KR20220102365A - valve body for maintaining and releasing pressure - Google Patents

Abstract

Disclosed is a valve body for maintaining and releasing pressure. The valve body for maintaining and releasing pressure is provided on a second case which is detachably coupled to a first case having an internal accommodating space to maintain pressure of the internal accommodating space of the first case uniformly or release the maintained pressure when the first case and the second case are separated. The valve body is coupled to the second case to be able to move in a direction corresponding to the coupling and separation directions of the second case with respect to the first case, while being hung on the inner side surface of the second case. The valve body includes a moving sealing member which gets in close contact with an open end of the first case to seal the internal accommodating space of the first case when the first and second cases are coupled. The valve body has a simple structure which has a first moving contact portion and a second moving contact portion to be able to move between a first retaining protrusion and a second retaining protrusion of the second case according to the coupling and uncoupling actions of the second case with respect to the first case, thereby providing excellent productivity and assemblability, and being applied easily to various products which can maintain and release internal pressure of the first case when necessary.

Description

Valve body for maintaining and releasing pressure

The present invention relates to a valve body for maintaining and releasing pressure of a simple structure that can be easily employed in various products for forming a set pressure such as a vacuum pressure therein and releasing the currently maintained set pressure when necessary.

In general, a vacuum storage case is used to store food, clothes, bedding, etc. inside in a vacuum state.

Conventionally, after forming a vacuum hole in the vacuum storage case, the inside is evacuated through the vacuum hole with a vacuum machine, and then the vacuum hole is closed with a tape to enable vacuum storage for a longer period of time.

However, in this vacuum storage case, even if the vacuum hole is closed with a tape, not only can the inflow of outside air be made in the process of attaching the tape for closing the vacuum hole, but also the outside air can be introduced into the vacuum pack due to the gap caused by incorrect attachment. There was a problem that the inflow of can be made.

In recent years, a check valve of a thin film is additionally installed in the vacuum hole of the vacuum storage case so that the vacuum hole can be opened only when the vacuum inside the vacuum storage case is evacuated using the vacuum machine. Publication No. 10-2008-0017051, Patent Publication No. 10-2010-0105089, as described in Korean Patent Publication No. 10-1001750.

However, the vacuum valve body disclosed in the above publication has a complex structure, so it is difficult for an operator to quickly assemble it, and the manufacturing cost is increased. Accordingly, the applicant of the present application proposes a valve body having a simple structure, excellent assembly, and easily adopted and used in all products that want to form a vacuum therein.

Republic of Korea Patent Publication No. 10-1336972 (2013. 12. 04 Announcement)

The present invention has been devised to solve the above-mentioned problems of the prior art, it has a simple structure, has a small number of parts, is excellent in production and assembly, and forms a set pressure such as a vacuum pressure, and releases the currently maintained set pressure when necessary. An object of the present invention is to provide a valve body for pressure maintenance and release that can be easily adopted and used in various products for

According to one aspect of the present invention, provided in a second case that is detachably coupled to the first case having an internal accommodating space to maintain a constant pressure of the internal accommodating space of the first case, or to separate the first and second cases In order to release the pressure maintained at the time, it is coupled to the second case so as to be movable along a direction corresponding to the coupling and separation direction of the second case with respect to the first case in a state caught on the inner surface of the second case. And, when the first and the second case is coupled, it includes a movable contact body for sealing the inner accommodation space of the first case in close contact with the open end of the first case, and on the inner surface of the second case, In accordance with the movement of the second case with respect to the first case, it is inserted into the movable adhesive to seal the inner accommodating space and is spaced apart from the movable adhesive to release the current holding pressure of the internal accommodating space. A valve body for maintaining and releasing pressure in which holding and releasing protrusions are provided is provided.

The movable contact body may include: a first movable contact unit provided to be slidably movable with an end caught in a region between the first locking protrusion and the second locking protrusion formed on the inner surface of the second case; and the first moving contact unit and integrally coupled to slide and move at the same time, and when the first and second cases are combined, the first locking protrusion and the first moving contact unit are pressed by the first moving contact unit to remove the first case. It may include a second movable contact part that can be in close contact with the open end.

When the first and second cases are coupled, the second moving contact portion may be pressed toward the first case by the pressure maintaining and releasing protrusion to be in close contact with the open end of the first case.

The pressure holding and releasing protrusion is provided to be tapered so that the cross-sectional area decreases toward the protruding end thereof, and the first moving contact portion is provided with a first protrusion insertion hole through which the end of the pressure holding and releasing protrusion passes, 2, a second protrusion insertion hole is provided in the moving contact portion to insert and contact the ends of the pressure holding and releasing protrusions, and the inner wall forming the second protrusion inserting hole is tapered to correspond to the pressure holding and releasing protrusions. can be adhered to.

Steps may be continuously provided in the pressure maintaining and releasing protrusion along the circumferential direction so as to be in contact with the upper surface of the second moving contact unit and pressurized.

The second moving contact part may be made of a silicone or rubber material.

A first inclined surface is continuously provided at the open end of the first case in a circumferential direction, and a second inclined surface is continuously provided along the circumferential direction so as to be in close contact with the first inclined surface at an edge of the second moving contact part. can be

The first moving contact unit and the second moving contact unit may further include an exposure prevention cover unit coupled to the first case to prevent external exposure of the bottom surface of the second moving contact unit when the second case is separated from the first case.

The exposure prevention cover portion, the cover body; and a plurality of protruding rods protruding from one side of the cover body, and a protruding rod insertion hole may be provided in the second moving contact part to force the plurality of protruding rods to be press-fitted.

The pressure maintaining and releasing protrusion and the movable contact body may be provided to allow relative movement with each other.

According to the valve body for maintaining and releasing the pressure of the present invention described above, the first to be movable between the first locking projection and the second locking projection of the second case according to the coupling and separation operation of the second case with respect to the first case. As it has a simple structure including a moving adhesion part and a second moving adhesion part, it is excellent in production and assembly, and it can be easily adopted and used in various products that can maintain the internal pressure of the first case and release it when necessary.

In addition, in a state in which the first case and the second case are coupled, when the second case is moved so as to be slightly spaced apart from the first case, the pressure maintaining and releasing protrusion is released in close contact with the second protrusion insertion hole, and the first case As the vacuum state of the internal space is released, the user can more easily separate the second case from the first case.

In addition, when the first case and the second case are coupled, the first locking protrusion presses the first moving contact part and the second moving contact part toward the first case side to bring the first inclined surface and the second inclined surface into close contact to maintain airtightness, The pressure retention and release protrusion presses the central region of the second moving contact part, so that the first inclined surface and the second inclined surface can be more reliably adhered to each other.

In addition, the pressure retention and release protrusions are provided to be tapered, and the movable adhesive body is provided slidably on the inner surface of the second case according to the coupling and separation operation of the second case with respect to the first case, so that the set pressure inside the first case Maintenance and, if necessary, pressure release can be easily performed.

In addition, it is possible to compensate for the deterioration of the aesthetics by preventing the second moving contact part and the pressure maintaining and releasing protrusion from being exposed to the outside through the exposure prevention cover part.

1 is a cross-sectional view showing a state in which a pressure maintenance and release valve body is installed according to an embodiment of the present invention to maintain pressure in a target space;
Figure 2 is an enlarged view of the main part of Figure 1;
3 and 4 are views sequentially showing a process in which the second case is separated from the first case in FIG. 2;
Figure 5 is an exploded perspective view of Figure 1;
Figure 6 is a bottom perspective view of Figure 5;
7 is a perspective view illustrating an exposure prevention cover portion of a valve body for maintaining and releasing pressure according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments allow the disclosure of the present invention to be complete, and the scope of the invention to those of ordinary skill in the art completely It is provided to inform you. In the drawings, like reference numerals refer to like elements.

The valve body for pressure maintenance and release according to a preferred embodiment of the present invention can maintain a constant pressure in the internal accommodation space and can easily release the pressure in some cases, and has a simple structure and is produced with a small number of parts. And it has excellent assembling property and can be easily adopted and used in various products for forming a vacuum pressure in, for example, an internal accommodation space.

Hereinafter, the present invention will be described in detail with reference to Examples.

1 to 4, the pressure maintenance and release valve body (10, hereinafter, the valve body) according to an embodiment of the present invention is separated with respect to the first case 20 having an internal accommodation space 21 It is provided in the second case 30 that is possibly coupled. That is, by coupling the second case 30 to which the valve body 10 according to the embodiment of the present invention is coupled to the first case 20, the internal accommodation space 21 of the first case can be maintained at a constant pressure, and , it is possible to release the pressure maintained by separating the second case 30 from the first case 20 in some cases.

On the other hand, as shown in FIG. 1 , the lower portion of the first case 20 receives vacuum pressure from a vacuum pressure supply means (not shown) to form a vacuum in the internal accommodation space 21 and maintain the vacuum state. A separate vacuum valve body 50 is provided, and therefore, a case in which the inner space of the first case 20 is formed in a vacuum and the vacuum is released will be described below.

In other words, in a state in which the second case 30 to which the valve body 10 is coupled is coupled to the first case 20, the vacuum pressure supply means (not shown) and the vacuum valve body 50 cause the first case ( When a vacuum pressure is formed in the inner accommodation space 21 of the 20), the valve body 10 according to the embodiment of the present invention can maintain this vacuum pressure. In addition, the vacuum is released by separating the second case 30 from the first case 20 while the vacuum pressure is maintained inside the case. The inside of the first case 20 may accommodate a pill that needs to be stored in a vacuum.

1 to 4 , the valve body 10 according to the embodiment of the present invention includes a movable adhesive body 100 .

The movable contact body 100 moves along a direction (up and down direction based on the drawing) corresponding to the coupling and separation direction of the second case with respect to the first case 20 in a state of being caught on the inner surface of the second case 30 . It is coupled to the second case 30 to be possible.

That is, when the first case 20 and the second case 30 are coupled, the movable contact body 100 is in close contact with the open end of the first case 20 to accommodate the inner accommodating space of the first case 20 . can be stably sealed to the outside to maintain a vacuum state.

The movable adhesive body 100 includes a first movable adhesive part 200 provided to be movable inside the second case 30 , and a second movable adhesive part 300 integrally coupled to the first movable adhesive part 200 . ) is included.

2 and 3, based on the state in which the first case 20 and the second case 30 are substantially arranged in a straight line, the first moving contact unit 200 is the first case ( 20) is provided to be slidably movable in a direction approaching or spaced apart.

Specifically, as shown in FIGS. 1 to 4 and 6 , on the inner surface of the second case 30 , the first locking protrusions 31 are continuously provided in a stepped state along the circumferential direction, and the second The locking protrusion 32 is provided in plurality to be spaced apart from each other along the inner surface circumferential direction of the second case 30 to be spaced apart from the first locking protrusion 31, and the third locking projection 33 is likewise a second locking protrusion (32) and spaced apart from each other along the inner surface circumferential direction of the second case is provided in plurality. Another fourth locking projection 22 is provided on the outer surface of the first case 20 to be interposed between the second locking projection 32 and the third locking projection 33 when the first case and the second case are coupled. , the fourth locking protrusion 22 is continuously provided along the circumferential direction of the first case 20 .

The first moving contact unit 200 includes a first moving plate 210 and a bending unit 220 provided to be bent at an end of the first moving plate 210 , and the bent unit 220 includes a first locking protrusion. It is disposed in the region between the 31 and the second locking protrusion 32 and has a state locked by the first locking protrusion and the second locking protrusion to prevent external departure. Accordingly, the first moving contact part 200 can slide in the vertical direction within the region between the first locking protrusion 31 and the second locking protrusion 32 when an external force is applied. A first protrusion insertion hole 230 is provided in the first moving plate 210 so that an end of the pressure maintaining and releasing protrusion 34, which will be described later, is inserted through the first moving plate 210 .

The second moving contact unit 300 is integrally coupled with the first moving contact unit 200 so that it can slide and move at the same time. Specifically, the second moving contact unit 300 includes a second moving plate 310 , a protrusion 320 protruding from one surface of the second moving plate 310 , and a second moving plate 310 protruding from the other surface of the second moving plate 310 . 1 includes a sealing protrusion 330 that can seal the open end of the case 20 . A second protrusion insertion hole 340 is provided in the second moving plate 310 and the protrusion 320 so that an end of the pressure maintaining and releasing protrusion 34, which will be described later, is inserted. In an embodiment of the present invention, the second moving contact part 300 is made of a silicone or rubber material having a ductility of a predetermined or higher.

Here, the protrusion 320 is fixed to the first protrusion insertion hole 230 of the first moving contact part 200 by forcible press-fitting, and the second moving plate 310 is the first moving plate 210 and the bent portion. It is press-fitted into the space between the 220 and can be fixed.

In the embodiment of the present invention, as shown in FIGS. 1 to 6 , the first inclined surface 23 is continuously provided at the opened end of the first case 20 along the circumferential direction, and the second moving contact part On the edge of 300 , specifically, on the outer surface of the closing protrusion 330 , the second inclined surface 350 is continuously provided along the circumferential direction so as to be in close contact with the first inclined surface 23 . Therefore, in a state in which the user presses the second case 30 toward the first case 20 to complete the coupling, the first inclined surface 23 and the second inclined surface 350 come into close contact with each other and the internal accommodation space through the corresponding portion. It is possible to maintain the pressure by preventing the air in (21) from leaking to the outside.

In the embodiment of the present invention, a pressure retention and release protrusion 34 is provided on the inner surface of the second case 30 .

The pressure retention and release protrusion 34 presses the central portion of the second moving contact unit 300 when the first case 20 and the second case 30 are coupled, thereby sealing the second moving contact unit 300 . The second inclined surface 350 of the protrusion 330 is pressed toward the first case 20 by the pressure retention and release protrusion 34 , so that the opened end of the first case 20 , that is, the first inclined surface 23 . It performs the function of making it more firmly adhered.

In addition, as will be described later, the pressure retention and release protrusion 34 separates the second case from the first case to release the internal vacuum pressure of the first case, so that the user can separate the first case more easily. It performs the function of releasing the internal vacuum pressure of the case. Here, the pressure holding and releasing protrusion 34 is provided to be able to move relative to the first moving contact unit 200 and the second moving contact unit 300 , and a pressure release method will be described later.

On the other hand, as shown in FIGS. 1 to 4 , when the first case 20 and the second case 30 are coupled, the pressure maintaining and releasing protrusion 34 is the first of the first moving contact part 200 . Penetrates the protrusion insertion hole 230 and is partially inserted into the second protrusion insertion hole 340 of the second moving contact unit 300. In order to maintain the pressure in the first case 20, the pressure retention and release protrusion 34 The airtightness of the part in contact with it is required.

If such airtightness is not secured, the inside of the first case 20 through the gap between the pressure retention and release protrusion 34 and the adjacent components, and the gap between the first moving contact part 200 and the first locking protrusion 31 . A flow path through which air can be discharged to the outside is created, and thus a pressure loss occurs.

In order to secure the airtightness of the aforementioned portion, as shown in FIGS. 1 to 4 , the pressure retention and release protrusion 34 is tapered so that the cross-sectional area decreases toward the protruding end thereof, and the second protrusion insertion hole ( The inner wall forming the 340 is also tapered to correspond to the pressure retention and release protrusion 34 so as to be in close contact with each other.

As described above, the outer surface of the pressure holding and releasing protrusion 34 and the inner wall of the second protrusion insertion hole 340 are provided to be tapered to correspond to each other, so that the second case 30 is pressed toward the first case 20 and coupled thereto. At the same time, the outer surface of the pressure retention and release protrusion 34 is in close contact with the inner wall of the second protrusion insertion hole 340 and at the same time presses the central portion of the second moving contact unit 300 in the coupling direction.

Therefore, the first case 20 is not only in close contact with the first inclined surface 23 and the second inclined surface 350 more effectively, but also due to the adhesion between the pressure retention and release protrusion 34 and the inner wall of the second protrusion insertion hole 340 . ) to prevent pressure loss in the internal space.

In other words, in the current state in which the first case 20 and the second case 30 are coupled to each other, the internal space of the first case 20 forms a vacuum pressure, whereas the internal space of the second case 30 . is at atmospheric pressure. If, in a state in which the first case 20 and the second case 30 are coupled to each other, the pressure maintaining and releasing protrusion 34 and the second protrusion insertion hole 340 do not come into close contact with each other, the vacuum pressure supply means is used. Even if vacuum pressure is provided inside the first case through It is not possible to maintain the set vacuum pressure state by being introduced into the interior. Here, since the second moving adhesion part 300 is made of a silicone or rubber material, the airtight maintenance effect through such adhesion may be increased.

In addition, as shown in Fig. 2, the pressure holding and releasing protrusion 34 is provided with a step 35 continuously along the circumferential direction so as to come into contact with the upper surface of the second moving contact part 300, such a step. By increasing the contact area between the pressure maintaining and releasing protrusion 34 and the second moving contact part 300 through (35), it is possible to provide an airtight improvement effect according to the increase of the mutual contact area. In addition, the pressure retention and release protrusion 34 through the stepped 35 also has an effect that can more stably press the second moving contact part 300 .

1 to 7, the valve body 10 according to the embodiment of the present invention is an exposure prevention cover part 400 that is coupled to the first moving contact unit 200 and the second moving contact unit 300. ) is further included.

This exposure prevention cover part 400 prevents the external exposure of the bottom surface of the second moving contact part 300 when the second case 30 is separated from the first case 20 to compensate for the deterioration of the aesthetics. have. A trade name, a pattern, etc. may be provided on the bottom surface of the exposure prevention cover part 400 .

The exposure prevention cover unit 400 includes a cover body 410 and a plurality of protruding rods 420 protruding from one side of the cover body 410 , and a plurality of protruding rods 420 in the second moving contact unit 300 . ) is provided with a protruding rod insertion hole 360 to be forcibly press-fitted. As described above, through the forced press-fitting of the protruding rod 420 , the exposure prevention cover unit 400 is firmly coupled to the second moving contact unit 300 , and the first moving contact unit 200 , the second moving contact unit 300 and can be moved at the same time. In addition, since the second moving contact part 300 is made of an elastic material such as rubber or silicone and the protruding rod 420 is fixed through forced press-fitting, it is possible to prevent pressure loss from occurring through the portion where the protruding rod is forcibly press-fitted. have.

On the other hand, another protruding rod insertion hole 240 may be provided in the first moving contact unit 200 , and the protruding rod 420 is forced into the protruding rod insertion hole 240 of the first moving contact unit 200 . By press-fitting, the above-described bonding force can be further increased. Here, a flow path including a predetermined gap or more is provided between the cover body 410 and the second moving contact part 300 .

Hereinafter, the coupling and separation relationship of the valve body 10 according to an embodiment of the present invention will be described.

First, as shown in FIG. 2 , in a state in which the first case 20 and the second case 30 are mutually coupled, the edge of the movable contact body 100 is the first locking protrusion of the second case 30 . It is pressed by 31 and thus the first inclined surface 23 and the second inclined surface 350 are in close contact.

In addition, the pressure retention and release protrusion 34 having a tapered outer surface is inserted into the second protrusion insertion hole 340 to press the central region of the second moving contact unit 300 downward, and at this time, the second moving contact unit is inserted into the second projection insertion hole 340 . The edge of the part 300 is pressed toward the open end of the first case 20 so that close contact between the first inclined surface 23 and the second inclined surface 350 can be made more stably.

When the edge of the above-described second moving contact part 300 is pressed toward the open end of the first case 20 , the pressure maintaining and releasing protrusion 34 is provided to be tapered, and the second protrusion insertion hole 340 is formed. This becomes possible as the inner wall is also tapered.

Accordingly, the first case 20 through the close contact between the first inclined surface 23 and the second inclined surface 350, the pressure maintenance and the inner wall forming the release protrusion 34 and the second protrusion insertion hole 340, The internal accommodation space 21 can constantly maintain the pressure provided by the vacuum pressure supply means (not shown) without pressure loss. For example, the inner accommodating space 21 of the first case 20 may maintain a vacuum state, and the inner space of the second case 30 may have an atmospheric pressure state.

Next, when the user wants to separate the second case 30 with respect to the first case 20 in order to use the pills accommodated in the first case 20, the second case 30 is pulled outward. .

As shown in FIG. 3 , in the initial stage of pulling the second case 30 , the first inclined surface 23 and the second inclined surface 350 maintain contact with each other, but only the pressure retention and release protrusions 34 . ) is released from the close contact with the second protrusion insertion hole 340 , and a gap of more than a certain level is generated between the pressure retention and release protrusion 34 and the inner wall forming the first protrusion insertion hole 230 .

That is, at the initial stage of pulling the second case 30, the first moving contact unit 200 and the second moving contact unit 300 maintain the coupling position when the first case and the second case are coupled to each other, and and only the pressure retention and release protrusion 34 moves upward.

Accordingly, the inner space of the second case 30 and the inner accommodating space 21 of the first case 20 are formed between the pressure retention and release protrusion 34 and the inner wall forming the first protrusion insertion hole 230 . The gap, the second protrusion insertion hole 340 , and the area between the second moving contact part 300 and the exposure prevention cover part 400 communicate with each other through the gap.

On the other hand, as described above, the inner space of the first case 20 maintains a vacuum state, and the inner space of the second case maintains an atmospheric pressure state, and the second case 30 through the communication structure described above. The internal air may flow into the first case 20 to release the vacuum state of the internal space of the first case 20 .

In addition, as shown in FIG. 3 , the present invention primarily lifts the second case 30 upward to maintain pressure and release the protrusion 34 and the first protrusion insertion hole 230 in close contact between the inner wall forming the insertion hole 230 . By first releasing the vacuum of the inner space of the first case 20 by releasing the state, the user can easily lift the second case 30 from the first case with much less force to completely separate it from the first case .

That is, the pressure maintaining and releasing protrusion 34 primarily performs a function for maintaining the vacuum pressure inside the first case. On the other hand, when the user wants to separate the second case 30 from the first case 20, it is generally difficult to easily lift the second case due to the vacuum pressure inside the first case, but the pressure maintenance and release protrusion 34 is A flow path for releasing the vacuum pressure is formed so that the air inside the second case flows into the first case, and a function of lifting and separating the second case by a user with much less force is secondary.

Then, when the user pulls the second case 30 a little more, the second locking protrusion 32 moves the end of the first moving contact part 200 in a direction spaced apart from the first case 20 (separation of the second case) direction) is pressed. Accordingly, the close contact state between the first inclined surface 23 and the second inclined surface 350 is released, and the first case and the second case are completely separated.

On the other hand, as shown in Figures 3 and 4, when the user performs the operation of lifting the second case 30 upward, the third locking projection 33 is the fourth locking projection 22 of the first case ), the lower part of the second case is momentarily opened to the outside and expanded. In the present invention, the extension of the second case is made more easily, so that the user can easily separate the second case from the first case. A plurality is provided to be spaced apart from each other as shown in FIG. 6 along the circumferential direction of the .

In the foregoing, the present invention has been shown and described in connection with preferred embodiments for illustrating the principles of the present invention, but the present invention is not limited to the construction and operation as shown and described as such. Rather, it will be apparent to those skilled in the art that many changes and modifications can be made to the present invention without departing from the spirit and scope of the appended claims.

10: valve body for pressure maintenance and release 20: first case
22: the fourth stopping protrusion 23: the first slope
30: second case 31: first locking projection
32: second locking projection 33: third locking projection
34: pressure retention and release projection 35: step
100: movable adhesive 200: first movable adhesive part
210: first moving plate 230: first projection insertion hole
240: protrusion rod insertion hole 300: second moving contact part
310: second moving plate 320: protrusion
330: sealing protrusion 340: second protrusion insertion hole
350: second inclined surface 400: exposure prevention cover part
410: cover body 420: protruding rod

Claims (10)

Provided in the second case detachably coupled to the first case having an internal accommodating space to maintain a constant pressure of the internal accommodating space of the first case or to release the pressure maintained when the first and second cases are separated As that,
It is coupled to the second case so as to be movable along a direction corresponding to the coupling and separation direction of the second case with respect to the first case in a state caught on the inner surface of the second case, and When coupled, it includes a moving contact body for sealing the inner accommodation space of the first case in close contact with the open end of the first case,
On the inner surface of the second case, it is inserted into the movable adhesive body according to the movement of the second case with respect to the first case to seal the internal accommodation space and is spaced apart from the movable adhesive body to form the current of the internal accommodation space. A valve body for maintaining and releasing pressure in which pressure holding and releasing projections are provided to release the holding pressure. According to claim 1,
The movable adhesive body,
a first moving contact part provided to be slidably movable with an end caught in a region between the first locking protrusion and the second locking protrusion formed on the inner surface of the second case; and
It is integrally coupled with the first moving contact unit to slide and move at the same time, and when the first and second cases are coupled, the first locking protrusion and the first moving contact unit are pressed by the first moving contact unit to open the first case. A valve body for maintaining and releasing pressure, characterized in that it includes a second movable contact part that can be in close contact with the finished end. 3. The method of claim 2,
When the first and second cases are coupled, the second moving contact portion is pressed toward the first case by the pressure holding and releasing protrusion to be in close contact with the open end of the first case. for valve body. 3. The method of claim 2,
The pressure holding and releasing projection is provided to be tapered so that the cross-sectional area decreases toward the protruding end thereof,
A first protrusion insertion hole is provided in the first moving contact portion so that the ends of the pressure holding and releasing protrusions pass through, and the second protrusion insertion hole is provided in the second moving contact unit with the ends of the pressure holding and releasing protrusions being inserted into contact with each other. An insertion hole is provided, and the inner wall forming the second protrusion insertion hole is tapered to correspond to the pressure retention and release protrusion, and the pressure retention and release valve body, characterized in that they can be in close contact with each other. 5. The method of claim 4,
The pressure holding and releasing protrusion has a pressure holding and releasing valve body, characterized in that a step is continuously provided along the circumferential direction so as to be in contact with the upper surface of the second moving contact unit and pressurize. 6. The method according to any one of claims 2 to 5,
The second moving contact part is a valve body for maintaining and releasing pressure, characterized in that made of silicone or rubber material. 6. The method according to any one of claims 2 to 5,
A first inclined surface is continuously provided at the open end of the first case in a circumferential direction, and a second inclined surface is continuously provided along the circumferential direction so as to be in close contact with the first inclined surface at an edge of the second moving contact part. A valve body for pressure maintenance and release, characterized in that it becomes. 3. The method of claim 2,
It characterized in that it further comprises an exposure prevention cover part coupled to the first moving contact part and the second moving contact part to prevent external exposure of the bottom surface of the second moving contact part when the second case is separated from the first case. A valve body for maintaining and releasing pressure. 9. The method of claim 8,
The exposure prevention cover part,
cover body; and
It includes a plurality of protruding rods protruding from one side of the cover body,
The pressure maintaining and releasing valve body, characterized in that the second moving contact portion is provided with a protruding bar insertion hole so that the plurality of protruding bars are forcibly press-fitted. According to claim 1,
The pressure maintaining and releasing protrusion and the movable adhesive body are provided to allow relative movement between each other.

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