JPH1015124A - Iron head for golf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To expand the sweet spot of a head and ensure an accurate shot by forming a head body out of a metallic uniform material, and setting the specific gravity thereof within a specific range. SOLUTION: The head body of an iron head for a golf is formed out of a metallic uniform material, so as to have specific gravity within the range of 6.0 to 7.5. Also, iron or a nickel alloy is preferable as the material of the head body, and regarding the composition thereof, iron or a nickel alloy containing at least one or more of C, Si, Mn, Al, Ti, Zr, V and Nb as a specific gravity adjustment element is pertinent. The material should also preferably contain at least one or more kinds of C, Si and Mn equal to or less than 4.0, 4.5 and 2.0 respectively in terms of percentage by weight. Also, as the specific gravity is set within the range of 6.0 to 7.5, the type and the amount of an additive element are adjusted on the basis of the iron.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf iron head. More particularly, the present invention relates to a new golf iron head capable of enlarging the sweet spot of the head, enabling accurate shots, and making swinging easier.

[0002]

2. Description of the Related Art Golf iron heads have long been manufactured from soft iron or stainless steel by forging or casting. This is because soft iron and the like had a shot feeling at impact that was suitable for the golfer's aim. However, in the case of these conventional iron heads, the specific gravity of each material is as large as about 7.8 or more, so that the entire head is reduced in relation to the force required for the swing, and the sweet spot on the face surface is also reduced. However, there is a problem that it is difficult to obtain the direction and distance that the golfer aims, and the probability of obtaining a nice shot is low.

[0003] This is also a cause for a general golfer who cannot take a shot mentally drastically and cannot extend the flight distance further. In order to solve such a problem, it is conceivable to use a lightweight aluminum alloy, titanium alloy, or the like. However, in actuality, the specific gravity of the former is too low at about 2.7, so that a golf iron head becomes huge and practical. It is hard to be a thing. Further, the latter is very difficult to manufacture because it is a titanium alloy, so that it is expensive and has low practicality.

Accordingly, the present invention solves the above-mentioned problems in the prior art, makes the shape of the iron iron larger than that of the conventional soft iron golf head, enlarges the sweet spot of the head, and enables a golfer to make an accurate shot. It is an object of the present invention to provide a new golf iron head that can be easily swinged and can be supplied to a user at a price similar to a conventional one.

[0005]

The present invention solves the above-mentioned problems by assuring that the head body is made of a uniform metal material and has a specific gravity in the range of 6.0 to 7.5. A golf iron head is provided. Further, the present invention provides the iron head, wherein the material is iron or a nickel alloy, and the material has at least one of C, Si, Mn, Al, Ti, Zr, V and Nb in its composition. It is an iron or nickel alloy contained as a specific gravity adjusting element, and the material is C: 4.0 or less, Si: 4.5 or less, and Mn: 2.0 or less by weight as a composition. One of the aspects is that one or more of them are contained.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The essential feature of the present invention is that the iron head is made of a metal having a specific gravity of 6.0 to 7.5 as described above. More specifically, the material is iron or a nickel alloy, and the specific gravity adjusting element and the strength improving element are C, Si, Mn, Al, Ti, Zr, V, and Nb.
Is also characterized by an iron head to which at least one of these is added.

[0007] By using an iron alloy or a nickel alloy,
The price does not increase compared to the past. Of course, the material may be, for example, the above iron or nickel alloy, but any material having a specific gravity in the range of 6.0 to 7.5 and a strength satisfying the conditions required for a golf iron head is used. It is not limited to this. The same applies to the additional elements.

[0008] Therefore, an embodiment will be shown below, and an embodiment of the present invention will be described in more detail.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific gravity of a golf iron head is 6.0 to 6.0.
In order to set the specific gravity to the range of 7.5, the specific gravity is included in the above range by adjusting the type and amount of the additional element based on iron. As a specific example, an iron head was manufactured by precision casting with the composition shown in Table 1 for long irons No. 2 to No. 4 hard to hit by a general golfer among irons.

As a comparative example, an iron head of the same count was manufactured from soft iron. The shape of the iron head was modeled on the basis of a commercially available soft iron iron head, with the face surface thickness fixed, the face surface enlarged, and the center of gravity designed accordingly.

[0011]

[Table 1]

Then, the iron head manufactured by precision casting was mounted on a commercially available shaft to obtain a golf club. Next, in order to confirm the effects of the present invention, 20 golfers were asked to hit about 30 balls each of the manufactured golf clubs, and the flight distance, directionality, and ease of swing were evaluated. The results are shown in Table 2.

As can be seen from Table 2, the flight distance was at the same level, and the directionality and the ease of swing were better than those of the comparative example.

[0014]

[Table 2]

[0015]

As described in detail above, according to the present invention, the sweet spot of the head is enlarged as compared with the conventional golf iron head, enabling a golfer to make accurate shots, easily swing, and at the same price as the conventional one. It can be supplied to users.

Claims (4)

[Claims] 1. An iron head for golf, wherein the head body is made of a uniform metal material and has a specific gravity in a range of 6.0 to 7.5. 2. The golf iron head according to claim 1, wherein the material is iron or a nickel alloy. 3. The material is composed of C, Si,
3. The iron head for golf according to claim 1, wherein the iron or nickel alloy contains at least one of Mn, Al, Ti, Zr, V and Nb as a specific gravity adjusting element. 4. The material contains at least one or more of C, Si and Mn having a composition of C: 4.0 or less, Si: 4.5 or less, and Mn: 2.0 or less by weight percentage. The golf iron head according to claim 3.