JPH0947528A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the direction of a bit ball and to prevent decline of the carry, by embedding a weight into a heel side and a toe side toward a face opposite to a club face, so that the position of the center of gravity of a wood club head is lowered and a torsion becomes hard to occur. SOLUTION: Weights 40 are embedded into a golf club head on the heel side and the toe side on the face opposite to the club face 10. In such a golf club head, the position of the center of gravity A1 is deeper than the center of gravity A2 of a convertional golf club head as shown by an imaginary line. Consequently, due to inertia, even when, for example, a hitting position of a ball is off the sweet spot to be on the toe side, the twist angle becomes θ1 which is smaller than the conventional twist angle θ2, resulting in less deviation in directionality. At the same time, even when the hitting position of the ball is off the sweet spot, the position of the center of gravity is far, twist hardly occurs, so that an impact force lowers little, and the carry declines very little.

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 a wide sweet spot.

[0002]

2. Description of the Related Art Conventionally, golf clubs have been improved at a considerable pace. The target of such improvement is improvement of the material of the golf club shaft or improvement of the golf club head. Here, the improvement of the golf club head can be divided into an iron club head and a wood club head.

Of these, the wood club head, in particular, has been rapidly improved, including the entire material and the material of the club face. As shown in FIG. 7, most of the conventionally used wood club heads are made by cutting a sphere in two planes orthogonal to each other, with one side being a sole 1 and the other side being a club face 2. Met. In addition, instead of the sphere, there was one formed in a shape obtained by cutting a pear-shaped original shape.

More specifically, the ball is cut in two planes orthogonal to each other, the portion contacting the ground is the sole 1, the portion hitting the ball is the club face 2, and the neck 4 is projected upward from the vicinity of the heel 3. Is formed. Then, the tow 5 was formed on the side opposite to the neck 4. Further, the shaft 6 is fixed to the neck 4.

The improvement of such a wood club head has been made by improving the overall material, the material of the club face, and the structure. Regarding the improvement of the structure of such a wood club head, there is an improvement mainly focusing on the position of the center of gravity. As such an improvement, for example, as in the invention described in Japanese Utility Model Application Laid-Open No. 64-17270, the position of the center of gravity can be arbitrarily set by selectively fixing a screw member to the wood club head, As in the invention described in Japanese Utility Model Laid-Open No. 5-51374, the center of gravity is lowered by forming the wood club head in a crown shape, and JP-A-5-42234.
Some of the inventions, such as the invention described in the publication, have a hollow portion formed in a wood club head and a weight body is appropriately arranged in the hollow portion so that the position of the center of gravity can be set appropriately.

Further, as in the invention described in Japanese Utility Model Laid-Open No. 61-196768, by fixing a core body having a larger specific gravity than the head main body to the toe side and heel side of the head main body of the wood club head. There were also those that increased the repulsive force and the directionality of the hit ball. However, in many of these inventions or inventions, the position and size of the weight body are changed to balance the weight body.
Even in the case of focusing on the center of gravity itself as in the invention described in Japanese Patent Laid-Open No. 74, it was intended to lower the center of gravity.

On the other hand, it is desirable that the wood club head hit a ball at a sweet spot near the center of the club face. However, even if the ball is hit at the sweet spot, the wood club head itself rotates in the counter-hit direction around the shaft immediately after the ball is hit because of the distance between the neck connected to the shaft and the sweet spot. Such a twisting force acts. Further, for example, when the hitting ball position deviates from the sweet spot and comes to the toe side, such a twist becomes large.

Further, when such twist occurs, the surface of the club face changes due to the twist and the hitting direction is deviated, so various twist preventive measures have been taken. In order to prevent such twisting, conventionally, for example, a material or structure of a shaft resistant to twisting has been developed. However, in order to prevent the twist, in addition to the improvement of the shaft as described above, there may be a serious concern that the inertia is hard to twist.

However, at least when the applicant conducted a Patrice search with a search formula of IC = A63B 53/04 * FK = center of gravity, an invention or device concerning a serious concern in consideration of twist could not be found.

[0010]

The invention according to claim 1, 2 or 3 of the present invention is to deepen the center of gravity of the whole wood club head and to arrange the weights on the heel side and the toe side. It is an object of the present invention to provide a golf club head that is hard to twist, stabilizes the directionality of a hit ball, and prevents a reduction in flight distance.

[0011]

Here, in describing the means for solving the problems, the reference numerals are given only for the purpose of facilitating the understanding. In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is the heel 20 side and the toe 30 in the anti-club face 10 surface direction.
It is characterized in that a weight 40 is internally provided on the side.

Here, the material and shape of the golf club head or the material of the club face 10 is not specified. Therefore, with regard to the material of the golf club head and the material of the club face 10, both metal and non-metal can be appropriately selected and used. The shape of the golf club head is not limited in the invention according to claim 1. However, claim 2 or 3
The weight 40 can be rationally arranged by adopting the shape as the described invention.

The invention described in claim 2 is characterized in that, in addition to the configuration of the invention described in claim 1, the whole is formed in a substantially square shape in a plane. Further, in addition to the configuration of the invention of claim 1, the invention of claim 3 projects the club face 10 as a whole, and the club face 10 from the heel 20 side and the toe 30 side to the opposite club face 10 surface side. The heel protrusion 21 and the toe protrusion 31 are provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view of a golf club head showing an embodiment of the present invention, and FIG. 2 is a schematic plan view showing a time of hitting a ball. FIG. 3 is a schematic plan view of a golf club head showing another embodiment of the present invention. Further, FIG. 4 shows the heel 20 of the golf club head.
FIG. 5 is a perspective view showing a state in which a spoiler 50 provided with an air circulation portion 51 extending from the side to the toe 30 side is attached, and FIG. 5 mainly shows a state in which a spoiler 50 provided with an air circulation portion 51 on the heel 20 side is attached. FIG. 6 is a perspective view mainly showing a state in which a spoiler 50 provided with an air circulation portion 51 is attached to the toe 30 side.

First, the present invention will be described according to the embodiment shown in FIG. The golf club head shown here is formed in a generally rectangular plane shape. The club face 10 is formed so that one side when viewed from the plane is slightly curved and protrudes outward. A neck 70 is projected on one side of the club face 10. Therefore, the neck 70 side of the club face 10 becomes the heel 20, and the non-neck 70 side becomes the toe 30. In the illustrated example, a golf club for right-handedness is shown, so the club face 10 is shown on the left side and the neck 70 is shown on the lower side, but it goes without saying that it can be applied to left-handedness. Absent. Furthermore, in front of the club face 10, a golf ball 60 is shown.

Weights 40 are internally provided on the heel 20 side and the toe 30 side of the golf club head in the direction opposite to the face of the club face 10. Also here
The weight 40 may be pre-installed when manufacturing the golf club head, or the player may select and fix the weight of the weight as appropriate. It is also possible to add a weight by adding a weight.

In such a golf club head, as shown in FIG. 2, the position of the center of gravity A1 is deeper than the center of gravity A2 of the conventional golf club head shown by the imaginary line. Therefore, due to the inertia, for example, even when the hitting position deviates from the sweet spot to the toe 30 side, the twist angle θ1 is smaller than the twist angle θ2 of the conventional product, and the directionality is small. At the same time, even if the hitting position deviates from the sweet spot, the center of gravity is far, so that it is less likely to be twisted, so that the impact force is not significantly reduced and the non-distance is not significantly reduced.

Next, a golf club head according to another embodiment of the present invention will be described with reference to FIG. This golf club head is composed of a club face 10 as a whole, and a heel protrusion 21 and a toe protrusion 31 which are protruded from the heel 20 side and the toe 30 side of the club face 10 to the side opposite to the club face 10 side. Is formed into a flat concave shape.

The heel protrusion 21 and the toe protrusion 3
1 and the weights are arranged at the rear end portions thereof. By forming in this way, the same effect as the embodiment shown in FIG. 1 can be obtained. Next, referring to FIG. 4, a description will be given of the golf club head provided with the spoiler 50 provided with the air circulation portion 51 from the heel 20 side to the toe 30 side of the golf club head shown in FIG.

In this golf club head, even if the club face 10 tends to be fogged at the time of hitting a ball during a swing, it is difficult to be fogged by the air resistance of the spoiler 50, and as a result, the ball is raised. Here, it is desirable that the spoiler 50 is formed of a non-metal in order to reduce the weight of the entire golf club head. Further, although such a spoiler 50 can be attached to a conventional golf club head, when it is attached to the golf club head shown in FIG. 1, the shape of the golf club head is a substantially quadrangular plane, and therefore it is easy to attach.

A shaft 80 is also shown here as connected to the neck 70. In the embodiment shown in FIG. 5, in the golf club head shown in FIG. 1, a spoiler 50 mainly having an air circulation portion 51 on the heel 20 side is provided.
Is provided. In this golf club head, even if the club face 10 tends to open at the time of hitting at the time of swinging, it becomes difficult to open due to the air resistance of the spoiler 50, and as a result, it becomes difficult to slice.

In the embodiment shown in FIG. 6, the golf club head shown in FIG. 1 is provided with a spoiler 50 having an air circulating portion 51 mainly on the toe 30 side.
In this golf club head, even if the club face 10 tends to close at the time of hitting at the time of swinging, the air resistance of the spoiler 50 makes it difficult to close, and as a result, it becomes difficult to hook.

[0023]

As described above, according to the first, second or third aspect of the present invention, the center of gravity of the entire wood club head is deepened and the weights are arranged on the heel side and the toe side. As a result, it is possible to stabilize the directionality of the hit ball and prevent a decrease in flight distance by making the ball hard to twist when hitting the ball.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a golf club head showing an embodiment of the present invention.

FIG. 2 is a schematic plan view showing a time of hitting a ball.

FIG. 3 is a schematic plan view of a golf club head showing another embodiment of the present invention.

FIG. 4 is a perspective view showing a state in which a spoiler having an air circulation portion extending from the heel side to the toe side of the golf club head is attached.

FIG. 5 is a perspective view showing a state in which a spoiler provided with an air circulation portion is mainly attached to the heel side.

FIG. 6 is a perspective view mainly showing a state in which a spoiler having an air circulation portion is attached to the toe side.

FIG. 7 is a perspective view showing a conventional golf club head.

[Explanation of symbols]

10 club face 20 heel 21 heel protrusion 30 toe 31 toe protrusion 40 weight 50 spoiler 51 air distribution unit 60 golf ball 70 neck 80 shaft

Claims (3)

[Claims] 1. A golf club head, wherein weights are provided on the heel side and the toe side in the direction opposite to the club face. 2. The golf club head according to claim 1, wherein the entire golf club head is formed into a substantially square shape in a plane. 3. A club face as a whole, and a heel projecting portion and a toe projecting portion projecting from the heel side and the toe side of the club face to the side opposite to the club face surface, respectively. The described golf club head.