JP2002052104A - Golf club shaft and golf club having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel golf club shaft which consists substancially of a steel shaft, but having the characteristics of a carbon shaft and the golf club having this shaft. SOLUTION: The golf club shaft 1 includes a carbon shaft segment 7 in part in the longitudinal direction of the steel shaft 3. The carbon shaft segment 7 may be disposed on a tip side 5 of the steel shaft 3 and may be disposed on a grip side or in an intermediate segment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club shaft and a golf club.

[0002]

2. Description of the Related Art Golf club shafts are made of steel.
There are types such as carbon and boron. A steel shaft has a small torque so that it is less likely to shake left and right during a shot, but a relatively large weight tends to make the golf club itself heavier. Accordingly, skilled golfers, such as professional golfers, tend to prefer steel shafts that are less likely to shake during shots.

[0003] On the other hand, the shaft made of carbon has a feature that the torque can be easily adjusted and the weight is light. Therefore, by increasing the torque, the deflection of the shaft is increased.
Even beginners and elderly people with low head speed can gain distance.

[0004]

However, recently, amateur golfers who prefer to use steel shafts like professional golfers have been increasing, and there has been a demand for the appearance of shafts having a longer flight distance even with steel shafts.

SUMMARY OF THE INVENTION The object of the present invention is to provide a new golf club shaft having the characteristics of a carbon shaft while being based on a steel shaft, and a golf club having the shaft. is there.

[0006]

In order to achieve the above object, a golf club shaft according to a first aspect of the present invention is characterized in that a carbon shaft portion is included in a part of a steel shaft in a longitudinal direction. According to the present invention, the weight of the shaft can be reduced by the amount including the carbon shaft portion. Also, since the torque of the carbon shaft part can be set relatively freely, the carbon shaft part with a large torque is applied to beginners and weak golf players, and the carbon shaft part with a small torque is used for players who value the direction of flight. Can be applied.

The invention according to claim 2 of the present application is characterized in that, in claim 1, the carbon shaft portion is provided on the tip side of the steel shaft. According to the present invention, since the carbon shaft portion is provided in a portion close to the head, the influence of the magnitude of the torque of the carbon shaft portion is likely to directly affect the head, and therefore, when a carbon shaft portion having a large torque is applied, it is difficult for beginners. Is a golf club that can extend the flight distance by high repulsion.

The invention according to claim 3 of the present application is characterized in that, in claim 1, the carbon shaft portion is provided on a grip side of the steel shaft. According to the present invention, a golf club shaft having the same characteristics as a steel shaft as a whole can be provided, but there is an advantage in that the entire shaft can be reduced in weight.

The invention according to claim 4 of the present application is characterized in that, in claim 1, the carbon shaft portion is provided at an intermediate portion of the steel shaft. ADVANTAGE OF THE INVENTION According to this invention, the intermediate part of a shaft can be reduced in weight, and it becomes possible to design a golf club with a longer flight distance by allocating the corresponding weight to the grip side and the head side.

According to a fifth aspect of the present invention, in the second aspect, the carbon shaft portion is provided on a tip side of a portion corresponding to the first step of the steel shaft. It is.
ADVANTAGE OF THE INVENTION According to this invention, the shaft provided with the structure of the same step as the conventional steel shaft can be provided.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, a part of the carbon shaft portion is fixed while being inserted into the steel shaft. It is assumed that. ADVANTAGE OF THE INVENTION According to this invention, a step can be produced between a steel shaft and a carbon shaft part, and also it becomes possible to fix a carbon shaft part to a steel shaft reliably.

The invention according to claim 7 of the present application is characterized in that, in any one of claims 1 to 6, the carbon shaft portion is surface-treated in the same color as the steel shaft. ADVANTAGE OF THE INVENTION According to this invention, since the boundary of a steel shaft and a carbon shaft part is difficult to understand, it can give an external appearance like a steel shaft as a whole.

The invention according to claim 8 of the present application is characterized in that, in any one of claims 1 to 6, the carbon shaft portion is surface-treated in a color different from that of the steel shaft. ADVANTAGE OF THE INVENTION According to this invention, the existence of the carbon shaft part is clarified, and the shaft which has the external appearance which does not exist conventionally can be provided.

According to a ninth aspect of the present invention, there is provided a wood golf club comprising the golf club shaft according to any one of the first to eighth aspects. According to the present invention, it is possible to reduce the weight of the shaft portion, and to impart a large torque to the carbon shaft portion, thereby bending the shaft and increasing the repulsive force of the head against the ball, thereby increasing the flight distance. it can.

According to a tenth aspect of the present invention, there is provided an iron golf club including the golf club shaft according to any one of the first to eighth aspects.
According to the present invention, it is possible to reduce the weight of the shaft portion, and to impart a large torque to the carbon shaft portion, thereby bending the shaft and increasing the repulsive force of the head against the ball, thereby increasing the flight distance. it can.

According to an eleventh aspect of the present invention, there is provided a putter comprising the golf club shaft according to any one of the first to eighth aspects. ADVANTAGE OF THE INVENTION According to this invention, since it has a carbon shaft part, it bends a little when hitting a ball, it is easy to grasp the sense of distance of a pad, and the hit feeling when hitting a ball is comfortable.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a golf club shaft 1 according to the present invention. The golf club shaft 1 mainly includes a steel shaft 3, and a carbon shaft portion 7 is provided on the tip side 5 side of the steel shaft 3.

The golf club shaft 1 has a tip side 5
Twelve steps 9 are formed from the side, and in the present embodiment, the carbon shaft portion 7 is on the tip side from the first step 9A. Of course, the length of the carbon shaft portion 7 can be longer or shorter than the length corresponding to the first step 9A.

As shown in FIG. 2, the joint portion 11 between the steel shaft 3 and the carbon shaft portion 7 has a base end side of the carbon shaft portion 7 inserted into the distal end side of the steel shaft 3 for a predetermined length (for example, about 10 cm). The structure is such that the overlapping portions are fixed using an adhesive.
With such a structure, the carbon shaft portion 7 extends from the tip of the steel shaft 3, and a step is generated at the boundary by the thickness of the steel shaft 3, which constitutes a first step 9 A of the golf club shaft 1.

In the above embodiment, the carbon shaft portion 7 is provided on the tip side 5 side, but may be provided on the grip side 6 side of the steel shaft 3 as shown in FIG. 3 or as shown in FIG. May be provided at an intermediate portion of the steel shaft 3.

Since the golf club shaft 1 appears to be a shaft made of steel as a whole, the carbon shaft portion 7 can be surface-treated in the same metal color as the steel shaft 3. Further, the carbon shaft portion 7 may be left in the color of carbon, that is, black, or may be dyed or painted with carbon so as to positively recognize that the golf club shaft 1 is a composite of steel and carbon. The surface treatment may be performed in different colors.

FIG. 5 shows a wood golf club 12 provided with the golf club shaft 1 of the present invention having the above-described structure. FIG. 6 shows an iron golf club 13 including the golf club shaft 1 of the present invention. The wood golf club 12 or the iron golf club 13 provided with the golf club shaft 1 of the present invention can reduce the torque of the steel shaft portion 3 but can freely change the torque of the carbon shaft portion 7. The carbon shaft portion 7 having a large torque can be employed as the club.

Since the wood club 12 or the iron golf club 13 includes the carbon shaft portion 7 in a part of the shaft, the weight of the shaft portion can be reduced, and the shaft is bent by the large torque of the carbon shaft portion 7. Thus, the repulsive force of the head against the ball can be increased to increase the flight distance. FIG.
In the golf club shown in FIG. 6, since the grip side 6 is made of steel, the torsion of the shaft at that portion is small, and the trajectory deviation is small as compared with a shaft made entirely of carbon.

FIG. 7 shows a putter 15 provided with the golf club shaft 1 of the present invention. Since the putter 15 including the golf club shaft 1 of the present invention includes the carbon shaft portion 7, it slightly bends when hitting a ball, so that it is easy to grasp the sense of distance of the putt and the hit feeling when hitting the ball is comfortable.

Also, in the golf club shaft 1 of the present invention, various carbon shaft portions 7 having different torques are prepared in advance, so that the wood club 12 or the iron golf club 13 does not have a sufficient flight distance or the trajectory has a poor directivity. If it is not good, the flight distance can be increased and the directionality can be corrected by changing to another carbon shaft portion 7 having a different torque.

[0026]

According to the present invention, the weight of the shaft can be reduced by the amount including the carbon shaft portion. Also, since the torque of the carbon shaft part can be set relatively freely, the carbon shaft part with a large torque is applied to beginners and weak golf players, and the carbon shaft part with a small torque is used for players who value the direction of flight. Can be applied.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a golf club shaft of the present invention.

FIG. 2 is a cross-sectional view showing an example of a structure of a joint between a steel shaft and a carbon shaft portion of the golf club shaft of the present invention.

FIG. 3 is a front view of a golf club shaft showing an embodiment in which a carbon shaft portion is provided on a grip side of a steel shaft.

FIG. 4 is a front view of a golf club shaft showing an embodiment in which a carbon shaft portion is provided in an intermediate portion of a steel shaft.

FIG. 5 is a perspective view showing a wood golf club including the golf club shaft of the present invention.

FIG. 6 is a perspective view showing an iron golf club including the golf club shaft of the present invention.

FIG. 7 is a perspective view showing a putter including the golf club shaft of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Golf club shaft 3 Steel shaft 5 Tip side 7 Carbon shaft part 9 Step 9A First step 11 Joint 12 Wood golf club 13 Iron golf club 15 Putter

Claims (11)

[Claims] 1. A golf club shaft comprising a carbon shaft portion in a part of a steel shaft in a longitudinal direction. 2. The golf club shaft according to claim 1, wherein the carbon shaft portion is provided on a tip side of the steel shaft. 3. The golf club shaft according to claim 1, wherein the carbon shaft portion is provided on a grip side of the steel shaft. 4. The golf club shaft according to claim 1, wherein the carbon shaft portion is provided at an intermediate portion of the steel shaft. 5. The golf club shaft according to claim 2, wherein the carbon shaft portion is provided closer to a tip side than a portion corresponding to the first step of the steel shaft. 6. The golf club shaft according to claim 1, wherein a part of the carbon shaft portion is fixed in a state inserted into the steel shaft. 7. The golf club shaft according to claim 1, wherein the carbon shaft portion is surface-treated in the same color as the steel shaft. 8. The golf club shaft according to claim 1, wherein the carbon shaft portion is surface-treated in a color different from that of the steel shaft. 9. A wood golf club comprising the golf club shaft according to claim 1. 10. An iron golf club comprising the golf club shaft according to claim 1. 11. A putter comprising the golf club shaft according to claim 1.