JP2000070417A - Golf club - Google Patents

Abstract

(57) [Problem] To provide a golf club capable of achieving good toe-heel balance by dispersing weight on the most toe side and the most heel side inside a head body. A head body (2) and a shaft (4) for supporting the head body are provided, and a shaft hole (8) is formed on the heel side of the head body so that a shaft tip (4a) can be inserted and fixed. Have been. The head body is formed so that the toe side D1 is heavier than the heel side D2,
In the shaft hole located on the most heel side,
A mass of about 8% or more of the total weight of the head body is inserted. The mass body includes a shaft tip inserted into the shaft hole, a weight 16 provided at the shaft tip,
A plug 20 is provided on the sole 18 side of the head body and closes the shaft hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a golf club capable of achieving good toe-heel balance by dispersing weight.

[0002]

2. Description of the Related Art Conventionally, in the technical field of golf clubs, there have been known techniques for increasing a moment of inertia of a head body and expanding a sweet spot in order to realize a stable swing and a flying distance. As one method for achieving the technique, there is a method of distributing weight on the toe side and the heel side of the head main body to achieve a toe-heel balance of the head main body.

For example, in a golf club disclosed in Japanese Patent Application Laid-Open No. 6-304271, a toe-heel balance is achieved by previously disposing a weight body having a predetermined weight inside a hollow head body.

[0004]

By the way, in order to achieve the most effective toe-heel balance, the toe-side weight member and the heel-side weight member are concentrated on the most toe side and the most heel side of the head body, respectively. Is preferred.

[0005] However, as disclosed in the above prior art, the conventional golf club generally has a predetermined weight. Therefore, if the weight is concentrated too much, the head becomes smaller, It was difficult to effectively balance the toe and heel because of lack of strength. Further, after completion of the head, the weight body is separated from the outside by the head main body, and the weight of the weight body cannot be adjusted from the outside. For this reason, when the completed head main body has an unexpected toe-heel balance, for example, a method of separately attaching a weight adjuster or the like to the outer surface of the head main body has to be taken. In this case, since the contour and shape of the head main body are destroyed, not only does the player feel uncomfortable at the time of addressing, for example, but also the player becomes difficult to hold.

On the other hand, as a golf club using a hole portion of a shaft, for example, Japanese Unexamined Utility Model Publication No. 8-568 discloses a weight member having a predetermined weight attached to a tip portion of a shaft inserted into a hosel of a head body. A technique for inserting and disposing is disclosed.

However, the weight body used in such a technique is merely used to finely adjust the weight shortage relative to the total weight of the head body. Therefore, it is not possible to disperse the weight sufficiently on the toe and the heel of the head body by using the weight body alone, and it is necessary to take a method of separately attaching a weight adjusting body or the like to the outer surface of the head body. Therefore, the contour and shape of the head main body are broken.

Accordingly, an object of the present invention is to provide a golf club capable of achieving a good toe-heel balance by dispersing the weight on the toe side and the heel side of the head body.

[0009]

In order to achieve the above object, a golf club according to the present invention comprises a head body having a toe side heavier than a heel side, a shaft for supporting the head body, A shaft hole provided on the heel side of the head body and capable of inserting and fixing the shaft, wherein a mass of about 8% or more of the total weight of the head body is provided in the shaft hole. The body is inserted.

Further, the golf club of the present invention is provided with a head body, a shaft for adhesively fixing and supporting the head body, and a heel side of the head body, wherein the shaft is inserted and fixed. The head body is formed heavier than the heel portion when the head body is divided into a toe portion, a heel portion, and a center portion between the toe portion and the heel portion. In addition, a mass body of about 8% or more of the total weight of the head body is inserted into the shaft hole.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a golf club according to a first embodiment of the present invention will be described with reference to FIG. As shown in FIGS. 1A and 1B, the golf club according to the present embodiment includes a hollow head body 2 made of a metal such as titanium or stainless steel, and a shaft 4 that supports the head body 2. The hosel 6 of the head body 2 is formed with a shaft hole 8 into which the tip of the shaft 4 can be inserted and fixed.

The head body 2 is formed so that the toe side D1 is heavier than the heel side D2, and the head body 2 is located in the shaft hole 8 positioned at the heel side D2.
About 8% or more of the total weight of is inserted. The total weight of the head main body 2 including the mass body is equally distributed between the toe side D1 and the heel side D2. In this case, the mass difference between the toe side D1 and the heel side D2 of the head main body 2 is preferably set within a range of ± 50% of the mass body.

Here, a method for defining the toe side D1 and the heel side D2 of the head main body 2 will be described. First, in a state where the head main body 2 is set on the reference horizontal plane S, an intermediate point Pm that bisects the highest point T1 and the lowest point T2 of the face surface 10 along the height direction from the reference horizontal plane S.
(That is, an intermediate point where H1 = H2).

Next, a straight line Lm parallel to the reference horizontal plane S is drawn from the intermediate point Pm, and points at which the straight line Lm intersects the toe side edge and the heel side edge of the face surface 10 are determined. In this case, the toe side edge where the straight line Lm intersects is P1, and the heel side edge is P2.

Subsequently, an intermediate point Pc (ie, W1) which bisects a line between the toe side edge P1 and the heel side edge P2.
= W2), a plane L1 passing through the intermediate point Pc and perpendicular to the reference horizontal plane S is set up.

The portion on the arrow D1 side with respect to the surface L1 is defined as the toe side of the head body 2, and the portion on the arrow D2 side is defined as the heel side of the head body 2. In this embodiment, in order to achieve the most effective toe-heel balance,
A toe-side weight body 12 and a heel-side weight body 14 are concentratedly arranged on the most toe side D1 (toe portion) and the most heel side D2 (shaft hole 8) of the head main body 2, respectively.

The toe-side weight member 12 is provided on the most toe-side D1 inside the head main body 2 in advance by projecting an integral or separate weight, and the heel-side weight member 14 is provided.
The shaft hole 8 formed on the heel side D2
And the head body 2 (heel side weight body 1)
No. 4 is not included).

In this case, examples of the mass body usable as the heel-side weight body 14 include various components that can be inserted into the shaft hole 8. For example, the tip of the shaft 4 inserted into the shaft hole 8 (arrow Q in the figure)
The heel-side weight body 14 is made to be thicker by thickening the shaft tip portion 4a) within the range indicated by, or by mixing or embedding a weight at the tip portion of the shaft 4 so that the heel-side weight body 14 is moved to the head body 2. May be configured as a mass body of about 8% or more of the total weight of Further, the weight may be integrally fixed to the outside of the shaft tip portion 4a, or the weight may be put into the shaft hole 8 and then the shaft tip portion 4a may be inserted into the shaft hole 8 so as to be integrally bonded and fixed in the shaft hole 8. Then, the weight body 14 having a mass of about 8% or more of the total weight of the head main body 2 may be used.

In the present embodiment, as one example, the shaft tip 4 of the shaft 4 inserted into the shaft hole 8 is provided.
a, a weight 16 containing tungsten that can be inserted into the shaft tip 4a, and a sole 18 of the head body 2.
The heel side weight body 14 is constituted by a plug 20 provided on the side and filled and solidified with a synthetic resin for closing the shaft hole 8.

The present embodiment can be applied not only to a wood type head body 2 including a driver but also to an iron type head body 2, and in this case, it is applicable to a wood type and an iron type. Although the total weight of the head main body 2 is variously different, when realizing the technical idea of the present invention, the total weight of the head main body 2 is changed to the toe side D1.
And the heel side D2, the toe side weight body 12 and the heel side weight body 14 may be set to the same weight.

For example, assuming that the total weight of the head body 2 (not including the heel side weight body 14) is 170 g, the toe side D1 is 99 g including the toe side weight body 16, the heel side D2 is 71 g, and the toe side weight body is 71%. What is necessary is just to set each of 12 and the heel side weight body 14 to 27 g. In this case, in the heel-side weight body 14, the total weight of the shaft tip 4a and the plug 20 is set to 4 g, and the weight 16 is set to 23 g. This golf club
A toe-side weight body 12 is provided to form a head body 2 having a heavier toe side D1.
The head body 2 is manufactured by a method of inserting a mass body of about 8% or more of the total weight of the head body 2.

According to such a golf club, the most toe side D1 (toe portion) of the head body 2 and the most toe side D1 (toe portion) of the head body 2 are utilized by using the portion of the most heel side D2 (shaft hole 8) which has not been conventionally used. The toe-side weight body 12 and the heel-side weight body 14 can be respectively concentrated on the side D2 (that is, the shaft hole 8), and as a result, the toe-heel balance can be achieved most effectively.

Further, the contour and shape of the outer surface of the head body 2 are broken by retrofitting the heel-side weight body 14 (shaft tip 4a of the shaft 4, weight 16, plug 20) to the head body 2. The toe-heel balance can be easily and accurately adjusted from the outside of the head body without deteriorating the appearance and appearance.

Next, a golf club according to a second embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 2A and 2B, the golf club according to the present embodiment includes a head body 22 without a hosel, and a shaft 24 that supports the head body 22. On the most heel side, there is formed a shaft hole 28 into which the tip of the shaft 24 can be inserted and fixed by bonding or the like.

When the head body 22 is divided into a toe portion D1, a heel portion D2, and a center portion D3 defined between the toe portion D1 and the heel portion D2, the toe portion D1 is formed heavier than the heel portion D2. Have been. Further, a mass body having a weight of about 8% or more of the total weight of the head main body 22 (not including the heel side weight body 34) is inserted into the shaft hole 28 located on the heel side of the heel part D2. .
And the total weight of the head body 2 including this mass body is
The weight of the center portion D3 is set so that the center portion D3 is equally distributed between the toe portion D1 and the heel portion D2. In this case, it is preferable that the mass difference between the toe portion D1 and the heel portion D2 of the head main body 22 be set within a range of ± 50% of the mass body.

Here, a method of defining the toe portion D1, the heel portion D2, and the center portion D3 of the head main body 22 will be described. First, with the head main body 22 set on the reference horizontal plane S, an intermediate point Pm that bisects the highest point T1 and the lowest point T2 of the face surface 30 along the height direction from the reference horizontal plane S. (That is, an intermediate point where H1 = H2).

Next, a straight line Lm parallel to the reference horizontal plane S is drawn from the intermediate point Pm, and points at which the straight line Lm intersects the toe side edge and the heel side edge of the face surface 30 are determined. In this case, the toe side edge where the straight line Lm intersects is P1, and the heel side edge is P2.

Subsequently, trisection points Pc and Pc 'which divide the line between the toe side edge P1 and the heel side edge P2 into three equal parts.
After determining (that is, trisection points where W1 = W2 = W3), planes L1 and L2 passing through these trisection points Pc and Pc 'and perpendicular to the reference horizontal plane S are set up, respectively.

With respect to the surfaces L1 and L2, the portion on the arrow D1 side is defined as the toe portion of the head body 2, the portion on the arrow D2 side is defined as the heel portion of the head body 2, and the range of the arrow D3 is defined as the center portion.

In this embodiment, in order to achieve the most effective toe-heel balance, the toe-side weight members 3 are provided at the most toe side of the toe portion D1 and the most heel side of the heel portion D2, respectively.
2 and the heel-side weight body 34 are respectively concentrated.

The toe side weight body 32 is
The heel side weight body 34 is inserted into the shaft hole 28 formed on the heel side and has a weight of about 8% or more of the total weight of the head body 22. Mass is applied.

In this case, examples of the mass body that can be used as the heel-side weight body 34 include various components that can be inserted into the shaft hole 28. In the present embodiment, as one example, the shaft tip 24a of the shaft 24 inserted into the shaft hole 28, and the shaft tip 24a partially inserted into the shaft tip 24a.
And a stopper 40 provided on the sole 38 side of the head main body 22 and filled with a synthetic resin for closing the shaft hole 28 and solidified to form a heel-side weight body. 34.

The present embodiment is applicable not only to the wood type head body 22 including the driver but also to the iron type head body 22. In this case, the present invention is applicable to both the wood type and the iron type. Although the total weight of the head body 22 is variously different, when realizing the technical idea of the present invention, the total weight of the head body 22 is equally distributed between the toe portion D1 and the heel portion D2.
The weight of the center portion D3 may be set, and the weights of the toe-side weight body 32 and the heel-side weight body 34 may be set to be equal to each other.

For example, assuming that the total weight of the head body 22 (excluding the heel side weight body 34) is 165 g, the toe portion D1 is 75 including the toe side weight body 32 (27 g).
g, the heel portion D2 is set to 50 g, the weight of the center portion D3 is set to 40 g, and the toe-side weight member 32 and the heel-side weight member 34 are each set to 27 g. In this case, in the heel-side weight body 34, the total weight of the shaft tip 24a and the plug 40 is set to 4 g, and the weight 36 is set to 23 g. Note that the weight of the center portion D3 includes the weight of the back weight body 42 (see FIG. 3) provided on the back side of the head main body 22 in the area of the center portion D3. By providing the back weight body 42, the moment of inertia of the head main body 22 can be increased, and the sweet spot can be expanded.

According to such a golf club, the most heel side portion (shaft hole 2) which has not been used conventionally.
8), the most toe side of the toe portion D1 and the most heel side of the heel portion D2 (that is, the shaft hole 2).
8) It is possible to concentrate the toe-side weight body 32 and the heel-side weight body 34 respectively, and as a result,
The most effective toe-heel balance can be achieved,
The golf club has a large moment of inertia and does not shake when hitting a ball.

Further, the heel-side weight body 34 (the shaft tip 24 of the shaft 24) is
a, weight 36, plug 40)
The toe-heel balance can be easily and accurately adjusted from the outside of the head main body without breaking the contour or shape of the outer surface of the head main body 22 or spoiling the appearance.

The shaft hole provided in the head body of the golf club of the present invention is not limited to the embodiment as long as the shaft can be inserted and fixed. Further, the preferred example in which the weights of the toe side weight body and the heel side weight body provided on the toe side, the heel side and the head body of the head body are equal has been described as the embodiment, but the weight is dispersed on the toe side and the heel side. Therefore, the object of the present invention can be achieved even if the weights are not equal.

[0038]

According to the present invention, it is possible to provide a golf club capable of achieving good toe-heel balance by dispersing the weight on the toe side and the heel side of the head body.

[Brief description of the drawings]

FIG. 1 is a view showing a golf club according to a first embodiment of the present invention, wherein (a) shows an external configuration of a head main body, and (b) shows an internal configuration of the head main body. FIG.

FIGS. 2A and 2B are diagrams showing a golf club according to a second embodiment of the present invention, wherein FIG. 2A shows an external configuration of a head main body, and FIG. 2B shows an internal configuration of the head main body. FIG.

FIG. 3 is a cross-sectional view of a head body applied to a second embodiment as viewed from a sole side.

[Explanation of symbols]

 2 Head body 4 Shaft 8 Shaft hole 16 Weight 18 Sole 20 Plug D1 Toe side of head body D2 Heel side of head body

Claims (6)

[Claims] 1. A head main body having a toe side formed to be heavier than a heel side, a shaft supporting the head main body, and provided on a heel side of the head main body, wherein the shaft is inserted and fixed. A possible shaft hole, in which about 8% of the total weight of the head body.
% Of the golf club, wherein the mass of the golf club is not less than 30%. 2. The golf club according to claim 1, wherein a weight difference between a toe side and a heel side of the head body is set within a range of ± 50% of the mass body. 3. A head body, a shaft for supporting the head body, and a shaft hole provided on a heel side of the head body and capable of inserting and fixing the shaft. When the head body is divided into a toe portion, a heel portion, and a center portion between the toe portion and the heel portion, the toe portion is formed to be heavier than the heel portion, and in the shaft hole, About 8% of the total weight of the head body
A golf club having the above mass body inserted therein. 4. The golf club according to claim 3, wherein a weight difference between the toe portion and the heel portion of the head body is set within a range of ± 50% of the mass body. 5. The golf club according to claim 1, wherein the mass body inserted into the shaft hole is constituted by the shaft. 6. The golf club according to claim 1, wherein the mass body inserted into the shaft hole includes the shaft and an additional member provided on the shaft.