JP2929587B2 - Iron type golf club set - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron type golf club set such as an iron golf club and a pitching golf club.

[0002]

Golf clubs are composed of a head and a shaft, and are generally classified into three types: wood, iron and putter. Irons are categorized by loft angle (loft angle). Irons having a small loft angle (for example, 20 to 30 degrees) are called long irons, and irons having a large loft angle (for example, 40 to 50 degrees) are called short irons. Normally, irons are numbered from long iron to short iron, for example, 1, 2, 3, 4, 5
No. 6, No. 6, No. 7, No. 8, No. 9, PW (Pitching Wedge) and the like.

[0003] Such iron heads include a head having a front face and a back face for hitting a golf ball (iron with a cavity back) and a head with a smooth back (iron with a solid back). The face has an area called a sweet spot.

[0004] In an iron, the weight of the outer peripheral portion of the head is adjusted so that the center of gravity of the head matches the geometric center of the face or the expected position of the ball impact. Is disclosed.

Since the iron face has a loft angle as described above, a long iron having a small loft angle has a small area of the face, while a short iron having a large loft angle and PW have an area of the face. Was getting bigger. Conventional Examples 1 to 4 in Table 1 below show the area of the face with reference to the pitching wedge. The area of the face in Table 1 indicates a plane portion excluding a curved surface portion for connecting a hosel formed on the heel side of the head as described later.

[0006]

[Table 1]

When the face area of the iron is greatly changed in this way, the correlation position between the ball and the face at the time of a shot tends to change, and as a result, the feel at impact tends to be different from each other. There was a problem that it was difficult.

Accordingly, an object of the present invention is to solve the above-mentioned problem and to provide an iron-type golf club set having a common feel.

[0009]

SUMMARY OF THE INVENTION According to the present invention, there is provided an iron-type golf club comprising a first to ninth iron and a pitching wedge having a face connected to a shaft having a face and a hosel provided on a side thereof. in the set, the area of the No. 1 to 9 iron face formed in an area substantially the same of the pitching wedge, the head
By forming a plurality of dents on the rear surface densely by forging, the relative positions of the ball and the face at the time of a shot can be substantially matched, and the same hit feeling can be obtained regardless of the count.

The present invention described in claim 2 is the first to ninth aspects of the present invention.
The ratio of the area of the face of the iron is the pitching wedge
Within -10% based on the area of the face
By doing so, the same hit feeling can be obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The metal head 1 has a hosel 3 which is a mounting portion of the shaft 2 protruding from the-side, and a face 4 which is a striking surface is formed on the front surface. Further, on the rear surface 1A of the head 1, a plurality of depressions 5 are formed relatively densely in a staggered manner corresponding to the face 4, and an annular projection 6 is formed on the edge of the rear surface 1A. A sole 7 is formed by the lower part of the annular projection 6. The depression 5 has a diameter X of 3 to 8 mm, preferably 5 to 6 mm, and a depth Y of 0.2 to 1.7 mm, preferably 0.7 to 1.2 mm. Further, the distance Z between the centers of the adjacent depressions 5
Is 3 to 10 mm, preferably 5 to 7 mm, and the ratio of the area occupied by the dent 5 in the flat portion described later is 70
% Or more is preferable. Reference numeral 8 denotes a groove formed in the face 4 called a score line, and reference numeral 9 denotes a heel of the head 1.

Further, the head 1 has a loft angle A and a club length H according to the type of iron as shown in Table 2.
Having.

[0013]

[Table 2]

Further, in each of the above-mentioned irons, the area of the face 4 of the PW No. 1 to No. 9 is set to be substantially the same as shown in the embodiment according to the present invention in Table 1. In addition, the area of the face 4 in Table 1 is the flat part 4 excluding the curved part 4A for connecting the hosel 3 formed on the heel 9 side.
B is shown. That is, when the area of the pitching wedge is set as a reference (100%), 90% or more for Nos.
It has 100%, preferably 93% to 100%.

Next, the manufacturing method will be described. For example, J
As shown in FIG. 5, the face 4 and the metal such as titanium, titanium alloy, beryllium copper, etc. are hot or cold forged by using a forging device. An annular projection 6 on the rear surface 1A and a flat portion 11 formed on the center side of the rear surface 1A are formed.
In the case of steel, hot forging is performed and then annealing is performed. Next, the head body 1 is placed on a lower die 12 of a forging device, and a hemispherical projection 14 for forming the plurality of depressions 5 is formed on the lower surface of the upper die 13. Then, the upper die 13 is pressed against the flat portion 11 and a plurality of the dents 5 are simultaneously formed by cold forging. In the embodiment, the depression 5
Was formed by cold forging, but may be formed by hot forging with steel or the like. After the depression 5 is formed in this way, the groove 8 is formed, and the surface is polished by polishing or the like to obtain a product.

As described above, in the above-described embodiment, the first to ninth items are used.
By making the number 4 face approximately the same as the area of the pitching wedge, the relative position between the face 4 and the ball B at the time of a shot becomes substantially the same, and the same hit feeling can be obtained for each number.

Further, by setting the substantially same area as the area of the flat portion 4B of the face 4, the actual ball B
Is substantially the same as the effective area for the shot, and the relative position between the flat portion 4B of the face 4 and the ball B at the time of the shot is further the same, so that the same hit feeling can be obtained for each count.

Furthermore, by setting the ratio of the area of the face 4 of the first to ninth irons to within -10% with respect to the area of the face of the pitching wedge,
The same feel can be surely obtained. It is to be noted that the same hit feeling cannot be obtained outside this range.

In the embodiment, a plurality of depressions 5 are formed in the rear surface 1A of the head main body 1 by forging, so that the strength of the center side of the face 4 is improved. The thickness can be reduced to about 3.5 mm, and the weight of the thinned portion can be distributed to, for example, the sole 7 to increase the thickness B and increase the distance between the center of gravity G of the head 1 and the face 4 to enlarge the sweet area. In addition, the weight can be distributed to the annular protrusion 6 to increase the thickness C of the annular protrusion 6 and the weight distribution around the face 4 to increase the sweet area.

It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible.

[0021]

According to the first aspect of the present invention, there is provided an iron type golf club set comprising a first to ninth irons and a pitching wedge having a face connected to a shaft having a hosel provided on a side thereof and a pitcher wedge. The area of the face of the No. 9 to No. 9 irons is formed to be substantially the same as the area of the pitching wedge, and the hollow on the rear surface of the head is forged.
An iron-type golf club set characterized by being densely formed , and the relative positions of the face and the ball at the time of a shot can be made substantially the same regardless of the number,
The same hit feeling can be obtained , and the strength of the face is further improved.
Can be up.

According to a second aspect of the present invention, the ratio of the area of the face of the first to ninth irons is within -10% with respect to the area of the face of the pitching wedge. This is an iron-type golf club set, and the same feel can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a front view showing an embodiment of the present invention.

FIG. 3 is a sectional view showing an embodiment of the present invention.

FIG. 4 is a rear view showing an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a manufacturing step showing the example of the present invention.

FIG. 6 is a front view of a use state showing the embodiment of the present invention.

[Explanation of symbols]

 1 head 2 shaft 3 hosel 4 face 5 dent

Claims (2)

(57) [Claims] 1. An iron-type golf club set comprising a No. 1 to No. 9 iron and a pitching wedge having a face and a head provided with a hosel on a negative side, wherein the No. 1 to No. 9 iron faces are provided. An iron-type golf club set having an area substantially equal to the area of the pitching wedge and a plurality of dents formed densely on the rear surface of the head by forging . 2. The face of the first to ninth irons
Area ratio is based on the area of the face of the pitching wedge
Claims within -10%
Item 2. An iron-type golf club set according to item 1.