JP3244126B2 - Iron golf 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 golf club set, and more particularly, to a combination iron golf club set having a long side made of a non-metallic iron and a short side made of a metal iron. And an iron golf club set in which the tendency of the angle formed between the vertical line of the shaft axis and the extension line of the face surface of the club head is set to the same tendency.

[0002]

2. Description of the Related Art Conventionally, in the iron golf club set, a metal iron set in which a long side to a short side is unified with a metal head has been the mainstream, but recently, a long side is constituted by a non-metallic iron, and a middle to short side is used. A combination iron golf club set whose side is made of metal iron is commercially available.

[0003]

However, in the case of the combination iron golf club set as described above, a non-metallic iron such as a carbon iron is used in a club at a connecting portion between a non-metallic iron and a metal iron such as a carbon iron. When the metal iron club at the connection portion is swung by the same swing as the above, there is a problem that a miss shot, that is, a variation in directionality of the hit ball is likely to occur.

[0004] One reason for this is that the angle between the vertical line of the shaft axis of the golf club and the extension of the face of the club head, the so-called center of gravity, tends to depend on the iron count of the non-metallic iron and the metallic iron. As shown in FIG. 4 (a), the middle iron part is greatly different and forms a fault. This comes from a fundamental difference in the material and structure of the club head, but as a result, it has made it difficult to hit the non-metallic iron side and the metallic iron with the same swing.

[0005] The center of gravity angle θ refers to the fact that the club head 2 of the iron golf club 1 protrudes from the horizontal base 3 as shown in FIGS. 5 and 6 (a), (b) and (c). When the club head 2 is allowed to stand horizontally, the center of gravity of the club head 2 is located immediately below the shaft axis 4 so that the club head 2 is stable, and the vertical line Y of the shaft axis 4 of the golf club at this time.
And an angle θ between the extension line X of the face surface 5 of the club head.

That is, the center of gravity angle θ of the long club head 2a and the center of gravity angle θ of the middle iron club head 2b
And the center-of-gravity angle θ of the club head 2c on the short side is greatly different and has a step. The magnitude of the center-of-gravity angle θ differs depending on the distance between the position of the center of gravity of the club head 2 and the shaft axis 4 and the direction. Therefore, for each value such as the depth of the center of gravity and the distance from the shaft axis 4 to the center of gravity discussed in the club head of the conventional golf club, the center of gravity angle θ is a comprehensive evaluation of these values.

An example of the measured value of the center of gravity angle θ in the conventional combination iron golf club set is as follows.

[Table 1] The present invention, according to the conventional problems was devised in view, an iron golf and non-metallic iron side and the metal iron can similar swing, yet which can be the direction of the hit ball and favorable The purpose is to provide a club set.

[0008]

SUMMARY OF THE INVENTION The present invention, in order to achieve the above object, a non-metallic iron long side, in combination iron golf club set which constitutes the short side with a metal iron, a golf club is a club head horizontal When standing horizontally so that it protrudes from the table,
For a center of gravity angle defined by an angle formed between a vertical line extending vertically from the shaft axis of the golf club in the vertical direction and an extension of the face surface of the club head projected on a plane perpendicular to the shaft axis, the club having the center of gravity angle trend for the count of the set are continuous from the non-metallic iron to metal Iron
So that the shaft axis at the neck of each club head
The point is that the shift amount in the toe direction has been adjusted .

[0009] In addition, the club set of the center of gravity angle
The that trend, set gradually decreased non-metallic iron to metallic iron, set to be substantially the same non-metallic iron to metallic iron, it is possible to set gradually increased until the metal irons from further nonmetal Iron .

[0010]

According to the present invention, there is provided an iron golf club set constructed as described above and combining a non-metallic iron side and a metal iron. It is possible to hit the ball with the same swing, and the swing at the connection between the non-metallic iron side and the metal iron, which has been difficult conventionally, can be performed smoothly, and the directionality of the hit ball is good It can be. It can be used as an optimal golf club set.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, the same components as those of the conventional example will be denoted by the same reference numerals. FIG. 1 (a),
(B) is a front view and a side view of a long iron golf club embodying the present invention, and (a) and (b) of FIG. 2 are a front view, a side view, and a diagram of a middle iron golf club embodying the present invention. 3 (a) and 3 (b) show a front view and a side view of a short iron golf club embodying the present invention, 6 shows a club shaft, 4 shows a shaft axis of the golf club, and in the embodiment of the present invention, The tendency of the center-of-gravity angle θ is gradually reduced from the non-metallic iron to the metallic iron as shown by the lines a to c in FIG.
They are set so as to be substantially the same or to be set gradually larger.

[0012] As a means to continuously centroid angle θ of the difficult theoretically is a set of club set having a conventional shape, as shown in FIG. 1 (a) and in FIGS. 2 (a) By shifting the shaft axis 4 of the neck portion 7a of the club head 2 in the direction of the toe 7b and adjusting the shift amount L, the center-of-gravity angle θ can be continuously changed.

With the above-described structure, in the iron golf club set in which the non-metallic iron side and the metallic iron are combined, the non-metallic iron side and the metallic iron are similarly set by making the center of gravity angle continuous. It is possible to hit the ball with the swing, and it is possible to smoothly perform the swing of the club at the connection between the non-metallic iron side and the metal iron, which has been considered difficult in the past,
The directionality of the hit ball can be improved.

Further, the number of missed shots in which the hit ball swings in the left-right direction is reduced, so that even a beginner or a low hitter having a low head speed can be used as an iron golf club set having an optimal combination.

[0015]

According to the present invention, there is provided a combination iron golf club set comprising a non-metallic iron on the long side and a metallic iron on the short side as described above .
When the golf club is allowed to stand horizontally so that the club head protrudes from a horizontal table, a vertical line extending vertically from a shaft axis of the golf club, and a club head projected on a plane orthogonal to the shaft axis. for the center of gravity angle defined by the angle between the extension line of the face surface, of each club head such tendency for count of club set of heavy hearts angle are continuous non-metallic iron to metallic iron net
Adjust the amount of shift of the shaft axis in the toe direction at the
As a result, it is possible to hit the non-metallic iron side and the metallic iron side with the same swing, and the club swing at the connection between the non-metallic iron side and the metallic iron side, which has been considered difficult in the past, is particularly improved. It can be performed smoothly and the directionality of the hit ball can be improved. In addition, the number of missed shots in which the hit ball swings in the left-right direction is reduced, so that even a beginner or a low hitter with a low head speed can be used as an iron golf club set of an optimal combination.

[Brief description of the drawings]

FIGS. 1A and 1B are a front view and a side view of a long iron golf club according to an embodiment of the present invention.

FIGS. 2A and 2B are a front view and a side view of a middle iron golf club according to an embodiment of the present invention.

FIGS. 3A and 3B are a front view and a side view of a short iron golf club according to an embodiment of the present invention.

FIG. 4A is a graph explanatory diagram showing a relationship between a center of gravity angle and a club number of an iron golf club set of a conventional combination. (B) is a graph explanatory view showing the relationship between the center of gravity angle and the club number of the iron golf club set of the combination embodying the present invention.

FIG. 5 is an explanatory diagram showing a method of measuring the center of gravity angle of the club head.

FIGS. 6 (a), (b) and (c) are illustrations of the center of gravity angle of a club head of a conventional iron golf club.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Iron golf club 2 Club head 4 Shaft axis 5 Face plane Y Vertical line of shaft axis X Extension of face plane θ Center of gravity angle

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Practical application Microfilm (JP, U) (JP, U) which photographed the contents of the specification and drawings attached to the application form of Japanese Patent Application No. 63-98286 (Japanese Utility Model Application No. 2-20574). 58) Field surveyed (Int.Cl. ⁷ , DB name) A63B 53/00 A63B 53/02

Claims (4)

(57) [Claims] 1. A combination iron golf club set comprising a non-metallic iron on a long side and a metal iron on a short side, when the golf club is allowed to stand horizontally so that the club head protrudes from a horizontal base.
For a center of gravity angle defined by an angle between a vertical line extending vertically from the shaft axis of the golf club in a vertical direction and an extension of the face surface of the club head projected on a plane perpendicular to the shaft axis, the club having the center of gravity angle trend for the count of the set are continuous from the non-metallic iron to metal Iron
So that the shaft axis at the neck of each club head
Iron golf club set with the amount of shift in the toe direction adjusted . 2. The iron golf club set according to claim 1, wherein the tendency of the center of gravity angle to the club number of the club set is gradually reduced from a non-metallic iron to a metal iron. 3. The iron golf club set according to claim 1, wherein the tendency of the center of gravity angle to the club number of the club set is set to be substantially the same from non-metallic irons to metallic irons. 4. The iron golf club set according to claim 1, wherein the tendency of the center of gravity angle to the club number of the club set is gradually increased from a non-metallic iron to a metallic iron.