JPH0999117A - Vibration absorbing tool for racket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust a vibration absorbing level accoring to a liking of an individual by forming a vibration absorbing tool for a racket of a belt-like elastic body where thick parts are formed on both ends, hooking parts arranged on the tips of the thick parts and plural projecting strips arranged in a row on inside surfaces of the hooking parts and both surfaces of the belt-like elastic body. SOLUTION: This vibration absorbing tool for a racket to be installed on plural guts 4a, b, c, d is composed of a belt-like elastic body 6 where thick parts 5 and 5 are formed on both ends, hooking parts 7 and 7 arranged on the tips of the thick parts 5 and 5 and plural projecting strips 8 arranged in a row on inside surfaces of the hooking parts 7 and 7 and both surfaces of the belt-like elastic body 6. One of the hooking parts 7 is hooked from above gut 4a, and the belt-like elastic body 6 is passed through under gut 4b, and is passed through above gut 4c in the next place, and lastly, another one of the hooking parts 7 is hooked from below gut 4d, and is hookingly fastened. Therefore, impact and vibration generated in the guts at ball hitting time are transmitted directly or through the projecting strips 8 to the vibration absorbing tool, and are quickly and significantly absorbed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a racket vibration absorber, and an object thereof is to absorb the vibration of a racket used for tennis or the like at the time of hitting a ball and to maintain an appropriate feel at impact. It is to provide an absorber.

[0002]

2. Description of the Related Art When a ball is hit with a racket for tennis or the like, the impact or vibration is transmitted to the wrist or elbow through the racket, which sometimes causes numbness in the hand of the player holding the racket. Especially when the sweet spot on the gut surface is removed and the ball is hit, the impact and vibration are transmitted to the hands more greatly. In view of such circumstances, as a device for absorbing the vibration of the racket at the time of hitting a ball, a structure in which a plurality of guts are mechanically connected by an appropriate member (Japanese Patent Laid-Open No. 62-167)
No. 74, Jitsukai Sho 63-8065, Japanese Patent Publication No. 61-502
No. 235), a structure in which a strip-shaped member is suspended in an S-shape on a plurality of guts (Shokai 60-23063), and the like have been proposed. However, in the former case, it is difficult to deal with the difference in gut diameter and gut interval depending on the racket, but in the latter case, the adhesion of the belt-shaped member to the gut is poor and a sufficient damping effect cannot be obtained. There were challenges. In order to address these problems, a structure (Japanese Patent Laid-Open No. 168473/1985) in which a strip-shaped member having a large number of protrusions is wound around a plurality of gut has been proposed. In this technique, a large number of ridges are arranged in a row at a predetermined interval on at least one surface of a strip-shaped member, and the outermost guts of a plurality of guts are folded back so that they are folded back and the folded tip end and the central part of the strip-shaped member are connected. By doing so, the gut and the belt-shaped member are brought into contact with each other to absorb the vibration of the gut.

[0003]

However, in the above-mentioned technique, the vibration absorber having a fixed length is folded and fixed by winding both outermost guts of a plurality of guts. The number of guts is almost uniformly determined by the racket, and therefore the operation of adjusting the level of vibration absorption cannot be performed, and there is a problem that it is not possible to cope with the difference in shot feeling and the preference of the level of vibration absorption among individuals. The present invention has been made in view of the above-mentioned conventional problems, and is capable of reliably absorbing the shock and vibration generated in the gut at the time of hitting a ball, and obtaining an appropriate hitting feeling according to individual taste. Another object of the present invention is to provide a vibration absorber for a racket capable of adjusting the level of vibration absorption.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and in the racket vibration absorber according to claim 1, a plurality of the racket stretched on the ball striking surface. A racket vibration absorber attached between guts, wherein the racket vibration absorber is provided in a symmetrical direction at each end of the strip-shaped elastic body having a thick portion formed at both ends. It is composed of a hook portion and a plurality of protrusions arranged in a row on the inner surface of the hook portion and both surfaces of the strip-shaped elastic body, and the plurality of protrusions are arranged at alternating positions on the front and back surfaces of the strip-shaped elastic body. It was decided to be arranged in a row. In the racket vibration absorber according to a second aspect of the present invention, the hooking portion is formed such that the strip-shaped elastic body protrudes from the surface of the thick portion. A racket vibration absorber according to a third aspect of the present invention is the racket vibration absorber according to the first or second aspect, in which the hook portion is insert-molded into a band-shaped elastic body, and the hook portion is inserted into the band-shaped elastic body. It is decided that the hollow portion is provided in the. A racket vibration absorber according to a fourth aspect is the racket vibration absorber according to any one of the first to third aspects, in which one hook portion is located closer to the surface than the center line of the belt-shaped elastic body is. The portion is provided so that the hook is located closer to the back surface than the center line of the belt-shaped elastic body. The racket vibration absorber according to claim 5 is the racket vibration absorber according to any one of claims 1 to 4, wherein a central ridge portion larger than the plurality of ridges is provided on a front surface and a back surface of a central portion of the belt-shaped elastic body. It was decided to be provided. A racket vibration absorber according to a sixth aspect is the racket vibration absorber according to the fifth aspect, wherein a constricted portion is provided at an interface between the central ridge portion and the band-shaped elastic body.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a racket vibration absorber according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a state where a racket vibration absorber according to the present invention is attached to a racket, FIG. 2 is a plan view of the racket vibration absorber, FIG. 3 is a front view thereof, and FIGS. 4 and 5 are racket vibrations. It is a figure which shows a different attachment state of an absorber. The racket vibration absorber 1 according to the present invention is attached to a plurality of guts 4 stretched around the frame 3 of the racket 2 in the state shown in FIG. As shown in FIGS. 2 and 3, this racket vibration absorber 1 is provided in a symmetrical direction at the tips of the strip-shaped elastic body 6 having the thick portions 5 and 5 formed at both ends and the tips of the thick portions 5 and 5, respectively. , And a plurality of projections 8 arranged in a row on the inner surface of the hooks 7 and 7 and on both sides of the strip-shaped elastic body 6, respectively. .. are arranged in rows on the front and back surfaces of the belt-shaped elastic body 6 such that the arrangement positions thereof are alternating positions. Here, the protrusion 8 is at least the gut 4.
Are arranged at equal pitches with a space sufficient for fitting. The hook portion 7 has a J-shape, and the protrusion 8 is arranged at least at one position inside the straight line portion.

FIG. 4 shows an example of mounting the racket vibration absorber 1 having such a structure. That is, the racket vibration absorber 1
One of the hooking portions 7 provided at both ends of the gut 4a is hooked from above the gut 4a, the strip-shaped elastic body 6 is passed under the adjacent gut 4b, and then over the adjacent gut 4c, and finally adjoined. The other side of the hook portion 7 is hooked and locked from below the gut 4d. At this time, the gut 4b, 4c is sandwiched and locked by the groove 9 formed by the ridge 8 arranged on the front and back surfaces of the strip-shaped elastic body 6, and the gut 4a, 4d is arranged on the hook portion 7. The ridge 8 and the curved portion of the hook portion 7 are sandwiched and locked. As described above, when the racket vibration absorber 1 is attached to the gut 4, the shock and vibration generated in the gut 4 at the time of hitting the ball directly or directly to the racket vibration absorber 1 attached to the gut 4. It is transmitted via 8 and is rapidly and significantly absorbed. Therefore, a large shock or vibration is not transmitted to the player's hand holding the racket, and the player's hand is not numbed.

Further, since the band-shaped elastic body 6 of the racket vibration absorber 1 is expandable and contractible, it can be attached to a large number of guts as shown in FIG. 5 or a small number of guts as shown in FIG. It can also be attached to the gut. In this way, by changing the number of guts to be attached, it is possible to change the effect of vibration damping and enjoy the difference in feel at impact. Therefore, it is possible to properly use the level of feel at impact and the level of vibration absorption according to personal preference. Further, since the racket vibration absorber 1 can be attached so as to be symmetrical with respect to the front and back during attachment, the shot feeling does not differ between the front and back even if the racket is rotated front and back to change the ball striking surface during play. Further, since the ridges 8 are arranged on the front and back surfaces of the strip-shaped elastic body 6 in such a manner that the positions of the ridges 8 are arranged alternately, the racket vibration absorber 1 is attached to the gut, and the ridges 8 are formed. When the gut 4 is sandwiched in the groove 9 formed by the gut 4, there is no ridge 8 on the back surface of the ridge 8 for sandwiching the gut as shown in FIG. The elastic body 6 is easily bent, and the degree of contact between the ridge 8 and the gut 4 can be further increased.

FIG. 6 shows a plan view of a racket vibration absorber showing another embodiment of the present invention, and FIG. 7 shows a front view thereof. This racket vibration absorber 1 includes a central ridge portion 1 which is larger than the ridge 8 on the front and back sides of the central portion of the band-shaped elastic body 6.
It has 0. Therefore, as shown in the drawing, the central ridge portion 10
The manufacturer's logo mark, etc. can be displayed in a large size. In addition, it is preferable to provide a constricted portion 11 on the central protruding portion 10 as shown in FIG. 7. By providing the constricted portion 11, the deformation (elongation) of the central ridge portion 10 can be suppressed during attachment to the gut. Therefore, the manufacturer's logo mark can be suppressed from being deformed, and the manufacturer's name or the like can be clearly recognized even when attached to the gut. The ridge 8 has a substantially hemispherical cross-sectional shape, and is formed so that the cross-sectional area becomes smaller from the central portion toward both ends. By forming the ridges 8 to have a substantially hemispherical sectional shape, the moldability is improved, the productivity is improved, and the design is excellent. Ridge 8
In the first embodiment, the numbers are 10 for the front side and 2 for the back side.
In the embodiment, the number of front and back surfaces is six, but the number is not particularly limited.

Also, the material of the racket vibration absorber 1 is not particularly limited, but the belt-shaped elastic body 6 is used.
Silicone resin is most preferably used for. The reason for this is that the silicone resin has an excellent vibration absorption effect and weather resistance, has a good coloring property, and can easily meet the needs of fashionability required for sports goods. The molecular weight of silicone resin is 400,000-5
0,000, hardness 20 ° -40 ° (JISA), elongation 700-
About 1000 (%) is preferably used, and specifically, TSE2931-U, T manufactured by Toshiba Silicone Co., Ltd.
SE261-4U, TSE291-3U, Toray Dow
SE1184U, S made by Corning Silicone Co., Ltd.
Suitable examples include E4704U and SE1120U (both are trade names). Further, materials such as polybutylene terephthalate (PBT) and nylon are preferably used for the hooking portion 7. This is because the material has a strength capable of withstanding the vulcanization temperature (about 180 ° C.) of the silicone resin during molding of the hook portion 7 and the band-shaped elastic body 6 and withstanding the impact of a hit ball. By using a material that can withstand the vulcanization temperature of the silicone resin during the molding of the belt-shaped elastic body 6 for the hook portion 7, the hook portion 7 and the belt-shaped elastic body 6 can be integrally molded, and the productivity is improved.

The hook portion 7 has a hollow portion 7 as shown in FIG.
It is desirable to provide a. By providing the hollow portion 7 a in the hook portion 7, the strip-shaped elastic body 6 is provided in the hollow portion 7 a of the hook portion 7.
The resin material is inserted and molded, and the connection between the hook portion 7 and the belt-shaped elastic body 6 becomes strong. Also, in the illustrated example,
One hook portion 7 is provided so that the hook is located closer to the front surface than the center line of the belt-shaped elastic body 6, and the other hook portion 7 is provided so that the hook is located closer to the back surface than the center line of the belt-shaped elastic body. There is. In this way, by disposing the hook portion 7 so as to be displaced from the center line of the strip-shaped elastic body 6, it is possible to insert the gut into the hook portion 7 without being obstructed by the thick portion 5, so that the hook can be hooked on the gut. Easy and easy to install. In addition, by applying a primer treatment to the connection between the hook portion 7 and the belt-shaped elastic body 6, the connection becomes easy and strong. In the racket vibration absorber 1 according to this embodiment, in order to maximize the vibration absorbing effect, it is preferable that the number of attachments to the gut is about six.

Although the ridges 8 are formed to have a rectangular cross section in the first embodiment and a hemispherical cross section in the second embodiment, the present invention is not limited to this, and for example, FIG. As shown in, the enlarged portion 8a may be provided at the tip of the ridge 8. By providing such an enlarged portion 8a, the ridge can more reliably lock the gut, and the vibration damping effect can be enhanced. Further, the size of each ridge 8 may be the same as in the first embodiment, or the size of the cross-sectional area of each ridge may be changed as in the second embodiment. Good.

[0012]

As described above, the invention according to claim 1 is a racket vibration absorber which is attached between a plurality of guts stretched on the ball striking face of the racket. The vibration absorber for use is provided with a strip-shaped elastic body having thick-walled portions formed at both ends, a hooking portion provided in a symmetrical direction at the tip of the thick-walled portion, an inner surface of the hooking portion, and both surfaces of the strip-shaped elastic body. A plurality of ridges, and the plurality of ridges are racket vibration absorbers that are arranged in rows on the front and back surfaces of the band-shaped elastic body so that the arrangement positions of the ridges are alternately arranged. Play. The shock and vibration generated in the gut at the time of hitting the racket vibration absorber attached to the gut are transmitted to the racket vibration absorber attached to the gut directly or through the ridges, and the movement is rapid and significant. Since it is absorbed by, the large impact and vibration are not transmitted to the player's hand holding the racket, and the player's hand is not numbed.

Further, since the band-shaped elastic body of the racket vibration absorber is freely expandable, the number of guts to be attached can be changed, and the vibration damping effect can be changed to enjoy the difference in feel at impact. . Therefore, one racket vibration absorber can be used for different levels of shot feeling and vibration absorption according to the tastes of many users, and is versatile. Also,
Since it can be attached so that the front and back are symmetrical, the shot feeling does not differ between the front and back, and the racket can be freely rotated during play. Furthermore, since the ridges are arranged in rows on the front and back surfaces of the strip-shaped elastic body so that the positions of the ridges are alternately arranged, the racket vibration absorber is attached to the gut and is formed in the groove formed by the ridges. When the gut is sandwiched, there is no ridge on the back of the ridge that holds the gut,
The band-shaped elastic body is easily bent at the portion where the ridge sandwiches the gut, the degree of adhesion between the ridge and the gut can be further enhanced, and a reliable and large vibration absorbing effect can be obtained.

The invention according to claim 2 is a vibration absorber for a racket, wherein the projection is formed so as to project from the surface of the thick portion. Therefore, when the vibration absorber for a racket is attached to the gut, the projection is provided. The gut is deeply and surely sandwiched between the grooves formed by, and the degree of close contact between the ridge and the gut is enhanced, so that a reliable and large vibration absorbing effect can be obtained. The invention according to claim 3 is the racket vibration absorber, wherein the hooking portion is insert-molded in the band-shaped elastic body, and a cavity is provided in the insert portion of the hooking portion into the band-shaped elastic body. By molding the resin material of the band-shaped elastic body into the cavity of the hooking section, the connection strength between the hooking section and the band-shaped elastic body becomes excellent.

According to a fourth aspect of the present invention, one hook portion is located closer to the front surface than the center line of the strip-shaped elastic body, and the other hook portion is located closer to the back surface than the center line of the strip-shaped elastic body. Since it is the racket vibration absorber that is provided so as to be positioned, it is easy to attach the hooking portion to the gut, and there is an effect that the attaching property is excellent. Since the invention according to claim 5 is the racket vibration absorber, the central protrusions are provided on the front and back surfaces of the central portion of the band-shaped elastic body, the central protrusions being larger than the plurality of protrusions. It is possible to attach a large manufacturer's logo mark or the like to the part, and at a glance it is possible to determine which manufacturer's product it is, and it is possible to obtain a large advertising effect. Since the invention according to claim 6 is the racket vibration absorber in which a constricted portion is provided at the interface between the central protruding portion and the band-shaped elastic body, the deformation of the central protruding portion during attachment to the gut is achieved. Since the (stretch) is suppressed, the deformation of the manufacturer's logo mark and the like is reduced, and the manufacturer name and the like can be clearly recognized even when attached to the gut.

[Brief description of drawings]

FIG. 1 is a view showing how a racket vibration absorber according to the present invention is attached to a racket.

FIG. 2 is a plan view of a racket vibration absorber according to the present invention.

FIG. 3 is a front view of the racket vibration absorber according to the present invention.

FIG. 4 is a view showing how the racket vibration absorber according to the present invention is attached to a gut.

FIG. 5 is a diagram showing an example of another embodiment of a racket vibration absorber according to the present invention attached to a gut.

FIG. 6 is a plan view showing an example of another embodiment of the racket vibration absorber according to the present invention.

FIG. 7 is a front view showing an example of another embodiment of the racket vibration absorber according to the present invention.

FIG. 8 is a front view showing an example of an embodiment of a hooking portion of the racket vibration absorber according to the present invention.

FIG. 9 is a partial view showing an example of another embodiment of the racket vibration absorber according to the present invention.

[Explanation of reference numerals] 1 vibration absorber for racket 2 racket 3 frame 4 gut 4a to 4d gut 5 thick portion 6 band-like elastic body 7 hooking portion 7a hollow portion 8 ridge 9 groove 10 central ridge portion 11 constriction portion

Claims (6)

[Claims] 1. A racket vibration absorber which is attached between a plurality of guts stretched on the ball striking face of the racket, wherein the racket vibration absorber has thick portions formed at both ends. The strip-shaped elastic body, a hook portion provided at the tip of the thick portion in a symmetrical direction, and a plurality of ridges arranged in a row on the inner surface of the hook portion and both surfaces of the strip-shaped elastic body. A racket vibration absorber, wherein the belt-like elastic bodies are arranged in rows on the front and back surfaces of the elastic body so that the positions of the elastic bodies are alternately arranged. 2. The vibration absorber for a racket according to claim 1, wherein the protrusion is formed so as to protrude from the surface of the thick portion. 3. The elastic member according to claim 1, wherein the hook portion is insert-molded into the belt-shaped elastic body, and a hollow portion is provided in an insert portion of the hook portion into the belt-shaped elastic body. Vibration absorber for rackets. 4. One hook portion is provided so that the hook is located closer to the surface than the center line of the strip-shaped elastic body, and the other hook portion is provided so that the hook is located closer to the back surface than the center line of the strip-shaped elastic body. The racket vibration absorber according to claim 1, wherein the vibration absorber is a racket vibration absorber. 5. The vibration absorbing racket according to claim 1, wherein a central ridge portion larger than the plurality of ridges is provided on front and back surfaces of a central portion of the band-shaped elastic body. Ingredient 6. A constricted portion is provided at an interface between the central ridge portion and the strip-shaped elastic body.
The vibration absorber for the racket described.