JPH05337220A - Golf club head - Google Patents

Abstract

PURPOSE:To provide a golf club head having a deviation control function especially in a left and a right directions (direction for running along the ball hitting face) of the head. CONSTITUTION:The head of the golf club is provided with air flow guide grooves 7a, 7b which extend from the ball hitting face 2 side of the head 1 to a head rear end part side and thrust through to the rear from the head rear end part, on the sole face 4 for constituting the bottom face of the head 1 of the golf club, and constituted so that groove width of the air flow guide grooves 7a, 7b becomes smaller in the head rear end part side than in the ball hitting face side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a golf club head, and more particularly to the structure of the sole surface side which constitutes the bottom surface of the head.

[0002]

2. Description of the Related Art In a conventional golf club head, the sole surface is formed into a substantially flat shape. Such a head essentially does not have a function of correcting the shake when the shake occurs in the left-right direction during the swing of the golf club, that is, when the shake occurs in the direction along the hitting surface.

[0003]

However, when the head is shaken in the left-right direction (the direction along the ball striking face) as described above, the golf ball does not hit the sweet spot on the ball striking face, or the rear end of the head is lost. When the section shakes in the left-right direction, the hit ball deviates from the target direction to the left-right direction. Therefore, as a golf club head,
It is desired to have a stable one without the above-mentioned left / right blurring, but there is no one having such a function of correcting (regulating) the left / right blurring.

It is an object of the present invention to provide a novel golf club head having the above-described function of restricting the lateral blurring of the head.

[0005]

According to the present invention which is directed to this object, a sole surface which constitutes a bottom surface of a head of a golf club extends from a ball hitting surface side of the head toward a head rear end side thereof. The air flow guide groove is provided so as to extend rearward from the portion, and the groove width of the air flow guide groove is smaller on the head rear end side than on the ball striking face side.

It is desirable that the airflow guide grooves are formed so that the width of the airflow guide grooves becomes gradually smaller toward the rear end of the head, and at least one pair of them is arranged in the direction along the ball striking face. desirable.

[0007]

In the head of such a golf club,
With the golf club swing, in the air flow guide groove,
An air flow that flows from the ball striking surface side along the air flow guide groove and flows out rearward from the head rear end side of the rear air flow guide groove is generated. Since the air flow guide groove has a smaller groove width on the head rear end side than on the ball striking face side, the air flow in the air flow guide groove is compressed on the head rear end side and becomes higher in pressure. Becomes If the rear end of the head tries to shake in the left-right direction, that is, in the direction along the ball striking surface, the high-pressure portion in the airflow guide groove regulates it, so the shake of the head in the left-right direction is regulated. ..

Further, since the air flow guide groove extends rearward on the rear end side of the head, the air flow generated in the air flow guide groove also directly moves rearward from the air flow guide groove. As a result, a number of rectified air flows corresponding to the number of the air flow guide grooves are generated. This air flow is
With respect to the movement of the side wall of the air flow guide groove to the left and right with respect to the air flow, the movement of the head is restricted, so that the left and right deviation of the head is also restricted. That is, the function of the high-pressure portion and the function of the rectified air flow act synergistically to more strongly prevent the head from moving in the left-right direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a golf club head according to an embodiment of the present invention. In FIG. I, reference numeral 1 denotes the entire head of the golf club. The material of the head 1 is not particularly limited, and metals such as stainless steel, aluminum alloy, titanium alloy, beryllium copper, carbon fiber reinforced resin, whisker reinforced resin made of other fibers, and even persimmon (wood) can be used. You can select from the material. In addition, a lightweight resin, a metal plate having a large specific gravity, or the like may be embedded in the head 1 in order to adjust the weight of the head or the balance of the head.

The head 1 has a ball striking face 2 provided on the front surface,
It has a top surface 3 and a sole surface 4 on the bottom side, and generally has a rear end portion 5.
The side is curved in a substantially arc shape. Reference numeral 6 indicates a neck portion to which a shaft (not shown) is attached, and 6a indicates a hole for inserting the shaft.

An air flow guide groove 7a extending from the ball striking face 2 side of the head 1 toward the head rear end portion 5 side and penetrating rearward from the head rear end portion 5 is formed on a sole surface 4 constituting the bottom surface of the head 1. , 7b are provided. Air flow guide groove 7
A portion between a and 7b is formed in a bank-shaped portion 8 composed of the sole surface 4, and the bank-shaped portion 8 is located at a substantially central portion in the direction along the ball striking face 2.

In this embodiment, the air flow guide grooves 7a and 7b are provided.
Are arranged substantially symmetrically with respect to the bank-shaped part 8 in the direction along the ball striking face 2, but two or more pairs or 1 in the central part are arranged.
You may make it arrange | position only a book.

The airflow guide grooves 7a and 7b have a groove width
The head rear end portion 5 side is formed to be smaller than the hitting surface 2 side. In the present embodiment, the groove width is formed so as to become smaller toward the head rear end portion 5 side. In addition to the groove shape of the present embodiment, for example, only the portion on the ball striking face side of the air flow guide groove or the middle portion is formed in a tapered shape so that the groove width is gradually narrowed, and a certain portion (for example, the rear end portion of the groove) is formed. The portion) may be formed to have a constant groove width.

In this embodiment, as shown in FIG.
The air flow guide grooves 7a and 7b are formed such that the groove depth is deeper from the ball striking face side end edge 9 to the rear end side edge 10 toward the head rear end 5 side.

The cross-sectional shape of the air flow guide grooves 7a and 7b is not particularly limited, but, for example, as shown in FIG.
The groove may have a substantially arc shape having a and 11b.

The operation of the embodiment apparatus thus configured will be described. As shown in FIG. 4, along with the swing of the golf club, the air flow guide grooves 7a and 7b are moved from the edge 9 on the ball striking face side of the air flow guide grooves 7a and 7b to the air flow guide groove 7a.
An airflow 12 that flows into the insides a and 7b, flows along the airflow guide grooves 7a and 7b along the airflow guide grooves 7a and 7b, and exits rearward from the rear end side edge 10 is generated.

Since the widths of the air flow guide grooves 7a and 7b become smaller toward the head rear end portion 5 side, the air flow 1
In the air flow guide grooves 7a and 7b, the pressure of 2 becomes higher as it approaches the rear end portion 5 of the head. In other words, on the rear end side of the head,
The high voltage part A is generated. The pressure of the high-pressure portion A becomes higher than the pressure on both sides of the head 1 on the head rear end portion 5 side, and when the head rear end portion 5 attempts to shake in the left-right direction 13 (direction along the ball striking face 2), Acts as a force that naturally corrects. Therefore, the horizontal blurring of the head 1 is restricted.

Particularly in this embodiment, since the pair of air flow guide grooves 7a and 7b are symmetrically arranged, the forces of the high pressure portion A generated in both air flow guide grooves 7a and 7b are balanced, and The blur is surely regulated.

Further, since the generated air flow 12 directly penetrates to the rear of the head 1, the air flow guide groove 7 is formed.
An air stream 12 rectified by a and 7b is generated along the head 1 in the swing. This rectified air flow 12
Acts to relatively restrict the movement of the side walls 11a and 11b in the left-right direction of the head with respect to the side walls 11a and 11b of the air flow guide grooves 7a and 7b. Will be regulated.

Therefore, due to both the function of the high pressure section A and the function of the rectifying air flow 12, the head 1 in the left-right direction 1
The blurring of 3 is regulated, and the target head trajectory can be reliably obtained.

[0021]

As described above, according to the head of the golf club of the present invention, the head sole surface is provided with the air flow guide groove having a narrower groove width on the rear end side so as to pass through the rear. The horizontal deviation of the head can be effectively controlled by the high-pressure portion generated in the air flow guide groove, and further by the air flow rectified by the air flow guide groove, and a target without left and right deviation can be obtained. It is possible to accurately obtain a stable head trajectory.

[Brief description of drawings]

FIG. 1 is a bottom view of a golf club head according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of the head of FIG.

3 is a cross-sectional view of an airflow guide groove of the head of FIG.

FIG. 4 is a bottom view for explaining the operation of the head of FIG.

[Explanation of symbols]

 1 head 2 ball striking face 3 top face 4 sole surface 5 head rear end 7a, 7b air flow guide groove 9 air striking face side edge of air flow guide groove 10 air flow guide groove rear end side edge 12 air flow

Claims (3)

[Claims] 1. An airflow guide groove extending from the ball striking surface side of the head toward the rear end portion of the head and extending rearward from the rear end portion of the head is provided on a sole surface which constitutes the bottom surface of the head of the golf club. A golf club head characterized in that the width of the air flow guide groove is smaller on the head rear end side than on the ball striking face side. 2. The head of a golf club according to claim 1, wherein the groove width of the air flow guide groove is gradually reduced toward the rear end side of the head. 3. The golf club head according to claim 1, wherein at least one pair of the air flow guide grooves are arranged in a direction along the ball striking face.