JPH11299940A - Iron club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make full use of the soft feeling natural to titanium by integrally fixing a copper alloy-made member having a specified weight composition ratio of Pb, Sn, Ni, and Cu and a specified specific gravity to a titanium head body. SOLUTION: The weight composition of a plate copper alloy-made member 1 is set to 14.0-18.0% Pb, 6.0-10.0% Sn, 0.4-1.0% Ni, and the remainder of Cu, and the specific gravity is set to 9.0-9.5 A plate-like recessed part is formed on the back surface 3 of a titanium head body constituting the essential part of an iron club head, and the plate copper alloy-made member 1 has an outer form corresponding to the inside circumferential surface form of the plate-like recessed part of the back surface 3 of the head body. The copper alloy-made member 1 is fitted to the plate-like recessed part, and integrally fixed to the head body by adhesion or crushing plastic deformation. The weight ratio of the copper alloy-made member 1 to the whole head is set to 45.0-55.0%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an iron club head.

[0002]

2. Description of the Related Art Conventionally, an iron club head made of titanium or a titanium alloy is too large if made of a single material, so that in order to reduce the size of the iron club head, the specific gravity is sufficiently larger than that of titanium or a titanium alloy. In addition, alloys such as brass, tungsten, and copper-tungsten have been combined with a golf club iron head body made of titanium or a titanium alloy.

[0003]

However, with the conventional (as described above) composite iron club head, the shot feeling is very hard, and the original soft feeling of titanium at the time of hitting cannot be utilized. Then, an object of the present invention is to provide an iron club head which can make use of the original soft feeling of titanium.

[0004]

In order to solve the above-mentioned object, an iron club head according to the present invention has a weight composition of 14.0 to 18.0% Pb, 6.0 to 10.0% Sn, 0.4 to 1.0%.
A copper alloy member having a specific gravity of 9.0 to 9.5, comprising Ni and the balance Cu, is integrally fixed to a titanium-based head main body.

[0005] A plate-shaped copper alloy member is integrally fixed to the back surface of the head body. Further, a member made of a copper alloy is integrally fixed to the sole surface side of the head body. Further, a copper alloy member is integrally fixed to the back surface and the sole surface side of the head main body, respectively.
The weight ratio of copper alloy members to the entire head is 45.0 to 5
It is 5.0%. The thickness of the face portion of the head body is set to 2.0 to 3.0 mm, and the thickness of the plate-shaped copper alloy member is set to 3.0 to 6.0 mm.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

FIG. 1 shows a copper alloy member 1. This copper alloy member 1 is plate-shaped, and its weight composition is 14.0 to 18.0.
% Pb, 6.0-10.0% Sn, 0.4-1.0% Ni, balance C
u, having a specific gravity of 9.0 to 9.5. However, some other element may be included. FIG. 2 shows a titanium-based head main body 2 constituting a main part of the iron club head,
On the back surface 3 of the head main body 2, a shallow dish-shaped recess is formed. Note that titanium-based refers to pure titanium or titanium containing a small amount of other elements, or a titanium alloy.

The plate-shaped copper alloy member 1 has an outer shape corresponding to the inner peripheral shape of the shallow dish-shaped recess on the back surface 3 of the head body 2. And fixed integrally to the head body 2 by bonding or crushing plastic deformation. FIG. 3 shows a longitudinal section (of the finished product) after such a fixation. The weight ratio P of the copper alloy member 1 to the entire head is set to 45.0 to 55.0%. That is, if the weight ratio P is less than 45.0%, the volume of the entire head becomes too large (to make the entire head necessary weight), and if it exceeds 55.0%, the shot feeling becomes hard.

Further, in FIG. 3, the thickness t of the face portion of the head main body 2 is set to 2.0 to 3.0 mm. The thickness s of the plate-shaped copper alloy member 1 is set to 3.0 to 6.0 mm. If the thicknesses t and s are out of the range, there is a problem that the strength is insufficient or the weight (volume) is excessive, and the combination of the thicknesses t and s in such a range provides the best shot feeling. can get.

FIG. 4 shows a second embodiment. The copper alloy member 1 is provided with a concave portion 5 provided on the sole surface 4 of the head body.
(Block-shaped or plate-shaped) corresponding to
It is integrally fixed to the recess 5 by press fitting or the like (an adhesive may be used together). FIG. 5 shows a third embodiment. The copper alloy member 1 is integrally fixed to the back surface 3 of the head body 2 and the recess 5 of the sole surface 4 respectively.

[0011]

EXAMPLE Next, the iron club head described with reference to FIGS. 1 to 3 was manufactured as Example 1 of the present invention. At that time, the iron club head body material was manufactured by pure titanium hot forging, and the milling process was applied to the back surface of the iron club head.
5g iron head body of pure titanium single material (g) (2)
Was prepared. Then, a plate-shaped copper alloy member 1 as shown in FIG. 1 having a weight of 120 g was prepared and fixed in a shallow dish-shaped recess on the back surface 3 in a fitting manner. The weight composition of the copper alloy member 1 of Example 1 was 16.0% Pb, 8.0% Sn, 0.7%.
% Ni, the balance being Cu, specific gravity of 9.5, and (Vickers) hardness of 120 Hv were used.

As Comparative Examples 1, 2, and 3, FIG.
As shown in FIGS. 7 and 8, a head body 12 having the same material, shape, and dimensions as those of the first embodiment (FIG. 2) is used. The materials (specific gravity, hardness) shown in the following Table 1 were used.
In order to make the area of contact (adhesion) with the recess (bottom) of the back surface 13 of the head body 12 made of pure titanium the same,
8, the thickness u was increased or decreased (in inverse proportion to the specific gravity), and the weight of each plate member 6, 7, 8 was set to 120 g (constant).

[0013]

[Table 1]

Each of the iron club heads of Example 1 (FIG. 3), Comparative Example 1 (FIG. 6), Comparative Example 2 (FIG. 7), and Comparative Example 3 (FIG. 8) was provided with a shaft and a grip having the same specifications. The attached iron golf clubs A, B, C and D were produced. An actual hit test of hit feeling was performed by five testers. The results are shown in Table 2 below. The rating was based on a five-point questionnaire system. The softer the shot feeling, the higher the score.

[0015]

[Table 2]

From Table 2 above, it can be seen that the iron club head (iron golf club A) of Example 1 of the present invention clearly has a good shot feeling (soft feeling).

[0017]

Since the present invention is configured as described above, the following effects can be obtained.

[0018] According to the first, second, third or fourth aspect, it is possible to soften the shot feeling when hitting a golf ball. (According to claim 2 or 4) Since the plate-shaped copper alloy member 1 is fixed to the back surface {back surface 3} of the face surface in direct contact with the golf ball, the shot feeling is further improved. obtain. Thus, the original soft feeling of titanium, which is the material of the head main body 2, can be fully utilized. (According to claim 5), a good shot feeling can be obtained while keeping the volume of the entire head small. According to the sixth aspect, the most excellent shot feeling can be obtained while sufficiently maintaining the strength.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a copper alloy member.

FIG. 2 is a perspective view showing the head main body as viewed from the rear side.

FIG. 3 is a sectional view showing one embodiment of the present invention.

FIG. 4 is a cross-sectional view showing another embodiment of the present invention.

FIG. 5 is a sectional view showing another embodiment of the present invention.

FIG. 6 is a sectional view showing Comparative Example 1.

FIG. 7 is a cross-sectional view showing Comparative Example 2.

FIG. 8 is a cross-sectional view showing Comparative Example 3.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Copper alloy member 2 Head body 3 Back 4 Sole surface

Claims (6)

[Claims] (1) a weight composition of 14.0-18.0% Pb, 6.0-1
The specific gravity of 0.0% Sn, 0.4-1.0% Ni, and the balance Cu
An iron club head comprising 9.0 to 9.5 copper alloy member 1 integrally fixed to a titanium-based head body 2. 2. The iron club head according to claim 1, wherein a plate-shaped copper alloy member is integrally fixed to the back surface of the head body. 3. The iron club head according to claim 1, wherein the copper alloy member is integrally fixed to the sole surface of the head body. 4. The iron club head according to claim 1, wherein the copper alloy member 1 is integrally fixed to the back surface 3 and the sole surface 4 of the head main body 2, respectively. 5. The iron club head according to claim 1, wherein the weight ratio of the copper alloy member 1 to the entire head is 45.0 to 55.0%. 6. The head body 2 has a face thickness of 2.0 to 2.0.
Set the thickness to 3.0 mm and set the thickness of the plate-shaped copper alloy
The iron club head according to claim 2 or 4, wherein the iron club head is set to 3.0 to 6.0 mm.