Golf club head

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a metal wood golf club head composed of a metal outer shell.

【0002】

[Conventional technology]

In the conventional so-called metal wood, a shaft mounting pipe and a face surface member of a metal plate are welded to the rear part of a golf club head body in which a metal shell piece divided into a sole portion and a crown portion is integrally welded. It is also proposed that the rear part of the golf club head is integrally formed by plastic working, casting, or the like, and the shaft mounting pipe and the face surface member of the metal plate material are welded to the front opening.

【0003】

[Problems to be Solved by the Invention]

In the case of the above-mentioned conventional technique, when the golf club head is enlarged to widen the sweet spot of the face surface member, the weight of the constituent member becomes heavy, the moment of inertia of the head becomes large, it is difficult to swing out, and the head speed becomes high. It was something that would decrease. Therefore, it is desired to reduce the wall thickness of each member in order to reduce the weight, but there is a limit to the wall thickness reduction in terms of strength. Further, in order to extend the flight distance of the ball, the repulsive force of the face surface member may be increased, and the repulsiveness is improved by thinning the face surface member, but there is a problem in strength as described above.

【0004】

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a golf club head which has good ball resilience, has a wide sweet spot, is lightweight, and is easy to swing.

【0005】

[Means for solving problems]

The present invention includes a head body formed of a metal such as a titanium alloy, which is hollow and has a face surface mounting portion opened, and a head body including a face surface member fixed to the face surface mounting portion. A golf club head having a shaft mounting pipe fixed inside the main body, which is an elastic member of a thin plate material that straddles between the heel and the toe at the rear of the head body and is curved in contact with the inner surface of the face surface member. It is a golf club head provided with a board.

【0006】

Further, the face surface member, the head body, and the elastic plate are formed of various titanium alloys such as β-type titanium. The thickness of the rear part of the head body and the elastic plate is thinner than that of the face surface member, and the thickness of each part is formed to be substantially equal.

【0007】

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a golf club head according to an embodiment of the present invention. The golf club head according to this embodiment is a hollow head body 12 composed of a face surface member 10 for hitting a ball and a head body rear portion 11. To be equipped. A plurality of shallow grooves 10a are formed on the front surface of the face surface member 10 and, if necessary, on the back surface thereof to increase the repulsive force and rigidity. The face surface member 10 is integrally welded along the face surface mounting portion 14 of the rear portion 11 of the head body. Further, the inner surface of the head body 12 is coated with a sound deadening material 16 such as silicone resin.

【0008】

The rear portion 11 of the head body is composed of a flat upper surface portion 20 curved so as to bulge slightly upward, and a side peripheral bottom surface portion 22 in which the sole portion 22a and the side peripheral portion 22b are integrally formed. The peripheral edges of the side peripheral bottom surface 22 are aligned and welded to form the welded portion 30. A shaft mounting pipe 24 is integrally welded to the rear portion 11 of the head body. As shown in the figure, the lower end portion 24a of the shaft mounting pipe 24 is welded to the sole portion 22a or the side peripheral portion 22b around the sole portion 22a. The side surface portion 24b of the shaft mounting pipe 24 is welded to the side peripheral portion 22b on the heel side of the head body rear portion 11, to form the welded portion 32. The neck end portion 24c of the shaft mounting pipe 24 is welded to the shaft mounting positions of the upper surface portion 20 and the side peripheral bottom surface portion 22. The shaft mounting pipe 24 is formed by hollowing out a titanium rod, the lower end portion 24a is formed solidly, a pipe shape is formed halfway, and a through hole 24d is formed on the side surface of the lower end portion 24a. , Communicates with the pipe-shaped interior. Then, the shaft 26 is fitted and adhered to the shaft mounting pipe 24 to form a golf club.

【0009】

Here, since the face surface member 10 is a portion that hits a ball and is required to have high strength and strong resilience, it is formed of various β-type titanium which is a titanium alloy, other cobalt titanium, etc., and has a thickness of 2.0 to 2.8 mm. It is formed in a range having a thickness of, for example, about 2.4 mm. The rear portion 11 of the head body is formed of various β-type titanium having a thickness of, for example, about 1.2 mm in the range of 1.0 to 1.7 mm in order to reduce the weight of the head body and position the center of gravity deeply. As the β-type titanium alloy, Ti-22V-4Al alloy is preferable, and Ti-13V-11Cr-3Al alloy, Ti-11.5Mo-6Zr-4.5Sn alloy, Ti-15Mo-3Cr-3Sn-3Al, etc. may be used. , Other titanium alloys may be used, and can be appropriately adopted according to the performance. The shaft mounting pipe 24 is made of α-type titanium, which is easy to process.

【0010】

Inside the head body 12, a thin plate-shaped elastic plate 40 straddling between the heel and the toe of the rear portion 11 of the head body 11 and in contact with the inner surface of the face surface member 10 is provided. The elastic plate 40 is curved in an arc shape in the plate thickness direction, and both end portions 40a are welded to the heel and the inner surface of the toe of the side peripheral portion 22b. Further, the outer surface of the central portion of the elastic plate 40 is welded or in contact with the inner surface of the face surface member 10. The elastic plate 40 is formed of various β-type titanium having a thickness of, for example, about 1.2 mm in the range of 1.0 to 1.7 mm, similarly to the rear portion 11 of the head body.

【0011】

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

【0012】

In this method of manufacturing a golf club head, first, a titanium alloy face member 10 is forged cold or hot and plastically deformed to form a predetermined curved shape and a groove 10a on the front and back surfaces is formed. To do. As the 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, the workability is good and it is easy to form a desired shape. Further, in the case of cold forging, it is possible to obtain a tough face surface member 10 having a dense metal structure. Further, the upper surface portion 20 and the side peripheral bottom surface portion 22 are forged into a predetermined shape and formed. After that, 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, the side surface portion 24b and the side peripheral portion 22b of the shaft mounting pipe 24 are accurately positioned and welded while being fixed with a jig (not shown). The rear portion 11 of the head body may be integrally formed by casting.

【0013】

Further, before or after welding the face surface member 10 to the rear portion 11 of the head body, the elastic plate 40 is welded to the side peripheral portion 22b. The central portion of the elastic plate 40 is also welded to the inner surface of the face surface member 10. The central portion of the elastic plate 40 may be in contact with the face surface member 10, and may be welded if necessary.

【0014】

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 head main body rear portion 11. At this time, the lower end portion 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, and the welded portion 34 is formed. These weldings can be appropriately selected, such as laser welding and electron beam welding.

【0015】

After the face surface member 10 of the head body 12 is welded, a sound deadening material such as silicone resin is attached to the inner surface of the golf club head. The sound deadening material in a state before being dissolved in a solvent and cured is injected through the opening of the shaft mounting pipe 24, and is injected into the inside of the golf club head through the through hole 24d of the tip portion 24a. Then, before the sound deadening material is cured, it is applied to the inner surface of the head body 12, and the coating thickness is adjusted by rotating or shaking the golf club head, so that the golf club head is set to a desired center of gravity position. To do so. After that, the shaft 26 is inserted into the shaft mounting pipe 24 and fixed with an adhesive or the like.

【0016】

In the golf club head of this embodiment, the central portion of the curved elastic plate 40 abuts on the back surface of the face surface member 10 to reinforce the face surface member 10, so that the face surface member 10 is thin and has good elasticity. It can be formed from a material, which enhances the resilience of the face surface of this golf club head. Further, by forming the elastic plate 40 from the same member as the rear portion 11 of the head body, the material can also be used, which also contributes to cost reduction.

【0017】

Further, the rear portion 11 of the head body is composed of various β-type titanium having a relatively thin thickness and high strength, and the thickness of each portion is formed to be substantially equal, so that the position of the center of gravity is located relatively upward. , The blow-up of the hit ball is prevented, and the trajectory can be drawn with a more ideal parabola to extend the flight distance. Further, since the face surface 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, and the face surface member 10 is greatly thinned to expand the sweet spot. At the same time, it is possible to suppress an increase in the overall weight, enable a stable shot, and extend the flight distance of the hit ball. If 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.

【0018】

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-shaped elastic member as well as an elastic plate. Further, it can be applied to a golf club head having an appropriate structure, such as one in which the head body is integrally formed of titanium or a titanium alloy, or one in which a face surface member and a shaft mounting pipe portion are integrally provided. .. Further, the shape of the elastic member can be appropriately set, and a cantilever structure in which the elastic member is in contact with the face surface from either the heel or the toe side may be used.

【0019】

[Effect of the invention]

According to the golf club head of the present invention, the thickness of the face surface member can be reduced without increasing the weight of the golf club head, and the resilience of the ball and the sweet spot can be increased. As a result, a stable direction of the hit ball and a large flight distance can be obtained.

[Simple explanation of drawings]

[Figure 1]

It is an exploded perspective view of one Embodiment of the golf club head of this invention.

[Figure 2]

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

[Fig. 3]

It is a vertical sectional view of the golf club head of this embodiment.

[Fig. 4]

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

[ Explanation of symbols ]

10 Face member 11 Rear of head body 12 Head body 14 Face mounting part 20 Top surface 22 Side circumference bottom 22a sole part 22b side circumference 24 Shaft mounting pipe 26 shaft 40 elastic plate