JPH0889600A - Preserving vessel for tennis ball - Google Patents

Abstract

PURPOSE: To provide a preserving vessel for tennis ball with which the air pressure of a tennis ball is prevented from being reduced and the service life of the tennis ball can be prolonged. CONSTITUTION: Concerning a vessel 1 equipped with volume for housing a lot of rubber tennis balls and composed of a material not to pass air so as to preserve tennis balls, this vessel is provided with an opening/closing lid 2 for keeping air tightness inside the vessel 1 in the case of closing an opening part 1a by opening/closing the opening part 1a at the opening part 1a formed at one part of the vessel 1 so as to put in 7 out the tennis balls, a valve 4 for injecting air so as to increase pressure inside the vessel 1 by injecting air from the outside of the vessel 1, and a valve 5 for releasing air so as to decrease pressure inside the vessel 1 by opening the valve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tennis ball storage container used for preventing a decrease in air pressure of a tennis ball.

[0002]

2. Description of the Related Art A tennis ball used in a hard tennis is usually made by applying a pressure of 1.8 atm to a hollow rubber sphere, and a felt is attached to the surface of the sphere.

In such a tennis ball, the internal air pressure gradually decreases with the passage of time due to the characteristics of rubber. Therefore, it is usually set to about 2.0 atm in an airtight can. It is sold under pressure.

However, when the tennis ball is used, once it is taken out of the can, the air pressure is gradually reduced thereafter, and the air pressure is further reduced by the actual use in the tennis game. When the air pressure of the tennis ball decreases, the playing performance naturally deteriorates, and in general, the tennis ball becomes unsuitable for a game or the like after being used for about 10 days.

For example, if the felt on the surface of the tennis ball is worn out and becomes unsuitable for use before the proper air pressure is lost due to the frequent use of the tennis ball, the tennis ball is said to have fulfilled its function. be able to.

[0006]

However, when the frequency of use of the tennis ball is not so high, the felt on the surface of the tennis ball is not worn, and the air pressure of the tennis ball which can be used sufficiently decreases. It often becomes unsuitable for use, and in such a case the tennis ball has to be discarded, which is a very economical problem. Was a challenge.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and a storage container for a tennis ball which can prevent a decrease in the air pressure of the tennis ball and extend the service life of the tennis ball. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided a storage container for a tennis ball which stores a tennis ball made of an air-impermeable material having a volume capable of storing a large number of rubber tennis balls. A container for
An opening and closing lid that can open and close the opening formed in a part of the container and that holds the airtightness inside the container when the opening is closed, The structure is provided with an air injection valve for injecting air from the outside to increase the pressure in the container and an air bleeding valve for decreasing the pressure in the container by opening the valve. At this time, the opening / closing lid is slidable on the inner wall of the opening of the container, and the guide for opening / closing the opening / closing lid is formed on the inner wall of the opening of the container to dispose the opening / closing lid inside the container. The opening / closing lid is configured to come into close contact with the inner wall of the opening of the container when the pressure inside the container is made higher than the pressure outside the container by closing the opening with the opening / closing cover.
As a configuration in which a sealing material is provided in the close contact portion where the opening and closing cover closes the opening and the inner wall of the opening of the container comes into close contact when the pressure inside the container is made higher than the pressure outside the container,
As a fourth aspect, an air pressure gauge for displaying the pressure in the container is provided, as a fifth aspect, a small pressure device for increasing the pressure in the container is provided, and as the sixth aspect, the inside of the container is provided. A storage space for storing the tennis balls and a non-storage space for storing the tennis balls, which is partitioned by a partition plate having air permeability, and the container has a spherical shape according to claim 7. As a configuration, a wheel for movement is provided outside the container, and the above configuration is a means for solving the problem.

[0009]

In the storage container for the tennis ball according to the first aspect of the present invention, with the above structure, if the pressure inside the container is maintained at the same level as the prescribed air pressure of the tennis ball, This will prevent a decrease in the air pressure of the tennis ball, and even for a tennis ball with an air pressure lower than the specified air pressure, the air pressure of the tennis ball will be restored to the specified ball pressure if the pressure inside the container is set higher. As a result, the service life of the tennis ball is extended.

In the storage container for the tennis ball according to the second aspect of the present invention, by adopting the above-mentioned constitution, when the pressure inside the container is increased, the opening / closing lid is attached to the inner wall of the container by the pressure inside the container. Since they are pressed against each other and come into close contact with each other, the airtightness of the container is maintained with a very simple structure.

In the tennis ball storage container according to the third aspect of the present invention, a sealing material is provided in the close contact portion where the open / close lid and the inner wall of the opening of the container are in close contact with each other, whereby higher airtightness is ensured. Become.

In the tennis ball storage container according to the fourth aspect of the present invention, the pressure inside the container can be adjusted while observing the air pressure gauge, and the internal pressure of the container can be easily set to a desired pressure.

With the tennis ball storage container according to the fifth aspect of the present invention having the above structure, it is not necessary to inject air from the outside.

In the storage container for a tennis ball according to claim 6 of the present invention, when the inside of the container is filled with tennis balls, the pressure of the tennis ball is sufficiently increased even if the pressure in the container is increased. However, a certain space is always secured inside the container by having a storage space that stores the tennis balls and a non-storage space that does not store the tennis balls, which is partitioned by a breathable partition plate inside the container. If the pressure in the container is increased, the pressure of the tennis ball will be sufficiently increased.

In the tennis ball storage container according to the seventh aspect of the present invention, by making the shape of the container spherical, the strength of the container becomes high.

In the tennis ball storage container according to the eighth aspect of the present invention, by providing a moving wheel on the outside of the container, it becomes easy to move the tennis ball storage container while playing tennis.

[0017]

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

FIG. 1 is a front explanatory view (FIG. 1 (a), a side explanatory view (FIG. 1 (b))) and a top explanatory view showing an embodiment of a storage container for a tennis ball according to the present invention. 1 (c))
FIG. 2B is a cross-sectional view taken along the line AA of FIG. 1C (FIG. 1D).

In FIG. 1, a container 1 is an internal hollow sphere made of a material that does not allow air to pass through, and a circular opening 1a for taking in and out a tennis ball is formed in a ceiling portion thereof. In order to open / close the opening 1a, an opening / closing lid 2 formed in a spherical shape corresponding to the shape of the inner wall surface of the container 1 is slidably contactable with the inner wall surface of the container 1.
Is provided.

Further, as shown in FIG. 1 (d), the container 1
A guide 1d for opening and closing the opening / closing lid 2 is formed in a portion connected to the inside of the opening 1a.

On the other hand, the fitting 9 outside the container 1 is supplied with air from the outside of the container 1 to increase the pressure inside the container 1 and an air injection valve 4 and the valve is opened to open the pressure inside the container 1. An air bleeding valve 5 for lowering is provided,
It communicates with the inside of the container 1, respectively.

Further, similarly to the air injection valve 4 and the air bleeding valve 5 described above, the fitting 9 is provided with an air pressure gauge 6 for displaying the pressure in the container 1.

As shown in FIG. 1 (d), the inside of the container 1 is partitioned by a partition plate 1e having air permeability, and a storage space 1b for storing a tennis ball and a non-storage space 1c for storing a tennis ball are not provided. Are formed.

The inside of the container 1 is divided into a storage space 1b and a non-storage space 1c, because when the inside of the container 1 is filled with tennis balls, the pressure inside the container 1 is sufficiently increased. Since the pressure of the tennis ball is not increased, by forming the non-accommodating space 1c, a certain space is secured inside the container 1 and the pressure of the tennis ball can be increased to a desired pressure.

Further, in this embodiment, the volume of the storage space 1b for storing the tennis balls is set so that about 30 to 40 tennis balls can be stored.

On the other hand, at the bottom of the container 1, two wheels 3 for moving are provided and a handle 7 is provided. With such a structure, the tennis ball storage container can be easily moved during playing of a tennis game or the like.

Next, a method of using the above-mentioned storage container for tennis balls will be described.

First, the opening / closing lid 2 is opened to store the tennis ball in the container 1, and then the opening / closing lid 2 is closed. Then, air is injected from the air injection valve 4 to increase the pressure inside the container 1. At this time, the desired air pressure is adjusted while observing the value indicated by the air pressure gauge 6.

As a result, when the pressure inside the container 1 becomes higher than the atmospheric pressure of the outside, the opening / closing lid 2 comes into close contact with the inner wall of the opening 1a of the container 1 and the airtightness inside the container 1 is maintained.

Further, when the opening 1a is closed by the opening / closing lid 2 and the pressure inside the container 1 is made higher than the pressure outside the container 1, the opening / closing lid 2 and the inner wall of the opening 1a of the container 1 are tightly sealed. If a material is provided, more reliable air tightness can be obtained.

Here, in order to inject air from the air injecting valve 4, a generally used inflator for injecting air into tires of bicycles, automobiles, etc. can be used.
If the structure of the air injection valve 4 is adapted to such an inflator, it can be made more versatile.

Further, it is possible to increase the pressure in the container 1 by providing the container 1 with a pressurizing device such as a small compressor.

To take out the tennis ball from the container 1, first, the air vent valve 5 is opened to lower the pressure in the container 1. By reducing the pressure, the internal pressure causes the opening 1a
The open / close lid 2 that is pressed against and is in close contact with is separated from the opening 1a by its own weight, and the open / close lid 2 is opened along the guide 1d to take out the tennis ball inside.

[0034]

As described above, according to the storage container for a tennis ball according to claim 1 of the present invention, with the above structure, the container is kept at a pressure substantially equal to the prescribed air pressure of the tennis ball. If the internal pressure is maintained, it is possible to prevent a decrease in the air pressure of the tennis ball, and even for a tennis ball with an air pressure that is lower than the specified air pressure, set the pressure in the container to a higher level to play tennis. It is possible to restore the air pressure of the ball to the prescribed air pressure, and as a result, the excellent effect of extending the service life of the tennis ball can be obtained.

According to the second aspect of the present invention,
When increasing the pressure inside the container, the opening and closing lid is pressed against the inner wall of the container by the pressure inside the container and adheres closely, making it possible to ensure the airtightness of the container with a very simple structure, As a result, the excellent effect of facilitating the implementation is obtained.

According to the third aspect of the present invention,
By providing the sealing material in the close contact portion where the open / close lid and the inner wall of the opening of the container are in close contact with each other, higher airtightness can be secured, and a highly reliable storage container for a tennis ball can be obtained. Be brought.

With the configuration according to claim 4 of the present invention,
The pressure inside the container can be adjusted while watching the air pressure gauge, and the internal pressure of the container can be easily set to a desired pressure.

According to the fifth aspect of the present invention,
Since it is not necessary to inject air from the outside, it is possible to obtain a more convenient storage container for a tennis ball.

According to the sixth aspect of the present invention,
If the inside of the container is filled with tennis balls, the pressure of the tennis ball will not be sufficiently increased even if the pressure inside the container is increased, but with the above configuration, a constant space is always created inside the container. By ensuring the pressure, the pressure of the tennis ball can be sufficiently increased by increasing the pressure in the container.

According to the seventh aspect of the present invention,
By making the shape of the container spherical, it is possible to improve the strength of the container.

With the configuration according to claim 8 of the present invention,
By providing the moving wheels on the outside of the container, it is possible to easily move the storage container for the tennis ball during playing tennis or the like.

[Brief description of drawings]

1 is a front explanatory view ((a) of FIG. 1), a side explanatory view ((b) of FIG. 1), an upper explanatory view (of FIG. 1) showing an embodiment of a storage container for a tennis ball according to the present invention. (C)) and FIG.
FIG. 2C is a cross-sectional view taken along the line A-A of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 1a Opening (ball entrance / exit) 1b Storage space 1c Non-storage space 1d Guide 2 Open / close lid 3 Wheels 4 Air injecting valve 5 Air bleeding valve 6 Air pressure gauge 7 Handle 8 Partition plate 9 Attachment

Claims (8)

[Claims] 1. A container for storing a tennis ball, which is made of an air-impermeable material having a volume capable of accommodating a large number of rubber tennis balls, the tennis ball formed in a part of the container. It is equipped with an opening and closing lid that can open and close the opening and closing the opening and keep the airtightness inside the container when closing the opening, and inject air from the outside of the container to reduce the pressure inside the container. A storage container for a tennis ball, comprising an air injection valve for raising and an air bleeding valve for lowering the pressure in the container by opening the valve. 2. The opening / closing lid is slidable on the inner wall of the opening of the container when the opening / closing lid is opened and closed, and the guide for opening / closing the opening / closing lid is formed on the inner wall of the opening of the container. The opening / closing lid is arranged inside the container, and when the opening / closing lid closes the opening to make the pressure inside the container higher than the pressure outside the container, the opening / closing lid closely contacts the inner wall of the opening of the container. Claim 1
The storage container for a tennis ball described in. 3. A sealing material is provided at a close contact portion where the opening / closing lid and the inner wall of the opening of the container are in close contact when the opening is closed by the opening / closing lid and the pressure inside the container is made higher than the pressure outside the container. The storage container for the tennis ball according to claim 2. 4. The storage container for a tennis ball according to claim 1, further comprising an air pressure gauge for displaying the pressure inside the container. 5. The storage container for a tennis ball according to claim 1, further comprising a compact pressurizing device for increasing the pressure inside the container. 6. The container according to claim 1, wherein the inside of the container is a storage space for storing a tennis ball partitioned by a partition plate having air permeability and a non-storage space for storing a tennis ball. Storage container for the described tennis ball. 7. The storage container for a tennis ball according to claim 1, wherein the container has a spherical shape. 8. The storage container for a tennis ball according to claim 1, further comprising a moving wheel provided outside the container.