JPH0857088A - Golf club head - Google Patents

Abstract

PURPOSE: To provide a golf club head capable of expanding the sweet area. CONSTITUTION: A circular projection 5 is formed at the rear section of a head main body 1 provided with a face 2. A weight 10 formed with at least a sole section 11 is fixed to the outer periphery of the projection 5, and the weight 10 is made of a material having the specific gravity larger than that of the head main body 1. The distance L between the center of gravity G of the head and the face 2 is increased by the specific gravity difference, and the sweet area can be expanded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head such as an iron club.

[0002]

2. Description of the Related Art Conventionally, as this type, Japanese Patent Laid-Open No. 6-8
FIG. 6 of Japanese Patent No. 6843 discloses a golf club head in which a hosel is provided on the negative side of the face, a concave portion is provided in the rear portion of the face, and a weight is provided in the concave portion.

[0003]

In the prior art,
Since the whole is made of the same material such as steel, even if a recess is provided and a weight is provided in this recess, the depth of the center of gravity, which is the distance between the center of gravity of the head and the face, cannot be increased. As a result, the sweet area cannot be expanded.

Therefore, an object of the present invention is to provide a golf club head capable of enlarging the sweet area by increasing the depth of the center of gravity.

[0005]

SUMMARY OF THE INVENTION The present invention is a golf club head having a hosel on the negative side of the face and a concave portion on the rear side of the face, wherein the face is provided and the hosel is provided on the negative side, and A head main body having an annular protrusion on the rear portion of the face; and a weight made of a material larger than the specific gravity of the head main body fixed to the outer peripheral portion of the protrusion and forming at least a sole portion. And a golf club head.

In the present invention, the head body is made of titanium,
The golf club head according to claim 1, wherein the head is made of a titanium alloy, and the weight is made of a beryllium copper alloy.

[0007]

With the above construction, the weight can increase the depth of the center of gravity of the head to enlarge the sweet area.

Further, with the above structure, the difference in specific gravity of the materials can be increased, and the sweet area can be further expanded.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The head body 1 is formed with a hosel 4 for mounting the shaft 3 on the negative side of the face 2. An annular protrusion 5 is formed on the back surface of the face 2. The protrusion 5 has a gap A on the top 6 side that is uniformly larger than a gap B on the heel 7 side. The outer peripheral portion 8 of the face 2 and the outer peripheral portion 9 of the protruding portion 5 are each inclined outward. The head body 1 is made of a material having a small specific gravity such as pure titanium, titanium alloy, and aluminum alloy.

The weight 10 fixed to the outer peripheral portion 9 of the projection 5 has at least a sole 11 portion, and the weight 10 includes an upper portion 12, a sole portion 11, a side portion 13,
The weight is formed in an annular shape including the other side portion 14.
Reference numeral 10 is made of a material having a larger specific gravity than the material of the head body 1, and for example, a copper alloy such as beryllium copper alloy, stainless steel or the like is used. The inside of the weight 10 is press-fitted to the outer peripheral portion 8 and the outer side thereof is press-fitted to the outer peripheral portion 9, and fixed in a dovetail shape. As a combination of the above materials, the head body 1 is made of titanium alloy, weight.
It is desirable to use 10 as a beryllium copper alloy to increase the difference in specific gravity. Further, the edge portions 11A, 12A and 14A of the sole portion 11, the upper portion 12 and the other side portion 14 are provided in the same plane as the face 2.

Next, the function and effect of the above configuration will be described. In the above embodiment, since the head main body 1 is made of a material having a small specific gravity and the weight 10 is made of a material having a large specific gravity provided on the rear portion of the head body 1, the center of gravity G of the head is set to the position of the head. Can be placed in the rear,
As a result, the depth L of the center of gravity can be increased to enlarge the sweet area.

Further, the head body 1 is made of titanium or a titanium alloy, and the weight 10 is made of beryllium copper alloy to make a large difference in specific gravity, thereby causing a large difference in specific gravity, and further increasing the depth L of the center of gravity and further expanding the sweet area. You can Further, by using beryllium copper alloy on the side of the sole portion 11, even if the sole portion 11 hits a stone or the like at the time of shot, it is hard to be scratched, and the head is not scratched. Further, since the edge portion 11A of the sole portion 11 made of beryllium copper alloy is provided in the same plane as the face 2, the face 2 can also be protected at the time of a shot or the like.

Further, since the weight 10 is press-fitted into the outer peripheral portion 8 of the head main body 1 and the outer peripheral portion 9 of the protrusion 5 in the shape of a dovetail groove, the attachment strength thereof can be increased. . Moreover, the edge 11 is formed in three directions of the face 2.
A, 12A, 14A appear, so it is excellent in aesthetics.

FIG. 6 shows a second embodiment of the present invention.
The same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the second embodiment, the protrusion 21 of the head body 22 made of titanium alloy or the like having the annular protrusion 21 is provided such that the inner and outer peripheral portions 23 and 24 are spread rearward. The outer peripheral portion 27 of 26 is also formed so as to expand rearward. The weight 29, which is fixed to the head body 22 and is made of beryllium alloy and is provided with the sole portion 28, has the small protrusions.
A dovetail groove 30 for press-fitting and fitting into the 25 is formed, and further, the upper edge portion 31 and the edge portion 32 of the sole 28 are press-fit into the outer peripheral portion 27 so as to be flush with the face 26 and fitted. ing.

Therefore, in the second embodiment, the head main body 22 made of a material having a small specific gravity and the weight 28 made of a material having a large specific gravity are used to dispose the center of gravity G of the head at the rear portion of the head so that the sweet area is formed. Can be expanded, and the sole part 28 is made of beryllium copper alloy so that it is not easily scratched, and the edge part of the sole part 28
Since 32 is provided in the same plane as the face 26, the face 26 can be protected and the appearance is excellent.

Further, since the weight 29 is press-fitted into the outer peripheral portion 24 of the head body 22 in a dovetail groove shape, and the small projection 21 is fitted into the dovetail groove 30, its mounting strength is high. Can be large.

The present invention is not limited to the above embodiment, but various modifications can be made.

[0019]

According to the present invention, in a golf club head having a hosel provided on the negative side of the face and a concave portion provided on the rear portion of the face, the hosel is provided on the negative side of the face, and the rear portion of the face is provided. A golf club, comprising: a head main body having an annular protrusion formed on the outer surface of the head; and a weight made of a material having a larger specific gravity than that of the head main body having at least a sole portion fixed to the outer periphery of the protrusion. It is a head for use, and the depth of the center of gravity of the head can be increased to expand the sweet area.

In the present invention, the head body is made of titanium,
2. The golf club head according to claim 1, wherein the weight is made of a titanium alloy and the weight is made of a beryllium copper alloy, wherein the specific gravity difference is increased to further increase the depth of the center of gravity of the head to expand the sweet area. be able to.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a front view showing the first embodiment of the present invention.

FIG. 3 is a rear view showing the first embodiment of the present invention.

FIG. 4 is a plan view showing a first embodiment of the present invention.

FIG. 5 is a bottom view showing the first embodiment of the present invention.

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

[Explanation of symbols]

 1 head body 2 face 4 hosel 5 protrusion 10 weight 11 sole

Claims (2)

[Claims] 1. A golf club head having a hosel on the negative side of the face and a concave portion on the rear side of the face, wherein a hosel is provided on the negative side of the face and a protrusion is provided on the rear side of the face. A golf club head, comprising: a head body provided in an annular shape; and a weight made of a material that is fixed to the outer peripheral portion of the protrusion and has at least a sole portion and is made of a material having a specific gravity larger than that of the head body. 2. The golf club head according to claim 1, wherein the head body is made of titanium or a titanium alloy, and the weight is made of beryllium copper alloy.