JPH0938251A - Golf club head - Google Patents

Abstract

(57) [Abstract] [Problem] To prevent the ball from blowing up under the conditions of fine weather, and to use the golf club with total peace of mind without reducing the flight distance even under the conditions of rain or on mistakes. An object of the present invention is to provide a golf club head capable of extending a flight distance. SOLUTION: In the first embodiment of the present invention shown in FIG. 1, the markings 3 are formed such that the spacing h between the markings 3 is gradually increased from the lower portion 2a of the face surface 2 toward the upper portion 2b. is there. Further, in the second embodiment of the present invention shown in FIG. 2, the groove width S of the marking 3 is formed so as to become gradually narrower from the lower portion 2a to the upper portion 2b of the face surface 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head, and more particularly to an arrangement structure of markings having a concave cross section formed on a face surface of a wood golf club head.

[0002]

2. Description of the Related Art Generally, a score line (a linear groove) and a dimple (a spherical depression) are formed on a face surface of an iron golf club head or a wood golf club head.
Concave markings made of are formed in parallel with the installation surface at predetermined intervals. The purpose of such marking is mainly to obtain the spin rate (friction coefficient) with the golf ball and to efficiently remove drainage and mud and dust from the face surface in rainy weather. Except for this, it is generally formed on the face surface of an iron golf club head or a wood golf club head.

By the way, the face surface of the conventional wood golf club head is formed with a constant curvature with the center of the face surface as a fulcrum, and the marking pattern (face pattern) formed on the face surface having this curvature is The club heads are arranged substantially parallel to the installation surface of the club head body, vertically symmetrical with respect to the horizontal direction of the face center, and regularly arranged.

[0004]

However, with a club head having such a conventional face pattern, when the golf ball is hit from above the center near the center of gravity of the head to near the upper part, the face surface uses the center of the face surface as a fulcrum. Since it is formed with a constant curvature, in addition to a high launch angle, the amount of spin is too high, and as a result, the ball is blown up and it is difficult to fly the ball far.

Further, in order to solve the above problems, a slick face without marking on the face surface is conceivable. However, when such a golf club was manufactured and tried, it hits above the face surface in fine weather. At this time, the above-mentioned problem that the ball blows up can be solved, but when hitting below the face surface in rainy weather, it becomes a drop ball and the flight distance does not come out, and there is a problem that it is difficult to link it to practicality.

Further, conventional wood golf club heads are disclosed, for example, in Japanese Patent Laid-Open Nos. 5-237206 and 5-1987.
As disclosed in Japanese Unexamined Patent Publication No. 2-144674, even if the ball is hit at a position outside the sweet spot on the face surface, a trajectory with good directionality can be obtained, and the face surface is also aimed at extending the flight distance. In which the friction coefficient is changed by shot blasting the central region and the outer region thereof, and as an iron golf club head,
As disclosed in Japanese Patent Laid-Open No. 59-164076, by eliminating the face line at least near the center of the face surface, the golf ball is less likely to be scratched, and the back spin amount of the golf ball is almost eliminated. There are also proposals that do not reduce the usability of conventional products without reducing it.

The present invention has been made in view of the above conventional problems, and the gap between markings formed on the face surface of the club head or the groove width of the marking is continuous from the lower portion to the upper portion of the face surface. The structure of the golf club prevents the ball from blowing up under the conditions of fine weather, and the golf club can be used with total peace of mind without reducing the flight distance even under the conditions of rain or on mistakes. It is an object of the present invention to provide a golf club head capable of extending the flight distance.

[0008]

To achieve the above object, the present invention comprises concave markings formed on a face surface of a club head at a predetermined interval substantially parallel to the installation surface of the club head. It is a gist of a golf club head, in particular, that a space between markings formed on a face surface of a wood golf club head is gradually widened from a lower portion to an upper portion of the face surface.

The present invention also provides a golf club head in which concave markings are formed on the face surface of the club head substantially in parallel with the installation surface of the club head at a predetermined interval, and particularly, a wood golf club head. The gist of the present invention is that the groove width of the marking formed on the face surface is gradually narrowed from the lower part to the upper part of the face surface.

The present invention is configured as described above, and is configured such that the spacing of markings formed on the face surface of the club head or the groove width of the markings continuously changes from the lower part to the upper part of the face surface. It is possible to suppress sudden changes in flight distance due to changes in the hit position of the ball, eliminating the blow-up ball when hitting the golf ball from the center of the face surface to near the upper part, and also in rain conditions and mistakes. You can also increase the total flight distance. The marking as described above is not limited to wood golf club heads, but can be applied to iron golf club heads.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of a face surface of a club head of a wood golf club embodying the present invention. The face surface 2 of the club head 1 has a plurality of score lines substantially parallel to the installation surface of the club head 1. Three
A concave marking 3 made of a is formed.

In the first embodiment of the present invention shown in FIG. 1, the markings 3 have a spacing h between the markings 3,
The face surface 2 is formed so as to be gradually wider from the lower portion 2a to the upper portion 2b. Further, in the second embodiment of the present invention shown in FIG. 2, the groove width S of the marking 3 is formed so as to become gradually narrower from the lower portion 2a to the upper portion 2b of the face surface 2.

In the above embodiment of the present invention, the spacing h of the markings 3 formed on the face surface 2 of the club head 1 or the groove width S of the markings 3 is set to the lower portion 2 of the face surface 2.
By being configured to continuously change from a to the upper portion 2b, it is possible to suppress a rapid change in the flight distance due to a change in the hit position of the ball, and the golf ball can be played near the center of the face surface 2 and above. The ball blown up when hit is eliminated, and the total flight distance can be extended even in the case of rain conditions and mistakes.

Next, the club head 1 according to the present invention.
FIG. 3 shows a conventional club head 1a in which the marking 3 shown in FIG. 4 is a vertically symmetrical face pattern, and a club head 1b in which the marking 3 is not formed on the face surface 2 shown in FIG. The results of testing the difference in flight distance when hitting the ball at the hit points 1 to 7 will be described. [Test Conditions] Golf club: No. 1 (# 1) metal wood having a shaft length of 44 inches and a loft angle of 11 ° was used.

Head speed: 40 m / sec Golf ball: Two-piece ball is used. The hitting point shown in FIG. 3 is 5 above and below the face center.
A total of 7 dots was tested in mm steps. FIG. 6 shows a case where the relationship between the hitting point position and the flight distance in the case of rain (WET) is performed using the above three types of golf clubs.
Club head 1 with slick face pattern shown in broken line
For b, the flight distance does not appear at all at the hitting point position 1, but the flight distance tends to rapidly increase from the hitting point position 4.

Further, in the conventional club head 1a having the vertically symmetrical face pattern, the flight distance can be extended to some extent from the hitting position 1 to the hitting position 4, while the flight distance is considerably increased from the hitting position 4 to the hitting position 7. I can't stretch. On the other hand, in the case of the club head 1 according to the present invention, it is possible to extend the flight distance to some extent from the hitting position 1 to the hitting position 4 and also to extend the hitting distance from the hitting position 4 to the hitting position 7. It is possible, and there is no sudden change in flight distance even at the face center,
It is possible to extend the total flight distance even under rainy conditions and mistakes. It is possible to suppress changes in the hit position of the ball, eliminate the blow-up ball when hitting the golf ball from the center of the face surface to near the upper part, and to totally fly against rain conditions and mistakes. You can increase the distance.

FIG. 7 shows the relationship between the hitting position and the flight distance in fine weather (DRY) using the above three types of golf clubs. Although not so much, the club head 1b having the slick face pattern shown by the broken line has no flight distance at the striking position 1, but the club head 1 according to the present invention and the conventional club head 1a having the vertically symmetrical face pattern.
Then, when the golf ball is hit near the center of the face surface and above, the blown-up ball is eliminated, and the flight distance does not change abruptly, and the total flight distance can be extended.

In the above embodiment, the face surface 2 of the wood golf club head has been described, but the present invention can be applied to the face surface of an iron golf club head.

[0019]

As described above, according to the present invention, the spacing of markings formed on the face surface of the club head or the groove width of the markings is continuously changed from the lower part to the upper part of the face surface. , It is possible to extend the flight distance by using a golf club with total peace of mind by preventing the ball from blowing up under the conditions of fine weather and without reducing the flight distance even under the conditions of rain or on mistakes. In addition, the gap between markings formed on the face surface of the club head or the width of the marking groove is configured to continuously change from the lower part of the face surface to the upper part of the face, so that a sudden jump due to changes in the hit position of the ball can be achieved. This has the effect of suppressing changes in distance.

[Brief description of drawings]

FIG. 1 is a front view of a face surface of a wood golf club head embodying the present invention.

FIG. 2 is a front view of a face surface of a wood golf club head according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram of a hitting position of a club head when a flight distance between the club head according to the present invention and a conventional club head is tested.

FIG. 4 is a front view of a club head in which a conventional marking has a vertically symmetrical face pattern.

FIG. 5 is a front view of a conventional club head having a slick face pattern in which no marking is formed on the face surface.

FIG. 6 is a graph explaining a relationship between a hitting point position and a flight distance in the case of rain (WET) when three types of golf clubs are used.

FIG. 7 is an explanatory graph showing the relationship between the hitting point position and the flight distance in fine weather (DRY) when three types of golf clubs are used.

[Explanation of symbols]

1 club head 2 face surface 3 marking 3a score line h spacing between markings S groove width of marking

Claims (2)

[Claims] 1. A golf club head comprising concave markings formed on a face surface of the club head substantially in parallel with the installation surface of the club head at predetermined intervals, wherein the distance between the markings is equal to that of the face surface. A golf club head, characterized in that it is formed so as to widen in sequence from the lower part to the upper part. 2. A golf club head comprising concave markings formed on the face surface of the club head substantially in parallel with the installation surface of the club head at a predetermined interval, wherein the groove width of the marking is equal to that of the face surface. A golf club head, wherein the golf club head is formed so as to become narrower from the lower part toward the upper part.