JPH0423581Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a table tennis ball, particularly one used only for practice.

<Prior art> Conventionally, this type of table tennis practice ball has been provided with several band-shaped colored streak patterns of two or more different colors so as to go around the spherical surface, or a hemispherical piece with the band-shaped colored streak pattern that goes around the sphere. The direction of the strip pattern was orthogonal.

On the other hand, when practicing table tennis, it is important not only to hit the ball quickly and accurately with a racket and to serve by applying rotation to the ball, but also to determine the direction of rotation of the ball hit by the opponent and hit back in a corresponding manner. That's true.

However, in the former case, since the band-shaped colored part is continuous in a circumferential manner,
It is very difficult to determine the direction of rotation,
In the latter case, it is difficult to distinguish between the continuous circumferential part and the semicircular part, and in any case, beginners are not trained to see the rotation of the ball, and it is difficult to accurately determine the direction of rotation of the ball from the opponent. I couldn't make a decision and hit back.

<Problems to be Solved by the Invention> The problems to be solved by the invention are to train practitioners to see the rotation of the ball and to make the rotation easier to see.

<Means for solving the problems> The technical means taken by the present invention to solve the above problems is to provide a plurality of semicircular colored strips approximately in parallel on the hemisphere of the ball, and color the strips on both hemispheres. approx.
They are joined at a 90 degree angle.

<Function> In the present invention, semicircular colored strips are joined at an angle of about 90 degrees, making it easy to identify the direction and speed of rotation of the ball.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

As is well known in this technical field, the ball body A is formed by joining together two hemispheres a and a made of celluloid, and a semicircular strip-shaped colored part is formed on the surface of the hemispheres a and a. A plurality of hemispheres 1 are provided substantially in parallel, for example, in the form of vertical or horizontal stripes, and the two hemispheres a, a are joined so that the colored band parts are shifted by about 90 degrees.

The colored band portion 1 has a so-called striped pattern in which a plurality of semicircular bands are provided in parallel on the surface of the two hemispheres a, a that constitute the ball body A, and the color of the ball body A is different from the color of the ball body A. A different color can be provided by printing, etc. (Fig. 1), or a pigment may be partially mixed directly into the celluloid constituting the ball body A to provide it at a stage before the ball body A is molded into a spherical shape (Fig. 2). ),
Its shape is formed in a semicircular striped pattern on the surface of the hemisphere, and when both hemispheres a and a are joined, the band-shaped colored parts 1 are shifted about 90 degrees perpendicularly without overlapping, and one side has a vertical striped pattern. and the other side to form horizontal stripes.

The ball body A shown in FIG. 1 is made by joining a hemisphere a having a semicircular colored strip 1 printed on its entire surface as described above, and dividing the surface of the ball body A into two hemispherical parts.

The one shown in Figure 2 is made by joining two hemispheres made by laminating and molding celluloid without pigments and celluloid with pigments mixed in alternately. This shows a case where the two strip-shaped colored parts are not exactly parallel to each other due to the difference.The hemisphere a that formed the strip-shaped colored part 1 is joined, and the circumferential direction showing the opposing semicircles is 90 They are joined in a misaligned state, that is, in opposite directions.

In this case, the opposing colored parts 1, 1 may have different colors.

Therefore, although it is easy to form a band-shaped colored part in the former case, there is a risk that the band-shaped colored part will peel off if used for a long period of time. Regarding this point, in the latter case, the band-shaped colored part will not peel off even after long-term use, but it may become band-shaped due to local differences in elongation rate that occur when molding into a hemispherical shape.

<Effects of the invention> The present invention is a table tennis ball formed by joining two hemispheres, and the hemispheres are provided with a plurality of semicircular colored strips approximately parallel to each other, and the colored strips of both hemispheres are Because the structure is made by joining them at an angle of about 90 degrees,
The colored stripes are not continuous around the circumference, but instead form a semicircular striped pattern, and the strips are orthogonal, with one side being vertical stripes and the other side being horizontal stripes, so the rotation of the ball hit by the opponent. This makes it easy to identify the direction and rotational speed. Therefore, even beginners can make accurate judgments and hit back in the appropriate manner, and it also allows practitioners to practice observing the rotation of the ball. By looking at it, you will be able to identify the direction of rotation of the ball.

Moreover, since you can see at a glance the degree of rotation of the ball you hit, such as a serve or receive, you can improve your practice on the side that applies rotation.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a table tennis practice ball showing an embodiment of the present invention, Fig. 2 is a perspective view showing a modification of the shape of the colored part, and Fig. 3 is a perspective view of Fig. 2 before joining. be. A...Ball body, a...Ball hemisphere, 1...
...Striped colored area.

Claims (1)

[Scope of utility model registration request] In a table tennis ball formed by joining two hemispheres, a plurality of semicircular colored strips are provided on the hemispheres in substantially parallel manner, and the colored strips of both hemispheres are joined by being shifted by about 90 degrees. A table tennis practice ball.