JP2000237358A - Golf club head - Google Patents

Abstract

(57) Abstract: The present invention relates to a golf club head, and an object of the present invention is to provide a golf club head in which a reliable welding strength between a head body and a face plate is secured without losing design weight distribution. I do. SOLUTION: The invention according to claim 1 is characterized in that a hollow side main body formed of a metal outer shell has a face side opening,
In a golf club head to which a metal face plate is welded, a recess is provided inside the welded portion between the face side opening of the head body and the face plate, in which a welding material is accumulated.

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.

[0002]

2. Description of the Related Art Conventionally, in golf club heads such as wood, the outer shell of a head body having an opening on the face side is formed hollow with a metal material such as a titanium alloy, and a titanium alloy or the like is formed in the opening on the face side. Although the face plate formed of the above metal material is welded, the head body and the face plate tend to be thinner as the size of the golf club head increases.

[0003] Therefore, in recent years, when the face plate is welded to the head main body, the welding strength is secured by forming a back bead by forming a thick weld material inside the welded portion between the head main body and the face plate. I have.

However, if the back bead is formed by thickly depositing the welding material inside the welded portion, the peripheral portion of the face of the golf club head becomes heavy, so that the weight distribution in the design is lost and the golf club is not balanced. It was pointed out that it would be difficult to remove. Also, Japanese Patent Application Laid-Open No. 8-294
No. 550 discloses that a welding material 5 is provided on a peripheral portion 4 of a face side opening 3 of a hollow head main body 1 as shown in FIGS.
A golf club head 11 is disclosed in which a recess 7 is formed in which a head plate 13 is welded and a face plate 9 is welded to the head main body 1. On the other hand, Japanese Patent Application Laid-Open No. 9-28842 discloses a golf club head 11 as shown in FIG. The peripheral edge 17 of the side opening 15 is bent inward, and a welding bead 23 of the welding material 5 is formed in a peripheral groove 21 formed by the peripheral edge 17 and the face plate 19, thereby forming a face plate. 19
Is welded to the head body 13 to disclose a golf club head 25.

Accordingly, these golf club heads 1
According to Nos. 1 and 25, welding work was facilitated, and there was no variation in welding strength, and uniform quality was achieved.

[0006]

However, in these conventional examples, the face side openings 3, 1 of the head bodies 1, 13 are provided.
Since the peripheral portions 4 and 17 of the golf club heads 5 and 5 are simply bent inward to provide a weld pool, when the face plates 9 and 19 are welded, the face peripheral portions of the golf club heads 11 and 25 similarly become heavy. There was a disadvantage.

[0007] When the face peripheral portion becomes heavy, the weight distribution in the design is broken as described above, and the center of gravity moves to the front side of the golf club head. It is pointed out that the golf club is difficult to climb. Further, in these conventional examples, the back beads are not formed inside the welded portions between the head bodies 1 and 13 and the face plates 9 and 19, and the golf club heads 11 and 12 are finished.
When the surface of 5 is polished, there is a possibility that a reliable welding strength cannot be ensured because the welding material 5 is scraped off.

The present invention has been devised in view of the above circumstances, and has as its object to provide a golf club head in which a reliable welding strength between a head body and a face plate is ensured without breaking design weight distribution. And

[0009]

In order to achieve the above object, a first aspect of the present invention is to provide a hollow head body formed of a metal outer shell with a metal face in an opening on the face side. In a golf club head with a welded plate,
A recess is provided inside the welded portion between the face side opening of the head main body and the face plate, in which a welding material is accumulated.

The invention according to claim 2 is based on claim 1.
In the golf club head according to the above aspect, the concave portion is provided along a peripheral edge of the face side opening of the head body, and the invention according to the third aspect is the golf club head according to the second aspect. Wherein the concave portion is provided in a sole portion of the head main body. According to a fourth aspect of the present invention, in the golf club head according to the third aspect, the sole portion excluding the recess is formed to be thicker than the face plate. In the golf club head according to any one of claims 1 to 4, the volume of the concave portion is formed larger than the volume of the welding material entering the concave portion.

(Function) According to the invention of each claim, the concave portion is provided inside the welded portion between the face side opening and the face plate, so that the face peripheral portion of the head main body is lightened in advance. Even if the face plate is welded, the face peripheral portion of the golf club head does not become heavy as in the related art.

The weld bead formed at the welded portion between the head body and the face plate securely connects the face plate and the head body, and even if the surface of the golf club head is polished during finishing, The back bead ensures a sufficient welding strength. According to the second, third, and fifth aspects of the present invention, by providing a recess along the periphery of the face-side opening of the head body, the face periphery of the head body can be reduced in weight in advance. Therefore, even when the face plate is welded, the face peripheral portion of the golf club head does not become heavy as in the related art.

Further, according to the invention of claim 4,
Since the sole portion is formed thicker than the face plate to reduce the center of gravity of the golf club head, the golf club head is easily returned when hit, and the hit ball rises higher.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 to 3 show a first embodiment of the golf club head according to the first to fifth aspects.
7 is a hosel part 29 and a sole part 31 made of titanium alloy.
And a head body composed of a hollow outer shell integrally formed with a top portion 33 and the like. The sole portion 31 and the top portion 33 are set to have a thickness of 5.0 mm and 1.0 mm, respectively, so that the center of gravity is reduced. It is planned.

Then, as shown in FIG.
A face plate 39 having a thickness of 3.0 mm made of a titanium alloy is welded to a face side opening 37 of the hosel part 29, and the face side is opened. The golf club head 41 is formed. The head body 27 and the face plate 39 are attached in the same manner as in the related art, after welding the peripheral edge of the face plate 39 to the peripheral edge of the face side opening 37 at several places and temporarily fixing the same to the head main body 27.
While pouring the welding material from the outside into the gap between the head main body 27 and the face plate 39, a welding bead 43 is formed at the welding portion as shown in FIG.
As shown in FIG. 7, in the present embodiment, the inclined portion 45 descending in the direction of the face side opening 37 is provided on the inner surface of the sole portion 31 along the face side opening 37 at a constant width, so that The inside of the face plate 39 is characterized in that a concave portion 47 is formed on the inner surface of the sole portion 31 where a welding material is accumulated and a back bead 43-1 is formed at the time of welding, and the volume of the concave portion 47 is It is formed larger than the volume of the welding material to enter.

The tip 48 of the inclined portion 45 has a length of 2.0 m.
The thickness M of the weld bead 43 is set to 20 mm or less, and the thickness M of the entire weld bead 43 is made thinner than the sole portion 31 excluding the concave portion 47. . In addition, in the figure, reference numeral 49 denotes a shaft inserted into the shaft hole 35. As described above, in the present embodiment, the concave portion 47 is provided on the inner surface of the sole portion 31 along the face side opening portion 37, so that the face peripheral portion of the head main body 27 is lightened in advance. Since the thickness M of the weld bead 43 to be formed is set to 20 mm or less, even if the face plate 39 is welded, the face peripheral portion of the golf club head 41 does not become heavy as in the related art.

A weld bead 43 formed at the welded portion between the head body 27 and the face plate 39 securely connects the face plate 39 and the head body 27. After welding, the golf club head is finished. Even if the surface of 41 is polished, the back bead 43-1 ensures a sufficient welding strength. Further, the present embodiment is different from the top portion 33 and the face plate 39 in the sole portion 3.
Since the golf club head 41 is formed with a large thickness to lower the center of gravity of the golf club head 41, the golf club head 41 can easily return when hitting a ball, and the hit ball rises higher.

In this embodiment, the tip 4 of the inclined portion 45
8 is 2.0 mm thick to reduce the area of the portion supporting the face plate 39 as much as possible, so that the area where the face plate 39 can repel at the time of hitting ball is widened, and the function of the face plate 39 is sufficiently exhibited. It will be.

Therefore, according to the present embodiment, the weight distribution in the design is not destroyed by the attachment of the face plate 39, and the center of gravity does not move to the front side of the golf club head 41. The sole portion 31 is made thicker than the top portion 33 so as to lower the center of gravity of the golf club head 41, so that it is possible to provide a well-balanced golf club that is easy to control.

In this embodiment, since the back bead 43-1 is formed at the welded portion between the head body 27 and the face plate 39, the golf club head 41 is finished.
Even if the surface is polished, a more reliable welding strength can be ensured as compared with the conventional example shown in FIGS. 5 to 7, and the tip 48 of the inclined portion 45 is made 2.0 mm thick to make the face plate 39 thicker. Is reduced as much as possible, so that the area of the area where the face plate 39 can repel at the time of hitting the ball is widened, and the function of the face plate 39 can be sufficiently exhibited.

The thickness of the sole portion 31 may be about 1.5 mm, which is thinner than the face plate 39, and the tip 48 of the inclined portion 45 may be 1.0 mm or less. FIG. 4 shows a second embodiment of the golf club head according to the first to fifth aspects. In the figure, reference numeral 51 denotes a hollow part in which a hosel part 53, a sole part 55, a top part 57, and the like are integrally formed of a titanium alloy. In the head main body composed of an outer shell, the sole portion 55 and the top portion 57 have a thickness of 2.5 mm and 1.0 mm, respectively, to achieve a low center of gravity.

Like the head main body 27, the head main body 51 of this embodiment also has a shaft hole (not shown) and an opening on the face side.
A 3.0 mm thick face plate 61 made of a titanium alloy is welded to the hollow golf club head 6.
2 are formed.

In this embodiment, the head body 51 and the face plate 61 are attached by welding the periphery of the face plate 61 to the periphery of the face side opening 59 at several places. After temporarily fixing the welding bead 51, the welding material is poured into the gap between the head main body 51 and the face plate 61 from outside thereof, and the welding bead 6 is formed in the welded portion.
3 is performed, and as shown in FIG.
By providing the step portion 65 on the inner surface of the sole portion 55 along the face side opening portion 59, the welding material is accumulated on the inner surface of the sole portion 55 due to the step portion 65 and the inside of the face plate 61, and the back bead 63-1 is formed. The recess 67 is formed with a constant width, and the volume of the recess 67 is larger than the volume of the welding material entering the recess 67.

The recess 67 has a thickness of 1.0 mm.
The thickness N of the weld bead 63 to be formed is set to 20 mm or less, and the thickness N of the entire weld bead 63 is thinner than the sole portion 55 excluding the concave portion 67. Since the present embodiment is configured as described above, similarly to the first embodiment, even if the face plate 61 is welded to the head body 51, the face peripheral portion of the golf club head 62 becomes heavy as in the related art. There is no.

A weld bead 63 formed at the welded portion between the head body 51 and the face plate 61 reliably connects the face plate 61 and the head body 51, and also provides a golf club head for finishing after welding. Even if the surface of 62 is polished, the back bead 63-1 ensures a sufficient welding strength. Also, in the present embodiment, the sole portion 5 has a larger thickness than the top portion 57 and the face plate 61.
Since the thickness of 5 is formed to lower the center of gravity of the golf club head 62, the golf club head 62 can easily return when hit, and the hit ball rises higher.

Therefore, according to the present embodiment, the weight distribution in design is not destroyed by the attachment of the face plate 61, and the center of gravity does not move to the front side of the golf club head 62. The sole portion 55 is made thicker than the top portion 57 so as to lower the center of gravity of the golf club head 62, so that it is possible to provide a well-balanced golf club that is easy to control.

Further, since the back bead 63-1 is formed at the welded portion between the head main body 51 and the face plate 61, even if the surface of the golf club head 62 is polished for finishing, FIGS. As compared with the conventional example shown in FIG. 1, a reliable welding strength can be ensured, and the area of the portion for supporting the face plate 61 is reduced as much as possible. It has an excellent effect that the function of the plate 61 can be sufficiently exhibited.

In each of the above embodiments, the concave portion is provided on the sole portion along the opening on the face side of the head main body. However, the concave portion may be provided on the top portion, the toe portion, the heel portion, and the like of the head main body. The concave portion may be provided continuously or intermittently along the face side opening along the entire periphery of the face side opening.

[0030]

As described above, according to the golf club head according to each of the claims, the weight distribution in design is lost due to the attachment of the face plate, and the center of gravity does not move to the front side of the golf club head. It has become possible to provide a well-balanced and easily controlled golf club.

According to these inventions, since the back bead is formed at the welded portion between the head body and the face plate, even if the surface of the golf club head is polished in finishing, a reliable welding strength can be obtained. Has the advantage that it can be secured. According to the fourth aspect of the invention, the center of gravity of the golf club head can be reduced.

[Brief description of the drawings]

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

FIG. 2 is an exploded perspective view of the golf club head shown in FIG.

FIG. 3 is a sectional view of the golf club head shown in FIG. 1;

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

FIG. 5 is a sectional view of a conventional golf club head.

FIG. 6 is a sectional view of a main part of the golf club head shown in FIG. 5;

FIG. 7 is a sectional view of a main part of another conventional golf club head.

[Explanation of symbols]

 27, 51 Head body 31, 55 Sole part 37, 59 Face side opening part 39, 61 Face plate 41, 62 Golf club head 43, 63 Weld bead 43-1, 63-1 Back bead 45 Inclined part 47, 67 Recess 65 Step

Claims (5)

[Claims] 1. A golf club head in which a metal face plate is welded to a face side opening of a hollow head body formed of a metal outer shell, wherein the face side opening of the head body is A golf club head having a concave portion for storing a welding material inside a welded portion with a face plate. 2. The golf club head according to claim 1, wherein the recess is provided along a peripheral edge of the face side opening of the head body. 3. The golf club head according to claim 2, wherein the recess is provided in a sole portion of the head body. 4. The sole portion excluding the concave portion is formed thicker than the face plate.
The golf club head as described. 5. The golf club head according to claim 1, wherein a volume of the concave portion is larger than a volume of the welding material entering the concave portion.