JPH07313639A - Head of golf club - Google Patents

Abstract

PURPOSE:To provide a golf club with which an improved flying distance and stability can be obtained by constructing radial ditches on the face of a golf club head to eliminate the hydroplaning phenomenon. CONSTITUTION:A large number of face ditches 3 is radially formed on a face 2 of this iron club head 1. The face ditches 3 are formed as the center or the base part of the radial tending toward almost the central part of the sole 4 side, and the width and the depth of each ditch are formed narrower and deeper as approaching the center or the base part of the radial and wider and shollower to the end. By forming the face ditches like this, when a ball on turf or rough in the rain is hit water attaching on the face 2 or the ball is splashed away to the direction of each radial ditch by a collision between the face 2 and the ball and the hydroplaning phenomenon is eliminated.

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 having a radial face groove on the face surface.

[0002]

2. Description of the Related Art In general, a face groove of a head of a golf club is provided with a large number of grooves at substantially equal intervals along the sole surface. In addition, as a special example, for example, a structure in which the face groove is partially inclined is disclosed in Japanese Utility Model Laid-Open No. 60-610.
It is disclosed in Japanese Patent Laid-Open No. 62-62 and is well known as a conventional example.

In this conventional example, the direction of slicing or hooking, which has been promoted by a general face groove, can be corrected, and its specific structure is from the sole side to the top side of the head main body. A straight and horizontal face line (face groove) is formed in a triangular area at a predetermined pitch in the vertical direction, and a slanting face groove is formed in the toe and heel side areas corresponding to both hypotenuses except the triangular area. Are formed at a predetermined pitch.

The effect of the face groove in the golf club is to increase mechanical friction in contact with the ball to facilitate spin, to prevent hydroplaning due to a water film in rainy weather, and to roughen the ball. It is recognized that when hitting a ball, the grass and the face surface are easily cut to reduce resistance.

[0005]

In the above-mentioned conventional example, when the point hitting the ball deviates from the triangular region, the gear effect is improved in the deviated region, and the ball is rotated left or right. In addition, an inclined face groove is formed so as not to bend in the slice or hook direction.

However, in the above-mentioned conventional example and general golf club, the measures for preventing hydroplaning by the water film in rainy weather have not been sufficiently taken. That is,
When hitting a ball with the head of a club in rainy weather, it is physically natural that the water dispersion state on the face surface of the head becomes radial around the hit point of the ball.

However, the face grooves in the conventional and general golf clubs are formed to be slanted or parallel to each other, and particularly in rainy weather, the sole of the club scoops moisture adhering to the grass to hit the ball. Therefore, the water flows in the horizontal direction or the inclined direction along the face groove, and the water dispersion does not become a radial state in a natural state around the hit point.

As described above, the fact that the water dispersion does not radiate in a natural state means that the horizontal or inclined face groove on the face surface hinders the natural dispersion of water, but at the moment of a hit. It breaks that hindrance and becomes radial beyond the groove due to the habit of water. At this time, a water film is formed on the plane between the grooves, and the water film easily causes hydroplaning, which makes it difficult for spin to take place, and the flight distance is not stable, resulting in a miss shot substantially.

Therefore, the conventional examples and general golf clubs have a problem that must be solved to prevent hydroplaning.

[0010]

As a concrete means for solving the above-mentioned problems, the present invention provides a head of a golf club characterized in that a radial face groove is provided on the face surface. The radial center portion of the groove is formed by setting it in the approximate center portion near the sole, the sweet spot area, the heel side or the toe side, and the radial face groove is tapered in the depth direction and the width direction. It also includes a configuration in which a slightly shorter auxiliary groove is formed between the radial face grooves.

[0011]

By forming the radial face grooves on the face surface, for example, when playing in rainy weather, when the face surface and the ball collide with each other, moisture existing between the face surface and the ball becomes physically radial. It promotes the scattering, prevents the formation of a water film between the face surface and the ball, prevents the hydroplaning phenomenon from occurring, and stabilizes the flight distance and the directionality.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in more detail based on the illustrated embodiments. In the first embodiment shown in FIGS. 1 to 3, 1 is, for example, an iron club head, and the face surface of the head 1 is A large number of face grooves 3 are radially formed on the surface 2.

The radially formed face grooves 3 are
The radial center or the base portion side is formed to face the substantially central portion on the sole 4 side, and the width and depth of each face groove are formed so that the radial center side or the base portion side is narrow and deep and goes to the end side. The width is gradually widened and becomes shallower (see FIGS. 2 and 3).

That is, the width and depth of the face groove 3 are tapered. For example, the face groove 3 is formed to have a width of about 0.7 mm in a narrow portion, a width of about 1.2 mm in a wide portion, and the face groove 3 has a depth of about 0.9 mm and a depth of about 0.2 mm.
So that the width and depth of each groove are tapered. Further, since the face grooves 3 are formed in a radial pattern, they are formed to be approximately 2.1 mm in a narrow space.

Furthermore, the blast line 5 which is substantially parallel to the sole 4 is provided on the face surface 2 in consideration of the psychological aspect of the user.
By overwriting, even if a radial face groove is formed, a feeling of great discomfort does not occur. In this case, the blast line 5 may be formed by subjecting the face surface 2 to a linear satin finish, or may be drawn by filling with a dissimilar metal.

In the second embodiment shown in FIG. 4, the auxiliary groove 3a is formed between the face grooves 3 formed radially. The auxiliary groove 3a is formed shorter than the face groove 3 so that the lower end of the auxiliary groove 3a does not reach the sole 4. In this embodiment as well, the blast line similar to that in the first embodiment may be formed on the face surface 2.

In the club heads of the first and second embodiments, since the face groove 3 is formed radially around the substantially central portion near the sole 4, the ball on the grass or in the rough in rainy weather. When hitting, the water adhering to the face surface 2 and the ball surface is scattered in the radial direction by the collision between the face surface 2 and the ball, but the scattered water is impossible due to the radial face groove 3. By being guided without a water film, a water film is hardly formed between the face surface 2 and the ball, and the hydroplaning phenomenon does not occur.

Further, since the face groove 3 is also formed with a taper in the depth and width directions, the water scooped on the sole 4 side at the time of hitting the ball is rapidly scattered in the radial direction by the face groove 3. As a result, water escapes from the face surface 2 in cooperation with the water that hits the ball and splashes radially, and the formation of a water film on the face surface is prevented. It suppresses the generation of the hydroplaning phenomenon.

Particularly, the formation of the auxiliary groove 3a in the second embodiment acts to further establish the escape of water when the ball is hit in the vicinity of the sweet spot, so that the formation of the water film on the face surface 2 is further increased. It is suppressed and the hydroplaning phenomenon is less likely to occur.

In the third embodiment shown in FIG. 5, the radial face groove 3 is formed by setting the center portion in the vicinity of the sweet spot area 6 on the face surface 2. Of course, also in this embodiment, it is optional to provide the auxiliary groove between the face grooves 3 and to form the blast line.

In the club head of the third embodiment, when the ball is hit in the vicinity of the sweet spot, the radial face grooves 3 allow the water splashing radially to escape quickly, so that the space between the ball and the face surface can be quickly released. In the above, the water film is almost completely eliminated, and the hydroplaning phenomenon is less likely to occur.

Further, in the fourth embodiment shown in FIGS. 6 and 7, the central portion of the radial face groove 3 is located substantially at the center of the heel side dividing line 7 or the toe side dividing line 8. It was formed. The fourth embodiment is effective not only in use in rainy weather but also in fine weather.

For example, hitting a slice type ball,
Alternatively, it is convenient when used by a player who hits a hook type ball. That is, when the face grooves 3 are formed radially around the heel side shown in FIG.
When the ball is hit on the toe side, the contact surface between the face surface 2 and the ball becomes wider, and the gear effect causes a counterclockwise spin on the ball, so that the ball hit to the right returns to the center by the spin. The ball muscle becomes stable.

On the contrary, when the ball is hit on the heel side, the face grooves 3 are concentrated, so that the face surface 2
The contact area between the ball and the ball becomes smaller, and even if a gear effect occurs, it is difficult for the ball to spin in the clockwise direction, and the sliced ball does not easily come out.

Further, in the club head having the face grooves 3 formed radially around the toe side as shown in FIG. 7, a phenomenon completely opposite to the above occurs, and it is difficult for hook balls to come out. Therefore, this fourth embodiment is convenient for a player who has a habit of slicing or hooking. In this fourth embodiment as well, it goes without saying that auxiliary grooves can be formed between the face grooves 3 and blast lines can be provided as in the second embodiment.

In each of the above embodiments, the iron club head has been described, but it goes without saying that the present invention can also be applied to a wood grab head.

[0027]

As described above, the golf club head according to the present invention has a structure in which the face surface is provided with radial face grooves, so that the face surface and the ball are When a collision occurs, the water present between the face surface and the ball is physically scattered radially. The radial water is assisted by the radial face groove, and It has an excellent effect that a water film is prevented from being formed between them, a hydroplaning phenomenon does not occur, and flight distance and directionality can be stabilized.

Further, the radial center portion of the face groove is formed so as to be set to the substantially central portion near the sole, the sweet spot area, the heel side or the toe side, so that not only when playing in the rain, For a player who has a remarkable tendency in the ball muscle, it also has an excellent effect that the ball muscle can be relaxed.

Further, the radial face grooves are formed so as to have a taper in the longitudinal direction with respect to depth and width, and a slightly shorter auxiliary groove is formed between the radial face grooves. There is an excellent effect that the suppression of can be further improved.

[Brief description of drawings]

FIG. 1 is a front view showing a head of a golf club according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view taken along the line AA of FIG. 1 in the same embodiment.

FIG. 3 is a partially enlarged cross-sectional view taken along the line BB of FIG. 1 in the embodiment.

FIG. 4 is a front view showing the head of the golf club of the second embodiment according to the present invention.

FIG. 5 is a front view showing the head of the golf club of the third embodiment according to the present invention.

FIG. 6 is a front view showing an example of a head of a golf club according to a fourth embodiment of the present invention.

FIG. 7 is a front view showing another example of the fourth embodiment.

[Explanation of symbols]

 1 head 2 face surface 3 face groove 3a auxiliary groove 4 sole 5 blast line 6 sweet spot area 7 heel side marking line 8 toe side marking line

Claims (6)

[Claims] 1. A head of a golf club, wherein a radial face groove is provided on the face surface. 2. The head of a golf club according to claim 1, wherein the radial center portion of the face groove is formed in a substantially central portion near the sole. 3. The golf club head according to claim 1, wherein the radial center portion of the face groove is set to a sweet spot area. 4. The head of a golf club according to claim 1, wherein the radial center portion of the face groove is formed on the heel side or the toe side. 5. The radial face groove is formed by tapering the depth and width in the longitudinal direction.
The head of the golf club according to 2, 3, or 4. 6. The head of a golf club according to claim 1, wherein a slightly shorter auxiliary groove is formed between the radial face grooves.