JPS6131178A - Golf club - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to improvements in golf clubs.

The golf club is extremely important to the game of golf.

And it is also extremely personal.

No matter how good a golf club is, it will be completely meaningless if it does not match the skill and physical strength of the user.

Especially the feeling when you swing a golf club, which is important.
It is said that it is heavy or light, or that it swings comfortably.

This is roughly determined by three factors: the golf club's head weight, shaft weight, and shaft rigidity, but with conventional golf clubs, these three factors
Performance or individuality was determined by how the two elements were configured.

However, once a golf club has been decided on, it has fixed and unchangeable performance and individuality, and while this is attractive to golfers, if it does not suit your technique and physical strength, no matter how much you practice, you will not be able to improve. It was something I wouldn't do.

Especially for golfers with intermediate skills, it is said that if you want to improve your golf skills, you should use the golf club that is most suitable for you before practicing. It's important.

The present invention improves the conventional golf club described above, and the three elements of the conventional golf club, head weight, shaft weight, and shaft rigidity, have their own values after the design and manufacture stage and cannot be easily changed. However, by making the shaft rigidity of the three elements variable, it is possible to variably adjust the degree of bending of the golf club, that is, the unique frequency, which is determined by the head weight, shaft weight, and shaft rigidity. The aim is to give a single golf club a variety of characteristics and performance, to make the head fully demonstrate its performance, and to obtain sufficient head speed.

Briefly stated below, in the hollow shaft of a golf club, a high-tensile wire is passed between the head side and the grip side inside the hollow shaft, and one end of the high-tensile wire is concentric with the axis of the shaft. It is fixed to the shaft member on the head side or the head member, and the other end is attached to the shaft member on the grip side concentrically with the axis via a screw member that is adjustable and movable in the axial direction of the shaft.

Based on the above configuration, by adjusting the adjustable screw member on the grip side in the axial direction of the shaft, a tensile force can be applied to the high tensile strength wire material and the tensile force can be adjusted. In particular, the golf club is capable of adjusting the hardness of the shaft represented by bending by changing the compressive stress applied to the shaft. This takes advantage of the fact that adding 20% to the surface reduces rigidity and makes it easier to bend.

Examples will be explained in detail below.

The embodiment shown in FIG. 1 is a so-called wood club, in which the tip of a hollow shaft 1 is inserted from the neck of the head 2 toward the heel, and is stopped by a head fixing pin 3 to prevent it from coming out. There is.

Near the other end is a grip portion, and a grip 8 is provided around the hollow shaft 1.

A piano wire 5 as a high-tensile wire is passed through the hollow shaft 1, and one end of the piano wire 5 is wound and fixed around a head fixing pin 3.

The other end of the hollow shaft 1 is connected to an adjusting nut 7 for attaching a piano wire, which is located concentrically with the shaft 1 in the end where the grip 8 is provided.
It is fixed via a piano wire fixing pin 10.

The fixing pin 10 has a nut 7 facing inside the shaft 1.
The pin 10 is provided inside the nut 7 near the end thereof so as to pass through the nut 7 in the diametrical direction, and both ends of the pin 10 are fixed to the nut 7 by being hooked or the like.

The end of the piano wire 5 is connected to the pin 1 in the same way as the head side.
It is fixed by wrapping it around 0.

Further, an adjustment bolt 6 is screwed into the nut 7, and the head portion of the adjustment bolt 6 is extended beyond the end of the hollow shaft 1 so that adjustment can be made from the outside.

Further, a washer 9 having a flange that can hang over the end of the hollow shaft 1 is provided between the adjustment nut 7 for piano wire attachment and the adjustment bolt 6 to prevent the adjustment bolt 6 from sinking into the inside of the hollow shaft 1. At the same time, the stress applied to the adjusting bolt 6 is transmitted to the shaft 1 via the washer 9.

Furthermore, in the adjustment nut 7 for attaching the piano wire, two elongated holes parallel to the axial direction are provided at positions 180° from the axis center in a part closer to the center than the position where the piano wire fixing pin 10 is provided. It is called Annai ditch 12.

A rotation prevention pin 11 is provided to pass through the pin inner groove 12 so that the pin 11 can move freely according to the inner groove 12, and both ends of the pin 11 are connected to the hollow shaft 1. Secure by clipping etc.

In this way, the nut 7 does not rotate together with the bolt 6, and therefore only tensile stress can be applied to the piano wire 5 without any torsional torque acting on it.

Although the explanation has been mixed, in addition to the hollow metal shaft, the shaft member 1 uses a so-called carbon shaft made of carbon fiber material as a new material, but in the present invention, the carbon shaft has the same effect as the metal shaft. is obtained.

Furthermore, in this example, piano wire is used as the high-tensile wire material, but carbon fiber material or Kevlar (trade name of DuPont), etc., may be used as a metal material or new material that has the same or higher tensile strength. However, the same effect can be obtained.

The embodiment shown in FIG. 2 is a so-called iron club, and shows a method of fixing the piano wire at the head side end of the hollow shaft 1.

Clubs with heads made of iron-based materials, such as sand wedges from the first iron, and putters, do not use pins to secure the shaft and head like wood heads, so there is a piano in the center of the member. A washer 14 having a small hole through which the wire is passed and a collar that extends over the end of the hollow shaft 1 is attached to the head side end of the hollow shaft 1, and the piano wire 5 is passed through the small hole of the washer 14. By forming a head larger than the small hole diameter of the washer 14 at the end of the piano wire 5, the piano wire 5 is fixed to the head side portion of the shaft 1 so as not to slip out.

The embodiment shown in FIG. 3 is a so-called metal wood club, which is made of a material different from that of a conventional wooden head.

Unlike a wooden head, it does not have a pin for fixing the head, so the way to fix the end of the piano wire on the head side is to fix the end of the piano wire on the heel part of the head 17, which is an extension of the shaft 1, so that it is concentric with the axis of the shaft 1. Washer mounting hole 13
A piano wire 5, which is a tension member, is provided at the center of the hole 13.
Provide a small hole suitable for

In the washer mounting hole 13, a piano wire 5 is placed in the center of the member.
By inserting a washer 15 having a small hole to pass through, passing the piano wire 5 through the small hole of the washer 15, and making a head larger than the small hole of the washer 15 at the end of the piano wire 5. The piano wire 5 is fixed through the head member itself so that the piano wire 5 does not come out.

The method of fixing the piano wire as a high-tensile wire material as in this embodiment can be applied to a conventional wooden wooden head, a head made of a new material such as carbon fiber material, ceramics, or FRP, or a club with an iron head. is also possible.

Further, in this embodiment, the piano wire 5 is coated with synthetic resin in order to prevent unnecessary vibration and rust inside the hollow shaft.

As described above, the effects of the present invention have been explained through examples.If tension is applied to the piano wire 5 using the adjustment bolt 6,
As a reaction, a compressive force acts on the shaft member 1.

The compressive force acting on this hollow shaft 1 is
It has the function of reducing the rigidity of the shaft and increasing the deflection of the shaft due to external forces.

Therefore, by adjusting the tensile force applied to the piano wire 5, the way the shaft deflects and the unique frequency of the shaft can be changed as desired.

As a result, by changing the shaft rigidity, the club can be expressed as feeling heavier, lighter, or easier to swing, which is determined by the three elements of head weight, shaft weight, and shaft rigidity. The performance of the club can be varied in a variety of ways, making it possible to produce heavy or light tones with a single club, making it the best golf club that matches the golfer's skill and physical strength.

[Brief explanation of the drawing]

1...Hollow shaft 2...Wood head 3...Head fixing pin 4...Sole metal fitting 5...Piano wire 6...Adjusting bolt 7...Adjusting nut for attaching piano wire 8...Grip 9...Washer 10...Piano wire fixing pin 11...Both rotation prevention pin 12...Pin Anai groove
13... Washer mounting hole 14... Washer 15... Washer 16... Iron head 17... Metal wood head 18... Steady rest FIG. 1... A vertical sectional view showing an embodiment of a wood club. FIG. 2: A partial longitudinal cross-sectional view showing an example of a piano wire fixed to a head-side shaft member of an iron club. FIG. 3: A partial longitudinal sectional view showing an example of a metal wood club in which piano wire is fixed to the head side member. FIG. 4: A partial longitudinal cross-sectional view of the adjustment mechanism provided in the grip-side shaft member in FIG. 1.

Claims (1)

[Claims] 1. In a hollow shaft of a golf club, a high-tensile wire is passed inside the hollow shaft from the head to the grip side, and one end of the high-tensile wire is concentric with the axis of the shaft and is placed on the head side. The other end is attached to the shaft member on the grip side concentrically with the shaft center via a screw member whose other end is adjustable and movable in the axial direction of the shaft. Based on the above configuration, the compressive stress applied to the hollow shaft is changed by adjusting the tensile force applied to the high-tensile wire rod by adjusting the screw member,
This is a golf club that allows the hardness of the shaft to be adjusted. 2. The golf club according to item 1, wherein one end of the high-tensile wire rod is concentric with the axis of the shaft and is attached to the head member.