JPH09266964A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the operability of a golf club easier and to improve e the corrosion resistance of a golf club, by fixing a metallic member to be weight by welding in the inside of the main body. SOLUTION: In a metallic golf club with the hollow inside, a weight member 15 made of a material with the specific gravity larger than that of the material for the head main body 10 is fixed on a hollow part N side of a bottom wall part 11 by welding to form a sole face S of the head main body 10. This welding brings a structure that the metal welded to the head main body 10 heaps up from the bottom wall part 11 to cover the upper part of the weight member 15.

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 golf club head having a low center of gravity structure.

[0002]

2. Description of the Related Art As is well known, metal wood is gaining popularity because it has a longer flight distance and improved directionality than conventional wood wood.

Initially, stainless steel was the main material for the club head of this metal wood, but recently, titanium, titanium alloy, or aluminum such as duralumin, which is lightweight, has a strong repulsive force and is excellent in corrosion resistance, is also used. Alloys are often used.

As shown in FIG. 7, the club head comprises a face (ball striking face) shell piece a, a crown (upper surface) shell piece b, and a sole (ground surface) shell piece c, which are obtained by casting or forging metal as a raw material. It is manufactured by molding and then integrally welding these.

By the way, an appropriate weight and center of gravity are set in the club head depending on the type and length of the club. Generally, it is possible to improve swing-out of the club and to effectively transfer energy to the hit ball. A low center of gravity structure is adopted.

As to the metal wood, as a means for realizing the above-mentioned low center of gravity structure, when the above shell piece is manufactured by a lightweight metal such as an aluminum alloy, the hollow portion of the club head in the sole surface shell piece c is used. A weight member serving as a weight is fixed to the side.

[0007]

By the way, in the above-mentioned means, a weight member for adding a predetermined weight to the club head and setting the center of gravity is arranged, for example, in the hollow portion of the head body, and this weight member is placed. Although it is fixed by screwing from the sole surface side, there is a problem that the number of manufacturing steps increases and the processing cost increases because it is necessary to form a hole for inserting a screw in the sole surface shell piece or fix the weight member through the screw. Further, there is a problem that moisture enters from the sole surface side through the screw insertion hole to corrode the inside of the club head.

The present invention has been made in view of the above circumstances, and in place of the conventional screw fixing structure, a metal member serving as a weight is fixed to the inside of the head main body by welding, so It is an object of the present invention to provide a golf club head that is easy to manufacture and has excellent corrosion resistance.

[0009]

According to a first aspect of the present invention, there is provided a golf club head made of a metal having a hollow interior, wherein the metal member having a specific gravity larger than that of the material of the head body is the head body. Is fixed to the hollow portion side of the bottom wall portion forming the sole surface by welding, and the metal deposited by this welding rises from the bottom wall portion and covers the upper portion of the metal member.

In the golf club head according to the first aspect, the deposited metal deposited on the head body rises from the bottom wall portion and covers the upper portion of the metal member, and the metal member is held.

According to a second aspect of the present invention, there is provided a golf club head according to the first aspect, wherein the metal member of the golf club head according to the first aspect is at least close to the front wall portion forming the face surface and the toe side of the head body. The heel side portions are fixed to the bottom wall portion by welding.

According to another aspect of the golf club head of the present invention, of the metal member, the side portion adjacent to the front wall portion forming the face surface and the toe side and heel side portions of the head body are bottom walls. Since it is welded to the portion, the joint between the metal member and the head body is firmly held even at the time of impact.

According to a third aspect of the golf club head of the present invention, in the golf club head according to the first aspect, a recess is formed in the hollow portion of the bottom wall, and the metal member is provided in the recess. It is characterized in that it is fitted and the periphery of the metal member is fixed to the bottom wall portion by welding.

In the golf club head according to the third aspect of the present invention, since the metal member is fitted in the recess and then welded, the metal member is surrounded by the recess and is joined to the head body. Is held more firmly. Further, the metal member serving as the weight is arranged at a lower position.

According to a fourth aspect of the golf club head, the head body of the golf club head according to any one of the first, second and third aspects is formed of an aluminum alloy, and the weld metal is aluminum or an aluminum alloy. It is characterized by

In the golf club head according to the present invention, the head main body is made of an aluminum alloy, and the weld metal is made of aluminum or an aluminum alloy, so that the weld metal adheres well to the head body, and The club itself is lightened.

[0017]

DETAILED DESCRIPTION OF THE INVENTION A first embodiment of a golf club head according to the present invention will be described with reference to FIGS. The golf club head shown in FIG. 1 has a head body 10 in which a face shell piece 10a, a crown shell piece 10b, and a sole shell piece 10c made of an aluminum alloy such as duralumin are integrated by welding, and a weight arranged inside the head body 10. And a member (metal member) 15.

The head body 10 has a shape having a hollow portion N inside by combining a three-division type face shell piece 10a, a crown shell piece 10b, and a sole shell piece 10c. The face shell piece 10a has a face. A surface F is formed and a sole surface S is formed on the sole shell piece 10c.

The weight member 15 has a rectangular plate shape in plan view,
The head body 10 is made of brass having a larger specific gravity than the aluminum alloy, which is a material, and is fixed to the hollow portion N side of the bottom wall portion 11 of the head body 10 forming the sole surface S by welding.

In the welding, as shown in FIG. 2, a side portion 15a of the weight member 15 which is close to the front wall portion 12 of the head body 10 forming the face surface F and a corner of the side portion 15a are sandwiched. Adjacent side portions 15c and 15d, that is, the side portion 15c on the toe portion 13 side of the head body 10 and the heel portion 14
It is provided over three sides with the side portion 15d on the side.

Aluminum or an aluminum alloy is used as a filler material for welding, and the head body 10 is welded.
The weld metal 16 made of aluminum or aluminum alloy is welded to the head body 1 as shown in FIG.
0 from the bottom wall portion 11 to the side portions 15a of the weight member 15, 1
It is formed so as to rise upward along 5c and 15d and to cover the edge of the upper portion 15e of the weight member 15. Further, the weight member 15 has its side portions melted by heat during welding, and its cross section has a shape similar to an isosceles trapezoid. In this way, the weight member 15 is fixed to the bottom wall portion 11 by casting.

In the above golf club head, the weight of the club itself is reduced because the head body 10 is made of aluminum alloy, and the weight member made of brass having a larger specific gravity than the aluminum alloy is provided inside the head body 10. By arranging 15, the weight and the center of gravity of the club head are set appropriately.

The weight member 15 is welded to the side portion 15a particularly close to the face surface F, the side portion 15c on the toe portion 13 side of the head body 10, and the side portion 15d on the heel portion 14 side. The joint strength between the head body 10 and the weight member 15 is increased to counter the impact force that acts at the time of impact.

Further, the welded metal 16 made of aluminum or aluminum alloy covers the edge of the upper portion 15e of the weight member 15 with respect to the head body 10 made of aluminum alloy, and the weight member 15 is held. The joint between the portion 10a and the weight member 15 is made stronger.

Therefore, according to the above-mentioned golf club head, the weight member 15 can be firmly fixed without employing the screw fixing structure as in the conventional case, so that the manufacturing process is simplified as compared with the conventional case. be able to. Moreover, since it is not necessary to provide a hole for inserting a screw, the inside of the club head is not corroded.

In this embodiment, the head body 10 has a three-part structure, but the present invention is not limited to this structure. Further, although the brass piece is used as the weight member 15, other kinds of metal pieces may be used.

Further, in the present embodiment, the three sides of the side portions 15a, 15c, 15d of the weight member 15 are welded, but the weight member 15 is taken into consideration in consideration of welding cost and work man-hours. It is also possible to further increase the joint strength between the bottom wall portion 10a and the weight member 15 by welding the entire periphery thereof.

Next, a second embodiment of the golf club head according to the present invention will be described with reference to FIGS.
The golf club head of the present embodiment is different from that of the first embodiment, as shown in FIG.
5, a recess H is formed in the bottom wall portion 21 of the head member 21 in accordance with the planar shape of the weight member 25, and the weight member 25 is fitted in the recess H. As shown in FIG. Both side portions 25c, 25d adjacent to the side portion 25a of the weight member 25 adjacent to the front wall portion 22 of 20 with a corner therebetween,
That is, the side portion 25c on the toe portion 23 side of the head body 20,
This is a point provided on two sides of the side portion 25d on the heel portion 24 side.

As shown in FIG. 6, the deposited metal 26 swells upward from the bottom wall portion 21 while accumulating in the gaps between the side portions 25c and 25d of the weight member 25 and the recess H, and on the upper portion 25e of the weight member 25. It is formed in a covered state.

In the golf club head described above, like the golf club head of the first embodiment, the weight of the club itself is reduced, and the weight and center of gravity of the club head are set appropriately.

Further, since the weight member 25 is fitted in the recess H and two sides 25c and 25d which are adjacent to each other with a corner therebetween are welded to the side 25a close to the face surface F, the impact is obtained. The joint strength between the head body 20 and the weight member 25 is further increased to counter the impact force that sometimes acts.

Since the weight member 25 serving as a weight is arranged at a lower position, the center of gravity of the club head is further lowered.

Therefore, according to the above golf club head, the same effects as those of the golf club head of the first embodiment can be obtained, and in addition, the joint strength between the head body 20 and the weight member 25 can be enhanced, The center of gravity of the head can be lowered.

In the first and second embodiments, the weight member 15 (25) is attached to the head main body 10 (2).
Although it is fixed to 0) by welding, it may be fixed by brazing welding.

[0035]

As described above, according to the golf club head of the first aspect, the weld metal for fixing the metal member rises from the bottom wall portion of the head body and covers the upper portion of the metal member. Since the metal member is held, the metal member can be more firmly bonded to the head body. That is, the metal member can be firmly fixed without using a structure for screwing the metal member, so that the manufacturing process can be simplified as compared with the conventional case.
Moreover, since it is not necessary to provide a hole for inserting a screw or the like, the inside of the club head is not corroded.

According to the golf club head described in claim 2, of the metal member, at least a side portion of the metal member adjacent to the front wall portion forming the face surface, a toe portion side portion of the head body, and a heel side. Since the side portions of the head body are welded to the bottom wall portion, the joint strength between the head main body and the metal member can be increased to counter the impact force that acts at the time of impact.

According to the golf club head of the third aspect, the metal member is fitted in the recess formed in the bottom wall, and the front and rear of the metal member which moves along the track of the club head during the swing are recessed. Since it is held in place, the joint strength between the head main body and the metal member can be further increased to counter the impact force that acts at the time of impact. Further, the weight of the club head can be further lowered by disposing a metal member serving as a weight at a lower position.

According to the golf club head of the present invention, the head main body is made of an aluminum alloy, and the weld metal made of aluminum or an aluminum alloy is used to firmly bond the head main body and the weld metal. At the same time, the weight of the club itself can be reduced.

[Brief description of drawings]

FIG. 1 is a cutaway perspective view showing a first embodiment of a golf club head according to the present invention.

2 is a cross-sectional view taken along the line I-I in FIG.

3 is a cross-sectional view taken along the line II-II in FIG.

FIG. 4 is a cutaway perspective view showing a second embodiment of the golf club head according to the present invention.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is an exploded perspective view showing an example of a conventional golf club head.

[Explanation of symbols]

 10 Head Body 11 Bottom Wall Part 12 Front Wall Part 13 Toe Part 14 Heel Part 15 Weight Member (Metal Member) 15a, 15c, 15d Side Part 16 Weld Metal F Face Surface S Sole Surface H Recess N Hollow Part

Claims (4)

[Claims] 1. In a golf club head made of a metal having a hollow inside, a metal member having a specific gravity larger than that of a material of the head body is welded to a hollow portion side of a bottom wall portion forming a sole surface of the head body. A golf club head, which is fixed and in which the metal deposited by welding rises from the bottom wall portion and covers the upper portion of the metal member. 2. The metal member has at least a side portion adjacent to a front wall portion forming a face surface, and a toe side and a heel side side portion of the head main body fixed to the bottom wall portion by welding. The golf club head according to claim 1, wherein: 3. A recess is formed on the hollow portion side of the bottom wall, the metal member is fitted in the recess, and the periphery of the metal member is fixed to the bottom wall by welding. The golf club head according to claim 1, wherein: 4. The head body is formed of an aluminum alloy, and the deposited metal is made of aluminum or an aluminum alloy.
The golf club head according to any one of 1.