JPS6330368Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a pot with an air pump, and improves the efficiency of the pump.

In a conventional pot with an air pump, as shown in Fig. 1, by pushing down the pressure plate 1 by hand, the valve 3 of the air pump chamber 2 is first closed.
When pressed down further, the air in the air pump chamber 2 is compressed, and air is sent into the pot 5 from the vent at the bottom of the air pump chamber 2 through the inner stopper 4, pressurizing the liquid level 6 and pouring the air inside the pot 5 through the spout 7. It was designed to pour out liquid. In addition, pressure plate 1
In the return stroke after pressing down, the pressurizing force is removed and the pot is restored by the force of the spring 8, but at the same time, the air compressed into the pot 5 is also released to the atmosphere.

The conventional pot with an air pump as described above has the disadvantage that when the amount of liquid inside the pot decreases, the flow of the liquid becomes poor. The reason for this is that when the liquid level 6 in the pot 5 decreases, the lift to the spout 7 increases, which requires more pressure to pressurize the liquid level 6, and the empty volume in the pot 5 decreases as the liquid level 6 decreases. As a result, the rate of increase in the air pressure inside the pot 5 decreases when the same volume of air is fed from the air pump chamber 2.

This invention aims to solve the above drawbacks with a simple structure.

The basic idea is that the air pressure compressed into the pot is continuously pumped out until a certain amount of liquid is pumped out (instead of being released to the atmosphere every time the pump operates back and forth like in conventional pots). If you hold it in place and release the pressure when the liquid has finished pumping out, the internal pressure will be released to the atmosphere.

The pump structure of this invention will be explained based on FIG. 2. A vent hole 10 is provided in the approximate center of the lower substrate 9 forming a part of the air pump chamber 2, and a check valve that closes the vent hole 10 is provided. 11 is provided between the lower surface of the lower substrate 9 and the inner stopper 4 to prevent air from flowing back into the air pump chamber 2 from the inside of the pot. The vent 10 has a plurality of concentric holes, and the check valve 1
1 is formed into a ring shape so as to close the vent hole 10. The check valve 11 is made of a silicone rubber plate or the like with a thickness of about 1 mm, and the distance from the valve seat is about 1 mm, and its operating amount is regulated by a gasket 12. On the other hand, an opening serving as the proximal end of a conduit 13 for releasing the air pressure inside the pot from the check valve 11 is provided at the bottom of the check valve 11, and the tip of the conduit 13 is connected to the pressure plate 1 at the top of the pot. It is provided extending almost to the center, and is normally open to the atmosphere, with a shutoff valve 14 provided at the opening. An opening/closing operation section for opening and closing the opening/closing tap 14 is exposed on a part of the pressing surface side of the pressure plate 1. Further, the opening/closing valve 14 is urged toward the opening side with a force smaller than the supporting pressure of the pressure plate 1. The opening/closing valve 14 is made of rubber with a diaphragm on its outer periphery, and opens the tip of the conduit 13 with moderation when a certain pressure, which is smaller than the valve 3 of the air pump chamber 2 which is urged upward by the spring 8, is exceeded. It is configured to close the section. On the other hand, the conduit 13 is made of a flexible rubber pipe so as not to inhibit the vertical movement of the pressure plate 1. Note that the conduit 13 does not necessarily need to be flexible over its entire length as long as it does not hinder the vertical movement of the pressure plate 1; for example, only the middle portion may be flexible.

Next, to explain the operation of this device, in order to pour out the liquid inside the pot, when pressing down the pressure plate 1, the stopcock 14 is pushed first.
Since the operating pressure of 4 is set lower than the supporting pressure of the pressure plate 1, the stopper 14 operates before the pressure plate 1 starts moving and closes the tip opening of the conduit 13. When further force is applied, the tip opening of the conduit 13 remains closed, and as the pressurizing plate 1 descends, the valve 3 is closed and the air in the air pump chamber 2 is compressed and passes through the vent 10 to prevent it from returning. The valve 11 is pushed down and the liquid is fed into the pot through the inner stopper 4 and the internal liquid is poured out.

Next, in the return stroke after pressing the pressure plate 1, the compressed air in the pot pushes down the check valve 11 and closes the vent 10, so the pressure in the pot is maintained and hardly decreases. On the other hand, new air is introduced into the air pump chamber 2 by opening the valve 3. In this return stroke, the opening/closing valve 14 moves to the pressure plate 1 as described above.
Since the operating pressure is set lower than the supporting pressure of the pressure plate 1, even when the pressure plate 1 returns to its original position (the position before pressing), it will not open or close unless you remove your hands from the pressure plate 1 and the opening/closing valve 14. The stopper 14 can be maintained in a closed state.

As mentioned above, as long as the pressurizing operation is repeated without taking your hands off the pressurizing plate 1 and the stopcock 14, the air pressure sent into the pot will not be released and will be maintained, so the second pressurizing operation From then on, the amount of liquid to be poured out increases, and is improved to the amount when the inside of the pot is almost full.

This invention not only improves pump efficiency as described above, but also has important structural features to achieve that goal.

First, the operator must be able to accurately determine at which position the stopper 14 will be opened during the return stroke of the pressure plate 1.

The reason for this is, as is clear from the above explanation, that when the stopper 14 is opened, the pressure inside the pot is released. In this respect, in this invention, the operating pressure of the stopcock 14 is smaller than the supporting pressure of the pressure plate 1, so the stopcock will not be opened unless the pressure plate 1 and the stopper 14 are released. In other words, the major feature is that whether or not you release your hand from the pressure plate 1 can be used as a criterion for opening and closing the stopcock 14, and since you can tell by the feel of your hand, it is easier to inject liquid into your eyes. The status can be monitored and operability can be greatly improved. According to this invention, when pressing, the opening/closing stopper 1
4 is completed before the pressure plate 1 starts moving, so it can be said that the operation of the stopper 14 is independent of the movement of the pressure plate 1.

If the opening and closing of the opening/closing valve 14 were to be linked with the movement of the pressure plate 1, it would be impossible to accurately determine at what position in the movement of the pressure plate 1 the opening/closing valve 14 would open or close, and each pressing operation would The pressure inside the pot may or may not be released, resulting in an extreme drop in operability and thus failing to achieve the purpose of this invention.

The second feature is that the conduit 13 is flexible. The vertical movement of the pressure plate 1 due to pressure is due to the fitting backlash of the pressure plate 1,
Depending on the position of the press, the pressure plate 1 may be pressed while being tilted, resulting in very unstable movement.
In order to guide air pressure without interfering with the unstable movement of the pressure plate 1 and maintaining airtightness, a flexible conduit 13 that has a high degree of freedom in movement and is reliable in airtightness is needed. It can be said that it is the most suitable to use. Normally, we would not want to take the trouble to introduce air pressure to the pressurizing plate part that moves unstable like this, but this structure has to be adopted in order to achieve the purpose of the present invention.

The third feature is that the compressed air sent into the pot is an elastic body, so if the internal pressure of the pot is not released even after stopping the air supply, the liquid will continue to be poured out to some extent. do. This is a drawback when dispensing a fixed amount of liquid, and in this respect, this invention is equipped with a stopcock 14 on one part of the pressure plate, and by releasing the pressure on the stopper 14, the conduit can be Since the tip of the pot 13 is opened, the internal pressure of the pot can be released instantly, and the drained liquid can be drained easily. If the stopper 14 is installed in a separate location from the pressure plate 1, you may forget to leave the stopper 14 open while it is closed, and in this case, if there is hot water inside the pot, There is a risk that the hot water inside will be discharged due to steam pressure, but according to this invention, the stopcock 14 is provided on the pressure plate 1, so when you release your hand from the pressure plate 1, the stopcock 1 will open.
4 is always opened, so there is no risk of forgetting to open the stopcock 14.

As described above, this invention not only improves the pump efficiency of a pot with an air pump, but also improves operability and safety.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of a conventional pot, and FIG. 2 is a sectional view showing the structure of the pump portion of this invention. 1... Pressure plate, 2... Air pump chamber,
3...Valve, 4...Inner plug, 5...Pot, 6...Liquid level, 7...Spout, 8...Spring, 9...Lower board, 10...Vent, 11...Return check valve, 1
2...Packing, 13...Conduit, 14...Opening/closing valve.

Claims (1)

[Scope of Claim for Utility Model Registration] In a pot equipped with an air pump, which manually pressurizes a pressure plate to send air inside the air pump chamber into the pot, and uses the air pressure to pour out the liquid inside the pot. A check valve is provided in the air passage leading from the air pump chamber to the inside of the pot, and the proximal end of the conduit is opened on the side of the pot rather than the check valve of the air passage, and the tip of the conduit is connected to the atmosphere at the pressurizing plate portion. the conduit is flexible; an opening/closing stopper is provided at the atmosphere side opening of the conduit; an opening/closing operation part of the opening/closing stopper is exposed on the pressing surface side of the pressure plate; The opening/closing valve has a pump structure of a pot with an air pump that is biased toward the opening side with a force smaller than the supporting pressure of the pressure plate.