JPH0966126A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head having an enhanced inertia moment, and an enhanced hitting feeling. SOLUTION: A golf club head 3 has, at its front surface, an impact surface 3, a thick peripheral rib 5 which circumscribes the outer periphery of a back face 4 at the rear surface of the golf club head 3 and a recess 6 surrounded with the rib 5, and which in a recess 6C in the rear surface of a sweet area in the impact surface 3, the recess 6 is sectioned into three parts 6A to 6C by two intermediate ribs 9 which are laid on opposite sides of the sweet area and are continued to the peripheral rib 5, bridging between the top 7 side and the sole 8 side. A filler member 11 made of a material having a specific gravity which is at least less than that of the materials of which the peripheral rib 5 and the intermediate ribs 9.

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 so-called cavity back type iron-based golf club head.

[0002]

2. Description of the Related Art As a conventional so-called cavity back type golf club, as shown in FIG. 4, there is a hosel 2 to which a shaft 1 is mounted. The hosel 2 has an impact surface 3, a back face 4, and a back face. 4 is integrally formed with a head main body 10 having a recess 6 surrounded by a thick peripheral rib 5 and a peripheral rib 5 that surrounds the outer periphery of 4. The impact surface 3 is made thin and the peripheral ribs 5 are made thick so that the sweet area is expanded by peripheral weight distribution and the moment of inertia is increased.

[0003]

In the conventional iron club, the thickness of the peripheral ribs 5 on the heel side and the toe side is increased, that is, the weight that should be in the region of the depression 6 is applied to the heel side and the toe side. The distribution reduces the tendency of the head to rotate when the golf ball is impacted by being laterally offset. Further, by increasing the thickness of the peripheral rib 5 on the sole side, the center of gravity can be lowered and the ball can be raised higher. Since the weight of the head body 10 is naturally limited and cannot be unnecessarily heavy, when the peripheral ribs 5 are made thick, the impact surface 3
It was necessary to make the wall thickness of the product as thin as possible. Therefore, it was not possible to obtain a good feel when hitting the ball in the sweet area of the impact surface 3.

A golf club having a traditional shape in which the back face 4 does not have the depression 6 can provide a solid feel, but reduces the rotation of the head when the ball is impacted by removing the sweet area. It was difficult to secure directionality and flight distance.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a golf club head which has an advantage of a cavity back type, an increased moment of inertia, an expanded sweet area, and an improved feel.

[0006]

In order to achieve the above-mentioned object, the present invention has a front wall having an impact surface and a rear surface surrounded by a thick peripheral rib framing the outer periphery of a back face and the peripheral rib. In a golf club head having a dented recess, two intermediate ribs located on both sides of the sweet area on the back side of the sweet area on the impact surface and connected to peripheral ribs from the top side to the sole side are provided to form the dent. It is divided into three, and a filling member made of a material having a smaller specific gravity than at least the peripheral ribs and the intermediate ribs is embedded in the recess sandwiched by the two intermediate ribs.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, a hosel 2 to which a shaft 1 is attached is provided as in the conventional case, and the hosel 2 is formed integrally with a head main body 10. The head main body 10 has a recess 6 surrounded by a thick peripheral rib 5 and a peripheral rib 5 that border the outer periphery of the impact surface 3, the back face 4, and the back face 4. In the recess 6 on the back side of the sweet area of the impact surface 3, two intermediate ribs 9 located on both sides of this sweet area and connected to the peripheral ribs 5 on the sole 7 side from the top 7 side are provided to divide the recess 6 into three. I am doing it. The depression on the heel side of the intermediate rib 9 is indicated by reference numeral 6A, and the depression on the toe side is indicated by reference numeral 6B.
A recess 6C sandwiched between the two intermediate ribs 9 (see FIG. 2)
A filling member 11 made of a material having a specific gravity smaller than that of at least the peripheral ribs 5 and the intermediate ribs 9 was embedded therein. FIG. 2 shows FIG.
3A is an end view taken along line AA of FIG. 6B, showing a state in which the filling member 11 is embedded in the depression 6C. As the filling member 11, a material such as titanium or an alloy thereof, aluminum or an alloy thereof, magnesium or an alloy thereof can be preferably used. In addition, as a material forming the head body 10 other than the filling member 11, soft iron, stainless steel, copper or an alloy thereof,
Titanium or its alloy can be preferably used. In the embodiment shown in FIGS. 1 and 2, the material forming the head body 10 other than the filling member 11 is the same material, but the impact surface 3 may be formed of another material. For example, the impact surface 3 may be made of titanium or its alloy, the filling member 11 may be made of aluminum alloy, and stainless steel may be used as the other material for forming the head body 10.

FIG. 3 shows an end view taken along the line BB of FIG. 1, in which the filling member 11 is embedded in the back area overlapping the area of the impact surface 3 covering the sweet area. The filling member 11 is made of, for example, a forged titanium alloy having a predetermined size and thickness, and is surrounded by the peripheral rib 5 on the top 7 side, the peripheral rib 5 on the sole 8 side, and two intermediate ribs 9. It can be fitted in the recess 6C. Alternatively, when a material having a relatively low melting point such as aluminum or its alloy is used, the filling member 11 can be cast into the recess 6C.

The two intermediate ribs 9 are integrally formed of the same material as the peripheral ribs 5, and when the thickness of the impact surface 3 is extremely thin, the intermediate ribs 9 reinforce the impact surface 3 in terms of strength. A recess 6C in which the filling member 11 is embedded
Is 1/2 to 1/3 of the total volume of the depressions 6A, 6B, 6C
Preferably occupy This ratio also depends on the specific gravity of the material used. Head body 1 other than the filling member 11
When 0 is formed of the same material, the specific gravity of this constituent material is preferably 7.0 to 9.0, and the specific gravity of the filling material 11 is 1.
Those of 0 to 7.0 are preferable.

[0011]

As described above, according to the present invention, the two ribs located on both sides of the sweet area in the recess of the back surface of the sweet area on the impact surface and connected from the top side to the peripheral ribs on the sole side are provided. Since the intermediate rib is provided to divide the depression into three, and the filling member made of a material having a smaller specific gravity than at least the peripheral rib and the intermediate rib is embedded in the depression sandwiched by the two intermediate ribs, the effect of providing the depression That is, it is possible to improve the feel at impact while maintaining the effect of increasing the moment of inertia and expanding the sweet area. Even if the impact surface is extremely thin, the impact surface can be reinforced by the presence of the two intermediate ribs.

[Brief description of drawings]

FIG. 1 is a view from the back side showing a preferred embodiment of the present invention.

FIG. 2 is an end view taken along line AA of FIG. 1;

3 is an end view taken along line BB of FIG.

FIG. 4 is a view showing a conventional example seen from the back side.

[Explanation of symbols]

 3 Impact surface 4 Back face 5 Peripheral rib 6 Dimples 6A to 6C Dimple 7 Top 8 Sole 9 Intermediate rib 10 Head body

Claims (2)

[Claims] 1. A golf club head having a front surface having an impact surface and a rear surface having a thick peripheral rib that surrounds the outer periphery of the back face and a recess surrounded by the peripheral rib. Two intermediate ribs located on both sides of this sweet area and connected to the peripheral ribs on the sole side from the top side inside the depression on the back side are divided into three, and the depression is sandwiched between these two intermediate ribs. A golf club head, wherein a filling member made of a material having a specific gravity smaller than that of at least the peripheral ribs and the intermediate rib is embedded. 2. The filling member is selected from titanium or an alloy thereof, aluminum or an alloy thereof, magnesium or an alloy thereof, and the other head components are made of soft iron, stainless steel, copper or an alloy thereof, titanium or an alloy thereof, or The golf club head according to claim 1, wherein two golf clubs are selected.