JP2002315855A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gold club, with which directionality is improved and a flying distance is not dispersed, in the golf club with volume <=200 cm<3> . SOLUTION: In the metallic hollow golf club head, a sole part 1 is provided into three in the toe-heel direction and the thickness of a toe part area A and a heel part area C is made thicker than that of a central part area B.

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 made of hollow metal.

[0002]

2. Description of the Related Art Most golfers cannot hit a golf ball with a sweet spot on a face surface at the time of impact, and often cause an offset collision. In the case of an offset collision in the left and right direction of the sweet spot, there is a problem that the directionality of the hit ball varies and the flight distance of the hit ball decreases.

[0003] In order to eliminate variations in the flight distance of a hit ball at the time of an offset collision in the left-right direction, when the golf club head is grounded according to a loft angle and a lie angle, which is called a toe-heel moment of inertia, Attempts have been made to increase the moment of inertia about an axis that passes through the center of gravity of the body and is perpendicular to the ground. To increase the toe-heel moment of inertia, it is sufficient to distribute the mass to the toe and heel at the sole and side of the head body. A method of compounding a metal with a higher specific gravity than the main body,
The method of arranging the weight body and the like are already known.

For example, Japanese Patent Application Laid-Open No. 10-33724 discloses that
The material of the club head body is provided in the hollow portion of the club head body in order to improve the hitting sound and feel at the time of hitting, to increase the depth of the center of gravity of the club head and the moment of inertia around the head, and to further reduce the center of gravity. A golf club head having a built-in resonator having a specific gravity higher than that of the golf club is disclosed.

Japanese Patent Application Laid-Open No. 11-155982 discloses that in order to obtain a comfortable hitting sound and a soft hitting feel, to lower the center of gravity, and to increase the moment of inertia of the heel and toe, at least a part of the center portion excluding the face portion is provided. A golf club head characterized in that the wall thickness is formed thinner than the periphery is disclosed.

Japanese Patent Application Laid-Open No. 11-216203 discloses that a sole portion in a plan view is divided into a front area on the face side and a rear area on the back side in order to set the center of gravity of the head low without impairing the balance of the moment of inertia in each direction. A golf club head is disclosed in which the thickness of at least a part of the front region is set to be at least twice as large as the average thickness of the rear region.

[0007]

It is true that distributing the mass to the toe portion and the heel portion in the sole portion and the side portion of the head body is a very effective means in terms of increasing the toe-heel moment of inertia. As a result, flight distance reduction and directionality variation at the time of an offset collision were improved. However, if the mass is distributed to the toe and the heel in the above manner in the sole portion and the side portion of the head body for the purpose of increasing the toe-heel moment of inertia, the moment of inertia around the shaft axis center also increases. Therefore, the following inconvenience occurs.

[0008] For beginner and intermediate golfers,
If the moment of inertia around the center of the shaft axis is large, the head will not return to a square shape and will impact with the face face open, resulting in a hit ball being a sliced ball.

In the invention of Japanese Patent Application Laid-Open No. H10-33724, when the head is impacted in a state where the head is opened from the square as described above, there is a problem that the hit ball becomes a slice ball, and when the resonator is fixed to the sole plate, welding or casting is performed. Since they are sometimes fixed integrally, there is a problem that the structure becomes complicated and the manufacturing cost increases.

In the inventions of JP-A-11-155982 and JP-A-11-216203, there is a problem that the hit ball becomes a slice ball when the head is impacted in a state where it is opened from a square as described above.

Accordingly, the present invention provides a golf club head suitable for beginners and intermediate players, achieving the contradictory object of reducing the moment of inertia around the shaft axis center while increasing the toe-heel moment of inertia. The purpose is to:

[0012]

According to a first aspect of the present invention, in a golf club head made of a hollow metal, the sole width of the sole is divided into three along a straight line substantially perpendicular to the face surface, and the sole is divided by the straight line. A golf club head comprising a toe portion region, a central portion region, and a heel portion region, wherein the thickness of the toe portion region and the thickness of the heel portion region are greater than the thickness of the central portion region. It is.

According to a second aspect of the present invention, there is provided the golf club head according to the first aspect, wherein the width of the toe region, the width of the central region, and the width of the heel region are equal.

According to a third aspect of the present invention, there is provided the golf club head according to the first aspect, wherein the area of the heel region is larger than the area of the toe region.

According to a fourth aspect of the present invention, there is provided the golf club head according to any one of the first to third aspects, wherein the thickness of the heel region is larger than the thickness of the toe region.

According to a fifth aspect of the invention, there is provided the golf club head according to any one of the first to ^third aspects, wherein the volume of the golf club head is 200 cm ³ or less.

[0017]

FIG. 1 (a) shows an embodiment of a sole portion divided into a toe portion region, a central portion region and a heel portion region, and FIG. 1 (b) shows an embodiment in FIG. 1 (a). It is XX 'sectional drawing of.

The sole portion 1 of the golf club head according to the present invention.
Divides the entire width of the sole portion from the toe end portion 21 to the heel end portion 31 of the sole portion 1 along a straight line substantially perpendicular to the face surface 4, and divides each region of the sole portion 1 divided by the straight line into toe portions. Area A, central area B, heel area C
And The width of each area in the toe-heel direction is defined as toe area A
, WB in the central region B, and wC in the heel region C. The thickness of each region is tA in the toe region A, tB in the central region B,
In the heel region C, it is tC. In the same region, the thickness is made substantially uniform. For example, the thickness tA of the toe region A is substantially uniform over the entire region.

In the embodiment shown in FIG. 1, the width of the toe region A, the central region B and the heel region C is equal, and wA = wB = wC. Regarding the thickness of each region, the thickness tA of the toe portion region is equal to the thickness tC of the heel portion region, and the thickness tA of the toe portion region and the thickness tC of the heel portion region are equal to the thickness of the central portion region. Since it is configured to be thicker than tB, tA = tC> tB.

When the thickness of the sole portion 1 is configured as in the embodiment shown in FIG. 1, the mass can be distributed to the toe portion 2 and the heel portion 3, so that a conventional sole having a uniform thickness as shown in FIG. The toe-heel moment of inertia can be increased as compared with the portion.

FIG. 2A shows an embodiment of the sole portion in which the area of the heel region is larger than the area of the toe region when the sole portion is viewed from the crown side. FIG. 2B is a sectional view taken along line XX ′ in FIG.

When the area of the toe area A is sA, the area of the central area B is sB, and the area of the heel area C is sC when viewed from the crown side, in the embodiment shown in FIG. The area sC of the partial region is configured to be larger than the area sA of the toe region. The area sB of the central area may be smaller than the area sA of the toe area, may be larger than the area sC of the heel area, or may be larger than the area sA of the toe area. It may be smaller than sC. That is, sC>sA> sB may be satisfied, sB>sC> sA may be satisfied, or sC>
sB> sA may be satisfied. For the thickness of each area,
As in the embodiment shown in FIG. 1, the thickness tA of the toe portion region is equal to the thickness tC of the heel portion region, and the thickness tA of the toe portion region and the thickness tC of the heel portion region are equal to the center region. TA = tC> tB
It is.

When the thickness of the sole portion 1 is configured as in the embodiment shown in FIG. 2, the mass can be distributed to the toe portion 2 and the heel portion 3, so that the toe-heel moment of inertia can be increased. Further, by making the area sC of the heel area as viewed from the crown side larger than the area sA of the toe area, the moment of inertia about the center of the shaft axis can be reduced as compared with the embodiment shown in FIG. Can be done.

FIG. 3A shows an embodiment of the sole portion wherein the thickness of the heel region is larger than the thickness of the toe region. FIG. 3B shows the embodiment of FIG. It is XX 'sectional drawing in a middle.

In the embodiment shown in FIG. 3, similarly to the embodiment shown in FIG. 1, the widths of the toe region A, the central region B, and the heel region C are equal, and wA = wB = wC It is. Regarding the thickness of each region, unlike the embodiment shown in FIG. 1, the thickness tC of the heel region is equal to the thickness t of the toe region.
It is thicker than A. Since the thickness tB of the central region is configured to be thinner than the thickness tA of the toe region,
The relationship between the thicknesses of the respective regions is tB <tA <tC.

When the thickness of the sole portion 1 is configured as in the embodiment shown in FIG. 3, the mass can be distributed to the toe portion 2 and the heel portion 3, so that the toe-heel moment of inertia can be increased. Further, by making the thickness of the heel region thicker than the thickness of the toe region, the moment of inertia around the center of the shaft axis can be reduced as compared with the embodiment shown in FIG.

FIG. 4A shows that the area of the heel region is larger than the area of the toe region when the sole portion is viewed from the crown side, and the thickness of the heel region is the thickness of the toe region. It is an example of a sole portion characterized by being thicker than
FIG. 4B is a cross-sectional view taken along the line XX ′ in FIG.

In the embodiment shown in FIG. 4, the area sC of the heel region when viewed from the crown side is equal to the area s of the toe region.
It is configured to be larger than A. Area sB of central region
SC>sA> as in the embodiment shown in FIG.
It may be sB, sB>sC> sA, or sC>sB> sA. As for the thickness of each region, as in the embodiment shown in FIG. 3, the thickness tC of the heel region is the thickest and the thickness tB of the central region is the thinnest. Is tB <tA <
tC.

When the sole portion 1 is constructed as in the embodiment shown in FIG. 4, the toe-heel moment of inertia can be increased, and the shaft portion around the center of the shaft axis can be compared with the embodiment shown in FIGS. Can be reduced.

FIG. 5 shows an embodiment of a golf club head in which the sole portions shown in FIG. 4 are joined.

Since the sole portion of the golf club head of the present invention uses a casting method at the time of processing, the manufacturing cost can be reduced as compared with the sole portion to which the weight body 10 shown in FIG. 7 is attached later.

Recently, some golf club heads have been increased in size in order to increase the repulsion force. However, in such a head, when the mass is distributed to the toe portion and the heel portion, the value of the moment of inertia around the center of the shaft axis becomes 4,500 g.・ Cm ²
It is difficult to keep it below. Therefore, the golf club head of the present invention is most effective in a golf club head having a volume of 200 cm ³ or less.

[0033]

According to the golf club of the present invention, the sole portion is divided into a toe region, a central region and a heel region, and the thickness of the toe region and the heel region is made larger than the thickness of the central region. By increasing the thickness, the mass can be distributed to the toe portion and the heel portion, so that the toe-heel moment of inertia can be increased as compared with the sole portion having a uniform thickness. Further, in the above-mentioned sole portion, by increasing the area of the heel portion region when viewed from the crown portion side, or by increasing the thickness of the heel portion region, while increasing the toe-heel moment of inertia, The moment of inertia around the shaft axis center can be reduced. In a large-sized golf club head having a volume exceeding 300 cm ³ , it is structurally difficult to suppress the value of the moment of inertia around the shaft axis center to 4500 g · cm ² or less when the mass is distributed to the toe portion and the heel portion. Therefore, the golf club head of the present invention is most effective in a golf club head having a volume of 200 cm ³ or less, realizes a golf club that is suitable for beginners and intermediate players, has good directivity, does not vary in flight distance. Can do things.

[0034]

[Brief description of the drawings]

FIG. 1A is an embodiment of a sole portion divided into a toe portion region, a central portion region, and a heel portion region, and FIG.
FIG. 2B is a sectional view taken along line XX in FIG.

FIG. 2A is an embodiment of a sole portion in which the area of a heel portion region is larger than the area of a toe portion region when the sole portion is viewed from the crown portion side;
FIG. 2B is a sectional view taken along line XX in FIG.

3 (a) is an embodiment of a sole portion characterized in that the thickness of a heel region is larger than the thickness of a toe region, and FIG. 3 (b) is an embodiment of the sole portion. It is XX line sectional drawing in a middle.

FIG. 4 (a) is a view in which the area of the heel region is larger than the area of the toe region when the sole portion is viewed from the crown side, and the thickness of the heel region is the thickness of the toe region. FIG. 4 is an embodiment of a sole portion characterized by being thicker than FIG.
FIG. 5B is a sectional view taken along line XX in FIG.

FIG. 5 is an embodiment of a golf club head in which the sole portions shown in FIG. 4 are joined.

FIG. 6 is a sectional view of a sole portion of a conventional golf club head.

FIG. 7 is a sectional view of a sole portion of a conventional golf club head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sole part 2 Toe part 21 Toe end part 3 Heel part 31 Heel end part 4 Face surface 5 Crown part 6 Golf club head 10 Weight body A Toe part area B Central part area C Heel part area wA Width of toe part area wB Center Area width wC Width of heel area tA Thickness of toe area tB Thickness of central area tC Thickness of heel area sA Area of toe area sB Area of central area sC Area of heel area

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C002 AA02 CH02 CH06 LL01 MM04 PP02 SS01

Claims (5)

[Claims] 1. A golf club head made of a hollow metal, wherein the entire width of the sole portion is divided into three along a straight line substantially perpendicular to the face surface, and each region of the sole portion divided by the straight line is a toe portion region and a central portion. A golf club head comprising a region and a heel region, wherein the thickness of the toe region and the thickness of the heel region are greater than the thickness of the central region. 2. The golf club head according to claim 1, wherein the width of the toe portion region, the width of the central portion region, and the width of the heel portion region are equal. 3. The golf club head according to claim 1, wherein the area of the heel region is larger than the area of the toe region. 4. The heel region has a thickness greater than that of the toe region.
The golf club head as described. 5. The golf club head has a volume of 200 c.
m ³ according to claim 1, 2, 3 or 4 golf club head, wherein the less.