JPH0745243Y2 - Golf wood club - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a golf wood club.

[Conventional technology and its problems]

Although the heat of golf has spread rapidly in recent years, there are wood clubs widely used in the past as shown in FIGS. 7 and 8.

This is a so-called driver club, the whole of which is indicated by (1), and a grip portion (3) is formed at the upper end of the shaft (2) and a head portion (4) is formed at the lower end. .

The head part (4) is mainly made of wood (Persimmon),
A striking surface (face) (6) having a large R is formed on one surface, and a face insert (7) is attached to the center portion.

As shown in FIG. 8, a lump (9) made of lead is embedded inside, and a sole plate (1
0) is installed. A back metal (8) is attached to the opposite side of the face (6).

The club (1) as described above has been well known for a long time, but the faces (6) and (7) are made of wood and have a small resilience against the ball, which is unsatisfactory for a golfer who desires a great flight distance. It was

In recent years, a so-called metal head club (11) shown in FIG. 9 has been developed in response to this. In this, the entire head (12) is made of metal, for example, stainless steel, and a hollow (14) is formed in a thick wall wall (13).

According to such a club (11), since the face is made of stainless steel, the repulsive force against the ball is large, and the flight distance of the ball is also larger than that of the club (1) of FIG. 7, so that it is widely used for golfers. Further, recently, in such a metal head (12), the moment of inertia around the center of gravity of the head is larger than that of the head (4) in FIG. 7, so that the hitting point of the ball is slightly deviated from the center of gravity. However, it has been theoretically clarified that the flight distance does not decrease so much and the flight course does not bend.

However, many golfers still want to increase the straight flight distance, which is a long-standing issue for golf makers.

[Problems to be solved by the invention]

The present invention has been made in view of the above problems, and an object of the present invention is to provide a wood club capable of further increasing the flight distance of a ball as compared with a conventional club.

[Means for solving problems]

The above object is a face insert including a face surface portion formed by forming a recess in at least a central portion of a face of a wooden head portion, and compressing and molding diamond powder into the recess portion, and a pedestal made of cemented carbide adhered to the face surface portion. Is fixed to the head and the surface of the face surface portion is polished to achieve the above.

[Action]

The compression molded diamond powder has a modulus of elasticity when compared with metals such as austenitic stainless steel,
The compressive strength, impact strength, hardness, and anti-segregation force are incomparably high, and therefore the ball repulsion is large. Therefore, the flight distance can be greatly increased as compared with the conventional Persimmon head. Also, the compression-molded diamond powder has a large specific gravity, and even if the ball hitting point deviates slightly from the center of gravity of the metal head, it straightens,
It has been theoretically clarified that the reason why it is possible to fly without reducing the flight distance is that the moment of inertia around the center of gravity is large, but from this point as well, diamond powder has a specific gravity. Because of its large shape, the moment of inertia around the center of gravity can be increased due to its shape, so even if the ball is hit with a slight deviation from the center of gravity, it can also fly straight and without dropping the flight distance. It is a thing.

〔Example〕

Hereinafter, a wood club according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the whole club, which is indicated by (30), and a head portion (32) according to the present invention is integrally formed at the lower end of the shaft (31).

As shown in Fig. 2, the body is made of wood, such as Persimmon (3
3), the back metal (34) is attached to the rear part as usual, the sole plate (35) made of metal is attached to the lower surface, and the lump (38) made of lead is inside. ) Is buried. The face insert (36) according to the present invention is fitted into the face (37). The face insert (36) is a face surface part (54) formed by compression-molding artificial powdered diamond of 3 microns to 10 microns at a temperature of 1000 ° C or higher under a pressure of 7,000 mPA, and a cemented carbide (53) as a pedestal. )
It is configured by being bonded to a (for example, titanium) layer. Further, the face surface portion is polished and has a gloss. As shown in Fig. 1, this shape is almost H-shaped, but a screw hole (39) is formed in the center part thereof, and a flat screw (52) is inserted into this to form a persimmon part (33). It is fixed by screwing.

The wood club (30) according to the present invention is configured as described above. The face insert (36) is formed by compression molding powdered diamond of 3 to 10 microns.
The face surface portion (54) has physical characteristics as shown in Table 1.

That is, the elastic modulus is much larger than that of metal, and other values such as compressive strength, impact strength, hardness, and segregation force are much higher than those of metal. Due to these physical characteristics, when the golfer grips the grip portion of the wood club (30), swings in a known manner, and hits the ball with the face insert (36), the flight distance becomes far longer than the conventional physical characteristics. It is estimated that

Although the face insert (36) is almost H-shaped in this embodiment, it has been found that the greatest recoil force is obtained when the ball is hit at the P portion. That is, the flight distance is the maximum.

3A to 6A and 3B to 6B show face inserts (A) to (D) of another embodiment,
In FIG. 3A, the face surface portion (40) has a triangular shape.
Is bonded to the cemented carbide (41). Face part (4
0) has the same structure as that of the above-mentioned embodiment, and is 3 microns to 10
It is made by compressing and molding micronized artificial diamond powder. Also, as shown in FIG. 3B, the face surface portion (40)
Is formed with a radius of 100 to 250 mm, which makes the resilience greater. FIG. 4A shows a substantially rectangular shape, and the face surface portion (42) also has the same structure as that of FIG. 3A and is also backed up by being adhered to the cemented carbide (43). As shown in FIG. 4B, it is also molded to 100 to 250 mm radius. The face surface portion (4 in FIGS. 5A and 6A)
4) (46) are trapezoidal and circular, respectively, but these are also processed to 100-250 mm R as shown in FIGS. 5B and 6B, and are made into cemented carbide (45) (47). It is glued. As for the means for attaching to the club head, a screw hole may be formed in the central portion in the same manner as in the above-mentioned embodiment, and a flat screw may be inserted into the screw hole and screwed into the persimmon portion, or the persimmon portion may be provided with a 3B portion. A recess having a sectional shape as shown in FIGS. 6B is formed, and face inserts (A) to (D) are formed in the recess.
May be fitted and adhered to the persimmon portion. It is obvious that such a club also has the same effect as that of the above embodiment.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made based on the technical idea of the present invention.

For example, back metal and lead may be omitted. This is because the aggregate of diamond has a sufficiently large specific gravity, so that the overall balance or the moment of inertia about the center of gravity can be optimally selected by these shapes.

In addition, since the moment of inertia around the center of gravity is larger in the metal head than in the Persimmon head, it has been theoretically clarified that the ball can be thrown straight even if it deviates from the center of gravity, without dropping the flight distance, Since the diamond powder of the face insert of the present embodiment has a large specific gravity, the moment of inertia around the center of gravity can be made larger than that of the metal head by appropriately adopting these shapes, and therefore, even if it is slightly deviated from the center of gravity, it is straight. In addition, it is possible to achieve the effect of being able to fly the ball without reducing the flight distance.

Further, the shape of the face portion of the diamond powder is not limited to the shape of the above embodiment, and various shapes may be adopted depending on the moment of inertia around the center of gravity.

Alternatively, instead of the lead at the conventional position, a compression molded diamond powder may be embedded.

In the above examples, the diamond powder of 3 to 10 microns was compression molded, but the powder particle size is not limited to this range. Also, 70 at temperatures above 1000 degrees Celsius
Sintering was performed at a pressure exceeding 00 mPA, but the temperature and pressure conditions may be changed as appropriate.

Further, in the above-mentioned embodiment, the impact effect is aimed by reducing the surface roughness by polishing the face portion of diamond powder after sintering.

[Effect of device]

As described above, according to the wood club of the present invention, the flight distance can be made larger than that of the conventional wood club, and the moment of inertia around the center of gravity can be made large even if it is slightly deviated from the center of gravity. You can fly straight without dropping the distance.

[Brief description of drawings]

1 is a partially cutaway front view of a club according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG.
Figures 6A to 6A are plan views of the face insert of another embodiment,
FIGS. 3B to 6B are side views of the face insert, and FIG.
FIG. 8 is a partially cutaway front view of a club composed of a conventional Persimmon head, FIG. 8 is a sectional view taken along the line VII-VII in FIG. 7, and FIG. 9 is a front view of a club composed of a metal head. In the figure, (30) …… Wood club (36) (A) to (D) …… Face insert (40) (42) (44) (46) (54) …… Face surface

Claims (2)

[Scope of utility model registration request] 1. A face comprising a face portion formed by forming a recess in at least a central portion of a face of a wooden head portion and compressing and molding diamond powder therein, and a pedestal made of a cemented carbide adhered to the face portion. A wood club for golf, wherein an insert is fitted, fixed to the head, and a surface of the face surface portion is polished. 2. The compression molding at a temperature of 1000 degrees Celsius or higher,
The golf wood club according to claim 1, wherein the wood club is made under a pressure of 7,000 mPA or more.