JP2648811B2 - Golf club set - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a golf club set including a plurality of golf clubs.

[Conventional technology]

The golf club in the conventional golf club set is the fourth golf club.
As shown in FIG. 5 and FIG. 5, the distance y between the axis X passing through the axis of the shaft 1 and the line X ′ passing through the hit point H of the face of the head 2 and parallel to the axis X (the hit point H is the axis X Is negative before and positive after)), but in a general wood club including a club having a loft angle of less than 18 °, y = −5−−.
It was about 20 mm. Y = -1 to 5mm for iron club
It was about. For example, Wood number 1, 3, 4, 5,
No. (represented by W1, W3, W4, and W5, respectively), irons 3 to 9 (represented by I3 to I9, respectively), and a pitching wedge (PW), a golf club set consisting of a total of 12 The value distribution was as shown in the graph of FIG.

In order to obtain the value of y, as shown in FIGS. 11 (a) and (b) to FIGS. 15 (a) and (b), when viewed from the flying ball direction, ie, the axis X of the shaft 1 In a view of the plane perpendicular to the horizontal plane S, the bottom contour of the head 2 is a ground point (a ground point with respect to the horizontal plane S) in this projection view.
, A ground point is selected so as to be substantially symmetrical in the maximum range with respect to a straight line orthogonal to the horizontal plane S, and a hit point H is obtained with the club set. Then, the value of y is obtained. The setting state of such a club is the same as the state in which the predetermined lie and loft angles are obtained.

[Problem to be solved]

In a conventional golf club having a loft angle of less than 18 °, y = −
The range was 5 to -20 mm, and when an amateur golfer hit a ball using this club, the hit ball was likely to become a sliced ball. This is because the amateur golfer swings consciously to catch the ball at the shaft axis 1, that is, at a point on or near the grip extension, so that the hit point H is located before the shaft axis 1. You will hit the ball sooner.
That is, since the impact precedes the preparation for aiming the face at the target, the face enters the impact with the face opened. At this time,
As shown in FIG. 9, even if the head 2 enters along the direction of the flying ball line Z, slice rotation is given to the ball. In addition, the rotation of the wrist (the rotation of the head around the shaft axis 1 and the rolling rotation) occurs during the swing, and the speed v of the hit point H due to the rotation of the wrist acts to give a slice rotation to the ball. This v is obtained by v = rω (r is the distance from the center of the rolling rotation to the hit point H, and ω is the rotational angular velocity). The second to fix the sliced ball
As shown in Fig. 10, if you consciously close the face and try to catch the ball slightly, it will be slightly hooked, but it is difficult for amateurs. Professional golfers and advanced players are well aware of the difference between wood and iron, and adjust their use of wood and iron based on intuition and experience. However, in the case of amateur golfers, most of them are the same clubs for both wood and iron, and they cannot be used dexterously like professionals. When a wood club is used, sliced balls are likely to appear.

In view of the above, an object of the present invention is to provide a golf club set that is effective in preventing occurrence of an extreme slice ball, focusing on the above-described distance y in a club.

[Means for solving the problem]

In order to achieve the above object, in the present invention, the distance between the axis passing through the axis of the shaft and the hit point of the head face on the front view directly facing the golfer is defined as y,
If the hit point is before the axis and negative, and the hit point is after the axis is positive, y> −3 mm is set for the club with a loft angle less than 18 ° during the set, and each club in the set is adjacent to the club. The value of the distance y between the numbers of the clubs is monotonously increased or decreased as the number of the club increases within a range of 5 mm or less.

[Action]

According to the present invention, in a club having a loft angle of less than 18 °, y
Is within a range larger than −3 mm, the generation of thrust balls by conventional clubs having a loft angle of less than 18 ° can be suppressed in these clubs. When a golfer swings, the number of rotations of the wrist (more precisely, the number of rotations of the shaft)
And the speed of the hit point H (distance r × from the center of rotation to the hit point H ×
When the rotational angular velocity ω) is 500 rpm and 40 m / sec, respectively,
When you swing to hit the ball on the shaft axis, y
= In a golf club of -20 mm, the head 2 catches the ball about 1/2000 second earlier, and catches the ball with the face open at about 1.5 mm. However, in a golf club of y> -3 mm, it is roughly on the shaft axis. Alternatively, since the ball can be caught at one point behind it, the face becomes straight or close, and thrust can be prevented.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, the distance between an axis X passing through the axis of the shaft 1 of the golf club and a line X ′ passing through the hit point H of the face of the head 2 and parallel to the axis X is a front view directly facing the golfer. The distance between the two at the top, in other words, the shortest distance on the plane projected to the front, is defined as y, and when the hit point H is before the axis X, it is negative, and when it is after, it is positive. Then, the y of the club having a loft angle of less than 18 ° during the setting was set to a range larger than −3 mm. The golf club shown in FIG. 1 is a so-called wood club in a conventional concept, and y is set to +. Here, the hit point H is a geometric hit point, and when the height from the hit point H to the sole of the head 2 is h, h = A (1−sin θ) + α, and θ indicates a loft angle; A is a large ball (radius 21.4
mm), α indicates a lawn height of 2.5 mm. In FIG. 1, reference sign Z indicates the direction in which the ball B projects. When obtaining the hitting point H, the golf club is set in a state where the angles of the loft and the lie of the golf club are measured. If the sole is almost flat, this flat part is grounded to the horizontal plane S. If not, for example, as shown in FIGS.
The center line 3A of the face is orthogonal to the horizontal plane S, and the height a,
When a is the same height, the angle between the axis X and the horizontal plane S,
That is, the lie angle β is obtained. In addition, when the head 2 has various shapes, the head 2 described above with reference to FIGS.
The club is set as shown in FIGS. Also, when the axis X in the front view facing the golfer is orthogonal to the horizontal plane S, and the sole of the head 2 is in contact with the horizontal plane S and the hitting portion 3 is orthogonal to the plane in the front view, the hit point H is set to the center. The hit point H is obtained in a state where the hit point H is on the line 3, and the inclination of the hitting portion 3 with respect to a line X 'passing through the hit point H, that is, the loft angle θ is set. When swinging with the club having the above-described structure, the speed v of the hit point H due to the rotation of the wrist (rolling rotation) acts to give the ball a hook rotation.

In the set of the present invention, a club having a loft angle of less than 18 ° exists in a range indicated by reference numeral 10 in FIG. 7, and y> −3 mm. In the present invention, it is not necessary to distinguish between wood and iron. In FIG. 7, the clubs indicated by reference numeral 20 are set so that the value of y between adjacent numbers of each club monotonically increases, and the graph indicated by reference numeral 30 is set so as to decrease monotonously.

〔effect〕

As described above, according to the present invention, when the distance between the axis passing through the axis of the shaft axis and the hit point of the head face on the front view directly facing the golfer is y, and the hit point is before the axis. Is negative, and when the hit point is after the axis is positive, the club having a loft angle of less than 18 ° during the set is y> −3 mm, and the value of the distance y between the counts adjacent to each club in the set. Within 5mm or less, as the club number increases monotonously increase or decrease, the occurrence of slice balls is suppressed in clubs with a loft angle of less than 18 ゜, and accurate Shot is possible.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a preferred embodiment of the present invention,
2 to 5 are views for explaining how to determine the hitting point H, FIG. 6 is a plan view for explaining the operation of hitting a ball with the club of FIG. 1, and FIG. 7 is a value of y of each club. , FIG. 8 is a graph showing the distribution of y value of each club in the conventional example, FIG. 9 is an explanatory diagram showing the slice rotation acting on the ball, and FIG. 10 is a diagram showing the hook rotation acting on the ball. FIGS. 11 (a) and (b) to FIGS. 15 (a) and (b) show the front and right sides of a state in which clubs having heads of various shapes are set in a state where the value of y is measured, respectively. FIG. 1 ... shaft axis, 2 ... head, X ... axis, X '... line passing through the hit point H, H ... hitting point, y ... distance between lines X and X.

Claims (1)

(57) [Claims] A distance between an axis passing through an axis of a shaft and an impact point of a head face in a front view directly facing a golfer is defined as y. When the impact point is before the axis, the distance is negative. When the position after the axis is defined as positive, the club having a loft angle of less than 18 ° during the set is set to y> −3 mm, and the value of the distance y between adjacent counts of each club in the set is set to 5 mm or less. A golf club set wherein the number of the club increases or decreases monotonously as the club number increases.