JPH10290852A - Wood club of golf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably lengthen a carry of a golf ball by the same hitting power as usual regardless of whether or not a player excels in a technique of golf. SOLUTION: A cylinder member 4 on which the cylinder axis passes through a sweet spot area by crossing at a right angle to a sweet spot surface, is arranged in a club head 1 of a wood club having a metal face 2 on a ball hitting surface of the club head 1, and a weight 5 having large mass is almost densely enclosed inside this cylinder member 4 so as to be slidable in the cylinder axis direction. Therefore, the large moment of inertia of the weight 5 having large mass is imparted, as if further pursued, to a golf ball hit hard by the club head 1, and the golf ball can be hit by unusual strong power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf wood club having a metal face on a ball striking surface of a club head.

[0002]

2. Description of the Related Art A wood club having a metal face on a ball striking surface of a ball, a literal wood club having a metal face on a ball striking surface of a wooden club head, and a hollow club having a ball striking surface side opened. There is a so-called metal wood club with a metal face that closes the opening of the metal head of the so-called metal wood club.Beginners and powerless golfers can determine how far the ball travels by the wood club on tee shots and fair shots. Struggling to stretch. Alternatively, among golfers skilled in golf technology, there are many golfers who ultimately aim to increase the flight distance, and a proposal of a wood club that can increase the flight distance apart from technology is awaited. It was.

In order to meet such a demand, for example,
In order to increase the moment of inertia of the club head, a plurality of weights having a large mass are dispersedly provided on the sole of the club head, or the club shaft has good flexibility so that a strong impact force can be exerted at the time of impact. Wood clubs made of carbon have been proposed.

[0004]

However, in the case where a plurality of weights are provided on the sole, the moments of inertia of the weights are slightly different due to the difference in the distance from the grip of the shaft to the individual weights. However, there is a problem that the club head easily swings at the moment of impact when the golf ball is hit. On the other hand, in the case of a club shaft having high flexibility, a high level of skill is required for the swing, and it is only expensive for a beginner golfer, and it is difficult to use up a wood club. It did not lead to an increase in flight distance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to prevent the club head from swinging during a swing, and to increase the flight distance apart from the technique. The point is to provide a wood club that can be extended to

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a wood club having a metal face on a ball striking surface of a club head. It is characterized in that a cylindrical member passing through a sweet spot area is provided orthogonally to the cylindrical member, and a weight having a large mass is slidably and closely built in the cylindrical axis direction inside the cylindrical member.

[0007] According to the above configuration, when shifting from setup to swinging down the head, the weight having a large mass is located at the rear side of the head of the tubular member. Then, when the club head hits the golf ball, at the moment of the impact, the weight having a large mass hits the sweet spot area on the back surface of the metal face with a large moment of inertia.

Here, as is apparent from slow motion photography, a golf ball hit with a club head has its hitting surface compressed and deformed, and comes into a state of being immediately in close contact with the face. A large moment of inertia due to the weight is imparted to the golf ball through the metal face so as to further hit the golf ball, so that the golf ball receives an unprecedented impact force.

That is, even a beginner who hits the golf ball at or near the sweet spot of the club head can easily hit the golf ball with an unprecedented hitting force by an easy technique. According to this, the flying distance of the golf ball can be significantly increased without requiring a difficult technique, and one of the weights is provided on the club head as a weight for increasing the flying distance. Therefore, it is difficult for the head to swing at the moment of impact.

[0010] Preferably, a lubricating oil is supplied to the inside of the cylindrical member so that lubricating oil can be supplied to the inside of the cylindrical member at the time of maintenance of the club or the like so that the weight can slide smoothly. Further, it is also possible to form a ridge on the inner surface of the cylindrical member or the outer surface of the weight to reduce the sliding contact area of the weight with the inner surface of the cylindrical member in the slide axis direction of the weight, in order to ensure smooth sliding of the weight. Is preferred.

Further, if the weight is composed of columnar lead and a shape retaining member that covers the entirety of the columnar lead and keeps its shape, the weight can be made large while the shape is small. It is preferable to be able to
If the shape-retaining portion covering at least the face side of the shape-retaining member is made of metal, and a central portion on the face side is bulged with a projection having a small contact area with the face back surface,
A large moment of inertia due to the weight can be concentrated at the center of the sweet spot on the back of the face, especially when the golf ball is caught at the center of the sweet spot and hits, the flight distance of the golf ball further increases dramatically There are advantages.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a head portion of a wood club, and the wood club has a metal face 2 attached to a ball striking surface of a wooden club head 1.
As shown in FIG. 2, the wooden club head 1 has a circular recessed hole 3 with its rear end closed so as to open the ball striking surface side thereof. And the hole axis of the recessed hole 3 is made to pass through the center of the sweet spot perpendicular to the sweet spot surface of the wood club itself.

A metal member 4 made of a metal, preferably lightweight and high-strength, such as titanium, is inserted into the recess 3 so that the opening at the rear side of the head is closed at the bottom of the recess 3. In addition to being fitted closely, the detent tongues a, a provided continuously with the tubular member 4 are engaged with the concave portions b, b formed on both sides of the recessed hole 3 of the club head 1. In addition, a weight 5 having an outer diameter slightly smaller than the inner diameter of the cylindrical member 4 and having a large mass is incorporated so as to be slidable in the axial direction of the cylindrical member, and the weight 5 is prevented from coming off. The metal face 2 is screwed to the ball striking surface side of the head 1.

Here, the ball striking surface of the metal face 2 is generally formed so as to bend toward the center or slightly forward, so that the area of the sweet spot is also very small. Therefore, to make the hole axis perpendicular to the sweet spot plane means to make it perpendicular to the micro sweet spot plane at the center of the sweet spot. The axis is also orthogonal to the sweet spot plane through the sweet spot center.

Numeral 6 in the drawing denotes a lubricating means for the inside of the cylindrical member 4 which forms a lubricating oil supply hole d on the peripheral surface of the cylindrical member 4, while the lubricating oil supply hole d is also formed in the club head 1. A continuous oil supply hole e is formed, and a plug f such as felt for impregnating oil is provided in the oil supply hole e on the side of the club head 1 so as to impregnate the oil. By supplying lubricating oil to the inside, smooth sliding of the weight 5 in the cylinder axis direction can be expected.

The weight 5 may be made of metal, for example, an iron material. In this embodiment, the weight 5 can be reduced in shape and the weight can be increased. The weight 5 is mainly composed of lead. Specifically, since lead is easily deformed by receiving an external force, the weight 5 is covered with the columnar lead 7 and the entire columnar lead 7. It is made up of a shape retaining member 8 made of metal such as iron or brass, which retains its shape.

According to the wood club having the above-described configuration, as shown in FIG. 2, the transition from the set-up to the swing down of the head is performed until the club head 1 hits the golf ball A. Large weight 5
Is located on the rear side of the head of the cylindrical member 4,
At the moment when the club head 1 hits the golf ball A,
The swing-down speed of the weight 5 is faster than the swing movement of the club head 1, and as shown in FIG. 4, the weight 5 having a large mass hits the sweet spot area on the back of the metal face 2 with a large moment of inertia. Become.

On the other hand, when the club head 1 hits the golf ball A, the golf ball A receives a strong hitting force at the moment of its impact, and its hitting surface is compressed and deformed as shown in FIG. The deformed surface portion is instantaneously brought into close contact with the face 2, and here, the golf ball A is in a state of receiving a strong hitting force and in close contact with the face 2.
As shown in FIG. 4,
When a large moment of inertia due to the weight 5 is applied to the golf ball A through the metal face 2, the golf ball A receives an unprecedentedly strong impact force.

That is, even a beginner who only hits the golf ball A at or near the sweet spot of the club head 1 can hit the golf ball A with an unprecedented hitting force by an easy technique. According to the wood club, the flight distance of the golf ball A can be significantly increased without requiring a difficult technique, and one of the weights 5 for increasing the flight distance in this manner is used. Is merely provided on the club head 1, so that the head does not easily oscillate at the moment of impact.

In the above embodiment, the columnar lead 7 of the weight 5 is covered with a metal shape retaining member 8 made of metal such as iron or brass which is hardly deformed even when subjected to an external force, as shown in FIG. As described above, the shape-retaining portion 8a covering the face side of the shape-retaining member 8 may be made of metal, and the remaining shape-retaining portion 8b may be made of a synthetic resin. The same applies to the case where the entire member 8 is made of metal. However, as shown in the figure, a metal projection h having a small contact area with the back surface of the face is expanded at the center of the shape-retaining member 8 on the face side. If a large moment of inertia caused by the weight 5 is concentrated on the back surface of the metal face 2, the golf ball A can be further hit, particularly when the golf ball A is caught and hit at the center of the sweet spot. The advantage is that it can be dramatically increased . In order to exert the same effect, a sphere (ball) may be employed instead of the weight 5 in a column shape.

The lubrication means 6 is provided for smooth sliding of the weight 5, but in addition to the provision of the lubrication means 6, or in addition to the provision of the lubrication means 6, FIG. On the inner surface of the tubular member 4 or
As shown in FIG. 7, on the outer surface of the weight 5, a number of ridges i for reducing the sliding contact area of the weight 5 with the inner surface of the cylindrical member 4 are provided at intervals in the circumferential direction in the sliding axis direction of the weight 5. It is also preferable to form
As shown in FIG. 5, when the shape-retaining portion 8b of the shape-retaining member 8 is made of a synthetic resin, the ridge i is integrally formed with the shape-retaining portion 8b of the synthetic resin, thereby reducing the cost. It is possible to down.

Further, in the above-described embodiment, a literal wood club in which a metal face is provided on a ball striking surface of a wooden club head has been described. However, a hollow metal head having a ball striking surface side opened is provided. A so-called metal wood club provided with a metal face so as to close the opening thereof is provided, and a tubular member is provided in a club head thereof with the head rear side closed, and the inside of the tubular member is provided. Even if a weight having a large mass can be slid in the direction of the cylinder axis and built in closely, the flying distance of the wood club can be drastically increased apart from the technology.

[0023]

As described above, the present invention focuses on the point that the golf ball instantaneously adheres to the face at the moment of impact of the golf club hitting the golf ball. A weight with a large mass was provided so as to be slidable in the swing direction.According to the wood club having such a configuration, the golf ball was hit hard by the club head, and at the moment of impact when the golf ball was in close contact with the face, The golf ball is hit with a large moment of inertia of a heavy weight through the metal face so that the golf ball is hit by an unprecedented hit force.

That is, even a beginner who only hits the golf ball at or near the sweet spot of the club head can easily hit the golf ball with an unprecedented hitting force by an easy technique.
Since the distance of the golf ball by the wood club can be greatly increased, and only one of the weights is provided on the club head as a weight for increasing the distance, the head at the moment of impact is provided. It is possible to provide a wood club with excellent flight distance, which is particularly good news for beginners and powerless golfers, or good news for golfers who are skilled in golf technology.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a head portion of a literally wooden wood club.

FIG. 2 is a cross-sectional view of a club head showing a state immediately before a golf ball is hit.

FIG. 3 is an explanatory diagram showing a state at the moment of hitting a golf ball with a club head.

FIG. 4 is an explanatory view showing a state in which a golf ball is hit by a weight.

FIG. 5 is a sectional view showing another embodiment of the weight.

FIG. 6 is a cross-sectional view showing another embodiment of a tubular member having a ridge formed on an inner surface.

FIG. 7 is a side view showing another embodiment of a weight having a ridge formed on an outer surface.

[Explanation of symbols]

1: club head, 2: metal face, 4: tubular member,
Reference numeral 5: weight, 6: oil supply means, 7: columnar lead, 8: shape retaining member, h: protrusion, i: ridge.

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[Procedure amendment]

[Submission date] July 5, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction contents]

In the above embodiment, the columnar lead 7 of the weight 5 is covered with a metal shape retaining member 8 made of metal such as iron or brass which is hardly deformed even when subjected to an external force, as shown in FIG. As described above, the shape-retaining portion 8a covering the face side of the shape-retaining member 8 may be made of metal, and the remaining shape-retaining portion 8b may be made of a synthetic resin. The same applies to the case where the entire member 8 is made of metal. However, as shown in the figure, a metal projection h having a small contact area with the back surface of the face is expanded at the center of the shape-retaining member 8 on the face side. If a large moment of inertia caused by the weight 5 is concentrated on the back surface of the metal face 2, the golf ball A can be further hit, particularly when the golf ball A is caught and hit at the center of the sweet spot. The advantage is that it can be dramatically increased . In order to achieve the same effect, a spherical body (ball) may be employed instead of the columnar lead 7 of the weight 5 in the form of a column .

Claims (5)

[Claims] 1. A golf wood club provided with a metal face on a ball striking surface of a club head, wherein a cylindrical member having a cylindrical axis orthogonal to the sweet spot surface and passing through a sweet spot area is provided in the club head, A wood club for golf, wherein a weight having a large mass is slidably and closely embedded in the cylinder axis direction inside the cylinder member. 2. The golf wood club according to claim 1, further comprising means for supplying lubricating oil to the inside of the cylindrical member. 3. An inner surface of a tubular member or an outer surface of a weight,
3. The golf wood club according to claim 1, wherein a ridge for reducing a sliding contact area of the weight with the inner surface of the cylindrical member is formed in a direction of a sliding axis of the weight. 4. The golf wood club according to claim 1, wherein the weight comprises a columnar lead and a shape retaining member which covers the entire columnar lead and retains its shape. 5. A shape-retaining portion covering at least the face side of the shape-retaining member is made of metal, and a projection having a small contact area with the back surface of the face is bulged at the center of the face side. Item 6. A golf wood club according to item 4.