JPH11137746A - Patter head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a putter which enables a player to easily have a feel for distance between the hole and ball positions and to always visualize a given rolling line and to ensure cup-in by making an accurate aiming and side-putting that minimizes the putter head to deviate from the line. SOLUTION: A head main body 2 is formed with the point G of center of gravity aligned with the center position between upper and lower sides and left and right sides of the face 1 by using an aluminium alloy. The area extending from the point G of center of gravity to right and left about 20 mm is set to the face central area C, and on the whole surface, linear strap flaws 11 with a depth of 1/10-1/100 mm with longitudinal grooves by a ball mill. Further, in the right and left areas outside the central area C, linear strap flaws 12 with a depth of 1/10-1/100 mm are cut as lateral grooves. In the case of the longitudinal grooves 11 and the lateral grooves 12, the pitch of centers of the grooves can be freely set according to the groove depth, for example, it is set to about 0.3 mm. Thus, light reflection differs with the respective areas so that the central area C can be clearly visually confirmed from its reflecting state so as to accurately grasp a ball.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a golf club putter head.

[0002]

2. Description of the Related Art In recent years, golf club heads have generally been increasing in size. In particular, this is for increasing the moment of inertia of the club head to improve the directionality of the hit ball. For putter heads, recently, a shape has been adopted in which the moment of inertia on the toe side and the heel side of the head is large, so that even if the head is hit slightly off the center of the face surface, the hit ball advances accurately in the target direction. As a result, the face length tends to be longer.

[0003]

However, as the face length has increased, there has been a risk that the frequency of putting mistakes that do not strike the center area of the face surface may increase. In addition, there is an object in which a guide line parallel to the striking direction is provided with a white paint or the like on the upper surface side of the head, for example, a crown portion to indicate a central region of the face surface. As a result, the shape of the head is restricted and the degree of freedom in designing the head shape is reduced.

It is an object of the present invention to provide a putter head which can easily hit a ball on a central area of a face surface during putting.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is directed to a fine line having different directions in a central region of a face surface and left and right regions adjacent to the central region. A mark is provided.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

The putter head shown in FIG. 1 is a putter head called a mallet type. The center of gravity G of the face 1 is 110 mm at the center of the face 1 having a length of 110 mm and a height of 26 mm. Have been matched. The head body 2 is made of an aluminum alloy. After the entire body is first formed into a predetermined shape by casting, the face 1 is machined (NC processed) by a ball mill. At the time of the NC processing of the face 1, the center area C of the face 1 is set within a range of 20 mm to the left and right from the center of gravity G of the face 1, and the entire surface of the area C is 1/100 mm by a ball mill.
Streaks 11 of the vertical flute are carved as shown in FIG. On the other hand, in the left and right regions other than the central region C of the face surface 1, similarly, a line groove 12 having a depth of 1/100 mm is formed by a ball mill as shown in FIG. Further, a shaft 3 is mounted on the head main body 2.

The pitch between the center of the vertical groove and the horizontal groove is automatically set according to the groove depth. In the present embodiment, it is 0.3 mm. When the processing of each groove is completed, a normal buff finish is applied to the face surface by a sponge sander to obtain a product.

In the above embodiment, the putter is a mallet type. However, for the purpose of the present invention, the present invention is applicable to various types of putters such as a pin type, an L type, and a cash-in type. . Further, the linear streaks 11 and 12 are not limited to the horizontal groove and the vertical groove, but may be oblique grooves. In contrast to the embodiment, horizontal and vertical grooves are formed in the central region C, and both sides are formed. A vertical groove may be formed.

[0010] In putting, the requirement for hitting in the correct direction with a desired strength is that a face passing through the center of gravity of the head main body 2 is defined as a point on the face surface 1 perpendicular to the face surface 1. It is known that the impact should be performed at the center of gravity G of the surface 1 or at the intersection of the face height bisector X and the extension of the shaft axis Z on the face 1 (see FIG. 2). The center of gravity G of the face surface 1 is the center of impact. Assuming that a vertical line passing through the center of gravity G (center of impact) G and orthogonal to the bisector X is Y, the range of 10 mm to the left and right of the vertical line Y is the lower limit. The center area C was determined with the upper limit of the range of 25 mm. If the width of the central region C is smaller than the lower limit, it becomes visually difficult to identify the central region C depending on the light reflection state and the arrangement of the shaft 3. When the width of the central area C exceeds the upper limit,
Both end portions of the central region C are too far from the impact center G, so that the strength of the hit ball and the accuracy of the hitting direction are lost.

Further, the depth of the streak marks 11 and 12 is as follows:
It is preferable to set the distance between 1/10 and 1/1000 mm. If the depth is reduced to less than 1/1000 mm, light reflection may not be distinguished between the central region and other regions. Further, when the depth exceeds 1/10 mm, the pitch of the traces is inevitably coarsened, the appearance is inferior, and unexpected spin may occur on the ball, which may hinder the accuracy of putting.

[0012]

As described above, according to the present invention, fine streaks different from those of the other face surfaces are provided in the center region of the face surface. The light reflection state is different from the other areas, and the center area of the face surface stands out and is clearly seen by the player. As a result, the player can easily concentrate his or her consciousness on the center of the face, and can accurately grasp the ball at the center of the face, especially at the center of impact.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a preferred embodiment of the present invention.

FIG. 2 is a perspective view showing how to define a center of gravity and a center region on a face surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head main body 2 Face surface 11,12 Streak marks C Central area G Center of gravity on the face surface (center of impact)

Claims (3)

[Claims] 1. A putter head, wherein fine streaks having directions different from each other are provided in a central region of a face surface and left and right regions adjacent to the region. 2. The putter head according to claim 1, wherein the central area is within a range of 10 mm to 25 mm left and right from a vertical line passing through the center of impact of the face surface. 3. The depth of the streak is 1/10 to 1/10.
The putter head according to claim 1, wherein the putter head has a thickness of 00 mm.