JPH0235317Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to improvements in golf club heads, particularly golf club heads molded from synthetic resin.

In recent years, golf club heads, especially wooden club heads, have been made of synthetic resin materials, such as nylon or ABS resin mixed with short fibers such as carbon or glass fiber, instead of natural wood such as persimmon or cherry wood. Metal-based products that are mainly made of metal are emerging.

However, the former synthetic resin club head has excellent hardness and elasticity because it contains short fibers such as carbon and glass fiber, but on the other hand, it is difficult to hit the ball on the face. The impact is transmitted through the shaft to the hands, causing discomfort to the player. Furthermore, the latter type of metal club head also has the disadvantage that it transmits a similar or greater impact to the hand than the synthetic resin club head.

This idea solves the above conventional drawbacks,
The content of reinforcing short fibers mixed into the interior decreases as the distance from the club head face increases in the direction perpendicular to this, thereby providing a shock absorbing function when hitting the ball and easing the shock to the hands. The purpose of the present invention is to provide a golf club head with a high-quality golf club head.

Hereinafter, specific embodiments of this invention will be described with reference to the drawings.

1 to 5 show an example of a golf club head according to this invention. Reference numeral 1 indicates a club head body molded from a synthetic resin material, and this club head body 1 includes a face portion 2, a top portion 3,
It has a sole portion 4, a toe portion 5, a heel portion 6, and a back portion 7, and a neck (socket) 8 protrudes diagonally upward from the heel portion 6 of the head body 1. An insertion hole 9 for attaching a (not shown) is formed concentrically. In addition, as for the face portion 2 of the head body 1, as it is spaced apart from the surface of the face portion 2 in a direction perpendicular thereto, that is, as it goes from the face portion 2 toward the back portion 7, the inside of the head body 1 increases. It has a structure in which the content of reinforcing short fibers such as carbon and glass fibers that are mixed in is gradually reduced.

That is, the part that forms the face part A, where the ball is directly hit, is made of a thermosetting resin material such as epoxy containing 40% by weight of reinforcing short fibers, and surrounds the face part A. The front part B of the head thus constructed is made of a thermoplastic or thermosetting resin material containing 30% by weight of reinforcing staple fibers, and the remaining part C of the head body 1, that is, the top part 3, The sole portion 4, toe portion 5, heel portion 6, back portion 7 and neck 8 are made of a thermoplastic resin material containing 20% by weight of reinforcing short fibers.

In the club head constructed in this way, the face portion A where the ball is hit has sufficient hardness and elasticity, and the portion B that joins this and the remaining portion C are sequentially made of reinforcing short fibers. Since the amount of impact is small, the impact force on the face part A that occurs when the ball is hit is the same as the impact force on the face part B.
The remaining portion C sequentially absorbs and attenuates the ball, and as a result, it is possible to prevent the shock caused by a ball hit from being transmitted to the hand through a shaft (not shown).

Figure 6 shows another embodiment of this invention.
The face portion D, the head front portion E, and the remaining portion F constituting the head body 10 are manufactured separately,
After the face portion D is fixed to the face portion 12 of the head front portion E by gluing, screwing, etc., the hollow portion 1 of the remaining portion F constituting the head body 10 is
It is installed on 3.

In this embodiment, the face portion D, the head front portion E, and the remaining portion F constituting the head body 10 are the face portion A in the previous embodiment,
This corresponds to the head front part B and the remaining part C constituting the head body 1, respectively, and the synthetic resin material used, the reinforcing short fibers to be mixed, and the mixing ratio thereof are the same.

According to this embodiment, each part D manufactured separately
Since it is formed by assembling ~F, manufacturing is simpler than in the previous embodiment.

In addition, in the above example, the content of reinforcing short fibers was set to 3.
Although the explanation has been given on the case where the shock is divided into stages, it may be divided into four or more stages, and the impact force can be alleviated even in two stages.

Furthermore, the arrangement form of the portions with different reinforcing short fiber contents is not limited to that of the example,
It can be modified in various ways depending on the type and structure of the club head.

As described above, this invention has a structure in which the content of reinforcing short fibers mixed inside the club head is gradually reduced as the distance from the club head face is increased in a direction perpendicular to this. Even when the ball is hit, the impact force is absorbed and attenuated, so that the impact when the ball is hit is almost never transmitted to the hands through the shaft, which has the effect of preventing discomfort to the player. be.

[Brief explanation of the drawing]

Fig. 1 is an external view of the golf club head according to this invention, Fig. 2 is a plan view thereof, Fig. 3 is a bottom view, Fig. 4 is a side view, and Fig. 5 is taken along line V-V in Fig. 4. FIG. 6 is an exploded view showing another embodiment. 1, 10... Club head body, 2... Face portion, 8... Net, A, D... Face portion with the highest short fiber content, B, E... Portion with the second highest short fiber content, C and F are the parts with the lowest short fiber content.

Claims (1)

[Scope of utility model registration request] In a golf club head molded from a synthetic resin material mixed with reinforcing short fibers such as carbon or glass fibers, the amount of reinforcing short fibers mixed into the inside increases as the golf club head moves away from the face surface of the club head body in a direction perpendicular to this. A golf club head characterized by a stepwise reduction in content.