JP2000116828A - Wedge club head and golf club set - Google Patents

Abstract

(57) [Summary] [Problem] To be excellent in operability so that a high level of skill near a green is easily exhibited. SOLUTION: In a wedge club head having a loft angle of 45 degrees or more, a top line 2 above a face surface 1 is provided.
Most together with forming a radial 50~80mm arc _{R 2} Metropolitan throughout an arc _{R 1} radius 20~35mm from the apex T to the heel 4 side to the apex T of the position of 20~35mm from toe end 3a of Lower leading edge 5 of face 1
It reaches the majority of the circular arc _{R 4} and the center of the face 1 of the radius 20~35mm toe lower heel 4 radius 140 to 220
to form an arc R ₃ Metropolitan of mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a face shape of a wedge club used particularly around a green, and to a series of face shapes of a plurality of wedge clubs provided in a golf club set. It relates to a wedge club head and a golf club set.

[0002]

2. Description of the Related Art Wedge clubs include a pitching wedge (PW), a pitching sound (PS) or an approach (AW) wedge, a sound wedge (SW), and the like from the smaller loft angle. For short distance use of approximately 120 yards or less, P
S is intermediate between PW and SW or both, and AW is about 80
The SW is used for short distances near the yard, and for shortest distances of less than 60 yards and escape from sandy bunker.

[0003] The shape of these wedge clubs is PW, PW
In addition to gradually increasing the loft angle as the S / AW and the SW are reached, different features are provided for the face, particularly the striking surface, corresponding to the above-mentioned applications.

The golf club set is selected from a plurality of wood clubs, usually nine iron clubs # 1 to # 9, wedge clubs such as PW, PS or AW, SW and putters. It is composed of fourteen, and the iron clubs # 1 to # 9 and the wedge club are collectively referred to as iron clubs.

[0005]

The performance required of a wedge club is that a hit ball is accurately landed on a narrow green (on) except when the ball is hit from a sandy bunker.
The first priority is to stop it. For this reason, it is desired to be able to freely control the accuracy of the flight distance, the height of the ball path, the spin amount of the hit ball, and the like.

[0006] On the other hand, the player tilts the leading edge, which is the lower end contour of the face, to the right (when right-handed) with respect to the target direction (that is, opens the face) with respect to the target direction depending on the situation. To control the pitch and the amount of spin by hitting the face so that the loft angle is large, or conversely raising the face so that the loft angle is small. On the other hand, the player swings down from the outside to the inside, swings straight in the direction of the target, and changes the magnitude of the swing in order to adjust the strength of the hit ball. Again, these skills are becoming increasingly sophisticated. However, in the conventional wedge club, in spite of the need for such various types of punching, the PW is shaped into a shape close to a # 9 iron and specialized in a shape suitable for a full shot near a green. Almost all of the above-mentioned various divisions are designed to be left to PS, AW or SW.

[0007] In addition, in the case of PS, AW and SW, it is difficult for a player of intermediate level or higher, especially in view of the above-mentioned skill level, to swing as expected in order to sufficiently exhibit various advanced techniques. Many complaints have been pointed out in subtle points, such as a sense of incompatibility with the address of the swing trajectory.

[0008] In view of such circumstances, an object of the present invention is to provide a wedge club head having excellent operability that can easily exhibit a high level of skill near a green, and a golf club having such a wedge club. It is to provide a club set.

[0009]

In order to achieve the above object, a wedge club head according to the present invention has a loft angle of 4 degrees.
For a wedge club head of 5 degrees or more, most of the top line above the face is 20 to 35 mm from the toe end
Is formed from an arc having a radius of 20 to 35 mm having a vertex at the position and an arc having a radius of 50 to 80 mm extending from the vertex to the heel side, and most of the lower leading edge of the face surface has a radius of 20 to 35 mm at the lower end of the toe. It is formed from an arc and an arc having a radius of 140 to 220 mm from the center of the face surface to the heel. In addition, the golf club set of the present invention is a golf club set including a plurality of wedge clubs having the above-described head whose loft angle is in a range of 45 to 65 degrees, and a wedge club having a larger loft angle is closer to the toe end. The distance from the top line to the vertex and the value of the radius of the arc at the vertex are set to be large, and the value of the radius of the arc forming the top line from the vertex to the heel side is set to be small.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows that approximately 120
Pitching wedges used at distances of less than yards
It is a front view of a pad. In the figure, the top above the face surface 1
Most of line 2 is located at the top 24mm from toe end 3a
Let R be an arc R with a radius of 21 mm ₁And the vertex as the highest point
From this, a radius of 75 mm reaching the heel 4 side of the face surface 1
Arc R₂It is formed with. In addition, the toe of the face 1
In the lower part of 3, most of the leading edge 5
Lead at the center of the ground surface 1 (half the length of the face)
180mm radius arc R centered on a straight line₃Formed with
And this arc R₃A circle with a radius of 21 mm between the toe end 3a
Arc R₄It is formed with.

The face length, which is the distance from the toe end 3a to the base of the hosel 6 with the face surface 1 as a single surface, is usually 80 to 90 mm, but is 85 mm in this example, and is normally addressed. The height of the face from the leading edge 5 to the vertex T of the top line 2 is 60 mm.

[0013] Here, the arc _{R 1} which forms part of the vertex T of the top line 2 is provided with the magnitude of the radius of 20 to 35 mm from the toe end 3a at a distance of 20 to 35 mm. If the distance and the radius are less than 20 mm, the shape of the toe end 3a of the top line 2 is not rounded and becomes an acute angle and the face surface 1
It is difficult to stabilize the swing trajectory when opening and closing the robot, and it is difficult to apply intentional hooks and slices. On the other hand, if the distance and the radius exceed 35 mm, the area of the toe end 3a side decreases excessively, making it difficult to use a shot approaching the toe end 3a, such as a running approach, or the balance of the moment of inertia is deteriorated. Decreases. In addition, as a preferable range of these values, both the distance and the radius are set to 21 to 30 mm.

Further, the circular arc _{R 2} radius extending from the apex T of the top line 2 to the heel 4 side of the face 1, 50
If the radius is less than 50 mm, the mass of the face surface 1 at the end of the heel 4 decreases, the toe portion becomes relatively heavy, and the operability of the head deteriorates. Conversely, if the radius exceeds 80 mm, the area of the upper part of the face surface 1 on the heel side decreases, and it becomes difficult to apply spin.

Further, an arc R ₄ forming the lower part of the toe
Has a size in the range of 20 to 35 mm, and is preferably set in the range of 21 to 27.5 mm. 2
If the radius is less than 0 mm, it is difficult to separate a wedge that opens and closes the face 1 indispensably. If it exceeds 35 mm, the area of the toe end 3a becomes too small, and it becomes difficult to use a shot approaching the toe end 3a such as a running approach.

The portion of the toe end 3a, that is, the arc R ₁
A portion between the arc R ₄ are conventional manner club design,
It is formed of an arc of an appropriate size (35 mm in this embodiment) that is in contact with both arcs.

Further, the radius of the circular arc _{R 3} to form a leading edge 5 is set in a range of 140～220Mm, and preferably in the range of 170～180Mm. 14
If it is less than 0 mm, it is difficult to align the face surface 1 with the target line, and the shot directionality is deteriorated. If it exceeds 220 mm, it becomes equivalent to the shape of the conventional wedge, and the operability of the club is reduced.

FIG. 2 is a front view of the heads of the PW, PS and SW clubs included in the golf club set according to the present invention. Top line 2, leading edge 5 and toe end 3a of each club
The arcs R _{1 to} R ₄ forming the shape of the portion are set to the values shown in Table 1 below in accordance with the above-described numerical ranges.

[0019]

[Table 1]

That is, as the wedge club has a larger loft angle, the distance from the toe end to the top of the top line at the highest position of the face height and the value of the radius of the arc of the top are set to be larger, and the top line is formed. The value of the arc radius to be set is set small.

FIG. 3 and FIG. 4 show the wedge club according to the present invention in a state where the face surface 1 is opened and closed,
FIG. 5 shows a state in which a face is opened in a conventional wedge club. Reference symbol B in the figure indicates a golf ball. The wedge club of the present invention is easier to set a target direction by an address and to be ready to hold than a conventional one.

[0022]

As described above, the wedge club head of the present invention has a loft angle of 45 degrees or more, and most of the top line above the face surface is positioned 20 to 35 mm from the toe end. It is formed from an arc having a radius of 20 to 35 mm as a vertex and an arc having a radius of 50 to 80 mm extending from the vertex to the heel side, and most of the lower leading edge of the face surface has a radius of 2 at the lower end of the toe.
Since it is formed from an arc of 0 to 35 mm and an arc having a radius of 140 to 220 mm from the center of the face surface to the heel, the contour of the upper end of the face has a round shape as a whole. Accordingly, the area above the face is increased, the center of gravity of the face is increased, and a face shape is easily applied with spin. In addition, the area closer to the heel side from the center of the face increases, and the center of gravity also shifts toward the heel side, so the so-called center of gravity distance is shortened appropriately, the size of the back swing and the trajectory are easily adjusted, and the flight distance and hitting direction control It is possible to provide a club that is easy to perform. Next, in the club head of the present application,
Most of the leading edge below the face is formed by an arc with a radius of 20 to 35 mm at the lower end of the toe and a large arc with a radius of 140 to 220 mm from the center of the face to the heel. It has a rounded outline shape. Therefore, when the face is to be opened (FIG. 3) or closed (FIG. 4), it is easier to set the target direction by the address than in the case of the conventional straight leading edge (FIG. 5). Also,
The swing trajectory can be easily adjusted, accurate directionality can be obtained, and the hit ball can be hooked or sliced appropriately if necessary. Further, the height of the hit ball can be easily adjusted.

In this way, by making the entire upper and lower portions of the face surface moderately rounded, it is possible to freely control the height and strength of the hit ball, how to apply the spin, etc. at a distance of about 120 yards or less to the green. The wedge club head can be provided so that various techniques of an advanced player who stops the ball at a desired position on the green by manipulating the golf ball can be easily realized, and the average golfer can easily adopt the advanced technique. Here, in the present application, the face shape of the PW, which has been considered to be particularly heterogeneous among the wedge clubs in the past, is made to be a shape similar to PS / AW or SW, so that various roles required for the wedge club are described. Can be easily assigned to each wedge club, and appropriate approach shots can be realized in every situation.

Further, as the wedge club has a larger loft angle, the distance from the toe end to the apex of the top line and the value of the arc radius at the apex are set to be larger, and a top line from the apex to the heel side is formed. In a golf club set in which the value of the arc radius to be set is small, P
W, PS / AW, and SW, the overall shape of the face surface is sequentially grouped into a rounded shape, so the wedge clubs in the set responded to any situation around the green, including escape from the bunker. Club selection becomes possible, and the disadvantages of covering different PWs with unreasonable hitting and wrinkling various approach shots on PS / AW and SW as in the conventional set are eliminated.

[Brief description of the drawings]

FIG. 1 is a front view of a wedge club head according to the present invention.

FIG. 2 is a front view showing the face faces of the PW, PS, and SW clubs in an overlapping manner.

FIG. 3 is a view showing a state in which a wedge club head of the present invention is opened.

FIG. 4 is a view showing a state in which the wedge club head of the present invention is closed.

FIG. 5 is a view showing a state in which a conventional wedge club head is opened.

[Explanation of symbols]

1 face surface 2 top line 3a toe end 4 heel 5 leading edge R ₁ to R ₄ arc T vertices

Claims (2)

[Claims] 1. In a wedge club head having a loft angle of 45 degrees or more, most of the top line above the face surface is set at 20 degrees from the toe end.
It is formed from an arc having a radius of 20 to 35 mm having an apex at a position of about 35 mm and an arc having a radius of 50 to 80 mm extending from the apex to the heel side, and most of the lower leading edge of the face surface has a radius of 20 to A wedge club head comprising a 35 mm arc and a 140 to 220 mm radius arc from the center of the face to the heel. 2. A golf club set comprising a plurality of wedge clubs according to claim 1, wherein a loft angle is in a range of 45 to 65 degrees, wherein a wedge club having a larger loft angle has a top line apex from a toe end. And the value of the arc radius at the apex is set to be large, and the value of the arc radius forming the top line from the apex to the heel side is set to be small. .