JPH0317902Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a golf club head commonly referred to as a wood, driver, etc., and particularly to a golf club head made of aluminum alloy. In recent years, golf balls with high hardness, called two-piece balls, have appeared in which the outer surface of a core ball made of hard rubber with high rebound resilience is covered with a hard layer, and such balls have a good flight distance. It is preferred by golfers from all walks of life because of its low impact, feel at impact, and durability. Additionally, in order to take full advantage of the characteristics of two-piece balls, metal golf club heads are now being used instead of persimmon or carbon resin club heads for hitting the ball. . Conventionally, this type of metal golf club head requires a relatively high hardness to match the hardness of a two-piece ball (110-115), so stainless steel has been used as the molding material. It is common. Stainless steel club heads are preferred by users because they take advantage of the characteristics of a two-piece ball and can hit the ball farther, but on the other hand, stainless steel has a lower specific gravity (7.8).
Because of its large size, its external shape is one or two times smaller than a normal club head made of persimmon or carbon resin. This is a problem for general users who are familiar with the external shape of club heads made of Persimmon or carbon resin, and there is a desire for a metal club head with an external shape comparable to that of Persimmon club heads. Therefore, as a metal club head with an external shape and weight comparable to Persimmon club heads, an aluminum alloy golf club head called AC4C according to the JIS standard has been proposed and has been put into practical use in some cases. The external shape and weight of such aluminum alloy club heads are comparable to Persimmon club heads, but the aluminum alloy AC4C that is the molding material for the club head has a tensile strength of 20% and a hardness of 20%. Since the head surface is approximately 60, even if the head surface is alumite-treated, the rigidity and mechanical strength suitable for a two-piece ball cannot be obtained, and cracks may occur during use. In addition, in order to increase the mechanical rigidity and strength of the head body, especially the face part, it is possible to provide a beam material in the cavity of the head body integrally with the same material as the head body. This increases the weight of the head body and, in turn, reduces the external shape of the club head, making it generally difficult to realize a club head that meets the user's wishes. In addition, because the main purpose of conventional aluminum alloy club heads was to have a weight and external shape compatible with Persimmon club heads, the weight balance of the head itself was almost ignored, making the club head difficult to use. It had some flaws. The present invention solves the above-mentioned drawbacks of the conventional club head, and its purpose is to make it possible to create a club head comparable in weight and shape to Persimmon club heads, while also being suitable for two-piece balls. To provide a golf club head that can secure strength and rigidity while also being able to adjust the weight and balance thereof.For this reason, the golf club head of the present invention is a golf club head that complies with the AMS standard and contains Ag and Cu in the molding material of the head body. An aluminum alloy equivalent to 4228 is used, which improves tensile strength, hardness, and corrosion resistance, allowing the shape of the head body to be expanded, and by providing a sole plate, it is possible to adjust the weight and balance of the head body. This is what I did. Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. 1 and 2 show an example of a golf club head according to the present invention, that is, a golf club head commonly referred to as a golf club head or a driver. are face part 2, top part 3, sole part 4,
It has a toe portion 5, a heel portion 6, and a back portion 7, and a shaft attachment neck 8 projects obliquely upward from the heel portion 6. The head body 1 having such a shape is made of Ag (silver) 1
The sole part 4 of the head body 1 is integrally formed by casting using an aluminum alloy (corresponding to AMS standard 4228) containing 4% and 4% Cu (copper).
The opening is closed by a weight made of a metal material such as stainless steel and a sole plate 9 for balance adjustment, and the cavity 1a of the head body 1 closed by the sole plate 9 is filled with a filling material such as foamed resin. 10 is filled. Further, the outer surface of the head body 1 is alumite-treated if necessary.

[Table] As is clear from Table 1 above, the tensile strength and hardness of the aluminum alloy used to form the golf club head of the present invention are twice that of the conventional AC4C aluminum alloy. This means that a metal club head with hardness, strength, and rigidity suitable for a two-piece ball can be realized without the need for special beams or the like in the cavity as in the past, and that the external shape can be made similar to that of a Persimmon club head. It is possible to provide a golf club head that can be made similar in shape and weight and meets the wishes of general users. Furthermore, by attaching the sole plate 9, it becomes possible to adjust the weight and weight balance of the head body, which was previously impossible. As described above, according to the present invention, an aluminum alloy corresponding to AMS standard 4228 containing Ag and Cu is used as the molding material for the golf club head.
A club head with hardness, strength, and rigidity suitable for a two-piece ball can be realized, and its external shape can be easily realized to correspond to that of a Persimmon club head. Furthermore, since the sole plate is provided, it is possible to adjust the weight of the head body and the weight balance, which was previously impossible.

[Brief explanation of drawings]

FIG. 1 is an external view showing an example of a golf club head according to the present invention, and FIG. 2 is a sectional view taken along the line -- in FIG. DESCRIPTION OF SYMBOLS 1... Head main body, 1a... Cavity, 2... Face part, 3... Top part, 4... Sole part, 5... Toe part,
6...Heel part, 7...Back part, 8...Net, 9...
sole plate, 10... filler;

Claims (1)

[Scope of utility model registration request] In the molding material used to form the club head body,
A golf club head characterized in that an aluminum alloy corresponding to AMS standard 4228 is used, and a sole plate for weight and balance adjustment is provided in the sole portion of the club head body.