JPH11299939A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the deformation amount of a face part during ball hitting. SOLUTION: A golf club head is provided with a face member 2 on which a portion 20 of a laminated structure with a plurality of plate materials 2A, 2B laminated and coupled to each other on part of the peripheries is arranged in an area including a sweet area, the respective plate materials 2A, 2B, in particular, the plate material 2A nearer a ball hitting plane, being set thinner.

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, and more particularly, to a golf club head having an improved face structure.

[0002]

2. Description of the Related Art In order to increase the flight distance of a golf club, a structure in which a plurality of plate members are laminated as a structure of a face portion has been proposed (JP-A-9-239076). This is to reduce the spring constant of the face portion, increase the restoring force of the deflection of the face when the face collides with the ball, increase the initial velocity of the hit ball, and increase the flight distance.

[0003]

However, even in such a club head having a face structure in which a plurality of plate members are stacked, the area of the face portion of the stacked structure is compared within the face surface for the purpose of improving the directionality of a hit ball. Set too narrowly,
Alternatively, in the case of a club for a weak player such as a senior or a ladies, a problem is expected that the spring constant of the face portion does not decrease as expected.

Accordingly, it is an object of the present invention to provide a golf club head having a laminated face portion capable of further increasing the amount of deformation of the face portion when hitting a ball.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a region in which a plurality of plate members are laminated and a part of a laminated structure which is mutually connected at a part of a peripheral portion thereof includes a sweet area. A golf club head comprising a face member arranged in the above manner, wherein the thickness of each of the plate members is set to be thinner as the plate member is closer to the hitting surface.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially cutaway plan view showing a preferred embodiment of the present invention, in which an area including a sweet area of a face member 2 constituting a head 1 includes a plurality of plate members 2A and 2A.
B is a portion 20 of the laminated structure in which the layers B are laminated. In this embodiment, two plate members 2A and 2B are used, and the plate member 2A on the hitting surface side is thinner than the plate member 2B on the back side. That is, the thickness _{t 2} of the thickness _{t 1} and the plate member 2B of the plate _2A, a relationship of t 1 _{<t 2.} Even in a structure in which three or more plate materials are stacked, the thickness of each plate material is set to be thinner as the plate material is closer to the ball striking surface. In the example shown in FIG. 1, t ₁ = 1.2 mm and t ₂ = 2.0 mm, and both plate members 2A and 2B were formed from 15-3-3-3β type titanium. Reference numeral 3 denotes a hosel, and a shaft (not shown) is mounted on the hosel 3 to constitute a golf club.

FIG. 2 is a front view of the golf club head shown in FIG. 1, and the portion of the laminated structure in which the plate members 2A and 2B are laminated is indicated by reference numeral 20. The plate members 2A and 2B are welded to each other on the toe 4 and the heel 5 side, and are joined only to the toe 4 and the heel 5 side without welding the entire periphery of the portion 20 to the face member 2 other than the portion 20. The joint is indicated by reference numeral 6. By not joining the entire periphery of the portion 20 to the face member 2, the plate members 2A and 2B are easily deformed at the time of hitting the ball.

The means for joining the plate members 2A and 2B is not limited to welding, but may be screwing or other known means. Note that the “sweet area” refers to an area of a hit ball where 95% of the maximum flight distance is obtained. In the illustrated embodiment, a wood club head is shown, but the present invention can be applied to an iron club head. The face portion of a golf club is usually formed so as to have a convex surface on the side of the striking surface in a wood club, and the face portion including the striking surface of an iron club is formed in a flat plate shape.

In FIG. 2, the portion 20 of the laminated structure is substantially present in the sweet area, but may be present in the range from the toe 4 to the heel 5 or the range from the sole to the crown so as to include this area. . In addition, although β-type titanium is used as the plate members 2A and 2B, a strong and light metal such as duralumin can be used.

[0011]

As described above, according to the present invention, a face in which a plurality of plate members are laminated and a part of a laminated structure mutually connected at a part of a peripheral portion thereof is arranged in a region including a sweet area. In a golf club head having members, the thickness of each plate material is set to be thinner as the plate material is closer to the ball striking surface, so that the bending deflection due to the collision of the ball at the time of hitting and the displacement between the laminated plate materials. Deformation composed of the following occurs in the portion of the laminated structure, the amount of deformation of the face surface increases, the amount of storage of energy of bending of the head increases,
By increasing the initial speed of the hit ball, the flight distance can be increased, and the face surface is easily deformed at the time of hitting, while the deformation of the ball is small, the energy loss of the ball is suppressed and the coefficient of restitution is increased. Can be. Also,
Since the double structure portion of the face surface is limited to the vicinity of the sweet area, even when the ball is hit off-center, an unnecessary increase in the spin amount is suppressed, and the directionality of the hit ball is improved.
Moreover, since the thickness of the plate material that becomes the hitting surface is made the thinnest and the thickness of the plate material laminated thereon is set sequentially thicker, even if a weak player with a slow head speed hits,
Since the thin plate material arranged close to the striking face is easily deformed, a larger amount of deformation of the face surface can be obtained. Also, in order to enhance the directionality of the hit ball, in the face surface, if the area of the laminated structure is set to be small and small, deformation of the laminated plate material when hitting the ball is unlikely to occur, therefore Although there is a concern that it is difficult to obtain an effective restoring force, in the part of the laminated structure of the present invention, even if the area of this part is reduced, the plate material close to the striking surface is easily deformed because it is thin. You can get the quantity.

[Brief description of the drawings]

FIG. 1 is a partially broken plan view showing a preferred embodiment of the present invention.

FIG. 2 is a front view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head 2 Face member 2A, 2B Plate 20 Part of laminated structure

Claims (1)

[Claims] 1. A golf club head comprising a face member in which a plurality of plate members are laminated and a part of a laminated structure mutually connected at a part of a peripheral portion thereof is disposed in a region including a sweet area, A golf club head, wherein the thickness of each of the plate members is set to be thinner as the plate member is closer to the hitting surface.