JPS60168473A - Vibration absorber of racket - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a vibration absorbing device for absorbing vibrations when a racket used for tennis or the like hits a ball.

<Background Art> As is well known, for example, when a player hits a ball with a racket while playing tennis, the racket receives a considerable amount of vibrational impact.

For this reason, many players experience discomfort such as numbness in the hand that grips the racket. This impact is particularly strong when the ball is hit at a point other than the center of the racket's ball-hitting surface, that is, the so-called sweet spot of the ball-hitting surface, which is made up of a plurality of parallel guts stretched over the frame.

In addition, these days, non-pressure balls are often used which are relatively harder than conventional pressure balls, and even the slightest mishit is transmitted to the hands as a vibration shock.

In order to deal with this problem, a structure in which the gut mounting member is attached to the inner circumference of the gut suspension part of the frame together with a buffer member (see Japanese Patent Publication No. 53-38969), or an appropriate coupling member (movement attenuator) is used. A structure that mechanically connects two or more guts stretched substantially parallel to each other (Japanese Unexamined Patent Publication No. 53-123233 and Japanese Utility Model Application No. 53-123)
0-126365).

However, from Kotobuki's point of view, the former has a relatively complex structure and poor manufacturing efficiency, while the latter has problems in that the tensioning of the guts is difficult due to the multiple pre-installed parts on the coupling member. It is necessary to insert the cable into the hole one by one, which makes the troublesome tensioning work even more troublesome.

Furthermore, if the coupling member is attached to the gut through a pre-opened hole for gut insertion, the thickness of the guts will vary and the distance between adjacent guts will vary depending on the racket. The versatility of the coupling member, such as the fact that it may be impossible to attach the coupling member to the gut, or the contact between the member and the gut may be poor, making it impossible to obtain an effective vibration damping effect. There are some problems with this. Furthermore, there is a coupling member that can be inserted into a racket that has already been tightened, and is configured so that the member is bent into an S-shape and two strings are suspended from each end. Due to the strong vibrations of the gut and the rapid swinging of the entire racket, there is also the problem that it is not possible to securely attach the racket to the gut in a stable manner.

By the way, in the above-mentioned conventional device, vibration absorption is achieved by transmitting the vibration of the gut to the vibration damping member and making the different vibration modes of different guts interfere with each other. If there is no proper contact and sufficient contact area, vibrations will not be transmitted well from the guts that vibrate in all directions to the vibration damping member, and vibrations will only be transmitted in a specific direction, causing vibrations in other directions to be transmitted to the guts. It is something that remains in the.

Therefore, conventional devices have attempted to increase the contact area with the gut by inserting a vibration damping member into the gut, but none of these methods have been able to solve the above-mentioned problems.

<Purpose of the Invention> The present invention has been made in view of the above-mentioned circumstances, and is aimed at maintaining a sufficient contact area between the gut and the vibration absorbing device to reliably absorb the vibration of the gut received when hitting a ball. In addition to alleviating the impact transmitted to players' hands and allowing them to use the racket without discomfort such as numbness, the racket is extremely easy to put on and take off, and has increased versatility for different racket specifications. The purpose of this invention is to provide a vibration absorbing device with improved vibration absorption.

<Summary of the Invention> Therefore, in the present invention, a plurality of strings stretched in parallel are made of a flexible band-like member made of an elastic material or a viscoelastic material, and at least one side thereof is made of a band-like member made of an elastic material or a viscoelastic material. A vibration-absorbing band body having a large number of protrusions arranged in a row, and the vibration-absorbing band body being folded back so as to wrap around the outer gut of both liquids, and the folded end portion and the middle portion thereof are connected to each other in a freely attachable and detachable manner. The vibration absorbing device provided with the connecting means is configured to be attached while being in contact with the vibration absorbing device.

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

The vibration isolating member 1 as a vibration absorbing device according to the present invention is a part of a plurality of parallel guts 4 stretched vertically and horizontally on a frame 3 of a racket 2, that is, for example, at the lower part of the vertical line of the gut 4 and the horizontal line. It is attached to the part where there is no bracket while contacting the four guts 4.

This vibration isolating member 1 will be described in further detail with reference to FIGS. 2 and 3. The vibration isolating member 1 is made of a band-shaped member having flexibility and elasticity, such as rubber or synthetic resin, and has a large number of parallel protrusions 5 of a predetermined height arranged approximately symmetrically on both sides at predetermined intervals, A button-equipped protrusion 6 is erected on both sides at the center, and locking holes 7 into which the button-equipped protrusion 6 is fitted are formed at both ends, respectively, and are integrally molded.

Here, the protrusions 5 are arranged at intervals of approximately the same size as the guts 4 so that the guts 4 of a predetermined diameter are fitted into the grooves 8 between adjacent protrusions 5, and for example, seven strips are set as one set. The grooves 9 are arranged in a row and function as a main body of a groove 9 which is wider than the groove 8 between the protrusions 5 between one set and another adjacent set.

Further, the button-equipped protrusion 6 and the locking holes 7, 7 are arranged so that the two outer guts 4 of the four guts 4 and the respective grooves 9, 9 of the vibration isolating member 1 are in contact with each other. When the vibration isolating member 1 is folded back so as to be in contact with each other, each of the locking holes 7
, 7 is fitted with a button-equipped protrusion 6 to function as a connecting means.

The vibration isolating member 1 having such a structure is shown in FIG. 4 or 5, for example.
As shown in the figure, the vibration isolating member 1 is attached to the gut 4 by folding both ends of the vibration isolating member 1 to the same side and connecting both locking holes 7, 7.
The two ends of the vibration isolating member 1 are connected to the center by fitting them into the button-equipped protrusion 6 on one side, and the guts 4 are sandwiched from both sides. Fold it back in an S-shape to the side that holds the locking hole 7, 7
is fitted into the button-equipped protrusion 6 on the corresponding side to connect both ends and the center, and similarly the gutt 4 is mounted by sandwiching it from both sides.

At this time, the guts 4, 4 on both outer sides in the figure are grooves 9, 4, respectively.
At 9, the two inner guts 4.4 are locked so as to be fitted into the grooves 8 between the protrusions 5, respectively. Further, by folding back both ends of the vibration isolating member 1, the opposing protrusions 5 may be engaged with each other, or may be engaged so that the protrusions 5 are in relative contact with each other.

When the vibration isolating member 1 is attached to the gut 4 in this way, the shock wave caused by the vibration generated by the gut 4 when a player hits a ball is transmitted from the gut 4 to the vibration isolating member 1 directly or via the protrusion 5, and a different gut can be quickly and significantly absorbed by the interference effect of vibrations. Therefore, vibrations transmitted to the player's hands, etc. can be significantly suppressed, and discomfort such as numbness will not be caused.

It should be noted that the vibrations generated in the gut 4 when hitting the ball may affect parts of the gut 4 other than the four vertical lines where the anti-vibration portion 1 is in direct contact with the provisional seat, such as areas on both sides of the center of the gut 4 surface. Even if the vibration is hit by an intermediary, the vibration is still absorbed by the vibration isolating member 1 because the horizontal and vertical lines mutually absorb each other.

In addition, in this embodiment, the vibration isolating member 1 is formed by four vertical line guts 4.
However, it is not limited to this, and it may be six, eight, or more. In this case, the length of the vibration isolating member 1 itself may be adjusted in response to the difference in the width between the guts 4 depending on the racket. You can respond by doing this.

Also, in addition to pinching from both sides of the gut face, for example, the sixth
As shown in the figure, the structure may be such that the vibration isolating member is attached in a wavy manner by meandering alternately on the front and back sides of the gut surface. Since the strong contact wraps around and presses down 4, the anti-vibration effect is enhanced.

Further, in the first embodiment, the protrusions 5 are made into one set of seven protrusions, but the present invention is not limited to this, and two or more protrusions may be made into one set, and in this case, the pitch of each set is approximately the same as the pitch of the guts 4. It is best to arrange them so that they are equal. However, even if the pitches of the guts are not equal, if a large number of grooves are provided, the guts will fit into any groove, so the above-mentioned pitch requirements are not necessarily strict. Having such a large number of grooves means that all the guts that come into contact are fitted between the protrusions 5, etc., especially considering the fact that the pitch between adjacent guts varies greatly depending on the racket. All rackets with different pitches can be used in the same way, making them highly versatile.

T? c. Although the groove 8 between the protrusions 5 has approximately the same size as the diameter of the gut 4, the groove 8 is not limited to this, and may be larger or smaller than the diameter of the gut 4. If it is large, the gut 4 contacts the side wall of the protrusion 5 or (and) the bottom wall of the groove, and if it is small, it contacts the side wall of the adjacent protrusion 5 while expanding the space between the protrusions 5. In either case, the vibration absorption effect of the gut 4 is not impaired.

Furthermore, in the case where the groove 8 is larger than the diameter of the gut 4, for example, when the gut 4 does not contact the side wall of the protrusion 5 but only contacts the bottom wall of the groove 8, especially in this embodiment, the anti-vibration Since the member 1 is folded back, the tips of the opposing protrusions 5 that are folded back together with the bottom wall of the groove 8 do not come into contact with each other, and the opposing protrusions 5 that are folded back together with the bottom wall of the straddling groove 8 do not come into contact with each other. Projection 5
As a result, reliable contact between the gut 4 and the vibration isolating member 1 is maintained, and the vibration absorbing effect of the gut 4 is not impaired. Of course, it's true! When the diameter of the groove 8 is not very large as in fJfIl, the opposing protrusions 5 come into contact with each other in a meshing manner, and a high vibration absorption effect can be obtained.

Furthermore, in this embodiment, since no protrusions are provided on the folded portion of the vibration isolating member 1, the contact area between the folded portion and the gut 4 can be kept large, and the vibration absorption effect is enhanced. When no protrusion is provided in the folded part in this way, the vibration isolating member 1 at the folded part can be folded back at an acute angle, so as well as increasing the contact area as described above,
Anti-vibration members 1 facing each other (inner protrusions 5 facing each other)
The contact becomes more reliable, and vibration absorption by the vibration isolating member 1 can be performed satisfactorily.

Note that although the protrusion 5 in this example was formed to have a substantially rectangular cross section,
However, as shown in FIG. 7, for example, an enlarged portion 10a may be provided at the tip of each protrusion 10 so that the gut 4 can be more securely inserted into the groove between the protrusions.

Gut vibrations occur in all directions,
The large contact area between the gut and the vibration isolating member makes it possible to transmit vibrations in all directions to the vibration isolating member, which helps to greatly increase the vibration absorption effect caused by the vibration interference of the vibration isolating member. be. In this sense,
Fitting the gut into the groove between the protrusions, the gripping function of the gut by the protrusions when the vibration isolating member is stretched over the gut in a wave-like manner, and providing an enlarged portion on the protrusion are all important aspects of the gut and the damper. This has a great effect of increasing the contact area with the vibration member to better absorb vibrations.

In addition, as shown in FIG. 8, a hook portion 11a is formed at the tip of the protrusion 11 to ensure more secure contact between the vibration isolating members and the center portion facing the folded tip. good.

They are pulled close to each other, and as a result, the contact between the gut and the main body of the strip member is made more secure, and the vibration of the gut is diffused in multiple directions through the engaged hook portions, thereby absorbing the vibration. The effect is significantly improved.

Furthermore, in this embodiment, the vibration isolating member 1 is used as a connecting means.
While the button-equipped protrusion 6 is erected in the center, and the engagement holes are opened at both tips, the present invention is not limited to this. A locking hole may be provided in the portion. Furthermore, the protrusion or the locking hole may be provided not only at the central portion but also at a predetermined position, such as near the intermediate portion between the central portion and the tip portion.

In addition, as a connecting means, a left and right configuration may be provided by opening mounting holes at both ends and the center, and inserting a separate stopper member such as a permit rod member into the mounting holes. is clear.

Although the protruding stripes 5 or the button-equipped protrusions 6 are provided on both sides, it goes without saying that they may be provided on only one side.

Further, in this embodiment, the main body of the vibration isolating member 1 is made of an elastic material, but if it is made of a recently developed viscoelastic material, the vibration absorption effect will be greatly improved. In other words, a viscoelastic material has both an elastic function and a vibration suppressing function due to viscosity.In terms of elastic function, vibrations are absorbed by vibration interference, but in terms of viscoelasticity, vibrations are absorbed by mutual viscous friction between the compositions. It has the effect of damping the vibration itself, and the mutual effect of these effects makes it possible to absorb vibration to a large extent.

<Effects of the Invention> As explained above, according to the present invention, there is provided a vibration-absorbing band main body which is flexible and made of an elastic material or a viscoelastic material and has a large number of protrusions arranged in a row; a connecting means for detachably connecting the folded end portion and the central portion;
By attaching a vibration absorbing device equipped with a racket while being in contact with the gut of the racket, the contact area between the gut and the main body of the strip member is increased, so that the vibration of the gut generated when hitting a ball is reliably transmitted to the vibration absorbing device. is possible,
This reliably increases the vibration absorption effect and alleviates the vibration impact transmitted to the player's hands, making it possible to play with a racket that does not cause discomfort such as numbness.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the vibration absorbing device according to the present invention attached to a racket, Fig. 2 is a plan view of the same device, Fig. 3 is a longitudinal sectional view of Fig. 2, Fig. 4, Fig. 5, and FIG. 6 is a diagram illustrating different usage states of the device, and FIGS. 1 and 8 are partial views showing different embodiments of the protrusions of the device. 1... Vibration absorber 2... Racket 4... Guts 5, 10, 11... Projections 6... Projections with buttons 1... Locking holes 8, 9... Groove patents applicant
Asia Worth Co., Ltd. Representative Patent Attorney Fujio Sasashima

Claims (9)

[Claims] (1) P1 is made of a belt-shaped member made of an elastic material or a viscoelastic material, which is attached to the racket so as to be in contact with the strings across a group of parallel strings stretched across the racket, and which is flexible and made of an elastic material or a viscoelastic material. A vibration-absorbing band main body in which strings are arranged at predetermined intervals, and a connecting means for freely attaching and detaching connecting the ends of the folded ends of the strings by folding them so as to wrap around them and the middle part of the vibration-absorbing band main body. A vibration absorbing device for a racket, comprising the following: Vibration of the gut is absorbed by bringing the vibration absorbing band main body into contact with the gut. (2) The first claim in which the group of gutts is four or more
Vibration absorbing device for the racket described in Section 1. (3) The vibration absorbing device for a racket according to claim 1 or 2, wherein the protrusions have an interval such that one gut is inserted between adjacent protrusions. (4) The distance between adjacent protrusions is approximately equal to or less than the diameter of one gut.
3. The vibration absorbing device for a racket according to any one of items 3 to 3. (5) The vibration absorbing device for a racket according to claim 1 or 2, wherein the protrusion has a structure in which a distal end thereof abuts against a gut. (6) The racket according to any one of claims 1 to 4, wherein the protruding ridges are arranged as a set of at least two ridges at a pitch substantially equal to the pitch of adjacent guts. vibration absorber. (7) The racket vibration absorbing device according to any one of claims 1 to 6, wherein the protrusion has a substantially rectangular cross section. (8) The vibration absorbing device for a racket according to any one of claims 1 to 7, wherein the protrusion has an enlarged portion at its tip. (9) The racket vibration absorbing device according to any one of claims 1 to 7, wherein the protrusion has a hook-shaped tip. OI Claims 1 to 9, characterized in that the protrusion is provided in a part other than the folded part of the vibration absorbing band main body.
A vibration absorbing device for a racket according to any one of the items. (1) The connecting means includes a protrusion with a button that stands up on either one of the middle part of the vibration-absorbing band main body and the folded-back tip, and a button-equipped protrusion that is fitted into the protrusion so that the middle part of the vibration-absorbing band main body and the fold-back tip The vibration absorbing device for a racket according to any one of claims 1 to 10, wherein the racket vibration absorbing device has an engaging IL hole formed on the other side. The vibration absorbing device for a racket according to claim 11, which is provided on both sides of the vibration absorbing band body. The racket imaging absorption device according to any one of claims 1 to 10, which is formed by inserting a stopper member into the racket. The vibration absorbing device for a racket according to any one of claims 1 to 13, wherein the racket vibration absorbing device is configured to sandwich the gut from both sides of the surface. The racket vibration absorbing device according to any one of claims 1 to 13, which is configured to be arranged in a meandering wave shape.