JPH05337221A - Head for golf club - Google Patents

Abstract

PURPOSE:To enlarge a sweet area, and to provide a head for the golf club having a superwide area. CONSTITUTION:In front of a head main body 2 consisting of a beryllium copper alloy or stainless steel, a recessed part 5 and a window hole 6 are formed. A face member 4 formed by titanium or a titanium alloy is fitted and attached to the recessed part 5. In the rear of the window hole 6, a rear part shell 11 is provided through a cavity 10. Thus, the centroid G of the head comes near to the sole 1 and the rear part shell 11 side and is apart from the face 3 and the distance to the face 3 is increased. In such a manner, the sweet area can be enlarged.

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 generally called an iron.

[0002]

2. Description of the Related Art Conventionally, this type of forged iron is a sole, a face having a predetermined lie angle with respect to the sole,
The shaft mounting portion is formed, and thereafter, the shaft mounting hole, polishing and the like are performed to manufacture the shaft mounting portion. In such a conventional head, the sole side of the head rear portion is projected rearward in order to enlarge the sweet area. This is because the center of gravity of the head is located rearward, the distance between the center of gravity and the face is increased, and the sweet area resulting from this is enlarged.

[0003]

In the prior art described above, since the head is made of the same material, even if the sole side of the head rear portion is projected rearward, the center of gravity of the head is rearward. There is a limit to where it can be located, and therefore the expansion of the sweet area.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to expand the sweet area to provide a golf club head having an ultra wide area.

[0005]

SUMMARY OF THE INVENTION According to the present invention, in a golf club head having a face on the front surface and a shaft mounting portion on one side, a sole is formed and a window hole corresponding to the face is formed on the front surface. A golf club in which a head member is formed by integrally forming a rear shell through a cavity at the rear of the window hole to form a head body, and a face member made of a material having a smaller specific gravity than the head body material is fitted in the window hole. Is the head.

Further, the present invention is the golf club head, wherein the peripheral surface of the window hole is formed in an inversely tapered shape so that the rear side is deeper.

[0007]

With the above structure, since the center of gravity of the head is located on the sole side and the rear side, the distance between the center of gravity and the face can be increased, and a head for a super wide area golf club can be provided.

Further, the peripheral surface of the head body and the face member can be fixed in a dovetail groove shape.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. Beryllium copper alloy (specific gravity approximately 8.
2) or a head body 2 having a sole 1 formed of a material having a large specific gravity such as stainless steel (specific gravity approximately 7.9)
A window hole 6 is formed on the front surface side of the concave portion 5 through which a face member 4 having a head face 3 is fitted. The face member 4 is formed of, for example, titanium, a titanium alloy, a magnesium alloy, an aluminum, an aluminum alloy, a carbon fiber or the like in a thin plate shape made of a material having a smaller specific gravity than the head body 2. A shaft mounting portion 2B for connecting the shaft 2A is integrally provided on one side of the head body 2. All or part of the peripheral surface 7 of the recess 5 is formed in an inverse taper shape so that the rear side is deep. Further, a step portion 8 is formed in the window hole 6, and the peripheral surface 9 of all or part of the step portion 8 is formed in an inverse taper shape so that the rear side becomes deeper. Further, a rear shell 11 is integrally formed behind the window hole 6 through a cavity 10. That is, the lower portion of the rear shell 11 is connected to the sole 1, and the upper portion of the rear shell 11 is connected to the top 12 of the head. The face member 4 is fitted in the concave portion 5, and a convex portion 13 is provided on the rear surface thereof. The edge portion 4A of the face member 4 is formed slightly larger than the peripheral surface 7 in advance, and the edge portion 13A of the protrusion 13 is formed slightly larger than the peripheral surface 9 in advance. When the face member 4 is fixed to the head body 2, the face member 4 is press-fitted into the recess 5 by pressing or the like. At this time, the edge portion 4A of the face member 4 is fitted to the peripheral surface 7, and the edge portion 13A of the convex portion 13 is fitted to the peripheral surface 9 and fixed.

As described above, in the above embodiment, the head body 2 made of beryllium copper alloy or stainless steel is used.
A concave portion 5 and a window hole 6 are formed on the front surface of the head, and a face member 4 formed of a material having a small specific gravity such as titanium or a titanium alloy is fitted into the concave portion 5, whereby the center of gravity G of the head is It is closer to the sole 1 side made of a large material and is farther from the face 3 and is also closer to the sole 1 side. As a result, the distance between the center of gravity G and the face 3 is increased, so that an ultra wide area head can be provided. Further, since the head body 2 having the sole 1 is made of a metal material having a large specific gravity and the rear shell 11 is provided through the cavity 10, the center of gravity G of the head is further separated from the face 3 side,
The distance between the center of gravity G and the face 3 can be increased. Further, since the peripheral surface 7 and the peripheral surface 9 are formed in the inverse tapered shape, the face member 4 can be securely fixed.

FIGS. 3 and 4 show a second embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. In the second embodiment, a window 6 is formed in a head body 2 having a sole 1 through a recess 5 into which a face member 4 having a face 3 of the head is fitted on the front side thereof. A shaft mounting portion 2B is integrally provided on one side of the head body 2. All or part of the peripheral surface 7 of the recess 5 is formed in an inverse taper shape so that the rear side is deep. Further, a rear shell 11 is integrally formed behind the window hole 6 through a cavity 10. That is, the lower portion of the rear shell 11 is connected to the sole 1, and the upper portion of the rear shell 11 is connected to the top 12 of the head. The face member 4 is fitted in the recess 5 in a dovetail shape. The edge portion 4A of the face member 4
Is formed slightly larger than the peripheral surface 7. When the face member 4 is fixed to the head body 2, the face member 4 is press-fitted into the recess 5 by pressing or the like. At this time, the edge portion 4A of the face member 4 is fitted and fixed to the peripheral surface 7.

As described above, in the above embodiment, the concave portion 5 and the window hole 6 are formed in the front surface of the head body 2 made of a material having a large specific gravity, and the face member 4 made of a material having a small specific gravity is formed in the concave portion. The center of gravity G of the head is separated from the face 3 toward the sole 1 side made of a material having a large specific gravity and further closer to the sole 1 side by fitting the head 5 to the face 5, so that the distance between the center of gravity G and the face 3 is increased. And can provide a super wide area head.

The present invention is not limited to the above-mentioned embodiment, and for example, the edge portion 4A of the face member 4 and the convex portion
Various modifications are possible such that the edge portion 13A of 13 is formed in a reverse taper shape in advance and this may be press-fitted.

[0014]

According to the present invention, in a golf club head having a face on the front surface and a shaft mounting portion on one side, a sole is formed and a window hole is formed on the front surface corresponding to the face. A rear shell is integrally provided in the rear part of the window hole through a cavity to form a head body, and a face member made of a material having a specific gravity smaller than that of the head body material is fitted in the window hole, so that a large amount of material can be obtained. It is possible to provide a super wide-area golf club head by utilizing such a difference in specific gravity and further increasing the distance between the center of gravity of the head and the face by the rear shell provided through the cavity to expand the sweet area. .

Further, since the peripheral surface of the window hole is formed in a reverse taper shape so that the rear side becomes deeper, the face member can be securely fixed.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view showing the first embodiment of the present invention.

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

FIG. 2 is an exploded perspective view showing a second embodiment of the present invention.

[Explanation of symbols]

 2 head body 2B shaft mounting part 3 face 4 face member 6 window hole 7 peripheral surface 10 cavity 11 rear shell

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[Procedure amendment]

[Submission date] June 14, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief explanation of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view showing the first embodiment of the present invention.

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

FIG. 4 is an exploded perspective view showing a second embodiment of the present invention.

[Explanation of reference numerals] 2 head body 2B shaft mounting portion 3 face 4 face member 6 window hole 7 peripheral surface 10 cavity 11 rear shell

Claims (2)

[Claims] 1. A golf club head having a front face and a shaft mounting portion on one side,
A sole is formed and a window hole is formed in the front surface corresponding to the face, and a rear shell is integrally provided in the rear portion of the window hole via a cavity to form a head body, and the head body is provided in the window hole. A head for a golf club, characterized in that a face member made of a material having a smaller specific gravity than the material is fitted. 2. The golf club head according to claim 1, wherein the peripheral surface of the window hole is formed in a reverse taper shape so that the rear side becomes deeper.