JPS6055972A - Wood head for golf club - 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 a wood head for a golf club.

Conventionally, complementary heads have been known as wood heads for golf clubs (hereinafter abbreviated as heads).
The quality of supplementary material heads varied due to dimensional changes and non-uniformity of the material. Therefore, WPC (Wood-plastj-
Ccombinations) heads and carbon fiber reinforced plastic (hereinafter abbreviated as C]-I''J-<P) heads are well known.

Since these WPC heads and CFRP heads are heavy in weight, for example, WPC heads and CFRP heads are not shown in FIGS. 2 and 3.
Like the head, a large cavity 2 is provided in the center of the sole side of the head 1, and a core material 3 made of foamed synthetic resin is provided in the cavity.
Some forms of intervening are known.

A substantially similar method is also adopted for CFRP heads. However, most of these hollow parts focus on reducing the weight of the head, and the strength of the head, how to attach the face insert, the position of the center of gravity of the head, and weight distribution are secondary considerations. Ta. Therefore, it had the following drawbacks.

Since the fifJ head has a large cavity, repeated hitting of the ball will repeatedly generate impact stress on the head itself, which can cause cracks or damage to the relatively thin face surface. There was a fear that it would happen. Furthermore, when a head with a large cavity is used with a separate face insert, the thickness of the face of the head itself decreases, resulting in a decrease in strength and a decrease in the coefficient of repulsion of the ball. This resulted in a decrease in the flight distance ratio (1) of the ball, as well as a duller hitting sound and poor feel.Also, the center of gravity of the head was not constant, and as a result, when hitting 11 balls, The launch angle of the ball is higher,
It had disadvantages such as being low. In addition, due to the weight distribution being closer to the heel of the head or closer to the toe of the head, new drawbacks tend to occur, such as the ball being sliced or hooked more easily when the ball is hit. As described above, conventional WPC heads and CFRP heads have drawbacks such as poor durability and feel, and unstable ball launch angle and directionality. Furthermore, since a large cavity is formed in order to reduce weight, the design range of the head itself is restricted.

In view of these conventional drawbacks, the present invention aims to improve the durability of WPC heads, FRP heads, and wood heads of the same type, which have a large hollow part in the center of the sole side of the head body, and to improve the feel of the head. This was done to improve the head's center of gravity and weight distribution, improve the launch angle and direction of the ball when it is hit, and increase the degree of freedom in head design. be.

One embodiment of the present invention will be described based on the drawings. As shown in FIGS. 4 to 5, a cavity 5 of an arbitrary shape is formed from the center of the sole side of the head 4, and the cavity 5 and A concave reinforcing portion 7 that continuously forms a notch 6 for attaching the 7 Ace insert I/component on the face surface, and fits into the cavity 5 and the notch 6 for attaching the face insert member.
This wood head for a golf club is characterized in that a head reinforcing part stand formed by integrally molding a face insert part 8 and a face insert part 8 is attached and integrated, and is completed by fixing a sole plate 12.

In the head of the present invention configured as described above, unlike a conventional head having a hollow portion, the hollow portion 5 and the face portion have a head reinforcing portion in which the concave reinforcing portion 7 and the face insert portion 8 are integrally molded. Since the member 9 is attached, the hollow part 5 is reinforced from the inside, and the face part has a thicker wall thickness and is integrated with the concave reinforcing part 7, so the strength and coefficient of restitution of the head are significantly improved. However, even if the ball is hit repeatedly, there is no risk of cracks or breakage on the face surface as in the conventional case, and durability is significantly improved. Furthermore, since the coefficient of restitution is improved, the flight distance of the ball is increased, the hitting sound is pleasant, and the feeling is also improved. Other embodiments of the head reinforcing member 9 of the present invention, as shown in Figs. If you store a weight in the weight adjustment weight storage section located at the rear of the head, the center of gravity will be at a lower position behind the head, the ball will launch at a higher angle, and the moment of inertia of the head will increase, making it a little sweeter. Even if the ball is hit off the spot, there is no fear that the flight direction of the ball will be adversely affected, and the feeling when hitting the ball is also good. By storing weights in the weight adjustment weight storage sections 10 corresponding to the toe and heel sides of the head, the swing balance of the head is improved, the ball is less likely to hook or slice, and the directionality is improved. This results in effects such as improved performance.

Furthermore, as another embodiment of the present invention, as shown in FIG. It is also possible to change the center of gravity position and weight distribution by changing the thickness and width. Further, as shown in FIG. 11, it is also possible to form the face insert portion 8 of the head reinforcing member 9 into a shape substantially equal to the face surface. In this case, even if the ball is hit with the right part of the face, the flight distance will not decrease much. Furthermore, even when hitting a ball against a hard two-piece pole, the face surface does not become uneven. Note that since the shape of the face insert portion is approximately the same as the face surface, it cannot be installed from the sole side as in the other embodiments, but is inserted and fitted from the face surface.

As described above, the wood head for a golf club according to the present invention has better durability and feel than conventional WPC heads or FRP heads that have large cavities, and allows for adjustment of gravity and weight distribution. Therefore, the degree of freedom in design is improved.

The materials for the head reinforcing member 9 according to the present invention include:
Fiber-reinforced plastics (RP) made of carbon fiber, glass fiber, and other reinforcing fibers, aluminum alloys and other light alloys, fiber-reinforced metals (FRM), 211 ceramics, and fiber-reinforced thermoplastics (FR)
Materials such as TP) are appropriately selected and used. In particular, when carbon fiber reinforced plastic (CFRP) is used, in addition to the above effects, vibration damping properties are also good.
Furthermore, in addition to the effect of improving the feel when hitting the ball, the weight of the head reinforcing member itself can be reduced, further increasing the degree of freedom in head design.

It is also desirable to interpose a foamed synthetic resin or other core material in the concave reinforcing portion 7.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a wood head for a golf club. FIG. 2 is a perspective view showing a conventional head having a large cavity. FIG. 3 is a sectional view showing a conventional head in which a foamed synthetic resin is interposed in a large cavity. FIG. 4 is a perspective view showing a state in which the head reinforcing member of the present invention is attached to a head. FIG. 5 is a sectional view showing an example of the head of the present invention. FIGS. 6 and 7, FIGS. 8 and 9, and FIGS. 10 and 11 are front and back views of the spring 1 showing the second implementation side of the head reinforcing member of the present invention. ■... Head, 2... Cavity, 3... Core material, 1
...Head, 5...Cavity part, 6...Notch part, 7
... Concave reinforcing part, 8... Face insert part, 9... Head reinforcing member, 10... Weight storage part, 1]
... Tsuba, 12... Fist sole board.

Claims (1)

[Scope of Claims] ■ A cavity of an arbitrary shape is provided in the head body from the center of the sole side, and a notch for attaching a face insert member is formed in the face surface part continuous with the cavity, and the cavity is and a head reinforcing member for a golf club, characterized in that a head reinforcing member is integrally formed by integrally molding a concave reinforcing portion that fits into a notch for mounting the face insert member and a face insert portion. 2. The wood head for a golf club according to claim 1, wherein a weight-adjusting weight storage portion is formed in the concave reinforcing portion of the head reinforcing member. 3. Wood head 0 for a golf club according to claim 1, wherein a flange for weight adjustment is formed in the opening of the concave reinforcing portion of the head reinforcing member.