JP2671288B2 - Golf club head - Google Patents

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 or putter.

[0002]

2. Description of the Related Art A golf club head has a face which is a hitting surface of a golf ball, a back, a sole, a top, a toe, a heel, and a neck to which a shaft is attached. Conventionally, heads such as irons and putters have been integrally forged using iron or the like as a whole, including the above-described parts. However, with a head made entirely of the same material, blurring tends to occur during a shot, and the so-called sweet area is narrow. The sweet area is an area on the face where the shot ball flies stably and straight. It is known that the sweet area can be widened by shifting the center of gravity of the entire head to the rear side or by distributing the weight distribution of the head to the peripheral portion with respect to the face. Also, in order to make the shot ball easy to rise or to lengthen the ball foot, the center of gravity may be set low.

In order to achieve such weight distribution of the head, a concave cavity is conventionally formed on the back side of the head. However, there is a limit in setting the weight distribution for a head that is entirely integrated. Further, in order to position the center of gravity of the entire head further rearward and lower without making the entire head heavy, for example, a head in which a weight made of beryllium copper alloy is fixed to the lower part of the back side of the head body made of titanium alloy is also proposed. Has been done. However, simply fixing the weight to the lower portion on the back side of the head body has a limitation in expanding the sweet area.

[0004]

As described above, the conventional iron or putter head has a problem that the sweet area is narrow because the entire head is integrally formed of the same material. In addition, there is a type in which a separate weight is fixed to the head main body. However, conventionally, since the weight was simply fixed to the lower portion on the back side of the head main body, there was a problem that expansion of the sweet area was limited.

The present invention is intended to solve such problems, and it is a first object of the present invention to further expand the sweet area and lower the center of gravity of a golf club head such as an iron or a putter. To aim.
A second object is to provide a golf club head suitable for a player who tends to slice. A third object is to provide a golf club head suitable for a player who tends to hook.

[0006]

In order to achieve the first object, a head main body having a neck is provided with a weight made of a material having a specific gravity larger than that of the material of the head main body. In the golf club head,
As the weight, an annular back side weight is provided on the back side peripheral portion of the head body, face side weights are provided on the face side of the head body along the toe side, sole side and heel side, and on the sole side of the head body. A sole-side weight is provided, and the back-side weight, the face-side weight, and the sole-side weight are separated from each other.

According to a second aspect of the present invention, in the golf club head according to the first aspect of the invention, in order to achieve the first object better, the sole-side weight is closer to the toe side and the heel side than the central portion. It is a big one.

According to a third aspect of the present invention, in the golf club head according to the first aspect of the invention, in order to achieve the second object, the sole side weight has a toe side larger than a heel side. Is.

According to a fourth aspect of the present invention, in the golf club head of the first aspect of the invention, in order to achieve the third object as well, the sole side weight has a heel side larger than a toe side weight. is there.

[0010]

According to the golf club head of the present invention, the back side weight and the face side weight are provided on the back side peripheral portion and the face side peripheral portion of the head body without increasing the overall weight. , The weight distribution of the head is concentrated as much as possible in the peripheral part with respect to the face, and the sweet area is expanded. Along with this, a sole weight is provided on the sole side of the head main body to achieve a low center of gravity. By the way, for example, the iron club head is
Generally, the width on the sole side is wide and the width on the top side is narrow, but it is difficult to provide both the back side weight and the face side weight that are sufficiently thick on the top side. Therefore, the top side of the head body has only the back side weight, but this has the effect of making the center of gravity of the entire head rearward, and is advantageous for expanding the sweet area. Further, the sole-side weight is separated from the back-side weight and the face-side weight, but this increases the flexibility of setting the shape of the sole-side weight in manufacturing.

In the golf club head according to the second aspect of the present invention, in the sole side weight, the toe side and the heel side are made larger than the central portion, so that the weight distribution between the toe side and the heel side is even on the sole side of the head. To further expand the sweet area.

Further, in the golf club head according to the third aspect of the present invention, in the sole side weight, the toe side is made larger than the heel side, whereby the weight distribution of the head is further biased to the toe side. This makes the golf club suitable for players with a tendency to slice.

On the other hand, in the golf club head of the fourth aspect of the present invention, in the sole side weight, the heel side is made larger than the toe side, whereby the weight distribution of the head is further biased to the heel side. This makes the golf club suitable for players who tend to hook.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the golf club head of the present invention will be described below with reference to FIGS.
The head of this first embodiment is for an iron club, where 1a is the front face, 2a is the back back, 3a is the bottom sole, 4a is the top top, 5a is the toe on one side, and 6a is the other. The side heel, 7a, is the neck connecting the shafts. In terms of components, the head includes a head body 11a and a back side weight 12a, a face side weight 13a and a sole side weight 14a which are separate from each other. Head body
11a is made of pure titanium or titanium alloy (specific gravity is about 4.5) and forms a large part of the head including the neck 7a. The weights 12a, 13a, and 14a are made of beryllium copper alloy (specific gravity is approximately 8.2), but the face-side weight 13a forms a part of the face 1a and the back-side weight 13a forms a part of the back 2a. However, the sole-side weight 14a forms a part of the sole 3a.

A continuous annular recessed groove 16a is formed in the periphery of the head body 11a on the back 2a side. The built-in groove 16a is in the shape of a dovetail groove whose width gradually increases toward the front. Then, in the built-in groove 16a, the continuous annular back side weight is formed.
12a is pressed in. In addition, a concave built-in groove is also formed around the face 1a side of the head body 11a.
17a is formed, but this built-in groove 17a is
Side, the sole 3a side and the heel 6a side, and has a substantially U-shape, not on the top 4a side. Also, this built-in groove 17a
Has a dovetail shape that gradually widens toward the rear. The face-side weight 13a having the same substantially U-shape is fitted in the built-in groove 17a in a press-fitted state. Further, a substantially linear concave mounting groove 18a is formed in the peripheral portion of the head body 11a on the sole 3a side. The built-in groove 18a is in the shape of a dovetail groove that gradually widens upward. Then, the substantially linear sole- side weight 14a is press-fitted into the built-in groove 18a. The toe 5a side and the heel 6a side of the sole- side weight 14a are wide portions 19a and 20a having a width larger than that of the central portion. In the area surrounded by the annular back side weight 12a, a concave cavity 26a is formed on the back 2a side of the head body 11a.

Next, a method of manufacturing the head will be described. The head main body 11a is basically formed by forging, but at this time or simultaneously, the built-in grooves 16a, 17a, 18a are formed by cutting in the post-processing. Also weight 12
The a, 13a, and 14a are also formed by forging. Then, the back side weight 12a is installed in the mounting groove 16a on the back 2a side of the head body 11a, the face side weight 13a is installed in the mounting groove 17a on the face 1a side of the head body 11a, and the sole side weight 14a.
Are cold-pressed into the built-in grooves 18a on the sole 3a side of the head body 11a. With this press fitting, weights 12a, 13a
, 14a are finally plastically deformed and the built-in groove 16a
, 17a, 18a will be dovetailed. Due to this dovetail connection, the weights 12a, 13a, 14a are
Securely fixed to 11a. Also, the back side weight 12a
After press-fitting, the cavity 26a is formed by milling using a machining center.

According to the structure of the first embodiment, the back 2a of the head body 11a made of pure titanium or titanium alloy is used.
The back side weight 12a and the face side weight 13a, which are made of beryllium copper alloy, are incorporated into the peripheral portion on the side of the head and the peripheral portion on the side of the face 1a, respectively, and the head body 11
Incorporate the sole weight 14a on the sole 3a side of a,
Further, since the cavity 26a is provided in the central portion on the back 2a side of the head body 11a, the weight distribution of the head can be largely concentrated on the peripheral portion with respect to the face 1a while suppressing the weight of the entire head. This will greatly expand the sweet area. That is, in a wide range of the face 1a, the shot ball comes to fly stably and straight. Along with this, especially the sole side weight 14a
As a result, the center of gravity can be lowered. This makes it easier for the shot ball to rise, and makes the ball foot long and stable. Thus, the club can be easily controlled.

By the way, the head of an iron club generally has a wide width on the sole 3a side and a narrow width on the top 4a side, but the back side weight 12a and the face which are sufficiently thick on the top 4a side and face. It is difficult to provide the side weights 13a together. Therefore, the head body 11a
The top 4a side is not the face side weight 13a but only the back side weight 12a, but this makes the center of gravity of the entire head rearward (makes the center of gravity deeper).
It is effective and advantageous for expanding the sweet area.

Moreover, the weight 14a on the sole side is attached to the toe 5a.
Since the wide side portions 19a and 20a are formed on the side of the heel 6a and the side of the heel 6a, the weight distribution is also on the side of the toe 5a and the heel 3a.
By being assigned to the 6a side, the sweet area is further expanded.

Further, since the sole side weight 14a is separated from the back side weight 12a and the face side weight 13a, the flexibility of setting the shape of the sole side weight 14a is increased in manufacturing. That is, as in the first embodiment, the tow
A sole-side weight 14a having wide portions 19a, 20a on the 5a side and the heel 6a side, or a sole-side weight 14b having a wide portion 19b only on the toe 5b side as in the second embodiment shown in FIG. Heel as in the third embodiment shown in FIG.
The sole weight 14c having the wide portion 20c only on the 6c side can be freely used.

As in the second embodiment, in the sole-side weight 14b, the toe 5b side is made larger than the heel 6b side, and the weight distribution of the head is further biased toward the toe 5b side, so that the slice Become a golf club suitable for players with a tendency. On the other hand, as in the third embodiment, in the sole-side weight 14c, the heel 6c side is made larger than the toe 5c side, and the weight distribution of the head is more biased toward the heel 6c side, so that there is a tendency of hooking. Become a golf club suitable for players. In the reference numerals shown in FIGS. 5 and 6, the same numerals are used for the portions corresponding to those in the first embodiment, and the subscripts b 1 and c 2 are added to these. The same applies to FIG. 7 showing the fourth embodiment, in which the subscript is d.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made. For example,
Although the head of the above embodiment is an iron club, the present invention can be applied to a head of a putter as in the fourth embodiment shown in FIG. Furthermore, the materials of the head body and the weight are not limited to those in the above-mentioned embodiment. For example, as the material of the head body, in addition to pure titanium and titanium alloy,
An appropriate material having a relatively small specific gravity such as an aluminum alloy is used. As the material of the weight, besides the beryllium copper alloy, another copper alloy or an appropriate material having a relatively large specific gravity such as stainless steel (specific gravity of approximately 7.9) is used. Further, with respect to the back side weight and the face side weight, the weight distribution can be divided into the right and left in the same manner as the sole side weight, so that hook measures and slice measures can be taken.

[0023]

According to the first aspect of the present invention, the back side weight and the face side weight are provided on the back side and the face side peripheral portions of the head main body, respectively.
Since the sole side weight is provided on the sole side of the head body, the weight distribution of the head can be largely concentrated on the peripheral portion with respect to the face, the sweet area can be greatly expanded, and the center of gravity can be lowered. Moreover, in an iron club head whose width on the top side is generally narrower than that on the sole side, it is more difficult to provide both a back side weight and a face side weight that are sufficiently thick on the top side, whereas the head body Since the top side is not the face side weight but only the back side weight, the center of gravity of the entire head can be further rearward, and the sweet area can be further expanded. Further, since the sole-side weight is provided separately from the back-side weight and the face-side weight, the shape of the sole-side weight can be set more freely in manufacturing.

According to the second aspect of the present invention, the sole side weight has a toe side and a heel side which are larger than the central portion,
Even on the sole side of the head, the weight distribution is divided between the toe side and the heel side, so the sweet area can be further expanded.

According to the invention of claim 3, since the toe side of the sole side weight is larger than that of the heel side, it is possible to provide a golf club suitable for a player who tends to slice.

According to the invention of claim 4, since the heel side of the sole side weight is larger than the toe side weight, it is possible to provide a golf club suitable for a player who tends to hook.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a golf club head of the present invention and corresponds to the AA cross section of FIG.

FIG. 2 is a front view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a bottom view of the same.

FIG. 5 is a bottom view showing the second embodiment of the golf club head of the present invention.

FIG. 6 is a bottom view showing a third embodiment of the golf club head of the present invention.

FIG. 7 is a sectional view showing a fourth embodiment of the golf club head of the present invention.

[Explanation of symbols]

 1a, 1b, 1c, 1d face 2a, 2b, 2c, 2d back 3a, 3b, 3c, 3d sole 5a, 5b, 5c toe 6a, 6b, 6c heel 7a, 7b, 7c neck 11a, 11b, 11c, 11d head Body 12a, 12d Back side weight 13a, 13d Face side weight 14a, 14b, 14c, 14d Sole side weight

Claims (4)

(57) [Claims] 1. A golf club head in which a head body having a neck is provided with a weight made of a material having a larger specific gravity than the material of the head body. As the weight, a ring-shaped back is provided around a back side of the head body. Side weights are provided, face side weights along the toe side, sole side and heel side are provided on the face side of the head body, sole side weights are provided on the sole side of the head body, and these back side weights, face side weights and soles are provided. A golf club head, characterized in that the side weights are separate from each other. 2. The golf club head according to claim 1, wherein the sole-side weight has a toe side and a heel side that are larger than a central portion. 3. The golf club head according to claim 1, wherein the sole-side weight has a toe side larger than a heel side. 4. The golf club head according to claim 1, wherein the sole side weight has a heel side larger than a toe side weight.