JP2002186690A - Golf club and club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club whose balance is easily adjustable without decreasing the club shaft strength. SOLUTION: The shaft 2 is installed at a hosel holes 4 opened at one side of the head body 1. The hosel holes 4 consist of the first hole 5 and the second hole 6. The shaft 2 is attached at the first hole 5 and a weight adjustment 7 is installed at the second hole 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club and a golf club head.

[0002]

SUMMARY OF THE INVENTION As the golf population increases,
Golf clubs began to be mass-produced, but each golf club had its center of gravity set at the design stage,
When the weight of the shaft and the grip is determined, the position of the center of gravity is determined by the weight of the golf club head. For this reason, golf club heads have their respective standard weights determined according to the position of the center of gravity of the golf club, but in mass production, all golf club heads must be manufactured to the standard weight after completion. Was actually impossible. Therefore, a tolerance is set for the standard weight so that it falls within the range, and this tolerance is 4 g in the range.
And had Generally, it is difficult to adjust the balance of a head heavier than the standard weight, so that the head body is manufactured so as to be lighter than the standard weight, and the insufficient weight is adjusted by adding a weight when assembling the shaft.

As a method of adjusting the weight balance, for example, as shown in FIG. 4, a shaft hole 12 is formed in a golf club head 11 and a shaft 14 is attached to the shaft hole 12 via an adhesive 13. A metal powder 15 such as tungsten having a specific gravity heavy by its weight is weighed and put into a hollow portion 14A of a shaft 14 which is a hollow tube from a hand side. Was fixed to the lower end. In FIG. 4, reference numeral 17 denotes a ferrule.

Further, since the shaft 14 is adhered by the adhesive 13, the adhesive 13 is inserted into the shaft hole 12 as shown in FIG.
Put in more. Then, since the shaft 14 is a hollow tube and the center portion is hollow, the excess adhesive 13 enters the hollow portion 14A. Therefore, before the adhesive 13 solidifies, More elongated cylindrical lead 18
For example, a method has been adopted in which the lead 18 is fixed together with the adhesive 13 by solidifying the adhesive 13.

However, these conventional golf clubs have the following problems. That is, in the golf club which is balanced by the former method, the metal powder 15 is used as a balance adjusting material, but the powder has a high porosity and a large volume with respect to the weight, and the shaft 14
Since the inner diameter of the head is fixed, the metal powder 15 extends to the proximal side of the cavity 14A, and there is a problem that the position of the center of gravity of the originally designed head is deviated. Further, if the cork stopper 16 comes off, the metal powder 15
Can move in the hollow portion 14A of the shaft 14, which causes a problem that sound is generated. on the other hand,
In the golf club balanced by the latter method, the lead 18 is simply inserted because the lead 18 is inserted. However, if this operation is not performed efficiently, the adhesive 13 solidifies and the lead 18
Can not be fixed. In order to firmly fix the lead 18, the lead 18 must be buried in the adhesive 13 to some extent. The present inventors have also found that the mechanical strength of the shaft 14 is reduced by about 20 to 30%. Although the cause is not necessarily clear, if the adhesive 13 is solidified in the hollow portion 14A above the upper end A of the shaft hole 12, the shaft 14 in this portion is not solidified.
This is considered to be because the elasticity and the like are reduced and the impact at the time of hitting or the like is not alleviated and is directly transmitted to the shaft 14.

Accordingly, it is an object of the present invention to solve the above-mentioned problems and to provide a golf club in which balance adjustment is easy and shaft strength is not reduced. Another object of the present invention is to provide a golf club head that can easily adjust the weight and does not reduce the shaft strength.

[0007]

According to a first aspect of the present invention, there is provided a golf club in which a shaft is attached to a hosel hole opened on one side of the head body, and the hosel hole is located closer to the opening than the opening. It comprises a first-stage hole and a second-stage hole, wherein a shaft is mounted in the first-stage hole and a weight for weight adjustment is installed in the second-stage hole. . As a result, the golf club balance can be adjusted simply by inserting a weight for weight adjustment into the second-stage hole and then attaching the shaft to the first-stage hole. Further, since the weight for weight adjustment is disposed at the bottom of the hosel hole, the center of gravity of the golf club is good. In addition, since no powder is used, there is no danger of noise, and furthermore, there is no need for the adhesive to be present above the upper end of the shaft hole in the cavity of the shaft, so that the strength of the shaft may be reduced. Absent.

A golf club head according to a second aspect of the present invention comprises a head main body having a hosel hole on one side, wherein the hosel hole has a first stage hole and a second stage hole from the opening side. A shaft is mounted in the first-stage hole, and a weight for weight adjustment is installed in the second-stage hole.
It is within 5 g. This only requires preparing weights for weight adjustment in units of 0.5 g or less.
This makes it possible to mass-produce golf club heads having a standard weight closer to the conventional one, and to easily achieve the balance set for the golf club.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the golf club head and golf club of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the golf club of the present embodiment is an iron type golf club. This golf club is basically composed of a metal head body 1 constituting a golf club head and a shaft 2 which is a hollow tube. The shaft 2 is attached to a hosel hole 4 formed in a hosel portion 3 on one side of the head main body 1. FIG. 2 shows a mounting structure of the shaft 2. In this embodiment, the diameter of the tip of the shaft 2 is 9.4 mmφ, and the hosel hole 4 has a large-diameter first-stage hole 5 and a small-diameter hole formed at the bottom of the first-stage hole 5. The hole 5 of the first stage is 0.1 mm larger than the diameter of the tip of the shaft 2.
It is formed with a diameter of 9.5 mmφ and a depth of 29 mm. The second-stage hole 6 is formed to have a diameter of 5 mmφ smaller than the first-stage hole 5 and a depth of 5 mm. The second-stage hole 6 accommodates a weight 7 for weight adjustment. The weight 7 for adjusting the weight is
Tungsten alloy made by sintering method (specific gravity 17-18
gcm ³ ), and has a short columnar shape having a diameter and a height just fit in the hole 6 of the second stage, and a through hole 8 is formed on the side surface as necessary as shown in FIG. By adjusting the size of 8, 4 g, 3.5 with the same outer shape
A plurality of weights 7 having different weights, such as g, 3 g,. In FIG. 1 and FIG. 2, reference numeral 10 denotes a ferrule.

[0010] Such a golf club can be manufactured as follows. That is, first, when the head main body 1 is manufactured by forging or the like, the difference between the weight of the head main body 1 and the standard weight is calculated to determine the weight to be adjusted, and the weight 7 having the closest weight is selected. The weight of the head main body 1 is adjusted by installing the weight 7 in the second hole 6 of the hosel hole 4, and then the tip of the shaft 2 and the inside of the first hole 5 of the hosel hole 4 are adjusted. By applying the adhesive 9 and mounting the shaft 2 in the hole 5 of the first stage, a golf club with a precise center of gravity and a good balance can be assembled. At this time, it is preferable that the head main body 1 is set in advance so as to be finished lighter than the standard weight. If the difference from the standard weight is less than 0.5 g, a weight 7
May be omitted, or a lightweight weight 7 made of a material having a low specific gravity such as plastic may be separately prepared and stored.

As described above, the golf club of the above embodiment has the shaft 2 attached to the hosel hole 4 opened on one side of the head body 1, and the hosel hole 4 is the first from the opening side. It consists of a hole 5 at the stage and a hole 6 at the second stage,
The shaft 2 is mounted in the hole 5 of the first stage and the weight 7 for adjusting the weight is installed in the hole 6 of the second stage. After the adjustment weight 7 is inserted, the balance of the golf club can be adjusted simply by attaching the shaft 2 to the first-stage hole. In addition, since the weight 7 for weight adjustment is disposed on the head body 1 side, which is the lowest portion of the hosel hole 4, there is an effect that the center of gravity of the golf club is not disturbed and the weight balance is improved. In addition, since no powder is used unlike the conventional case, no noise is generated, and further, it is not necessary to allow the adhesive to be present above the upper end of the shaft hole in the hollow portion of the shaft 2, so that the shaft strength is reduced. Is not to be reduced.

The head body 1 constituting the golf club head of the present invention can have a tolerance within 0.5 g with respect to the standard weight by setting the weight 7 to various weights in 0.5 g units. It is possible to mass-produce the golf club head (head main body 1) closer to the standard weight than before. Particularly, in this embodiment, since the weight of the weight 7 is adjusted by forming the through hole 8 in the weight 7, it is possible to prepare various weights of the weight 7 having the same outer shape. By making the weight 7 correspond to the diameter and the depth of the hole 6 in the second stage, the weight 7 is firmly fixed and rattling does not occur.

Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiment, and various modifications can be made within the spirit of the present invention. . For example, in the above-described embodiment, the second-stage hole 6 is circular and the weight 7 has a short columnar shape. However, the second-stage hole 6 may be square and the weight 7 may have a cubic shape. Further, the first-stage hole 5 may be provided with a thread, and a thread may be formed at the tip of the shaft 2 to fix the shaft 2 by screwing. In the above embodiment, the first-stage hole 5 is formed larger in diameter and the second-stage hole 6 is formed smaller in diameter. However, both holes may be formed in the same diameter. The place where the weight 7 is installed is the second-stage hole 6, and the place where the shaft 2 is inserted and fixed is the first-stage hole 5.
What is necessary is just to distinguish. Furthermore, in the above-described embodiment, the weight of the weight 7 was adjusted in units of 0.5 g. However, for example, weights having different weights of 0.3 g may be prepared. In this case, finer weights may be prepared in accordance with the difference. Weight adjustment can be made possible. It is needless to say that the present invention is not limited to iron type golf clubs, but can be applied to various golf clubs that perform weight adjustment such as metal wood and wooden wood.

[0014]

According to the golf club of the first aspect of the present invention, a shaft is attached to a hosel hole opened on one side of the head body, and the hosel hole is located at the first stage from the opening side. A first hole and a second stage hole.
Since the shaft is attached to the hole of the second stage and the weight for weight adjustment is installed in the hole of the second stage, after the weight for weight adjustment is put in the hole of the second stage,
The balance of the golf club can be adjusted only by attaching the shaft to the first hole. In addition, since the weight for weight adjustment is disposed at the bottom of the hosel hole, the center of gravity of the golf club is good. In addition, since no powder is used, there is no danger of noise, and furthermore, there is no need for the adhesive to be present above the upper end of the shaft hole in the cavity of the shaft, so that the strength of the shaft may be reduced. Absent.

A golf club head according to a second aspect of the present invention comprises a head body having a hosel hole on one side, wherein the hosel hole has a first stage hole and a second stage hole from the opening side. A shaft is mounted in the first-stage hole, and a weight for weight adjustment is installed in the second-stage hole.
Since the weight is less than 5 g, it is possible to mass-produce golf club heads closer to the standard weight than the conventional one by preparing weights for weight adjustment in units of 0.5 g or less.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a golf club according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a mounting structure of a shaft in the embodiment.

FIG. 3 is a perspective view showing a weight for weight adjustment.

FIG. 4 is a cross-sectional view showing a conventional shaft mounting structure.

FIG. 5 is a sectional view showing another conventional shaft mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head main body (golf club head) 2 Shaft 4 Hosel hole 5 First-stage hole 6 Second-stage hole 7 Weight for weight adjustment

Claims (2)

[Claims] 1. A golf club having a shaft attached to a hosel hole opened on one side of a head body, wherein the hosel hole comprises a first-stage hole and a second-stage hole from the opening side, A golf club, wherein a shaft is mounted in the first hole and a weight for weight adjustment is provided in the second hole. 2. A golf club head comprising a head body having a hosel hole on one side, wherein the hosel hole comprises a first-stage hole and a second-stage hole from an opening side,
A shaft is mounted in the hole of the first stage and a second
A golf club head, wherein a weight for weight adjustment is provided in the hole of the step, and a tolerance to a standard weight is within 0.5 g.