JP2764886B2 - 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 so-called wood club in which the sole width is equal to or greater than the face height and the head is made of a metal or a fiber-reinforced plastic (FRP) or the like or an outer shell structure in which these are combined. More particularly, the present invention relates to a golf club head having a face surface reinforced.

[0002]

2. Description of the Related Art Conventionally, a golf club head of this type has a hollow or a foam material, so that a rib is provided inside the face from the crown to the sole to reinforce the face. It was attached. is there
As described in JP-B-53-40380,
At the center of the face, near the sole,
And extends to the back of the crown, including this border
One with a relatively large plate-shaped rib is also known.
Was.

[0003]

In golf club heads, it is required to increase the sweet area in order to extend the flight distance, and therefore it is necessary to increase the face area. However, if the face area is increased with the conventional structure, the head becomes large, the head weight becomes too heavy, and it becomes difficult to shake off the club.

Accordingly, an object of the present invention is to provide a golf club head which can increase the face area without increasing the head weight and reinforce the face surface, thereby increasing the flight distance. .

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a sole for a sole having a sole width equal to or greater than a face height.
The wood type is thicker than the crown part.
In a golf club head in which the head is made of a simple substance such as metal or fiber reinforced plastics (FRP) or an outer shell structure in which these are combined, an upper part on the inside of the face of the head and a face on the side of the face inside the crown part. A rib is provided only between the ends and the width of the face-side joint and the crown-side joint of the rib is 2 mm or more and 15 mm or less, respectively, and the thickness of the rib is 0.5 mm or more and 5 mm or less. Things. Also, place the rib evenly behind the face
A plurality is provided at intervals.

[0006]

The rib on the inner side of the face is provided to protect the face from the impact at the time of hitting the ball. Therefore, it is sufficient that the face surface is provided with the minimum reinforcement for maintaining the strength, and the reinforcement beyond necessity simply increases the head weight. However,
Joint between the face and the sole portion, the rib of this portion since the thickness of the sole portion is thicker than the crown part is superfluous, in which only increase the head weight. Then, the inventor examined the relationship between the face surface strength and the rib reinforcement, and found that only between the inside of the face surface of the head and the face surface side end inside the upper crown portion,
The width of the joints is 2mm or more and 15mm or less, and the thickness of the ribs is 0.5mm or more and 5mm or less. The ribs on the side of the face side are eliminated to maintain the strength of the face side. It has been found that a golf club head which does not increase the head weight even when the face area is increased while increasing the face area can be obtained. If the width of the joint is less than 2 mm or the thickness is less than 0.5 mm, the strength is insufficient and the role of the rib cannot be fulfilled, and the width of the joint is longer than 15 mm. Thickness 5
If the thickness is larger than mm, the weight of the rib increases and the center of gravity cannot be lowered.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

The golf club head shown in FIG. 1 is a golf club head having a sole width equal to or greater than the face height and the entire head having a shell structure of a magnesium alloy. The face 1 of the head has a thickness of 3.5 mm, and the sole 2 has a thickness of 5 mm, which is a low center of gravity. In addition, the crown 3 which does not require strength has a thickness of 1 mm.
mm for weight reduction. A triangular rib 4 having 10 mm long sides and a thickness of 1 mm, two sides each serving as a joint portion, is provided only between the upper portion inside the face surface 1 and the end portion on the face surface 1 side inside the crown portion 3. Were inserted at a pitch of 10 mm centering on the face center. The shape, pitch, and number of the ribs 4 are not limited to these, and may be selected so that there is no problem in the face strength in relation to the size of the ribs 4.

As a result of reducing the size of the rib 4 in this manner,
It is possible to reduce the weight by about 30 g as compared with the case where the ribs 4 are attached to the entire portion from the crown portion 3 to the sole portion 2. Could be offset.

FIG. 2 shows a club head having an enlarged face area and a lower center of gravity in this manner. The club area can be increased by 20% in the face area as compared with the conventional club head, and the center of gravity G is also 4 degrees from the position of the conventional center of gravity G '. .6mm was able to be lowered. The maximum head width W is 85 mm or more, and the maximum head height H is 48 mm.
It was above. Further, the head volume was set to more than 260 cc.

The golf club head was hit with 3000 golf balls at a speed of 50 m / s, but there was no abnormality on the face surface and no problem in strength.

[0012]

As described above, according to the present invention, a rib is provided only between the upper portion inside the face surface of the head and the end of the face area inside the crown portion, and the face surface of the rib is provided. The width of the side joint and the crown surface side joint is 2 mm or more and 15 mm or less, respectively, and the thickness of the rib is 0.1 mm or less.
Since it is 5 mm or more and 5 mm or less, it is possible to eliminate the rib on the sole portion side of the face surface, to increase the face area while maintaining the strength of the face surface without increasing the head weight, and to increase the size of the head. Can increase the flight distance.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view.

FIG. 2 is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Face surface 2 Sole part 3 Crown part 4 Rib

Claims (2)

(57) [Claims] 1. A sole portion having a sole width equal to or greater than a face height.
A golf club head having a thicker wood type than the crown portion, and a head made of a single body such as metal or fiber reinforced plastics (FRP) or an outer shell structure in which these are combined. Wherein a rib is provided only between the upper part on the inside of the face of the head and the end on the face side inside the crown, and the width of each of the face-side joint and the crown-side joint of the rib is 2 mm. A golf club head having a thickness of not less than 15 mm and a thickness of a rib of not less than 0.5 mm and not more than 5 mm. 2. The method according to claim 1, wherein the ribs are arranged at equal intervals behind the face.
2. The golf club according to claim 1, wherein several golf clubs are provided.
Love head.