JP7120165B2 - Golf club head and golf club - Google Patents

Description

The present invention relates to an iron-type golf club head and a golf club.

Conventionally, some iron-type golf club heads are provided with a reinforcing member in order to increase their strength. For example, in Patent Document 1 below, a top edge portion is formed on the back portion side of the back side of the face portion so as to define a part of the tip corner portion region located near the connection portion between the top edge portion and the toe portion. An iron golf club head is disclosed with a stiffening portion having a portion extending obliquely from the toe to the toe portion and being stiffer than the tip corner region.

JP 2009-240587 A

However, the technique described in Patent Document 1 aims at improving the hitting feel by improving the hitting sound with the reinforcing portion, and does not consider flight distance performance at all.

SUMMARY OF THE INVENTION In view of the circumstances as described above, an object of the present invention is to provide an iron-type golf club head and a golf club capable of improving flight distance performance.

In order to achieve the above object, a golf club head according to one aspect of the present invention has an iron-type head body and ribs. The head body has a face surface whose height gradually increases from the heel side to the toe side and a back face portion located on the back side of the face surface. The rib portion is integrally formed with the head body from the top blade side to the toe side of the back face portion. In the rib portion, the distance between the centroid of the face surface and the hitting point when the position on the face surface corresponding to the rib portion is regarded as the upper part of the face surface and the toe side end portion is is provided at a position such that it is at least vertically smaller than if it were not provided.

With this configuration, by providing the rib portion, the shape of the portion that can be regarded as the face surface can be changed, and the centroid of the face surface (the point where the face surface flexes the most) can be brought closer to the hitting point, thereby improving the distance to the ball. Variation in distance can be suppressed and flight distance performance can be improved.

The rib portion may be provided such that the centroid moves by 5 mm or more in the vertical direction as compared with the case where the rib portion is not provided.

A face thickness of the head body on the heel side of the rib portion may be 2 mm or less.

As a result, by making the face thickness thinner than the general face thickness of the head body without ribs, it is possible to obtain the same amount of deformation of the face as when ribs are not provided.

The face thickness of the head body on the toe side of the rib may be smaller than the face thickness on the heel side of the rib.

As a result, the thickness of the face on the toe side, that is, the upper part of the rib, is reduced to reduce weight, lowering the center of gravity of the head body, which was raised by providing the rib, and reducing energy efficiency. It is possible to prevent a decrease in flight distance.

A distance from the face surface to the apex of the rib portion in the vertical direction of the face surface may be equal to or less than the thickness of the top blade of the head body.

In particular, when the distance is the same as the thickness of the top blade, the polishing work during manufacturing is also facilitated.

A golf club according to another embodiment of the present invention includes any one of the golf club heads described above and a golf club shaft attached to the golf club head.

As described above, according to the present invention, it is possible to provide an iron-type golf club head and a golf club capable of improving flight distance performance. However, this effect does not limit the invention.

1 is a perspective view showing the appearance of a head portion of a golf club according to a first embodiment of the present invention; FIG. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; FIG. 2 is a diagram showing the relationship between the centroid of the face surface of the golf club and the hit point.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First embodiment]
First, a first embodiment of the present invention will be described.

FIG. 1 is a perspective view showing the appearance of a golf club head portion of a golf club according to this embodiment. FIG. 2 is a cross-sectional view taken along line AA of FIG.

As shown in both figures, the golf club 100 according to this embodiment has a golf club head 10 and a golf club shaft 5 attached to the golf club head 10 .

The golf club shaft 5 is attached to the golf club head 10 via, for example, a socket (not shown) or the like, but may be directly attached without a socket or the like.

The golf club head 10 has an iron-shaped head body 1 . The head body 1 includes a face surface 1a whose height (length in the Y direction in both figures) gradually increases from the heel side (left side in FIG. 1) to the toe side (right side in FIG. 1), and the face surface 1a. It has a back face portion 1b located on the back side of the surface 1a and a sole portion 1c.

A top blade 1d is formed between the upper end of the face surface 1a and the upper end of the back face portion 1b.

The head body 1 also has a rib portion 2 formed from the top blade 1d side of the back face portion 1b to the toe side thereof.

The head body 1 and the rib portion 2 are integrally formed by casting or forging a material such as stainless steel such as AM355 (precipitation-hardening titanium, aluminum, or copper is added and heat-hardened after molding). be done.

Further, as shown in FIG. 2, the distance D1 from the face surface 1a to the apex of the rib portion 2 in the vertical direction of the face surface 1a is the same as the thickness D2 of the top blade 1d. As a result, the top blade 1d and the rib portion 2 are flush with each other, which facilitates the polishing work during manufacturing. However, D2 may be larger than D1.

FIG. 3 is a diagram showing the relationship between the centroid of the face surface 1a of the golf club head 10 and the hitting point.

FIG. 1A shows the centroid C and hitting point H of the face surface of a conventional golf club head without the rib portion 2, and FIG. The centroid C and the hit point H of 1a are shown.

As shown in FIG. 1A, in the conventional golf club head, the hitting point H and the centroid C are separated by 9.47 mm in the vertical direction and by 5.4 mm in the horizontal direction.

On the other hand, as shown in FIG. 1B, in the golf club head 10 according to the present embodiment, the position on the face surface 1a corresponding to the rib portion 2 is regarded as the upper and toe-side end portion of the face surface 1a. In this case, the hit point and the centroid are separated by 0.02 mm in the vertical direction and by 3.24 mm in the horizontal direction.

That is, in the golf club head 10 according to the present embodiment, the centroid and the hit point are closer by 9.45 mm in the vertical direction and by 2.16 mm in the horizontal direction than the conventional golf club head.

Thus, in the present embodiment, the rib portion 2 is located at the centroid of the face surface 1a when the position on the face surface 1a corresponding to the rib portion 2 is regarded as the upper and toe-side end portion of the face surface 1a. The distance between C and the hit point H is provided at a position such that the distance is smaller at least in the longitudinal direction (vertical direction) and the lateral direction than when the rib portion 2 is not provided.

Preferably, the rib portion 2 is provided so that the centroid C moves 5 mm or more in the longitudinal direction (vertical direction) as compared with the case where the rib portion 2 is not provided.

With this configuration, the shape of the portion that can be regarded as the face surface 1a is changed by providing the rib portion 2 to the shape of the face surface F indicated by the dashed line in FIG. The most flexible point on the surface 1a can be brought closer to the hitting point, thereby suppressing variations in flight distance and improving flight distance performance.

In providing the rib portion 2, it is necessary to secure the same repulsive force (deformation amount) before and after providing the rib portion 2 to the conventional golf club head. Therefore, when the rib portion 2 is provided, it is necessary to reduce the face thickness of the head body 1 .

In developing the golf club head 10 according to the present embodiment, the inventors wondered how much the face thickness should be reduced in order to ensure the same amount of deformation (repulsive force) as that of a conventional golf club head without the rib portion 2. Analysis was conducted by varying the face thickness between a conventional golf club head and a golf club head provided with the rib portion 2 to determine which is best.

Specifically, a conventional head (face thickness: 2.1 mm), a conventional head with a reduced face thickness, a conventional head with ribs 2 provided with the same face thickness, and a conventional head with ribs A plurality of patterns were prepared by providing a portion 2 to reduce the face thickness, and the amount of strain and stress on the face surface were measured for each pattern.

As a result, it was concluded that the thickness of the face should be reduced to 2.0 mm or less in order to provide the rib portion 2 and secure a deformation amount equivalent to that of the conventional head.

Further, in this case, the face thickness on the toe side of the rib portion 2 is preferably smaller than the face thickness on the heel side of the rib portion 2 .

As a result, the thickness of the face on the toe side of the rib portion 2, that is, on the upper portion of the rib portion 2, is reduced and the weight is reduced. can be approached with As a result, it is possible to prevent the kinetic energy of the head 10 from being sufficiently transmitted to the ball due to the high center of gravity, resulting in a failure to obtain sufficient flight distance performance.

[summary]
As described above, according to the present embodiment, by providing the rib portion 2, the shape of the portion that can be regarded as the face surface 1a can be changed, and the centroid of the face surface 1a can be brought closer to the hitting point. , variation in flight distance can be suppressed, and flight distance performance can be improved.

[Modification]
The present invention is not limited to the above-described embodiments, and can be modified in various ways without departing from the gist of the present invention.

In the above-described embodiment, the rib portion 2 is provided linearly, but may be provided in a shape curved upward or downward.

In the above-described embodiment, the rib portion 2 is provided from the top blade 1d to the toe side end of the back face portion 1b. may be provided.

In the above-described embodiment, by providing the rib portion 2, the hit point H and the centroid C were formed so as to approach each other in both the vertical and horizontal directions. As long as the points are formed so as to be close to each other, the hitting point H and the centroid C do not necessarily need to be close to each other in the lateral direction.

DESCRIPTION OF SYMBOLS 1... Head body 1a... Face part 1b... Back face part 1c... Sole part 1d... Top blade 2... Rib part 10... Golf club head 100... Golf club C... Centroid H... Hitting point

Claims (5)

an iron-type head body having a face surface whose height gradually increases from the heel side to the toe side and a back face portion located on the back side of the face surface;
a rib portion integrally formed with the head body from the top blade side to the toe side end of the back face portion,
In the rib portion, the distance between the centroid of the face surface and the hitting point when the position on the face surface corresponding to the rib portion is regarded as the upper part of the face surface and the toe side end portion is is provided at a position such that it is at least vertically smaller than without
A golf club head, wherein the face thickness of the head body on the toe side of the rib portion is smaller than the face thickness on the heel side of the rib portion. The golf club head of claim 1, comprising:
The golf club head, wherein the rib portion is provided so that the centroid moves by 5 mm or more in the vertical direction as compared with a case where the rib portion is not provided. 3. The golf club head according to claim 1 or 2,
A golf club head, wherein the head body has a face thickness of 2 mm or less on the heel side of the rib portion. 4. The golf club head according to any one of claims 1 to 3,
A golf club head, wherein a distance from the face surface to a vertex of the rib portion in a vertical direction of the face surface is equal to or less than a thickness of a top blade of the head main body. a golf club head according to any one of claims 1 to 4;
and a golf club shaft attached to the golf club head.

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