KR101248587B1 - Utility iron - Google Patents

Abstract

PURPOSE: A utility iron is provided to increase a reactive force due to a collision between a head and a golf ball and to reduce a swing trajectory, thereby increasing the driving distance of a user by allowing the user to accurately hit the ball. CONSTITUTION: A utility iron includes a head part(12) and a shaft(14). The head part is formed into an existing iron shape(excluding a wood head such as a dip face). The shaft is connected to the head part. A lie angle is 61 to 63 degrees, a loft angle is 20 to 26 degrees, the weight of the head is 270 to 290 grams, and the length of the shaft is 35 to 37.5 inches. Therefore, a reactive force due to a collision between the head part and a golf ball increases, and the driving distance of the ball increases because the weight of the head part is larger than the weight of an iron having a low number. [Reference numerals] (AA) Lie angle;

Description

Utility iron

The present invention relates to a utility iron, and more particularly, to a utility iron that can increase the flying distance more stably.

Recently, as the quality of life is improved by the development of the industry, golf is recognized as a popular sport, and golf is spreading widely for the purpose of exercise and leisure, especially among the elderly.

Such a golf is a game in which a golf ball is put into a hole of a certain size using a variety of golf clubs with a small number of strokes, and the club is hit by selecting a club according to the distance to the hole cup and the situation of the ground.

For example, in the tee ground, the driver hits the golf ball and blows it 200-300 meters to settle on the fairway, and selects a variety of irons and woods depending on the distance from the ball position to the hole cup. After the ball is blown, the golf ball is pushed into the hole cup using a putter on the green.

At this time, the golf ball is hit by selecting various irons and woods according to the distance between the golf ball and the hole cup falling on the fairway. In this case, an appropriate club should be selected according to the body shape and the hitting habit.

Figure 1 shows the distance of the golf ball when hitting the golf ball accurately using a variety of conventional irons and woods, as shown, in the case of iron 9, the golf ball floats high, while the short distance, As you go to the iron, you can see that the golf ball floats lower, resulting in a longer distance.

The reason is that the higher the iron, the larger the loft angle, so that the golf ball can be more easily floated.

In the case of golf clubs, there are slight differences among manufacturers, but the higher the iron, the higher the loft angle and the lie angle, the larger the head weight, and the shorter the shaft length.

Therefore, most amateurs can more easily float the golf ball seated on the fairway, reducing the error of topping, the weight of the head is relatively heavy, increasing the repulsion force due to the impact, and the swing angle is reduced, so the probability of hook or slice I often use high order irons to reduce the

That is, the higher the iron, the larger the loft angle, so that the golf ball can be more easily floated, the larger the weight of the head can increase the repulsion force due to the impact, and the shorter the shaft length, the smaller the swing trajectory, so that the golf ball is the center of the head. I use a high order iron which it is easy to match with.

However, as described above, in the case of high order irons, it is easier to hit the exact RBI due to the large weight of the head and the short shaft length, as shown in FIG. 1. Due to the large loft angle, the trajectory of the golf ball is increased, which makes it difficult to increase the distance.

In addition, in the case of a high turn iron, there is a big problem in that a hook occurs along a flat or a slice occurs due to an upright, because the loft angle is relatively larger than that of a low turn iron.

Therefore, in order to solve such a problem, it is necessary to select a lower turn iron to hit the golf ball. In the case of a low turn iron, the loft angle and the lie angle are relatively small. However, since the weight of the head and the length of the shaft are long, most amateurs have a lot of difficulties in accurate hitting, and thus end up causing a lot of mistakes such as topping, hooking, and slicing.

The present invention has been devised in view of the above problems, the loft angle is small and the lie angle is relatively large, the weight of the head and the length of the shaft is relatively short, thereby increasing the repulsive force due to the collision of the head and the golf ball. In addition, the purpose is to provide a utility iron that can reduce the swing trajectory to increase the accurate hitting and the resulting distance.

Utility iron according to the present invention for achieving the above object, the lie angle is 58 to 64 degrees, the loft angle is 20 to 28 degrees, the weight of the head is 270 to 300g, the length of the shaft is 35 to 38 inches It is done.

As described above, according to the utility iron according to the present invention, the loft angle is relatively reduced, so that the golf ball does not float high, thereby providing an effect of increasing the flying distance.

In addition, the lie angle is relatively large to provide an effect of reducing the risk of the occurrence of hooks or slices.

In particular, the weight of the head is increased, the repulsive force due to the impact with the golf ball is increased, so that the distance of the golf ball can be relatively increased, and the length of the shaft is shortened to reduce the swing trajectory. It also provides the effect of increasing the distance.

1 is a view showing the distance of the golf ball when hitting the golf ball accurately using a variety of conventional irons and wood.
Figure 2 is a front view of the head of the utility iron according to the present invention.
3 is a side view of the head of the utility iron according to the present invention.
4 and 5 is a view showing the measurement results of the flight distance using the utility iron according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a front view of the head of the utility iron according to the present invention, Figure 3 is a side view of the head of the utility iron according to the present invention.

Utility iron 10 according to the present invention is composed of a head portion 12 to hit the golf ball, and a shaft 14 to be held by the golfer by hand.

Here, it is preferable that the weight of a head part is 270-300g, the loft angle is 20-28 degree, the lie angle is 58-64 degree, and the length of a shaft is 35-38 inches.

Therefore, since the weight of the head is relatively large as compared to the low order irons, the repulsion force due to the collision with the golf ball is increased, so that the distance of the golf ball is increased.

In addition, since the loft angle is relatively small compared to the iron of the high turn, the golf ball does not float much up, and the distance of the golf ball increases.

In addition, since the lie angle is relatively large compared to the low order irons, the shaft may be swinged while being held close to the vertical without laying the shaft, thereby reducing the possibility of the hook or slice being generated.

In addition, since the length of the shaft is relatively short compared to the low order irons, the swing trajectory is reduced, so that the swing during the swing is reduced, so that it is easy to accurately match the golf ball to the center of the head.

Example 1

A utility iron with a head weight of 284g, a loft angle of 22 degrees, a lie angle of 62.5 degrees and a shaft length of 36 inches was manufactured. As shown in FIG. 3, the shape of the head is a typical iron shape, and the shape is distinguished from a conventional wood or utility having a Dip Face in order to achieve high elasticity.

Comparative Example 1

Four year average data of US PGA and LPGA players were applied, and the utility irons according to the present invention were compared according to the swing speed of the nine irons of the data. [Table 1] and [Table 2].

Average Four Year Club Value of US PGA Players

Average 4 Year Club Value of US LPGA Players

Experimental Example 1

As described above, with the utility iron of the first embodiment according to the present invention was carried out an experiment to perform each hit with four golf balls in the National Sports Promotion Corporation, each of the average, the average value of Table 3 to Table 5, Figure 4 and As shown in FIG.

Table 4 above is an experimental value obtained by hitting the golf ball 10 times as the average value of the swing speed using the 9 irons.

Table 5 above is an experimental value obtained by hitting the golf ball 10 times as the average value of the swing speed using the 9 irons.

At this time, the swing machine was performed under the same conditions (same room temperature, the same swing speed and the same force) when hitting the golf ball using a utility iron.

In other words, PGA players hit four golf balls 10 times at the average value of swing speed using 9 irons, and LPGA players hit 4 golf balls 10 times at the average value of swing speed using 9 irons. Each experiment was conducted by hitting.

As such, the utility iron according to the present invention, as a result of the hitting test under the same conditions (swing speed) as the nine irons used mainly by golfers, as shown in Table 6 and Table 7, the distance (golf ball falls to the ground) Distance to the site) was 41 yards more than the average distance of PGA and 46 yards of the average distance of LPGA.

Club speed
(mph) Ball speed
(mph) Ballistic
(deg) Spin amount
(rpm) Flying distance
(yds) Distance
(yds) PGA 9I 85 109 20.4 8647 148 41 Invention utility iron 86.1 125.9 15.4 4148 189

Club speed
(mph) Ball speed
(mph) Ballistic
(deg) Spin amount
(rpm) Flying distance
(yds) Distance
(yds) LPGA 9I 72 93 23.8 7589 119 46 Invention Utility Iron 75.8 113.1 15.0 3113 165

The technical idea described in the embodiments of the present invention as described above may be implemented independently, or may be implemented in combination with each other. In addition, the present invention has been described through the embodiments described in the drawings and the detailed description of the invention, which is merely exemplary, and those skilled in the art to which the present invention pertains have various modifications and equivalent other embodiments. It is possible. Accordingly, the technical scope of the present invention should be determined by the appended claims.

10: utility iron 12: head
14: shaft

Claims (1)

The head has a typical iron shape (excluding dip face shapes such as wood), lie angle 61-63 degrees, loft angle 20-26 degrees, head weight 270-290 g, shaft length 35-37.5 Utility iron characterized by being an inch.

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