JP2000279557A - Vibration absorbing grip applied to racket or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make drastically improvable the vibration absorbing performance of a grip by forming the grip in such a state as sticking a compressive layer of polyurethane and a woven fabric layer together and setting the ratio of the thickness of the polyurethane layer and the woven fabric layer to a specific value. SOLUTION: The grip includes a woven fabric layer 11 having an opening in general, and its inner layer surface is stuck to the top of the grip of a tennis racket, provided with a smooth and sealing type opening, and includes a polyurethane layer 15 stuck to a woven fabric layer 11. The integrally stuck polyurethane layer 15 and woven fabric layer 11 forms a single string-shape structure and is wound around the grip of the racket. The woven fabric layer 11 is composed of a felt-like material having an appropriate opening and the upper surface is stuck to the lower surface of the polyurethane layer 15. The ratio of the thickness of the polyurethane layer 15 to the thickness of the woven fabric is set to approximately 0.18 or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration-absorbing grip applied to a racket or the like. Especially used for rackets and other equipment that requires the use of a hand, tennis rackets, squash rackets, golf clubs, baseball bats, hammers, which can absorb vibration when the equipment is subjected to impact. The present invention relates to a kind of vibration-absorbing grip which is applied to the like.

[0002]

2. Description of the Related Art As is well known, devices such as tennis rackets and tennis balls generate vibrations due to collision with each other, and this type of vibration has a very bad effect on muscle tissue and joints of arms such as elbows. Effect. This type of vibration results in inflammation of the elbow, often referred to as "tennis elbow", for tennis players. Medical studies have shown that this "tennis elbow" symptom is due to the sustained impact and vibration of the arm when a tennis player hits the ball with a racket. For this reason, various grips that claim that the occurrence of the "tennis elbow" symptom can be prevented have already been developed, but a fundamental solution has not been reached. However, the grips of the present invention provide a "tennis elbow" -like structure to the arm joints and muscle tissue of users of tennis rackets, squash rackets, golf clubs, baseball bats, and other devices that transmit impact forces, such as hammers. Vibration phenomena can be reduced or eliminated reliably.

A known grip of this type has a polyurethane layer structure with a woven fabric layer attached to the back surface, and the thickness of the woven fabric layer generally employed is about 1.4 mm. On the other hand, the thickness of the polyurethane layer is typically less than 0.25 mm, and is only considered to increase the tackiness to prevent palm slippage due to sweat. That is, regarding the use of the polyurethane layer, the function of vibration suppression has not been actually considered in the past. On the other hand, the woven fabric layer is used to cushion vibrations of the user's arm and palm when the ball collides with the tennis racket. In the known grip, the thickness ratio generally adopted is as follows. PU in the table is polyurethane, and F is a woven fabric layer. As shown in the table above, generally the thickness of the grip is 2.
At 0 mm, the thickness ratio value of PU / F is 0.25 mm or 0.142.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a vibration-absorbing grip applied to a racket or the like in order to improve the various disadvantages of the above-mentioned known structure. It increases the proportional value of the thickness of the polyurethane layer and the woven fabric layer used in the tennis racket or similar racket grip, and when the ratio exceeds the known grip ratio, the grip absorbs vibration. Performance can be greatly improved. Furthermore, it can provide excellent vibration absorption when combined with the handle of a big racket, which has been very widely accepted in recent years. Furthermore, it not only takes full advantage of the adhesive properties provided by the polyurethane layer,
When the tennis ball collides violently with the racket, vibrations generated in the user's arm, palm, etc. can be effectively buffered. In addition, a single layer of woven fabric adheres to the inner surface of the specially designed polyurethane layer to enhance the strength of the polyurethane layer and to provide a vehicle for combination on a racket handle. Furthermore, it has pores in the polyurethane layer which are perpendicular to the longitudinal end of the racket handle, which can further enhance the cushioning properties of the polyurethane layer.

[0005]

In order to solve the above-mentioned problems, the present invention provides a vibration-absorbing grip applied to the following rackets and the like. It is combined with a tennis racket or similar racket handle. A compression layer and a woven fabric layer of mainly polyurethane are adhered and formed, and the ratio of the thickness of the polyurethane layer to the thickness of the woven fabric layer is at least 0.18 or more. The string-like structure thus formed is smoothly wound around the racket handle.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 5, the vibration-absorbing grip G of the present invention is assembled on a handle 10 of a tennis racket R. The grip G includes a layer of woven fabric 11, usually having openings. The inner layer surface 13 is adhered to the handle 10 of the tennis racket R. The grip G also comprises a polyurethane layer 15 with a smooth, closed opening and adhered to the woven layer 11. The integrally adhered polyurethane layer 15 and woven fabric layer 11 form a single string-like structure, which is wound on a racket handle 10 in the manner shown in FIG. On the other hand, the woven fabric layer 11 is made of a felt-like material having an appropriate opening, and the upper surface layer 17 is adhered to the lower surface 19 of the polyurethane layer 15. At this time, as shown in FIGS. 4, 7, and 8, the polyurethane layer 15 is stretched in a vertical state. When the grip is assembled on a handle of this kind, the grip is usually constituted by pores 21 which are perpendicular to the longitudinal axis of the racket handle 10.

Next, as shown in FIG. 3, the outer portion of the woven fabric layer 11 is formed at a position 24, that is, a kind of upward and outward inclination is formed. Are all wound around the four sides of the handle 10. The woven fabric layer 11
The inner layer surface 13 covers the ordinary layer (adhesive layer) 30 using a protective tape 32 that can be quickly opened. Just open the normal layer (adhesive layer) 30 of the protective tape 32,
The grip G can be smoothly adhered to the handle 10 (see FIG. 2). Subsequently, the string-like structure of the polyurethane layer and the woven cloth, which are already adhered together, is tightly wound around the four sides of the handle 10 and is similar to a grip which is connected to a commonly used tennis racket handle.

The main purpose of employing the polyurethane layer 15 is as follows.
When the racket R hits the ball (not shown), it provides a kind of cushioning effect to the grip. In addition, since the polyurethane layer 15 can also provide excellent adhesiveness, it is possible to prevent the palm from slipping when the user hits the ball. On the other hand, the woven fabric layer 1
1 can enhance the strength of the polyurethane layer 15 and, as a kind of medium, the polyurethane layer 15 and the woven fabric layer 1
One string-like structure helps to smoothly adhere to the handle 10.

As described above, for a tennis racket or similar racket grip, the proportionality of the thickness of the polyurethane layer and the woven fabric layer used is increased and is employed in the grips of the known invention. If the ratio value is exceeded, the vibration absorption of the grip is greatly improved. In particular, the proportional value of the thickness of the polyurethane layer and the thickness of the woven fabric layer is at least about 0.18,
That is, it is desirable that it is about 0.18 or more. In the following table, the measurement results of the best ratio between the thickness of the polyurethane main body and the thickness of the woven fabric layer are submitted. If this result can be used for the structural design of the tennis racket grip, the best effect can be obtained.

[Table 1] In the embodiment shown in FIG. 4 and the best structure shown in FIG. 4, the total thickness of the grips is 2.0 mm, and the thicknesses of the polyurethane layer and the woven fabric layer are 1.1 mm and 0.9 mm, respectively. The thickness of the main body is approximately equal to the thickness of the woven fabric main body,
Or just a little thick. Structures with this ratio show very good effects.

As shown in FIG. 8, which shows a deformation state that occurs when the user's finger 40 grips the grip G of the present invention, the user's finger 40 presses the polyurethane layer 15,
It is making a big change. However, at this time, only a slight pressure is applied to the woven fabric layer 11. The increase in the pressing action on the polyurethane layer 15 is due to the vertical arrangement of the pores 21. This pressing action can significantly suppress the vibration phenomenon transmitted to the user's arm and palm via the racket when the ball collides with the racket. In addition, since the polyurethane layer 15 is pressed, the grip strength of the user can be enhanced. The adhesive property of the polyurethane achieves another effect of the present invention, that is, the object of cost reduction. This is the reason for employing a large amount of polyurethane. The difference in cost in this section is the reason that the cost of the grip manufactured in the embodiment of the present invention is much lower than that of the conventional product.

[0011]

According to the present invention, a woven fabric layer is adhered to a polyurethane layer having a cushioning property so as to enhance the strength of the polyurethane layer and to serve as a medium when combined with a racket handle. The ratio of the thickness of the polyurethane layer to the thickness of the woven fabric layer is at least 0.18 or more. At this time, the vibration absorption of the grip can be significantly improved. Further, the polyurethane layer includes pores, and the pores are perpendicular to the longitudinal end of the racket handle, which can further enhance the vibration absorbing function of the polyurethane layer. Furthermore, by employing a large amount of polyurethane, it is possible to significantly reduce the production cost by utilizing the adhesive properties of polyurethane.

[Brief description of the drawings]

FIG. 1 is a three-dimensional sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view of the bottom surface of the embodiment in FIG. 1;

FIG. 3 is an enlarged vertical sectional view taken along line 3-3 in FIG.

FIG. 4 is an enlarged view of a portion surrounded by a circle 4 in FIG.

FIG. 5 is a reduced stereoscopic view in which the grip of the present invention shown in FIGS. 1, 2, 3, and 4 is applied to a handle of a tennis racket.

FIG. 6 is an enlarged vertical sectional view taken along line 6-6 in FIG.

FIG. 7 is an enlarged view of a portion surrounded by a circle 7 in FIG.

FIG. 8 is a sectional view when a user grips the grip of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Handle 11 Woven cloth layer (felt layer) 13 Inner layer surface 15 Polyurethane layer 17 Upper surface layer (outer surface) 19 Lower surface 21 Pores 30 Normal layer (adhesive layer) 32 Protective tape 40 Finger

Claims (2)

[Claims] 1. A vibration-absorbing grip applied to a racket or the like, wherein the string-like structure is wound spirally around a handle, and the string-like structure is a woven cloth layer having an opening, and is smooth and closed. An inner surface of the woven fabric layer is adhered to a handle of a tennis racket, and the polyurethane layer is adhered to an upper surface layer of the woven fabric layer with a lower surface thereof. The polyurethane layer and the pores of the polyurethane layer extend in a state perpendicular to the longitudinal axis end of the handle, and the ratio of the thickness of the polyurethane layer to the center cross section of the woven fabric layer is about 0.18 or more. The woven fabric layer enhances the strength of the polyurethane layer. The polyurethane layer not only absorbs vibration and impact force, but also has a thickness of the string-like structure of 1.3-1.3.
When it is increased to 2.0 mm, at the same time, it is possible to provide a high adhesive force, thereby suppressing a slippage occurring between a palm and a hand of a user. It is arranged so as to become gradually thinner toward the side end from the center cross-sectional area, whereby the string-shaped structure is smoothly wound on a handle, and further provided with an adhesive tape along the inner layer surface of the woven fabric layer, A vibration absorbing grip applied to a racket or the like, characterized in that the string-like structure is fixed on a handle by this. 2. The vibration-absorbing grip according to claim 1, wherein the thickness of the polyurethane layer is substantially equal to the thickness of the woven fabric layer.