JPH082380B2 - 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 an iron club set of no more than 9 from a club having a number 3 iron to a club having a sand wedge.

[0002]

2. Description of the Related Art A conventional iron club set is 10 to 11 for professional golfers and low handy players.
The average number of books was 7 to 9 for general golfers. In the set of iron clubs, it is required that the flight distance be reduced in an orderly manner from a small count to a large count and that the directionality be good. Using a total of 9 iron club sets consisting of 7 irons 3 to 9 and 1 pitching wedge and 1 sand wedge, the flight distance of each club was measured. For professional golfers and advanced players with power, the jump of each club gradually decreases smoothly with the 3 iron as the lead, but general golfers can not hit the long iron and the middle iron well, and they are better than the 6 and 7 irons. In some cases, the flight distance decreased. Therefore, as disclosed in Japanese Utility Model Laid-Open No. 54-86275, a ball is thrown farther with a long iron and is stopped immediately after falling with a short iron, focusing on the sole width. . Here, the sole width of the iron head is gradually narrowed from a long iron to a short iron. Further, as described in US Pat. No. 2,447,967, it is known that all club heads are of wood type.

[0003]

[Problems to be Solved by the Invention]
No. 5 publication does not describe the depth of the center of gravity and the absolute value of the sole width is not described. From the description of the specification and the drawings, the conventional shortest distance club Sole width and the maximum flight distance of the club width, for example I3 sole width around 10mm, I10 sole width 20
mm around reverse, I3 around 20mm, I10 around 10mm
It is considered to be just before and after. Sole width is 2
At around 0 mm, the depth of the center of gravity is around 1.9 mm, and the gear action effect cannot be expected with such a club, and it cannot be said that it is easy for a general bull fur to hit.
In addition, the relationship between the club length and the depth of the center of gravity is not mentioned at all, and it is impossible for a general bluffer to expect an increase in the flight distance of a long iron. What is described in US Pat. No. 2,447,967 is
The sole width does not decrease at a constant width as the count increases, but the depth of the center of gravity is almost the same for all count clubs, which may cause the short iron to fly too much. In addition, it becomes difficult to hit down blow with a short iron.

Therefore, the present invention makes it possible for even a general golfer to easily hit the ball, and decreases it in an orderly manner as the flight distance increases, and in particular, the flight distance of a club corresponding to a long iron or a middle iron is increased. The purpose is to provide a club set.

[0005]

In order to achieve the above-mentioned object, the present invention has nine locomotives from a club corresponding to a 3-iron to a club corresponding to a sand wedge, and the loft angle and the lie angle are different between the clubs. In an iron club set in which the distance is increased in order from the one set to be longer, the club lengths corresponding to Nos. 3 to 5 (I3 to I5) are set within the following range, and I3 ... 101 to 105 cm I4 ... 99 to 103 cm I5 ... 97 to 101 cm I3 to I5 The center of gravity depth of the club is set as an average value as follows, I3 ... 12.9 mm I4 ... 9.8 mm I5 ... 6.9 mm of each club It is configured so that the sole width of the head does not change suddenly and decreases in order from the one with a longer flight distance, and the depth of the center of gravity of each club does not change abruptly Decrease The changes in the sole width and the depth of the center of gravity are small between the clubs having the short flight distances, and the changes in the sole width and the depth of the center of gravity are large between the clubs having the long flight distances. It is a thing.

[0006]

In this set, the conventional clubs corresponding to I3 to I5 have a long club length, a deep center of gravity, and a wide sole width, so that the head speed is increased, the gear action effect is also provided, and the flight distance is long. Increase. In particular, since the sole width is wide even if the club length becomes long, the club length is not felt so much and it becomes easy to hit. I3-I5
By increasing the flight distance of a considerable club, the flight distance of the entire set will decrease in an orderly manner as the count increases.

[0007]

The preferred embodiments of the present invention will be described in detail below. In FIG. 1, the setting range of the length of each club according to the present invention is before and after the line indicated by the symbol A, and I3 to I9 of the club No. on the horizontal axis correspond to the iron numbers 1 to 9 respectively. PW is a pitching wedge, and SW is a club corresponding to a sand wedge. In the present invention, the length of each club is set as follows. I3 ... 101-105 cm I4 ... 99-103 cm I5 ... 97-101 cm I6 ... 95-99 cm I7 ... 93-97 cm I8 ...・ 91-95cm I9 ・ ・ ・ ・ ・ 89〜93cm PW ・ ・ ・ 87〜91cm SW ・ ・ ・ ・ ・ 85〜89cm

Here, as is clear from FIG. 1, PW and SW have almost the same length as in the conventional example. In addition, each club (I3, I4, I5, I6, I7, I8, I9,
The increase or decrease in the length between PW (or SW) is preferably within the range of 15 to 30 mm. The length between each club from I3 to PW is set to PW which is almost the same as the conventional example.
If the length between W and W is reduced by 15 mm on average, the set consists of 12 pieces. Increasing the length from the short iron to the long iron increases the head speed and makes it possible to fully utilize the loft angle of the long iron.

Further, the lie angle is in accordance with the club length, for example, when the length is increased or decreased by 15 mm, the range is 0 ° to 1 °, and 3
If it is 0 mm, increase or decrease within the range of 1 ° to 2 °.

As shown in the graph of FIG. 2, the member in which the length between the clubs is adjusted in this way is used by a person with power when the conventional set is used (indicated by reference numeral B '). In comparison, when the set of the present invention is used (reference B
Indicates that the head speed is improved, and even a general golfer can significantly improve the head speed (indicated by C) as compared with the conventional set (indicated by C '). The increase in head speed is reflected in the flight distance, and there is no step difference in the head speed between the counts, and if a smooth connection can be made between each club, the flight distance of each club will also be smoothly connected. For golfers with less power, it is not possible to expect improvement in head speed simply by increasing or decreasing the club length between clubs. In particular, a golfer who is not capable of achieving a head speed sufficient to make use of the loft range of a long iron will not have a golf ball and will not have a flight distance. Therefore, it is conceivable to increase the loft angle in order to raise the ball, but increasing the loft angle leads to a decrease in flight distance. Therefore, the present inventor studied a means of raising the ball by spinning, while increasing or decreasing the loft angle at a constant angle between the clubs. That is, even in the iron, it is considered to increase the spin by utilizing the gear action effect like the wood.
Focusing on G being one of the important factors that determine the ball streak, it is effective to set the center of gravity depth ZG so that it smoothly decreases from the club corresponding to the driver to the club corresponding to the pitching wedge. It was determined that it was a target. Then, the sole width is substituted so that the head shapes are smoothly connected as a major factor for setting the center-of-gravity depth ZG. That is, when the sole width of the head is increased, the center of gravity becomes deeper, and spin can be increased by the iron without changing the loft range. The result is a curve indicated by reference character D in the graph of FIG. 3, the distribution of the mark ◯ in the graph indicates the conventional example, and the vertical axis indicates the depth of the center of gravity (ZG unit mm).
Curve D shows the average value. In this way, the center-of-gravity depth ZG smoothly connects from I3 to PW without abrupt changes. Although the numerical value of the depth of the center of gravity (ZG) is measured in FIG. 3, the increase / decrease in the sole width of the head almost corresponds to the increase / decrease in this numerical value as in FIG.

The head shape of the golf club set of the present invention is, as shown in the examples shown in FIGS. 7 to 14, a club for the longest flight distance (corresponding to the conventional 3 iron) and a sole width of 4
8 mm, ZG 12.9 mm, loft angle 23 °, and as the count increases ( from the shape shown in FIG.
The width of the sole was also reduced so that the head shapes could be smoothly connected (as the shape shown in 1 ) . In this set example, the sole width, ZG, and loft angle are as shown in the following table.

[0012]

[Table 1]

In the set example shown in this table, the sole width is 4.5 mm to 7 mm and the ZG is 1.5 mm to I3 to I7.
It decreases as the count increases within the range of 3.2 mm. For I7 to PW, the sole width is 0.5 mm to 1 m
m and ZG decrease as the count increases in the range of 0.3 mm to 0.7 mm.

The results of actual hits by two general golfers are the graphs shown in FIGS. 4 and 5, and the result of one person is the curve X.
And X '(with the conventional set) and the results for the other person are shown with the curves Y and Y' (with the conventional set). As a result of using the set of the present invention, as shown by the curves X and Y, the flight distance is improved in the club corresponding to the long iron and the middle iron, and the flight distance of the conventional set is maintained in the club corresponding to the short iron. The flight distance is smoothly connected with each count.

[0015]

As described above, according to the present invention, the number of irons from the club corresponding to the third iron to the club corresponding to the sand wedge is 9 or less, and the loft angle and the lie angle are set to have a long flight distance between the clubs. In an iron club set that sequentially increases at a certain angle from 3rd to 5th (I3 to
The length of the club corresponding to I5) is set within the following range, and the depth of center of gravity of the club corresponding to I3 ... 101-105 cm I4 ... 99-103 cm I5 ... 97-101 cm I3-I5 is calculated as follows. I3 ... 12.9mm I4 ... 9.7mm I5 ... 6.9mm The sole width of each club's head does not change suddenly and is configured to decrease in order from the one with the longer distance set, The depth of the center of gravity of each club does not change rapidly, and it is configured to decrease in order from the one with the long flight distance set, and the changes in the sole width and the depth of the center of gravity do not change between multiple clubs with the short flight distance set. The changes in the sole width and the depth of the center of gravity are large between the clubs having a small flight distance and a long flight distance. Therefore, even a golfer without power can improve the flight of clubs equivalent to long irons and middle irons by increasing the head speed due to the club length and the spin effect due to the depth of the center of gravity. Even when combined, the flight distance is smoothly connected. Clubs equivalent to conventional long irons and middle irons have a deeper center of gravity than conventional clubs,
The spin can be increased, and even a general golfer can easily raise the ball, and even a bull fur who could not hit the down blow can hit the ball so that it is easy to use. The sole width of the club, which is equivalent to a conventional middle iron club or longer (has a longer flight distance), is:
It becomes wider than the conventional iron club, it becomes easier to hit at the same loft angle, the ball goes up, and the flight distance increases. In a club equivalent to a conventional short iron, the depth of the center of gravity does not change significantly and the club can be driven into a down blow, so that backspin is applied and the ball can be stopped on the green.

[Brief description of drawings]

FIG. 1 is a graph showing the club length of each club.

FIG. 2 is a graph showing the head speed of each club.

FIG. 3 is a graph showing the depth of the center of gravity of each club.

FIG. 4 is a graph showing the actual hitting results of an example of the present invention and a conventional golf club set.

FIG. 5 is a graph showing the results of actual hitting with an embodiment of the present invention and a conventional golf club set.

FIG. 6 is a graph showing the relationship between the sole width and the center of gravity depth ZG.

FIG. 7 is a side view showing an example of a set of head shapes according to the present invention.

FIG. 8 is a side view showing an example of a set of head shapes according to the present invention.

FIG. 9 is a side view showing an example of a head shape set according to the present invention.

FIG. 10 is a side view showing an example of a set of head shapes according to the present invention.

FIG. 11 is a side view showing an example of a head shape set according to the present invention.

FIG. 12 is a side view showing an example of a head shape set according to the present invention.

FIG. 13 is a side view showing an example of a head shape set according to the present invention.

FIG. 14 is a side view showing an example of a head shape set according to the present invention.

Claims (1)

[Claims] 1. An iron which has 9 or less from a club corresponding to a 3rd iron to a club corresponding to a sand wedge, and whose loft angle and lie angle increase at a constant angle in order from one having a longer flight distance between the clubs. In the club set, the lengths of the clubs corresponding to Nos. 3 to 5 (I3 to I5) are set within the following ranges, and I3 ... 101 to 105 cm I4 ... 99 to 103 cm I5 ... 97 to 101 cm I3 to I5 Set the depth of center of gravity of the club as an average value as follows: I3 ... 12.9mm I4 ... 9.8mm I5 ... 6.9mm Set the long flight distance without sudden changes in the sole width of each club head. It is configured to decrease in order from the one that has been set, and the depth of the center of gravity of each club does not suddenly change, and it is configured to decrease in order from the one that sets the long flight distance, and Between clubs Is an iron club set characterized in that the changes in sole width and the depth of the center of gravity are small, and the changes in the sole width and the depth of the center of gravity are large between clubs set to have a long flight distance.