JP3412660B2 - Golf club head - Google Patents

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 a structure for arranging markings having a concave cross-section, which are formed on the face surface of the club head body and have score lines and dimples.

[0002]

2. Description of the Related Art Generally, on the face surface of iron golf club heads and wood golf club heads, concave markings composed of score lines (linear grooves) and dimples (spherical grooves) are provided in parallel with the installation surface. Are formed at intervals of. 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 They 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, in a club head body having such a conventional face pattern, when a golf ball is hit from above the center near the center of gravity of the head to above the center, the face surface serves as a fulcrum at the center of the face surface. Since it is formed with a constant curvature as
In addition to the high launch angle, the amount of spin is too high, and as a result, the ball blows 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 a golf club of this kind was manufactured and tried, it hits above the face surface in fine weather. Sometimes, the problem that the ball blows up can be solved, but when it hits below the face surface in the rain,
There was a problem that it was a drop ball and the flight distance did not come out, and it was 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-mentioned conventional problems, and the face pattern of the marking formed on the face surface of the club head main body has an asymmetric structure, so that the ball can be used under the conditions of fine weather. It is possible to provide a golf club head that prevents blown up of the golf club and can extend the flight distance using a golf club with total peace of mind without reducing the flight distance even in the case of rain or conditions. It is intended.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a club head main body having a curvature with a curvature.
The concave marking is made parallel to the installation surface
In the wood golf club head, the marking face pattern is formed in an asymmetric pattern between the upper face surface side and the lower face surface side with the vicinity of the substantially central portion of the face surface as a boundary, and the marking groove is formed on the lower face surface side. The gist is that the intervals of the markings are formed on the upper side of the face surface such that the intervals of the markings gradually increase from the vicinity of the substantially central portion of the face surface toward the upper side while the intervals are made constant and the groove width is constant. It is a thing.

Further, in order to achieve the above object, the present invention provides a club head main body with a curved face surface.
Woodgol with concave markings parallel to the placement surface
In the frub head, the marking face pattern is formed in an asymmetric pattern between the upper face side and the lower face side with the vicinity of the substantially central portion of the face as a boundary, and the groove spacing of the marking is formed on the lower face side. the groove width while constant at an equal pitch, the groove width of the marking the face upper side that <br/> which was formed to have successively narrower toward the upper side from the vicinity of the substantially central portion of the face surface Is the gist.

[0010] The present invention is constructed as described above, the face pattern of the marking, by the asymmetric structure in the vicinity of the substantially central portion of the face surface as the boundary, in the condition in fine weather to prevent racing of the ball, The distance can be extended by using a golf club with total peace of mind without reducing the distance even under rainy conditions or mistakes.

That is, the marking face pattern
From the vicinity of the center of the face surface to the lower side of the face surface is a normal marking face pattern, and from the vicinity of the center of the face surface to the upper side of the face surface, the marking interval is approximately the center portion of the face surface. The face pattern of the marking is formed so as to be variable from the vicinity to the upper side, and the face pattern of the marking is formed from the vicinity of the center of the face surface to the lower side of the face surface. The above effect can be obtained by forming the marking groove width from the central portion to the upper surface side so that the marking groove width is variable.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 illustrates the invention.
2 is a front view of the face surface 1 of the wood golf club head shown in FIG. 1, and the face pattern of the marking 2 formed on the face surface 1 is near the central portion XX of the face surface 1.
The upper side 1b of the face surface 1 and the face surface 2
The lower side 1a is formed in an asymmetric pattern.

That is, as the form of the asymmetric pattern of the face surface 1, as shown in FIG. 1, the face surface 1 is parallel to the installation surface only on the lower side 1a of the face surface 1 from near the center XX of the face surface 1. The concave marking 2 composed of the formed score line 2a and the dimple 2b is formed, and the marking 2 is not formed from the vicinity XX of the substantially central portion of the face surface 1 to the upper side 1b of the face surface 1. It has a smooth surface (slick face pattern).

The concave marking 2 may be composed of only the score line 2a parallel to the installation surface.
FIG. 2 shows the above-mentioned wood golf club head, a conventional wood golf club head having a vertically symmetrical face pattern in which marking 2 is applied to the entire face surface, and a so-called comparative example in which no marking 2 is applied to the face surface at all. It is explanatory drawing which compared the flight distance at the time of fine weather and rain in the case of hitting the center upper side and center lower side of the face surface of the wood golf club head having a slick face pattern. This comparative test was conducted under the following conditions. [Test conditions] (1) Shaft length 44 inches, head loft angle 1
A 1 ° wood golf club was used. (2) Head speed: 40 m / sec (3) Hitting point position: center ± 15 mm In the case of a conventional wood golf club head with a vertically symmetrical face pattern with marking 2 on the entire face surface,
In fine weather, the trajectory hit on the center upper side 1b of the face surface becomes a ball that is blown up due to excessive spin, as shown in the figure, and falls sharply at the ball drop point and the flight distance does not extend. However, when it rains
The ball has the advantage that it rolls after falling and the flight distance is extended. Further, the trajectory hit on the lower center side 1a of the face surface is about the same, the flight distance does not change in fine weather and in rainy weather.

On the other hand, in the case of a slick face pattern wood golf club head in which no marking 2 is applied to the face surface, the trajectory hit on the center upper side 1b of the face surface during fine weather is shown in the figure. As described above, it has the advantage that it does not spin, and that it can extend the flight distance without becoming a ball that blows up, and that the flight distance is even longer in rainy weather.

Further, the trajectory hit on the lower center side 1a of the face surface can obtain a flight distance similar to that of the vertically symmetrical face pattern with the marking 2 above in fine weather. It has the drawback that it falls on the way and becomes a so-called drop ball, which does not provide the flight distance. The numbers in the trajectory that describe the trajectory of the ball are coefficients and are compared based on 1.

The wood golf club head shown in FIG . 1 is advantageous between a wood golf club head having a vertically symmetrical face pattern in which markings 2 are made on the entire face surface in fine weather and in rainy weather, and a wood golf club head having a slick face pattern. Is formed by forming a smooth surface (slick face pattern) on the upper surface 1b of the face surface 1 from the vicinity of the center XX of the face surface 1 without forming the marking 2. Whether the weather is fine or rainy, the flight distance can be extended in a trajectory hit on the center upper side 1b of the face surface, and from the vicinity XX of the substantially central portion of the face surface 1 to the lower side 1 of the face surface 1.
By forming a concave marking 2 consisting of a score line 2a and a dimple 2b in parallel with the installation surface, a trajectory hit by the center lower side 1a of the face surface does not become a drop ball, It is possible to extend the distance.

Next, in FIG. 3, the face pattern of the marking 2 formed on the face surface 1 is separated from the upper surface 1b of the face surface 1 and the face surface 1 with the vicinity of the substantially central portion XX of the face surface 1 as a boundary. and an asymmetric pattern in the lower side 1a of the
In this embodiment, the face pattern of the marking 2 is the face pattern of the normal marking 2 from the substantially central portion XX of the face surface 1 to the lower side 1a of the face surface 1. Face face 1
Near the center of XX to the upper side 1b of the face surface 1
The distance H between the plurality of markings 2 towards the top from the center of the face surface 1 are formed sequentially wide Kunar so.

Further, in FIG. 4, the face pattern of the marking 2 formed on the face surface 1 is divided into the upper side 1b of the face surface 1 and the face surface 1 with the boundary XX near the substantially central portion of the face surface 1 as a boundary. and an asymmetric pattern in a lower side 1a
In another embodiment of the present invention, the face pattern of the marking 2 is the same as the normal marking 2 from the vicinity XX of the substantially central portion of the face surface 1 to the lower side of the face surface 1. The face pattern is similar to that of the face surface 1 from the vicinity of the center XX to the upper side 1
b is formed such that the groove width S of the marking 2 is gradually narrowed from the center of the face surface 1 to the upper portion thereof, that is, is made variable, so that the wood golf club head of FIG.
It is intended that it is possible to obtain the same effect as de.

The marking face pattern in the conventional wood golf club head has, for example, a groove width of 0.
The groove width is 5 to 0.8 mm, the number of grooves is 5 to 8, the groove intervals are equal pitches, and the groove width is constant. And face 1
The groove occupancy rate for marking is 11% to 15%. On the other hand, the groove occupancy rate in each of the above embodiments is 11% to 15% on the lower side 1a of the face surface 1 with the vicinity of the substantially central portion XX of the face surface 1 as a boundary. The upper side 1b is 0% to 10%.

As described above, with respect to the face pattern of the marking in the conventional wood golf club head,
In each of the embodiments of the present invention, by making the face pattern asymmetrical structure, it is possible to prevent the ball from being blown up under the conditions of fine weather, and to reduce the total flight distance even under the conditions of rainy weather and miss shots. With a sense of security, you can use a golf club to extend the flight distance.
It

[0022]

The present invention reduces the curvature of the club head body.
Concave marking parallel to the installation surface on the held face surface
In the wood golf club head obtained by applying the above, the marking face pattern is formed in an asymmetric pattern between the upper face side and the lower face side with the vicinity of the approximate center of the face as a boundary. On the lower side, the marking groove spacing is set to a constant pitch to keep the groove width constant, while on the upper side of the face, the marking spacing or groove width is variable , which prevents the ball from blowing up under fine weather conditions. There is an effect that the flight distance can be extended by using the golf club with total peace of mind without reducing the flight distance even in the event of rain or a miss shot.

[Brief description of drawings]

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

FIG. 2 is a so-called comparative example in which the wood golf club head of FIG . 1 , a conventional wood golf club head having a vertically symmetrical face pattern in which the entire face surface is marked, and the face surface is not marked at all. It is explanatory drawing which compared the flight distance at the time of fine weather and rain in the case of hitting the center upper side and center lower side of the face surface of the wood golf club head having a slick face pattern.

FIG. 3 is a front view of a face surface of a wood golf club head showing an embodiment of the present invention.

FIG. 4 is a front view of a face surface of a wood golf club head showing another embodiment of the present invention.

[Explanation of symbols]

1 Face 2 Marking 2a Score line 2b Dimple XX Near the center of the face

Continuation of the front page (56) Reference JP 59-164076 (JP, A) JP 7-163688 (JP, A) JP 7-204298 (JP, A) JP 5-200132 (JP , A) JP-A-2-228981 (JP, A) Actual opening Sho 60-25654 (JP, U) Actual opening Sho 51-29666 (JP, U) Actual opening Sho 62-97665 (JP, U) Actual opening Sho 61-200076 (JP, U) Actually developed 60-6561 (JP, U) Patent 3170675 (JP, B2) Design registration 734949 (JP, S) Similar to design registration 734949 1 (JP, S) Similar to design registration 892399 1 (JP, S) (58) Fields investigated (Int.Cl. ⁷ , DB name) A63B 53/00-53/04

Claims (2)

(57) [Claims] Claims: 1. A wood golf club head comprising a club head main body having a curved face surface with concave markings parallel to the installation surface. The upper surface of the face surface and the lower surface of the face surface are formed in an asymmetrical pattern with the vicinity of the substantially central portion as a boundary. On the lower surface of the face surface, the groove intervals of the markings are made constant at equal pitches while the groove width is fixed. golf club head face surface upper side spacing of said marking is characterized in that it is formed so as to be successively wider toward the upper side from the vicinity of the substantially central portion of the face surface. 2. A wood golf club head in which a concave face marking is provided on a face surface having a curvature of a club head main body in parallel with an installation surface, wherein the face pattern of the marking is The upper surface of the face surface and the lower surface of the face surface are formed in an asymmetrical pattern with the vicinity of the substantially central portion as a boundary. On the lower surface of the face surface, the groove intervals of the markings are made constant at equal pitches while the groove width is fixed. golf club head face surface upper side groove width of the marking, characterized in that was formed to have successively narrower toward the upper side from the vicinity of the substantially central portion of the face surface.