KR20080058153A - Wood club head - Google Patents

Abstract

A wood club head is provided to hit a golf ball at the oblique loft angle in the impact sweep track in using a long hosel and to fly a golf ball easily without blowing away the golf ball, by keeping ZG(Centroid Depth) and FP(Face Progression) values low. In a wood club head having the loft angle over 13 degrees, the length of a hosel(2) is over 20mm. FP is set within a range of 12~16mm. ZG is set within a range of 20~25mm. A golfer makes a golf ball fly easily by using the long hosel, but the golf ball is not flown away. The length of the hosel is below 20mm. FP is set within a range of 16~20mm. ZG is set within a range of 25~30mm. The ball is not flown well as the loft angle is set erectly due to the impact down-blow track, by using the short hosel. But, the golf ball spins well by increasing a ZG value.

Description

Wood Club Head {WOOD CLUB HEAD}

The present invention relates to a wood club head having a loft angle of 13 degrees or more, a head called a fairway wood.

Conventional fairway woods use the distance from the face to the center of gravity as the center of gravity depth (ZG), the distance from the shaft axis to the face tip (leading edge) as the face progression (FP), When the length was made into the hosel length, these values were varied in various ways, and the spin amount, the ease of gripping a ball, etc. were designed. The larger the value of ZG, the easier the face is to be lifted by impact, the easier it is to spin, and the ball is more likely to float. The larger the value of FP, the easier the ball floats, but the poorer the ball grip. The loft angle is a measured value of the angle between the shaft and the face surface when the face surface is square, and is the upward angle of the face surface. For a general golfer who does not have a high head speed, it is common to design the ball so that the ball can be held well so that the ball can be spun onto the ball.

As a golf club head which pays attention to FP value, what made FP value into the range of 7 mm or more and 20 mm or less is known (document 1: Unexamined-Japanese-Patent No. 11-178958 (3rd page, FIG. 1)). It is also known to pay attention to the center of gravity depth ZG (Document 2: Japanese Patent Laid-Open No. 2002-210045 (4th page, Fig. 2)).

No golf club heads described in Documents 1 and 2 were designed by combining the lengths of ZG, FP teeth, and hosel of fairway wood to provide a golf club that is easy to hit for a golfer with a high head speed. With only the design of the ZG and FP values to make the ball easier to float, when the golfer with a high head speed hits the ball, the ball is blown and the wind is weak and tends to lose the flying distance.

Accordingly, an object of the present invention is to provide a wood club head that focuses on the length of the hosel, and the ball is easy to float but does not fly when the golfer hits the ball according to the long and short of the hosel. It is done.

In order to achieve the above object, the present invention is a wood club head having a loft angle of 13 degrees or more, the hosel length is formed to 20 mm or more, the face progression (FP value) is set to more than 12 mm and less than 16 mm, The center of gravity depth was set to more than 20 mm and less than 25 mm. Moreover, it is a wood club head with a loft angle of 13 degrees or more, the hosel length is set to less than 20 mm, the face progression (FP value) is set to more than 16 mm and less than 20 mm, and the center of gravity depth is more than 25 mm and less than 30 mm. Set to.

According to the present invention, it is a wood club head having a loft angle of 13 degrees or more, the hosel length is formed to be 20 mm or more, the face progression (FP value) is set to more than 12 mm and less than 16 mm, and the center of gravity depth is more than 20 mm. Since it is set to less than 25 mm, the longer the hosel, the impact becomes the sweep (obtuse angle), the loft angle hits the ball in a tendency to lie down, the ball is easier to float, but does not fly by reducing the ZG and FP value, Strong trajectory can be obtained. It also flies away.

Moreover, it is a wood club head with a loft angle of 13 degrees or more, the hosel length is set to less than 20 mm, the face progression (FP value) is set to more than 16 mm and less than 20 mm, and the center of gravity depth is more than 25 mm and less than 30 mm. In this case, the hosel is shorter, and the impact becomes downblow (acute) in the swing, and the ball becomes difficult to float due to the tendency of the loft to stand up, but the FP value is increased and the ZG is attacked by the opening tendency. The larger the spin, the easier it is to prevent the ball from flying, to obtain a strong trajectory and to fly.

EMBODIMENT OF THE INVENTION Below, preferred embodiment of this invention is described with reference to drawings.

1 and 2 show a side view and a front view of a wood club head having a loft angle of 13 degrees or less, and a hosel 2 is attached to the head main body 1, and a shaft (not shown) is mounted to the head body 1. . The distance from the face surface 3 of the head body 1 to the center of gravity is referred to as the center of gravity depth ZG. The length HL of the hosel 2 refers to the length of the cylindrical portion, and the distance from the shaft axis S to the leading edge 4 is called the face progression FP.

The head main body 1 is made of stainless cast, the volume is in the range of 150 to 250 cm 3, the head weight is in the range of 200 g to 250 g, and from the sole 5 of the head main body 1 When the vertical distance to the center of gravity position CG is referred to as the center of gravity height, the center of gravity height is designed to be 18 mm or less, and the club length is 43 inches or less and the total weight is 300 g or more. ), ZG values (mm) and hosel lengths (mm) were manufactured as the first, second and first to sixth comparative examples, and golfers with head speeds of 45 mm / sec to 50 mm / sec were struck. Each launch angle and spin amount were measured.

Table 1

In Table 1, in the fairway wood of the short hosel (made to 10 mm), it is set to FP large and ZG, and in these groups, it becomes as Table 2, and in the long hosel (made to 30 mm), It was set as FP small and ZG small, and it became as Table 3 in these groups.

[Table 2]

Table 3

In the present invention, when the hosel length HL exceeds 20 mm, the FP value (mm) is 12 <FP <16, and the ZG value (mm) is 20 <ZG <25. (45 m / sec) The golfer was identified as suitable. In addition, in order to make the center of gravity height 18 mm or less, it is preferable to make the hosel length HL maximum 35-40 mm or less. In this case, the hosel 2 can be made of titanium, an alloy thereof, or the like having a specific gravity, so that the center of gravity height can be lowered even if the hosel length HL is increased.

If the hosel length HL is designed with a short hosel of less than 20 mm (0 <H <20), then 16 <FP <20, 25 <ZG <30. For short hosels with 0 <HL <20, the impact is down blow orbit and the loft is upright, making the ball difficult to float, but increasing the FP and ZG causes the ball to float, not fly, and a strong trajectory. . As a result, the flying distance also flies.

The head weight is preferably 190 g or more and the remaining weight (adding tungsten weight or the like to an appropriate site) is 30 g or more, the volume is preferably 150 to 250 cm 3 and the center of gravity height of 18 mm or less. It is preferable that the head main body 1 is stainless casting. In addition, the head volume, the club length, and the total weight of the # 3 to # 5 fairway woods were set as follows, for example, and the respective values of FP and ZG in the case of the short hosel and the long hosel were in the above-described range. .

# 3… 168 cm 3. 42.5 inches 329 g

#4 … 160 cm 3. 42.25 inches 331 g

# 5… 155 cm 3. 42 inches 333 g

1 is a side view showing an embodiment of the present invention.

2 is a front view.

<Explanation of symbols for the main parts of the drawings>

1: head body

2: hosel

3: face face

ZG: Center of gravity depth

FP: Face Progression

HL: hosel length

Claims (2)

Wood club head with a loft angle of 13 degrees or more, The hosel length is formed at 20 mm or more, The face progression is set to more than 12 mm and less than 16 mm, The wood club head which set the center of gravity depth to more than 20 mm and less than 25 mm. Wood club head with a loft angle of 13 degrees or more, Set the hosel length to less than 20 mm, The face progression is set to more than 16 mm and less than 20 mm, The wood club head which set the center of gravity depth to more than 25 mm and less than 30 mm.

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