JP2001231898A - Golf putter head - Google Patents

Abstract

(57) Abstract: A putter head having a neck portion has a high degree of design freedom by combining a material having a low specific gravity and a material having a high specific gravity. SOLUTION: A face portion 20 formed of a substantially flat surface for hitting a golf ball, and a sole portion 21 in contact with the ground.
A head body 1 comprising an upper end portion of the face portion 20 and a blade portion 6 extending from the toe 4 side to the heel 5 side and an upper surface portion formed behind the blade portion 6, and a hosel portion 2 for fixing a shaft; In a putter head for golf having a neck portion 3 connecting the hosel portion 2 and the head body portion 1, the head body portion 1 is formed of a metal material having a specific gravity of 5.0 or less. Also, weight portions 7 and 8 made of a metal material having a specific gravity of 10 or more are provided at least on the rear side of the toe 4 and the heel 5,
The weights 7, 8 are provided on the toe 4 side and the heel 5 side of the head main body 1 so as to expose the upper surface, the sole surface, and the side surfaces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf putter head.

[0002]

2. Description of the Related Art A putter without a neck, such as a mallet type putter, uses a metal having a relatively low specific gravity, and a material having a high specific gravity is fixed to a head body by bonding or fitting. There was a putter head.
However, a putter head provided with a neck portion, such as a pin-type putter head, requires the strength of the neck portion, and thus has been manufactured using a material having a relatively large specific gravity, such as stainless steel or a copper alloy.

[0003]

However, in the above-described technique, the weight of the putter having the neck portion is determined by the size thereof, so that the degree of freedom of design is small and it is not satisfactory for general golfers.

Accordingly, the golf putter head of the present invention provides a golf putter head having high design flexibility by combining a material having a low specific gravity and a material having a high specific gravity in a putter head having a neck portion. With the goal.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is directed to a face portion for hitting a golf ball, which has a substantially flat surface, a sole portion in contact with the ground, and an upper end portion of the face portion. A head body comprising a blade portion extending from the toe side to the heel side and an upper surface formed behind the head portion, a hosel portion for fixing the shaft, and a neck portion connecting the hosel portion and the head body portion. In a putter head for golf, a head body is formed of a metal material having a specific gravity of 5.0 or less, and a weight made of a metal material having a specific gravity of 10 or more on at least a toe side and a heel side behind a blade portion of the head body. Parts are provided, and these weight parts are provided on the toe side and the heel side of the head body so as to expose the upper surface, the sole surface, and the side surfaces.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a golf putter head according to the present invention, as shown in FIG. 1, a head body 1 is made of a metal material having a specific gravity of 5.0 or less, specifically, a titanium alloy, an aluminum alloy, a magnesium alloy. It forms with. In particular, a metal material having a small specific gravity of 3.0 or less is preferable. Among aluminum alloys, a material having a tensile strength of 400 Mpa or more, such as duralumin or A201, is particularly preferable. By using a material having the strength described above, the length of the hosel 2 can be 40 mm or more and 100 mm or less, preferably 45 mm or more and 60 mm or less, and the cross-sectional area of the neck portion 3 is 60 mm ² or more and 100 mm ² or less, preferably it can be formed 70 mm ² or more 90 mm ² or less in a relatively narrow neck portion 3 with neat visually, to obtain a sufficient strength to strength.

Metal weight portions 7, 8 having a specific gravity of 10 or more are arranged at least behind the toe 4 side and the heel 5 side blade portion 6 of the golf putter head body 1 of the present invention, and the upper surface and the sole surface are provided. And the weights 7, 8 so that the side surfaces are exposed.
Are fitted and fixed on the left and right sides of the back surface of the head body 1. By being exposed and fixed, the weight portions 7 and 8 having a large specific gravity are arranged far from the center of gravity of the head, and the moment of inertia around the axis of the center of gravity of the head can be increased without increasing the shape of the head. The size is easy to handle, and the function of the head can be improved.

[0008] The putter head for golf of the present invention preferably has a head weight of 280 g to 350 g, more preferably 310 g to 350 g.
340 g is most preferred. This increases the club length to 33
This is because when the length is from inch to 36 inches, the weight is the easiest to swing. Also, by using a metal material having a low specific gravity for the head main body 1, the weights of the weights 7, 8 having a high specific gravity are reduced by 6 on the toe 4 side and the heel 5 side, respectively.
It is preferable because the weight can be as heavy as 0 g to 130 g. In particular, when an aluminum alloy or a magnesium alloy is used for the head body 1, the weights of the weights 7 and 8 can be made as heavy as 80 g to 120 g and the moment of inertia around the center of gravity axis can be increased. .

The metal material used for the weights 7, 8 is as follows:
A metal material having a specific gravity of 10 or more, which is higher than stainless steel or a copper alloy, is preferable, a metal material of 12 to 19 or less, more preferably a metal material of 15 to 18 or less, and an alloy of a material such as tungsten or tantalum is preferable.

The golf putter head of the present invention is intended to produce a putter having excellent functionality and an easy-to-handle size by combining a metal material having a large specific gravity with a metal material having a small specific gravity. Length is 100mm
Is preferably not less than 110 mm and not more than 160 mm.
The width of the head is preferably 20 mm or more and 50 mm or less, particularly preferably 25 mm or more and 30 mm or less. In particular, it is preferable to have convex weight portions 7 and 8 on the toe 4 side and the heel 5 side and to form the concave portion 9 in the middle portion in the longitudinal direction, so that the moment of inertia around the left and right center axes is increased, which is preferable. A pin-shaped putter head is preferred.
The recess 9 is located on the back of the face and has a depth of 0.5 to
It is preferably 7.0 mm. If the surface is too deep, not only the face becomes thinner, but the shot feeling becomes worse, and if the surface is too thin, there is not much effect.

In the golf putter head of the present invention, the weight portion 7 having a large specific gravity,
It is preferable to form the groove 10 at the boundary between the metal used for the head main body 1 having a specific gravity as small as 8 and the groove 10.
The provision of the groove 10 has the effect of making the joint between the metal having a large specific gravity and the metal having a small specific gravity look clear (without feeling minute gaps) and eliminates discomfort such as differences in gloss and color. . This groove 10 is not very large, and has a width of 0.5 to 1.5 mm and a depth of 0.5 to 1.0.
mm.

Protrusions 11 for fitting and fixing weights 7 and 8 having a large specific gravity are provided on both sides on the back side of the blade 6 of the head main body 1, and the blades 6 are attached to the weights 7 and 8.
Grooves 7A and 8A are provided so as to be fitted to the protrusions 11 on the back surface of the. The grooves 7A and 8A are fitted to the protrusion 11 by sliding. Further, a method of fixing with an adhesive after fitting is preferable because it is simple in process and beautifully finished.
As a fixing method, a method of press-fitting the head main body 1 or a method of caulking or screw fixing may be used. At least, the joint between the weights 7 and 8 of the head body 1 is precisely machined by machining, and similarly, the joint between the weights 7 and 8 and the head body 1 is also machined so that By precisely forming the surface and the groove portions 7A, 8A and the projection 11, a gap is hardly generated between the fitted and abutted surfaces, which is preferable. The use of an adhesive is very preferable because it acts not only as a lubricant but also as a lubricant at the time of fitting.

The putter head for golf of the present invention uses duralumin 7075 for the head main body 1, uses tungsten-nickel having a specific gravity of 10 for the weights 7 and 8, and uses a block machine of each metal by an NC machine. The shape is cut out by processing, and a projection 11 as shown in FIG. 2 to FIG.
The portion that comes into contact with the head body 1 has the protrusion 11
The grooves 7A and 8A were formed so as to fit into the head, and an epoxy-based adhesive was applied to the contact surface of the head main body 1 and the protrusions 11 and slid and attached. Compared to electrodeposition and press-fitting, the manufacturing method was easier and could be easily attached.

As shown in FIG. 5, the shape of a golf putter head according to the present invention has a head length of 114 mm.
The head width was 28.5 mm and the neck length was 50 mm. The neck sectional area is 72 mm ² , the head mass is 332 g, the weights 7 and 8 are made of a tungsten alloy having a specific gravity of 17.8, and the masses of the weights are respectively on the toe 4 side and the heel 5 side. 112 g and 108 g. Further, the depth of the concave portion 9 formed at the position on the back surface of the face 20 provided between the weight portion 7 on the toe 4 side and the weight portion 8 on the heel 5 side was 6.0 mm. By forming the groove 10, a slight gap between the head main body 1 and the weights 7, 8 became inconspicuous, and it was possible to finish finely. When the weights 7 and 8 are fitted to the head body 1, steps are formed on the head body 1 abutting portions of the weights 7 and 8 so that the grooves 10 having a width of 1 mm and a depth of 0.8 mm are formed. Was provided. With respect to the putter head of the present invention, the pin type putter of the comparative example and the inertia moment IY around the center of gravity axis were measured and compared. Table 1 shows the results.

[0015]

[Table 1]

As shown in Table 1 above, in this embodiment, although the head weight was about 3% lighter than the comparative example, the moment of inertia around the center of gravity of the head was increased by about 15%, and A golf putter head that does not affect rolling even when shot can be obtained.

[0017]

According to the putter head for golf of the present invention, a material having a low specific gravity and a material having a high specific gravity are combined even in a putter head having a neck portion.
A golf putter head having a high degree of design freedom can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is a perspective view.

FIG. 2 is a rear view of the head main body.

FIG. 3 is a side view of the head main body.

FIG. 4 is a plan view of a head main body.

FIG. 5 is a front view of a head main body.

FIG. 6 is an end view taken along line AA of FIG. 5;

FIG. 7 is a view of the toe-side weight portion as viewed from the back surface side.

FIG. 8 is a plan view of a toe-side weight portion.

FIG. 9 is a right side view of FIG. 7 of the toe-side weight portion.

FIG. 10 is a view seen from the back side of a heel-side weight portion.

FIG. 11 is a plan view of a heel-side weight portion.

FIG. 12 is a left side view of the heel-side weight portion in FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head main body part 2 Hosel part 3 Neck part 4 Toe 5 Heel 6 Blade part 7,8 Weight part 9 Concave part 10 Groove part 20 Face part 21 Sole part

Claims (5)

[Claims] 1. A substantially flat face portion for hitting a golf ball, a sole portion in contact with the ground, a blade portion extending from the toe side to the heel side at an upper end portion of the face portion, and formed behind the same. And a golf putter head having a hosel portion for fixing a shaft and a neck portion connecting the hosel portion and the head body portion, the head body portion having a specific gravity of 5.0 or less. Formed of metal material,
Weight portions made of a metal material having a specific gravity of 10 or more are provided at least on the toe side and the heel side behind the blade portion of the head body portion, and these weight portions expose the upper surface, the sole surface, and the side surfaces. A putter head for golf provided on the toe side and the heel side of a portion. 2. The putter head for golf according to claim 1, wherein the head main body is formed of a metal material having a specific gravity of 3.0 or less. 3. The golf putter head according to claim 1, wherein a groove is formed at a boundary between the head body and the weight. 4. A recess is formed in an upper surface formed behind the blade portion of the head main body portion at a position substantially intermediate between the toe portion and the heel portion, and projections are provided on the toe side and the heel side. The putter head for golf according to any one of claims 1 to 3, wherein the protruding portion is formed by a weight portion. 5. A protruding portion is provided on a back portion of a blade portion of the head body portion, a groove portion is provided at a position abutting on a back surface of the blade portion of the weight portion, and the weight portion is fitted to the protruding portion. The putter head for golf according to any one of claims 1 to 4, wherein the golf club head is fitted by sliding.