JP2000037488A - Ping-pong packet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ping-pong racket satisfying any of characteristics such as spin, speed, and control. SOLUTION: This ping-pong racket 1, having a racket main body 4 with a grip base formed to integrally project from a flat ball striking plate 2 and a pair of grip members 5 joined to the grip base in such a way as to face each other across the base, is constructed with shock absorbers 10 interposed between the grip members 5 and the grip base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a racket for table tennis, and more particularly to a structure of a grip portion capable of improving any of spin, speed and control characteristics.

[0002]

2. Description of the Related Art In general, a table tennis racket comprises a racket body formed by integrally forming a grip board on a flat hitting board, a grip member joined to both sides of the grip board, and a sticking board. Generally, a structure provided with a set rubber is used.

[0003] Such a table tennis racket is excellent in characteristics such as easy spinning of the ball, high speed of playing the ball, and easy control of the ball because of its use. It is desirable.

Conventionally, in order to improve such characteristics, there has been a method of selecting the material of the racket body and the grip member, thereby suppressing vibration at the time of hitting the ball or reducing impact. General.

[0005]

However, there is a limit in the method of selecting the material and material of the racket body and the grip member as in the prior art, and it is not possible to satisfy all the characteristics of spin, speed and control described above. .

The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a table tennis racket having a novel structure that can satisfy all of the characteristics of spin, speed, and control.

[0007]

According to a first aspect of the present invention, there is provided a racket body formed by integrally forming a grip substrate on a flat hitting plate so as to face the grip substrate so as to face the grip substrate. In a table tennis racket provided with a pair of grip members, a shock absorbing material is interposed between at least one of the grip members and the grip substrate.

A second aspect of the present invention is characterized in that, in the first aspect, a notch is formed in a surface of at least one end of the grip member facing the grip substrate.

Here, it is desirable to use rubber or sponge having elasticity as well as flexibility as the shock absorbing material. Further, the shock absorbing material may be provided on both surfaces or only one surface of the grip substrate, and the notch may be formed on both or only one of the grip bodies.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 are views for explaining a table tennis racket according to an embodiment of the present invention. FIGS. 1 and 2 are longitudinal sectional views of the table tennis racket, respectively.
It is an exploded perspective view.

In the drawing, reference numeral 1 denotes a table tennis racket,
This is so as to oppose a scrambled racket body 4 formed by integrally projecting a strip-shaped grip substrate 3 on a hitting plate 2 having a substantially elliptical shape, and the grip substrate 3 with the grip substrate 3 interposed therebetween. And a pair of grip members 5 joined by an adhesive.

The racket main body 4 has a structure in which a skin plate 8 is bonded to both surfaces of a wooden core member 6 with a fiber-reinforced synthetic resin plate 7 or a plywood interposed therebetween. Further, the grip member 5 is in the form of a thick raised plate, and is made of a highly uniform fine fiber material. This fine fiber material is formed, for example, by heating high-pressure Kasamatsu fiber at high pressure and then dry-pressing it.

The grip member 5 manufactured as described above
Has a very homogeneous material structure with no voids or layers in its cross-sectional properties, and has a function of suppressing mechanical vibrations at the time of hitting a ball. As a specific material, it is preferable to employ a commercially available medium-density fever board or a homogeneous porous isotropic rigid synthetic resin foam.

An impact absorbing material 10 which is a feature of the present embodiment is interposed between the grip substrate 3 and the grip member 5. This shock absorbing material 10 is a grip substrate 3
And are joined by an adhesive. The shock absorbing material 10 is a sheet having a thickness of about 1 mm, and examples of the material include natural rubber and synthetic rubber having flexibility and elasticity, and sheets and sponges of synthetic resin having elasticity. For example, NR rubber sheet or NR sponge, or polyurethane, EV
A sheet or sponge such as A can be adopted.

A notch 11 is formed at the end 5a of each of the grip members 5 on the surface facing the grip substrate 3, and the notch 11 allows the grip member 5 and the grip substrate 3 to be interposed. A void is provided.

Next, the operation and effect of this embodiment will be described. According to the table tennis racket 1 of the present embodiment, since the shock absorbing material 10 is interposed between the grip substrate 3 and the grip member 5 of the racket body 4, when the ball collides with the hitting plate 2, the racket body 4 itself is used. With the bending, both the bending due to the elastic deformation of the shock absorbing material 10 and the racket body 4 are enlarged, and the racket body 4 is quickly returned by the stored repulsive force and plays the ball. It will be.

As described above, since the bending of the racket body 4 at the time of hitting the ball can be increased, it is possible to increase the frictional force applied to the ball by an amount capable of maintaining the contact time between the ball and the hitting plate 2 longer. The rotation force of the ball can be increased, and the spin characteristics can be improved.

Since the bending of the racket main body 4 can be increased, the repulsive force of the racket main body 4 immediately after impact increases, and the return by the repulsive force increases, and the ball is strongly hit. Can increase.

Further, since the contact time between the ball and the hitting plate 2 can be lengthened, the operation in the hitting direction of the ball becomes easy and the controllability of the ball can be improved. as a result,
The effect of satisfying any of the three characteristics of table tennis, spin, speed and control, can be obtained.

In this embodiment, since the notch 11 is formed at the tip 5a of the grip member 5, the notch 1 is formed.
1 promotes the bending of the racket main body 4 at the time of a collision, so that the contact time between the ball and the hitting surface can be further extended, and the above-mentioned characteristics can be further improved.

FIGS. 3A to 3D are schematic diagrams showing the results of an experiment performed to confirm the effects of the present embodiment. In this experiment, the grip portion of the table tennis racket 1 of the present embodiment was fixed by being fixed approximately vertically by a fixture, and the ball was hit at high speed against the hitting plate in this state, and the amplitude of the racket due to the impact force was increased. I took a picture with a speed camera.

FIG. 3A shows the racket in a stationary state before the ball collides, FIG. 3B shows the maximum bending of the racket at impact, and FIG. 3C shows the racket immediately after impact. FIG. 3D shows a return state due to the repulsive force.
Indicates a state in which the racket is pushed out slightly before the rest position line L by the repulsive force. In the figure, the solid line A shows the amplitude characteristic of the racket of the present invention, and the two-dot chain line B shows the amplitude characteristic of the conventional racket.

As is clear from FIG. 3, the racket A of the present invention undergoes a large bending when the ball collides, and has an amplitude about three times that of the conventional racket B (FIG. b)). Further, the racket A of the present invention after the impact is restored more quickly than the conventional racket B, and the restoration speed is faster (see FIG. 3C). Further, it can be seen that the racket A of the present invention is pushed forward from the rest position line L by the repulsive force, thereby strongly hitting the ball (see FIG. 3D).

In this experiment, a ball was hit at a position deviating from the sweet spot of the hitting plate to confirm the shock absorbing effect. First, in the conventional racket B, it is considered that the grip portion came off the fixture with the collision of the ball, and the grip portion was hit directly without absorbing the impact force. In this case, since the impact force is transmitted directly from the grip portion to the player's hand, the ball striking surface is easily shaken, and control is deteriorated.

On the other hand, in the racket A of the present invention, the ball rebounds forward without the grip portion coming off the fixture, and the impact force is sufficiently absorbed. This makes it difficult for the impact force to be transmitted to the player's hands, gives the same feeling as hitting the ball at the sweet spot, and improves the control by eliminating the deflection of the hitting surface. In this regard, it is considered that the speed of the racket restoration speed also contributes to this point.

On the other hand, in the prior art, the impact force at the time of impact tends to concentrate on the grip portion due to the racket shape, and there was a case where damage was caused due to repeated wood fatigue due to this repetition. On the other hand, in the racket of the present embodiment, since the shock absorbing material absorbs the impact force, the wood fatigue can be reduced,
Racket life can be extended.

In the above embodiment, the shock absorber 10
Has been described on both sides of the grip substrate 3,
The present invention may be arranged on only one side, and will be appropriately selected according to the player's preference. By the way, in the case of both sides, the amplitude is large and a soft shot feeling can be obtained. On the other hand, in the case of one side, the shot feeling becomes harder as the amplitude becomes smaller. In the case of this one side, it is possible to change the feel of the hit ball by inserting the shock absorbing material on the side of the hitting surface or on the opposite side of the hitting surface. It is possible to create curves and the like.

[0028]

According to the racket for table tennis according to the first aspect of the present invention, since the shock absorbing material is inserted between the grip substrate and the grip member of the racket main body, the shock absorbing material is elastically deformed to cause a collision. In addition, the bending of the racket body can be increased, and the repulsive force can be increased. As a result, the amplitude increases and the contact time between the ball and the hitting surface can be maintained longer. As a result, the spin force can be improved by increasing the rotational force of the ball, the speed of the ball can be increased by strongly hitting the ball, and the control can be improved by increasing the operability in the ball hitting direction. There is an effect that characteristics can be improved.

According to the second aspect of the present invention, since the notch is formed in the grip member, the notch promotes the amplitude of the racket main body at the time of collision, and in this case, the above-described characteristics can be further improved. effective.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a table tennis racket according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the table tennis racket.

FIG. 3 is a schematic diagram showing the results of an experiment performed to confirm the effects of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Table tennis racket 2 Hitting board 3 Grip board 4 Racket main body 5 Grip member 10 Shock absorber 11 Notch

Claims (2)

[Claims] 1. A racket body comprising a gripping substrate integrally formed on a flat hitting plate, and a pair of gripping members joined to the gripping substrate so as to face each other with the substrate interposed therebetween. A racket for table tennis, wherein a shock absorbing material is interposed between at least one grip member and a grip substrate. 2. The table tennis racket according to claim 1, wherein a notch is formed in a surface of at least one end of the grip member facing the grip substrate.