JP2000107336A - Putter head for golf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soft putting sense, to delay the separation of a ball and to easily control the direction and speed of the ball by burying a metal having a predetermined range of Vickers hardness, and a specific value of a thickness, into a ball hitting part on a face. SOLUTION: A rectangular prism-shaped putter head A mounted on a point of a shaft S is formed by plural different kinds of metals laminated symmetrically left and right from a central part of the head A toward a heel HE and a tow T, that is, a single steel plate SP, plural pieces of copper blocks CB, plural pieces of steel blocks SB and plural sheets of copper plates CP. On this occasion, the hardness suitable for hitting a ball can not be obtained when the Vickers hardness of the copper block CB exposed to a hitting part H is less than Hv 50, and the separation of ball is accelerated when the Vickers hardness is over Hv 200. Accordingly, the Vickers hardness of the copper block CB is determined to be above Hv 50 and below Hv 200, and its thickness is determined to be at least 7 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a putter head for golf.

[0002]

2. Description of the Related Art Conventionally, golf putter heads have been formed of a single metal material, but recently putter heads formed of a plurality of dissimilar metals have been proposed.

[0003] With respect to this type of putter head, a putter head comprising a head body and an insert plate arranged at the center of the face of the head body is known. The head body is usually formed from a single metal having a large density or specific gravity, while the insert plate is formed, for example, from a stainless steel having a Vickers hardness of Hv300 or more and having a small density or specific gravity. (Hereinafter referred to as “prior art 1”).

According to the prior art 1, since the insert plate has a remarkably high hardness as described above, it is possible to minimize the generation of flaws on the face.

On the other hand, Japanese Patent Publication No. Hei 6-26634 discloses that
A putter head has been disclosed in which dissimilar metals having different densities or specific gravities are laminated from the sole surface side to the top surface side or from the face surface side to the back side (hereinafter referred to as “prior art 2”). .

According to the prior art 2, the depth of the center of gravity from the face surface of the putter head can be arbitrarily set or the position of the center of gravity can be lowered. In addition, by setting the direction of lamination of dissimilar metals from the heel side to the toe side of the head, the moment of inertia of the head can be increased, and the position of the sweet spot can be adjusted.

There is also known a putter head made of stainless steel and having a thin plate-like copper of about 1 to 3 mm adhered to a hitting surface (hereinafter referred to as "prior art 3").

[0008]

However, in the prior art 1, since the hardness of the insert plate is extremely high, when a ball, particularly a two-piece ball which has been widely used in recent years, is hit with the putter head of the prior art 1, In addition to giving the player a hard shot feeling, the ball is quickly separated from the ball, making it difficult to control the direction and speed of the ball.

Further, in Prior Art 2, there is no consideration at all in setting the hardness of the putter head face at the ball hitting portion. Therefore, Prior Art 2 does not disclose any means for solving the above-described problem of Prior Art 1.

In the prior art 3, since the copper adhered to the hitting surface is a thin plate having a thickness of about 1 to 3 mm, even if such a copper plate is provided on the hitting surface, it substantially affects the shot feeling. Never give.

An object of the present invention is to provide a golf putter head which can provide a soft feel at the time of hitting a ball, slows the separation of the ball, and can easily control the direction and speed of the ball. Is to do.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a golf putter head according to the first aspect of the present invention comprises:
In the ball hitting part (H) in the face (F), Hv5
A metal (CB) having a Vickers hardness of 0 to 200 and a thickness of 7 mm or more is embedded.
In the present invention, the ball hitting portion refers to a position corresponding to a sweet spot on the face.

According to a second aspect of the present invention, in the golf putter head of the first aspect, the metal (CB) is laminated with another metal (SP), and the plurality of metals (CB, S) are laminated.
P) is exposed to the ball hitting portion (H).

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a golf putter head A according to a first embodiment of the present invention will be described in detail with reference to FIGS.

As shown in FIG. 1, the putter head A is formed in a quadrangular prism shape, and is attached to the tip of a shaft S. The putter head A has a plurality of dissimilar metals, that is, a single steel plate SP, and a plurality of copper blocks CB, which are stacked symmetrically from the center toward each side of the heel HE and the toe T. CB, a plurality of steel blocks SB... SB, and a plurality of copper plates CP
.. CP.

That is, a single steel plate SP is disposed at the center of the putter head A, and a pair of copper blocks CB, CB are respectively laminated on both sides thereof. Outside each of the copper blocks CB, CB, four steel blocks SB, SB, SB, SB and three copper plates C
P, CP, and CP are alternately stacked. A copper block CB is stacked outside the outermost steel block SB thus stacked, and further, a steel block SB, a copper plate CP, and another steel block SB are stacked outside the copper block CB in this order. .

A steel plate SP, a plurality of copper blocks CB... CB, and a plurality of steel blocks SB.
B and a plurality of copper plates CP... CP are laminated in the above-described order, so that they can be easily joined by solid-phase joining. For example, explosive crimping, gas crimping, or the like can be applied. Is desirable.

If the thickness of the above-mentioned plate or block is shown as an example, the copper plate CP and the steel plate S
P each has a thickness of 1 mm, the steel block SB has a thickness of 6 mm, and the copper block CB
Has a thickness of 15 mm.

Such a laminate of a plurality of dissimilar metals is represented by NC
It is processed into an appropriate shape using a machine tool or the like, and thus the putter head A for golf of the present invention is obtained. In the hitting portion H on the face F of the putter head A obtained in this way, the steel plate SP and a pair of copper blocks CB, CB are exposed so as to be flush with the face F in a laminated state.

The steel plate SP disposed at the center of the putter head A is used as a reference line for confirming the center of the hitting portion H. Since the steel plate SP has a thin thickness of 1 mm as described above,
Even if the end face is exposed to the hitting portion H of the face F, this does not substantially affect the shot feeling, and the shot feeling by the putter head A is obtained by the copper block CB.

Here, the Vickers hardness of the block exposed at the hitting portion H has a great influence on the shot feeling when hitting the ball with the putter head A. If the Vickers hardness of this block is less than Hv50, the hardness of the hitting portion H is too low, and an appropriate hardness for hitting a ball cannot be obtained. On the other hand, when the Vickers hardness of the block exceeds Hv200, the ball not only gives the player a hard shot feeling but also makes the ball separate faster, making it difficult to control the direction and speed of the ball. Therefore, the block exposed to the hitting portion H should have a Vickers hardness of Hv 50 or more and 200 or less and a thickness of 7 mm or more.

Therefore, in the putter head A according to the first embodiment of the present invention, a copper block CB having a Vickers hardness in the range of Hv 55 to 100 is used as a block exposed to the hitting portion H. by this,
A soft feel at impact is obtained, the release of the ball becomes slow,
As a result, the direction and speed of the ball can be easily controlled.

In the putter head A of the present invention, a laminated structure of the copper plate CP, the stainless block SB, and the copper block CB is adopted also in the portion other than the hitting portion H. This is for obtaining an appropriate weight balance with respect to the entire length of A and enabling a stable stroke.

In the above-mentioned putter head A of the present invention, the stainless plate SP is disposed at the center of the hitting portion H, but this is not always necessary. The stainless plate SP and the copper blocks CB, CB on both sides thereof are provided. May be used, for example, a copper block having a thickness of 30 mm. In that case, it is desirable to draw or engrave a reference line for confirming the center of the hitting portion H on the upper surface of the copper block.

Next, a golf putter head B according to a second embodiment of the present invention will be described in detail with reference to FIG.

The putter head B is the same as the above-described butter head A except that a laminated structure composed of a plurality of plates and a plurality of blocks is different.

The putter head B is composed of a plurality of dissimilar metals, ie, a single steel plate S, which are symmetrically stacked from the center toward the respective sides of the heel HE and the toe T.
P, a plurality of copper blocks CB ... CB, a plurality of steel blocks SB ... SB, and a plurality of copper plates CP ...
And a CP.

That is, a single steel plate SP is disposed at the center of the putter head B, and a pair of copper blocks CB and CB are laminated on both sides thereof. Outside each of the copper blocks CB, CB, four steel blocks SB, SB, SB, SB and three copper plates C
P, CP, and CP are alternately stacked. Outside the outermost steel block SB thus laminated, four copper blocks CB, CB, CB, CB and three steel plates SP, SP, SP are alternately laminated.

A steel plate SP, a plurality of copper blocks CB... CB, and a plurality of steel blocks SB.
B and a plurality of copper plates CP... CP are stacked in the order described above, as in the first embodiment described above, by solid-phase bonding, for example, an explosion bonding method, a gas bonding method, or the like. It is desirable.

As an example of the thickness of the plate or block described above, as in the first embodiment, the copper plate CP and the steel plate SP each have a thickness of 1 mm, and the steel block SB has a thickness of 6 mm. And the copper block CB has a thickness of 15 mm.

Such a laminate of a plurality of dissimilar metals is referred to as NC
It is processed into an appropriate shape using a machine tool or the like, and thus the putter head B for golf of the present invention is obtained. The hitting portion H on the face F of the putter head B obtained in this way has a steel plate SP and a pair of copper blocks CB, CB stacked in the same plane as the face F, as in the first embodiment. It is exposed to become. The effect provided by the steel plate SP and the pair of copper blocks CB, CB is the same as the effect in the first embodiment.

In the putter head A according to the first embodiment, the end on the toe T side and the end on the heel HE side are each composed of one copper block CB, two stainless blocks SB, and one copper plate. In contrast, the putter head B according to the second embodiment has four copper blocks CB each at the end on the toe T side and the end on the heel HE side. And a total of seven members of three stainless steel plates SP. Therefore, the weight balance of the putter head B can be set more finely than that of the putter head A.

In order to change the setting range of such a weight balance, in the first and second embodiments described above,
By changing the laminated structure of the portion other than the hitting portion H, for example, the number of components at the end on the toe T side and the end on the heel HE side may be increased or decreased.

FIGS. 4 to 6 show modified examples in which an NC machine tool or the like is used to form another shape based on the golf putter head B described above. FIG. 4 is a plan view of the modification, FIG. 5 is a rear view of the modification, and FIG. 6 is a side view of the modification.

Next, a golf putter head C according to a third embodiment of the present invention will be described below with reference to FIG.

The putter head C is composed of a square pillar-shaped stainless steel block SB as a head body and a cylindrical copper block CB buried at a position corresponding to a hitting portion on the face F thereof. This copper block CB
Has a Vickers hardness in the range of Hv 55 to 100, and is exposed to the hitting portion so as to be flush with the face F.

Therefore, according to the putter head C, a soft hit feeling is obtained and the ball is separated slowly, as a result, as in the first and second embodiments, by the copper block CB. Direction and speed can be easily controlled. Moreover, the putter head C according to the third embodiment of the present invention can be easily obtained by embedding the above-described copper block CB in a conventional putter head. In other words, it is possible to easily change the conventional putter head to a putter head that can obtain a soft feel at impact without largely changing the overall shape and weight of the conventional putter head.

According to the putter head C described above, the end face of the copper block CB is exposed in a circular shape on the face F. The shape is arbitrary, for example, an elliptical shape,
Polygonal shapes such as a square shape, a rectangular shape, and a triangular shape may be used.

Next, a golf putter head D according to a fourth embodiment of the present invention will be described below with reference to FIG.

The putter head D is composed of a stainless block SB, a copper block CB, and another stainless block SB stacked from the sole side to the top side.

That is, the stainless steel block SB, the copper block CB and the other stainless steel block SB have substantially the same rectangular prism shape, and the stainless steel block SB and the other stainless steel blocks SB are located above and below the copper block CB. Stainless steel blocks SB are respectively laminated. In order to stack these blocks, it is desirable to apply solid-phase bonding, for example, an explosion bonding method, a gas bonding method, or the like, as in the first and second embodiments.

This copper block CB is set at 10
Vickers hardness in the range of 0
It is exposed so as to be on the same plane as. This face F
The copper block CB exposed to the right crosses the center part of the hitting portion H in the horizontal direction.

Therefore, according to the putter head D, the soft hit feeling is obtained and the ball is separated slowly, as a result of the copper block CB, as in the first to third embodiments. Direction and speed can be easily controlled.

In the present invention, the diameter of the hitting portion H is desirably 10 mm or more, and more desirably around 30 mm, although it depends on the size of the putter head.

In the first to fourth embodiments described above, copper is used as the metal having a Vickers hardness of Hv 50 or more and 200 or less, but any metal having a Vickers hardness within this range may be used. For example, Hv
Brass with Vickers hardness of 85 to 145, Hv1
Duralumin having a Vickers hardness of 10 to 180 may be used. In addition to using these metals alone, a plurality of metals having a Vickers hardness of Hv 50 or more and 200 or less may be laminated and used. In this case, if a plurality of metals having substantially the same Vickers hardness and different densities or specific gravities are used, the weight balance can be finely set. Furthermore, you may laminate | stack and use the above-mentioned metal and the metal which has Vickers hardness exceeding Hv200.

In the present invention, the arrangement pattern of the materials may be changed by changing the thickness of the materials or by changing the materials themselves to stainless steel.
By changing to copper, brass, titanium or the like, a putter head can be manufactured freely and easily in any number of combinations.

[0047]

According to the present invention described in detail above, claim 1
As described in, the ball hitting part on the face,
With a Vickers hardness of Hv 50 or more and 200 or less, a metal having a thickness of 7 mm or more is embedded, so that a soft feel at impact can be obtained when hitting a ball, slowing the ball separation and reducing the direction and speed of the ball. Can be easily controlled.

According to a second aspect of the present invention, in the golf putter head according to the first aspect, if the metal is laminated with another metal and a plurality of laminated metals are exposed to the ball hitting portion, The weight balance can be set finely.

[Brief description of the drawings]

FIG. 1 is a perspective view of a putter head for golf according to a first embodiment of the present invention.

FIG. 2 is a plan view of the putter head of FIG. 1 before a shaft is attached.

FIG. 3 is a plan view of a putter head for golf according to a second embodiment of the present invention.

FIG. 4 is a plan view showing a modification of the putter head for golf shown in FIG. 3;

FIG. 5 is a rear view of the modification of FIG. 4;

FIG. 6 is a side view of a modification of FIG. 4;

FIG. 7 is a perspective view of a putter head for golf according to a third embodiment of the present invention.

FIG. 8 is a perspective view of a putter head for golf according to a fourth embodiment of the present invention.

[Explanation of symbols]

A putter head for golf according to the first embodiment of the present invention B putter head for golf according to the second embodiment of the present invention C putter head for golf according to the third embodiment of the present invention D fourth embodiment of the present invention Golf putter head according to the present invention F Face H Ball hitting portion CB Hv 50 to 200 Vickers hardness metal SP Other metals

Claims (2)

[Claims] The ball hitting portion of the face is provided with Hv
A putter head for golf, wherein a metal having a Vickers hardness of 50 or more and 200 or less and a thickness of 7 mm or more is embedded. 2. The putter head according to claim 1, wherein the metal is laminated with another metal, and a plurality of metals in a laminated state are exposed at the ball hitting portion.