CN1498184A - Check valves and liquid containers with check valves - Google Patents

Abstract

A check valve, wherein a tubular body having a through-passage is installed, a valve element formed with an elastic material having an opening part near the tip thereof is installed, so as to cover the tubular body, and a skin body having an opening part near the tip thereof is installed so as to cover the valve element. A liquid container, comprising an outlet for discharging contents, wherein a reverse flow prevention valve having an opening part closed in normal state and opened when a pressure in the container rises is installed at the outlet, a measuring container is installed at the tip of the outlet, and a cap having an intake with a reverse flow prevention valve with an opening part closed in normal state and opened when the pressure in the container is negative is fitted to the opening part, whereby, when the contents once discharged into the measuring container is distributed at the time of metered distribution, the contents beyond a metered volume is prevented from flowing out of a container body.

Description

Check valves and liquid containers with check valves

technical field

The present invention relates to a check valve and a liquid storage container with the check valve.

technical background

Japanese Patent Application Laid-Open No. 60-89143 and Japanese Patent Application Publication No. 2-83257 disclose a check valve or plug structure. The check valve or plug structure is to install an elastic body at the mouth of the container, and a slit is provided on the elastic body, and the liquid or the like squeezed out by the internal pressure of the container generated by applying external pressure to the container will open the slit and open. When the external pressure applied to the container body is removed after the liquid etc. are discharged, the elastic body closes the gap by its own restoring force.

In the previous publication, an elastic or flexible material is used to form the bolt. The bolt has a cannonball-shaped appearance, a dome-shaped cavity inside, and at least one slit at its front end.

In the latter publication, an elastic material is used to form a thin-plate-shaped upper wall panel concaved in an arcuate shape, and a slit is formed in the center thereof.

However, in the above-mentioned prior art, the elastic portion with the slit, which is a vital part of the valve mechanism, is exposed outside, so the elastic portion may be accidentally touched.

The elastic portion must have a corresponding elastic force that can prevent leakage from the gap, but if the elastic force is too high, it will not be easy to discharge and the convenience of the container will be reduced. For this reason, do not give it excessive elastic force, but, in order to seal the gap, do not utilize any other measures except the elastic force of this elastic body, so, make the gap continue to keep close, relying on elastic force alone is not enough. Therefore, as shown in FIG. 13, when any external force is applied to the elastic body, it is easily deformed to release the tightness of the gap, so that the liquid in the container leaks or the air is sucked into the container.

More specifically, most tubular containers are currently made of laminated materials, and since they are elastic bodies, the container body has a strong resilience. That is, negative pressure is created in the container body due to the restoring force of the container body, and the contents that have been extruded to the opening of the nozzle may be returned to the container. However, in the above-mentioned previous publication, although measures are taken to prevent the elastic portion from excessive expansion due to the internal pressure of the container, no measures are taken to prevent the elastic portion from shrinking. Therefore, as shown in FIG. 14 , the elastic body acts in a direction in which the cylindrical portion is crushed and the slit is opened.

The same situation also occurs in the above-mentioned latter publication. That is, when the inside of the container becomes a negative pressure, the arc-shaped upper wall plate becomes the situation opposite to that of the above-mentioned former technique, and the slit is easy to open.

The disadvantages of the above-mentioned two technologies are more serious than the disadvantages of content leakage in such a situation.

Like this, in the past technology that uses slit as a simple valve, it is only allowed to discharge when the internal pressure of the container is high, and stop the discharge when the internal pressure drops, but there is no technical idea to prevent air from being sucked into the container. Therefore, the valve mechanism has an extremely simple structure, and cannot be used in containers for containing substances such as food, cosmetics, and chemicals that are not expected to be oxidized by contact with air.

On the other hand, liquids that need to be metered include medicines, cosmetics, paints, detergents, etc.

In the case of medicines and the like, a constant amount is often measured out of a bottle with a measuring cup and used. In addition, liquid containers for detergents that are used in a larger amount than medicines at one time are often used as bottle caps as measuring cups or pump-type synthetic resin bottles. The former is used by removing the measuring cup from the container body. Although the required amount can be measured freely, it is not suitable for accurate measurement. In the latter case, a hand-operated pump is provided on the upper opening of the synthetic resin container body, and the pump is pressed by hand when necessary to discharge the contents. In this way, the amount discharged by one pressing action of the hand is almost constant.

However, the container with the measuring cup is used to pour out the content from the container body against the scale provided on the measuring cup, so it is not suitable for accurate measurement, and it may overflow when pouring out. In addition, since the pouring spout is always open, when dispensing the contents measured by the measuring cup, an excess amount of the substance will flow out from the container body. Also, if the cap is not screwed on tightly, the contents will leak out should the container tip over.

In the pump bottle, the return spring of the pump is made of metal, so the container is not made of a single material, and even if it can be made of a single material, it is unrealistic due to high cost. Moreover, especially now that the whole society is raising awareness of environmental protection, the problem of garbage disposal cannot be ignored.

Therefore, the present invention is to solve the above-mentioned problems in the prior art, and an object of the present invention is to provide a check valve that can reliably function, and a container including the check valve.

In addition, the container with liquid metering function of the present invention can solve the above-mentioned problems of the prior art, and can be made of a single material. Not only is the structure simple, but also the check valve can be used to prevent accidental discharge. The liquid above the liquid flow out from the container body.

Contents of the invention

The check valve of the present invention has the following features.

(1) It is a valve located at the discharge port of the fluid container, and has a cylindrical body, a valve body covering the cylindrical body, and an outer skin body covering the valve body; the cylindrical body has a through passage; the valve body is made of elastic material It is made to have an opening near its front end; the above-mentioned outer skin body has an opening near its front end.

(2) It is a valve located at the discharge port of the fluid container, and has a cylindrical body, a valve body covering the cylindrical body, and an outer skin body covering the valve body; the cylindrical body has a passage through it; the valve body is at its front end There is an opening in the vicinity; the outer skin body has an opening near its front end; and the check valve also has a protective cover that only exposes the opening of the outer skin body.

(3) In the discharge direction of the fluid, a space is provided between the front end of the cylindrical body and the inner surface of the sheath, and the valve body separates the space into front and back.

(4) The valve body is made of elastic body, and the opening near the top is a slit, which is tightly closed under the normal state by the elastic force of the valve body itself, and is released by the internal pressure of the container to open the mouth.

(5) The gap is composed of multiple cuts.

(6) The cylindrical body and the valve body are integrally formed.

(7) The upper end of the cylindrical body and the inner surface of the valve body are made into mutually suitable shapes, so that the passage of the cylindrical body is branched in the cylindrical body, and an opening is provided at the top of the position avoiding the opening of the valve body. The opening of the body is closed, and the opening of the cylindrical body is in close contact with the upper surface of the cylindrical body to be blocked. When the internal pressure of the container rises and the valve body expands toward the discharge port, the close contact between the two is released, and the valve body The opening is opened to discharge the contents.

(8) The upper end of the cylindrical body and the inner surface of the valve body are made into mutually compatible shapes, and there is a protrusion on the top inside of the valve body to cooperate with the passage opening of the cylindrical body to block it, and there is a protrusion around the protrusion. Opening part, under normal conditions, the protrusion of the valve body blocks the opening of the cylindrical body, but when the internal pressure of the container rises and the protrusion of the valve body is pushed toward the discharge port, the passage is opened and the contents can be discharged.

(9) The upper end of the cylindrical body and the inner surface of the valve body are made into a shape that cooperates with each other. On the top of the cylindrical body, a protrusion protruding toward the discharge port is provided, and an opening for the passage is provided around it. The top has an opening that cooperates with the protrusion of the cylindrical body to block the passage. Under normal conditions, the protrusion of the cylindrical body blocks the opening of the valve body. When the internal pressure of the container rises and the valve body expands toward the discharge port , the passage is open and the contents can be discharged.

(10) The upper end of the cylindrical body and the inner surface of the valve body are made into a shape that cooperates with each other. On the inside of the top of the valve body, there is a protrusion that cooperates with the passage opening of the cylindrical body to block it. There is an opening around it, and the valve body can move in the discharge direction between the front end of the cylindrical body and the inner side of the outer skin body. Spring, under normal conditions, the protrusion of the valve body blocks the opening of the cylindrical body. When the internal pressure of the container rises and the protrusion of the valve body moves toward the discharge port against the spring, the passage is opened and the contents can be discharged.

(11) The upper end of the cylindrical body and the inner surface of the valve body are made into mutually suitable shapes, and the top of the cylindrical body is provided with a protrusion protruding toward the direction of the discharge port, and the opening of the passage is provided around it, and the opening of the passage is provided on the valve body. The top has an opening that cooperates with the protrusion of the cylindrical body and blocks the passage. The valve body can move in the discharge direction between the front end of the cylindrical body and the inner side of the outer skin body. The spring that springs the valve body against the cylindrical body. Under normal conditions, the protrusion of the cylindrical body blocks the opening of the valve body. When the internal pressure of the container rises and the valve body moves toward the discharge port against the spring , the passage is open and the contents can be discharged.

(12) Before the external pressure applied to the container reaches a certain size, the opening of the valve body is opened, and the contents are discharged from the discharge port. When the external pressure exceeds a certain size, the upper surface of the valve body is tightly connected to the inner surface of the outer skin. Contact, block the opening of the valve body, and stop the discharge.

In addition, the liquid container having the check valve of the present invention is characterized in that, in the check valve having the above-mentioned features, the tube and the container body are bottles, small bags or stand pouches formed of flexible materials. ).

The liquid container of the present invention has the following features.

(1) A liquid container having a discharge port for discharging contents, wherein a backflow prevention valve is provided at the discharge port, and the backflow prevention valve has an opening that is normally closed and opens when the internal pressure of the container rises; There is a metering container at the discharge end of the liquid container, and a cover with a suction port at the opening, and the suction port has a backflow prevention valve that has an opening that is normally closed and opened by negative pressure inside the container. When dispensing by metering, once the contents in the metering container are dispensed, no more than the metered amount of the contents will flow out from the container body.

(2) A liquid container having a discharge port for discharging contents, wherein a backflow prevention valve is provided at the discharge port, and the backflow prevention valve has a cylindrical body with a through passage, a valve body covering the cylindrical body, and Covering the outer skin of the valve body; the valve body is made of elastic material, and has an opening near its front end that is normally closed and opened when the internal pressure of the container rises; the outer skin has an opening near its front end; The discharge front end of the liquid container has a metering container, and a cover with a suction port at the opening. The suction port has a backflow prevention valve made of elastic material and has a closed, The opening opened during negative pressure in the container prevents more than the metered amount from flowing out from the container body when the contents once discharged in the metering container are poured out during metering and dispensing.

(3) The opening of the valve body is a gap.

(4) The above-mentioned metering container can be replaced with metering containers of different capacities.

Description of drawings

Fig. 1 is an external perspective view showing a first embodiment of a check valve according to the present invention.

Fig. 2 is a longitudinal sectional view of its main part.

(a) of FIG. 3 is a longitudinal sectional view of a cylindrical body, (b) is a longitudinal sectional view of a valve body, and (c) is a longitudinal sectional view of a sheath body.

Fig. 4 is an explanatory diagram of a space partitioned by a valve body.

Fig. 5 is an explanatory diagram showing adjustment dimensions.

Fig. 6 is an explanatory diagram showing the operation.

Fig. 7 is an explanatory diagram showing a state in which the cover is closed.

(a) of FIG. 8 is a front view when one slit is provided, (b) is a plan view thereof, and (c) is a longitudinal sectional view showing a state in which the slit is opened.

(a) to (e) of FIG. 9 are explanatory diagrams showing application examples of slits.

Fig. 10 is an explanatory diagram showing an example of application to a bottle.

Fig. 11 is an explanatory diagram showing an example of application to a pouch.

Fig. 12 is an explanatory diagram showing application to a stand-up pouch.

FIG. 13 is an explanatory diagram showing a conventional technique.

FIG. 14 and FIG. 15 are explanatory diagrams when some functions are omitted.

16 and 17 are longitudinal sectional views of essential parts showing modified examples of the cylindrical body and the valve body.

Fig. 18 is a modified example of the cylindrical body and the valve body, wherein (a) is a longitudinal sectional view of main parts in a normal state, and (b) is a longitudinal sectional view of main parts in a discharge state.

(a) of FIG. 19 is a longitudinal sectional view of main parts in a normal state showing a modified example of a cylindrical body and a valve body, and (b) is a plan view of the valve body.

Fig. 20 is a longitudinal sectional view of main parts showing a modified example of a cylindrical body and a valve body, (a) showing a discharge state, and (b) showing a closed state.

(a) of FIG. 21 is a longitudinal sectional view of main parts showing a modified example of a cylindrical body and a valve body, and (b) is a plan view of the cylindrical body.

Fig. 22 is a longitudinal sectional view of main parts showing a discharge state in a modified example of a cylindrical body and a valve body.

Fig. 23 is a longitudinal sectional view of main parts showing a normal state in a modified example of the cylindrical body and the valve body in the second embodiment.

24 is a modified example of the cylindrical body and the valve body in the second embodiment, (a) is a longitudinal sectional view of main parts showing a discharge state, and (b) is a longitudinal sectional view of main parts showing a closed state.

25 is a modified example of the cylindrical body and the valve body in the second embodiment, (a) is a vertical sectional view of main parts showing a normal state, and (b) is a vertical sectional view of main parts showing a discharge state.

Fig. 26 is a conceptual diagram when the check valve of the present invention is applied to a container having a liquid metering function.

Fig. 27 is a perspective view showing a first embodiment of the container having a liquid measuring function of the present invention.

Fig. 28 is a longitudinal sectional view of main parts in a state where the cover is removed.

Fig. 29 is a longitudinal sectional view of main parts in a state where the cover is attached.

Fig. 30 is a perspective view of main parts showing the replacement state of the measuring container.

Fig. 31 is a perspective view showing a state of use.

Fig. 32 is a longitudinal sectional view of main parts showing a discharge state.

Fig. 33 is a longitudinal sectional view of main parts showing a measurement completion state.

Fig. 34 is a longitudinal sectional view of main parts showing a state of taking in outside air.

Detailed ways

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a perspective view showing the appearance of a first embodiment of the present invention. In FIG. 1 , 1 is a check valve body, 2 is a discharge port, and 3 is a container body. Fig. 2 is a longitudinal sectional view of main parts around the check valve main body.

As shown in (a), (b) and (c) of FIG. 3 , the check valve 2 is composed of a cylindrical body 4 , a valve body 5 , an outer skin body 6 , and a protective cover 7 shown in FIG. 2 . As shown in FIGS. 2 and 3 , the cylindrical body 4 is formed in a tapered shape so as to reduce fluid resistance at the end 8 on the container body side. Cylindrical body 4 also has the function of maintaining the shape of valve body 5, and is preferably made of a hard material that is not easily deformed.

As shown in FIG. 3( b ), the valve body 5 is made into a hollow shell shape, and a slit 9 is provided at its front end. The valve body 5 is formed of an elastic body such as rubber, and the gap 9 is normally sealed by the elastic force (restoration force) of the valve body 5 itself. However, when an external force is applied to the container body 3 by squeezing the container body 3 by hand, the container deforms under the external force, and the sealing of the slit 9 can be easily released under the action of the container internal pressure to form an opening.

As shown in FIG. 3( c ), an outer skin body 6 covering the valve body 5 is also provided. The outer skin body 6 has the function of limiting expansion and deformation of the valve body 5 . The shape of the outer skin body 6 is almost the same as that of the valve body 5, but at its front end, a normally open discharge port 2 is provided. The outer skin body 6 is preferably made of a more or less elastic material. The discharge port 2 cooperates with the protrusion 12 on the cover 11 shown in FIG. 2 , and the close contact between the two can prevent the content (liquid, semi-fluid, etc.) remaining in the discharge port passage 20 from contacting with air and oxidizing.

A flange 13 is provided on the outer surface of the outer skin body 6. As shown in FIG. The protective cap 7 is screwed to a thread provided on the outside of the cylindrical portion 14 of the container body 3 .

If it is not such a structure but a structure without a cylindrical body as shown in FIG. Open to create a gap between the valve body and the outer skin, and air will flow into the container body. In addition, in the case of a structure without the outer skin body 6 as shown in FIG. 15 , the valve body only expands, and the slit 9 hardly opens. Therefore, as shown in the present invention, the three functions of the cylindrical body 4, the valve body 5 and the outer skin body 6 must be organically combined.

As shown in FIGS. 3 and 4 , spaces A and B are respectively provided between the front end 15 of the cylindrical body 4 and the inner side 16 of the valve body 5 , and between the front end 17 of the valve body and the inner side 18 of the outer skin. Space A is the content stagnation area from the container body through the passage 19 of the cylindrical body 4. The larger the volume, the more the inner surface 16 of the valve body 5 will be squeezed with distributed force. The space B determines the amount of movement of the valve body 5 . The larger the height C in the vertical direction of the space B is, the larger the expansion of the valve body 5 is, and the larger the opening formed by the expansion of the slit 9 is. These spaces A, B, together with the passage diameter D and the discharge port diameter E of the cylindrical body 4 shown in FIG. The size of the external pressure on the body) adjustment.

The function of the check valve 2 of the present invention with the above structure is shown in FIG. 6 .

That is, when external pressure is applied to the container main body 3 by squeezing the container main body 3 by hand, the external pressure increases the internal pressure of the container, and the contents are squeezed out toward the discharge port 2 as shown by the long arrow in the figure. The extruded content enters the space A through the passage 19 of the cylindrical body 4 . Then, the pressure in the space A rises, and the inner surface 16 of the front end of the valve body 5 is pressed outward, so the space B shrinks while expanding until the front end 17 of the valve body contacts the inner surface 18 of the outer skin body 6 . At the same time, the slit 9 located at the front end of the valve body 5 opens, and the content flows out, and is discharged from the discharge port 2 at the front end of the outer skin body 6 .

When the external pressure of the container body 3 is removed, the slit 9 is closed by the elastic (restoration) force of the valve body 5, and the discharge stops. Since the valve mechanism, especially the valve body 5, is closed while being immersed in the contents, the , air will not enter the container body 3 side from the valve body 5 .

When not in use, as shown in FIG. 7 , when the cover 11 is closed, the protrusion 12 provided at the center of the cover 11 is in close contact with the front end of the discharge port 2 to block contact with air. By making such a structure, there is a space A inside the valve body 5, even if the valve body 5 is easily deformed toward the container body 3 side, since the pressure between the spaces A and B separated by the valve body 5 is balanced as much as possible, even if the valve body 5 is easily deformed toward the container body 3 side, the The 3 sides of the container body are pulled in, and the slit 9 is opened. As long as the balance is maintained, it will return to the normal state, and the slit 9 remains airtight. The cover 11 itself can be in addition to the fitting type shown in Figure 7, and can also be in all forms such as a hinged form, a screw type, etc. not shown in the figure, but no matter what form it is, it must be provided with a protrusion 12 in the center. Construction of blocked outlet 2.

As mentioned above, by adjusting the caliber D of the cylindrical body 4, the caliber E of the discharge port, and the spaces A and B, the contents discharged from the discharge port 2 can be freely controlled from dropping drop by drop to continuously flowing out. discharge method.

8( a ) to ( c ) respectively show the slit 9 provided at the front end of the valve body 5 . (a) is a front view when a slit 9 is provided. (b) is its plan view. (c) is a longitudinal sectional view of a state in which the slit is opened.

Figure 9(a) to (e) are top views of various forms of slits 9 .

In addition, the opening provided on the valve body 5 is not limited to the slit 9, as long as it has the function of automatically closing the opening due to the rise of the internal pressure of the container, and it can be an opening as described later. hole.

10 to 12 are examples of the application of the check valve 2 of the present invention on various container bodies 3 . Fig. 10 is an example applied to a plastic bottle, which is often used to hold shampoo, etc., and its container body 3 is deformable under external pressure. Figure 11 is an example applied to a wedge-shaped bag. Figure 12 is an example applied to a stand-up pouch. Figures 11 and 12 both show a bag-like container. In this way, the check valve of the present invention can be used on all types of containers that squeeze the container body 3 by hand to apply external pressure to generate internal pressure in the container body and discharge the contents. On the contrary, the present invention cannot be applied to containers whose container bodies are not deformed by external pressure, such as glass bottles.

16 to 20 show other embodiments of the check valve 2 of the present invention.

Figure 16 shows that there are 2 slits. FIG. 17 shows a structure in which the cylindrical body 4 and the valve body 5 are integrally formed. At this time, the whole body can be integrally formed with an elastic material such as rubber, or the cylindrical body 4 can be formed with a hard material such as plastic, and the elastic material of the valve body 5 can be used to cover the cylindrical body 4. Even if the whole body is formed of a soft material, as long as the cylindrical body part 21 is made thick enough, the deformation toward the inside can be suppressed. However, it is preferable that the cylindrical body part 21 is relatively hard. If the top with the opening can ensure that the opening is closed It is better to be softer if there is sufficient elasticity required by the skin.

Each figure of FIG. 18 shows that the passage 19 of the cylindrical body 4 is extended to the top which contacts the valve body 5, and it is bifurcated into two. At this time, the top portion 15 of the cylindrical body 4 is in close contact with the inner side 16 of the front end portion of the valve body 5 to block the opening of the passage 19 . Therefore, as a valve mechanism, this part and the slit 9 provided in the valve body 5 form a two-stage structure. That is, as shown by the arrow in Figure 18 (b), the content that is extruded from the container body 3 and comes through the passage 19 of the cylindrical body 4 pushes the valve body 5 up, and the front end 15 of the cylindrical body and the valve body A space A is formed between the inner sides 16 of the front end, and the valve body 5 is further pushed up by the internal pressure and expanded to expand the slit 9 , and then it is discharged from the discharge port 2 of the outer skin body 6 . Certainly, if only the former also can give full play to the function of valve, so, be located on valve body 5 also can be not slit 9 but opening hole, can decide according to the viscosity of used liquid.

Fig. 19 and Fig. 20 show the structure with discharge adjustment function. That is, when the valve and the discharge port are open, the discharge volume changes as the internal pressure of the container increases, but if the internal pressure of the container body 3 is accidentally increased, the contents will be ejected from the discharge port 2 . Therefore, in order to prevent this, a prevention mechanism is provided. Fig. 19(a) is a vertical sectional view in a normal state, and (b) is a top view of the valve body. Fig. 20(a) is a longitudinal sectional view in a discharging state, and Fig. 20(b) is a longitudinal sectional view in a closed state. Arrows all indicate the flow of the contents (liquid, semi-fluid, etc.).

That is, on the valve body 5, a protrusion 23 is provided with the opening 22 of the front end of the cylindrical body 4 towards the inside. In the normal state shown in FIG. The protrusions 23 of the body 5 are in close contact with each other, and the opening 22 of the passage 19 is blocked. As shown in Fig. 20(a), the content that is extruded due to the rise of the internal pressure of the container body 3 and comes through the passage 19 pushes up the protrusion 23 of the valve body 5, and the close contact between the two is released. Then, the gap is opened to flow out from here, flow out from the opening 24 provided around the protrusion 23 of the valve body 5 , and then be discharged from the discharge port 2 of the outer skin body 6 .

But when the internal pressure of the container body rose further, as shown in Figure 20 (b), the protrusion 23 of the valve body 5 was further pushed up, and the front end 17 of the valve body 5 and the lower end of the discharge port 2 of the outer skin body 6 were above it. 25 phase contact, the outlet 2 will be blocked.

With this configuration, the contents are only expelled at a certain internal pressure of the container body. That is, when the container body 3 is accidentally squeezed and unexpected external pressure is applied to the container body 3, the contents will not be discharged. Therefore, this configuration is very suitable when dripping of the contents is required, preventing continuous discharge.

In addition, the setting of the pressure range applied to the container body 3 that can discharge the contents, in addition to adjusting the diameter D of the passage 19 of the cylindrical body 4 shown in FIG. 5 , the diameter of the opening of the valve body 5, And outside the caliber E of the discharge port 2 of the outer skin body 6, the elastic force strength of the valve body 5, the distance from the upper end of the valve body 5 to the lower end of the discharge port of the outer skin body 6 can also be adjusted. At this time, if it is necessary to ensure the volume of the space B between the valve body 5 and the outer skin body 6, a protrusion may be provided on the top of the valve body 5.

21 and 22 show the valve mechanism formed by the cooperation of the protrusion 26 provided on the top of the cylindrical body 4 and the opening hole 27 provided on the valve body 5 . FIG. 21( a ) is a longitudinal sectional view in a normal state, and FIG. 21( b ) is a plan view of the cylindrical body 4 . Fig. 22 is a longitudinal sectional view of the discharge state.

Open holes 22 are provided around the protrusions 26 of the cylindrical body 4 . In the figure, four opening holes are provided, but any number may be provided.

As shown in FIG. 22 , the content squeezed out from the container body 3 (not shown) passes through the passage 19 of the cylindrical body 4 and presses the valve body 5 blocking the opening hole 22 from the inside. Then, the opening hole 27 of the valve body 5 which is in close contact with the protrusion 26 of the cylindrical body 4 is pushed up, a gap is formed between the two, and the contents are discharged from the outlet 2 of the outer skin body 6 .

23 to 25 show different embodiments.

In both, the valve body 5 can move in the space B between the cylindrical body 4 and the outer skin body 6 . In this embodiment, a spring 28 is provided between the valve body 5 and the outer skin body 6, and the valve body 5 and the cylindrical body 4 are in close contact under normal conditions.

The basic structure of the valve mechanism is the same as the aforementioned structures. That is, FIG. 23 shows that the protrusion 23 provided on the valve body 5 is in close contact with the front end opening 22 of the cylindrical body 4 . FIG. 25 shows that the protrusion 26 at the front end of the cylindrical body 4 is in close contact with the opening hole 27 of the valve body 5 .

Both are due to the rise of the internal pressure of the container body 3 and when the valve body 5 is pushed up by the content squeezed out, the valve body 5 slides against the spring 28 and opens, so the content flows out from here and then from the outer skin. 6 discharge outlet 2 discharge. Fig. 23 and Fig. 24 are the same as Fig. 19 example, when the internal pressure of the container body exceeds a certain level, the valve body 5 blocks the discharge port 2 of the outer skin body 6 to prevent discharge. Fig. 23 shows a normal state, Fig. 24 (a) shows a discharge state, and (b) shows a closed state.

FIG. 26 shows a structure in which the upper portion of the protective cover 7 is formed into a cup shape and the measuring portion 29 is provided. The contents discharged from the discharge port 2 can be metered. In this case, the metering portion 29 is preferably made of a transparent material.

In this example, after detaching the cap 11, the measuring portion 29 is turned upward, the container body 3 is squeezed, and a required amount is measured. Ideal for medicine, detergent containers.

Next, an embodiment in which the check valve of the present invention is applied to a container having a liquid metering function will be described.

Fig. 27 is a perspective view showing a liquid measuring container of the present invention. Among the figure, 30 is a liquid measuring container, 3 is a container body, 7 is a protective cover, 29 is a measuring container (hereinafter referred to as a cup), 31 is an air suction port, and 32 is a suction tube.

Fig. 28 is a longitudinal sectional view of the vicinity of the protective cover 7, which is an essential part of the present invention. In the inner central portion of the protective cover 7, a check valve 1 is provided in its concave portion, and the discharge port 2 at its front end is inserted into the opening 32 provided in the central part of the protective cover 7, and opens toward the cup 29.

The check valve 1 is inserted into the cylindrical member 14 , and the cylindrical member 14 fits into a concave portion inside the protective cover 7 . The combination of the protective cover 7 and the cylindrical member 14 may also be threaded. Suction tube 33 hangs down from the bottom of cylindrical part 14, and its front end stretches to the bottom of container body 3 for sucking up the liquid at the bottom of container body 3. The thickness (inner diameter) of the suction tube 33 is changed according to the viscosity of the liquid used. When it is a high-viscosity liquid, the inner diameter is thick, and when it is a low-viscosity liquid, the inner diameter is thin.

In FIG. 28 , 11 is a lid of a cup 29 . The cover 11 has a T-shaped longitudinal section, that is, a rod-shaped member 35 protrudes from the center of a disk-shaped member 34 . A step 36 is provided on the outer periphery of the disk-shaped member 34 , and the upper end 37 of the cup 29 is fitted into the step 36 as shown in FIG. 29 . The front end of the rod-shaped member 35 is tapered, and presses against the front end opening 2 of the check valve 1 to block the opening.

Cup 29 is screwed on the upper end of protective cover 7. The bonding method of protective cover 7 and cup 29 can also be used to fit except thread, but must guarantee that the liquid that is stored in cup 29 does not leak. For this purpose, it is also effective to use an O-ring. But cup 29 is not fixed, but can be unloaded. In this way, the cup 29 can be easily removed for cleaning. In addition, as shown in FIG. 30, it is preferable to replace the cup 29 with a different capacity according to the measured amount. Cup 29 is preferably made of transparent material, and is provided with scale, can measure required amount easily from the side like this.

As shown in FIG. 28 , an air intake port 38 is provided on the side surface of the protective cover 7 . In FIG. 28 , a through hole 39 extending from the side surface of the protective cover 7 toward the center is provided. A step 40 is provided inside the protective cover, and a gap 41 is provided between the outer periphery of the cylindrical member 14 . The through hole 39 opens toward the gap 41 .

The side opening of the through hole 39 has an inner diameter that increases at a certain depth, and the cylindrical member 42 is fitted in this portion, and the check valve 43 is inserted therein. In addition, the check valve 43 is prevented from coming off by the cover 44 . An air suction port 45 is provided at the center of the cover 44 .

The structure of the check valve 43 is simpler than that of the check valve 1 of the aforementioned discharge path, and is only the structure of the aforementioned valve body 5 . Of course, it may also have the same structure as the aforementioned check valve 1 . The suction port is closed when the pressure in the container body is positive, and opened when it is negative.

The suction port 38 is provided on the cover 7 in this embodiment, but it may also be provided on the container body.

Next, use of the liquid measuring container of the present invention having the above-mentioned structure will be described.

As shown in Fig. 31, the container body 3 is squeezed with fingers or the like to increase the internal pressure. Due to the rise in internal pressure, the content (liquid) enters the suction tube 32 and flows toward the discharge port. Then, as shown in FIG. 32 , the check valve 1 is opened to let the flow out into the cup 29 . At this time, only the check valve 1 on the discharge side is opened, and the check valve 43 on the suction side is closed. Continue to pressurize the container body 3 until the liquid level reaches the scale of the cup.

Fig. 33 shows the state where the required amount is measured in the cup. When the required amount is stored in the cup 29, the hands of the squeeze container body 3 are released, and when the external pressure applied on the container body 3 is eliminated, the check valve 1 is automatically closed by the elasticity of the valve body 5. Then, as shown in FIG. 34, the restoring force produced by the elasticity of the container body 3 makes the container body become negative pressure. At this time, the check valve 43 of the suction port 38 is opened, and the outside air flows into the container body. When the internal pressure of the container body is balanced with the air pressure outside the container, the check valve 43 of the suction port 38 is automatically closed by its own elastic force. Then, just pour out the liquid in the cup.

As a result, when the measured content is discharged (dispensed) from the cup, an excess amount will not flow out from the discharge port 2, and even if the container body is accidentally tipped over, the content will not flow out.

Industrial Applicability

Since the present invention has the above configuration, it is possible to provide a check valve suitable for dripping contents (liquid, semi-fluid, etc.), and a container having the check valve and having high storage stability.

That is, it is extremely easy to control the pressure applied to the container so that the contents drip out. Moreover, since the parts of the valve mechanism are not exposed, the valve mechanism will not be subjected to external pressure, etc., the function of the check valve can be ensured, and the air can be prevented from flowing back into the container body.

Therefore, it is very suitable for bottles containing anaerobic substances (food, cosmetics, chemicals, etc.) that should not come into contact with the air.

The discharge amount of the content can be adjusted freely according to the viscosity.

In addition, the liquid container having a metering function according to the present invention can be applied to various containers, and it can be applied to various containers as long as it is a flexible liquid container. The discharge amount of the contents can be easily adjusted, and the metering can be performed easily.

Moreover, even if the container body is accidentally pressurized, the contents will not be discharged, so more than the metered amount will not be discharged from the container body, and the metering accuracy is high.

Also, since the measuring cup can be removed for washing, it is hygienic.

Claims (19)

1. boiler check valve is characterized in that, is provided in a side of the valve of fluid container discharge orifice, have cylindrical body, cover this cylindrical body valve body, cover the crust body of this valve body; Above-mentioned cylindrical body has the path of perforation; Above-mentioned valve body is made by elastomeric material, has peristome near its front end; Above-mentioned crust body has peristome at its leading section.

2. boiler check valve is characterized in that, is provided in a side of the valve of fluid container discharge orifice, have cylindrical body, cover this cylindrical body valve body, cover the crust body of this valve body; Above-mentioned cylindrical body has the path of perforation; Above-mentioned valve body has peristome near its front end; Above-mentioned crust body has peristome at its leading section; This boiler check valve also has the over cap that the peristome that only makes the crust body exposes.

3. boiler check valve as claimed in claim 1 or 2 is characterized in that, in the discharge direction of fluid, is provided with the space between the front end of cylindrical body and crust inner body surface, and valve body will be isolated before and after this space.

4. as each described boiler check valve in the claim 1 to 3, it is characterized in that valve body is made by elastic body, and near the peristome that is located at its top is the slit, mouth is being closed under normal conditions by the elastic force of valve body self in this slit, removes airtight in container under the pressure effect and opening

5. boiler check valve as claimed in claim 4 is characterized in that the slit is formed by a plurality of notch combinations.

6. as each described boiler check valve in the claim 1 to 5, it is characterized in that, form cylindrical body and valve body.

7. as each described boiler check valve in the claim 1 to 3, it is characterized in that, the upper end of cylindrical body and the inner face of valve body become coadapted shape, make path branch in cylindrical body of cylindrical body, and opening is set at the top of avoiding valve body openings portion position, the peristome closure of valve body under normal conditions, the upper end face closed contact of the peristome of cylindrical body and cylindrical body and obturation, when press in the container liter, when valve body expands towards the discharge orifice direction, both closed contacts are removed, the peristome of valve body opens, and can discharge content.

8. as each described boiler check valve in the claim 1 to 3, it is characterized in that, the upper end of cylindrical body and the inner face of valve body become coadapted shape, have in the inside top of valve body and to cooperate with the passage opening portion of cylindrical body and, around this projection, have peristome, under normal conditions its projection of blocking, the projection of valve body is blocked the peristome of cylindrical body, when press in the container liter, the valve body projection is by when the discharge orifice direction pushes, path can be discharged content by opening.

9. as each described boiler check valve in the claim 1 to 3, it is characterized in that, the upper end of cylindrical body and the inner face of valve body become the shape that cooperatively interacts, be provided with towards the outstanding projection of discharge orifice direction at the top of cylindrical body, around it, be provided with the opening of path, has the opening that cooperates with the projection of cylindrical body and path is blocked at the top of valve body, under normal conditions, the projection of cylindrical body is blocked the peristome of valve body, but when press in the container liter, when valve body expands towards the discharge orifice direction, path can be discharged content by opening.

10. as each described boiler check valve in the claim 1 to 3, it is characterized in that, the upper end of cylindrical body and the inner face of valve body become the shape that cooperatively interacts, have in the inside top of valve body and to cooperate with the passage opening portion of cylindrical body and its projection of blocking, around this projection, be provided with peristome, valve body can move in the discharge direction between cylindrical body front end and crust body inboard, between valve body and crust body, be provided with the spring that under normal conditions valve body is suppressed towards the direction that is pressed on the cylindrical body, under normal conditions, the projection of valve body is blocked the peristome of cylindrical body, when owing to press that lift valve body projection is revolted above-mentioned spring in the container when the discharge orifice direction moves, path can be discharged content by opening.

11. as each described boiler check valve in the claim 1 to 3, it is characterized in that, the upper end of cylindrical body and the inner face of valve body become the shape that cooperatively interacts, be provided with towards the outstanding projection of discharge orifice direction at the top of cylindrical body, around it, be provided with the opening of path, has the opening that cooperates and block path with the projection of cylindrical body at the top of valve body, valve body can be between the front end of cylindrical body and crust body inboard moves discharging direction, between valve body and crust body, be provided with under normal conditions valve body court is pressed on the spring that the direction on the cylindrical body is suppressed, under normal conditions, the projection of cylindrical body is blocked the peristome of valve body, but when pressing liter owing in the container, valve body is revolted above-mentioned spring when the discharge orifice direction moves, path can be discharged content by opening.

12. as each described boiler check valve in the claim 7 to 11, it is characterized in that, the opening of valve body is opening before the external pressure that puts on container reaches a certain size, content is discharged from discharge orifice, when external pressure has surpassed a certain size, the medial surface closed contact of the top and crust body of valve body is blocked the opening of valve body, makes to discharge to stop.

13. liquid container is characterized in that, has the boiler check valve of each record in the claim 1 to 11.

14. the liquid container with boiler check valve as claimed in claim 13 is characterized in that, container is the bottle made from flexible material.

15. the liquid container with boiler check valve as claimed in claim 13 is characterized in that, container is that little satchel describes device.

16. the liquid container with boiler check valve as claimed in claim 13 is characterized in that, container is vertical pouch.

17. have the liquid container of boiler check valve, have the discharge orifice of discharging content, it is characterized in that be provided with check valve at this discharge orifice, that this check valve has is closed under normal conditions, owing to press in the container and rise and open peristome; Discharge front end at this liquid container has measuring container, the lid that has the band air suctiton inlet at peristome, this air suctiton inlet has check valve, that this check valve has under normal conditions is closed, open peristome under the suction function in container, divide timing in metering, when distributing the content that temporarily is discharged in the measuring container, can be from the content of the amount more than the amount of outflow metering in the vessel.

18. have the liquid container of boiler check valve, have the discharge orifice of discharging content, it is characterized in that, be provided with check valve at this discharge orifice, this check valve have coherent road all cylindrical body, cover the valve body of this cylindrical body and cover the crust body of this valve body; Above-mentioned valve body is made by elastomeric material, near its front end, have under normal conditions closed, owing to press in the container and rise and open peristome; Above-mentioned crust body has peristome near its front end; Discharge front end at liquid container has measuring container, the lid that has the band air suctiton inlet at peristome, this air suctiton inlet has check valve, this check valve is made by elastomeric material, have near its front end under normal conditions closed, in container open peristome under the suction function, in a single day in metering distributes, when distributing the content of discharging in measuring container, can from vessel, not flow out the content of the amount more than the amount of measuring.

19. the liquid container with boiler check valve as claimed in claim 18 is characterized in that the peristome of valve body is the slit.

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