JPH07323100A - Iron club set of golf - Google Patents

Abstract

PURPOSE:To correct a tendency of generating a hook with a short iron and a slice with a long iron generally in the past. CONSTITUTION:As the size increases, the sides of backs 14c, 14e and 14g are separated from the sides of hosels 19c, 19e and 19g with respect to faces 13c, 13e and 13g. Hence, as the size increases, the centers Gc, Ge and Gg of gravity and of heads 1c, 11e and 11g are separated from the sides of the hosels 19c, 19e and 19g horizontally with respect to the faces 13c, 13e and 13g. In a fifth iron, the midpoint M in a horizontal way of the face 13e almost coincides with the position in the horizontal way of the center Ge of gravity. Thus, the setting of the position of the center of gravity allows the generation of a slicing rotation in a ball hit with a short iron and a hooking rotation therein with a long iron. This cancels the persistent tendency of the slice and the hook as mentioned above.

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 1 iron to a short iron 9 iron or a pitching wedge and a sand wedge.
The specifications of these clubs are different in a given setting.
First, the larger the number, the shorter the shaft. Further, as the number increases, the loft angle, that is, the angle formed by the vertical surface and the face increases. Further, the larger the number, the larger the lie angle, that is, the angle formed by the horizontal plane and the shaft. As a result of setting the loft angle and the like, generally, the larger the number, the lower the center of gravity of the head.

However, in the conventional iron club set, the positional relationship between the face, the hosel, and the center of gravity of the head in the left-right direction is substantially constant regardless of the number.
Incidentally, FIG. 7 shows an example of a conventional iron club. In the figure, 1 is a head, and this head 1
Has a face 2 on the front surface. Further, 3 is a back on the rear side, 4 is a heel on one side in the left-right direction, 5 is a toe on the other side in the left-right direction, and a hosel 7 connecting a shaft 6 to the heel 4 side is provided via a neck 8. . Furthermore, M0
Is the midpoint of the face 2 in the left-right direction, and G0 is the center of gravity of the head 1. The midpoint M0 of the face 2 is set as a hitting point. The middle point M0 of the face 2 in the left-right direction and the head 1
The position of the center of gravity G0 in the left-right direction is almost the same, and this does not change regardless of the number. However, in such a conventional iron club set, a short iron is caught by many players.
Is likely to occur, and a long iron tends to cause slicing.

Moreover, particularly poor players can easily hit the ball on the heel 4 side with respect to the midpoint M0 of the face 2 with the long iron as shown by S1, and with the short iron as shown by S2 with the face 2 as shown by S2. The ball tends to hit the toe 5 side more easily than the midpoint M0. When the ball hits the heel 4 side from the midpoint M0, the head 1 tends to rotate in the direction indicated by the arrow C due to the relationship with the center of gravity G0, and as a result, the hit ball is given slice rotation. On the other hand, when the ball hits the toe 5 side of the midpoint M0,
On the contrary, the head 1 tends to rotate in the direction indicated by the arrow D, so that the hit ball is given a hook rotation. In this way, the tendency of slicing with long irons and hooking with short irons is further enhanced.

Further, in Japanese Patent Laid-Open No. 1-113082, the displacement, that is, the center of the shaft, increases as the number increases, with the aim of making the moments of inertia around the shaft substantially the same regardless of the number. It is described that the distance in the left-right direction between the intersection of the shaft and the ground horizontal plane of the head and the center of gravity of the head is reduced. However, then, the tendency of the hook in the short iron and the slice in the long iron is rather increased.

[0006]

As described above, in the conventional iron club set, the positional relationship between the face and the center of gravity of the head in the left-right direction is substantially constant regardless of the number. There was a problem that hooks tended to occur and slices tended to occur with long irons. Further, as described in JP-A-1-113082, the larger the number, the smaller the displacement, the hook in the short iron,
The tendency of slicing in long irons is rather increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object of the present invention is to provide a golf iron club set capable of correcting the tendency of hooks in short irons and slices in long irons. . A second object is to facilitate setting of the correction in the manufacture of the head. A third object is to widen the sweet area of the head.

[0008]

In order to achieve the first object of the present invention, a head having a face on each front surface and a hosel on the heel side on one side in the left-right direction of the head are interposed. In a golf iron club set consisting of a plurality of clubs that have a shaft connected to each other and the shaft becomes shorter as the number increases, the center of gravity of the head is from the hosel side in the left-right direction as the number increases with respect to the face. It's separated.

According to a second aspect of the invention, in the golf iron club set according to the first aspect of the invention, a fifth iron is used.
The midpoint of the face in the left-right direction and the position of the center of gravity of the head in the left-right direction are substantially matched.

According to a third aspect of the present invention, in the golf iron club set according to the first or second aspect, the second
In order to achieve the above object, the rear side of the head is generally separated from the hosel side in the left-right direction as the number of the face increases.

According to a fourth aspect of the invention, in the golf iron club set according to any one of the first to third aspects of the invention, in order to achieve the third object, a concave cavity is provided on the back side of the head. Is formed.

[0012]

In the golf iron club set according to the present invention, the target of the hitting point of the ball on the face is generally set at a fixed position in the left-right direction, while the center of gravity of the head is set on the face. On the other hand, as the number increases, the distance from the hosel side in the left-right direction increases. Therefore, as the number increases, the center of gravity is positioned further away from the hosel side with respect to the hit point in the left-right direction. Therefore, when hitting the ball, the greater the number, the stronger the tendency of the head to rotate in the forward direction of the toe side, and the stronger the tendency of slice rotation to the ball, and vice versa. The smaller the number, the stronger the tendency of the head to rotate in the toe-back direction, and the stronger the tendency of the ball to rotate on the hook. This corrects the tendency of the hook in the short iron and the slice in the long iron. In addition, a poor player hits the ball to the heel side with a long iron,
A short iron tends to hit the ball toward the toe side, but this causes the ball to hit closer to the center of gravity, resulting in a more accurate ball foot.

According to the golf iron club set of the invention of claim 2, the center point of the face in the left-right direction and the position of the center of gravity of the head in the left-right direction substantially coincide with each other at the fifth iron. Since the midpoint of the face is the target for hitting, with a short iron of 6 or above, the head tends to rotate in the forward direction of the toe as described above when hitting the ball, and the number of hits is 4 or below. With a long iron, the head will tend to rotate in the direction that the toe side is rearward.

In the golf iron club set according to the third aspect of the present invention, the center of gravity of the head is on the hosel side because the rear side of the head is separated from the hosel side in the left-right direction as the number of the face increases. Get away from. That is, the position of the center of gravity is set only by setting the shape of the head without using a separate weight.

In the golf iron club set according to the fourth aspect of the present invention, the weight distribution of the entire head is concentrated in the peripheral portion with respect to the face due to the cavity on the back side of the head, and the sweet area is widened. Therefore, the deterioration of the ball foot due to the deviation of the hit point from the center of gravity is reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a golf iron club set of the present invention will be described below with reference to FIGS. In addition, in the code | symbol which shows each part of an iron club, after the number which shows each part, the subscript of a lower case letter corresponding to a number is attached suitably.

As shown in FIG. 3, the iron club comprises a head 11 and a shaft 12 fixed to the head 11. In the head 11, 13 is a front face, 14 is a rear back, 15 is a lower sole, 16 is an upper top, 17 is one heel in the lateral direction, and 18 is a toe in the other lateral direction. , Hosel 19 on the heel 17 side is neck 20
Is formed through. The shaft 12 is connected to the hosel 19. The head 11 is integrally formed as a whole by forging, casting, cutting or the like, and the material thereof is a metal such as titanium alloy, pure titanium, stainless steel, steel or beryllium copper alloy. In this iron club set, the larger the number, the shorter the shaft 12, the larger the loft angle, and the larger the lie angle.

Also, as shown in FIGS. 1 and 2, the heads 11a, 11c, 11 of the clubs of the present iron club set are shown.
In e, 11g, and 11i, face 13,
The positional relationship between 13c, 13e, 13g and hosel 19c, 19e, 19g in the left-right direction is almost constant, and faces 13, 13c,
The lateral dimension A of 13e and 13g is also almost constant. Incidentally, M is the midpoint of the faces 13, 13c, 13e, 13g in the left-right direction. In contrast, the heads 11a, 11 of each club
On the back 14, 14c, 14e, and 14g sides of c, 11e, 11g, and 11i, the larger the number, the more the face in the left-right direction.
Hosel 19c, 19 as a whole for 13, 13c, 13e, 13g
e, going away from the 19g side. As a result, the head 11a,
The centers of gravity Ga, Gc, Ge, Gg, Gi of 11c, 11e, 11g, and 11i are
As the number increases, the face 13,
13c, 13e and 13g are separated from hosel 19c, 19e and 19g and neck 20c, 20e and 20g. Especially Figure 2
1 shows the outline of the planar shapes of the heads 11a, 11c, 11e, 11g, and 11i of the 1, 3, 5, 7, and 9 irons. As shown in FIG. 2 and FIG. 1 (b),
With the fifth iron, which is a middle iron, the left and right midpoint M of the face 13e and the left and right position of the center of gravity Ge of the head 11e substantially coincide. In addition, back 14, 14c, 14e, 14
The lateral dimensions Bc, Be, and Bg of g may be substantially constant depending on the number, but may be appropriately changed.

Next, the operation of the above configuration will be described. In general, face 13 in the left-right direction,
The midpoint M of 13c, 13e and 13g is the target for hitting the ball. Therefore, in the following description, faces 13, 13c,
It is assumed that the midpoint M of 13e and 13g is the hit point. In this iron club set, the larger the number, the more head 1
Center of gravity of 1, 11a, 11c, 11e, 11g, 11i Ga, Gc, Ge, G
Since g and Gi are separated from the hosel 19, 19c, 19e and 19g side in the left and right direction with respect to the faces 13, 13c, 13e and 13g, the center of gravity Ga, Gc, Ge, Gg and Gi are relative to the hit point M. Also goes away from the hosel 19, 19c, 19e, 19g side in the left-right direction. In the fifth iron shown in FIG. 1B, the hitting point M and the position of the center of gravity Ge in the left-right direction substantially match. Therefore, in the case of a short iron with a size of 6 or more, FIG.
As shown in, when the ball is hit, the center of gravity Gg with respect to the hit point M
Since the position of the head is shifted to the side opposite to the hosel 19g, the head 11g tends to rotate in the forward direction C of the toe 18g side, and as a result, the hit ball is given a slice rotation. As the number increases, the tendency of the heads 11g and 11i to rotate in the C direction becomes stronger, and the tendency of the slice rotation of the ball becomes stronger. On the other hand, in the case of a long iron number 4 or less, as shown in FIG. 1 (a), when the ball is hit, the position of the center of gravity Gc with respect to the hitting point M is deviated to the hosel 19c side. 18c side tends to rotate in the direction D toward the rear,
As a result, the hit ball is given a hook rotation. As the number becomes smaller, the heads 11a, 11c
Becomes stronger in the direction of D, and the tendency of the ball to rotate in the hook becomes stronger.

Generally, the conventional short irons are apt to cause a hook (hook), but in the short iron of the present embodiment, the slice rotation is applied to the ball as described above, so that the original hooks are not hooked. The tendency of is corrected, it becomes difficult to hook, and the ball will fly straight as you intended. On the other hand, the conventional long iron was originally prone to slicing, but in the long iron of the present embodiment, the tendency of the original slice is corrected by giving the hook rotation to the ball as described above, Harder to do,
After all, the ball will fly straight as you intended. In order to make such correction appropriate, as described above, with the 5th iron, the left and right midpoint M of the face 13e and the left and right position of the center of gravity Ge of the head 11e are made to substantially coincide with each other, and the length is long. In iron, the center of gravity Ga and Gc are face 1
It is better to shift to the heels 17 and 17c side than the midpoint M of 3 and 13c, and for the short iron, shift the center of gravity Gg and Gi to the toe 18 and 18g side from the midpoint M of the face 13 and 13g. In this way, hooks and slicing can be prevented with each number of iron clubs, and good ball directionality can be obtained.

In addition, a player who is particularly poor at a long iron has a heel 1 more than a midpoint M of the faces 13 and 13c.
It is easy to hit the ball on the 7 and 17c side, and with a short iron, it tends to hit the toe 18 and 18g side more than the midpoint M of the face 13 and 13g.
Due to the positional relationship between the center point M of c, ..., 13g and the centers of gravity Ga, ..., Gi, the ball hits closer to the centers of gravity Ga ,. Therefore, even a poor player can obtain a more accurate ball foot.

By the way, as described above, it is possible to change the position of the center of gravity for each number by fixing a weight made of a material having a larger specific gravity to the head body and changing the fixing position. . However, in the above embodiment, the faces 13, 13c, 13e, 13g are kept constant, while the backs 14, 14c, 14e, 14g are shifted in the left-right direction as a whole, that is, the heads 11, 11a, 11g.
Since the center of gravity position for each number is set only by setting the shape of c, 11e, 11g, 11i itself, a separate weight is not required, and therefore the heads 11, 11a, 11c,
Manufacture of 11e, 11g, and 11i can also be made easier.

FIGS. 4 to 6 show a second embodiment of the golf iron club set of the present invention. In these figures, (a) shows a 2 iron, and (b) shows a 9 iron. Further, the reference numerals indicating the respective parts have the same numbers as in the first embodiment, and the second iron has k,
The 9-iron is suffixed with r. Also in the second embodiment,
Heads 11k and 11r of each club of the iron club set, face 13k and 13r and hosel regardless of number
While the positional relationship between 19k and 19r in the left-right direction is almost constant, on the back 14k, 14r side, as the number increases, the hosel 19k, 19r is totally different from the faces 13k, 13r in the left-right direction. Get away from the side. As a result, the centers of gravity Gk, Gr of the heads 11k, 11r move away from the hosel 19k, 19r and the necks 20k, 20r with respect to the faces 13k, 13r in the left-right direction as the number increases. In the second embodiment, concave cavities 21k and 21r are formed on the back 14k and 14r sides of the heads 11k and 11r.

With these cavities 21k and 21r, the head
The weight distribution of the 11k and 11r as a whole is concentrated in the peripheral part with respect to the faces 13k and 13r, and the sweet area becomes wider. The sweet area is the area where the ball hit at the faces 13k and 13r flies accurately and well. Therefore, the deterioration of the ball foot due to the deviation from the center of gravity Gk, Gr of the hit point is reduced. As a result, it is possible to provide an iron club that can be used by both good players and bad players who tend to have different hit points. In other words, both the good player and the poor player have the RBI within the sweet area,
As described above, the midpoint M of the faces 13k and 13r and the centers of gravity Gk and Gr
The action and effect due to the positional relationship for each number of and are more effectively exhibited.

The present invention is not limited to the above embodiment, and various modifications can be made. First, the shape of the head is not limited to that shown in the drawing. For example,
In the above-described embodiment, the head 11 gradually widens from the heel 17 side to the toe 18 side, but it may have a substantially uniform width. Further, in the above-described embodiment, the position of the center of gravity in the left-right direction according to the number is set by shifting the back 14 side of the head 11 in the left-right direction as a whole. It is also possible to set the position of the center of gravity in the left-right direction according to the number by changing the left-right direction. Of course, these two are not clearly distinguished. Further, the present invention can be applied to an iron club in which a weight made of a material having a larger specific gravity is fixed to the head body.

[0026]

According to the invention of claim 1, in the golf iron club set, the center of gravity of the head is separated from the hosel side in the left-right direction as the number is larger with respect to the face. The slicing tendency of long irons can be corrected, and the directionality of the hit ball can be improved regardless of the number.

According to the invention of claim 2, in the fifth iron, the midpoint of the face in the left-right direction and the position of the center of gravity of the head in the left-right direction are made to substantially coincide with each other, so that the above correction is more appropriate. it can.

According to the third aspect of the invention, as the number of the face increases, the rear side of the head is separated from the hosel side in the left-right direction as a whole, so that a separate weight is not used. The position of the center of gravity can be set only by setting the shape of the head, and the head can be easily manufactured.

According to the fourth aspect of the invention, since the cavity is formed on the back side of the head, the sweet area is widened. Therefore, the deterioration of the ball foot due to the deviation of the hitting point from the center of gravity can be reduced, and the hitting points tend to be different. We can provide an iron club that can be used by both good and bad players.

[Brief description of drawings]

FIG. 1 is a first of the golf iron club set of the present invention.
It is a top view of the head which shows an example.

FIG. 2 is an explanatory plan view showing a change in head shape according to the above-mentioned number.

FIG. 3 is a front view of the above iron club.

FIG. 4 is a second part of the golf iron club set of the present invention.
It is a top view of the head which shows an example.

FIG. 5 is a rear view of the head.

FIG. 6 is a sectional view of the same head.

FIG. 7 is a plan view showing an example of a conventional golf iron club.

[Explanation of symbols]

11, 11a, 11c, 11e, 11g, 11i, 11k, 11r head 12, 12c, 12e, 12g, 12k, 12r shaft 13, 13c, 13e, 13g, 13k, 13r face 17, 17c, 17e, 17g, 17k, 17r Heel 19, 19c, 19e, 19g, 19k, 19r Hosel Ga, Gc, Ge, Gg, Gi, Gk, Gr Center of gravity M Center left and right midpoint

Claims (4)

[Claims] 1. A plurality of clubs each having a head having a face on the front surface and a shaft connected to a heel side on one side in the left-right direction of the head via a hosel, the shaft becoming shorter as the number increases. In the golf iron club set, the center of gravity of the head is further away from the hosel side in the left-right direction as the number of the face is larger. 2. The iron club set for golf according to claim 1, wherein the center point of the face in the left-right direction and the position of the center of gravity of the head in the left-right direction are substantially aligned with each other. 3. The golf iron club set according to claim 1, wherein the rear side of the head is separated from the hosel side in the left-right direction as the number increases with respect to the face. 4. The head according to claim 1, wherein a concave cavity is formed on the back side of the head.
A golf iron club set according to the item.