JPH09327534A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve strength in the golf club head of a hollow iron shape. SOLUTION: A rear shell 4 provided with a sole 7 is provided on the rear part of a face 2 through a hollow part 3. A clearance A is placed at the rear part of the face 2 and a partition wall 14 is provided in the hollow part 3. By the partition wall 14, the strength of not only the rear shell 4 but also this entire head 1 is improved without thickening the rear shell 4. Thus, even when it is prescribed head weight, a shot is excellently made without deforming the rear shell 4 or destroying the balance of the head 1 at the time of the shot.

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 made of metal, and more particularly to a hollow iron type or wood type golf club head having Nos. 1 to 6, particularly Nos. 1 to 3.

[0002]

Conventionally, as this type, a rear shell made of pure titanium or the like as shown in FIG. 1 of Japanese Patent Laid-Open No. 6-296715 is made of pure titanium or the like through a hollow portion behind a face made of pure titanium or the like. There is disclosed a golf club head in which a weight made of beryllium copper alloy or the like is fixed to a window hole provided at an appropriate position of the rear shell. Also, JP-A-6-2
Japanese Patent No. 96716 discloses a golf club in which a rear shell made of pure titanium or the like is provided behind a face made of pure titanium or the like through a hollow portion, and a weight made of beryllium copper alloy or the like is fixed to the sole of the rear shell. A head is disclosed.

Such a head is called a hollow metal iron, and since it has a hollow portion of about 50 to 60 cubic centimeters, the volume of the head can be increased, and thus a stable feeling can be obtained at the time of shot, and further, Since the back of the face is a hollow part, the face can be elastically deformed freely at the time of a shot, and the elastic force can be increased.

In such a head, a predetermined strength is required in order to prevent deformation during shots.
For this reason, the face and the rear shell are thickened, but since the predetermined weight is defined according to the count of each golf club, there is a limit to thickening the face and the rear shell.

Therefore, it is an object of the present invention to improve the strength of a metal golf club head provided with a rear shell having a sole via a hollow portion behind the face.

[0006]

According to the present invention, there is provided a metal golf club head having a rear shell provided with a sole through a hollow portion at the rear of the face, wherein partition walls are provided behind the face at intervals. The golf club head is characterized in that it is provided in the hollow portion, and the partition wall can improve the strength of the rear shell and eventually the head.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The golf club head 1 (hereinafter referred to as a head) having the iron number of 1 to 6 is
The plate-shaped face 2 and, for example, 50
The rear shell 4 is provided with a hollow portion 3 having a size of about 60 cubic cm and fixed thereto. The face 2 is formed of a light metal such as pure titanium or a titanium alloy, while the rear shell 4 is formed of a light metal such as pure titanium or a titanium alloy, or iron such as stainless steel. The face 2 is provided with a lateral groove 5 called a score line on the front surface. The rear shell 4 for forming the hollow portion 3 is provided with an opening 6 for fixing the face 2 on the front surface, a sole 7 for the lower portion, and a hosel 9 for connecting the shaft 8 on the negative side. There is. Opening 6
The peripheral surface 10 is formed in an inversely tapered shape so that the rear portion is wide, and an edge wall 11 is formed at the rear portion of the peripheral surface 10. Then, the face 2 is press-fitted into the opening 6 by a press or the like, and the back surface of the face 2 is locked to the edge wall 11.
Then, the edge 12 of the face 2 is fitted in a plastically deformed state. As a result, the edge 12 comes into close contact with the peripheral surface 10 in an inversely tapered shape in a plastically deformed state, and is prevented from coming off. Furthermore, a peripheral surface 13 is formed on the rear of the edge wall 11.
A partition wall 14 is provided integrally with the rear shell 4 via the
Thus, the hollow portion 3 is divided into a hollow portion front portion 3A and a hollow portion rear portion 3B. The partition wall 14 is a position where the face 2 does not come into contact with the face 2 even if the face 2 is elastically deformed and dented during the shot.
Located on the side. Regarding the widths of the face 2 and the partition wall 14, as shown in FIG. 3, an interval A is set such that the face 2 is arranged as close to the face 2 side as possible so as not to come into contact with the face 2 when elastically deformed during a shot. Further, as shown in FIG. 4, the center of gravity G is set as an interval B larger than the interval A (A <B).
By arranging the position at the rear, the depth of the center of gravity L can be increased and the sweet area can be expanded.

Next, the operation of the above configuration will be described. When a ball (not shown) is shot by the head 1, the face 2 is elastically deformed and hits the ball. At this time, the rear shell 4 is slightly deformed due to the elastic deformation of the face 2, so that the balance may be lost and a miss shot may occur.
However, since the partition wall 14 is provided and reinforced in the hollow portion 3, the rear shell 4 is not deformed. Therefore, at the time of shot, the back shell 4 is not deformed and the balance is not lost.

As described above, in the above-described embodiment, since the partition wall 14 is provided in the hollow portion 3 at the rear of the face 2 at the intervals A and B, the strength of the rear shell 4 and thus the entire head 1 is improved. 4 can be improved without increasing the thickness.
Therefore, even if the weight of the head is predetermined, the rear shell 4 is not deformed at the time of the shot, and the head 1 can be shot well without losing the balance.

Further, the partition wall 14 is located rearward of the recessed position due to the elastic deformation of the face 2 during the shot. Therefore, the face 2 does not come into contact with the partition wall 14 at the time of a shot, and can be elastically deformed freely and the flight distance can be extended. Further, by appropriately setting the intervals A and B between the face 2 and the partition wall 14 as shown in FIGS. 3 and 4, the position of the center of gravity G can be freely set and the sweet area can be enlarged and adjusted. .

Further, the peripheral surface 10 of the opening 6 of the rear shell 4 is formed in a reverse taper shape, and the face 2 is press-fitted into the peripheral surface 10 by pressing or the like so that the peripheral surface 10 and the edge 12 are formed in a reverse taper shape. By processing, the face 2 and the rear shell 4 can be firmly fixed, and even the face 2 and the rear shell 4 made of a material that cannot be fixed by welding or the like can be fixed. Further, the pressing force is also applied to the rear shell 4 during the press working, but since the partition wall 14 is provided to improve the strength of the rear shell 4, the rear shell 4 is
Has a predetermined shape during press working, so that the face 2 and the rear shell 4 can be accurately fixed to each other.

In addition, the face 2 is made of a light metal such as pure titanium, and the rear shell 4 is made of a material having a larger specific gravity than the face 2, such as iron such as stainless steel. Therefore, the center of gravity L can be lengthened to further expand the sweet area.

FIGS. 5 and 6 show the second and third embodiments 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, the rear shell 4 is composed of a rear shell front portion 4A and a rear shell rear portion 4B, and an inversely tapered peripheral surface 10 for press-fitting and fixing the face 2 to the rear shell front portion 4A is provided. A partition wall 14A is formed on the edge wall 11 of the surface 10 with the peripheral surface 13 interposed therebetween. Then, the rear surface edge of the rear shell front portion 4A and the front surface edge of the rear shell rear portion 4B are welded by the welding portion 21 to fix them to each other.

Next, the operation of the above structure will be described. When the ball is shot by the head 1, since the partition wall 14 is provided in the hollow portion 3 and is reinforced, the rear shell 4 is not deformed, and the rear shell 4 is not deformed at the time of shot and the balance is lost. There is no such thing.

As described above, since the partition wall 14 is provided in the hollow portion 3 behind the face 2 in the above embodiment,
It is possible to improve the strength of the rear shell 4 and thus the entire head 1. For this reason, the rear shell 4 is not deformed at the time of shot, and the head 1 can be shot favorably without losing its balance.

Further, since the partition wall 14 is located rearward of the recessed position due to the elastic deformation of the face 2 during a shot, the face 2 can be elastically deformed freely and the flight distance can be extended.

Further, the peripheral surface 10 of the opening 6 of the rear shell 4 is formed in a reverse taper shape, and the face 2 is press-fitted into the peripheral surface 10 by pressing or the like so that the peripheral surface 10 and the edge 12 are plastically formed in a reverse taper shape. Face 2 made of a material that cannot be welded by processing
Even the rear shell 4 can be firmly fixed. Further, the rear shell 4 is kept in a predetermined shape during press working, so that the face 2 and the rear shell 4 can be accurately fixed to each other.

In addition, the face area 2 is made of a light metal such as pure titanium, and the rear shell 4 is made of a material having a higher specific gravity than the face 2, such as iron such as stainless steel, to enlarge the sweet area. You can

Further, by integrating the rear shell 4 into two, that is, the rear shell front portion 4A having the partition wall 14A and the rear shell rear portion 4B, the rear shell front portion 4A and the rear shell rear portion 4B are respectively excellent in strength. A rear shell 4 having a hollow front portion 3A and a hollow rear portion 3B, each of which is manufactured by forging to have excellent strength and has a partition wall 14 therebetween.
As a result, the head 1 can be manufactured.

In the third embodiment, the rear shell 4 comprises a rear shell front portion 4A and a rear shell rear portion 4B, and an inversely tapered peripheral surface 10 for press-fitting and fixing the face 2 to the rear shell front portion 4A is provided. A partition wall 14A is formed on the edge wall 11 of the peripheral surface 10 with the peripheral surface 13 interposed therebetween. Further, a peripheral surface 22 that spreads rearward is provided at the rear surface edge of the rear shell front portion 4A, and the front edge 23 of the rear shell rear portion 4B is press-fitted by a press or the like to fix them by plastic deformation in an inverse taper shape. There is.

Next, the operation of the above configuration will be described. When the ball is shot by the head 1, since the partition wall 14 is provided in the hollow portion 3 and is reinforced, the rear shell 4 is not deformed, and the rear shell 4 is not deformed at the time of shot and the balance is lost. There is no such thing.

As described above, since the partition wall 14 is provided in the hollow portion 3 behind the face 2 in the above embodiment,
It is possible to improve the strength of the rear shell 4 and thus the entire head 1. For this reason, the rear shell 4 is not deformed at the time of shot, and the head 1 can be shot favorably without losing its balance.

Further, since the partition wall 14 is located rearward of the recessed position due to the elastic deformation of the face 2 during the shot, the face 2 can be elastically deformed freely and the flight distance can be extended.

Further, the peripheral surface 10 of the opening 6 of the rear shell 4 is formed in a reverse taper shape, and the face 2 is press-fitted into the peripheral surface 10 by pressing or the like so that the peripheral surface 10 and the edge 12 are formed in a reverse taper shape. Face 2 made of a material that cannot be welded by processing
Even the rear shell 4 can be firmly fixed. Further, the rear shell 4 is kept in a predetermined shape during press working, so that the face 2 and the rear shell 4 can be accurately fixed to each other.

Moreover, the face area 2 is made of a light metal such as pure titanium, and the rear shell 4 is made of a material having a higher specific gravity than the face 2, such as iron such as stainless steel, to enlarge the sweet area. You can

Further, by integrating the rear shell 4 into two pieces, that is, the rear shell front portion 4A having the partition wall 14A and the rear shell rear portion 4B, the rear shell front portion 4A and the rear shell rear portion 4B are respectively excellent in strength. A rear shell 4 having a hollow front portion 3A and a hollow rear portion 3B, each of which is manufactured by forging to have excellent strength and has a partition wall 14 therebetween.
As a result, the head 1 can be manufactured. Further, the rear shell front portion 4A and the rear shell rear portion 4B are firmly fixed to each other by the inversely tapered peripheral surface 22 and the front edge 23 which are fixed by plastic deformation.

The present invention is not limited to the above-mentioned embodiment, and for example, although an iron type golf club is shown in the embodiment, a metal hollow wood type golf club head called metal wood may be used. Further, in the second and third embodiments, the rear shell 4 is divided into two parts such as the rear shell front part 4A and the rear shell rear part 4B, but those divided into three or more parts may be integrated. Various modifications are possible such as the rear shell rear portion 4B in the third embodiment may be formed by integrating a plurality of divided shells.

[0028]

According to the present invention, in a metal golf club head having a rear shell provided with a sole via a hollow portion at the rear of the face, partition walls are provided in the hollow portion at intervals behind the face. The golf club head is characterized in that the strength of the head can be improved by the partition wall, and deformation of the head during shots can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective 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 first embodiment of the present invention.

FIG. 4 is a cross-sectional view showing the first embodiment of the present invention in which the partition wall is in the retracted position.

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

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

[Explanation of symbols]

 2 Face 3 Hollow part 4 Rear shell 7 Sole 14 Partition wall AB Spacing

Claims (1)

[Claims] 1. A metal golf club head having a rear shell provided with a sole through a hollow portion behind the face, wherein partition walls are provided in the hollow portion behind the face at intervals. And a golf club head.