JP3464745B2 - Golf club head - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow metal golf club head such as a wood golf club head or an iron golf club head. More specifically, the fixing fulcrum between the club head body and the shaft is provided in the club head body. By providing it on the hosel side, the head body itself can be deformed during swinging and ball impact (at the time of hitting) to obtain a high trajectory hitting ball, and it is possible to effectively prevent shaft breakage etc. It is about the head.

[0002]

2. Description of the Related Art Conventionally, a hollow metal golf club head such as a wood golf club head (or an iron golf club head) has a hosel portion 2 of a head body 1 and a crown portion of the head body 1 as shown in FIG. 3, the hosel portion 2 is formed so as to project outward from the crown portion 3 or to project into the head body 1, and the tip side of the shaft 4 is supported and fixed.

[0003]

That is, since the conventional hosel portion 2 is an integral structure connected to the crown portion 3 of the head body 1 and is a so-called completely rigid body, when the golf club swings, At ball impact (when hit)
In the structure, the head body 1 is hardly deformed.

Therefore, the dynamic behavior of the golf club, such as real loft and face angle, is not related to the head body itself, which is a completely rigid body, but to the characteristics of the shaft (for example, bending, twisting, elasticity of the shaft). The reality is that the direction of the hit ball and the sense of stability in the height direction are not affected by the influence of the force). Further, when hitting a ball with a conventional golf club, stress concentrates on the upper end portion of the hosel portion 2 that protrudes outward from the crown portion 3, causing breakage of the shaft 4.

The present invention has been devised in view of such conventional problems, and is stable in the directionality of a hit ball without being affected by the characteristics of the shaft and without giving the head body and the shaft a sense of rigidity. And a high trajectory, and further to increase the loft angle of the club head main body by the shape of the shaft insertion hole formed in the crown portion, and to provide a golf club head that can regulate the toe down amount. To do.

[0006]

In order to achieve the above object, the present invention has a shaft tip inside the club head main body, which extends from the sole side toward the shaft insertion hole formed in the crown part and is separated from the crown part. The gist is that the support member is formed integrally with the sole portion, and the shaft insertion hole formed in the crown portion is formed as a long hole from the face side toward the bag side.

It is also possible to provide a rubber-like elastic support member for elastically supporting the inserted shaft at the peripheral portion of the shaft insertion hole formed in the crown portion. The present invention is configured as described above, and in the metal hollow golf club head, the shaft tip supporting member, that is, the hosel portion is erected on the inner wall surface of the sole portion toward the inside of the hollow portion and separated from the crown portion. When the golf club is swinging or when it hits a ball (when hitting a ball), the head body and the shaft do not have rigidity.
In addition, the head body itself can be deformed to hit the ball without being affected by the characteristics of the shaft (for example, bending, twisting, elastic force of the shaft, etc.), and as a result, stable directionality and high trajectory of the ball can be obtained. Can be done.

Further, by forming the shaft insertion hole formed in the crown portion into a long hole from the face side toward the bag side, the loft angle of the club head is increased to make it easier to raise the ball at the time of hitting. In addition to being able to control the amount of toe down when swinging, it is possible to hit a stable ball. That is, the toe-down amount is the club shaft from the action of the centrifugal force and gravity applied to the club head when the center of the face surface of the club head is aligned with the center of the tee-up golf ball and then the golf club is swung. Is the amount of movement when the center of the face surface of the club head moves inward with respect to the center of the golf ball, that is, when the golf club is swung, the club head is pulled toward the player.

This toe-down amount is such that the position of the center of the face surface of the club head (generally the sweet spot) is a predetermined distance from the address position to the player side (generally 5 mm to the center of the golf ball actually teeed up).
As a result, the toe side of the face surface of the club head is located with respect to the center of the tee-up golf ball, and the ball is hit. Therefore, the direction in which the golf ball is ejected is uncertain, and the player may not fly in the target direction aimed at, or instability may occur.
This is intended to prevent such a phenomenon.

Further, when the position at which the golf ball is hit is deviated due to the toe down phenomenon, the maximum repulsion characteristic of the club head cannot be obtained, and the probability of impairing the flight distance increases. Can be prevented in advance.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted. FIG. 1 is a vertical sectional front view of a head body 1 of a wood golf club showing a first embodiment of the present invention, and FIG. 2 is a plan view of the head body 1. The head body 1 includes a crown portion 3 and a face portion 6.
The sole portion 5 and the sole portion 5 are hollow and integrally formed of a metallic material (for example, titanium or titanium alloy).

A shaft insertion hole 7 for a shaft 4 is formed in the crown portion 3, and an inner wall surface 5a of the sole portion 5 is formed.
Has a shaft tip support member 8 (hosel) that is separated from the crown portion 3 and is formed integrally with the shaft insertion hole 7 formed in the crown portion 3 while protruding from the shaft insertion hole 7. . As shown in FIG. 1, the shaft tip support member 8 is formed in a hollow cylindrical shape, and the hollow cylindrical bottom portion 8a is hermetically sealed or opened. Further, the shaft insertion hole 7 formed in the crown portion 3 has a shaft 4 and a shaft tip support member 8
The diameter of the shaft 4 is larger than the diameter of the shaft surface 6a, and the hole is formed from the side of the face 6a toward the side of the bag 1b of the head body 1 so that the side surface of the shaft 4 does not directly contact the peripheral edge of the shaft insertion hole 7. There is.

A rubber-like elastic support member 9 for effectively preventing the shaft 4 from coming into contact with the peripheral edge of the shaft insertion hole 7 and being damaged at the peripheral edge of the elongated shaft insertion hole 7.
The rubber-like elastic support member 9 is preferably provided with a recess so as to engage with the peripheral edge of the shaft insertion hole 7. Further, the rubber-like elastic support member 9 can also cover the gap between the shaft tip support member 8 and the shaft insertion hole 7, whereby dust, water, etc. can enter the hollow portion 1a of the head body 1. Can be effectively prevented,
It is possible to prevent wind noise when swinging and improve hitting sound to improve feeling.

As described above, in the hollow metal golf club head, the shaft tip support member 8 is attached to the sole portion 5
By erected the inner wall surface 5a toward the inner side of the hollow portion 1a and separating it from the crown portion 3, the head body 1 and the shaft 4 can be configured without giving a sense of rigidity. When swinging the club,
At the time of ball impact (at the time of hitting a ball), the shaft 4 can use the shaft tip support member 8 formed integrally with the sole portion 5 as a fulcrum.

Therefore, when the golf club is swinging,
At the time of a ball impact (at the time of hitting a ball), as shown in FIG. 3, the head body 1 itself is indicated by an arrow X without being affected by the characteristics of the shaft 4 (for example, bending of the shaft, twisting, elastic force, etc.). The ball can be deformed into a ball, and as a result, stable ball directionality and high trajectory can be obtained.

Further, the shape of the shaft insertion hole 7 formed in the crown portion 3 is formed as a long hole from the face surface 6a side toward the bag 1b side of the head main body 1, so that the loft angle of the club head is increased. By doing so, the ball can be raised more easily when hitting, and the amount of toe down at the time of swinging can be regulated so that a stable hit can be hit.

Further, since the rubber-like elastic supporting member 9 for elastically supporting the shaft 4 and the shaft tip supporting member 8 is provided on the peripheral portion of the shaft insertion hole 7 formed in the crown portion 3, the swing of the golf club is provided. The shaft 4 can be effectively prevented from being broken at the time of ball impact. Although the head main body 1 of the wood golf club has been described in the above embodiment, the present invention can be applied to the club head of an iron golf club.

[0018]

As described above, according to the present invention, the shaft tip support member, which is separated from the crown portion, is provided inside the club head body from the sole portion side toward the shaft insertion hole formed in the crown portion. Since the shaft insertion hole formed integrally and formed in the crown portion is formed as a long hole from the face side toward the bag side, the following excellent effects are exhibited. ． The head body itself can be deformed to hit the ball without being affected by the characteristics of the shaft (for example, bending, twisting, elastic force of the shaft, etc.), and as a result, stable directionality and high trajectory of the ball can be obtained. . ． At the time of swinging a golf club or at the time of ball impact (at the time of hitting a ball), the head body itself can be deformed and hit without being affected by the characteristics of the shaft (for example, bending, twisting, elastic force of the shaft). As a result, it is possible to obtain a stable hitting direction and a high trajectory. ． By forming the shaft insertion hole formed in the crown portion into a long hole from the face side toward the bag side, it is possible to increase the loft angle of the club head to make it easier to lift the ball at the time of hitting and to swing. The amount of toe down at the time can be regulated, and a stable ball can be hit. ． Since the rubber-like elastic support member 9 is provided in the peripheral portion of the shaft insertion hole formed in the crown portion, it is possible to effectively prevent the shaft from being broken at the time of swinging the golf club or at the time of ball impact, and in the hollow portion of the head body. It is possible to prevent foreign matter such as dust and water from entering, further prevent wind noise when swinging and improve hitting sound to improve feeling.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a head body of a wood golf club showing a first embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an explanatory diagram showing a deformed state of the head main body at the time of swinging the golf club and at the time of ball impact.

FIG. 4 is a vertical sectional front view of a head body of a conventional wood golf club.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Head main body 1a Hollow part of head main body 1b Bag side 2 Hosel part 3 Crown part 4 Shaft 5 Sole part 5a Inner wall surface 6 of sole part 6 Face part 6a Face surface 7 Shaft insertion hole 7a Engagement recessed part 8 Shaft tip support member 8a Shaft Bottom part of tip support member 9 Rubber-like elastic support member

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A63B 53/02 A63B 53/04

Claims (2)

(57) [Claims] 1. In a hollow metal golf club head, a shaft tip support member, which is separated from the crown portion, is provided inside the club head body, from the sole portion side toward a shaft insertion hole formed in the crown portion. A golf club head, characterized in that the shaft insertion hole formed integrally with the crown portion is formed as a long hole from the face side toward the bag side. 2. The golf club head according to claim 1, wherein a rubber-like elastic support member that elastically supports the inserted shaft is provided at a peripheral edge portion of the shaft insertion hole formed in the crown portion.