JP2003144589A - Golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club which prevents such a failure as causing clearance between the hosel part and the socket of a club head under impacts by repeated hitting with the golf club. SOLUTION: A tapered part 6 reducing upward from the outer circumferential surface thereof is formed on the outer periphery of the upper end part 4 of the hosel part 3 while a slope 10 is formed at the lower end part 9 of the socket 8 being inclined inward so as to abut on the tapered part 6 of the hosel part 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club having an improved structure of a hosel portion and a socket of the head for inserting and fixing a shaft into a head such as a wood golf club or an iron golf club. It is about.

[0002]

2. Description of the Related Art Conventionally, golf clubs are shown in FIGS.
As shown in FIG. 3, a shaft insertion hole 34 is formed in the hosel portion 32 that constitutes the head 31, and a shaft 37 is inserted into and fixed to the shaft insertion hole 34. A socket 35 is attached to the shaft 37 between the upper end 33 of the hosel portion 32 and the outer periphery of the shaft 37 in a state of being fitted to the shaft 37. The socket 35 is made of various materials such as synthetic resin, and is reinforced to prevent damage to the insertion end portion of the shaft 37, which concentrates stress at the time of hitting the ball, and the shaft 37 and the hosel portion 32. It is provided for the purpose of improving the appearance, such as eliminating the steps between and.

In such a structure of the joint portion between the head 31 and the shaft 37 of the golf club, as shown in FIG. 5, the lower end portion 36 of the socket 35 and the hosel portion 3 are provided.
The upper ends 33 of the two are flat, so that the lower end 36 of the socket 35 and the upper end 33 of the hosel part 32 are planarly bonded.

[0004]

When a ball is hit with a golf club, the shaft bends due to the impact of the hit. At this time, as shown in FIG. 6, the socket 35 follows the bending of the shaft 37 with respect to the bending of the shaft 37 due to the impact at the time of impact, but the hosel portion 32 does not follow. Further, since the lower end portion 36 of the socket 35 and the upper end portion 33 of the hosel portion 32 of the head 31 are surface-bonded, when a repeated impact force is applied by repeated impact, as shown in FIG. At the time of flexing, the lower end 36 of the socket 35 is pressed against the wall of the upper end 33 of the hosel portion 32 on the compression side of the shaft 37, and the upper end 33 functions as a stopper. When the socket 35 is pushed up and the pulling side is recoiled, the planar adhesive portion is peeled off, and the bending of the shaft 37 is restored, as shown in FIG.
There was a problem that there was a gap between the No. 5 and the hosel part 32.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a golf club improved so as to prevent the problem that a gap is formed between the hosel portion of the head and the socket due to the impact of repeated hits of the golf club. It is in.

[0006]

In order to achieve the above object, the present invention has the following constitution. In the golf club according to claim 1 of the present invention, the shaft is inserted and fixed in the shaft insertion hole formed in the hosel portion of the head, and the socket is provided between the upper end portion of the hosel portion and the outer circumference of the shaft. In the golf club to be equipped,
A taper portion is formed on the outer peripheral edge of the upper end portion of the hosel portion, the taper portion being reduced upward from the outer peripheral surface of the hosel portion, and the lower end portion of the socket abuts the taper portion of the hosel portion. As described above, the golf club is characterized in that an inclined surface is formed inward.

A golf club according to a second aspect of the present invention is the golf club according to the first aspect, wherein the taper portion has an inclination angle of 20 ° or more and less than 70 °. It is a golf club that does.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail based on the embodiments shown in the drawings. 1 is a perspective view illustrating a golf club according to an embodiment of the present invention.
FIG. 3 is an enlarged cross-sectional view of an A portion for explaining a fixing structure between the hosel portion and the shaft in the hosel portion of FIG. 1, and FIG. 3 is a cross-sectional view showing another embodiment.

As shown in FIG. 1, the golf club 1 of this embodiment is forged with a metal material such as soft iron, carbon steel, Be-Cu, stainless steel, aluminum alloy, magnesium alloy, titanium or titanium alloy. The head 2 is formed by casting and has a shaft insertion hole 7 at one end thereof.
A head 11 is integrally formed with a hosel portion 3 provided with a shaft 11, and a shaft 11 is inserted into and fixed to the shaft insertion hole 7. A socket 8 is fitted between the upper end 4 of the hosel portion 3 and the outer circumference of the shaft 11 in a state of being fitted to the shaft 11.

As shown in FIG. 2, the structure of the contact portion between the head 2 and the socket 8 in the fixed portion is such that the hosel portion 3 has an outer peripheral edge of the upper end portion 4 of the hosel portion 3. A tapered portion 6 is formed so as to reduce upward from the outer peripheral surface 5. Further, the lower end portion 9 of the socket 8 is formed with an inclined surface 10 that is inclined inward so as to contact the tapered portion 6 of the hosel portion 3.

The taper portion 6 has an inclination angle 21 of 20 which is an angle formed by the taper portion 6 and the shaft axis 20.
It is preferable that the angle is not less than 70 ° and less than 70 °. If the inclination angle 21 is less than 20 °, the wall thickness of the hosel portion 3 becomes too thin and the durability deteriorates, which is not preferable. On the other hand, if the inclination angle 21 is 70 ° or more, stress concentrates on the contact portion between the hosel portion 3 of the head 2 and the socket 8, which is not preferable.

Further, in FIG. 2, the lower end portion 9 of the socket 8 is formed with an inclined surface 10 so as to abut substantially the entire surface of the tapered portion 6 of the hosel portion 3, but as shown in FIG. The sloped surface 10 may be formed so that the outer peripheral end of the lower end portion 9 contacts the tapered portion 6.

Although the present embodiment and the drawings have been described based on the wood club head, the present invention is not limited to this and may be applied to an iron club head.

[0014]

As described above, according to the golf club of the present invention, the outer peripheral edge of the upper end portion of the hosel portion of the head constituting the golf club is shaped so as to shrink upward from the outer peripheral surface of the hosel portion. A tapered portion is formed, and
The lower end of the socket is formed with an inclined surface that is inclined inward so as to come into contact with the taper portion of the hosel portion, so that the stress is dispersed even if a large stress due to impact is applied. This can prevent a gap from being formed between the hosel portion of the head and the socket.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a golf club of the present invention.

FIG. 2 is an enlarged sectional view of an A portion for explaining a fixing structure of a hosel portion and a shaft in the hosel portion of FIG.

FIG. 3 is a cross-sectional view showing another embodiment.

FIG. 4 is an overall perspective view of a conventional golf club.

FIG. 5 is an explanatory view showing a conventional example.

FIG. 6 is an explanatory diagram showing a conventional example.

FIG. 7 is an explanatory view showing a conventional example.

[Explanation of symbols]

1 golf club 2 heads 3 Hosel part 4 upper end 5 outer peripheral surface 6 taper part 7 Shaft insertion hole 8 socket 9 Lower end 10 slopes 11 shaft 20 shaft axis 21 Tilt angle 31 heads 32 Hosel part 33 Upper end 34 Shaft insertion hole 35 socket 36 Lower end 37 shaft

Claims (2)

[Claims] 1. A golf club in which a shaft is inserted and fixed in a shaft insertion hole formed in a hosel portion of a head, and a socket is mounted between an upper end portion of the hosel portion and an outer circumference of the shaft. A taper portion that shrinks upward from the outer peripheral surface is formed on the outer peripheral edge of the upper end portion of the hosel portion, and an inner side of the lower end portion of the socket is formed so as to contact the taper portion of the hosel portion. A golf club characterized in that an inclined surface is formed in the front. 2. The golf club according to claim 1, wherein the taper portion has an inclination angle of 20 ° or more and less than 70 °, which is an angle formed by the taper portion 6 and the shaft axis 20. .