KR200339581Y1 - Bottle cap and container having a bottle cap - Google Patents

Abstract

Disclosed is a bottle cap that can be easily opened and closed, and a container including the bottle cap. The cap is a discharge port mounted at the inlet of the container, an inner cap for covering and sealing the discharge portion of the discharge port, a locking hole mounted on the inner cap to fix the discharge portion inserted into the inner cap, and a sliding hole and discharge while sliding along the outer surface of the inner cap. It includes an outer cap to control the binding between the parts. The inner cap advances with the outer cap to seal the discharge portion, and the inner cap and the outer cap can be separated from the outlet by releasing the catch as the outer cap retracts. The simple opening and closing of the caps allows the bottle to be opened and closed and can be used repeatedly until the liquid in the container is used up.

Description

BOTTLE CAP AND CONTAINER HAVING A BOTTLE CAP}

The present invention relates to a bottle cap and a container, and more particularly, to a bottle cap and a container including a bottle cap that can open and close the bottle simply and quickly and can be used indefinitely.

In general, the bottle cap is used to protect the product stored in the bottle by sealing the bottle, and several kinds of bottle caps are used according to the characteristics of each product. For example, there is a bottle cap which cannot be reused once opened, such as a metal bottle cap of a carbonated beverage or beer bottle, or a bottle cap which can be repeatedly opened or closed like a bottle cap of a bottle of mineral water.

Recently, bottle caps that can be opened and closed repeatedly have been widely used because they sell beverages in large quantities. In addition, as the processing technology of synthetic resins is developed day by day, bottle caps and molded articles of bottles using synthetic resin materials are used in various fields.

The bottle cap of a plastic bottle including a conventional PET bottle is formed in a cylindrical shape with one end blocked. A female screw portion is formed on the inner surface of the bottle cap, and a male screw portion is formed at the inlet of the bottle corresponding to the bottle cap, and the bottle cap is engaged with the bottle through screwing and seals the bottle inlet. The bottle cap is mainly used for bottled water and beverage bottles made of synthetic resin.

In order to separate the bottle cap from the bottle by screwing, the bottle body should be fixed with one hand and the bottle cap with the other hand. Conversely, in order to seal the opening of the bottle with the bottle cap, the bottle cap must also be grasped and turned in the other direction. In general, the bottle cap is turned to be more tightly sealed to increase the sealing effect, but the more it is turned, the more difficult it is to turn the bottle cap to open the bottle. As a result, women and the elderly often suffer from illnesses locked by strong people. It can also be cumbersome because the bottle needs to be turned, and excessive wrist strain can occur.

In order to solve the problem of opening and closing, a "plastic resin bottle cap with a ring member" that can open the bottle opening at a time is disclosed in Korean Utility Model Publication No. 199-000974.

1 is a perspective view for explaining a conventional cap.

Referring to Figure 1, the conventional bottle cap 1 is to open the bottle cap without an opener, the pull ring 5 is connected to one side of the bottle cap, the perforated line 7 from the pull ring 5 from the top of the bottle cap (1) It is formed to include a part of the plate portion.

As the pull ring 5 is pulled, a part of the side plate and the upper plate of the pull ring 5 is separated along the perforation line 7. Therefore, the user can open the bottle by pulling the pull ring 5 by hooking the finger ring 5.

However, the bottle cap is also used to seal the bottle once, and once opened, the bottle cap cannot be recycled. Such a bottle cap may be used as a bottle cap of a bottle that frequently opens and closes a bottle, such as a bottle of water, or a bottle of a large amount of beverage, which cannot be consumed all at once and used several times.

Therefore, in order to solve the above problems, an object of the present invention is to simply open and close the bottle, anyone can easily close the bottle cap regardless of the weight of the force and can open the bottle cap without applying excessive force To provide a bottle cap.

In addition, another object of the present invention is to provide a bottle cap that can be reused, and can be used for repeatedly sealing and releasing the bottle cap.

In addition, another object of the present invention is to provide a container including a bottle cap that can easily open and close the bottle, can be effectively bound and separated without excessive force, and can be repeatedly reused.

1 is a perspective view for explaining a conventional cap.

2 is a perspective view for explaining a bottle cap according to the first embodiment of the present invention.

3 is an exploded perspective view of the bottle cap according to the first embodiment.

4 is a partial cross-sectional view of the inner cap according to the first embodiment.

5A is a perspective view of a locking device according to the first embodiment.

5B is a perspective view of another locking mechanism that can be applied to the inner cap according to the first embodiment.

6 is a bottom view of the outer cap according to the first embodiment.

7 is a sectional view of the outer cap according to the first embodiment.

8 to 10 are cross-sectional views for explaining the opening and closing process of the cap according to the first embodiment.

11 is an exploded perspective view of a cap according to a second embodiment of the present invention.

12 is a side cross-sectional view of a cap according to the second embodiment.

13 is a side view for explaining a container according to a third embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10, 20: Bottle 100: Bottle cap

110: outlet 115: outlet body

120: discharge part 122: home

124: O-ring 130: Internal cap

132: Flange section 140: latching mouth

150: Outer cap 152: Hook support

154: Jam 156: Jam Jaw

160: Spring

According to a preferred embodiment of the present invention for achieving the above object of the present invention, the bottle cap is formed at the inlet of the container to discharge the liquid through the discharge portion, the inner cap for sealing the discharge portion of the discharge port, from the inner cap inner surface And a catch for fixing the ejection part partially protruded and inserted into the inner cap, and an outer cap for controlling the binding between the catch and the ejecting portion while slidingly sliding along the outer surface of the inner cap.

The outlet port is fixed to the inlet of the container to become a passage through the contents when the contents in the container are discharged out of the container or vice versa. In addition, the inner cap and the outer cap form a cap assembly that engages or separates from the outlet.

Specifically, the outlet includes an outlet body fixed to the container and an outlet portion formed at an end portion of the outlet body for discharging the contents, and the outlet body and the discharge portion are formed with holes for connecting the inside and the outside of the container.

The outer cap is mounted to be movable in the front-rear direction along the outer surface of the inner cap, and a locking hole is interposed between the outer cap and the inner cap. The inner cap, outer cap and catches form one cap assembly.

The catch is partially protruded from the inner surface of the inner cap and engaged with the discharge portion inserted into the inner cap. That is, when the cap assembly is pushed toward the outlet side so that the discharge part is inserted into the inlet of the inner cap, the discharge part passes while riding on the inclined surface of the catch which protrudes from the inner cap inner side, and the groove formed in the discharge part and the catch hole are bound to each other to pass the cap. The assembly is secured to the outlet. At this time, since the outer cap supports the outer surface of the locking hole, the locking hole and the discharge part can be firmly held.

To remove the cap assembly from the outlet, the user grabs and pulls the outer cap. Since the outer cap cannot retract and cannot support the outer surface of the catch, the catch can move outward and the binding force between the catch and the discharge portion is weakened so that the outer cap and the inner cap are separated from the outlet together.

The bottle cap according to the present invention does not need to use a separate tool to open the bottle cap, and can be reused because it can be closed with a bottle cap even after opening. In addition, since the bottle cap can be opened and closed by simply pushing and pulling without turning the bottle cap, the bottle cap is easy to use, and the bottle cap can be easily removed even with a small force enough to retract the outer cap.

The container herein can be used for the storage of articles such as liquids or powders and is independent of the shape of the container, and the bottle cap according to the present invention can be used regardless of the container material such as plastic bottles, glass bottles or metal cans. The cap may itself be made of various materials.

In addition, according to a preferred embodiment of the present invention in order to achieve the above objects, the container is formed in the inlet of the container body, the container body and the outlet including a groove formed around the discharge portion, the inner cap for covering and sealing the discharge portion And a locking hole which is partially protruded from the inner cap inner surface and engaged with the groove of the discharge portion inserted into the inner cap, and an outer cap for controlling engagement between the locking hole and the groove while slidingly sliding along the outer surface of the inner cap.

The bottle cap and the container body form an integral part, and the cap assembly consisting of the inner cap, the outer cap, and the locking hole can be easily opened and closed while being easily detached from the outlet. The outer cap and the inner cap move forward together to seal the discharge part, and as the outer cap retracts to release the catch, the binding force between the catch and the groove is weakened, and the inner cap and the outer cap are separated from the outlet.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments.

Example 1

Figure 2 is a perspective view for explaining the cap and the container according to the first embodiment of the present invention, Figure 3 is an exploded perspective view of the bottle cap and the container according to the first embodiment.

2 and 3, the bottle cap 100 according to the first embodiment includes an outlet 110, an inner cap 130, a latch 140, an outer cap 150, and a spring 160. .

The outlet 110 includes the outlet body 115 and the discharge unit 120, is formed integrally with the container 10 at the inlet of the container (10). Holes are formed in the centers of the outlet body 115 and the discharge part 120 to connect the inside and the outside of the container 10. The discharge part 120 is formed to protrude in the center of the upper end of the outlet body 115, the groove 122 is formed along the periphery of the discharge part 120. In addition, an O-ring 124 is provided between the inlet of the discharge portion 120 and the groove 122, and the O-ring 124 discharge portion when the discharge portion 120 is inserted into the inner cap 130. The outer surface of the 120 and the inner surface of the inner cap 130 are sealed. O-ring 124 may be composed of a rubber or soft synthetic resin material, preferably made of a transparent material to make the user feel psychologically comfortable when drinking a drink.

4 is a partial cross-sectional view of the inner cap according to the first embodiment, and FIG. 5A is a perspective view of the locking mechanism according to the first embodiment.

2 to 5A, the inner cap 130 is formed in a cylindrical shape corresponding to the discharge part 120 and covers and seals the discharge part 120. The discharge part 120 of the discharge port 110 may be inserted into the inner cap 130. Here, the packing formed inside the inner cap 130 seals the inlet of the discharge portion 120 primarily, and the O-ring 124 of the discharge portion 120 is the discharge portion 120 and the inner cap 130. By secondary sealing between the two), the double sealing and the bottle cap 100 can provide an excellent sealing effect.

The upper end of the inner cap 130 has a flange portion 132 is formed so as to correspond to the inner diameter of the outer cap 150. The bottom surface of the flange portion 132 supports one end of the spring 160, while the label portion 134 may be attached to the upper surface of the flange portion 132, so as to display the trademark and other information of the product stored in the container 10. I can display it.

According to another embodiment of the present invention, the trademark and other information may be directly displayed on the upper surface of the flange portion 132 without using the label portion 134, and the outer cap directly covers one end of the inner cap to display the trademark. You can do it.

Three holes 140 are formed in the inner cap 130 to correspond to the grooves 122 of the discharge part 120, and the locking holes 140 are provided adjacent to the holes 140. One end 142 of the catch 140 is integrally connected and fixed to the inner cap 130, and the other end 144 protrudes from the inner surface of the inner cap 130 while providing an inclined surface. In addition, the support portion 146 is formed adjacent to the connection portion of the one end 142 and the other end 144 to prevent the latch 140 from falling into the inner space of the inner cap 130.

Specifically, one end 142 and the other end 144 of the catch 140 is formed integrally with an acute angle, and the other end 144 when the catch 140 is mounted to the inner cap 130. Provides an inclined surface that slopes toward the inlet of the inner cap 130. Therefore, the discharge part 120 inserted into the inner cap 130 may easily enter the inclined surface, but once the catch 140 and the groove 122 are engaged, the discharge part 120 may be easily removed. It is not separated.

As shown, the locking mechanism 140 is manufactured integrally with the inner cap 130, but according to another embodiment of the present invention, the inner cap and the locking mouth may be separately molded and assembled.

5B is a perspective view of another locking mechanism that can be applied to the inner cap according to the first embodiment.

Referring to FIG. 5B, one end 142a of the catch 140a is integrally connected to the inner cap 130, and the other end 144a protrudes from the inner surface of the inner cap 130 while providing an inclined surface. Unlike the latch 140 of FIG. 5A, the latch 140a of FIG. 5B does not form an empty space between both ends 142a and 144a to form a relatively rigid body.

In addition, the discharge portion 120 inserted into the inner cap 130 can easily enter the inclined surface of the locking hole (140a), and once the locking hole (140a) and the groove 122 is bound easily The discharge part 120 is not separated.

6 is a bottom view of the outer cap according to the first embodiment, and FIG. 7 is a cross-sectional view of the outer cap according to the first embodiment.

2 to 7, the outer cap 150 is cylindrical to accommodate the inner cap 130, and the upper and lower ends thereof are opened. The inner surface of the outer cap 150 to a height that can be supported in close contact with the outer surface of the latch 140 is supported by the latch support 152 for supporting the outer surface of the latch 140 fixed to the inner cap 130. Formed. Each latch support 152 is formed at about 120 degree intervals. Hanger support portion 152 may support the spring 160 to the top, the outer cap 150 is formed to a length that can release the support for the hanger 140 when the retracting from the outlet (110). .

The catching jaw 156 is formed at the same height and the same position as the catching support 152 between the catching support 152, and the catching piece 154 is integrally formed at the lower end of the catching jaw 156. The locking pieces 154 are formed in one or two or more numbers on each locking jaw 156, are inclined at a predetermined angle toward the center, and are integrally formed downward.

The catching jaw 156 supports the other end of the spring 160 together with the catch supporter 152, which corresponds to the flange portion 132 of the inner cap 130 supporting one end of the spring 160. do. Thus, a repulsion occurs between the inner cap 130 and the outer cap 150.

The catching piece 154 is formed at the bottom of the catching jaw 156 and corresponds to the protrusion 138 located at the bottom of the inner cap 130. Thus, when the inner cap 130 enters from the top opening of the outer cap 150 to assemble the cap assembly, the lower end of the inner cap 130 is engaged with the protrusion 138 while passing through the end of the catch piece 154. Pieces 154 are bound together. Therefore, even when the repulsive force is acted by the spring 160, the outer cap 150 is retained by forming the inner cap 130 and the cap assembly by the engaging piece 154. In addition, since both ends of the locking piece 154 are limited by the latch receiving part 136 for accommodating the locking hole 140, the inner cap 130 is prevented from relatively rotating inside the outer cap 150. can do. Although three locking pieces 154 are formed at equal intervals in each locking step 156 in the present embodiment, the locking pieces may be integrally formed as one, and the intervals of the locking pieces may be variously adjusted.

8 to 10 are cross-sectional views for explaining the opening and closing process of the cap according to the first embodiment.

Referring to FIG. 8, a cap assembly including an inner cap 130, a catching hole 140, and an outer cap 150 is attached to the outlet 110. It is not necessary to temporarily retract the outer cap 150 to bind the cap assembly to the outlet 110, and push the cap assembly over the outlet 110 in the state shown.

As the inner cap 130 is advanced toward the discharge port 110, the discharge part 120 passes on the inclined surface of the locking hole 140, and the locking hole 140 and the groove 122 are fixed to each other. The inner cap 130 and the discharge portion 120 are sealed by an O-ring 124 and a packing 139.

In addition, a spring 160 is provided between the flange portion 132 of the inner cap 130 and the locking projection 156 of the outer cap 150. The spring 160 is a compression spring and creates a repulsive force between the inner and outer caps 130, 150.

Referring to FIG. 9, the outer cap 150 is pulled upward to separate the cap assembly from the outlet 110. While the outer cap 150 is retracted, the inner cap 130 stays in a fixed position, and the latch support 152 also slides upward by the relative movement of the outer cap 150. By the movement of the catch supporter 152, the catch 140 loses the support force from the outer surface and pushes slightly toward the outer surface, thereby weakening the binding force between the catch 140 and the groove 122.

Referring to FIG. 10, as the outer cap 150 continues to retreat, the inner cap 130 is also separated from the discharge portion 120 and moved together with the outer cap 150, thereby separating the cap assembly from the outlet 110. Bottle cap 100 is opened.

The inner cap 130 is restored to its original position by the restoring force of the spring 160, and the engaging piece 154 and the protrusion 138 prevent the mutual movement to maintain the coupling relationship.

If the cap assembly is to be sealed again with the cap assembly, the cap assembly only needs to be pushed toward the outlet 110.

Example 2

11 is an exploded perspective view of the cap according to the second embodiment of the present invention, Figure 12 is a side cross-sectional view of the bottle cap according to the second embodiment.

The bottle cap according to the second embodiment has a structure that can be selectively mounted and detached at a conventional bottle inlet. Thus, the cap of the second embodiment has a structure and function substantially the same as the components of the cap 100 of the first embodiment in addition to the coupling structure of the outlet body 115a. Therefore, the description of the second embodiment may refer to the description and the drawings of the first embodiment, and repeated content may be omitted.

11 and 12, the bottle cap according to the second embodiment includes an outlet 110a, an inner cap 130, a catch 140, an outer cap 150, and a spring 160. The outer cap 150 is slidably mounted on the outer surface of the inner cap 130 to form a cap assembly, and the catch 140 provided in the inner cap 130 is engaged with the groove of the discharge part 120 so that the cap The assembly is secured to the outlet 110.

The outlet 110a includes an outlet body 115a and a discharge part 120, and a female screw part 117 is formed inside the outlet body 115a. The female screw portion 117 corresponds to the male screw portion 22 formed at the inlet of the bottle 20, and the outlet 110a and the bottle 20 are inserted by turning the outlet 110a into the inlet of the bottle 20. Can bind. A packing is formed in the outlet body 110a to correspond to the inlet of the bottle 20, and when the outlet body 110a and the bottle 20 are bound, the contents can be prevented from leaking.

In general, in the case of PET bottles, a bottle cap that can be separated by standardizing the inlet size of the bottle and the like can be used in other bottles, and can be sold as a product only by the bottle cap itself.

Example 3

13 is a side view for explaining a container according to a third embodiment of the present invention. The container according to the third embodiment is characterized in that the cap assembly consisting of the inner cap, the outer cap and the catch in the previous embodiment is mounted directly to the inlet of the container. The container of the third embodiment has substantially the same structure and function as the cap and container of the first embodiment except for the position of the cap assembly and the structure of the insertion cap 210.

Accordingly, the description of the third embodiment may refer to the description and the drawings of the first embodiment, and repeated content may be omitted.

Referring to FIG. 13, the container according to the third embodiment includes an insertion cap 210, an inner cap 230, a latch, an outer cap 250, and a spring 260.

The inner cap 230 is integrally formed with the container 30. Three holes are formed in the inner cap 230 to correspond to the grooves of the inserting part 220, and a locking hole is integrally formed with the inner cap 230 adjacent to the hole. One end of the catch is integrally connected and fixed to the inner cap 230, and the other end protrudes from the inner surface of the inner cap 230 while providing an inclined surface. Therefore, the insertion part 220 inserted into the inner cap 230 may easily enter the inclined surface, but once the locking hole 240 and the groove are engaged, the insertion cap 210 and the insertion part 220 may be used. ) Is not easily separated.

Insertion cap 210 includes an insertion portion 220 is inserted into the discharge portion of the inner cap 230, the upper end of the insertion cap 210 is a handle 212 for easily holding the insertion cap 210 is Is formed.

As already mentioned, grooves are formed along the perimeter of the insert 220. In addition, an O-ring may be provided between the inlet of the inner cap 230 and the groove of the insert 220 to seal the container 30.

In order to seal the container 30, the insertion portion 220 of the insertion cap 210 is inserted into the discharge portion of the inner cap 230. At this time, while the insertion unit 220 advances toward the inner cap 230, the insertion unit 220 passes through the inclined surface of the locking hole, and the locking hole and the groove are fixed to each other.

The outer cap 250 is pulled downward to separate the insertion cap 210 from the discharge portion. While the outer cap 250 moves downward, the inner cap 230 remains in a fixed position, and the latch support also slides upward by the relative movement of the outer cap 250.

The binding force of the locking mechanism and the groove becomes weak due to the movement of the locking support, and the user may pull the insertion cap 210 to separate it. In order to seal again it is only necessary to push the insertion cap 210 into the inner cap 230.

The bottle cap according to the present invention can easily open and close the bottle, and anyone can easily close the bottle cap regardless of the strength of the force and can open the bottle cap without giving excessive force.

In addition, the bottle cap can be reused, and the bottle can be opened and closed repeatedly.

In addition, the container including the bottle cap can easily open and close the container, can be effectively bound and separated without applying excessive force, can be repeatedly reused.

As described above, the present invention has been described with reference to a preferred embodiment of the present invention, but those skilled in the art various modifications and changes of the present invention without departing from the spirit and scope of the present invention described in the claims below I can understand that you can.

Claims (27)

A discharge port formed at an inlet of the container and including a groove formed around the discharge part; An inner cap for covering and sealing the discharge portion; A locking hole mounted to the inner cap and partially protruding from the inner cap inner surface to secure the discharge portion inserted into the inner cap and binding to the groove; And And an outer cap configured to selectively support the outer surface of the locking hole while slidingly sliding along the outer surface of the inner cap to control engagement between the locking hole and the groove. The inner cap and the outer cap together advance toward the outlet to cover and seal the discharge portion, and the inner cap and the outer cap are separated from the outlet by releasing the catch as the outer cap retreats. Bottle cap. The method of claim 1, A hole is formed in the wall of the inner cap corresponding to the position of the groove of the discharge portion, and the locking hole is partially protruded from the inner surface of the inner cap through the hole. The method of claim 1, The stopper is a bottle cap, characterized in that formed integrally with the inner cap. The method of claim 1, The groove is formed along the periphery of the discharge portion, the bottle cap, characterized in that the O-ring is formed between the groove and the discharge portion inlet for sealing. The method of claim 4, wherein The O-ring is a bottle cap, characterized in that formed of a rubber of a transparent material. The method of claim 1, Bottle cap, characterized in that the inner surface of the outer cap protruding the latch support for supporting the latch. The method of claim 6, A spring interposed between the outer cap and the inner cap to provide a mutual pushing force, the upper end of the inner cap is formed with a flange for supporting one end of the spring, the opposite to the flange Bottle cap, characterized in that the locking jaw for supporting the other end of the spring to the upper end between the latch support portion protruding from the inner surface of the outer cap. The method of claim 7, wherein Bottle cap, characterized in that the locking piece is formed on the lower end of the locking jaw to engage with the protrusion formed on the lower inner cap. The method of claim 1, The cap partially protruding from the inner cap inner surface at the catching hole forms an inclined surface facing the inlet of the inner cap. The method of claim 9, One end of the stopper is fixed to the outer surface of the inner cap, the other end is a cap cap characterized in that it comprises a locking piece to form an inclined surface toward the inlet of the inner cap. The method of claim 1, The outlet includes an outlet body fixed to the inlet of the container and the discharge part connected to the outlet body, the outlet body is formed in the outlet body corresponding to the male thread formed in the inlet of the container, the body of the outlet is a screw Bottle cap, characterized in that mounted on the container by coupling. Container body; A discharge port formed at an inlet of the container body and including a groove formed around the discharge part; An inner cap for covering and sealing the discharge portion; A locking hole mounted to the inner cap and partially protruding from the inner cap inner surface to secure the discharge portion inserted into the inner cap and binding to the groove; And And an outer cap configured to selectively support the outer surface of the locking hole while slidingly sliding along the outer surface of the inner cap to control engagement between the locking hole and the groove. The inner cap and the outer cap together advance toward the outlet to cover and seal the discharge portion, and the inner cap and the outer cap are separated from the outlet by releasing the catch as the outer cap retreats. Vessel. The method of claim 12, And a hole is formed in the wall of the inner cap corresponding to the position of the groove of the discharge portion, and the locking hole partially protrudes from the inner surface of the inner cap through the hole. The method of claim 12, The catch is characterized in that the container is formed integrally with the inner cap. The method of claim 12, And the groove is formed along the periphery of the discharge portion, and an O-ring is formed between the groove and the discharge portion inlet for sealing. The method of claim 12, And the groove is formed along a circumference of the discharge portion, and an O-ring is formed on an inner surface of the inner cap to seal between the groove and the discharge portion inlet. The method of claim 12, The inner surface of the outer cap container, characterized in that the latch support for projecting the latch is formed. The method of claim 17, A spring interposed between the outer cap and the inner cap to provide a mutual pushing force, the upper end of the inner cap is formed with a flange for supporting one end of the spring, the opposite to the flange A container, characterized in that the engaging projection for supporting the other end of the spring to the upper end between the latch support portion protruding from the inner surface of the outer cap. The method of claim 18, The lower end of the locking jaw container characterized in that the engaging piece for engaging with the protrusion formed on the lower inner cap. The method of claim 12, And a portion of the locking portion that protrudes from the inner cap inner surface forms an inclined surface facing the inlet of the inner cap. Container body; An inner cap formed at an inlet of the container body and forming a discharge portion; An insertion cap including an insertion portion inserted into the discharge portion to seal the discharge portion, and having a groove formed around the insertion portion; A locking hole mounted to the inner cap and partially protruding from the inner cap inner surface to secure the insertion portion inserted into the inner cap and binding to the groove; And And an outer cap configured to selectively support the outer surface of the locking hole while slidingly sliding along the outer surface of the inner cap to control engagement between the locking hole and the groove. And the insertion cap is inserted into the discharge portion to seal the discharge portion, and the outer cap is retracted downward to release the catch so that the insertion cap is separated from the discharge portion. The method of claim 21, And a hole is formed in the wall of the inner cap corresponding to the position of the groove of the insertion portion, and the catch is partially protruded from the inner surface of the inner cap through the hole. The method of claim 21, The catch is characterized in that the container is formed integrally with the inner cap. The method of claim 21, The inner surface of the outer cap container, characterized in that the latch support for projecting the latch is formed. The method of claim 24, A spring interposed between the outer cap and the inner cap to provide a mutual pushing force, the lower end of the inner cap is formed with a flange portion for supporting one end of the spring, the opposite to the flange portion A container, characterized in that the engaging projection for supporting the other end of the spring protruding from the inner surface of the outer cap between the latch support portion. The method of claim 25, Container at the upper end of the locking step is characterized in that the engaging piece for engaging with the protrusion formed on the upper end of the inner cap. The method of claim 21, And a portion of the locking portion that protrudes from the inner cap inner surface forms an inclined surface facing the inlet of the inner cap.