lower side diameter of the inner cap to be inserted into an inner surface of a lower side portion of the inner cap at an upper end thereof; And a cylindrical body extending to a lower portion of the insertion portion and having a length of an outer diameter relatively longer than a length of a lower side of the inner cap and a length of an outer diameter of the body being increased toward the lower side, And an extension portion.

The watertight coupling portion may include a packing groove portion for coupling the lower portion of the inner cap in a forced fit manner around the side surface of the expanded portion of the packing projection.

The inner cap may be formed with a step portion having a length corresponding to the depth of the packing groove portion around the outer peripheral surface of the lower side portion.

The depth of the packing groove and the length of the step are such that when the lower end of the inner cap is inserted into the upper end of the packing groove when the inner cap is engaged with the lower cap fixedly coupled to the lower cap, .

In the bottle cap according to the embodiment of the present invention, at least one sealing projection is formed around the inner surface of the lower end portion of the inner cap, and a sealing projection corresponding to the sealing projection is formed on the side surface of the extension of the packing projection constituting the packing groove A packing protrusion or a packing groove may be formed.

The packing protrusion may be formed with a hollow for support for preventing deformation of the packing protrusion at the center of the bottom surface.

The sealing protrusions and the packing protrusions are formed to have a gentle inclination around the sealing protrusions, so that when the upper cap and the lower cap are screwed together, the sealing protrusions can be coupled to each other over the surface of the packing protrusion.

In the bottle cap according to the embodiment of the present invention, the packing groove portion coupled with the lower portion of the inner cap may be formed to have a narrower width as it goes downward.

In the bucket cap according to the embodiment of the present invention, the inner cap is formed of soft synthetic resin, and the water-tight coupling portion of the lower cap coupled to the lower portion of the inner cap by interference fit is formed of a hard synthetic resin having a relatively high strength .

The inner cap may be formed of LDPE (low density polyethylene) which is less affected by changes in pressure or temperature, and the lower cap may be formed of polypropylene (PP).

The bucket cap according to the embodiment of the present invention may be formed such that the height of the outlet formed in the main body constituting the watertight coupling portion does not exceed the lower end of the plug coupling portion constituting the lower cap coupled to the outside of the container inlet.

According to another aspect of the present invention, there is provided a bucket cap comprising: an inner cap having an interior space for receiving an additive to be added to a container; A cap engagement portion formed on an outer circumferential surface of a rib having a height corresponding to a flange portion formed on an outer peripheral surface of a lower end portion of the container cap and coupled to an outer side of the container injection port; And a watertight coupling portion coupled to the lower portion in a multi-piece fitting manner to form a multiple watertight structure. And an upper cap which is engaged with the upper end of the inner cap and is screwed on the upper portion of the lower cap so that the lower end of the inner cap is coupled to the watertight coupling portion of the lower cap in an interference fit manner.

The rib formed on the outer circumferential surface of the plug connecting portion may have one end in the longitudinal direction extending to the end of the flange portion and gently forming in the longitudinal direction.

In the bottle cap according to another embodiment of the present invention, the height of the discharge port formed in the main body constituting the watertight coupling portion may not exceed the lower end of the plug connection portion.

In the bottle cap according to another embodiment of the present invention, at least one sealing projection is formed around the inner surface of the lower end portion of the inner cap, and on the side of the expansion portion of the packing projection constituting the packing groove, Corresponding packing protrusions or packing grooves may be formed.

In the bottle cap according to another embodiment of the present invention, the packing groove portion coupled with the lower portion of the inner cap may be formed to have a narrower width toward the lower portion.

The inner cap may be formed of a soft synthetic resin, and the waterproof coupling portion of the lower cap coupled to the lower portion of the inner cap by interference fit may be formed of a hard synthetic resin having a relatively higher strength than the inner cap.

According to another aspect of the present invention, there is provided a method of manufacturing a butterfly cap, the method including: fixing an inner cap to an upper cap; And gripping the rib formed on the outer circumferential surface of the plug cap engagement portion in a single operation along the outer surface of the flange portion; And screwing the lower cap into the upper cap with the inner cap fixedly coupled thereto.

INDUSTRIAL APPLICABILITY As described above, the present invention has the effect of improving the sealing ability by providing an inner cap inside the container capable of containing the additive to be added in the container and sealing the inner cap with multiple watertight structures.

According to the present invention, a packing protrusion and a packing groove are formed on a bottom surface of a watertight fitting body constituting a lower cap, instead of coupling a gasket to a lower cap to seal the inner cap, so that the packing protrusion is fitted to the lower side of the inner cap And at the same time, the lower end of the inner cap is forcedly engaged with the packing groove, thereby achieving a multi-water tight structure to prevent the additive in the cap from leaking to the outside.

In addition, the present invention realizes the inner cap material as soft synthetic resin as compared with the hard synthetic resin constituting the lower cap, thereby increasing the adhesion while deforming the shape when tightly adhered, and preventing the shape from being changed or broken even in the case of temperature change and pressure change .

According to the present invention, the packing protrusion inserted into the lower portion of the inner cap increases in length as the outer diameter increases, and the outer surface of the packing protruding portion has a repulsive force with the inner surface of the inner cap, And it is possible to prevent deterioration of watertightness due to changes in temperature and pressure.

According to the present invention, a step portion is formed at a length corresponding to the depth of the packing groove portion around the outer peripheral surface of the lower portion of the inner cap to improve the adhesion between the outer surface of the packing groove portion and the outer peripheral surface of the inner cap, Further leakage can be prevented.

Further, in the present invention, an annular sealing projection is formed around the lower inner surface of the inner cap, and an annular packing protrusion or packing groove corresponding to the annular sealing protrusion is formed on the side of the expanded portion of the packing protrusion to improve the sealing force, There is an effect that can make you feel.

In addition, the present invention has the effect of reducing the number of components and simplifying the manufacturing process by integrally forming a packing protrusion on the bottom surface of the body of the watertight coupling portion constituting the lower cap, instead of forming a closed structure with a separate component such as a gasket .

Further, according to the present invention, the depth of the packing groove portion and the length of the step portion are formed to have a sufficient length to be engaged while the upper cap is engaged with the lower cap when the upper cap is engaged with the lower cap, .

In addition, the present invention is characterized in that the height of the discharge port formed in the main body constituting the watertight coupling portion is formed so as not to exceed the end of the plug connection portion which is coupled to the outside of the container injection port so that the contents of the container can not come up along the cap .

Further, the present invention is characterized in that a supporting hollow groove for preventing the deformation of the packing protrusion is formed at the bottom center portion of the packing protrusion protruding from the bottom surface of the main body constituting the watertight coupling portion to improve the bonding force between the packing protrusion and the inner cap .

In addition, the present invention provides a rib which is formed at the same height as the flange portion formed on the outer peripheral surface of the lower end of the cap engagement portion constituting the lower cap and coupled to the outside of the container injection port and formed into a gentle slope in the longitudinal direction, The gripping process for gripping the ribs after passing through the flange portion during the cap assembly process can be reduced, thereby reducing the manufacturing process.

Brief Description of Drawings Fig. 1 is a perspective view showing a coupling structure of a butterfly cap according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of a bucket cap according to an embodiment of the present invention.
Fig. 3 is a bottom perspective view of the upper cap constituting the bucket cap shown in Fig.
Fig. 4 is a bottom plan view of the upper cap shown in Fig.
Fig. 5 is a perspective view of an inner cap constituting the butterfly cap shown in Fig. 2
6 is a cross-sectional view of the inner cap shown in Fig. 5
Fig. 7 is a side view of the inner cap shown in Fig. 5
Fig. 8 is a perspective view of the lower cap constituting the bucket cap shown in Fig.
Fig. 9 is a perspective view of the lower portion of the lower cap shown in Fig.
Fig. 10 is a perspective view of the lower portion of the lower cap shown in Fig.
11 is a sectional view showing the watertight coupling portion of the lower cap shown in Figs. 8 to 10. Fig.
Fig. 12 is a cross-sectional view of the watertight coupling portion of Fig. 11,
13 is a plan view of the lower cap shown in Figs. 8 to 10
14 is a sectional view of the lower cap shown in Figs. 8 to 10
Figure 15 is an external view of a bottle cap according to an 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 view showing a coupling structure of a butterfly cap according to an embodiment of the present invention, and FIG. 2 is an exploded assembly view of a butterfly cap according to an embodiment of the present invention.

As shown in the drawing, a bucket cap according to an embodiment of the present invention may include an inner cap 100, a lower cap 200, and an upper cap 300.

More specifically, the inner cap 100 may be formed into a bar shape having an accommodating space for accommodating the additive to be added in the container and an open bottom.

In addition, the lower cap 200 surrounds the outer periphery of the inner cap 100 and is coupled to the injection port of the container. The lower cap 200 is coupled with the lower portion of the inner cap 100 in a multi-piece fitting manner to form a multi- And the watertight coupling portion 400 may be provided.

Hereinafter, the lower cap 200 and the watertight coupling portion 400 will be described in more detail with reference to FIGS. 8 to 12, which will be described later.

The upper cap 300 may be screwed to the upper portion of the lower cap 200 while being fixedly coupled to the upper end of the inner cap 100.

FIG. 3 is a bottom perspective view of the upper cap constituting the bucket cap shown in FIG. 2, and FIG. 4 is a bottom plan view of the upper cap shown in FIG.

The upper cap shown in Figs. 3 to 4 will now be described in detail.

The upper cap 300 constituting the butter cap according to the embodiment of the present invention includes an inner cap head contact portion 310 for fixing the upper side of the inner cap 100 described later with reference to FIGS. And an inner cap head fitting groove (320).

Since the inner cap head 101 of the inner cap 100, which will be described later, is formed with an inclined upper surface, the inner cap head contact portion 310 is formed in a gentle slope so as to make surface contact with the upper surface of the inner cap head 10 .

The inner cap head fitting groove 320 is formed by inserting the upper surface of the inner cap head 101 in an interference fit manner along the inclined surface of the inner cap head contact portion 310 so that the upper cap 300 and the inner cap 100 They can be fixed to each other.

Further, an upper cap screw part 330 for screwing the lower cap 200 to be described later may be formed on the inner surface of the upper cap 300.

As described above, in the embodiment of the present invention, the upper cap 300 is fixedly coupled to the upper portion of the inner cap 100, and the upper cap 300 and the lower cap 200 described later are screwed into the inner cap 100 The contained additive can be squeezed out of the bottle cap without leaking.

Fig. 5 is a perspective view of an inner cap constituting the bucket cap shown in Fig. 2, Fig. 6 is a sectional view of the inner cap shown in Fig. 5, and Fig. 7 is an outer side view of the inner cap shown in Fig.

As shown in the drawing, the inner cap 100 according to the embodiment of the present invention may be formed into a rod shape having an accommodating space for accommodating the additive to be added in the container, and a bottom open as a whole.

More specifically, the inner cap 100 may have an inner cap head 101 fixedly coupled to the inside of the upper cap 300 shown in Figs. 3 to 4 at an upper end thereof.

The inner cap 100 is formed around the outer circumferential surface of the lower portion with a length corresponding to the depth of the packing groove portion 430 constituting the watertight fitting portion 400 of the lower cap 200 described later with reference to FIGS. (110) may be formed.

In this case, the length of the step portion 110 is set such that when the upper cap 300 and the lower cap 200, which are fixedly coupled with the inner cap 100, are mutually rotated and screwed together, the lower end of the inner cap 100 And may be formed to have a length capable of rotating by 180 degrees or more from the beginning of insertion into the upper end of the packing groove portion.

That is, when the lower end of the inner cap 100 is rotated and inserted into the packing groove portion 430 to be described later in an interference fit manner, a sufficient length can be secured for the watertight structure, so that the outer surface of the step 100 and the packing The outer surface of the groove portion 430 is brought into contact with each other at the same time as it is brought into close contact with the outer surface of the groove portion 430 to improve the sealing force against the inner cap 100.

6, at least one sealing protrusion 120 is formed around the inner surface of the lower end of the inner cap 100 to form a packing groove (not shown) formed on the side of the enlarged portion of the packing protrusion 420 423 so that the additive contained in the inner cap 100 is prevented from leaking to the outside, thereby preventing deterioration of the additive.

As shown in the figure, when the upper cap 300 and the lower cap 200 are screwed to each other, the sealing projection 120 is formed to have a gentle inclination so that the sealing projection 120 It can be forced into the packing groove 423.

In the embodiment of the present invention, the inner cap 100 is formed of a soft synthetic resin as compared with the watertight coupling portion 400 of the lower cap 200 described later, and the watertight coupling portion 400 is formed in the inner cap 100 The shape of the inner cap 100 can be maintained by preventing the shape of the inner cap 100 from being deformed even if the temperature or the pressure changes during storage for a long time.

In the embodiment of the present invention, the inner cap 100 may be formed of LDPE (Low Density Polyethylene) material which is less affected by changes in pressure or temperature, The lower cap 200 may be formed of polypropylene (PP) together with the upper cap 300, but it is not limited thereto and may be formed of various kinds of synthetic resin.

Fig. 8 is a perspective view of the lower cap constituting the bucket cap shown in Fig. 2, and Figs. 9 to 10 are perspective views as viewed from the lower side to the lower side and from the lower side to the upper side.

As shown in the drawing, the lower cap 200 according to the embodiment of the present invention is formed as a circular tube as a whole, and the upper cap screw portion 330 of the upper cap 300 described above with reference to FIGS. And a hatch cap screw part (201) screwed together can be formed.

In addition, the lower cap 200 may include a watertight coupling portion 400 and a plug coupling portion 500.

More specifically, the watertight coupling portion 400 is disposed inside the container injection port and encloses the outer periphery of the inner cap 100 described with reference to FIGS. 5 to 7 and accommodates the lower portion of the inner cap 100 and the multi- May be combined to form a multi-water-tight structure.

The flange portion 510 may be formed on the outer peripheral surface of the lower end of the container, and the rib 501 may be formed on the outer peripheral surface of the flange 510.

Here, the rib 501 formed on the outer circumferential surface of the stopper coupling part 500 is formed such that one end in the longitudinal direction thereof is extended to the end of the flange part 510 and gently formed in the longitudinal direction as shown in FIG. 13 .

In the embodiment of the present invention, the watertight coupling portion 400 may include a body 410 and a packing protrusion 420, as shown in the figure.

The main body 410 is formed into a cylindrical shape having an inner side of the lower cap 200 extending to the inside of the container and having a discharge port 401 for discharging the additive to the lower side and surrounding the periphery of the inner cap 100 as a whole .

In this case, the main body 410 is provided with a circular tube-like upper tube 411 on the upper side and a circular bottom 413 on the lower side spaced apart from the upper tube 411 by a predetermined distance, A plurality of supports 412 for connecting and supporting the bottom part 411 and the bottom part 413 may be disposed on the side.

Here, the plurality of support rods 412 extend partly downward from the upper tube 411, and the support rods 412 are opened to form the discharge port 401.

In the embodiment of the present invention, the height of the discharge port 401 formed in the main body 410 constituting the watertight coupling portion 400 is formed so as not to deviate from the lower end of the plug connection portion 500, 300 may be separated from the lower cap 200, the contents and additives of the container may be prevented from rising along the inner cap 100 fixed to the upper cap 300.

The packing protrusion 420 of the watertight coupling part 400 constituting the butterfly cap according to the embodiment of the present invention protrudes above the bottom surface of the main body 410, In a detent manner.

At this time, the packing protrusion 420 constituting the watertight coupling part 400 may include an insertion part 421 and an extension part 422.

The packing protrusion 420 constituting the watertight coupling part 400 of the lower cap 200 according to the embodiment of the present invention will be described in more detail with reference to FIGS. 11 to 13 as follows.

11 to 12 are a cross-sectional view of the watertight coupling portion of the lower cap and a sectional view of the watertight coupling portion coupled to the inner cap, Figs. 13 to 14 are a plan view and a sectional view of the lower cap, &Lt; / RTI >

The packing protrusion 420 constituting the watertight coupling part 400 of the lower cap 200 according to the embodiment of the present invention may include an insertion part 421 and an extension part 422 have.

More specifically, the inserting portion 421 has a diameter that is relatively short compared to the length of the lower side of the inner cap 100 to be inserted into the inner surface of the lower side of the inner cap 100 at the upper end, .

The extension portion 422 extends to the lower portion of the insertion portion 421 and constitutes a cylindrical body whose outer diameter is relatively longer than the lower diameter length of the inner cap 100, The outer surface of the inner cap 100 can be in contact with the inner surface of the inner cap 100 with a repulsive force.

The watertight coupling portion 400 may further include a packing groove 430 for coupling the lower portion of the inner cap 100 in a forced fit manner around the side surface of the expansion portion of the packing protrusion 420, The lower end of the inner cap 100 fixed to the upper cap 300 is positioned at a lower end of the packing groove 430 when the upper and lower caps 300 and 300 are coupled to each other. And may be formed to have a length that can be rotated by 180 degrees or more from the beginning of the insertion.

Since the packing groove portion 430 coupled with the lower portion of the inner cap 100 is formed to have a narrower width as it goes downward, when the packing protrusion 420 is constrained to the lower inner surface of the inner cap 100 Can be coupled to the lower end of the inner cap 100 at the same time in a forced fit manner. As a result, it is possible to realize the interference fit of the double structure.

The packing protrusion 420 of the packing groove 430 has a packing groove 423 corresponding to the sealing protrusion 120 of the inner cap 100 shown in FIGS. (Not shown). Alternatively, the sealing protrusion 120 may be formed as a packing protrusion (not shown) corresponding to the sealing protrusion 120 so that the sealing protrusion 120 may override the packing recess 423.

In addition, the packing protrusion 420 may be formed with a hollow groove 424 for preventing the packing protrusion 420 from deforming at the center of the bottom wall as shown in the figure.

14 to 15, a rib 501 formed on the outer circumferential surface of the plug fitting part 500 constituting the lower cap 200 of the butterfly cap according to the embodiment of the present invention is inserted into the flange portion 510 and may be gently formed in the longitudinal direction.

When the rib 501 formed on the outer circumferential surface of the stopper portion 500 is gently formed at the same height as the flange portion 510 as described above, .

That is, since the height of the ribs 501 is lower than that of the flange portion 510 in the past, when the pneumatic cylinder type finger of the lower cap 200 is gripped by the finger of the pneumatic cylinder type, The height of the ribs 501 of the cap fitting part 500 may be adjusted to the height of the flange part 510 in the case of the bottle cap according to the present invention. So that the finger can be grasped by a single operation.

The ribs 501 formed on the outer circumferential surface of the cap fitting part 500 of the lower cap 200 are fitted to the outer surface of the flange part 510, And the lower cap 200 is screwed into the upper cap 300 to which the inner cap 100 is fixedly coupled, thereby simplifying the manufacturing process.

As described above, the present invention has an effect of improving the sealing performance by providing an inner cap capable of accommodating the additive to be added in the container and sealing the inner cap with multiple water-tight structures.

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.

100: Inner cap 101: Inner cap head
110: step portion 120: sealing projection
200: Lower cap 201: Lower cap thread
300: upper cap 310: inner cap head contact portion
320: Inner cap head fitting groove 330: Upper cap screw
400: Watertight coupling portion 401: Outlet
410: main body 411: upper tube
412: Support base 413:
420: packing protrusion 421:
422: extension part 423: packing groove
430: packing groove portion 431: latching jaw (bottom rising edge)
500: plug connecting portion 501: rib
503: stop thread portion 510: flange portion

Claims

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An inner cap (100) having an inner cap head (101) having an inner space for receiving an additive to be added in the container and formed in a bar shape with an open bottom and an upper surface sloped at an upper end;
A cap engagement portion 500 formed on an outer circumferential surface of the flange portion 510 coupled to the outside of the container injection port and having a height corresponding to the flange portion 510 formed on the outer circumferential surface of the lower end, And a watertight coupling portion 400 which surrounds the outer periphery of the inner cap 100 and is coupled to the lower portion of the inner cap 100 in a multiple interference fit manner to form a multiple watertight structure. And
An inner cap head contact portion 310 formed to have a gentle slope in order to make surface contact with the upper surface of the inner cap head 101 and an inner cap head contact portion 310 having an upper surface of the inner cap head 101, When the inner cap head fitting groove 320 inserted in the inner cap 100 is screwed to the upper part of the lower cap 200 while being fixedly coupled to the upper end of the inner cap 100, And an upper cap (300) for engaging with the watertight coupling portion (400) of the lower cap (200) in a forced fit manner while rotating the lower cap
The inner cap 100 is formed of a soft synthetic resin and the watertight coupling portion 400 of the lower cap 200 which is detainably coupled to the lower portion of the inner cap 100 has a relatively high strength And is formed of a hard synthetic resin,
The watertight coupling portion 400 has a cylindrical shape in which the inside of the lower cap 200 is formed to extend into the interior of the container and has a discharge port 401 for discharging the additive to the side surface, A body 410 to be formed; And a packing protrusion 420 protruding upward from the bottom surface of the main body 410 and coupled to the inner surface of the lower portion of the inner cap 100 in an interference fit manner,
The main body 410 is provided with a circular pipe-shaped upper pipe 411 on the upper side and a circular bottom 413 on the lower side spaced apart from the upper pipe 411 by a predetermined distance,
A plurality of support rods 412 for connecting and supporting the upper tube 411 and the bottom portion 413 are formed on the side surface of the main body 410 so as to extend to a lower side of the upper tube 411, (412) are opened to form the discharge port (401)
The packing protrusion 420 constituting the watertight coupling part 400 is formed to have a diameter of a relatively short length relative to the length of the lower side diameter of the inner cap 100 in order to be inserted into the inner surface of the lower side of the inner cap 100, An insertion portion 421 having a hemispherical shape; And a cylindrical body extending to a lower portion of the insertion portion 421 and having a length of an outer diameter relatively longer than a length of a lower side of the inner cap 100. A length of an outer diameter of the body is increased toward the lower side, And an extension part (422) having a repulsive force and contacting with the inner surface of the base part (100)
The watertight coupling portion 400 has a packing groove portion 430 for tightly fitting the lower portion of the inner cap 100 around the side surface of the extension portion 422 of the packing protrusion 420,
The inner cap 100 is thinner than the outer circumferential surface adjacent to the outer circumferential surface of the lower portion and has a step portion 110 having a length corresponding to the depth of the packing groove portion 430,
The depth of the packing groove portion 430 and the length of the step portion 110 may be set such that the lower end of the inner cap 100 when the inner cap 100 is engaged with the upper cap 300 and the lower cap 200, The packing groove portion 430 is formed to have a length capable of rotating by 180 degrees or more from the beginning of insertion into the upper end of the packing groove portion 430,
The packing groove portion 430 coupled with the lower portion of the inner cap 100 is formed to have a narrower width as it goes down,
At least one sealing protrusion 120 is formed around the inner surface of the lower end of the inner cap 100 and a side surface of the extending portion 422 of the packing protrusion 420 constituting the packing groove 430 A packing groove 423 corresponding to the projection 120 is formed,
When the upper cap 300 and the lower cap 200 are screwed to each other, the sealing projection 120 is formed to have a gentle inclination so that the sealing projection 120 has a binding force And is coupled to the packing packing groove (423)
The rib 501 formed on the outer circumferential surface of the plug connector 500 has one longitudinal end extending gently in the longitudinal direction to the end of the flange 510.

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15. The method of claim 14,
The height of the discharge port 401 formed in the main body 410 constituting the watertight coupling portion 400 may be such that it does not exceed the lower end of the plug coupling portion 500 Features a bottle cap

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15. The apparatus of claim 14, wherein the packing protrusion (420)
And a support hollow groove (424) for preventing deformation of the packing protrusion is formed at the bottom center portion

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15. The method of claim 14,
The inner cap 100 is formed of LDPE (low density polyethylene) which is less affected by changes in pressure and temperature,
Wherein the lower cap (200) is made of polypropylene (PP)

A manufacturing method for manufacturing a butterfly cap according to any one of claims 14, 16, 23, and 27,
Fixing the inner cap (100) to the upper cap (300); And
Gripping the ribs (501) formed on the outer circumferential surface of the plug coupling portion (500) of the lower cap (200) in a single operation along the outer surface of the flange portion (510); And
And screwing the lower cap (200) to the upper cap (300) to which the inner cap (100) is fixedly connected.