JP2001231888A - Golf club and golf club set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club and a golf club set capable of improving the directional control and the carry of a hit ball by setting the head size appropriately. SOLUTION: The golf club set includes plural golf clubs A3-A9, PW, and SW. A head 2 is mounted at the top of the shaft S of each club, and the loft angle of the face 3 of the head 2 is different among the golf clubs in the golf club set. When the loft angle X is in the range from 20 to 30 degrees, the forward moving quantity FP of the leading edge of the face 3 to the shaft line S1 is 5-20 mm, and the backward moving quaintly GR of the gravity center G of the head 2 to the shaft line S1 is 5-10 mm, the distance GL between the gravity center G of the head 2 and the shaft line S1 is 20-35 mm, and the height GH of the crossing point of a vertical line from the gravity center G of the head 2 to the face 3 and the face 3 is 11-21 mm. As the loft angle X becomes larger, the forward moving quantity FP becomes smaller and the backward moving quantity GR becomes larger gradually.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club and a golf club set having appropriately set head dimensions, and more particularly to a golf club and a golf club set having improved hitting direction and flight distance.

[0002]

2. Description of the Related Art An iron golf club set includes about ten irons ranging from a long iron to a short iron, and has various club lengths and loft angles so that different counts have different flight distances (several meters to about 200 m). Configuration.

[0003] Generally, an iron golf club has a smaller iron count, a longer iron club has a smaller loft angle and a longer club length to make it easier to obtain a flight distance, while a shorter iron club has a larger iron count. By increasing the loft angle and shortening the club length,
It makes it easier to raise the ball and reduces the number of runs to emphasize the direction.

In the above golf club set, head dimensions such as face progression are gradually changed between clubs, but not all clubs are necessarily set to optimal dimensions. Therefore, especially in long irons, the sweet spot is too high and it is difficult to lift the ball,
The distance between the center of gravity of the head and the axis of the shaft is too long, causing a problem that the ball easily goes to the right.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a golf club and a golf club set capable of improving the hitting direction and the flight distance by appropriately setting the head dimensions.

[0006]

According to the present invention, there is provided a golf club in which a head is mounted on a tip portion of a shaft, and a loft angle of a face surface of the head is set to 20 to 3 degrees.
In a golf club having a range of 0 °, the advance amount FP of the leading edge of the face surface with respect to the shaft axis is 5 to 20 mm, the retreat amount GR of the center of gravity of the head with respect to the shaft axis is 5 to 10 mm, and the center of gravity of the head is GL between the shaft axis and the shaft axis is 20 to 35 mm
And the height GH of the intersection of a perpendicular line drawn from the center of gravity of the head to the face surface and the face surface is 11 to 21 m.
m.

[0007] In a golf club called a so-called long iron having a loft angle in the range of 20 to 30 °, the head size is set to an optimum value, so that the flight distance can be increased while improving the hitting directionality. Becomes possible.

A golf club set according to the present invention for achieving the above object includes a plurality of golf clubs in which a head is mounted on a tip of a shaft and a loft angle of a face surface of the head is variously changed. In the golf club set, when the loft angle is in the range of 20 to 30 °,
The amount of advance FP of the leading edge of the face surface with respect to the shaft axis is 5 to 20 mm, the amount of retreat GR of the center of gravity of the head with respect to the shaft axis is 5 to 10 mm, and the distance GL between the center of gravity of the head and the shaft axis is 2
0 to 35 mm, the height GH of the intersection of a perpendicular line drawn down from the center of gravity of the head to the face surface and the face surface is set to 11 to 21 mm, and the advance amount FP increases as the loft angle increases. Is gradually reduced, and the retreat amount GR is gradually increased.

By setting the head size of a so-called long iron having a loft angle in the range of 20 to 30 ° to an optimum value, and configuring the golf club set based on this, the set is set. As a whole, the hit ball directionality and the flight distance can be improved. In particular, as the loft angle increases, the distance GL may be gradually reduced, and the height GH may be gradually increased. When the height GH is gradually increased as the loft angle increases, the hitting direction of a golf club, called a so-called short iron, can be further improved.

Although the golf club set of the present invention includes various wedges such as sand wedges and pitching wedges in addition to the 3rd to 9th irons as the golf club, it is not always necessary to apply the above head dimensions to all of them. The portion may include a golf club that is not applicable.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 illustrates a golf club set according to an embodiment of the present invention.
A9 (No. 3 to 9 irons), a golf club PW (pitting wedge), and a golf club SW (sand wedge). In each golf club, a grip 1 is attached to a rear end of the shaft S,
The head 2 is attached to the tip.

The golf clubs A3 to A9, PW, S
W is set so that the loft angle X (°) increases and the club length decreases as the count increases. That is, the golf clubs A3 to A9, PW, and SW are set such that the greater the ball count, the shorter the hit ball flight distance. For example, golf clubs A3 to A9, PW, S
The loft angle X of W is 20 °, 23 °, 26 °, 29 °,
The angles are set to 33 °, 37 °, 41 °, 46 °, and 56 °.

FIGS. 2 and 3 show the dimensions of the head according to the present invention. However, FIG. 2 is a side view showing a state in which the head is arranged on a horizontal plane H so as to have a predetermined loft angle X, and FIG. 3 is a perspective view of the head viewed from the shaft axis direction. As shown FIG. 2, face forward amount FP is the forward amount for the shaft axis lines S ₁ of the leading edge of the face 3. Centroid retraction amount GR is retraction amount relative to the shaft axis lines S ₁ of the center of gravity G of the head 2. As shown in FIG. 3, the center of gravity distance GL is the distance between the center of gravity G and the shaft axis lines S ₁ of the head 2. As shown in FIG. 2, the height GH of the center of gravity is the height of the intersection (sweet spot) between the perpendicular line drawn from the center of gravity G of the head 2 to the face surface 2 and the face surface 2 with respect to the horizontal plane H.

In the above golf club set, golf clubs A3 to A3 having a loft angle X in the range of 20 to 30 °.
6, the face advance amount FP is set in the range of 5 to 20 mm, the center of gravity retreat amount GR is set in the range of 5 to 10 mm, the center of gravity distance GL is set in the range of 20 to 35 mm,
The height GH of the center of gravity is set in a range of 11 to 21 mm. Moreover, all golf clubs A3 to A9, PW, S
W indicates that as the loft angle X increases, the face advance amount FP gradually decreases, the center of gravity retreat amount GR gradually increases, the center of gravity distance GL gradually decreases, and the center of gravity height G
H is set to gradually increase. However, for the center of gravity distance GL and the center of gravity height GH, substantially the same value may be set for all golf clubs.

In the above golf club set, golf clubs A3 to A3 having a loft angle X in the range of 20 to 30 °.
The long iron 6 can increase the flight distance because the face advance amount FP is large, the center of gravity height GH is low, and the ball can be easily raised. Further, since the center-of-gravity receding amount GR and the center-of-gravity distance GL are set in the optimum ranges, variation in hitting ball to the left and right hardly occurs, and the directionality is excellent.
If the face advance amount FP and the center-of-gravity height GH are out of the above ranges, the effect of increasing the flight distance becomes insufficient, and if the center-of-gravity retreat amount GR and the center-of-gravity distance GL are out of the above ranges, good directionality cannot be obtained.

In the golf club set, based on the set value of the long iron, as the loft angle X increases, the face advance amount FP gradually decreases, the center of gravity retreat amount GR gradually increases, and the distance increases. Since the GL is gradually reduced, the overall set is superior to the conventional golf club set in terms of directionality and flight distance. In particular, when the height GH is gradually increased as the loft angle increases, the shortness of the golf clubs A7 to A9, PW, and SW increases the spin rate of the ball due to the gear effect to improve the directivity. And reduce the number of runs after impact.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a golf club set including a plurality of golf clubs having variously different loft angles on a face surface,
The amount of advance FP of the leading edge of the face surface with respect to the shaft axis, the amount of retreat GR of the head center of gravity with respect to the shaft axis, the distance GL between the head center of gravity and the shaft axis, and the intersection of the perpendicular drawn from the head center of gravity to the face surface and the face surface The conventional sets 1 and 2 and the present sets 1 and 2 in which the height GH was set as shown in Tables 1 to 4 were manufactured.

With respect to these test sets, test hits were performed by five senior golfers, and the launch angle, the spin amount immediately after hitting the ball, and the flight distance were measured, and the deviation amount of the ball from the center line was measured as an index of direction. The results are shown in Tables 1 to 4. Launch angle, spin rate,
The evaluation result of the flight distance was indicated by an index with the conventional set 1 being 100. The larger the index value, the larger the measured values of launch angle, spin amount, and flight distance. In addition, the evaluation result of the directionality uses the reciprocal of the measured value,
Is indicated by an index with 100 as an index. The larger the index value, the better the directionality.

[0020]

[Table 1]

[0021]

[Table 2]

[0022]

[Table 3]

[0023]

[Table 4]

As is clear from Tables 1 to 4, the long irons of the sets 1 and 2 of the present invention easily lifted the ball, so that the flight distance was large and the directionality was good. In addition, the short irons of sets 1 and 2 of the present invention had a large spin rate and good controllability.

[0025]

As described above, according to the present invention, since the face advance amount FP, the center-of-gravity retreat amount GR, the center-of-gravity distance GL, and the center-of-gravity height GH are set to optimal values, the hitting directionality is good with a long iron. In the case of a short iron, it is possible to increase the spin amount of the ball and improve the hitting direction.

[Brief description of the drawings]

FIG. 1 is a side view showing a part of a plurality of iron golf clubs constituting a golf club set according to an embodiment of the present invention;

FIG. 2 is a side view showing a state where the heads of the golf clubs constituting the golf club set of the present invention are arranged on a horizontal plane so as to have a predetermined loft angle.

FIG. 3 is a perspective view of the head of the golf club constituting the golf club set of the present invention as viewed from the shaft axis direction.

[Explanation of symbols]

Reference Signs List 1 grip 2 head 3 face S shaft S ₁ shaft axis A3 to A9, PW, SW golf club H horizontal plane G center of gravity X loft angle FP face advance amount GR center of gravity retreat GL center of gravity distance GH center of gravity height

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masaki Akie 2-1 Oiwake, Hiratsuka-shi, Kanagawa F-term in Yokohama Rubber Co., Ltd. Hiratsuka Works (reference) 2C002 AA03 CH01 CH08 LL01 SS04

Claims (4)

[Claims] 1. A golf club in which a head is mounted on a tip portion of a shaft and a loft angle of a face surface of the head is set in a range of 20 ° to 30 °, wherein an amount of advance FP of a leading edge of the face surface with respect to a shaft axis is determined. 5 to 20 mm, the retreat amount GR of the center of gravity of the head with respect to the shaft axis is 5 to 10 mm, and the distance GL between the center of gravity of the head and the shaft axis is 2
A golf club having a height of 0 to 35 mm and a height GH of an intersection of a perpendicular line drawn from the center of gravity of the head to the face and the face. 2. A golf club set including a plurality of golf clubs having a head attached to a tip portion of a shaft and having various loft angles on a face surface of the head, wherein the loft angle is in a range of 20 ° to 30 °. , The amount of advance FP of the leading edge of the face surface with respect to the shaft axis is 5 to 20 mm, the amount of retreat GR of the center of gravity of the head with respect to the shaft axis is 5 to 10 mm, and the distance between the center of gravity of the head and the shaft axis GL 20 to 3
5 mm, and the height GH of the intersection of a perpendicular drawn from the center of gravity of the head to the face surface and the face surface is 11 to 11
21. A golf club set in which the advance amount FP is gradually reduced and the retreat amount GR is gradually increased as the loft angle increases. 3. The golf club set according to claim 2, wherein the distance GL is gradually reduced as the loft angle increases. 4. The golf club set according to claim 2, wherein the height GH is gradually increased as the loft angle increases.