JPS61154684A - Golf club - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a golf club that stabilizes the direction of a ball hit.

[Conventional technology]

It is well known that the direction of a ball hit in golf is greatly influenced by the rotation given to the ball.

When the ball is hit, rotation is imparted to the ball by the club face surface G, and the grooves cut into the face surface have a large effect on imparting rotation to the ball.

In conventional golf clubs, as shown in FIG. 5, grooves 2 are cut horizontally on the face surface of the head 1,
As shown in the figure, the objective was to give ball A vertical rotation by scratching ball A at the time of impact using the shoulder portion a%i in the transverse direction of groove 2. These are aimed at causing the ball to rotate in the opposite direction on the green to reduce rolling, or to pull the ball back, or to maintain the straightness of the ball when it flies.However, regarding the drive of the ball, cannot be said to utilize contact resistance, and cannot provide stability in batted ball and direction.

[Problems that pronunciation attempts to solve]

A notable example of unstable hitting direction is when the face is open or closed at the moment of impact.
The horizontal grooves 2 on the left and right sides of the face give ball A horizontal rotation to the right or left, respectively.
A problem arises in that the ball hooks or slices and stable directionality cannot be obtained.

In other words, the contact resistance of groove 2 against the ball (elastic body) number is:
Considering the deformation of the ball at the time of impact, there is a large contact resistance in the longitudinal direction, including the guiding effect of the groove 2 (the effect of advancing objects in the direction in which it is carved), and the contact resistance is large in the vertical direction (see Figure 7). In a golf club that requires a lot of rotation, it is not preferable that the grooves 2 are cut in the horizontal direction.

Therefore, in this invention, we fundamentally reconsidered the effect of the grooves carved on the club face on the ball and considered the drive of the ball to be exerted by contact resistance, thereby reducing unnecessary effects and maximizing the necessary characteristics. The purpose is to provide a golf club that can be used effectively.

[Means for solving problems]

In order to solve the above problems, the present invention provides vertical grooves on the face surface ζ of the head.

[Effect]

One groove is provided on the face of the head in the vertical direction (along this direction), so when the ball is hit, the groove contacts the ball in the vertical direction, and contact resistance is generated along the longitudinal direction. The ball rotates vertically, making the direction of the ball stable.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the golf club of the present invention includes a shaft,
Attach it to the tip of the head 11 and place it on the face of the head 12.
It is constructed by providing a large number of grooves 13 along the vertical direction.

Although the cross-sectional shape of the groove 3 is not shown, it is cut into a V-shaped cross section, and both edges that open at the face surface are formed into arcuate surfaces, so as to prevent the ball A from being damaged by both edges when hitting the ball. At the same time, the contact area with the ball A is increased, so that the ball A can be more reliably rotated in the vertical direction.

In the case of Fig. 1, the grooves 13 provided on the face are arranged perpendicularly in the vertical direction and at regular intervals in the width direction, but as shown in Figs. It is also possible to provide two pairs of balls and give them an oblique rotation to obtain a hook or a null spall, or conversely to correct these balls.

Although not shown, the grooves 13 may be arranged not only at regular intervals but also irregularly, and the cross-sectional shape may be square or semicircular. , a wood such as a driver.

The golf club of the present invention has the above-described structure, and when the ball is hit, the groove 13 contacts the ball A in the vertical direction, and the ball A is rotated in the vertical and vertical directions, so that the direction of the ball is accurately determined. Become.

That is, in the conventional golf club shown in FIGS. 5 and 6, the grooves 2 are provided along the left and right horizontal directions. % i
etc. act to scratch the ball A, and the longitudinal direction of each edge portion acts as a large resistance against the ball.

Therefore, in conventional golf clubs, grooves are cut in the left and right horizontal directions, and the ball is used with a large driving force in the left and right horizontal directions.
Unless the club enters the flight line in a straight line, it is difficult to stably give the ball vertical rotation, and this shows how great the driving force is in the left and right horizontal directions of the ball when hitting the ball.

In contrast, in this invention, the drive ability for the ball in the groove is understood as being exerted by contact resistance, and its characteristics are analyzed, and as a result, the drive ability for the ball is determined by scratching using the shoulder portion in the transverse direction of the groove. We discovered that applying the contact resistance against the elastic body in the longitudinal direction of the groove has a significantly greater effect. It is much smaller, the ball can reliably rotate up and down, and stable directionality can be obtained.

〔effect〕

As described above, according to the present invention, since the grooves are provided in the vertical direction on the face surface of the club head, the contact resistance between the ball and the groove in the vertical direction when hitting the ball increases significantly, and the transverse direction of the grooves is utilized. Compared to the conventional method of driving the ball with
It has an extremely large drive ability, and the ball reliably rotates vertically and flies, providing stable directionality.

[Brief explanation of drawings]

Figure 1 is a front view of the golf club according to the invention, Figure 2 is a front view of the golf club according to the invention.
The figure is an enlarged sectional view showing the relationship between the grooves and the ball as above, Figures 3 and 4 are front views of golf clubs showing different examples of grooves, and Figure 5 is a front view of a conventional golf club. , FIG. 6 is an enlarged sectional view showing the relationship between the groove and the ball, and FIG.
The figure is a front view of the groove. 11...shaft, 12...head, 13...'
ft, h...ball,

Claims (5)

[Claims] (1) A golf club with vertical grooves on the face of the head. (2) The golf club according to claim 1, wherein the grooves are provided at uniform intervals. (3) The golf club according to claim 1, wherein the grooves are provided at non-uniform intervals. (4) The golf club according to claim 1, wherein the groove is provided to be inclined in the vertical direction. (5) The golf club according to any one of claims 1 to 4, wherein the groove is cut to have a V-shaped cross section, and both side edges of the face opening are formed into arcuate surfaces.