JPH0871188A - Sand wedge - Google Patents

Abstract

PURPOSE: To provide a sand wedge which is capable of easily spinning a ball by decreasing the resistance to sand, water, etc. CONSTITUTION: The periphery of a sweet spot area 12 of a club face 11 of the sand wedge 10 provided with a first through-hole group 13 arriving at the rear surface from the front surface of the club face. The outer periphery thereof is provided with a second through-hole group 17 larger than the diameter of the first through-holes so that the sand and water are smoothly discharged. The edges of the respective holes of the first through-hole group 13 are provided with lands 14. These lands 14 are slightly projectable from the front surface of the club face 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a golf club head having an iron head, which is commonly referred to as a sand wedge club face, which is improved to reduce the sand resistance during a bunker shot and stabilize the swing trajectory. .

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional sand wedge 1 has a club face 2 having a larger area than other iron clubs, and a sole 4 and a sole 4 at the center including a sweet spot area 3. Multiple parallel shallow grooves 5 are provided so that spin on the ball can be controlled. Further, the sole 4 is formed thick so as not to enter the sand of the bunker more deeply than necessary.

[0003]

During an explosive shot in a bunker, the sand wedge has a wide club face, which causes unexpected sand resistance, resulting in swing trajectory fluctuations and swing speed fluctuations. As a result, the ball does not follow the trajectory as you imagined.
Beginner golfers with inconsistent swing trajectories tend to have more unstable swings due to sand resistance. In addition, the difficulty of hitting a ball in a puddle of a bunker or a shallow water hazard while playing in the rain is even higher.

Therefore, a first object of the present invention is to provide a sand wedge in which the resistance of sand and water is minimized.

Furthermore, during an explosion shot, sand is present between the ball and the club face, and it is difficult for the ball to spin, and it is difficult to stop the ball at a predetermined position by spinning on the green.

Therefore, a second object of the present invention is to provide a sand wedge which easily spins a ball.

[0007]

In order to reduce the resistance of sand which is the first problem, in the first invention, the first penetration from the front surface to the back surface is made in the club face around the sweet spot area. A hole group is bored, and a second through hole group having a diameter larger than that of the first through hole is provided around the first through hole.

The cross section of each hole of the first through hole group can be gradually enlarged from the front surface to the back surface of the club face.

In order to impart an effective spin to the ball which is the second object, in the second invention, lands are provided at the edges of the respective holes of the first through hole group, and the lands are provided on the club face surface. I made it protrude a little more.

In order to freely set the land width of each hole of the first through hole group and the height of the protruding portion, a cylindrical piece separate from the club head main body is press-fitted and locked. Can be adopted.

[0011]

In the first aspect of the present invention, if the first through hole group is made sufficiently smaller than the diameter of the ball, the directionality of the hit ball is not hindered even on a miss shot. Then, when the explosion shot is performed in the bunker, the sand interposed between the ball and the surface of the face is shocked and diffused, and is first discharged from the first through hole group to the back surface side. Further, a large amount of sand existing around the ball and directly scooped by the face surface is discharged to the back side from the second through hole group having a diameter larger than that of the first through hole formed on the outer periphery of the first through hole group. To be done. Under certain circumstances, when hitting the ball cleanly, the sweet spot area of the sand wedge of the present invention is not different from the conventional face, and it is not necessary to make a special swing.

In the sand passing through the first through hole group, the particles are closely adhered to each other on the front and back of the swing locus, and there is a tendency for the particles to scatter laterally, so that the cross section of the through hole advances from the face surface to the back surface. The clogging can be prevented by gradually enlarging.

In the second aspect of the invention, the land of the first through hole group slightly projecting on the face surface acts as a convex scratching object on the ball rolling or sliding with sand on the face surface. As compared with the conventional multi-thread groove, which is apt to cause clogging due to sand, it is possible to reliably spin the ball.

Further, if the cylindrical piece for each single hole of the first through hole group including the land portion is made of hard rubber, the damage to the ball is reduced and the effect of the ridge as a scraped object is also the same. Can be demonstrated. It can also reduce the water resistance when hitting a ball in a puddles in a bunker or a shallow water hazard in the rain, just like sand.

[0015]

Embodiments of the present invention will be described below with reference to FIGS.

The sand wedge 10 of the present invention is shown in FIG.
Further, as shown in FIG. 2, a first through hole group 13 which is smaller than the ball B and which does not affect the flight direction even if the sweet spot area 12 is removed and hit is provided around the sweet spot area 12 of the face 11. Further, lands 14 are provided on the edges of the respective holes of the first through hole group 13 and are slightly projected from the surface of the face 11.
It is preferable that the protrusion amount h is approximately 0.3 to 0.6 mm.

If the inner diameter d ₁ on the front surface side and the inner diameter d ₂ on the rear surface side of each of the first through-hole groups 13 are formed so as to gradually increase in the rear surface direction as d ₁ <d ₂ , the sand will be discharged. It will be easier.

Each of the first through hole group 13, the land 14 and the inner circumference of the hole are preferably made of a material different from that of the head of the sand wedge, and the height of the protruding portion of the land 14 can be freely set. Therefore, if the cylindrical piece 15 separate from the club head is press-fitted and locked, the manufacture is easy. Further, in order to prevent damage to the ball, the cylindrical piece 15 may be made of hard rubber having a hardness close to that of the skin of the ball B. Further, the through hole group 13 includes the face 11
The sand can be more effectively released by providing it in a direction substantially parallel to the sole 16 than by providing the sand at a right angle to the surface.

A second through hole group 17 having a diameter larger than that of the first through hole is provided above the first through hole group 13. The through hole group 17 is also preferably provided in a direction closer to the sole 16 than in the right angle of the face 11.

[0020]

As described in detail above, according to the present invention, since the first through hole group extending from the club face surface to the back surface is formed around the sweet spot area on the club face surface, the explorer in the bunker is formed. At the time of john shot, the sand intervening on the surface of the ball and the club face is shockedly diffused and first discharged from the first through hole group to the back surface side. Furthermore, since a large amount of sand existing around the ball is discharged from the second through hole group to the back side, the resistance of the sand is averaged even in the case where the hitting point is likely to be out of order, such as a beginner golfer, and the swing speed is increased. The rate of miss shots due to fluctuations in the swing and blurring of the swing locus becomes low.
Therefore, the sand wedge of the present invention enables a swing with a good swing-out, and the resistance of water is reduced and the swing trajectory is stable even when hitting a ball standing in a puddle of a bunker or a shallow water hazard during rain. Is possible.

The first area around the sweet spot area
By providing a land on the edge of the through hole group and slightly projecting from the club face surface, in the conventional sand wedge, at the time of the explosion shot in the bunker,
The multiple shallow grooves on the club face surface were buried in the sand, making it difficult to spin the ball and making it difficult to stop it in place by spinning on the green, but when the ball slides on the club face, The dimples are hooked on the protruding part of the and effective spin can be given.

Further, since the cross section of each hole of the first through hole group is formed so as to gradually expand from the front surface to the back surface of the club face, sand or water passing through the through hole at the time of a bunker shot. The discharge function is improved, and a swing with good swing-out is possible.

Furthermore, since the first through hole group is made of a material separate from the golf head body, the amount of protrusion of the land can be obtained by press-fitting and locking the separate cylindrical piece into the golf head. Can be easily adjusted, and damage to the ball can be mitigated by forming this cylindrical piece from hard rubber.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a club face surface of a sand wedge of the present invention.

FIG. 2 is a club face sectional view showing a usage state of the above sand wedge.

FIG. 3 is a front view of a club face of a conventional sand wedge.

[Explanation of symbols]

1 Conventional Sand Wedge 2 Club Face 3 Sweet Spot Area 4 Sole 5 Shallow Groove 10 Sand Wedge 11 of the Invention 11 Club Face 12 Sweet Spot Area 13 First Through Hole Group 14 Land 15 Cylindrical Piece 16 Sole 17 Second Through Hole Group B Ball h Projection amount d ₁ Small diameter of each first through hole group d ₂ Large diameter of each first through hole group

Claims (4)

[Claims] 1. A first from the club face front surface to the back surface around the sweet spot area on the club face surface.
And a second through hole group having a diameter larger than that of the first through hole is formed on the outer periphery thereof. 2. The sand wedge according to claim 1, wherein there are lands on the edges of the respective through holes of the first through hole group, and the lands slightly project from the club face surface. 3. The cross section of the through hole for each single hole of the first through hole group is gradually enlarged from the front surface of the club face to the rear surface thereof. Sand wedge described in. 4. The member of the through hole including the green land of each through hole of the first through hole group is formed of a material different from the head body of the sand wedge. Item 4. The sand wedge according to any one of items 1 to 3.