JP3035480U - Golf club head - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To increase the flight distance of a ball by bending a hit portion. A metal golf club head having a relatively thin ball striking portion 7 and a thick rib 9 having a sole 11 having a lower surface projecting in the rear direction at a lower end portion of the ball striking portion 7,
The rib 9 is configured to have a slit 12 that is adjacent to the extension line of the back surface of the hitting portion 7 and that extends substantially parallel to the extension line through the rib 9.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a metal golf club head having a relatively thin ball striking portion and a thick rib having a lower surface protruding toward the rear surface as a sole at a lower end portion of the ball striking portion.

[0002]

[Prior art]

 The metal iron golf club head has a shape in the thickness direction between the ball striking face and the back surface, and the thickness gradually increases from the upper end or top of the head toward the sole, while the length direction from the toe to the heel is almost uniform. A plain back type with a similar thickness, the ball hitting part of the head was made relatively thin, and the excess weight due to that was concentrated around the back surface of the ball hitting part, especially the sole, to form a cavity on the back surface of the head. The cavity back type and, on the contrary, the muscle back type in which the thickness of the hitting portion in the area corresponding to the cavity is made thicker than the thickness of the peripheral portion are known.

Since the thickness of the hitting portion of the head is thick not only in the muscle back but also in the plain back, the rigidity of that portion is high and the hitting portion is not deformed at the time of hitting the ball. Even though it is thin, it does not deform even when shocked. A sufficient thickness was given to the hitting portion in consideration of the wideness of the cavities.

[0004]

[Problems to be solved by the device]

 However, according to various studies by the inventor, it has been found that the ball hitting portion of the head has a higher initial velocity and a longer flight distance when the ball is bent or deformed to some extent during hitting. In this respect, since the hitting portion of the conventional golf club head does not bend and does not deform, there is a limit to the flight distance with the same loft and the same club length.

Therefore, an object of the present invention is to provide a golf club head excellent in the flight distance of a ball.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a metal golf club head having a relatively thin ball striking portion and a thick rib whose sole face is a lower surface protruding toward the back side at the lower end portion of the ball striking portion. The rib is provided with a slit which is close to the extension line of the back surface of the hitting portion and is substantially parallel to the extension line and extends through the rib.

[0007]

[Embodiment of the invention]

 A preferred embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, a metal head body 1 is integrally formed with a hosel 2 that is connected to a shaft (not shown), and a left and right toe 3 and a heel 4, upper and lower top edges 5 and leading edges 6 are formed. It has a hit ball portion 7 that is surrounded and hits the ball, and a back face 8 on the back side of the hit ball portion 7 has a cavity 10 surrounded by ribs 9. The sole 11 exists from the leading edge 6 to the back face 8 side, and the rib 9 of this sole 11 is formed to be thicker than the other ribs 9 (toe 3 and heel 4 side and top edge 5 side). Has been done.

The thickness t _F of the portion where the cavity 10 exists on the back side of the hitting portion 7 is formed to be relatively thin, preferably about 1.0 to 2.2 mm. The thickness t _S of the rib 9 on the side of the sole 11 is as thick as about 10 to 20 mm, and the height h of the rib 9 near the back face 8 at which a slit 12 described below is provided is 5 to 5 mm. The weight is about 25 mm, and the weight of the head body 1 is concentrated on the sole 11 side to achieve a low center of gravity.

A slit 12 extending through the rib 9 of the sole 11 is formed in the rib 9 of the sole 11 close to the extension line of the back surface of the hitting portion 7 and substantially in parallel with the extension line. That is, the side wall of the slit 12 on the ball striking portion 7 side is on the extension line of the back surface of the ball striking portion 7, and the slit 12 extends through the height h of the rib 9. The width d of the slit 12, that is, the distance between the back side of the hitting portion 7 and the inside of the rib 9 is about 0.5 to 1.0 mm, and the length m is the direction of the slit 12 from the toe 3 to the heel 4. The length is about 30 to 50 mm. The midpoint of the length m of the slit 12 preferably intersects with a perpendicular line passing through the center of the hitting portion 7. With respect to the width d and the length m of the slit 12, the weight distributed to the ribs 9 of the sole 11 serves to lower the center of gravity of the head, so that the lower center of gravity is not adversely affected and the hitting portion 7 ( It should be within the range where the required bending or elasticity can be obtained in the central area).

A length n in FIG. 2 indicates a range of a score line (indicated by reference numeral 13 in FIG. 3) horizontally engraved on the hitting portion 7 in a direction from the toe 3 to the heel 4, and a length m of the slit 12 is shown. Is shorter than the length n.

The metal material forming the head body 1 may be a high specific gravity material such as iron having a specific gravity of 7.6, copper or an alloy thereof having a specific gravity of 8.9, and stainless steel having a specific gravity of 7.8, but a specific gravity of 4.5. 2. Titanium or its alloy, specific gravity 2.7 aluminum or its alloy, specific gravity 2. A low specific gravity material such as a magnesium alloy of 0 may be used. Alternatively, as shown in FIG. 3, only the hitting portion 7 may be made of a low specific gravity material, the other portion may be formed of a high specific gravity material, and the hitting portion 7 may be fitted and fixed to the other portion. In the embodiment shown in FIG. 3, for example, the hitting portion 7 can be formed of titanium or its alloy, and the other portions can be formed of beryllium copper.

[0013]

[Effect of the invention]

 As described above, according to the present invention, there is provided a metal golf club head having a relatively thin-walled hitting portion and a thick rib having a lower surface protruding toward the rear surface as a sole at the lower end portion of the hitting portion. Since the rib has a slit which is close to the extension line on the back surface of the hitting portion and extends substantially parallel to the extension line through the rib, the hitting portion bends when hitting the ball at the hitting portion, Elastic force can be generated to increase the flight distance of the ball. Also, the presence of thick ribs with the bottom surface as a sole makes it possible to lower the center of gravity, and by forming slits with a width of 0.2 to 1.0 mm and a length of 30 to 50 mm in the ribs of this sole, It becomes easy to bend.

[Brief description of the drawings]

1 is a sectional view taken along the line AA of FIG. 2 showing a preferred embodiment of the present invention.

FIG. 2 is a front view of the embodiment of FIG.

FIG. 3 is a perspective view in which the toe side is cut, showing another embodiment.

[Explanation of symbols]

 1 Head Body 3 Toe 4 Heel 5 Top Edge 6 Leading Edge 7 Hitting Area 9 Rib 11 Sole 12 Slit

Claims (6)

[Utility model registration claims] 1. A metal golf club head having a relatively thin ball striking portion and a thick rib having a lower surface projecting in the back direction at the lower end portion of the ball striking the sole as a sole. A golf club head, characterized in that it has a slit that extends through the rib in a direction substantially parallel to the extension line on the back surface and substantially parallel to the extension line. 2. The golf club head according to claim 1, wherein the slit has a width of 0.2 to 1.0 mm. 3. The golf club head according to claim 1 or 2, wherein the slit is provided at a substantially central portion of a section extending to the toe and the heel over a length of 30 to 50 mm. 4. The hit ball member is made of a metal having a specific gravity smaller than that of the remaining club head constituent members.
The golf club head according to claim 1. 5. The golf club head according to claim 1, wherein a cavity is formed on the back surface of the hitting portion by edging a thick rib whose periphery is continuous with the rib of the sole. 6. The golf club head according to claim 1, wherein the hitting portion has a thickness of 1.0 to 2.2 mm.