JP7433636B2 - Golf club head and golf club head manufacturing method - Google Patents

Description

The present invention relates to a golf club head and a method for manufacturing a golf club head.

Conventionally, there has been known a technique for improving flight distance performance while keeping the CT value within a specified range by providing resin on the inside of the face (for example, see Patent Document 1).

Patent No. 6581322

When resin is fixed to the inside of a golf club head, the hitting feel is different from that of a golf club head in which only metal is used for the face, and some batters may experience an uncomfortable feeling.

Therefore, the present invention has been made in view of these points, and provides a golf club that can provide a hitting feel similar to that of a golf club head whose face is made only of metal while maintaining flight distance performance. The purpose is to provide the head.

A golf club head according to a first aspect of the present invention includes a head body having a hollow interior, and a face made of titanium, titanium alloy, or aluminum, which is coupled to the head body and has a face surface for hitting a ball. , a face member made of at least one of aluminum alloy, magnesium, magnesium alloy, stainless steel, tungsten, and carbon; and a buffer member made of silver or gold joined to the head body side of the face member. , has.

A plurality of the buffer members may be provided at symmetrical positions with respect to the center position of the face member.

The buffer member may have a shape that as it approaches the center of the face member in the height direction of the golf club head, it moves away from the center of the face member in the left-right direction of the face member perpendicular to the height direction. good.

The buffer member may be provided in a region including a center position of the face member. Further, the CT value of the golf club head in a state where the buffer member is joined to the face member is smaller than the CT value of the golf club head in a state where the buffer member is not joined to the face member. good.

A method for manufacturing a golf club head according to a second aspect of the present invention includes a head body and at least one metal selected from titanium, titanium alloy, aluminum, aluminum alloy, magnesium, magnesium alloy, stainless steel, tungsten, and carbon. a step of preparing a face member to be configured; a step of joining a buffer member made of silver or gold to the head body side of the face member; and a step of attaching the face member to which the buffer member is joined to the head body. and a step of joining the part to the part.

According to the present invention, it is possible to maintain the flight distance performance of the golf club head while obtaining a hitting feel similar to that of a golf club head whose face is made of only metal.

1 is a diagram showing the appearance of a golf club head S. FIG. 3 is a diagram showing the structure of a face member 2. FIG. It is a figure showing the structure of face member 2 concerning a modification.

[Configuration of golf club head S]
FIG. 1 is a diagram showing the appearance of a golf club head S. As shown in FIG. FIG. 1(a) is an external view of the golf club head S when viewed from above, and FIG. 1(b) is an external view of the golf club head S when viewed from the front side.

The golf club head S has a hollow structure. The golf club head S includes a head body portion 1, a face member 2, and a buffer member 3.

The head main body part 1 is a part that hits a golf ball, and is hollow inside. The head body portion 1 is made of at least one of titanium, titanium alloy, aluminum, aluminum alloy, magnesium, magnesium alloy, stainless steel, tungsten, and carbon.

The head main body part 1 has a sole part 11, a connecting part 12, a neck part 13, and a crown part 14. The sole portion 11 forms the bottom surface of the head body portion 1.

The connecting portion 12 is a portion located above near the front end of the sole portion 11, which is connected to the upper end on the toe side and the upper end on the heel side of the sole portion 11. The connecting portion 12 is integrally formed with the sole portion 11.

The neck portion 13 is a portion to which a shaft of a golf club (not shown) is attached. The neck portion 13 has a cylindrical shape. The neck portion 13 extends substantially upward from near the heel side end of the connecting portion 12 .

The crown portion 14 has a smooth curved surface and forms the upper surface of the head body portion 1. The crown portion 14 is fixed to the edge of the hole formed by the upper edge of the sole portion 11 and the rear edge of the connecting portion 12 so as to close the hole.

The face member 2 is coupled to the head body portion 1. The face member 2 has a smooth curved surface and forms the front surface of the head body portion 1 . The face member 2 is fixed to the edge of the hole formed by the front edge of the sole portion 11 and the front edge of the connecting portion 12 so as to close the hole.

FIG. 2 is a diagram showing the structure of the face member 2. As shown in FIG. The face member 2 has a face surface 21 and a back surface 22. The face surface 21 is a region of the face member 2 where a golf ball is hit. The back surface 22 is a surface opposite to the face surface 21, and is a surface on the side of the head body 1 when the face member 2 is joined to the head body 1.

FIG. 2(a) is a diagram showing the configuration of the back surface 22 side of the face member 2. As shown in FIG. A plurality of buffer members 3 (buffer member 3R and buffer member 3L) are provided on the back surface 22. Details of the buffer member 3 will be described later.

FIG. 2(b) is a cross-sectional view taken along the line AA in FIG. 2(a). FIG. 2(c) is a cross-sectional view of the face member 2 without the buffer member 3. As shown in FIG. 2(c), the back surface 22 is formed with a recess 23R and a recess 23L in which the buffer member 3 is provided.

The face member 2 is made of a metal harder than silver, which is the metal constituting the buffer member 3, and is made of, for example, titanium, titanium alloy, aluminum, aluminum alloy, magnesium, magnesium alloy, stainless steel, tungsten, and carbon. consists of at least one of the following.

Incidentally, the repulsion performance of a golf club head is regulated by rules established by a predetermined organization that manages golf competitions (for example, R&A (Royal and Ancient Golf Club of St. Andrews)). If the repulsion performance of a golf club head exceeds the standard CT (Characteristic Time) value defined in the above rules, it will not comply with the rules and the golf club head cannot be used in golf competitions.

For example, depending on the thickness, shape, and material of the face member 2, the coefficient of restitution of the face surface 21 may increase and exceed the standard value defined in the above rules. Therefore, a buffer member 3 is provided on the back surface 22 so that the CT value of the golf club head S does not exceed the standard value even when the coefficient of restitution of the face member 2 is large.

The buffer member 3 is a plate-like member for alleviating the impact that the face member 2 receives when the face member 2 hits a golf ball. The buffer member 3 is joined to the head body portion 1 side (back surface 22) of the face member 2. In the example shown in FIG. 2, the buffer member 3 is welded with a welding material 4 while at least a portion thereof is accommodated in a recess 23 formed on the back surface 22.

The buffer member 3 is made of a metal that is softer and has a smaller coefficient of repulsion than the metal that constitutes the face member 2, and is made of, for example, gold or silver. By joining the back surface 22 of the face member 2 with a metal that is softer than the metal that constitutes the face member 2, even when the coefficient of restitution of the face member 2 is large, the CT value of the golf club head S can be maintained at the standard value. Can be done within.

Specifically, the CT value of the golf club head S in a state where the buffer member 3 is joined to the face member 2 is the CT value of the golf club head S in a state where the buffer member 3 is not joined to the face member 2 (for example, (a value greater than the standard value). By providing the buffer member 3 on the face member 2, the repulsion performance of the face member 2 is reduced and the amount of spin can be reduced, compared to the case where the buffer member 3 is not bonded to the back surface 22. Flight distance performance can be improved.

Further, since the buffer member 3 is made of metal, the hitting feeling when the batter G hits the ball with the golf club head S is different from the hitting feeling of a golf club whose back surface 22 is provided with resin, and The hitting feel is equivalent to that of a golf club without any provision at 22. Therefore, the golf club head S can improve flight distance performance while maintaining the feel of a golf club without the buffer member 3.

A plurality of buffer members 3 are provided at symmetrical positions with respect to the center position (sweet spot position) of the face member 2. By providing the buffer member 3 in this manner, the feel when the ball hits near the sweet spot is the same as when the buffer member 3 is not provided, and flight distance performance is improved. I can do it.

The buffer member 3 has a shape (for example, a V-shape) that moves away from the center of the face member 2 in the left-right direction of the face member 2 perpendicular to the height direction as it approaches the center of the face member 2 in the height direction of the golf club head S. has. With the buffer member 3 having such a shape, it becomes easy to configure the golf club head S so that the CT value falls within the standard value while expanding the area where the buffer member 3 is not provided on the back surface 22.

[Method for manufacturing golf club head S]
Next, a method for manufacturing the golf club head S will be explained. First, the head main body portion 1 and the face member 2 are prepared. Specifically, a head body 1 and a face member 2 made of at least one metal selected from titanium, titanium alloy, aluminum, aluminum alloy, magnesium, magnesium alloy, stainless steel, tungsten, and carbon are prepared. do. At this time, a face member 2 having a recess 23 formed at a position where the buffer member 3 is to be provided is prepared.

Subsequently, the buffer member 3 is joined to the face member 2 on the head body portion 1 side. Specifically, the buffer member 3 is joined to the face member 2 by brazing and welding with the buffer member 3 placed in the recess 23 . By setting the welding temperature to 1000 degrees or more, the face member 2 and the buffer member 3 can be bonded well, even if the face member 2 is made of titanium and the buffer member 3 is made of silver, for example.

Finally, the face member 2 to which the buffer member 3 has been joined is joined to the head body portion 1. Through the above steps, the golf club head S can be manufactured.

[Modified example]
FIG. 3 is a diagram showing the structure of a face member 2 according to a modified example. In the face member 2 shown in FIG. 2, the buffer member 3 is provided in an area that does not include the center position of the face member 2. On the other hand, in the face member 2 shown in FIG. 3, the buffer member 5 is provided at a position including the center position of the face member 2. Although the buffer member 5 shown in FIG. 3 has an oval shape, the buffer member 5 may be circular or polygonal.

Like the buffer member 3, the buffer member 5 is made of a metal that is softer and has a smaller coefficient of repulsion than the metal that constitutes the face member 2, and is made of, for example, gold or silver. By providing such a buffer member 5 at a position including the center position of the face member 2, it is possible to use a golf club head S whose CT value is within the standard value while increasing the coefficient of restitution of the face member 2 alone. The batter G who hits the ball can obtain a hitting feeling close to the hitting feeling when the buffer member 3 is not provided.

[Effects of golf club head S]
As explained above, the golf club head S according to the present embodiment has a face made of at least one of titanium, titanium alloy, aluminum, aluminum alloy, magnesium, magnesium alloy, stainless steel, tungsten, and carbon. It has a member 2 and a buffer member 3 made of silver or gold joined to the head body part 1 side of the face member 2. When the golf club head S has such a structure, it becomes possible to keep the CT value within the standard value while reducing the coefficient of restitution by making the face member 2 thinner, for example. Furthermore, since the buffer member 3 is made of metal such as silver or gold, the batter G who hits the ball using the golf club head S can have a hit that is close to the feel when the buffer member 3 is not provided. You can feel it.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes can be made within the scope of the gist. be. For example, all or part of the device can be functionally or physically distributed and integrated into arbitrary units. In addition, new embodiments created by arbitrary combinations of multiple embodiments are also included in the embodiments of the present invention. The effects of the new embodiment resulting from the combination have the effects of the original embodiment.

1 Head body part 2 Face member 3 Buffer member 4 Welding material 5 Buffer member 11 Sole part 12 Connection part 13 Neck part 14 Crown part 21 Face surface 22 Back surface 23 Recessed part

Claims (5)

A head body part that is hollow inside,
The head body is connected to the head body and has a face for hitting the ball, and is made of at least one of titanium, titanium alloy, aluminum, aluminum alloy, magnesium, magnesium alloy, stainless steel, tungsten, and carbon. a face member;
a silver or gold buffer member joined to the head body side of the face member;
has
In the golf club head , a plurality of the buffer members are provided at symmetrical positions with respect to the center position of the face member . The buffer member has a shape that as it approaches the center of the face member in the height direction of the golf club head, it moves away from the center of the face member in the left-right direction of the face member perpendicular to the height direction.
A golf club head according to claim 1 . The buffer member is provided in an area including a center position of the face member,
A golf club head according to claim 1. A CT value of the golf club head in a state where the buffer member is joined to the face member is smaller than a CT value of the golf club head in a state where the buffer member is not joined to the face member.
A golf club head according to any one of claims 1 to 3 . preparing a head body and a face member made of at least one metal selected from titanium, titanium alloy, aluminum, aluminum alloy, magnesium, magnesium alloy, stainless steel, tungsten, and carbon;
a step of joining a buffer member made of silver or gold to the head main body side of the face member;
joining the face member to which the buffer member is joined to the head main body;
has
A method for manufacturing a golf club head , wherein in the step of joining the buffer members, a plurality of the buffer members are joined at symmetrical positions with respect to the center position of the face member .

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