JPH02265578A - Golf club set - Google Patents

Abstract

PURPOSE:To improve a defect of rapid return and obtain precise directionality in short-distant clubs of large club numbers by setting the weights of the shafts all equal or in such a manner that they are successively increased as the club numbers are increased and the shafts are shortened. CONSTITUTION:In a set of golf clubs using shafts made of fiber reinforced plastics, the weights of the shafts are set all equal or in such a manner that they are successively increased as the club numbers are increased and the shafts are shortened. According to this constitution, torsional rigidity of each shaft is increased as the club number is increased, so that the rotation of the club head can be easily restrained. Further, when this constitution is adapted, the weight of the club head is naturally lightened for reasons of balance of the whole club, the inertia is also reduced, and the rotation of the club head can be more effectively restrained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a golf club set comprising a plurality of clubs of different counts each using a shaft made of delicate reinforced plastic.

Prior Art and Problems of the Invention A golf club set is made up of a plurality of clubs with different counts, and the clubs with the higher counts are set so that the ball hits higher and hits the ball shorter.

The material of the shaft is steel or fiber reinforced plastic. Compared to steel clubs, fiber-reinforced plastic clubs have the advantage that they are lighter and can provide longer distances for small clubs, but they have the advantage of being able to return quickly for large clubs, that is, the club head The disadvantage is that the rotation around the shaft is fast, making it difficult to determine the direction.

Therefore, the object of the present invention is to eliminate the drawbacks of golf club sets using shafts made of fiber-reinforced plastic.

In order to solve this problem, the inventor of the present invention analyzed the above-mentioned phenomenon of "quick return" as follows.

When you swing a golf club, the club head simultaneously rotates around the shaft. Note that this rotation of the club head is incidental to the swing motion, and it is impossible to control only this rotation. Therefore, at the moment of hitting the ball, the club head has rotational speed and momentum. In order to improve the directional stability of the ball, it is desirable that the speed and momentum of this rotation be small. If the shaft is made of steel, the torsional rigidity of the shaft is high, so
By holding the grip with your hand, the speed and momentum of this rotation are not excessive, and sufficient directional stability is obtained. If the shaft is made of fiber-reinforced plastic, the torsional rigidity of the shaft is extremely small, 1/2.5 to 1/4 of that of a steel shaft, so the movement from the start of the swing to the moment of hitting the ball The large rotational speed and momentum naturally given to the club head cannot be suppressed even if you hold the grip in your hands at the moment you hit the ball, so the club head hits the ball in that state due to inertia, causing the ball to hit the ball. direction becomes unstable.

Means and operation for solving the problem Therefore, in order to solve this problem, the rotation or inertia of the club head about the shaft axis may be suppressed as the club number increases.

That is, the present invention provides a golf club set using shafts made of fiber-reinforced plastic, in which the weights of the shafts are all set to be the same, or to increase in size as the club count increases and the shaft becomes shorter. It is a set.

According to this configuration, the torsional rigidity of the shaft increases as the club number increases, so rotation of the club head can be easily suppressed. Furthermore, by adopting this configuration, the weight of the club head will be lighter than before, in order to maintain the balance of the entire club, and the inertia will also be reduced, suppressing the rotation of the club head more effectively. Ru.

Example The present invention will be specifically described below with reference to Examples.

Table 1 below shows a golf club set according to the present invention, and Table 2 shows a conventional golf club set for comparison. These are all sets of iron clubs, number 3,
...No. 9, pitching wedge, sand wedge (pw.

Represented by SW.

club count SW SW Table 1 shaft Length 2 38.25 37.75 37.25 36.75 36.25 35.75 35.25 34.75 34.25 shaft Heavy ft ).

Head weight 1 Z2.43 Club Table 2 Shaft Shaft Head 3 38.25 70 2434
37.75 68.5 2505 37.25
67 2576 36.75 65
．． 5 2647 36.25 64 2
718 35.75 62.5 2789
35.25 61 285PW 3
4.75 59.5 292SW 34.2
5 58 299 In these tables, looking at the shaft weight, in the present invention, the number 3 club has a weight of 45
The weight of a sandwich wedge is 125 grams, and the weight is gradually increasing. On the other hand, in the conventional example, a number 3 club weighs 70 grams, but a sand wedge weighs 5 grams.
8 grams and is gradually decreasing. This is because the club with a larger number has a shorter shaft length, so the weight naturally decreases in the conventional example, whereas in the present invention, the wall thickness is gradually increased. As a result, in the present invention, the torsional rigidity of the shaft is gradually increased.

Furthermore, when looking at the head weight, it gradually increases as the club count increases on both sides, but while the No. 3 club weighs the same 243 grams on both sides, the sand wedge's weight increases to 259 grams with the present invention, which is 16 grams. In contrast, the conventional example has a weight of 299 grams, an increase of 56 grams. That is, in the present invention, the inertia of the club head does not become excessive even if the club number increases.

Although not shown in the table, the weight of the grip is 46 grams for each club in the present invention, 38 grams for each club in the conventional example, and the weight of the socket is 4 grams for each club on both sides.

As shown in the above tables, the length of the shaft generally becomes shorter as the number of the club increases, so if you gradually increase the weight of the shaft, of course, even if all the weights are equal, the weight per length of the shaft becomes shorter. increases, so the torsional stiffness of the shaft increases.

Note that even if the weight of the shaft is gradually reduced, if the weight per length of the shaft does not decrease, an increase in torsional rigidity will be achieved. Stops at things that are clear.

Effects of the Invention As mentioned above, the fiber-reinforced plastic golf club set of the present invention is capable of better suppressing rotation due to inertia of the club head that occurs when swinging, by gripping the grip of a large club. It is something to do.

Therefore, in a close-range club with a large number, the conventional drawback of rapid return can be prevented, and accurate directionality can be obtained. Also, of course, the advantage of the fiber-reinforced plastic shaft, which is that a club with a small club count can achieve a large flight distance, is not lost.

Claims (1)

[Claims] 1. A golf club set using shafts made of fiber-reinforced plastic, in which the weights of all the shafts are set to be the same, or to increase in size as the club count increases and the shafts become shorter.