JP2001276284A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head at the neck of which distortion is hard to be generated at the time of welding, exhibits a high quality of accuracy such as the lie angle, the face angle, and the like, and exhibits a high durability. SOLUTION: A first external shell member 2 formed by casting is a member integrating a hosel 4 and a sole 5. The hosel 4 has a bolster 7 spreading like an umbrella at its midpoint in the direction of its length and the part lower than the bolster 7 is a cylindrical guide 9 integrally having a part of the heel wall of the head body. Wings 10 are protruded from the cylindrical guide 9. The first external shell member 2 and a second external shell member 3 formed by press molding are integrated by welding.

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 having a hollow metal shell structure generally called a metal head.

[0002]

2. Description of the Related Art Heretofore, as a golf club head having a hollow metal shell structure, for example, a golf club head manufactured by a precision casting method using a material such as stainless steel or an aluminum alloy is known. However, since this is a cast product, it has the advantage that it is easy to form a complicated shape with high accuracy, but on the other hand, segregation of molten metal components,
There are problems such as pinholes and other defects during casting that are likely to occur, and the mechanical strength tends to be low due to the large crystallinity of the deposited metal material, which results in the durability of the golf club head itself. In order to maintain the performance, it was necessary to increase the thickness of the outer shell itself constituting the head. As a result, since the mass of the head is increased, there is a disadvantage that the sweet spot cannot be enlarged by increasing the head volume.

[0003] In recent years, instead of a golf club head manufactured by the above-described casting method, a plurality of split shells formed by pressing or forging are formed, and these split shells are welded to each other. As a result, golf club heads integrated with each other have become common.

For example, Japanese Utility Model Publication No. 61-33970 discloses that
As shown in FIG. 4, the head body is
1, an upper shell part 32 provided with a half neck part 32a on one side,
And the sole shell part 33a and the other half neck part 33c
Is divided into three into a hollow body 33 having a side peripheral shell portion 33b, and a shaft mounting pipe 35 for connecting a shaft separately from these outer shell members is formed. The outer shell member and the shaft mounting pipe 35 are connected together. The one integrated by welding has been proposed and known. At the time of this fixing, the lower end of the shaft mounting pipe 35 abuts on the sole portion 33a of the outer shell member and is fixed by welding or the like.

In Japanese Patent Application Laid-Open No. Hei 6-327796, FIG.
As shown in the figure, a head body is formed on a face member 41, a head body member 42 formed in a container shape with an open upper surface, a crown member 43, and three outer shell members, and an end portion of the crown member 43. And a tubular neck member 44 having one end positioned in the head main body and having a flange portion 44a at an intermediate portion, and the above members are joined and integrated by welding. One has been proposed and is known. In these hitherto known golf club heads, since each member is formed by press working, there is an advantage that the thickness of the outer shell itself constituting the head body can be reduced and the head volume can be increased.

A feature of a head structure in which the lower end of the neck portion extends to the sole portion inside the hollow head and the extended portion is abutted and fixed to the sole portion is characterized by the fact that the neck portion extends. Since the structure is such that the portion extends inside the hollow head, the neck portion including the extension portion is formed as a member molded separately from the outer shell member for constituting the head, and these members are welded or the like. It is joined and integrated.

[0007]

However, these conventionally known golf club heads have the following problems. That is, as proposed in the former Japanese Utility Model Publication No. 61-33970 shown in FIG. 4, the outer shell members of the face shell 31, the upper shell 32, and the hollow body 33 have three members.
A shaft mounting pipe 35 for connecting a shaft separately from these outer shell members is formed, and these are joined and integrated by welding. In this case, the shaft mounting pipe 35 and the half Split neck 32a,
Because of the structure in which the entire head is welded integrally by welding 33c, distortion is likely to occur particularly in the welded portion of the hosel portion,
The golf club head has a problem in that the setting of the important lie angle and face angle is out of order.
Further, the welded portions are concentrated on the hosel portion, and the physical properties of the hosel portion may be deteriorated due to heat history.

FIG. 5 shows the latter JP-A-6-3277.
No. 96, three outer shell members of a face member 41, a head body member 42 formed in a container shape with an open upper surface, and a crown member 43;
3, a notched portion 43a formed at the end of the third body, one end of which is located in the head main body, and a tubular neck member 44 having a flange portion 44a at an intermediate portion is formed. In the jointed and integrated one, the neck member 44 is formed as a separate member from the outer shell member constituting the head main body, and as shown in FIG. Since welding is performed at the skirt portion, the welding operation is easier than when directly welded to the neck member 44. There was a possibility that physical properties might be deteriorated due to heat history. In particular, the collar 44
On the heel side where the extension length of a cannot be increased, since the welded portion is close to the neck portion, distortion is easily caused by heat during welding, and the neck member 44 bends and the shaft insertion hole is distorted. There is a possibility that there is a problem that it becomes difficult to insert the shaft.

The neck member 44 has two joining points with the outer shell member, namely, a lower end portion 44b and the flange portion 44a separated from the lower end portion 44b. The transmitted impact vibration at the time of hitting the ball is mixed and transmitted from the above-mentioned two places, and thus has a problem that the player feels uncomfortable hitting the ball.

Further, the neck member 44 is an independent member, and the lie angle, face angle, and the like are set when the sole portion of the outer shell member and the neck member 44 are integrated by welding, so that the accuracy of the combination varies. In addition, there is a problem that the welding process takes time in the manufacturing process and the manufacturing cost increases.

Accordingly, the present invention has been made in view of these conventional problems, and it is difficult to cause distortion in a neck portion at the time of welding, and without giving an unpleasant shot feeling to a player, accuracy of lie angle, face angle, etc. It is an object of the present invention to provide a highly durable golf club head.

[0012]

In order to achieve the above object, the present invention has the following arrangement. That is, the golf club head according to claim 1 of the present invention is formed by casting, a first outer shell member constituting a sole portion and a hosel portion of a head main body, and formed by forging or pressing, and A golf club head having a hollow metal shell structure integrated by welding in combination with a second shell member forming an outer shell region other than the outer shell portion and the hosel portion, wherein the first outer shell member is provided. The hosel portion has an umbrella-shaped flange portion welded and fixed to the heel-side upper end portion of the second outer shell member at an intermediate portion in the longitudinal direction, and has a heel portion of the head body below the flange portion. A cylindrical guide portion having a D-shaped cross section which forms a part of the wall, and a plate-like wing extending from the face side surface and / or the back side surface of the cylindrical guide portion in the same direction as the heel wall. Hoses with one piece And a lower portion, and a golf club head, wherein a lower end of the hosel lower portion is integrated with the sole portion.

According to a second aspect of the present invention, there is provided the golf club head according to the first aspect, wherein a heel side portion of the second outer shell member is provided below a hosel of the first outer shell member. And a notch part having substantially the same shape as the part, and a wing piece part provided below the hosel is combined with the notch part and integrated by welding.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
A preferred embodiment will be described with reference to FIGS. FIG.
1 is an explanatory perspective view of a golf club head according to one embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG. FIG. 3 shows A in FIG.
It is explanatory drawing showing the -A cross section. As shown in FIGS. 1 and 2, the golf club head 1 of the present invention welds a first outer shell member 2 and a second outer shell member 3 formed of a material made of titanium or a titanium alloy by welding. It is one that is integrated.

The first shell member 2 is formed by a lost wax casting method, and is a member in which the hosel portion 4 and the sole portion 5 of the golf club head 1 are integrally formed. The face angle is maintained, and the lower end of the hosel portion 4 is connected to the heel end of the sole portion 5 to be integrated. The second outer shell member 3 is formed by press working, and the face portion 1 of the golf club head 1 is formed.
1, a side wall forming a part of the back side part 14 and the heel part 15 from the crown part 12 and the toe part 13 is a plate-shaped member, and the hosel part 4 of the first outer shell member 2 The part to be combined has a notch part having substantially the same shape as the lower part of the hosel, and at the time of welding, each member is fixed to a predetermined position.

The hosel portion 4 of the first shell member 2
Is a cylindrical body having a shaft hole 6 to which a shaft is attached, and a flange portion 7 extending in an umbrella shape in the crown direction of the head is formed at an intermediate portion in the longitudinal direction. The collar 7
Is a portion to which the upper end portion of the second outer shell member 3 on the heel side abuts on its end face and is welded. With this flange, the welded portion is located away from the shaft hole 6.

The hosel part 4 is provided with the flange part 7.
Below, as shown in FIG. 3, it has the form of a cylindrical guide portion 9 having a D-shaped cross section integrally having a part of the heel wall 8 of the head main body. The shock vibration is transmitted to the shaft without dispersion.
In addition, the tubular guide portion 9 includes a plate-shaped wing piece portion 10 extending from the face side surface and the back side surface in the same direction as the heel wall, and an end face of the wing piece portion 10 is provided. The second outer shell member abuts and is welded, and the welded portion is located away from the shaft hole 6.

The golf club head 1 of the present invention is not limited to titanium or a titanium alloy, but can be applied to a case where a metal material such as steel, stainless steel, and aluminum alloy is used. Further, the golf club head 1 having the member configuration of the present embodiment is merely an example, and the second outer shell member 3 is divided into two parts in advance, a member forming the face portion 11 and a member forming the other portions, and separately. It can also be applied to a case where it is integrally formed after being formed into a single piece.

[0019]

As described above, in the golf club head of the present invention, the hosel portion and the sole portion constituting the first outer shell member formed by casting maintain the predetermined lie angle and face angle. As a result, it is connected and integrated at the heel end of the sole portion, and an effect is obtained that a predetermined angle can be obtained without adjusting the angle at the time of welding.

Further, the flange portion and the wing piece portion formed on the hosel portion constituting the first outer shell member make the welding portion with the second outer shell member a position away from the shaft hole.
This has the effect of reducing defects in the shaft hole due to welding heat.

Further, the golf club head of the present invention has a first
A cylindrical guide portion having a D-shaped cross section formed on the hosel portion constituting the outer shell member has a part of the heel wall of the head body integrally, so that the impact vibration at the time of hitting the ball transmitted from the head outer shell can be reduced. It is transmitted to the shaft without dispersing, preventing the player from feeling uncomfortable hitting.

Further, the second outer shell member has a cutout having a shape substantially the same as that of the lower portion of the hosel at a portion combined with the hosel portion of the first outer shell member. Each member has an effect of being fixed to a predetermined position without any trouble such as displacement.

[Brief description of the drawings]

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

FIG. 2 is an exploded perspective view of an embodiment of the golf club head according to the present invention.

FIG. 3 is an explanatory view showing an AA cross section in FIG. 2;

FIG. 4 is an exploded perspective view of a conventional golf club head.

FIG. 5 is an exploded perspective view of a conventional golf club head.

FIG. 6 is a cross-sectional view of a conventional golf club head.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 golf club head 2 first outer shell member 3 second outer shell member 4 hosel portion 5 sole portion 6 shaft hole 7 flange portion 8 heel wall 9 cylindrical guide portion 10 wing piece portion 11 face portion 12 crown portion 13 toe Part 14 Backside part 15 Heel part 31 Face shell part 32 Upper shell part 32a Half neck part on one side 33 Hollow body 33a Sole shell part 33b Side shell part 33c Half neck part on the other side 35 Shaft attachment pipe 41 Face Member 42 Head body member 43 Crown member 43a Notch portion 44 Neck member 44a Flange portion 44b Lower end portion

Claims (2)

[Claims] 1. A first outer shell member formed by casting and constituting a sole portion and a hosel portion of a head body, and an outer shell region formed by forging or press working other than the sole portion and the hosel portion. A golf club head having a hollow metal shell structure that is integrated by welding in combination with a second shell member that constitutes the golf club head, wherein the hosel portion that constitutes the first outer shell member has a longitudinal direction. An intermediate portion has an umbrella-shaped flange portion welded and fixed to the upper end portion on the heel side of the second outer shell member, and has a D-shaped cross section that forms a part of the heel wall of the head body below the flange portion. A hosel lower portion comprising: a tubular guide portion; and a plate-shaped wing portion extending from the face side surface and / or the back side surface of the tubular guide portion in the same direction as the heel wall. , And below the hosel A golf club head, wherein a lower end of the portion is integrated with a sole portion. 2. A heel-side portion of the second outer shell member has a notch having substantially the same shape as a lower portion of the hosel of the first outer shell member. The golf club head according to claim 1, wherein the wing pieces provided on the lower part are combined and integrated by welding.