JP2001029520A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the moment of inertia and to stabilize the directionality of ball hitting. SOLUTION: A head 10 has a slope part 15 between a top blade part 12 and a cavity part 14. By providing the slope part 15 with the shape of wall thickness gradually thickened from the peripheral edge 14A of the cavity part 14 toward the top blade part 12, it is possible to increase the vertical and lateral moments of inertia more than before and to enlarge a sweet spot. In addition, as the rigidity in the vicinity of the top blade part 12 is increased, it is also possible to stabilize the directionally of ball hitting by the heightened rigidity of the peripheral region of the head 10.

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 capable of increasing the moment of inertia and increasing the rigidity of the outer peripheral region of the head.

[0002]

2. Description of the Related Art Recently, as shown in FIG.
As the head 50 of the iron golf club, a back cavity type in which a cavity portion 52 is formed on the back surface side of the face surface 51 has become widespread in order to increase the moment of inertia by reducing the weight and lowering the center of gravity.

[0003]

However, in the head 50, an outer peripheral edge 52A of the cavity 52 is provided.
From the top surface of the face surface 51 toward the top blade portion 54 located on the upper end side in the drawing, the shape becomes gradually thinner, which hinders an increase in the moment of inertia.
There is a disadvantage that the sweet spot is narrowed. Further, since the rigidity of the outer peripheral area of the head 50 is extremely reduced as compared with the inner area of the head 50, this causes a slight blur of the head 50 at the time of a swing and stabilizes the directionality of the hit ball. There is also an inconvenience that it becomes difficult to make them. These inconveniences eventually cause a decrease in the flight distance of the hit ball.

[0004]

SUMMARY OF THE INVENTION The present invention was devised in view of such inconveniences, and its object is to increase the moment of inertia and to stabilize the direction of the hit ball, An object of the present invention is to provide a golf club head that can be expected to extend the flight distance of a golf club.

[0005]

In order to achieve the above-mentioned object, the present invention employs a configuration in which a top blade portion is provided to be thicker than a region immediately below the top blade portion. According to such a configuration, since the outer peripheral region of the head is thicker than before, the vertical and horizontal moments of inertia are increased, and the sweet spot can be enlarged.
In addition, the rigidity of the outer peripheral region of the head can be increased, and the head can be prevented from shaking during a swing, thereby stabilizing the directionality of the hit ball, thereby further extending the flight distance. You can expect.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a structure is adopted in which an inclined surface portion gradually increasing in thickness from the outer peripheral edge of the cavity portion toward the top blade portion is provided on the back surface side of the face surface. By adopting such a configuration, the appearance on the back side of the face surface can be further improved, and air resistance during a swing can be reduced. Here, it is preferable that the inclination angle of the inclined surface portion is not less than 10 degrees and not more than 45 degrees, and the top blade portion is provided to be thicker than the length from the top blade portion to the outer peripheral edge of the cavity portion. By doing this,
The vertical and horizontal moments of inertia can be expected to be further increased as compared with the conventional case, and the sweet spot can be further expanded.

[0007]

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

FIG. 1 is a schematic side view of a head in which the present invention is applied to an iron golf club. In this figure, a head 10 has a face surface 1 forming its surface.
1, a top blade portion 12 located on the upper end side of the face surface 11, a sole plate portion 13 located on the lower end side of the face surface 11, and a concave cavity portion 14 formed on the back surface side of the face surface 11. , Top blade part 1
Inclined surface portion 15 formed between cavity 2 and cavity portion 14
It consists of In the figure, reference numeral 16 denotes the head 10
It is a shaft connected to.

The inclined surface portion 15 has such a shape that the thickness gradually increases from the outer peripheral edge 14A of the cavity portion 14 toward the top blade portion 12, so that the top blade portion 12 is thicker than the region immediately below it. It can be. The inclined surface portion 15 is not particularly limited, but as shown in FIG. 2 which is an enlarged view of a portion A in FIG. 1, the inclined angle θ with respect to a predetermined reference surface A parallel to the face surface 11 is set. It is provided so as to be 10 degrees or more and 45 degrees or less. Further, the height H of the inclined surface portion 15, that is, the length from the outer peripheral edge 14A of the cavity portion 14 to the tip of the top blade portion 12 is provided to be shorter than the width B of the top blade portion 12, and thereby, The top blade portion 12 is thicker than the height H.

According to the present embodiment, the top blade 12
By making the side thicker than the area immediately below it, the moment of inertia in the vertical and horizontal directions can be increased by 5% or more as compared with the conventional case, and the sweet spot can be expanded.
In addition, the rigidity in the vicinity of the top blade portion 12 is increased, so that the directionality of the hit ball can be stabilized by increasing the rigidity of the outer peripheral region of the head 10.

FIG. 3 shows the head 10 of the above embodiment.
The experimental results for confirming the difference in the flight distance of the hit ball between the iron to which is applied and the iron to which the conventional head of the comparative example is applied are shown. In this experiment, a No. 5 iron having a loft angle of 26 degrees was swung at a head speed of 35 m / s by a predetermined robot, and the hitting distance was measured for each of three types of hitting heights. Here, the “hitting point height” refers to a distance in a direction parallel to the face surface 11 from a point where the ball contacts the face surface 11 to the sole plate portion 13 as shown in FIG.

As shown in FIG. 1, an iron to which the head 10 of the above embodiment is applied has an effect that a flight distance of a hit ball is extended as compared with an iron to which a conventional head is applied. It will be clearly understood. This is nothing but the direct effect of the above-described embodiment of expanding the sweet spot of the head 10 and increasing the rigidity of the outer peripheral region of the head 10.

[0013]

As described above, according to the present invention,
Since the top blade portion is provided thicker than the region directly below the top blade portion, the moment of inertia in the vertical and horizontal directions can be increased, and the rigidity of the outer peripheral region of the head can be increased. We can expect distance up.

[0014] Further, since an inclined surface portion gradually increasing in thickness from the outer peripheral edge of the cavity portion toward the top blade portion is provided on the back surface side of the face surface, the appearance of the back surface side of the face surface can be further improved. In addition to this, it is also possible to reduce the air resistance during the swing.

Further, the inclination angle of the inclined surface portion is set to 10 degrees or more and 45 degrees or less, and the top blade portion is provided to be thicker than the length from the top blade portion to the outer peripheral edge of the cavity portion. The moment can be expected to be further increased as compared with the conventional case, and the sweet spot can be further expanded.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a head according to an embodiment.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a view showing an experimental result for confirming an effect of increasing a flight distance of a hit ball by an iron to which the head according to the embodiment is applied.

FIG. 4 is a schematic side view of a head according to a conventional example.

[Explanation of symbols]

10 ... head, 11 ... face surface, 12 ...
Top blade part, 14 ... cavity part, 14A
..Outer peripheral edge, 15 ... Slope surface portion

Claims (4)

[Claims] 1. A golf club head, wherein a top blade portion is provided thicker than a region immediately below the top blade portion. 2. A golf club head having a cavity formed on a back surface of a face surface, wherein the back surface of the face surface gradually becomes thicker from an outer peripheral edge of the cavity portion toward a top blade portion. A golf club head having an inclined surface portion. 3. The golf club head according to claim 2, wherein the inclined surface has an inclination angle of 10 degrees or more and 45 degrees or less. 4. The golf club head according to claim 2, wherein the top blade portion is provided to be thicker than a length from the top blade portion to an outer peripheral edge of the cavity portion.