JPH08257181A - Golf club head - Google Patents

Abstract

PURPOSE: To provide a golf club head capable of accurately adjusting the weight balance or the like of the head. CONSTITUTION: First to fourth weights 11, 14, 16 and 18 made of a material having the specific gravity larger than that of a head body 3 are disposed around the rear surface 3A. The first and second weights 11, 14 are made of a beryllium copper alloy and the third and fourth weights 16, 18 are made of tungsten. Thus, the weight balance of the head is dispersed, and a sweet area can be expanded. The correction of hook and slice ball can be carried out by the third and fourth weights 16, 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to golf club heads such as irons, sand wedges and pitching wedges.

[0002]

2. Description of the Related Art Conventionally, as this type, Japanese Patent Laid-Open No. 6-8
In FIG. 6 of Japanese Patent No. 6843, a groove is formed on the back surface of the head main body made of steel, and one additional weight is provided in this groove, and various weights are given by this additional weight to meet the demands of each player. What is made to respond is disclosed.

[0003]

In the prior art,
Even if the weight balance of the head is adjusted by one additional weight or the sweet area is expanded due to the low center of gravity of the head, the additional weight cannot accurately adjust the weight balance of the head. was there.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems and to provide a golf club head capable of accurately adjusting the weight balance of the head according to the demand of each player.

[0005]

According to the present invention, a lower weight made of a material having a larger specific gravity than the head main body is provided on the lower rear surface of the head main body having a hosel on the negative side, and at least the back surface of the head main body is provided. The golf club head is characterized in that one side portion is provided with a side weight made of a material having a specific gravity different from those of the head body and the lower weight.

[0006]

With the above construction, the lower weight can lower the center of gravity of the head, and the side weight can adjust the moment of inertia of the head, which is useful for correcting sliced balls or hook balls.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. The head body 3 provided with a hosel 2 for connecting the shaft 1 to the shaft side is formed by forging pure titanium (specific gravity: about 4.5) or titanium alloy.
A space 4, a sole 5, a top 6, a heel 7, and a cavity 8 which is a recess are formed in the back surface 3A. The sole 5
The first recess 9 is formed in a rectangular shape, and a horizontally elongated first protrusion 10 is formed in the center of the first recess 9. The first protrusion 10 has an upper width A smaller than a lower width B (A <B) and is formed in a dovetail shape. Similarly, the edge 9A of the first recess 9 is also formed in a dovetail groove shape. The first weight 11, which is a lower weight fitted into the first recess 9, is made of a material having a higher specific gravity than the material of the head body 3, for example, beryllium copper alloy (specific gravity about 8.2) or copper. A first laterally long hole 12 into which the first protrusion 10 is fitted is formed in the center.

A second recess is formed on the upper surface of the back surface 3A.
13 are formed. This second recess 13 is the top 6
To the heel 7 side are formed in a dovetail shape. Then, the second weight 14 fitted in the second recess 13
Is made of a material having a higher specific gravity than the material of the head body 3, for example, beryllium copper alloy (specific gravity about 8.2) or copper. Further, a third weight 16 which is a side weight is fixed by adhesion to a third concave portion 15 formed in a vertically long shape from the top 6 to the sole 5 on the back surface 3A. The third weight 16 is formed such that the lower width C is larger than the upper width D (C> D).
A material larger than the specific gravity of the second and third weights 14 and 16 disposed above and below A, for example, tungsten (specific gravity 19.
3) Alternatively, a tungsten alloy is used. Also, the back surface 3
A fourth concave portion 17 is formed on the heel 7 side of A, and a side made of a material larger than the specific gravity of the second and third weights 14 and 16, for example, tungsten (specific gravity 19.3) or a tungsten alloy. 4th weight which is weight
18 is provided by adhesion.

In the embodiment, specifically, the head body 3 is 160 g, the first weight 11 is 50 g, and the second weight is 50 g.
14 is 10 g, the third weight 16 is about 20 g, and the fourth weight 18 is about 10 g. The weight ratio is such that the total weight of the head, the total weight of the first and second weights 11 and 14, and the total weight of the third and fourth weights 16 and 18 are 250: 40 to 80:10 to 50. Further, the weight of the first weight 11 is formed to be heavier than the weight of the second weight 14. Also, the third weight 16 and the fourth weight
In the embodiment, the weight 18 of the third weight 16 is increased, but the weight of the fourth weight 18 is kept almost the same and the weight of the third weight 16 is decreased.
The weight 16 may be lighter than the fourth weight 18.

Next, the function and effect of the above configuration will be described. In the embodiment, the weight balance of the head is dispersed by disposing the first to fourth weights 11, 14, 16, 18 made of a material having a larger specific gravity than the head body 3 around the back surface 3A. It is possible to expand the sweet area. In addition, the sole 5 has a relatively heavy first
Of the third weight 16 and the lower width C of the third weight 16 is made larger than the upper width D of the third weight 16 so that the third weight 16 itself has a low center of gravity structure. The center of gravity can be achieved and the sweet area can be further expanded.

Moreover, in the above embodiment, the third weight 16 is used.
When comparing the fourth weight 18 with the third weight 16, the weight of the third weight 16 is large. Therefore, when shot as shown in FIG. 6, the moment of inertia of the top 6 side around the center of gravity G becomes large, and as a result, the shot Sometimes the top 6 side of the head wraps around, which makes the golf ball prone to hookballs, thus helping to correct players with slicing habits. Conversely, the fourth weight 18
Is approximately the size shown in the drawing, and the third weight 16 is made smaller than that shown in the drawing so that the fourth weight 18
When it is heavier than the weight 16, the head tends to be a slice ball, and thus can be useful for correcting a player having a hook habit.

Further, since the first and second weights 11 and 14 are fixed to the first recess 9 and the second recess 13 by the dovetail joint, the connection strength can be improved.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in addition to the sole of the head body, a weight may be provided on either the top or the heel.
The second weight may be formed of a material having a larger specific gravity than the third and fourth weights. For example, the first and second weights may be tungsten or a tungsten alloy, and the third and fourth weights may be beryllium copper alloys. Further, the third and fourth weights may be fixed to the third and fourth recesses by dovetail groove coupling. In this case, strong fixation becomes possible.

[0014]

According to the present invention, a lower weight made of a material having a larger specific gravity than that of the head body is provided on the lower portion of the back surface of the head body having a hosel on the negative side, and at least one side portion of the back surface of the head body is provided. A golf club head characterized in that a side weight made of a material having a specific gravity different from that of the material of the head body and the material of the lower weight is provided in the golf club head, and the sweet area can be enlarged by lowering the center of gravity of the head. , The moment of inertia of the head can be adjusted, which can be useful for straightening sliced balls or hook balls.

[Brief description of drawings]

FIG. 1 is a rear view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG. 1 showing an embodiment of the present invention.

3 is a sectional view taken along line YY of FIG. 1 showing an embodiment of the present invention.

FIG. 4 is a sectional view taken along line ZZ of FIG. 1 showing an embodiment of the present invention.

FIG. 5 is a front view showing an embodiment of the present invention.

FIG. 6 is a plan sectional view showing an embodiment of the present invention.

FIG. 7 is a bottom view showing an embodiment of the present invention.

[Explanation of symbols]

 3 Head Main Body 3A Rear Surface 11 First Weight (Lower Weight) 16 Third Weight (Side Weight) 18 Fourth Weight (Side Weight)

Claims (1)

[Claims] 1. A lower weight made of a material having a larger specific gravity than that of the head body is provided at a lower portion of the back surface of the head body having a hosel provided on the negative side, and the head body is provided on at least one side portion of the back surface of the head body. A golf club head having side weights made of a material having a specific gravity different from that of the above-mentioned material and the material of the lower weight.