JP2004057597A - Golf club - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club, having a large sweet spot and excellent feeling of hitting a ball. <P>SOLUTION: In this golf club, the club face 2 of the so-called cavity iron having the back engraved deeply is formed 1.0 to 3.5 mm thick, and a balance adjusting mass body 3 formed by a member having a specific gravity two or more times as large as that of the club face member is disposed in the central area of the back of the club face 2. The balance adjusting mass body 3 made of tungsten with a specific gravity of 19.2 is removably screwed on the back of the club face 2 of the club head body 1 made of a Ti-alloy (α-β alloy) of Ti-6%Al-4%V, which is mainly composed of Ti with a specific gravity of 4.5. The club face 2 in the periphery of the balance adjusting mass body 3 is formed uniform in thickness. The tensile strength at yield of the club face 2 is 950 to 1350 MPa. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a golf club.
[0002]
[Prior art]
In recent years, a so-called cavity iron golf club 100X in which the back surface of the club face 2 as shown in FIG. 4B is deeply dug has appeared, which is called a conventional flat back as shown in FIG. It is well received by saying that the sweet spot is wider than the golf club 100Y where the back surface is not dug.
[0003]
However, the sweet spot has expanded by relatively increasing the mass around the club face 2, but the club face 2 does not appear as a substitute for hitting the ball anywhere on the club face. It was with me.
[0004]
Therefore, in order to improve the feel at impact, golf clubs 100X (1-4) in which the sweet spot is narrowed by devising the shape of the back surface of the club face 2 as shown in FIGS. 4 (C) -4 (F). ) Has also been proposed, but no golf club has been provided that is still less prone to miss shots and that has an excellent shot feel and flight distance.
[0005]
[Problems to be solved by the invention]
Therefore, it is necessary to provide a golf club having a wide sweet spot and excellent in feel at impact, which has been a problem to be solved.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems of the prior art, the present invention comprises a member having a club face having a thickness of 1.0 to 3.5 mm and a specific gravity more than twice that of the club face member at the center of the back of the club face A golf club having a first configuration in which a mass body for balance adjustment is disposed;
[0007]
In the golf club of the first configuration, the golf club of the second configuration in which the club face around the balance adjusting mass body is formed to have a uniform thickness;
[0008]
In the golf club having the first or second configuration, a golf club having a third configuration in which a balance adjusting mass body is detachably provided.
[0009]
In the golf club of any one of the first to third configurations, the golf club of the fourth configuration in which the tensile strength of the club face is 950 to 1350 MPa,
Is to provide.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. In order to facilitate understanding, in these drawings, parts having the same functions as those described with reference to FIG.
[0011]
The golf club 100 of the present invention shown in FIGS. 1 to 3 is also a so-called cavity iron in which the back surface of the club face 2 is deeply dug, and mainly contains Ti having a specific gravity of 4.5, for example, Ti-6% On the back surface of the club face 2 of the club head body 1 made of an Al-4% V Ti alloy (α-β alloy), for example, a tungsten balance adjusting mass 3 having a large specific gravity of 19.2 is removably screwed. It is worn.
[0012]
The club head main body 1 made of a Ti alloy is formed to a uniform thinness of 2.0 mm excluding the contour portion of the club face 2. The tensile strength of the club face 2 is increased to, for example, 1170 MPa by a solution aging treatment or the like.
[0013]
Further, the balance adjusting mass 3 made of tungsten having a specific gravity of 19.2 is a central rear surface of the sweet spot (also called a sweet area because of its wide area) 4 when the balance adjusting mass 3 is not attached. It is screwed on.
[0014]
In the golf club 100 of the present invention, the mass per unit area of the club face 2 is a portion where the balance adjusting mass 3 is screwed, and a portion where the balance adjusting mass 3 is not screwed. 10 times or more. The balance adjusting mass body 3 is provided in a size that occupies 10% of the total mass of the club head main body 1 including the balance adjusting mass body 3.
[0015]
Therefore, the sweet spot 5 of the club head main body 1 to which the balance adjusting mass 3 is screwed is narrower than the sweet spot 4 when the balance adjusting mass 3 is not screwed.
[0016]
That is, in the golf club 100 of the present invention configured as described above, since the sweet spot 5 is narrower than the sweet spot 4 of the conventional golf club 100X, when the golf ball 200 hits the sweet spot 5, the ball is centered. There is a certain response that it was captured in, and when the sweet spot 5 is removed, it can be recognized that it was a miss shot, and the quality of the shot can be clearly seen for each shot, so the improvement is quick.
[0017]
Further, in the golf club 100 of the present invention configured as described above, when the golf ball 200 is hit in the right direction from the left side of the drawing as shown in FIG. 3A, the tensile strength is as large as 1170 MPa, but the contour and balance adjustment The club face 2 having a thin thickness of 2.0 mm, excluding the threaded portion 3 for use, is bent to a relatively large extent on the left side of the drawing, and the bending instantaneously returns to the original state due to the high tensile strength of the club face material. Since the deformation speed is added to the speed of the club head body 1, a very large force acts on the golf ball 200 at the time of impact.
[0018]
In addition, the club face 2 comes into contact with the golf ball 200 (the club face 2) while the deflection is relatively large at the left side of the drawing at the beginning, and the bending returns to the original due to the high tensile strength of the material and further to the right side of the drawing by the reaction. The time during which the golf ball 200 is in contact with the golf ball 200 also depends on the swing speed). During that time, force continues to act on the golf ball 200, that is, the impulse continues to increase, increasing the momentum of the golf ball 200. The flight distance is greatly extended.
[0019]
On the other hand, in the conventional golf club 100X made of stainless steel having a low tensile strength, in which the club face 2 is as thick as about 3.0 to 5.0 mm and does not have the balance adjusting mass body 3, the sweet spot 4 is wide. If a golfer of a certain level or more is used, there is a feature that it is difficult to make a miss shot, but the sweet spot 4 is too wide and it is difficult to understand whether the shot is good or bad, and a golf ball as shown in FIG. The club face 2 has a small deflection when hitting 200, and the deformation speed when the deflection returns to the original is small. Therefore, even if the deformation speed is added to the speed of the club head body 1, the force acting on the golf ball 200 Is not particularly large, and therefore the effect of increasing the initial velocity of the golf ball 200 is small, and the flight distance is Etc. there is a drawback that said that does not extend.
[0020]
In order to increase the impulse acting on the golf ball 200 from the club face 2 at the time of impact, the tensile strength of the club face 2 needs to be 950 to 1350 MPa and is formed in a thin thickness of 1.0 to 3.5 mm. There is a need to.
[0021]
In other words, if the thickness of the club face 2 is less than 1.0 mm, even if the tensile strength exceeds 1350 MPa, the repulsive force at the time of impact is insufficient and it is difficult to sufficiently increase the initial velocity of the golf ball 200. Further, when the thickness of the club face 2 exceeds 3.5 mm, even if the tensile strength is 950 MPa or less, the club face 2 can give the golf ball 200 from the club face 2 at the time of impact so that the required initial speed can be obtained. Since the face 2 cannot be deformed, the tensile strength of the club face 2 needs to be 950 to 1350 MPa as described above, and needs to be formed to a thin thickness of 1.0 to 3.5 mm.
[0022]
In addition, the balance adjusting mass 3 is made of a material that is at least twice the specific gravity of the club face 2 and preferably more than three times in order to effectively narrow the sweet spot 4 that has spread too much to the required size. To do.
[0023]
It is also possible to prepare a plurality of balance adjustment mass bodies 3 having different shapes and masses, and select and attach the optimum balance adjustment mass body 3 to each golfer by trial hitting. is there.
[0024]
Then, the selected balance adjusting mass body 3 may be fixed by caulking, pressure welding, adhesion, welding (electron beam welding, laser welding, TIG welding), brazing, or the like so as not to be easily removed. It is also possible to configure the apparatus so that it is appropriately selected and used according to the condition of the day.
[0025]
【The invention's effect】
As described above, in the present invention, the balance face is formed of a member having a club face having a thickness of 1.0 to 3.5 mm and having a specific gravity more than twice that of the club face member at the center of the back surface of the club face. Since the golf club has a body, and the club face around the balance adjusting mass body is formed with a uniform thickness, the balance adjusting mass body is provided around the periphery. When the sweet spot shrinks and you swing a good swing and hit the golf ball at the sweet spot, there is a solid response that caught the ball with the true core, and when you remove the sweet spot you can realize that it was a miss shot, Since you can clearly see the quality of each shot, you can improve quickly.
[0026]
In addition, in a golf club in which the club face around the balance adjusting mass body is formed to have a uniform thickness, the club face deforms relatively easily during impact. Therefore, the impulse acting on the golf ball from the club face is likely to increase, and it becomes easy to obtain a large initial speed and increase the flight distance.
[0027]
In addition, in a golf club in which a balance adjustment mass body is detachably provided, a plurality of balance adjustment mass bodies having different sizes, shapes, and total masses are prepared so that they can be replaced at the time of purchase and tested. By doing so, an optimal balance adjusting mass body can be selected for each golfer.
[0028]
Further, in a golf club having a club face with a tensile strength of 950 to 1350 MPa, the club head can be made to have a strong repulsive force even if the club head is reduced in weight. It is possible to increase the distance. Also, by making the club head lighter, it is easier to swing it out and the balance is less likely to be lost during the swing.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a golf club of the present invention.
FIG. 2 is a cross-sectional explanatory view of a golf club of the present invention.
3A and 3B are explanatory views at the time of impact; FIG. 3A is an explanatory view in the case of a golf club of the present invention, and FIG. 3B is an explanatory view in the case of a conventional golf club.
FIG. 4 is an explanatory view of a conventional golf club.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Club head main body 2 Club face 3 Mass body 4 for balance adjustment, 5 Sweet spot 100, 100X, 100Y Golf club 200 Golf ball

Claims (4)

The club face is formed with a thickness of 1.0 to 3.5 mm, and a balance adjusting mass body made of a member having a specific gravity more than twice that of the club face member is disposed at the center of the back of the club face. And a golf club. 2. The golf club according to claim 1, wherein the club face around the balance adjusting mass is formed to have a uniform thickness. 3. The golf club according to claim 1, wherein the balance adjusting mass body is detachably provided. The golf club according to claim 1, wherein the club face has a tensile strength of 950 to 1350 MPa.

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