JP2002306641A - Golf club set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club set capable of exhibiting the required characteristic of each count at the maximum. SOLUTION: This golf club set includes a plurality of golf clubs having a head 2 mounted at the tip end of a shaft 1 and a grip 3 mounted at the bat end, wherein the loft angle X of the golf club is sequentially increased ranging from 20 to 45 degrees, with the change of the loft angle X of the golf club, the ratio of the distance L1 from the tip end of the shaft 1 to the position G of center of gravity of the shaft to the shaft total length L0 is varied, and the difference between the minimum value and the maximum value s set to 4% or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club set including a plurality of golf clubs having different loft angles, and more particularly, to a golf club set capable of maximizing a required characteristic for each count.

[0002]

2. Description of the Related Art An iron golf club set is provided with about ten clubs from a long iron to a short iron, and has different flight distances (several meters to about 200
The configuration is such that the club length and the loft angle are variously varied so that m) is obtained. Generally, in the iron golf club set, the loft angle is reduced as the club on the long side is reduced, and by increasing the club length, the flying distance is easily obtained, while the loft angle is increased as the club on the short side is increased, and By shortening the club length, it is easier to raise the ball, and the run is reduced to emphasize the direction.

A shaft used for a golf club constituting a conventional golf club set has a substantially constant ratio of the distance from the tip end to the position of the center of gravity of the shaft to the entire length of the shaft. Even when the position of the center of gravity changes, the difference between the minimum value and the maximum value of the ratio is within 3%. However, in the golf club set in which the position of the center of gravity of the shaft is set as described above, it is extremely difficult to maximize the required characteristics for each iron count from a long iron to a short iron.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a golf club set capable of maximizing the required characteristics for each count.

[0005]

According to the present invention, there is provided a golf club set including a plurality of golf clubs having a head mounted on a tip end side of a shaft and a grip mounted on a butt end side. In a golf club set in which the loft angle of these golf clubs increases sequentially in the range of 20 to 45 degrees, the total length of the shaft from the tip end of the shaft to the position of the center of gravity of the shaft with the change in the loft angle of the golf club , And the difference between the minimum value and the maximum value is 4% or more.

As described above, the ratio of the distance from the tip end of the shaft to the position of the center of gravity of the shaft with respect to the entire length of the shaft is greatly changed with the change in the loft angle of the golf club. Characteristics can be maximized.

More specifically, as the loft angle of the golf club increases, the ratio of the distance from the tip end of the shaft to the position of the center of gravity of the shaft relative to the entire length of the shaft is gradually increased, so that the position of the center of gravity of the golf club is increased. Will shift toward the grip. Therefore, in the golf club on the short side, it is difficult to feel the weight of the head at the time of swing, and it becomes easy to swing the golf club integrally with the body, so that the hitting directionality and the flight distance stability can be improved. On the other hand, for the long golf club, a flight distance equal to or greater than that of the conventional golf club can be obtained. As a result, it is possible to maximize the required characteristics for each count.

[0008]

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). Each golf club has a configuration in which a head 2 is mounted on a tip end side of a tubular shaft 1 and a grip 3 is mounted on a butt end side.

The golf clubs A3 to A9, PW, S
W is such that the loft angle X (°) becomes 20 as the count becomes larger.
The club length is set so as to gradually increase in the range of up to 45 degrees and to shorten the club length. That is, golf club A3 ~
A9, PW, and SW are set such that the greater the ball count, the shorter the ball flight distance. The loft angle X is an inclination angle of the face surface of the head 2 with respect to the shaft axis.

In the golf club set, as the loft angle X increases, the ratio (%) of the distance from the tip end of the shaft 1 to the position of the center of gravity of the shaft with respect to the entire length of the shaft gradually increases. That is, as shown in FIG. 2, the ratio (L ₁ / L ₀ × 1) of the distance L ₁ from the tip end of the shaft 1 to the position G of the center of gravity and the overall length L ₀ of the shaft.
00) gradually increases as the loft angle X increases. And in the above golf club set,
The difference between the minimum and maximum values of the ratio of the shaft total length L ₀ of the distance L ₁ is equal to or greater than 4%.

The means for adjusting the position of the center of gravity of the shaft 1 is not particularly limited. For example, a weight may be added to the butt portion of the shaft 1 so that the mass of the weight differs for each count. Good. As the weight body, a columnar or cylindrical weight body may be inserted into the bat portion, and when the shaft 1 is made of a fiber reinforced resin, a part of the prepreg in which the reinforcing fibers are impregnated with the resin is powdery or granular. The weight body may be embedded in the butt portion of the shaft 1 by mixing the weight body. In order to effectively adjust the mass of the shaft 1, the specific gravity of the weight body is preferably 7.5 or more. Such a weight body can be made of a metal such as tungsten.

As described above, the loft angle X of the golf club
As the ratio increases, the ratio of the distance L ₁ from the tip end of the shaft 1 to the shaft center of gravity G to the overall shaft length L ₀ gradually increases, so that the center of gravity of the golf club shifts toward the grip. In the golf club on the short side, the hitting directionality and the flight distance stability can be improved. In addition, since the required characteristics of the golf club on the short side are improved based on the change in the position G of the center of gravity of the shaft, it is possible to emphasize the flight distance performance by reducing the weight of the golf club on the long side.

In the above golf club set, the loft angle X
As the diameter increases, the outer diameter of the tip end of the shaft 1 may be gradually increased. By setting the outer diameter of the tip end of the shaft 1 as described above, in the golf club on the short side, the rigidity near the tip end of the shaft 1 is increased, so that the hitting directionality and flight distance stability are further improved. Can be. Also, in the golf club on the short side, if the tip end of the shaft 1 is made thicker, there is an advantage that a sense of security can be given to the golfer by a visual effect.

In the above-mentioned golf club set, the total mass of each golf club is not particularly limited, but the total mass of the golf club having the largest loft angle is 400 to 400.
The total mass of the golf club having the smallest loft angle is preferably 300 to 400 g. Setting within the above range makes it possible to provide a golf club set with further improved hitting ball directionality and flight distance stability.

In the present invention, the combination of the golf clubs constituting the golf club set is not particularly limited, and the set can be constituted by arbitrarily combining the required golf clubs. For example, in addition to the golf club shown in FIG. 1, it is possible to include an approaching wedge or the like.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a golf club set including a plurality of golf clubs, each golf club has a club length,
The loft angle, the total mass, the total shaft length, the mass of the base shaft, the mass of the weight added to the shaft butt, the mass of the shaft, and the ratio of the distance from the tip end of the shaft to the center of gravity of the shaft (referred to as the center of gravity of the shaft). ) Is set as shown in Tables 1 to 5
2 and the present invention sets 1 to 3 were produced.

With respect to these test sets, test hits were performed by five senior golfers, their flight distances were measured, and the amount of deviation of the ball from the center line was measured as an index of direction. The results were shown in Tables 1 to 5. Are also shown. The evaluation result of the flight distance was indicated by an index with the conventional set 2 being 100. The greater the index value, the greater the flight distance. In addition, the evaluation result of the directionality was represented by an index with the conventional set 2 being 100, using the reciprocal of the measured value. The larger the index value, the better the directionality.

[0019]

[Table 1]

[0020]

[Table 2]

[0021]

[Table 3]

[0022]

[Table 4]

[0023]

[Table 5]

As apparent from Tables 1 to 5, short irons of sets 1 to 3 according to the present invention are the same as those of conventional sets 1 to 3.
The directionality is better than the short iron of No. 2 and the long irons of the present set 1 to 3 are the same as those of the conventional set 1
A flight distance equal to or greater than that of the long iron of ~ 2 was obtained.

[0025]

As described above, according to the present invention, the golf club includes a plurality of golf clubs each having a head mounted on the tip end side of the shaft and a grip mounted on the butt end side. In a golf club set that sequentially increases in the range of 20 to 45 degrees, with the change in the loft angle of the golf club, the ratio of the distance from the tip end of the shaft to the position of the center of gravity of the shaft to the entire length of the shaft is changed. Since the difference from the maximum value is 4% or more, the hitting direction and flight distance stability of the golf club on the short side are improved, and the flight distance of the golf club on the long side is extended, so that the required characteristics for each count are maximized. It can be demonstrated as much as possible.

[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 shaft of a typical golf club in the golf club set of the present invention.

[Explanation of symbols]

Reference Signs List 1 shaft 2 head 3 grip A3-A9, PW, SW golf club G shaft center of gravity position L ₀ total shaft length L ₁ distance from tip end to shaft center of gravity position X loft angle

Claims (2)

[Claims] 1. A golf club comprising: a plurality of golf clubs each having a head mounted on a tip end side of a shaft and a grip mounted on a butt end side, wherein the golf club has a loft angle of 20 to
In a golf club set that sequentially increases in the range of 45 degrees, the ratio of the distance from the tip end of the shaft to the position of the center of gravity of the shaft with respect to the entire length of the shaft changes with the change in the loft angle of the golf club. A golf club set wherein the difference from the maximum value is 4% or more. 2. The ratio of the distance from the tip end of the shaft to the position of the center of gravity of the shaft to the entire length of the shaft gradually increases as the loft angle of the golf club increases. Golf club set.