JPH0984903A - Shaft mounting structure of golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to prevent the removal of a shaft from a hosel by preventing the peeling of the adhesion between this shaft and the hosel. SOLUTION: Plural notches 5 of a prescribed length are formed from the front end the shaft 4 toward the base end thereof and the inner side of the sole 3 of a head body 1 is projectingly provided with a cylindrical body 6 to be inserted into the hollow part 4A at the front end of the shaft 4. Plural vane parts 7 to be inserted into the notches 5 of the shaft 4 are formed on the outer periphery of this cylindrical body 6. The cylindrical body 6 is inserted into the hollow part 4A of the shaft 4 and the vane parts 7 are inserted into the notches 5 of the shaft 4, respectively, by which the front end side of the shaft 4 is fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft mounting structure for a golf club, and more particularly to a mounting structure capable of securely fixing a shaft to a head body.

[0002]

2. Description of the Related Art A conventional shaft mounting structure is shown in FIG.
As shown in FIG. 1, the head body 1 and the hosel 2 are integrally molded with a metal material, and the shaft 4 is extended to the sole 3 of the head body 1.
It is known to have inserted. The hosel 2 has a short outer protruding portion or eliminates this portion, and
The center of gravity has been lengthened to lower the center of gravity. The shaft 4 is fixed to the hosel 2 with an adhesive, and the tip of the shaft 4 is fixed to a hole formed in the sole 3. Further, the side wall of the head body 1 on the heel side constitutes a part of the inner cylinder 2A.

[0003]

When a ball is hit with a head, a very large impact force is applied to the tip of the shaft. Further, due to the collision with the ball, a large rotational force is applied to the head, especially at an off-center hit, and the rotational force of this head is also transmitted to the shaft. When the head tries to rotate, the shaft gripped by the golfer resists the rotation of the head due to the grip force, so that the hosel and the shaft try to rotate relatively. As a result, there is a risk that the adhesive that fixes the shaft to the hosel may peel off.

Therefore, the present invention shortens the hosel,
Alternatively, even if the center of gravity is lowered and the center of the face is eliminated by eliminating the external protruding portion, the peeling of the adhesive between the shaft and the hosel can be prevented, and the shaft mounting structure for the golf club that prevents the shaft from coming out of the hosel. The purpose is to provide.

[0005]

In order to achieve the above-mentioned object, according to the present invention, a plurality of cuts having a predetermined length are formed from the shaft tip to the base end, and the inside of the sole of the head body is provided with a hollow portion inside the shaft tip. A cylindrical body to be inserted into
A plurality of blades that are inserted into the cutouts of the shaft are formed on the outer circumference of this tubular body, and the tubular body is inserted into the hollow portion of the shaft, and the blades are inserted into the cutouts of the shaft to secure the tip side of the shaft. Is.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

In the embodiment of the present invention shown in FIG. 1, a plurality of cuts 5 having a predetermined length are formed from the tip end of the shaft 4 toward the base end, and the shaft 4 is provided inside the sole 3 of the head body 1.
A cylindrical body 6 to be inserted into the hollow portion 4A at the tip of
A plurality of blades 7 to be inserted into the notches 5 of the shaft 4 are formed on the outer circumference of the tubular body 6. The tubular body 6 is inserted into the hollow portion 4A of the shaft 4 and the blade portion 7 is inserted into the notch 5 of the shaft 4 to fix the tip end side of the shaft 4. As means for projecting the tubular body 6 inside the sole 3,
The screw 8 is screwed into the tubular body 6.

FIG. 2 shows a shaft 4, a tubular body 6 and a screw 8. An internal thread portion 9 is formed on the inner peripheral surface of the tubular body 6, and the female thread portion 9 is passed through the sole 3 to penetrate it. The screw 8 is screwed in. In this embodiment, the notches 5 are formed at four places, and four blade portions 7 are also formed. When the screw 8 is used as a means for fixing the tubular body 6 to the sole 3, the sole 3 has a hole into which the screw 8 is inserted.

In the embodiment shown in FIG. 3, the screw 8 is used to form the cylindrical member 6
An example in which the tubular body 6 is welded to the sole 3 or integrally formed with the sole 3 without fixing is shown.

Although the shaft mounting structure in the wood club is shown in the above-described embodiment, the shaft 4 can be mounted in the head body 1 in the same manner in the iron club.

[0011]

As described above, according to the present invention, a plurality of cuts having a predetermined length are formed from the tip of the shaft toward the base, and the notch is inserted inside the sole of the head body into the hollow portion of the tip of the shaft. A cylindrical body is provided so as to project, and a plurality of blades are formed on the outer periphery of the cylindrical body to be inserted into the cuts of the shaft. The cylindrical body is inserted into the hollow portion of the shaft, and the blades are inserted into the cuts of the shaft. Since the tip side is fixed, the shaft is prevented from rotating with respect to the hosel. Therefore, there is no fear of peeling of the adhesive, and the shaft can be prevented from coming off. In addition, since the relative rotation of the shaft and the hosel is prevented, the length of the shaft mounting portion can be shortened.

[Brief description of drawings]

FIG. 1 is a sectional view showing a preferred embodiment of the present invention.

FIG. 2 is a perspective view showing a shaft, a tubular body, and a screw.

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

FIG. 4 is a sectional view showing a conventional example.

[Explanation of symbols]

 1 Head body 2 Hosel 3 Sole 4 Shaft 4A Hollow part 5 Notch 6 Cylindrical body 7 Blade part

Claims (1)

[Claims] 1. A plurality of cuts having a predetermined length are formed from the tip of the shaft toward the base end, and a cylindrical body to be inserted into the hollow portion of the shaft tip is projectingly provided inside the sole of the head main body. A plurality of blades to be inserted into the notches of the shaft are formed on the outer circumference of the shaft, and the tubular body is inserted into the hollow portion of the shaft, and the blades are inserted into the notches of the shaft to fix the tip end side of the shaft. Golf club shaft mounting structure.