JP2821548B2 - Golf club - Google Patents

Description

The present invention relates to a golf club. More particularly, the present invention relates to a golf club having a head made of a head material having a wide sweet spot and a good rebound performance as a zinc-based reinforced composite material.

(Prior Art) Iron, stainless steel, beryllium copper alloy, bronze, aluminum alloy, and the like are used as materials provided in conventional golf club iron heads.

However, iron, stainless steel, beryllium copper alloy,
Since bronze and the like have a large specific gravity and therefore have a limited head size, only a narrow portion with a limited sweet spot is allowed. On the other hand, the specific gravity of an aluminum alloy or the like is too small, and it is necessary to make the head part a very large area in order to make the head part a predetermined weight. Therefore, there is a difficulty in swinging the club. . Further, metals such as iron, stainless steel, and aluminum alloy have a low inherent sound velocity, and cannot necessarily expect a large repulsive force. Therefore, the energy loss at the time of swinging out is large, and the flight distance is not large.

(Problems to be Solved by the Invention) It is an object of the present invention to provide an iron golf club having a moderate hitting surface area and therefore having a wide sweet spot.

Another object of the present invention is to provide an iron golf club capable of imparting an effective repulsive force to a hit ball, thereby reducing energy loss during swing-out and contributing to an increase in flight distance. .

(Means for Solving the Problems) The present invention relates to a golf club iron head, wherein zinc or a zinc alloy containing zinc as a main component is used as a matrix, and potassium titanate whisker, magnesium borate whisker, aluminum borate whisker, silicon carbide For golf clubs using a zinc-based reinforced composite material using 5-80% by volume of at least one reinforcing material selected from whiskers, alumina short fibers, ceramic short fibers, silicon carbide long fibers, alumina long fibers and graphite long fibers. Related.

As shown in Table 1, the specific gravity of the reinforcing material used in the zinc-based reinforced composite material of the present invention is very small as compared with iron, stainless steel, and zinc.
As shown in Table 1, the specific gravity is smaller than that of the conventional material. As a result, the use of the zinc-based reinforced composite material for the golf club iron head can appropriately increase the area of the ball striking surface, and accordingly, the sweet spot can be enlarged.

Further, while the natural sound speed of iron, stainless steel, aluminum alloy and the like is as low as 4900 to 5150 m / sec, the material used for the golf club iron head according to the present invention can be as high as 5500 m / sec. The higher natural sound velocity allows more effective repulsion to be imparted to the hit ball, thus reducing the energy loss during swing-out and contributing to an increase in flight distance. become.

Further, zinc or zinc alloy used as a matrix in the head for a golf club iron of the present invention is unsuitable as a head material by itself because of its softness.
As shown in the table, the hardness was also remarkably improved, indicating that it was sufficiently practical.

The content of the reinforcing material in the composite material of the present invention is not particularly limited, but is usually 5 to 80% by volume, preferably 10 to 60%.
It is.

The iron golf club of the present invention can be manufactured by a conventional method except that the above-mentioned composite material is used.

(Examples) Hereinafter, the present invention will be described with reference to Examples and Comparative Examples.

Example 1 A head made of a golf club iron having a loft angle of 37 degrees and a lie angle of 61 degrees was made of a zinc-based reinforced composite material containing magnesium borate whiskers at a volume ratio of 25%, and a steel shaft was attached to the head. Got an iron club. The club weighed 420 g.

Comparative Example 1 A steel shaft having the same loft angle and lie angle as in Example 1, a head made of SUS304 cast material, and a steel shaft having the same length and material as in Example 1 was attached, and a 7-iron club was similarly formed. Obtained. The club weighed 420 g.

Table 3 shows the difference between the ball hitting test results (distance and direction) and the hitting ball area of the iron clubs of Example 1 and Comparative Example 1.

Example 2 A head was made of a zinc-based reinforced composite material containing a golf club iron having a loft angle of 29 degrees and a lie angle of 60 degrees in a total volume of 10% of potassium titanate whiskers and 20% of silicon carbide whiskers in a total volume of 30%. A shaft made of carbon fiber reinforced plastic was attached to obtain a No. 5 iron club. The club weighed 395 g.

Comparative Example 2 A No. 5 iron club having the same weight and the same shaft as that of Example 2 was made of a SUS304 cast material head.

9 shows the results of a ball hit test by the machines of Example 2 and Comparative Example 2.

Average flight distance Example 2 198m Comparative example 2 177m Example 3 A head made of a golf club iron having a loft angle of 50 degrees and a lie angle of 63 degrees with a zinc-based reinforced composite material containing aluminum borate whiskers with a volume ratio of 27% by volume. Then, a shaft having the same quality as that of Example 1 was attached, and a pitching wedge club having a weight of 420 g was prepared.

Comparative Example 3 A loft angle of 48.5 degrees, a lie angle of 63 degrees, a head made of steel, and a shaft of the same quality as in Example 1 were attached.
A 0 g pitching wedge club was prepared.

9 shows the results of a ball hit test by the machines of Example 3 and Comparative Example 3.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor: Rio Matsumoto 3-2-2, Ote-dori, Chuo-ku, Osaka-shi, Osaka Otsuka Chemical Co., Ltd. (56) References JP-A-49-109216 (JP, A) JP-A-63-177878 (JP, A) JP-A-52-141254 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A63B 53/04

Claims (2)

(57) [Claims] 1. A golf club iron head, wherein zinc or a zinc alloy containing zinc as a main component is used as a matrix, and potassium titanate whiskers, magnesium borate whiskers, aluminum borate whiskers, silicon carbide whiskers, alumina short fibers, and ceramics are used. A golf club using a zinc-based reinforced composite material containing 5-80% by volume of at least one reinforcing material selected from short fibers, silicon carbide long fibers, alumina long fibers and graphite long fibers. 2. The golf club according to claim 1, wherein the reinforcing material is at least one selected from potassium titanate whiskers, magnesium borate whiskers, and aluminum borate whiskers.