KR20040038453A - Lid assembly capable for opening and closing selectively and Vessel using the same - Google Patents

Abstract

PURPOSE: A selectively openable and closeable cover assembly and a container utilizing the same are provided to discharge the liquid in the container or seal the container by operating a press button. CONSTITUTION: The cover assembly includes: a cover plate(20) with a liquid discharge hole(310); a bracket(200) installed on the back surface of the cover plate(20); a rotating unit(100) rotatably coupled to the bracket(200); an elastic support(130) coupled to the rotating unit(100) so as to suppress the rotation of the rotating unit(100), one end pressing the back surface of the cover plate(20); a press button(400) selectively pressing or releasing one side of the rotating unit(100); and an on-off plug(300) opening and closing the liquid discharge hole(310) according to the operation of the press button(400).

Description

Lid assembly capable for opening and closing selectively and Vessel using the same}

The present invention relates to a cover assembly capable of selectively opening and closing and a container using the same, and more particularly, to a cover assembly and a container using the same can open and close the liquid outlet by a simple operation of pressing or releasing the pressing button.

Furthermore, the present invention relates to a cover assembly and a container to which the liquid can be safely discharged by a simple button operation even when the pressure inside thereof increases due to the evaporation of the liquid contained in the container.

In general, a container for drinking water or water consists of a container and a cover that is coupled to the container. Among them, the function of the cover is to prevent the liquid in the container from leaking to the outside, and at the same time, to facilitate the outflow when desired.

Therefore, most of the cover is formed with an outlet hole, a stopper for opening and closing the outlet hole is provided.

However, with the existing configuration, it is difficult to easily handle the plug to open and close the outlet hole, and it is difficult to ensure the sealing together with the opening and closing.

In addition, for example, when a liquid containing a kind of increase in the internal pressure by evaporation, such as carbonated drinks or hot water, it must be sufficiently resistant to internal pressure and easily opened and closed.

Accordingly, the present invention is proposed to solve these problems, and an object of the present invention is to provide a cover assembly and a container using the same, which can leak or seal the liquid contained in the container by simply operating a press button.

Another object of the present invention is to provide a cover assembly and a container employing the same, which can ensure the sealing and facilitate the opening and closing, even when the liquid containing the liquid to increase the internal pressure by evaporation.

1 is a perspective view showing a container to which the cover assembly of the present invention is applied.

2 is a perspective view of a cover assembly according to an embodiment of the present invention.

2A is a perspective view illustrating a coupling state of the opening and closing operation unit and the bracket of FIG. 2.

3 is an exploded view of the pressing button applied to the present invention.

Figure 3a is a combination of the pressing button.

4 is a cross-sectional view showing the type of opening and closing plug.

Figure 4a is a cross-sectional view illustrating the installation of the packing in the opening and closing plug.

5 is an explanatory view for explaining the operation of the cover assembly according to another embodiment of the present invention.

6 is an explanatory view for explaining the operation of the cover assembly according to another embodiment of the present invention.

7 is a perspective view of a cover assembly according to another embodiment of the present invention.

8 is a side view of FIG. 7.

It is sectional drawing explaining the structure of a pressure reduction hole.

10 is a perspective view illustrating a cover assembly according to another embodiment of the present invention.

11 is a partial perspective view showing a cover assembly according to another embodiment of the present invention.

According to the first embodiment of the present invention, the liquid discharge hole is formed cover plate; A bracket installed on the rear surface of the cover plate; A rotation unit rotatably coupled to the bracket; An elastic support coupled to the rotation unit so as to suppress the rotation of the rotation unit, one end of which presses the rear surface of the cover plate; A pressing button for selectively pressing or releasing one side of the rotating unit; And it is installed on the portion of the rotating unit coupled to the bracket is disclosed a cover assembly capable of selectively opening and closing including an opening and closing plug for opening and closing the liquid outflow hole in accordance with the operation of the pressing button.

Preferably, the bracket is U-shaped, the rotating unit is a T-shaped consisting of the pressure receiving portion in contact with the pressing button and the opening and closing operation portion formed integrally perpendicular to the pressure receiving portion projections protruding from both sides of the opening and closing operation portion bracket It is coupled to the coupling grooves formed on both side walls of the elastic support extends in the direction of the opening and closing operation portion on both sides of the pressure receiving portion.

Further, preferably, the bracket is U-shaped, the rotating unit is L-shaped consisting of a pressure receiving portion in contact with the pressing button and the opening and closing operation portion formed integrally perpendicular to the pressure receiving portion, projections protruding from both sides of the opening and closing operation portion. Is coupled to the coupling grooves formed on both sidewalls of the bracket, and the elastic support is formed integrally with the opening and closing operation part to extend between the bracket and the opening and closing operation part.

In addition, the opening and closing plug, for example, is located inside the liquid outlet, and when the pressing button presses one end of the rotation unit, the opening and closing plug moves outward to seal the liquid outlet.

Also, as another example, the opening and closing plug is located outside the liquid outlet, and when the pressing button presses one end of the rotation unit, the opening and closing plug moves outward to open the liquid outlet.

Preferably, the opening and closing plug is formed with a groove along the side, the groove is inserted into the packing so as to protrude, or coated with an elastic material.

According to the second embodiment of the present invention, the liquid discharge hole and the pressure reducing hole formed to be spaced apart from each other; A pair of first and second brackets installed on the rear surface of the cover plate; A rotation unit rotatably coupled to the first and second brackets; An elastic support coupled to the rotation unit to suppress rotation of the rotation unit, one end of which presses a rear surface of the cover plate; A pressing button for selectively pressing or releasing one side of the rotating unit; An opening and closing plug installed on a portion of the rotation unit coupled to the first bracket; And a decompression plug installed at a portion of the rotation unit coupled to the second bracket, wherein the opening and closing plug and the decompression plug are located at the rear side of the cover plate, and the decompression hole and the liquid discharge hole are spaced at regular intervals according to the release of the pressing button. Disclosed is a cover assembly capable of selectively opening and closing sequentially.

Preferably, the rotation unit is composed of a pressure receiving portion in contact with the pressure button and the pressure-reducing portion coupled to the opening and closing operation unit and the pressure receiving unit integrally formed perpendicularly to the pressure receiving portion, the decompression operation portion is formed on the side of the pressure receiving portion Removably coupled to the groove.

More preferably, the width of the coupling groove is formed larger than the thickness of the decompression operation portion.

In addition, the bracket is U-shaped, the opening and closing operation portion and the decompression operation portion is rotated by engaging the engaging grooves formed on both side walls of the bracket projections protruding from each side.

Preferably, the elastic support is formed by protruding from the opening and closing operation part to the first elastic support extending between the first bracket and the opening and closing operation part and the second elastic support extending from the decompression operation part and extending between the second bracket and the decompression operation part. Is done.

Preferably, the depth at which the pressure reducing plug is inserted into the pressure reducing hole is shallower than the depth at which the opening and closing plug is inserted into the liquid outlet hole.

In addition, the pressure reducing hole is formed with a step so that the back side of the cover plate is enlarged, and the pressure reducing plug is in line contact with the edge of the step to seal the pressure reducing hole.

Preferably, the pressure reducing plug is hemispherical or ellipsoidal.

According to the present invention, the pressing button is connected to both ends and a flange is formed at one end is fixed through the cover plate, a plurality of locking jaws and slide grooves are sequentially formed on the inner wall, the guide block is formed on the inner bottom step; A slider having a cap having a cylindrical shape with one end closed, teeth formed at a periphery of the other end, and having a spring housed therein, accommodated inside the guide block, slidable along a slide groove, and coupled to be caught by a step; One end is accommodated in the slider is rotated by the teeth with respect to the linear movement of the slider, and in response to the rotation includes a pressing piece that is caught in the engaging groove of the guide block or slides along the slide groove.

Preferably, an o-ring is installed between the flange back side of the guide block and the cover plate and between the stepped portion of the guide block and the slider.

According to a third embodiment of the present invention, there is disclosed a container capable of selectively opening and closing comprising a cover assembly of the first or second embodiment and a container associated with the cover assembly.

Preferably, the cover assembly and the container can be screwed together.

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

1 is a perspective view showing a container applying the cover assembly of the present invention, Figure 2 is a perspective view of a cover assembly according to an embodiment of the present invention, Figure 3 is an exploded view of the pressing button applied to the present invention, Figure 3a Combination of the press button.

As shown in FIG. 1, the container 10 has a form in which the cover 20 and the container 30 are coupled to each other. The cover 20 and the container 30 may, for example, be screwed together or integrally formed if necessary.

The cover 20 is exposed to the opening and closing plug 300 and the pressing button 400, the opening and closing plug 300 is opened or closed in accordance with the operation of the pressing button 400, as will be described later, of the cover 20 It can operate on the outside or on the inside.

According to the present invention, the pressing button 400 sequentially pressurizes or releases an object every time it pressurizes, and in particular, has a structure in which the pressure inside the container 10 does not leak, which will be described later.

Referring to FIG. 2, for convenience of description, the cover 20 is illustrated in a plate shape having a skirt formed along a periphery thereof, hereinafter referred to as a cover plate. In addition, the cover plate 20 is indicated by a dotted line to indicate that the cover assembly is installed on the rear surface of the cover plate 20. The cover plate 20 is formed with a liquid outlet hole 310 through which the liquid in the container 10 flows out.

The bracket 200 is installed on the rear surface of the cover plate 20. For example, the bracket 200 has a “c” shape and coupling grooves are formed at both sidewalls. That is, as shown in Figure 2a, the coupling grooves 202 are formed on both side walls, the protrusions 122 formed on both sides of the opening and closing operation portion 120 of the rotation unit 100 is rotatably coupled. do. The bracket 200 may be integrally injection molded or separately manufactured and coupled to the rear surface of the cover plate 20. When fabricated integrally, only the sidewalls may protrude from the rear surface, thereby simplifying the structure.

The rotation unit 100 is, for example, a T-shaped pressure receiving unit 110 and the opening and closing operation unit 120 is integrally formed. The pressure receiving unit 110 is in contact with the pressing button 400, the opening and closing operation unit 120 is rotatably coupled to the bracket 200, as described above, protrudes from both sides of the opening and closing operation unit 120 The protrusion 122 is fitted into the coupling groove 202 formed on both sidewalls of the bracket 200. Therefore, when pressure is applied from the pressure button 400 and the pressure receiving unit 110 receives the displacement and causes the displacement, the opening and closing operation unit 120 rotates around the bracket 200 to displace the opening and closing plug 300. The liquid outlet hole 310 is opened or closed.

In addition, the pair of elastic supports 130 integrally formed on both sides of the pressure receiving unit 110 is elastically in contact with the back surface of the cover plate 20 to force the rotation unit 100 by the pressing button 400. Even if it is displaced, force elastic force to return to win position.

Rotating unit 100 has to receive the pressure in a vertical state with respect to the pressing button 400, when the pressing button 400 is inclined due to the installation space problem, the rotating unit to receive the pressure vertically from the pressing button 400. You must change (100). Referring to FIG. 2, both ends of the pressure receiving portion 110 of the rotation unit 100 are bent in a V-shape so that the bent portion 112 contacts the rear surface of the cover plate 20 and the inclined portion 113. Is in contact with the pressing button 400, the inclination angle of the inclination portion 113 is determined to achieve a state perpendicular to the pressing button 400.

The rotation unit 100 may be manufactured using a resin material, such as polypropylene, in consideration of production convenience and production cost. In addition, the elastic support 130 may be made of a metal material in order to increase the elastic force is coupled to the rotation unit 100 or integrally formed in the rotation unit.

Opening and closing plug 300 is coupled to the end of the opening and closing operation unit 120 of the rotation unit 100 via a stem (stem; 320), for convenience of description, including the opening and closing plug 320. Referring to FIG. 4, the opening and closing plug 300 includes a core 301 and an elastic membrane 302 such as silicon coated on an outer surface of the core 301, and the cover plate 20 by the elastic membrane 302. Clearance can be ensured by removing the gap between

As shown in FIG. 4, the opening and closing plug 300 has an inverted trapezoidal cross section when it is outside the cover plate 20, and has a trapezoidal cross section when it is inside. Therefore, the cross-sectional shape of the liquid outlet hole 310 formed in the cover plate 20 is also formed corresponding to the cross-section of the opening and closing plug 300.

In addition, referring to FIG. 4A, without forming an elastic membrane on the opening and closing plug 300, a groove 304 is formed along the side surface of the opening and closing plug 300, and a packing such as a silicon material is formed on the groove 304. By inserting the 306 to protrude slightly, the packing 306 may be brought into close contact with the sidewall of the liquid outlet hole 310 to remove the gap.

Referring to FIG. 3, the pressing button 400 applied to the present invention includes a guide block 450, a slider 410, and a pressing piece 430.

The guide block 450 has a flange 452 formed at one end of the guide block 450 so as to open at both ends thereof and is fixed through the cover plate 20, and a plurality of locking jaws ( The 455 and the slide grooves 456 are sequentially formed, and the stepped portion 453 is formed at an inner lower end thereof. Preferably, referring to FIG. 3A, an O-ring 458 is interposed between the rear surface of the flange 452 and the cover plate 20 to remove a gap to prevent the liquid from flowing out. . The guide block 450 is manufactured separately and fitted to the cover plate 20 to be fixed or formed on the cover plate 20 using the cover plate 20 as a body without separately manufacturing the body 451 of the guide block 450. A plurality of locking jaws 455, slide grooves 456, and step 453 may be directly formed in the through hole.

The slider 410 has a cylindrical shape, and a cap 420 is coupled to one end of the body 412, and teeth 414 are formed at the periphery of the other end, and a spring 415 is accommodated therein, and the guide block 450 is located inside the slider 410. Is accommodated in the slide slidable along the groove 456 and the locking step 413 is formed to be caught on the step 453. Preferably, referring to FIG. 3A, an O-ring 454 is interposed in a portion of the stepped portion 453 in contact with the body 412 of the slider 410 to remove the gap, thereby allowing the liquid to flow out. prevent.

The pressing piece 430 includes a cylindrical body 431 having a stepped shape formed at one end thereof, a guide protrusion 32 formed along the side of the body at one end, and a pressing part 433 formed at the end surface. Preferably, the pressing portion 433 is formed in a hemispherical shape to facilitate pressing the rotating unit.

An operation of the cover assembly having such a configuration will be described below with reference to FIG. 5. For convenience of explanation, it is assumed that the cover plate 20 is coupled to the cover plate 20 in a screw manner in a state where the beverage is contained in the container 30.

As shown in FIG. 5A, in the state of storing the beverage, the pressing button 400 is in a released state, and the pressure accommodating part 110 is pulled by the elastic force of the elastic support 130, and the pressure accommodating part 110 is provided. The opening and closing operation unit 120 connected to the) rotates around the bracket 200, and thus the opening and closing plug 300 installed in the opening and closing operation unit 120 seals the liquid outlet hole 310.

Pressing the cap 420 of the pressing button 400 to drink the beverage, the slider 420 coupled with the cap 420 moves along the slide groove 456 of the guide block 450 to move the pressing piece 430 As a result, the pressing portion 433 of the pressing piece 430 presses the pressure receiving portion 110 of the rotation unit 100.

At this time, the pressure piece 430 is rotated by the interaction between the teeth 414 of the slider 410 and the guide protrusion 432 of the pressure piece 430 to face the locking step 455 of the guide block 450. To be located. Therefore, even if the pressure applied to the pressing button 400 is removed, since the guide protrusion 432 of the pressing piece 430 is caught by the locking jaw 455 of the guide block 450 and can no longer be moved, the pressing piece 430. Is in a pressurized state of the rotation unit (100).

Preferably, the spring 415 installed in the slider 410 is urged by the restoring force to pressurize the pressing piece 430 and the slider 410 in opposite directions, so that the pressing piece 430 may move the rotating unit 100. The slider 410 is free to move in a pressurized state to prevent the occurrence of gaps.

Referring to Figure 5b, the pressure is applied in the direction of the arrow A by the pressing button 400, the pressure receiving unit 110 of the rotation unit moves in the direction of the arrow A, accordingly, the opening and closing operation unit 120 is bracket 200 Rotate around the center to lift the opening and closing plug 300.

Therefore, the beverage inside is discharged into the gap between the cover plate 20 and the opening and closing plug 300, as indicated by the arrow B.

On the other hand, referring to Figure 6 in another embodiment, the opening and closing plug 300 is located on the back side of the cover plate 20 is moved upward to close the liquid outlet 310. That is, the pressure is normally applied by the pressing button 400, the opening and closing plug 300 is blocked by the rotation unit 100, the liquid outlet 310, and when the pressure of the pressing button 400 is released, elastic The liquid outlet 310 is opened by the restoring force of the support 130.

As such, the structure of closing the liquid outlet 310 from the inside of the cover plate 20 is advantageously applied when the target liquid having a high vapor pressure is contained in the container 10 by evaporation such as hot water or a carbonated beverage. That is, even if the opening and closing plug 300 is moved from the inner side to the outer side due to the generated steam pressure, it acts as a factor for better sealing.

7 is a perspective view showing a cover assembly according to another embodiment of the present invention, Figure 8 is a side view.

Referring to FIG. 7, the difference from the embodiment of FIG. 2 is that the opening and closing plug 300 is located on the rear side of the cover plate 20 and applies a pressure reduction structure.

The pressure reducing hole 340 is formed through the cover plate 20 so as to face the liquid outlet hole 310, and the pressure reducing unit 140 extends in the opposite direction to the opening and closing operation unit 120 of the rotation unit 100. , Is rotatably coupled to the bracket 250 installed on the rear surface of the cover plate 20. The bracket 250 has the same structure as the bracket 200 of FIG. 2 and is coupled in the same manner as the decompression unit 140. A pressure reducing plug 350 is installed at an end of the pressure reducing operation unit 140 to open and close the pressure reducing hole 340 according to the operation of the pressure reducing operation 140.

An operation of the cover assembly according to another embodiment will be described with reference to FIG. 8.

The opening and closing plug 300 is located on the rear surface side of the cover plate 20 to move upward to close the liquid outlet 310. In general, pressure is applied by the pressing button 400 to the rotation unit 100. The opening and closing plug 300 blocks the liquid outlet 310, and the pressure reducing plug 350 connected to the pressure reducing operation unit 140 blocks the pressure reducing hole 340 in the same manner.

When the pressure of the pressing button 400 is released, the liquid outlet 310 and the decompression hole 340 are opened by the restoring force of the elastic support 130.

At this time, preferably, the stepped portion 342 is formed inside the decompression hole 340 to have an extended back surface of the cover plate 20. Therefore, since the pressure reducing plug 350 contacts the edge of the step 342 and closes the pressure reducing hole 340, the pressure reducing plug 350 opens the pressure reducing hole 340 even by the minute displacement of the pressure reducing plug 350.

The pressure reducing plug 350 may be manufactured in a hemispherical shape or an elliptic hemispherical shape, and may be made of a material such as silicon in order to improve sealing force.

As a result, when the pressure applied from the pressing button 400 is released, the pressure receiving unit 110 is displaced by the restoring force of the elastic support 130, and correspondingly, the opening and closing operation unit 120 and the decompression operation unit 140 ) Causes displacement at the same time. At this time, as described above, since the decompression plug 350 connected to the decompression operation unit 140 closes the decompression hole 340 by line contact by the step 342, the liquid outflow hole may be caused by the displacement of the opening and closing plug 300. The pressure reducing hole 340 may be first opened by the displacement of the pressure reducing plug 350 while the 310 is not yet open. As a result, the decompression hole 340 and the liquid outlet hole 310 are sequentially opened with a certain time difference.

In order to open and close sequentially without forming a step in the decompression hole 340, the depth in which the decompression plug 350 is inserted into the decompression hole 340 is the depth in which the opening and closing plug 300 is inserted into the liquid outlet hole 310. It is also possible to make it smaller.

Accordingly, since the vapor or gas filled in the container 10 is discharged first, for example, hot liquid may be scattered to the liquid outlet 310 to prevent a user from being burned.

9 is a perspective view showing a cover assembly according to another embodiment of the present invention.

The rotation unit 100 has an L-shape in order to simplify the structure, the pressure receiving unit 110 and the opening and closing operation unit 120 is integrally formed. The pressure accommodating part 110 is in vertical contact with the pressing button 400, and the opening and closing operation part 120 is rotatably coupled to the bracket 200.

The elastic support 130 protrudes from the boundary between the pressure accommodating part 110 and the opening and closing operation part 120 to extend in the direction of the opening and closing operation part 120. At this time, the elastic support 130 extends between the bracket 200 and the opening and closing operation 120.

According to this embodiment, the structure is simplified by configuring the L-shape, in particular, the elastic support 130 starts at the boundary between the pressure receiving unit 110 and the opening and closing operation unit 120, opening and closing with the bracket 200 By extending through the operation unit 120 there is an advantage that can reduce the size of the elastic support 130 while maximizing the elastic force.

11 is a partial perspective view showing a cover assembly according to another embodiment of the present invention.

A second elastic support 130a is formed in the decompression unit 140 and extends between the bracket 250 and the retracting unit 140. Preferably, the decompression operation unit 140 may be detachably coupled to the pressure receiving unit 110, for this purpose, a coupling groove 115 is formed on the side of the pressure receiving unit 110, the decompression operation unit 140 ) Is inserted here. More preferably, the chamfer 142 is formed at both corners of one side of the decompression operation unit 140 to prevent the flow back and forth after the insertion. In addition, when the pressure receiving unit 110 receives the pressure of the pressure button 400 to cause displacement by increasing the width Ta of the coupling groove 115 to be slightly larger than the thickness Tb of the pressure reducing operation unit 140. Therefore, there is an advantage in that this displacement can be flexibly transmitted.

Although the above has been described with reference to the preferred embodiments of the present invention, various modifications are possible at the level of those skilled in the art.

For example, in the above embodiment, the elastic support is installed in pairs, but when the internal pressure due to evaporation from the liquid is large, a larger elastic force may be required to overcome this and open the plug. There can be installed a larger number of elastic support or use a large elastic metal material.

In addition, in consideration of the health of the user, it is possible to select a material such as an elastic membrane or a rotation unit and a bracket formed on the opening and closing plug.

As such, the scope of the present invention should not be limited to the above embodiments, but should be determined by the scope of the rights described below.

As described above, the present invention has many advantages.

In other words, by simply operating the pressing button, it is possible to leak or seal the beverage contained in the container, which is advantageous in that the operation is convenient. In particular, when driving a car or the like, it is convenient because a drink can be used to drink.

In addition, even when the object to increase the internal pressure by evaporation, etc., the internal pressure is reduced first, and then the object may flow out, thereby ensuring the safety of use.

Moreover, there is an advantage that the tighter the pressure inside the container by sealing the liquid outlet hole from the inside of the container, the better the sealing.

In addition, there is an advantage that can prevent the leakage of the liquid through the pressing button by applying an o-ring or the like in the guide block of the pressing button.

Claims (19)

A cover plate having a liquid outlet hole formed therein; A bracket installed on a rear surface of the cover plate; A rotation unit rotatably coupled to the bracket; An elastic support coupled to the rotation unit so as to suppress rotation of the rotation unit, and one end of which presses the rear surface of the cover plate; A pressing button for selectively pressing or releasing one side of the rotating unit; And And an opening and closing plug installed on a portion of the rotation unit coupled to the bracket to open and close the liquid outlet hole according to the operation of the pressing button. According to claim 1, wherein the bracket is U-shaped, the rotating unit is a T-shape consisting of a pressure receiving portion in contact with the pressing button and the opening and closing operation portion formed integrally perpendicular to the pressure receiving portion and the opening and closing operation portion Protrusions protruding from both sides is coupled to the coupling groove formed on both side walls of the bracket, the cover support, characterized in that the elastic support extends in the direction of the opening and closing operation portion on both sides of the pressure receiving portion. The method of claim 1, wherein the bracket is U-shaped, the rotation unit is L-shaped consisting of a pressure receiving portion in contact with the pressing button and the opening and closing operation unit formed integrally perpendicular to the pressure receiving portion, the opening and closing operation portion Projections protruding from both sides are coupled to coupling grooves formed on both sidewalls of the bracket, and the elastic support is formed integrally with the opening and closing operation part to extend between the bracket and the opening and closing operation part. Cover assembly available. The method of claim 1, wherein the opening and closing plug is located inside the liquid outlet, and when the pressing button presses one end of the rotation unit, the opening and closing plug moves outward to seal the liquid outlet. Cover assembly for optional opening and closing. The method of claim 1, wherein the opening and closing plug is located outside the liquid outlet, and when the pressing button presses one end of the rotation unit, the opening and closing plug moves outward to open the liquid outlet. Cover assembly that can be opened and closed automatically. The cover assembly of claim 1, wherein the opening and closing plug has a groove formed along a side surface thereof, and a groove is inserted in the groove so that a packing may protrude from the groove. The cover assembly of claim 1, wherein the opening and closing plug is coated with an elastic material. A cover plate having liquid discharge holes and pressure reducing holes spaced apart from each other; A pair of first and second brackets installed on a rear surface of the cover plate; A rotation unit rotatably coupled to the first and second brackets; An elastic support coupled to the rotation unit to suppress rotation of the rotation unit and having one end pressurizing a rear surface of the cover plate; A pressing button for selectively pressing or releasing one side of the rotating unit; An opening and closing plug installed on a portion of the rotation unit coupled to the first bracket; And It includes a decompression plug is installed on the portion of the rotating unit coupled to the second bracket, The opening and closing plug and the decompression plug is located on the back side of the cover plate, the cover assembly capable of selectively opening and closing, characterized in that to open the decompression hole and the liquid outlet hole in sequence at regular intervals according to the release of the pressing button. According to claim 8, wherein the rotation unit is composed of a pressure receiving portion in contact with the pressure button and the opening and closing operation unit formed integrally perpendicular to the pressure receiving portion and the pressure-reducing operation portion coupled to the pressure receiving portion, the decompression operation The cover is selectively openable and closeable, characterized in that detachably coupled to the coupling groove formed on the side of the pressure receiving portion. 10. The cover assembly of claim 9, wherein the width of the coupling groove is greater than the thickness of the decompression operation portion. 10. The method of claim 9, wherein the bracket has a U-shape, and the opening and closing operation portion and the decompression operation portion is selected, characterized in that the projections projecting from both sides are coupled to the coupling grooves formed on both side walls of the bracket. Cover assembly that can be opened and closed automatically. 10. The method of claim 9, wherein the elastic support is formed protruding from the opening and closing operation portion and the first elastic support extending between the first bracket and the opening and closing operation portion and the decompression operation portion formed protruding from the second bracket and the decompression operation portion Selective opening and closing cover assembly characterized in that it consists of a second elastic support extending between. The cover assembly of claim 8, wherein a depth at which the pressure reducing plug is inserted into the pressure reducing hole is shallower than a depth at which the opening and closing plug is inserted into the liquid outlet hole. The method of claim 8, wherein the pressure reducing hole is formed with a step so that the back side of the cover plate is enlarged, and the pressure reducing plug is in close contact with the edge of the step to selectively seal the pressure reducing hole Cover assembly available. 15. The cover assembly of claim 14, wherein the pressure reducing plug is hemispherical or ellipsoidal. The method of claim 8, wherein the pressing button A guide block having both ends communicating with a flange formed at one end thereof and fixed through the cover plate, and having a plurality of engaging jaws and slide grooves sequentially formed on an inner wall thereof, and having a stepped portion formed at an inner bottom thereof; Caps are installed at one end and teeth are formed at the periphery of the other end and the spring is housed therein, the inside of the guide block is slidable along the slide groove and coupled to the step. Being a slider; One end is accommodated in the slider is rotated by the teeth with respect to the linear movement of the slider, in response to the rotation includes a pressing piece that is caught in the locking groove of the guide block or slide along the slide groove sequentially Cover assembly capable of selectively opening and closing, characterized in that. 17. The cover assembly of claim 16, wherein an O-ring is installed between the flange back surface of the guide block and the cover plate and between the stepper and the slider of the guide block. A cover assembly of claim 1; And a container coupled with the cover assembly. 19. The container of claim 18 wherein the cover assembly and the container are screwed together.