JPS59177075A - Golf club head - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to golf club heads.

The traditional iron-type golf club head is ko.

All contact surfaces with the Rufball were made of metal (steel or stainless steel). This type of club head has limitations in increasing flight distance (hereinafter referred to as carry).

In addition, with the recent appearance of two-piece balls, flight distance has increased further, but compared to conventional thread-wound balls, the contact time with the club head is shorter, and the ball feels harder and the ball However, the shortcomings such as "fast speed" have become a problem. In particular, iron-type golf clubs require control over the direction and distance of the ball, and the feel when hitting is an important issue.

The present invention was made in view of this point, and it increases the carry (flight distance), lengthens the contact time, improves the controllability of the direction and distance of a two-piece ball, and improves the feel when hitting. The purpose is to improve. Therefore, a feature of the present invention is that the contact surface with the golf ball is made of a component having a lower modulus of elasticity than steel.

The present invention will be explained below based on illustrated embodiments.

In FIGS. 1, 2, and 3, 1) indicates the golf club head, and 2) indicates the contact surface with the golf ball, which corresponds to the central portion of the face surface. The club head (1) includes a head body (3) made of general steel or stainless steel, and a recess (4) formed on the face side of the head body (3). 9'ljl' embedded in
, with a small l ratio (11J).Specifically, a concave part (4) is formed with a size close to almost the entire surface, leaving only the peripheral edge of the face surface, and a concave part (4) is formed in this, and the component parts are (5) is fitted and fixed with fixing tools (6) such as screws.Of course, it is also preferable to fix with an adhesive or to use a combination of the fixing tool (6) and an adhesive.

Therefore, the component (5) is made of steel (modulus of elasticity 21000 K97mA), which is the material of conventional club heads.
Synthetic resins, various composite materials, etc., which have a lower elastic modulus than that of
− can be used. Particularly desirable are synthetic resins having an elastic modulus of 30 to 2,000 and 97 mA, such as ABS resin (elastic modulus of 210 to 3]-5K9 B, H), ionomer resins, polycarbonate, and the like.

Next, as in another embodiment shown in FIG.
The recessed part (4) of 3) has a dovetail-shaped cross section with its inner side enlarged, and the structural member (5) and the main body (3) are fitted into this in an embedded manner.
) increases the adhesion strength. In addition, in FIG. 5, the entire face side of the head body (3) and a part or all of the peripheral surface are covered with the component (5), and the entire face surface is designated as the component part 0 (5). Ru. In yet another embodiment shown in FIG. 6, the entire head (1) consists only of a component (5) with a modulus of elasticity as described above.

Next, as a specific example of the present invention, ABS resin (modulus of elasticity 25
0/-), ionomer resin (modulus of elasticity 200 Ky
Table 1 and Table 1 show the actual measurement results of a comparison between the head (1) in which the component (5) consisting of /=u) is provided on a part of the face surface as shown in Figs. It is shown in Table 2. Table 1 shows the number 7 iron, Table 2 shows the number 9 iron, and two-piece golf balls are used.

Table 1 (No. 7 iron) Table 2 (No. 9 iron) From Tables 1 and 2, it is clear that the launch angle increases and the spin rate decreases significantly, and the carry also increases.

Moreover, due to the ABS resin and ionomer resin component (5), the contact time when hitting the golf ball becomes longer (105 to 130, assuming the contact time of the conventional product as 100).
), it has become clear that the feeling of hitting the ball is particularly improved, and control of the direction and distance of the ball is also significantly easier.

As described in detail above, the present invention is characterized in that the contact surface with the golf ball is made of a component with a low modulus of elasticity, and the contact time when hitting the ball is extended, improving the feel and improving the control performance. It has a great effect. Moreover, the amount of backspin decreases, the launch angle increases, and carry (flying distance) can be significantly increased.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a front view, Fig. 3 is a cross-sectional view taken along line A-A in Fig. 2, and Figs.
FIG. 6 is a cross-sectional view of another embodiment. (2)...Contact surface, (5)...Component member. Patent applicant: Sumitomo Com Industries Co., Ltd. Procedural amendment 1. Indication of the case 1982 Patent side No. 53339 2, Name of invention Golf club head 3, Person making the amendment Relationship to the case Name of patent applicant Title Sumitomo Rubber Industries, Ltd. 4, Ihe-Cho 91, ◎5301 Word 1 (06) 344-
0177 No. 6, subject of correction

Claims (1)

[Claims] / A Colets club head characterized in that the contact surface with a golf ball is made of a component having a lower modulus of elasticity than steel. 1. The golf club head according to claim 1, having an elastic modulus of 03 to 5000 Kq/-. 3. The golf club head according to claim 1, wherein the constituent members are made of synthetic resin with an elastic modulus of 30 to 2000 kg/-.