JP2001137399A - Stone head of putter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stone putter head that retains stable quality without being internally affected by temperature fluctuations outdoors and long use. SOLUTION: A stone putter head is completed, after selecting stone whose Rockwell hardness is 6 or less and measuring its specific gravity, by cutting it into a main body 10 with a water cutter, drawing the profile of a putter face 11 thereon, pasting a shape plate of the same size as the face 11 to the plane of a master body and then drawing the profile of the face 11, abrading up to the external edge line of the profile of the face 11 from the exterior, abrading details until it matches a solid putter as a model, abrading a recess 12 on the face 11, fitting a metal balance weight 20, to the four sides of which an adhesive is applied, thereinto, and in the end pasting a soft face plate 30 to the end of the opening of the recess 12 into which the metal balance weight 20 is fitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a putter for a golf club, and more particularly to a golf club putter utilizing a physical property having a higher stability than that of a metal material. The present invention relates to a golf putter head made of stone which has achieved a stable quality in use.

[0002]

2. Description of the Related Art Golf clubs include wood, iron, and putters, of which putters are clubs designed to pad balls into holes. Thus, most of the common putters are used for short-distance pads on the green and all are used for the last one, two or three strokes of each hole. To put the golf ball in the direction and distance you want to advance, smoothly and accurately enter the hole, and to overcome the limitation of the volume and weight of the putter head, the conventional putter uses a balance weight to adjust the position of the center of gravity of the head. By changing the distance and the distance from the center of gravity of the head to the face by multiplying the LD value of the head (the distance from the position of the center of gravity of the head to the position of the club axis), the direction and distance of the pad become more accurate and stable. I am trying to become. For this reason, in a general putter structure, a metal material having a relatively low specific gravity is used for a main portion of the head, and a metal having a relatively heavy specific gravity is used for a balance weight portion.

[0003]

As described above, the structure of the conventional putter head has the purpose of changing the arrangement of the center of gravity by using two kinds of metal materials having different specific gravities. For this reason, such putter heads can theoretically obtain a high LD value, but do not take into account that the expansion coefficients of two metal materials having different specific gravities are also greatly different. All between the conventional balance weight and the putter head main body needs to be tied up (fitting with size limitation, and usually a fixed interference is left between them after fitting). After the fitting, it is directly connected to the internal structure of the head main body and tightly integrated without leaving any gap between them, so that when a large temperature change occurs, the expansion coefficients of the head main body and the input balance weight are different from each other As a result, various physical states such as expansion and contraction occur. Since both increase and decrease the volume such as expansion or contraction at the same time, various types of unexpected destruction in the internal structure of the head, such as distortion or cracking of the metal bonding structure,
Phenomena such as residual stress occur, and these phenomena not only affect the stability of the center of gravity of the head, but also change the LD value, thereby losing the accuracy and quality of the impact originally possessed by the head. It will be.

[0004] In order to solve the above-mentioned problems, the present invention utilizes the characteristic that a stone material has a relatively low coefficient of thermal expansion and thermal conductivity. Effectively isolating temperature from being conducted to the balance weight, keeping its internal structure stable, overcoming various stress ruptures caused by temperature changes,
An object of the present invention is to provide a stone golf putter head in which the overall structure and quality of the putter head are more stabilized.

[0005]

First, a stone having a Rockwell hardness value of 6 or less is selected, and the specific gravity of the stone is measured and recorded. The seed body is cut out, the contour of the outer edge of the putter face is drawn on the seed body, an outer plate having the same size as the face of the putter head is attached on the plane of the seed body, and the outer plate is used. The outline of the face is drawn on the seed body, and the first polishing and molding starts polishing from the outside of the line that outlines the face, polishes to the outer edge line, and the second time, a three-dimensional putter is used as a reference model. Polish the details as necessary, grind it until its appearance completely matches the model putter, and grind the concave groove inwardly recessed on the face of the putter, followed by a suitable metal balance weight Choose the metal balance way An adhesive is applied to the outer periphery of the four circumferences so that when the metal balance weight is fitted in the concave groove of the face, it is prevented from coming off. It is characterized in that the board is attached and completed. The product thus obtained has an extremely stable internal structure, and its LD
The value does not change due to the temperature change of the external environment.
For this reason, it is possible to overcome the disadvantage of losing accuracy due to a change in the internal structure caused by using the conventional putter for a long time.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a stone golf putter head according to the present invention will be described below with reference to the drawings. First, a stone having a Rockwell hardness value of 6 or less is selected, the specific gravity of the stone is measured and recorded, and when the product is completed, this is used as a reference value of the metal balance weight (each stone has an internal structure depending on the state of formation. Since the sparse density is different, and therefore, the specific gravity values are all different, it is necessary to record them.) Next, the stone is cut into roughly the original seeds with a water cutter, and the volume of each is cut into 1
Increase from 5/00 to 10/100. Then, the contour of the outer edge of the putter face is drawn on the seed body, an outer plate of the same size as the face of the putter is stuck on the flat surface of the seed body, and the face is formed on the seed body using the outer plate. Draw an outline.

[0007] In the first polishing and shaping, polishing may be started from the outside of the line delineating the face and polished to the outer edge line. In the second round, the details are polished using a three-dimensional standard putter as a reference model, and polished until the appearance completely matches the model putter. Polish the inwardly concave groove on the face of the putter, and then select an appropriate metal balance weight (the value obtained by adding the specific gravity of the stone in the initial stage to the specific gravity of the balance weight is the putter head). An adhesive is applied to the outer periphery of the metal balance weight on four sides so that the metal balance weight does not come off when the metal balance weight is fitted in the concave groove of the face. Finally, a soft face plate is attached to the end face of the opening of the concave groove in which the metal balance weight is fitted, and the process is completed.

The main body 10 of the golf putter head completed according to the above-described manufacturing method is made by polishing a stone material several times, and has a face 11 provided with a concave groove 12 facing inward, and the concave groove 12 is formed of a metal balance weight. 20 may be fitted, and a soft face plate 30 may be attached on the opening end surface of the concave groove 12 of the metal field balance weight 20.

As shown in FIG. 2, the main body 10 is formed by polishing a stone material.
Fits into the main body 10 by binding. When there is a large change in the temperature of the outside world, the main body 10 is made of stone, so that the temperature change of the outside world is cut off by the main body 10 due to its extremely low thermal conductivity. A constant temperature can be maintained, and the situation where the volume increases or decreases due to the rise and fall of the temperature does not occur.
Furthermore, since the stone has an extremely low coefficient of thermal expansion, the volume change of the stone is very small even in an environment where the temperature changes rapidly, and the metal balance weight 20 fitted to the main body 10 is small. The metal structure is not destroyed at all, so that the center of gravity of the putter head does not shift.

[0010]

According to the golf putter head made of stone according to the present invention, stone is used for the putter head, and the characteristic that the stone originally has such a relatively low coefficient of thermal expansion and heat conduction is used to reduce the temperature of the external environment. By effectively isolating the conduction to the internal balance weight, maintaining the stability of its internal structure, and overcoming various stress fractures due to temperature changes,
It is possible to provide a golf putter head made of stone, in which the overall structure and quality of the putter head are more stabilized. In addition, the product manufactured by the method of the present invention has an extremely stable internal structure, and its LD value does not change due to the temperature change of the external environment. ,
There is no loss of accuracy.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a manufacturing process of an embodiment of a stone golf putter head according to the present invention.

FIG. 2 is a lateral cross-sectional view of an embodiment of a stone golf putter head according to the present invention.

[Explanation of symbols]

 Reference Signs List 10 main body 11 face 12 concave groove 20 metal balance weight 30 face plate

Claims (3)

[Claims] 1. A stone having a Rockwell hardness value of 6 or less is selected, and the specific gravity of the stone is measured and recorded. Divide, outline the outer edge of the putter face on the seed body, paste an outer plate of the same size as the putter face on the flat surface of the seed body, and further use the outer plate to apply a face on the seed body. Draw the outline, the first polishing process molding, starting from the outside of the line that outlines the face, polishing to the outer edge outline above, then polishing the details using a three-dimensional putter as a reference model, the appearance shape is model Polished until it completely matches the putter to be formed, polished and formed an inwardly concave groove on the putter face, and then selected an appropriate metal balance weight, adhesive So that it does not come off when the metal balance weight is fitted in the concave groove of the face. Finally, a soft face plate is attached to the end face of the opening of the concave groove in which the metal balance weight is fitted. A golf putter head made of stone characterized by having a constitution. 2. The volume of the seed body is 5/100 of the finished product.
The golf putter head made of stone according to claim 1, wherein the pitch is increased by 10/100. 3. The main body is formed by polishing a stone material several times, providing a concave groove on the face, fitting the metal balance weight into the concave groove, and further fitting the concave groove opening end face of the metal balance weight. The stone putter head according to claim 1, wherein a soft face plate is attached.