JP2780752B2 - Golf Iron 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 a golf iron club set.

[0002]

2. Description of the Related Art A golf iron club set is, for example, a set of a plurality of clubs from a long iron, a 1 iron to a short iron, a 9 iron or a pitching wedge and a sand wedge.
The specifications of these clubs differ for a given setting.
First, as the number increases, the shaft becomes shorter. Also, as the number increases, the loft angle, that is, the angle between the vertical plane and the face increases. Further, as the number increases, the lie angle, that is, the angle between the horizontal plane and the shaft increases. In addition, as a result of setting such a loft angle, the center of gravity of the head generally decreases as the number increases.

Further, as described in, for example, Japanese Patent Application Laid-Open No. 1-113082, there is also known an iron club in which a concave cavity is formed on the back side of a head. The cavity is intended to increase the sweet area by concentrating the weight distribution of the entire head to the peripheral portion with respect to the face. The sweet area is an area where the ball hit at the face can fly accurately and well. In the conventional golf iron club set, the position of the cavity in the left-right direction is constant regardless of the number.

[0004]

By the way, as shown in FIG. 6, a particularly poor player can easily hit a ball on the heel 2 side with respect to the midpoint M0 of the face 1 with a long iron, as shown by S1. For short irons, S2
As shown by, the ball tends to hit the toe 3 side more than the midpoint M0 of the face 1. When the ball hits the heel 2 side from the midpoint M0, the head 4 tends to rotate in the direction shown by the arrow C due to the relationship with the center of gravity G0. As a result, the hit ball is given slice rotation. On the other hand, when the ball hits the toe 3 side from the midpoint M0, the head 4
Tends to rotate in the direction indicated by arrow D, and as a result,
The hit ball is given a hook rotation. Thus, a long iron tends to slice and a short iron tends to hook.

As described above, since the cavity 5 enlarges the sweet area, it has the effect of reducing the tendency of slicing and hooking. However, the conventional iron club set in which the position of the cavity is constant regardless of the number has a problem that it is not appropriate for the tendency of slicing and hooking in long irons and short irons.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a golf iron club set suitable for long irons and short irons with a tendency to slice and hook.

[0007]

In order to achieve the above object, the present invention provides a head having a face on the front side and a concave cavity on the opposite back side, and a heel on one side in the left-right direction of the head. And a shaft connected via a hosel on the side, and a golf iron club set comprising a plurality of clubs in which the shaft becomes shorter as the number increases, the cavity is formed in two stages, and a recess is further formed in the center of the cavity. To form
The cavity is shifted from the heel side to the opposite toe side as the number increases, and the position of the concave portion is substantially constant regardless of the number.

[0008]

In the golf iron club set of the present invention,
The sweet area is enlarged by the cavity which is located on the back side of the head and has a concave portion at the center where the position is almost constant regardless of the number. Particularly poor players tend to hit the ball more easily on the heel side with long irons, and more easily hit the ball on the toe side with short irons, so that long irons tend to slice and short irons tend to hook. However, this tendency is mitigated by the cavity. Moreover, as the number increases, the position of the cavity shifts from the heel side to the toe side, so that the ball hits closer to the center of the cavity at each numbered club, making the cavity more effective Works.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a golf iron club set according to the present invention will be described with reference to FIGS. In FIGS. 1 and 2 and FIGS. 4 and 5 showing a second embodiment described later, # 3 is a 3-iron,
# 5 indicates a 5-iron, # 7 indicates a 7-iron, and # 9 indicates a 9-iron. In addition, in the code | symbol which shows each part of an iron club, after the number which shows the each part, the subscript of the lowercase letter corresponding to a number is suitably attached.

The iron club has heads 11a, 11b, 11
, 11d and shafts 12a, 12b, 12c, 12d fixed to the heads 11a,..., 11d. In the heads 11a,..., 11d, 13a, 13b, 13c, 13
d is a front face, 14a, 14b, 14c, and 14d are rear backs, 15a, 15b, 15c, and 15d are lower soles, 16a
, 16b, 16c, 16d are the upper tops, 17a, 17b, 17c
, 17d are heels on one side in the left-right direction, 18a, 18b, 18c, 1
8d is a toe on the other side in the left-right direction, and the heels 17a,
…, Hosel 19a, 19b, 19c, 19d neck on 17d side
It is formed via 20a, 20b, 20c, 20d. The hosels 19a,..., 19d are attached to the shafts 12a,
…, 12d are connected. The heads 11a,..., 11d
Is integrally formed by forging, casting, cutting, or the like, and is made of a metal such as titanium alloy, pure titanium, stainless steel, steel, or beryllium copper alloy. In this iron club set, as the number increases, the shafts 12a,..., 12d become shorter, the loft angle increases, and the lie angle increases.

The heads 11a,.
On the 14a,..., 14d side, concave cavities 21a, 21b, 21
c and 21d are formed. This cavity 21a, ...,
21d has two stages, and concave portions 22a, 22b, 22c, 22d are further formed in the center of the cavities 21a,..., 21d. Then, in the heads 11a,..., 11d of each club of the iron club set, the cavities 21a,.
21d, as the number increases, the faces 13a,.
The position in the left-right direction is gradually increased with respect to the heels 17a,..., 17d on the basis of d and on the basis of the backs 14a,.
From the side to the toe 18a, ..., 18d side. for that reason,
An annular peripheral wall 23a around the cavities 21a,.
23b, 23c, and 23d, as the number increases, the heel
The widths Aa, Ab, Ac, Ad on the a,..., 17d side gradually increase, and the widths Ba, Bb, Bc on the toe 18a,. Especially for the 9th iron, the cavity 21d
Penetrates to the toe 18d side. The recesses 22a,
.., 22d are almost constant regardless of the number.

Next, the operation of the above configuration will be described. The heads 11a,..., 11d of the back 14a,.
The head 11 is formed by the cavities 21a,.
a, ..., 11d The overall weight distribution is face 13a, ..., 13d
, The sweet area becomes large. In other words, the ball hit there is accurately and well fly over a wide range of the faces 13a,..., 13d.

By the way, a player who is particularly inferior with a long iron has a heel 17a higher than the midpoint of the face 13a.
The short iron tends to hit the toe 18d more easily than the midpoint of the face 13d. Thereby, about the hit ball,
Long irons tend to slice, while short irons tend to hook. On the other hand, the cavities 21a,.
Reduce the tendency of slicing and hooking as described above.

Further, as the number increases, the positions of the cavities 21a,..., 21d shift from the heels 17a,..., 17d to the toes 18a,. When the ball tends to hit the heel 17a more easily and the toe 18d more easily with the short iron, the ball hits closer to the center of the cavity 21a,. , And the cavities 21a,..., 21d act more effectively. Thus, it is possible to provide a golf iron club set suitable for the tendency of slicing and hooking in long irons and short irons.

FIGS. 4 and 5 show a second embodiment of the golf iron club set according to the present invention. This second
In the iron club set of the embodiment, the backs 14e, 14f, 14g of the heads 11e, 11f, 11g, 11h of each club.
, 14h side, face 13e, 1
With reference to 3f, 13g, 13h, the position in the left-right direction gradually increases from the heels 17e, 17f, 17g, 17h to toes 18e, 18f.
, 18g, 18h. In the same manner as in the first embodiment, in the heads 11e,..., 11h of the respective clubs, the larger the number of the cavities 21e, 21f, 21g, 21h, the more the number of the cavities 21e,. Even if the back 14e,..., 14h is used as a reference, the position in the left-right direction gradually increases from the heel 17e,.
e, ..., Shift toward 18h. Therefore, cavity 21
e, ..., 21h, surrounding wall 23e, 23f, 23g, 23h
As the number increases, the width Ae, Af, Ag, Ah on the side of the heel 17e, ..., 17h gradually increases, and the toe 18
The widths Be, Bf, Bg on the e, ..., 18h side gradually decrease.

As the number increases, the cavities 21e,
…, 21h is the heel 17e,…, from the 17h side, toe 18e,…,
Shifting to the 18h side means that as the number increases, the head
11e,…, 11h Toe weight 18e,
…, 18h side to the heel 17e,…, 17h side. On the other hand, as in the second embodiment, as the number increases, the back 14e,.
, ..., 17h side to the toe 18e, ..., 18h side, it is possible to correct the right and left weight distribution of the entire heads 11e, ..., 11h. That is, the difference in the number of the center of gravity of the entire head 11e,..., 11h in the left-right direction with respect to the faces 13e,.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made. For example,
As in the second embodiment, as the number increases, the back side is shifted from the heel side to the toe side with respect to the face, while the horizontal position of the cavity with respect to the back side may be substantially constant. . In this case, from the positional relationship between the face and the back, the position of the cavity in the left-right direction with respect to the face shifts from the heel side to the toe side as the number increases.

Although the head of the above embodiment is entirely made of the same material, the present invention is also applied to an iron club in which a weight made of a material having a higher specific gravity is fixed to the head body. it can.

[0019]

According to the present invention, the cavity on the back side is made into two steps, and a concave portion is further formed at the center of the cavity. The cavity is shifted from the heel side to the toe side as the number increases, Since the position of the concave portion is almost constant regardless of the number, the sweet area can be widened by distributing the weight of the entire head to the peripheral portion with respect to the face, and the slice and hook of the long iron and the short iron can be provided. A golf iron club set suitable for correcting the tendency can be provided.

[Brief description of the drawings]

FIG. 1 is a first view of a golf iron club set according to the present invention;
FIG. 2 is a horizontal sectional view of a head showing an embodiment.

FIG. 2 is a rear view of the same.

FIG. 3 is a cross-sectional view of the same.

FIG. 4 is a second view of the golf iron club set of the present invention.
FIG. 2 is a horizontal sectional view of a head showing an embodiment.

FIG. 5 is a rear view of the same.

FIG. 6 is a plan view of a head showing an example of a conventional golf iron club.

[Explanation of symbols]

11a, 11b, 11c, 11d, 11e, 11f, 11g, 11h Heads 12a, 12b, 12c, 12d, 12e, 12f, 12g, 12h Shafts 13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 14a 14b, 14c, 14d, 14e, 14f, 14g, 14h Back 17a, 17b, 17c, 17d, 17e, 17f, 17g, 17h Heel 18a, 18b, 18c, 18d, 18e, 18f, 18g, 18h Toe 19a, 19b 19c, 19d, 19e, 19f, 19g, 19h hosel 21a, 21b, 21c, 21d, 21e, 21f, 21g, 21h cavity 22a, 22b, 22c, 22d, 22e, 22f, 22g, 22h recess

Claims (1)

(57) [Claims] 1. A head having a face on the front side and a concave cavity on the opposite back side, and a shaft connected via a hosel to a heel on one side in the left-right direction of the head. In a golf iron club set including a plurality of clubs having a shorter shaft as the golf club becomes larger, the cavity is formed in two stages, and a recess is further formed at the center of the cavity.
An iron club set for golf, wherein the cavity is shifted from the heel side to the opposite toe side as the number increases, and the position of the recess is substantially constant regardless of the number.