JP2002017902A - Golf club set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club set of a new set constitution to which utility clubs are added. SOLUTION: The golf club set is constituted of group-A clubs with a sole width of >=35 mm, a club length of >=39 in., and the specific gravity of a head material of <7.0 as clubs with a loft angle of <30 deg. for long and intermediate distances and group-B clubs with a sole width of <35 mm as clubs with a loft angle of >=30 deg. for intermediate or short distances.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club set including an iron club and a utility club.

[0002]

2. Description of the Related Art In a conventional golf club set, several wedge clubs and putters are provided in a full set composed of a wood club such as a driver or fairway wood and an iron club from 2 or 3 irons to 9 irons. It was common knowledge in the industry that these were combined to form a set with all the clubs needed for play. However, in order to solve the difficulty of hitting with a long iron club which is usually 2 to 4 irons, a long iron club which is said to correspond to a wood club whose flight distance has been significantly extended has been described. In response to the demand for increasing the distance, recently, a so-called utility club having characteristics intermediate between a wood club and an iron club has been frequently used. ing.

[0003]

The above-mentioned utility club is a club in which the flight distance of the ball is emphasized for long and medium-distance use, and is generally a club from a fairway wood to a 5-iron. It is used in addition to traditional sets as a replacement for any club. That is, the conventional iron set including the conventional No. 3 to No. 9, pitching wedges, and the like is no longer desired as a set. As a result, club numbers change with regard to lie angle, loft angle, club length, swing weight, club head shape, etc., which have long been used as references when assembling sets with the most emphasis on flight distance. The flow of the corresponding orderly design values cannot be obtained, and the set configuration is trial and error.

[0004] Further, as described above, since an optimum club combination method including a utility club has not been generalized yet, a set match is left to an individual, and a high level of skill with abundant experience and knowledge is provided. Only a few golfers can benefit from the utility club and improve the set function, but most average golfers gather without knowing the optimal combination of iron club and utility club Are mixed in the golf bag, and the function of the club set is not sufficiently exhibited. In view of such a situation, an object of the present invention is to provide a golf club set having a new set configuration including a utility club.

[0005]

According to a first aspect of the present invention, there is provided a golf club set comprising two types of club groups, A and B, according to the present invention. In the clubs of the group A, which are constituted by clubs having a loft angle set to a value of less than 30 degrees, the sole width is set to 35 mm or more and the loft angle is set to a value of 30 degrees or more. The configured group B clubs have a sole width of less than 35 mm.

[0006] When combining a utility club as a representative example belonging to the clubs of the group A and an iron club as a representative example belonging to the clubs of the group B as a set, first, a flight distance area to be handled by the clubs of each group. It is important to set clearly. For this reason, the inventor conducted a flight distance test using a conventional iron club set by about 20 golfers. Fig. 6 shows the specifications of the iron club set used in the test.
In the table.

[0007] Usually, the iron club set is designed so that the difference in flight distance between adjacent counts is substantially equal in the set. According to the test results, however, the fact is that the average skill level is the average skill level. Golfers tend to gradually reduce the difference in flight distance between adjacent counts on the long iron side of small counts, while those who are good at iron clubs and advanced players with high technical levels can use clubs with small counts. The distance difference between the counts is almost constant in the entire area of the set. FIG. 7 shows, as an example of this test, the flight distance for each iron count when a person who is not good at ironing clubs hits. In this case, the flight distance difference is constant up to 6 irons. But the loft angle is 30
In clubs smaller than the fifth iron, which is less than the degree, the flight distance is reduced. Based on the test results, in the golf club set according to the present invention, clubs requiring a relatively large flight distance of a long and medium distance of less than 30 degrees of loft angle are classified as group A, Therefore, the flight distance is devised so that the difference can be sufficiently large.

[0008] A long and medium distance club having a loft angle of less than 30 degrees is one of the main causes of a decrease in flight distance and an insufficient difference in flight distance between adjacent counts. There is a point that cannot be raised high. In order to improve this point, in the present invention, the sole width of the head is increased to 35 mm or more. By increasing the sole width to this range, it is easier to hit the golfer's swing trajectory in accordance with the powerless golfer's swing trajectory, and it is possible to maintain a large launch angle and raise the ball high even without power, increasing the flight distance Is obtained. As a result, the difference in flight distance between adjacent counts can be made sufficiently large with an appropriate value (about 10 m). When the sole width is 50 mm or more, a large resistance is easily received from the ground when the sole comes into contact with the ground, and there is a problem that the ability to escape from rough terrain such as a rough surface is reduced.

On the other hand, for the clubs of group B in the set whose loft angle is set to a value of 30 degrees or more, the sole width is 35
It is set to a small value less than mm. In this group of clubs, the direction of the hit ball and the accurate flight distance are more important than the size of the flight distance, so the club swing is a hit that increases the spin of the hit ball in a small trajectory like hitting the lower end of the face on the ground Therefore, the narrower the width of the sole, the better the width of the sole. If the width of the sole is large, the sole surface is more susceptible to repulsive force from the ground, and the accuracy of the impact is undesirably reduced.

Further, in the golf club set according to the present invention, as described in claim 2, the club length of the group A club is set to 39 inches or more, and the conventional long iron (conventionally, It is possible to increase the flight distance compared to 38.5 inches with a 3 iron). In addition, from the content of the club set targeted by the present invention, in order to improve the directionality of the hit ball than the driver,
It is desirable to keep the club length below 44 inches, close to the driver's length.

Further, in the clubs of the group A, the head weight becomes heavy because the sole width is widened as described above, and the club length is lengthened, so that the swing balance becomes too large and it is difficult to swing. For this reason, it is necessary to select a light material for the head. Therefore, in the present invention, the specific gravity is selected to be less than 7.0 so that the material of the head of the group A club is made of a lighter material than the iron material which has been generally used in conventional long iron clubs. Furthermore, it is preferable to use a material having a specific gravity in the range of 2.5 to 5.0 in order to enhance the overall performance of the set. On the other hand, since the group B can have almost the same specifications as a conventional iron club, it is preferable to use stainless steel or soft iron (specific gravity of about 7.8), which has been used in the past, as its material.

In the present invention, the sole width is a horizontal distance from the leading edge at the lower end of the face to the tip of the back side of the head. The club length is defined as the "length measured from the upper end of the shaft grip to the outer surface of the sole of the club along the axis of the shaft (or an extension thereof)" defined in the Golf Rules of the Japan Golf Association. I have. The unit of length is expressed in inches, which is common in the industry, but conversion to centimeter is 2.
What is necessary is just to multiply by 54.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings. The table shown in FIG. 1 shows club specifications of the golf club set of the first embodiment. The golf club set according to the first embodiment is provided for golfers who are not good at iron clubs having a small iron count of 4 or less, and TANEC, CLUB manufactured by Bridgestone Sports Co., Ltd., which has a long flight distance as the group A. -X, 18
The three utility clubs 0, 190, and 200, and the fifth to ninth specifications that focus on the directionality and accuracy of the flight distance rather than the magnitude of the flight distance as the B group Iron club and pitching wedge (P
And W) six clubs. In addition, in order to facilitate understanding of the present invention, one club of each of the A group and the B group is illustrated in FIG.

The club 1 of the group A has a loft angle θ of less than 30 degrees and a sole width W of 35 mm or more, that is, 40 mm, and has an intermediate head shape between a conventional iron club and a conventional fairway wood club. Have been. The club length is set to 39 inches or longer, which is longer than that of the conventional long iron club. Moreover, the difference in club length between adjacent counts is set as large as 1.5 inches. The head material is a forged titanium alloy having a specific gravity of 4.5.

The clubs 2 of group B have a head shape substantially similar to a conventional iron club in which the loft angle θ is set to a value of 30 degrees or more and the sole width W is set to a value of less than 35 mm. I have. The club length is the standard length of a conventional iron club, and the head material is stainless steel having a specific gravity of 7.8.

Next, the results of a hitting simulation test with a computer performed to confirm the flight distance performance of the golf club set of Example 1 having the above-described configuration will be described. As shown in FIG. 3, the test results show that the flight distance of the clubs of the group A in place of the conventional long irons is large, and the difference in the flight distance between adjacent counts is almost constant for all the clubs in the set. ,
For golfers who are not good at long irons, golf club sets that are easy to swing and easy to capture in golf courses have been obtained.

FIG. 4 is a table showing club specifications of the golf club set of the second embodiment. The golf club set of the second embodiment is also provided for golfers who are not good at iron clubs having a small iron count of 4 or less. Utility clubs X1, X2, and X3 with a head shape close to a long iron and three prototype clubs, and an example in which the direction of the hit ball and the accuracy of the flight distance are emphasized rather than the size of the flight distance as the B group 1 and 6 of the same iron and wedge clubs.

The club 3 of the group A has a loft angle θ of less than 30 degrees and a sole width W of 35 mm or more.
Although it is a utility club, it has a head shape close to that of a conventional long iron club. The club length is longer than that of the conventional long iron club.
It is set to inches or more. The difference in club length between adjacent counts is set to 1.0 inch, which is considerably larger than 0.5 inches for a conventional long iron. The head material is stainless steel having a specific gravity of 7.8.

The clubs 2 of the group B have a loft angle θ of 30 degrees or more and a sole width W of less than 35 mm, and have the same head shape as the conventional iron club. It is the same iron club. The club length is the standard length of a conventional iron club, and the head material is stainless steel having a specific gravity of 7.8.

Next, a result of a hitting simulation test similar to that of the first embodiment performed to confirm the flight distance performance of the golf club set of the second embodiment having the above configuration will be described. As shown in FIG. 5, the test results show that the flight distance of the clubs of the group A instead of the conventional long iron is increased, and the difference in the flight distance between the adjacent counts is almost constant for all the clubs in the set. For golfers who are not good at long irons, it is easy to use,
A golf club set that allows easy capture of a golf course has been obtained.

[0021]

In the golf club set according to the present invention, a so-called long and medium distance club having a loft angle of less than 30 degrees, which is difficult for an average golfer to hit easily and whose flight distance tends to decrease, has a sole width as wide as 35 mm or more. ,
Also, since the club length is set to be longer than 39 inches and the head is made of a material having a low specific gravity, the present invention is directed to a group of clubs called group A in the present invention. The average golfer can easily achieve the flight distance when a conventional long iron is hit with advanced technology by making it easy to hit the ball in accordance with a general swing trajectory. In addition, by adding an iron club having a loft angle of 30 degrees or more and having almost the same specification as that of the related art as a group B to the club of the group A as a club for medium and short distances, a long and medium distance in the set can be obtained. Since the difference in flight distance between adjacent clubs can be made substantially the same for each club over a short distance, it is easy to use for golfers who are not good at long irons such as average golfers, and it is easy to capture golf courses We can provide golf club sets.

[Brief description of the drawings]

FIG. 1 is a table showing club specifications of a golf club set according to a first embodiment.

FIG. 2 is a diagram exemplifying clubs of group A and group B according to the embodiment.

FIG. 3 is a view showing a flight distance characteristic of the golf club set of Example 1.

FIG. 4 is a table showing club specifications of a golf club set according to a second embodiment.

FIG. 5 is a view showing a flight distance characteristic of the golf club set of Example 2.

FIG. 6 is a specification table of a conventional set in which flight distances for each count are confirmed.

FIG. 7 shows a flight distance per count of a person of ordinary skill in a conventional set.

[Explanation of symbols]

 1 Club of Group A (of Example 1) 2 Club of Group B 3 Club of Group A (of Example 2) θ Loft angle W Head width

Claims (3)

[Claims] 1. A golf club set comprising two types of clubs A and B, wherein a club of a group A comprising a club having a loft angle set to a value of less than 30 degrees has a sole width of 35 mm. The golf club set described above, wherein the sole group width is less than 35 mm in the clubs of the group B composed of the clubs whose loft angles are set to a value of 30 degrees or more. 2. The golf club set according to claim 1, wherein the club length of the group A clubs is set to 39 inches or more. 3. The golf club set according to claim 1, wherein the head material of the group A clubs has a specific gravity of less than 7.0.