JP2006218133A - Vibration damping implement for racket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration damping implement for a racket capable of damping vibrations suitably for a user by adjusting buffer power. <P>SOLUTION: A buffer implement for the racket is composed of a roughly disk-like main body part and a roughly doughnut-like ring part detachably and externally fitted to the main body part. The main body part is composed of a columnar body part having a hollow part in the inside and movably incorporating a small steel ball, upper and lower flanges provided integrally on the upper surface and lower surface of the body part, and a small hole communicated with the hollow of the body part. In the ring part, the inner periphery of an empty part at the center is formed to be almost the same diameter as the outer periphery of the body part, the ring part provided with a groove on an outer peripheral wall surface is externally fitted to the body part of the main body part, the groove is fitted to the string of the racket and attached, and the vibration of the racket is damped. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vibration damping tool for a racket.

Conventionally, as a racket vibration attenuator, a disk made of an elastic material and enclosed in a steel ball as disclosed in, for example, Japanese Patent Laid-Open No. 62-16774, for fitting a string along a peripheral wall of the disk An annular groove is formed, and is configured to be fitted into a quadrilateral defined by four adjacent racket strings extending vertically and horizontally to damp vibrations of the strings.
In addition, in utility model registration No. 3092134, a holding groove is opened on the bottom and side surfaces of a disk-shaped shock absorber, and one hole is opened on the vertical surface of the shock absorber, and the hole is extended inwardly. It is connected to the storage hole established in the center of the shock absorber and has a structure in which a metal ball is built in the storage hole, and when the racket strikes, the vibration force generated by the impact is generated in the metal ball at a high frequency in the storage hole. There is known a configuration in which vibration is generated, whereby shock noise and vibration force are absorbed by the soft elastic characteristics of the shock absorber and high-frequency vibration of the metal ball to reduce noise generation and attenuate the vibration force.
However, when a user hits a ball with a racket, the vibration force and noise generated by the impact with the ball are not necessarily constant in relation to the speed of the ball, the user's hitting force, the string tension, etc. However, it has been difficult to adjust these with conventional vibration damping tools and shock absorbers.

Japanese Patent Laid-Open No. 62-16774 FIG. 3 Utility Model Registration No. 3092134 gazette FIG.

    In order to solve the above-mentioned problem, the present invention detachably fits a ring part into a main body part, and attenuates the vibration of the string by the elastic force of the main body part and the ring part and the vibration of the steel ball. An object of the present invention is to provide a vibration attenuator for a racket that can adjust the damping effect by changing the part.

In order to solve the above problems, the present invention
In the invention of claim 1,
In the racket shock absorber comprising a soft elastic body formed on the outer peripheral surface of the holding groove for holding the string of the racket, which is fixed to the string of the racket and damps vibrations.
The racket shock absorber is composed of a soft main body part and a soft ring part detachably fitted to the main body part,
The main body portion has a hollow body and a columnar body portion in which a small steel ball is movably incorporated, and
An upper flange and a lower flange that are integrally provided on the upper surface and the lower surface of the body portion and project in a larger diameter than the body portion;
It consists of a small hole that communicates with the hollow portion and is set to have a smaller diameter than the steel ball and opens on the surface of the trunk portion, the upper flange, or the lower flange,
The ring portion has a central hole portion that fits to the outer periphery of the body portion without a substantial gap, and the outer periphery of the ring is formed so as to protrude outward from the outer periphery of the flange of the body portion. A groove that can fit the string of the racket is provided on the outer peripheral wall of the
The ring portion is placed over the upper flange or lower ring of the main body portion, and is fitted to the trunk portion, and a groove of the ring portion is fitted to a string of a racket.
In the invention of claim 2,
The racket cushion includes a substantially disc-shaped main body portion and a substantially donut-shaped ring portion that is detachably fitted to the main body portion.
Forming at least one of the upper flange portion or the lower flange of the main body portion and communicating with the hollow of the trunk portion;
The ring part is formed so that the inner periphery of the central hole in the center is substantially the same diameter as the outer periphery of the body part, and the outer periphery of the ring is formed to have a larger diameter than the outer periphery of the flange of the body part. The length is set shorter than the length of the body portion of the main body, and a groove capable of fitting a string of a racket is provided on the outer peripheral wall surface of the ring portion.

In the invention of claim 3,
The groove formed on the outer peripheral surface of the ring is formed in an annular shape at the approximate center of the outer peripheral surface of the ring.
Furthermore, in the invention of claim 4,
The said ring part consists of a some ring part from which elasticity differs, The ring part fitted to a main-body part can be changed, It is characterized by the above-mentioned.
In the invention of claim 5,
The ring portion is composed of a plurality of ring portions having different diameters on the outer periphery of the ring, and the ring portion fitted to the main body portion can be changed.

  The racket vibration attenuator of the present invention can adjust the vibration attenuation of the string by using rings having different elastic forces while using the same main body.

  In the present invention, the vibration damping tool is assembled by detachably fitting the ring part to the main body part, and the ring part can be changed, thereby realizing the adjustment of the vibration attenuation of the string.

A preferred embodiment of a racket vibration damping device of the present invention will be described below with reference to the drawings.
1 to 4 includes a substantially disc-shaped main body portion 2 and a substantially donut-shaped ring portion 11 that is detachably fitted to the main body portion 2.

[Main unit]
As shown in FIG. 5, the main body 2 is made of a soft elastic body, and has a hollow portion 4 inside as clearly shown in FIG. 2, and a plurality of extremely small steel balls inside the hollow portion 4. 5, a columnar body portion 3, an upper flange 6 and a lower flange 7 that are integrally provided on the upper surface and the lower surface of the body portion 3 so as to project larger in diameter than the body portion 3, and the upper flange portion 6 or at least one of the lower flange 7 and a small hole 8 communicating with the hollow portion 4 of the body portion 3.

[Ring part]
As shown in FIG. 6, the ring portion 11 is made of a donut-shaped soft elastic body, and the inner periphery of the central central hole portion 13 is formed to have substantially the same diameter as the outer periphery of the body portion 3.
The outer periphery of the ring part 11 is formed to have a larger diameter than the outer periphery of the upper and lower flange parts 6 and 7 of the body part 3 and is set so that the ring part 11 does not fall out of the upper and lower flange parts 6 and 7. ing.

Further, the thickness of the ring part 11 is set shorter than the length (height) of the body part 3 of the main body part 2, and the string G of the racket R is fitted to the outer peripheral wall surface of the ring part 11, A groove 15 is provided to be held between the opposing strings G.
The grooves 15 are set so that the length between the groove bottoms in the diametric direction is longer than the interval between the adjacent strings G.

[Vibration damping tool]
And since both the said main-body part 2 and the ring part 11 consist of a soft elastic body, the center hole part 13 of the ring part 11 shown in FIG. 6 is expanded, and the upper and lower sides of the main-body part 2 shown in FIG. The flange portions 6 and 7 are bent in the reduction direction, and the ring portion 11 is fitted over the upper flange 6 or the lower flange 7 of the main body portion 2 so as to be fitted into the body portion 3 without a gap. The vibration damping tool 1 shown in FIG.
As a result, the vibration attenuator 1 has a groove 15 formed on the outer peripheral surface thereof, to which the string G of the racket R is fitted and pressed by the opposing string G (see FIG. 3).

The vibration attenuating tool 1 formed in this way is fitted so as to be fitted into a gap between the strings G and the strings G provided in the vertical and horizontal directions and fitted into the grooves 15 of the ring portion 11 (FIG. 1, FIG. (See FIG. 2).
When the string G is fitted into the groove 15, the opposing string G is pushed to the bottom of the groove and bulges outward, and the vibration damping tool 1 is pinched through the groove 15 by the repulsive force of the string G.

  In this state, when the ball is hit with the racket, the vibration of the racket head is transmitted to the steel ball 5 built in the main body 2 through the vibration damping tool 1, and the steel ball 5 rapidly moves up and down in the hollow portion 4. Vibrate to become high-frequency vibration, and the vibration is attenuated to suppress the vibration transmitted to the racket handle. In addition, noise can be prevented from occurring.

In the present embodiment, a plurality of ring portions 11 having different elastic forces are prepared as the ring portions 11 to be fitted to the main body portion 2.
Therefore, the user can change the damping force of the vibration through the ring by selecting the ring portion 11 having the optimum elastic force for the user and fitting the ring portion 11 to the main body portion 2. Thus, it is possible to obtain the vibration attenuating tool 1 that is optimally fine-tuned.

As the ring portion 11 having different elastic force, a material having different elastic force is used as the material of the ring portion 11, but even when the same material is used, the diameter of the outer periphery of the ring portion 11 is changed and attached to the string G A plurality of ring portions 11 having different elastic forces may be used.
Further, if the diameter of the body 3 of the main body 2 is set longer than the length of the square partition formed by the vertical and horizontal chords G, in addition to changing the ring 11, the main body can be attached without attaching the ring 11. It can also be used as a vibration attenuator that uses only 2 to widen the range of adjustment of the damping force.

In the above embodiment, the ring portion has a donut shape. However, the ring portion may have a square or other polygonal shape as long as it is larger than the space between adjacent strings so that the strings do not come out of the groove. .
Similarly, the main body portion only needs to be a core for externally fitting the ring portion, and is not limited to a columnar shape but may be a prismatic shape or the like.
In addition, it goes without saying that various design changes can be made without departing from the scope of the present invention.

  The racket vibration damping device of the present invention is not limited to a tennis racket, and can be applied to sports using a racket, such as badminton, a racket ball, and squash.

It is a principal part expansion perspective view of the state which attached the vibration damping tool to the racket. Example 1 It is sectional drawing of the vibration damping tool of FIG. It is a side view of a vibration damping tool. It is a perspective view of a vibration damping tool. It is a perspective view of a main-body part. It is a perspective view of a ring part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration damping tool 2 Main body part 3 Trunk part 4 Hollow part 5 Steel ball 6 Upper flange 7 Lower flange 8 Small hole 11 Ring part 13 Center hole part 15 Groove G String

Claims (5)

In the racket shock absorber comprising a soft elastic body formed on the outer peripheral surface of the holding groove for holding the string of the racket, which is fixed to the string of the racket and damps vibrations.
The racket shock absorber is composed of a soft main body part and a soft ring part detachably fitted to the main body part,
The main body portion has a hollow body and a columnar body portion in which a small steel ball is movably incorporated, and
An upper flange and a lower flange that are integrally provided on the upper surface and the lower surface of the body portion and project in a larger diameter than the body portion;
It consists of a small hole that communicates with the hollow portion and is set to have a smaller diameter than the steel ball and opens on the surface of the trunk portion, the upper flange, or the lower flange,
The ring portion has a central hole portion that fits to the outer periphery of the body portion without a substantial gap, and the outer periphery of the ring is formed so as to protrude outward from the outer periphery of the flange of the body portion. A groove that can fit the string of the racket is provided on the outer peripheral wall of the
A racket shock absorber characterized in that the ring part is passed over the upper flange or the lower ring of the main body part and fitted into the body part, and a groove of the ring part is fitted into a string of the racket. The racket shock absorber is composed of a substantially disc-shaped main body portion and a substantially donut-shaped ring portion that is detachably fitted to the main body portion,
Forming at least one of the upper flange portion or the lower flange of the main body portion and communicating with the hollow of the trunk portion;
The ring part is formed so that the inner periphery of the central hole part has substantially the same diameter as the outer periphery of the body part, and the outer periphery of the ring is formed to be larger in diameter than the outer periphery of the flange part of the body part. The racket shock absorber according to claim 1, wherein the racket shock absorber is configured to be shorter than the length of the body portion of the portion, and provided with a groove capable of fitting the string of the racket on the outer peripheral wall surface of the ring portion.   The vibration damping tool for a racket according to claim 1 or 2, wherein the groove formed on the outer peripheral surface of the ring is formed in an annular shape at substantially the center of the outer peripheral surface of the ring. The ring part consists of multiple ring parts with different elasticity,
4. The racket vibration attenuator according to claim 1, 2 or 3, wherein a ring part fitted to the main body part can be changed. The ring part is composed of a plurality of ring parts having different outer diameters of the ring,
4. The racket vibration attenuator according to claim 1, 2 or 3, wherein a ring part fitted to the main body part can be changed.

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