JP3008106B1 - Iron club - Google Patents

Abstract

A sole is provided with a concave portion that allows the player to swing through without lowering the swing speed and correct even if the face enters openly. A recess (18) is formed from a leading edge (16) side of an iron club sole (15) to a back face (17) side. The recess 18 has a point A near the heel 19 and a point B near the toe 20 of the leading edge 16.
Is a chord, and has a substantially semicircular shape toward the back face 17 side. Thereby, the leading edge 16
The portion of the club head that comes in contact with the ground is reduced by the amount corresponding to the formation of the concave portion 18, and the club head can be swung without lowering the swing speed by that much and without the club head going deeply into the ground. Since the point of contact with the ground moves in an arc shape to the center of the club head along the peripheral edge 22 of the concave portion 18, the direction of the face 21 is stabilized, and has the function of correcting the open face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron club in which a concave portion is formed in a sole of an iron club to reduce a resistance when a club head comes into contact with the ground, thereby preventing a swing speed from lowering. It is about.

[0002]

2. Description of the Related Art Golf iron club heads have been developed to have a variety of structures and shapes due to the rise of golf theory and new swing theory, and are also accepted by many golfers in terms of design. New things are being developed one after another. Basically,
The types are roughly classified into those shown in FIGS. FIG. 4 shows an analysis of the club head from the lateral direction (analysis from the front side of the club face). FIG. 1A shows a club head 1 of a Scotch style, in which a sole 2 is slightly rounded and a toe 3 is a square. FIG. (B) shows a club head 4 in a traditional conventional style, in which the toe 3 is rounded and the upper and lower face edges 5, 6 are straight. In addition, when viewed from the address position, the leading edge 7 is completely parallel to the scoring 8 and the setup direction is excellent.
FIG. 1C shows a non-heel style club head 9 developed by a budding manufacturer in the United States, in which the leading edge 7 protrudes downward in a curved shape and has a bulging shape (round sole).

FIG. 5 shows various types of sole shapes obtained by analyzing a club head from a vertical direction. Figure (A)
Is a traditional sole 10 with a relatively narrow sole width and a flat shape. In the conventional sole 10, the head itself shows stable sitting on a plane. FIG. (B) shows the vance sole 11 in which the sole is flat but has a vance angle. The bounce sole 11 is provided to give a momentum when driven, and the sands wedge has the greatest feature, and the bounce angle ranges from 10 to 20 degrees. FIG. (C) shows the scoop sole 12 having an angle opposite to the bounce angle. This club head has a feature that the back edge of the sole is raised at the time of impact, so that the loft tends to increase, the ball easily hits a high position of the face, and a scooped-up ball tends to come out. FIG. 3D shows a cambered sole 13 having both a bounce angle and a scoop angle. This club head seems to have little contact with the turf on the sole and low resistance, and is used by beginners to intermediate players.

[0004]

As described above, iron clubs of various shapes have been developed. In actual play, the most important thing is that the swing speed does not decrease at impact, and the player can swing through. It is.
However, in the conventional iron club, regardless of the shape of the iron club, the entire leading edge 7 comes into wide contact with the ground in the course of a swing, and this contact is directed deeper into the ground. Acting and taking turf thick. This tendency was particularly remarkable in the case of the round sole shown in FIG. Therefore, the contact resistance with the ground becomes large, and the swing speed sharply decreases just before the impact with the ball, thereby causing a problem that the flight distance is reduced and the directionality is likely to be unstable.

In the conventional iron club, when the face enters the open state, the club head tries to come into contact with the ground while the leading edge 7 sequentially shifts from the heel side to the toe side. Such resistance due to contact with the ground acts in the direction of delaying the toe side of the club face with respect to the club head, and increases the loft angle more than necessary (makes the face lie down). As a result, the face remained open even when the transition from impact to follow-through occurred, and the hit ball rose too much and dropped the flight distance, resulting in a large slice.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems and has been improved and eliminated. It is an object of the present invention to provide an iron club having a sole provided with a concave portion acting in a direction to correct the contact when the sole comes into contact with the sole.

According to the first aspect of the present invention, there is provided an iron club in which a recess is formed from a leading edge side of a sole of the iron club toward a back face side. . By forming the concave portion, the portion of the leading edge that contacts the ground during the swing is reduced by the concave portion, and the swing speed is not reduced by that much. Also, the club head does not enter the ground deeply. Therefore, it is possible to provide an iron club with a good swing.

[0008] The means of claim 2 adopted by the present invention is:
A concave portion is formed from the leading edge side of the sole of the iron club toward the back face side, and the concave portion has a chord as a straight line connecting a point closer to the heel and a point closer to the toe of the leading edge. An iron club characterized by being formed in a substantially semicircular shape. In the club head, since the heel side and the toe side of the leading edge make contact with the ground, the contact resistance is reduced, and the face direction is stabilized. That is, it is possible to swing without lowering the swing speed. In addition, since the point of contact with the ground moves in an arc from the heel side and the toe side of the leading edge to the center of the club head along the periphery of the recess, the face direction is stabilized, and the hit ball can fly. Excellent directionality.
Also, if the open face comes into contact with the ground, the arc-shaped perimeter of the recess will come into contact with the ground so that the heel side will be delayed, and as a result, the toe side will return faster and will have the function of correcting the open face .

Further, the means of claim 3 adopted by the present invention is as follows.
3. The iron club according to claim 1, wherein the recess is formed to have a bounce angle. 4. When the concave portion has the bounce angle, the bounce when contacting the ground is improved, the contact resistance is reduced as much as possible, and the swing-out is improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the embodiments of the invention shown in the drawings. The same reference numerals as those in the conventional case denote the same members. 1 to 3 relate to one embodiment of the present invention,
FIG. 1A is a perspective view of the club head 14 as viewed from obliquely below the toe on the club face side, and FIG. 1B is a perspective view as viewed from obliquely below the toe near the back face side. FIG. 2A is a view of the face as viewed from the front, and FIG. 2B is a view of the club head 14 as viewed from the bottom. Further, FIGS. 3A to 3D are longitudinal sectional views when the present invention is applied to one having a different sole shape.

As shown in FIG. 1, in this embodiment, a concave portion 18 is formed from the leading edge 16 side of the sole 15 of the club head 14 to the back face 17 side. This recess 18 is used for leading edge 1
A straight line connecting a point A near the heel 19 and a point B near the toe 20 is a chord, and is formed in a substantially semicircular shape toward the back face 17. Moreover, the concave portion 18 can be applied to various sole shapes such as a conventional sole 10, a vance sole 11, a scoop sole 12, and a camber sole 13 as shown in FIGS. 3A to 3D. When applied to these soles, the concave portion 18 itself is formed to have a predetermined bounce angle. Further, the recess 18 may be formed integrally with the molding of the club head 14 at the time of press-forming the raw material for forging, or by grinding and cutting an already commercially available iron club. Good. Note that, in FIGS. 1A and 1B, a shaded line indicating the curved shape of the concave portion 18 is displayed.

By forming such a concave portion 18, the club head 14 exhibits a new function which cannot be found in a conventional club described below. That is, when swinging with an iron club using this club head 14, the leading edge 16
The part that contacts the ground first is the point A on the heel side.
And point B on the toe 20 side. That is, the area of the portion in contact with the ground is reduced by the area between the point A and the point B where the recess 18 is formed, as compared with the conventional iron club. Generally, as the area of the portion of the club head 14 that comes into contact with the ground increases, the contact resistance increases accordingly, causing a reduction in swing speed. Therefore, in the club head 14, the swing can be performed without lowering the swing speed by the reduced area of the portion that comes into contact with the ground due to the formation of the concave portion 18,
It becomes an iron club that can be swung well. In addition, only the portion in contact with the ground is the portion of point A and the portion of point B,
The club head does not try to enter the ground deeply due to the leading edge unlike the conventional round sole, and it is possible to make a swing that takes a thin turf. One.

Further, the club head 14 comes into contact with the ground at two points separated by a predetermined distance between the point A on the heel 19 side and the point B on the toe 20 side of the leading edge 16, so that the orientation of the club face 21 is stable. It will be. The stability of the orientation of the face 21 is such that the contact portion with the ground moves from the two separate points A and B to the center point C along the arc-shaped peripheral edge 22 of the recess 18 respectively. The movement of the contact point with the ground from the two points A and B apart from each other has a function of maintaining the direction of the face 21 while correctly pointing it in the swing direction,
This is to stabilize the direction of the face 21. At the time of moving to the center point C, the contact with the ground is released, and the swing shifts to follow-through. This allows the ball to fly straight in the swing direction.

Furthermore, in the club head 14, when the face 21 is swung down in an open state, the heel 19 side is delayed, the toe 20 side is easily turned, and the face 21 is corrected. is there. As shown in FIG. 2B, when the club head 14 descends in an open face state, the point A on the heel 19 comes into contact with the ground, and the contact point with the ground Moves to the center point C along the arc-shaped peripheral edge 22 of the concave portion 18 as the swing advances. At this time, on the arc-shaped peripheral edge 22 from the point A to the point C, a resistance to the rear side indicated by a symbol A is generated so as to delay the heel 19 side of the club head 14. As a result, a force that travels in the swing direction is generated as a reaction force on the toe 20 side, so that the so-called toe 20 side returns faster. As a result, the open face 21 can recover it by the delay of the toe 20 side, is corrected to a square so as to correctly face the target, and can fly the ball straight in the swing direction.

Such a novel function of the club head 14 is not affected by the condition of the lie on the golf course, and is not affected by fairway, rough, semi-rough, deep rough, bare ground, bunker, etc. It can be exerted even at the time of a shot, so that ideal golf can be performed without lowering the swing speed and stabilizing the directionality.

Incidentally, the present invention is not limited to the above-described embodiment, and can be appropriately changed. For example, the bounce angle provided in the concave portion 18 is for improving the momentum in contact with the ground, making the contact resistance as small as possible, and improving the swing-out. May be arbitrarily set in accordance with. In addition, the length of the recess 18 at the leading edge 16 and the width and depth of the back face 17 can be arbitrarily changed.

[0017]

As described above, in the present invention,
Since the concave portion is formed from the leading edge side of the sole of the iron club toward the back face side, the portion of the leading edge that contacts the ground during the swing is reduced by the concave portion, and the swing speed is reduced accordingly. And the club head does not go deeply into the ground, and the swing is improved.

Further, in the present invention, the straight portion connecting the point near the heel and the point near the toe of the leading edge is a chord, and the recess is formed in a substantially semicircular shape on the back face side. Moves in an arc from the heel side and the toe side of the leading edge to the center of the club head along the peripheral edge of the concave portion, so that the face is stably trying to escape in a certain direction and the hit ball Excellent flight direction. Also, if the open face comes into contact with the ground, the arc-shaped periphery of the recess will come into contact with the ground so that the heel side will be delayed, and as a result, the toe side will return faster and will have the function of correcting the open face .

Furthermore, according to the present invention, since the concave portion is formed to have a bounce angle, the moment when it comes into contact with the ground is improved, and the contact resistance is reduced as much as possible. Can be further improved.

[Brief description of the drawings]

1A and 1B show a club head according to an embodiment of the present invention, in which FIG. 1A is a perspective view of a face side toe near a toe, and FIG. 1B is a back face side toe. It is the perspective view seen from the slanting lower part near.

FIGS. 2A and 2B show a club head according to an embodiment of the present invention, wherein FIG. 2A is a view of a face as viewed from the front, and FIG. 2B is a view of a club head as viewed from the bottom.

FIG. 3 relates to an embodiment of the present invention, and FIGS. 3A to 3D are longitudinal sectional views when applied to club heads having different sole shapes.

4 (A) to 4 (C) are diagrams showing club heads having different shapes as viewed from the face side, according to the related art.

5 (A) to 5 (D) are views of a club head having a different sole shape as viewed from the toe side according to the prior art. FIG.

[Explanation of symbols]

14 ... club head 15 ... sole 16 ... leading edge 17 ... back face 18 ... concave portion 19 ... heel 20 ... toe 21 ... face 22 ... arc-shaped periphery

Claims (3)

(57) [Claims] 1. An iron club, wherein a recess is formed from a leading edge side of a sole of the iron club toward a back face side. 2. A concave portion is formed from the leading edge side of the sole of the iron club to the back face side, and the concave portion is a string formed by connecting a straight portion connecting a point near the heel and a point near the toe of the leading edge. An iron club characterized by being formed in a substantially semicircular shape toward the back face side. 3. The iron club according to claim 1, wherein the recess has a Vance angle.