JP2002204841A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head which has a good repulsion of balls and a wide sweet spot, is light in weight and is easy to swing through. SOLUTION: This golf club head has a head body which is formed of metal, such as titanium alloy, and consists of a head body rear 11 of a hollow form opened with a clubface mounting section 14 and a clubface member 10 fixed to the clubface mounting section 14. The golf club head has an elastic plate 40 of an elongated plate material curved in contact with the inside surface of the clubface member 10 across the heel and toe of the head body rear 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal wood golf club head having a metal shell.

[0002]

2. Description of the Related Art A conventional so-called metal wood is obtained by welding a shaft mounting pipe and a face member of a metal plate to a rear portion of a golf club head body obtained by integrally welding a metal shell piece obtained by dividing a sole portion and a crown portion into two pieces. Met. Further, there has been proposed a golf club head in which a rear portion is integrally formed by plastic working or casting, and a shaft mounting pipe and a face member made of a metal plate are welded to the front opening.

[0003]

In the case of the above-mentioned prior art, if the sweet spot of the face member is increased by enlarging the golf club head, the weight of the constituent members increases, and the moment of inertia of the head increases. It was difficult to swing out and the head speed was reduced. Therefore, it is desired to reduce the thickness of each member for weight reduction, but there is a limit in reducing the thickness in terms of strength. Further, in order to extend the flight distance of the ball, the resilience of the face member may be increased, and the resilience is improved by reducing the thickness of the face member, but there is a problem in strength as described above.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a golf club head having good resilience of a ball, a wide sweet spot, light weight and easy swinging. And

[0005]

According to the present invention, there is provided a head body rear portion formed of a metal such as a titanium alloy and having a hollow face face mounting portion opened, and a face face member fixed to the face face mounting portion. A head body consisting of
A golf club head having a shaft mounting pipe fixed in the head main body, the elastic member being a thin plate-shaped elastic member which straddles between a heel and a toe at a rear portion of the head main body and is in contact with an inner surface of the face surface member. This is a golf club head provided with a certain elastic plate.

Further, the face member, the head body and the elastic plate are made of various titanium alloys such as β-type titanium. The thickness of the rear portion of the head main body and the thickness of the elastic plate are smaller than those of the face surface member, and the thickness of each portion is substantially equal.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show a golf club head according to an embodiment of the present invention. The golf club head according to this embodiment has a hollow head body 12 comprising a face member 10 for hitting a ball and a head body rear portion 11. Is provided. The face member 10 has a plurality of shallow grooves 10a formed on its front surface and, if necessary, on its back surface to increase the repulsion and rigidity. Face surface member 1
Numeral 0 is integrally welded along the face surface mounting portion 14 of the rear portion 11 of the head main body. A silencing material 16 such as a silicone resin is applied to the inner surface of the head body 12.

The rear portion 11 of the head main body has a flat upper surface portion 20 curved so as to swell slightly upward, and a sole portion 2.
2a and side peripheral portion 22b are integrally formed with side peripheral bottom portion 2
2, the upper surface portion 20 and the peripheral edge portion of the side peripheral bottom surface portion 22 are joined together and welded to form a welded portion 30.
The rear part 11 of the head main body includes a pipe 2 for attaching a shaft.
4 are integrally welded. Shaft mounting pipe 2
4, the lower end 24a is welded to the sole portion 22a or a peripheral side portion 22b around the sole portion 22a. The side surface portion 24b of the shaft mounting pipe 24 is welded to the heel side peripheral portion 22b of the head main body rear portion 11,
A weld 32 is formed. The shaft mounting pipe 2 is provided at the shaft mounting position of the upper surface portion 20 and the side peripheral bottom surface portion 22.
Four neck ends 24c are welded. The shaft mounting pipe 24 is formed by hollowing out a titanium rod. The lower end 24a is formed in a solid shape, the pipe is formed partway, and a through hole 24d is formed in the side surface of the lower end 24a.
Are formed and communicate with the pipe-shaped interior. And
A shaft 26 is fitted to and adhered to the shaft mounting pipe 24 to form a golf club.

Here, since the face member 10 is a portion that hits a ball and requires high strength and strong resilience, the face member 10 is made of various types of titanium alloys such as β-type titanium and other cobalt titanium. It is formed to a thickness of, for example, about 2.4 mm within a range of 0 to 2.8 mm. The rear portion 11 of the head main body is formed of various types of β-type titanium having a thickness of, for example, about 1.2 mm in a range of 1.0 to 1.7 mm in order to reduce the weight of the head main body and position the center of gravity deep. . As the β-type titanium alloy, Ti-22V-4Al alloy is preferable, and further, Ti-13V-11Cr-3Al alloy, Ti-11.5Mo-6Zr
-4.5Sn alloy, Ti-15Mo-3Cr-3Sn-3Al, etc., and other titanium alloys may be used, which can be appropriately adopted according to the performance. The shaft mounting pipe 24 is formed of α-type titanium which is easy to process.

In the head body 12, a rear part 1 of the head body is provided.
A thin plate-like elastic plate 40 that straddles between the heel and the toe 1 and that is in contact with the inner surface of the face member 10 is provided. The elastic plate 40 is curved in an arc shape in the plate thickness direction, and its both ends 40 a
Are welded to the heel of the side peripheral portion 22b and the inner surface of the toe.
The outer surface of the central part of the elastic plate 40 is the face surface member 1.
0 is welded or in contact with the inner surface. The elastic plate 40 is formed of various types of β-type titanium having a thickness of, for example, about 1.2 mm in a range of 1.0 to 1.7 mm, similarly to the head main body rear portion 11.

The volume of the golf club head of this embodiment is formed in an appropriate volume within a range of 300 to 400 cm 3. For example, a volume of 320 to 340 cm 3 is preferable in consideration of ease of swinging and the size of the sweet spot. In particular, when emphasizing the head speed, a volume of about 330 cm 3 is preferable in consideration of air resistance and weight,
330-380
A volume of cm3 is preferred.

In this method of manufacturing a golf club head, first, the face member 10 made of a titanium alloy is forged in a cold or hot state and plastically deformed to form a predetermined curved shape. 10a is formed. Forging method,
An appropriate method that is easy to process may be selected, and either hot forging or cold forging may be used. In the case of hot forging, workability is good and it is easy to form a desired shape. Further, in the case of cold forging, the tough face member 10 having a dense metal structure can be obtained. Further, the upper surface portion 20 and the side peripheral bottom portion 22
Are forged into respective predetermined shapes and formed. Thereafter, the shaft mounting pipe 24 is welded to the side peripheral portion 22b at the position of the neck portion of the head main body rear portion 11. At the time of welding, while being fixed with a jig (not shown), the side surface portion 24b and the side peripheral portion 22b of the shaft mounting pipe 24 are accurately positioned and welded. The head body rear portion 11 may be integrally formed by casting.

Before or after welding the face member 10 to the rear portion 11 of the head main body, the elastic plate 40 is connected to the side peripheral portion 2.
2b. The center of the elastic plate 40 is also welded to the inner surface of the face member 10. The central portion of the elastic plate 40 only needs to be in contact with the face surface member 10, and may be welded as needed.

Further, the upper surface portion 20 is welded to the side peripheral bottom surface portion 22, and the face surface member 10 is welded to the face surface mounting portion 14 of the rear portion 11 of the head main body. At this time, the lower end of the face surface member 14 is attached so as to be fitted inside the sole portion of the side peripheral bottom surface portion 22, and the loft angle and the face angle are adjusted by the position of the face surface member 10. In the welding, the front and back portions of the side peripheral surface of the face surface member 10 are welded to the side peripheral bottom surface portion 22 to form a welded portion 34. These weldings can be appropriately selected, such as laser welding or electron beam welding.

After the face member 10 of the head body 12 is welded, a silencing material such as silicone resin is adhered to the inner surface of the golf club head. The silencing material is in a state before being dissolved and hardened in a solvent, and is used for the shaft mounting pipe 2.
4 and then into the interior of the golf club head through the through hole 24d of the tip 24a. Then, before the silencing material is cured, the golf club head is applied to the inner surface of the head main body 12, and the applied thickness is adjusted by rotating or swinging the golf club head, so that the golf club head is set at a desired center of gravity position. To do. Thereafter, the shaft 26 is inserted into the shaft mounting pipe 24 and fixed with an adhesive or the like.

In the golf club head of this embodiment, the center portion of the curved elastic plate 40 abuts against the back surface of the face member 10 to reinforce the face member 10, so that the face member 10 is thinly elastically resilient. The golf club head can be formed of a material having good properties, and the resilience of the face surface of the golf club head is enhanced. Further, since the elastic plate 40 is formed of the same member as the rear portion 11 of the head main body, the material can be used also, which contributes to cost reduction.

The rear portion 11 of the head main body is made of various kinds of β-type titanium having a relatively small thickness and a high strength. Since the thickness of each portion is substantially equal, the position of the center of gravity is relatively high. , The blow-up of the ball is prevented, and the trajectory can be drawn with a more ideal parabola to extend the flight distance. Furthermore, since the face member 10 is reinforced by the elastic plate 40, the volume of the golf club head can be increased to about 300 to 400 cm3,
By making the face member 10 large and thin, it is possible to expand the sweet spot, and it is possible to suppress an increase in the overall weight, thereby enabling a stable shot.
The flight distance of the hit ball can be extended. When the volume of the golf club head exceeds the above upper limit, the sweet spot expands, but the air resistance during the swing increases, the head speed decreases, and the flight distance of the ball does not increase.

The golf club head of the present invention is not limited to the above embodiment, and the elastic member may have any shape, such as a wire-like member, in addition to the elastic plate. Further, the present invention can be applied to a golf club head having an appropriate structure, such as one in which a head main body is integrally formed of titanium or a titanium alloy, one in which a face surface member and a shaft mounting pipe portion are integrally provided, and the like. . Further, the shape of the elastic member can be appropriately set, and a cantilever structure in which one side of the heel or toe abuts on the face surface may be used.

[0019]

According to the golf club head of the present invention, the thickness of the face member can be reduced without increasing the weight of the golf club head, and the resilience and sweet spot of the ball can be increased. This allows
It is possible to obtain a stable directionality of the hit ball and a long flight distance.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of one embodiment of a golf club head of the present invention.

FIG. 2 is a perspective view of the golf club head of this embodiment.

FIG. 3 is a longitudinal sectional view of the golf club head of this embodiment.

FIG. 4 is a cross-sectional view of the golf club head of this embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Face surface member 11 Head main body rear part 12 Head main body 14 Face surface mounting part 20 Top surface part 22 Side peripheral bottom surface part 22a Sole part 22b Side peripheral part 24 Shaft mounting pipe 26 Shaft 40 Elastic plate

Claims (3)

[Claims] 1. A head mounting body comprising: a head main body comprising a hollow main body having an opening at a face surface mounting portion, and a face surface member fixed to the face surface mounting portion; and a shaft mounting fixed within the head main body. A golf club head having a pipe for use, wherein an elastic member is provided between the heel and the toe at the rear portion of the head main body and in contact with the inner surface of the face member. 2. The golf club head according to claim 1, wherein said face member, said head body and said elastic member are formed of various titanium alloys. 3. The head member according to claim 1, wherein a thickness of the rear portion of the head main body and the thickness of the elastic member are smaller than that of the face member, and the thickness of each portion is substantially equal. Golf club head.