KR101773069B1 - Golf putter head with zirconia ceramic insert - Google Patents

Abstract

In order to make a new putter head which suppresses the problem of corrosion and wear caused in a putter made of a conventional stainless steel as a main material and the inaccuracy of a putter and the property of generating a backspin caused by the conventional putter, The present invention relates to a golf putter having a putter head including a zirconia ceramic as a ball, and has an effect of raising the rotational force of a golf ball to a top-spin form and an error in the deviation of a ball and a directional error even at the time of a miss impact that deviates from the center of the head face of a putter There is a reduction effect.
Compared to the conventional putter head made of stainless steel, the ball surface made of zirconia ceramic does not cause problems of corrosion and abrasion, thereby preventing the inaccuracy of the putter and the back spin.

Description

GOLF PUTTER HEAD WITH ZIRCONIA CERAMIC INSERT WITH ZIRCONIA CERAMIC

The present invention relates to a golf putter and a putter head. The putter head and putter according to the present invention can be configured to include a zirconia ceramic material as at least a part of the ball surface.

Golf is enjoyed by a wide range of players, such as players of different sexes, significantly different ages, and different skill levels. In addition, it has a characteristic that it is unique in the sports world in that it can enjoy golf trips and matches as well as watching games. These factors have, over the last few years, increased, at least in part, across the globe with the increasing availability of golf programs (e.g., golf tournaments, golf news, golf history and / or other golf programs) Many golfers whose golf skills are different due to increased golf popularity try to improve their skills and lower their golf scores. Manufacturers of golf equipment have responded to these demands, and in recent years there have been spectacular changes and improvements in golf equipment.

Among improvements in golf equipment, golf clubs, the sole tool for moving golf balls during play, have been subject to numerous technical research and advances in recent years. For example, recently in the marketplace there have been improvements in putter structures, golf club head structures, shafts, and grips. In addition, various technical advances have been made in an effort to better match the various elements, characteristics, and characteristics of the golf club to the characteristics or characteristics of a particular user's swing. For example, the club fitting technique, ball pitch angle measurement technique, and ball spin rate characteristics are improved.

A golf club is composed of one set of various kinds of golf clubs to be selectively used according to the position and the pitch of the golf ball, the distance from the hole (Hloe), and surrounding conditions. A set of golf clubs consists of a wood drive, a wood spoon, a wood baffy, a wood creek and several iron and putters .

In particular, when a golfer puts a golf ball into a green hole, which is the final objective in a golf game, the golf ball is hit or pushed by a ball surface formed on the club head of the putter. It is very important that the ball is put on the ball with a smooth impact so that the ball surface is not slippery or bouncing too much. Conventionally, a club head is formed by pouring a club head into a mold having a moderately soft and strong tin or copper alloy material and having a putter shape, attaching a thin plate of aluminum, copper or silver on the ball's head surface, As a result, it is impossible to attain the intended purpose of the original as the ball is easily removed during use or the ball surface is deformed, and the ball surface of the head having such a shape does not fit the center of the ball when hit, If the slice is correct, a hook will often occur if the slice is right on the ball.

Particularly, these metal putters advertise the head face as though they have been finished by elaborate milling, but the distance between the shape and the machining pitch is not constant. There is a disadvantage in that the friction of the head face is small and the workpiece is easily worn or abruptly subjected to an external shock. This causes the golf ball surface to come into contact with the head face at the time of putting so that the ball does not roll in the correct direction .

On the other hand, zirconia (zirconium oxide) is a term used throughout zirconium oxide, which is an oxide of zirconium and a white crystal. ZrO2. Molecular weight of 123.22, and melting point of about 2,700 ° C. It is an unusual mineral in monoclinic. High refractive index and high melting point. It has the highest strength among the ceramic materials used in dentistry, and is also used as a material substituting teeth for esthetics. Also, it is resistant to sudden temperature changes and is also used for rapid heating. Zirconia ceramics is the first ceramic to overcome the brittleness which was the biggest defect of ceramics. It is a ceramic material with excellent abrasion resistance, hardness, corrosion resistance, heat expansion coefficient close to cast iron and excellent thermal insulation.

Korean Patent Registration No. 10-0460305 discloses a method of overcoming the drawbacks of metal (usually stainless steel) putter as described above, in which a diamond or ceramic carbide powder is deposited on a golf putter head to form a fine uneven portion. However, there is a problem in that a process of melting diamond or ceramics is required for welding, and the problem is not taken into consideration when the impact is concentrated only on the center of the head face of the head face and the case where the impact is missed.

In order to overcome the disadvantages of the conventional metal putter and the related product, the present invention is characterized in that a concave portion is formed in the club head body of the putter, a zirconia ceramic plate corresponding to the concave portion is inserted into the insert to increase the surface friction, And the uniformity of the elasticity of each part is reduced by thinning the thickness of the ceramics at both ends (toe and heel), so that the putter user is stable Golf putter and putter head which are manufactured so as to maintain the trajectory of the putter with little mistake were developed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a new putter head which suppresses the problem of corrosion and abrasion occurring in a putter using a conventional stainless steel as a main material, and suppresses the inaccuracy of the putter and the backspin caused by the putter.

In order to achieve the above object, the present invention provides a putter head (120) comprising a ceramic insert forming at least a part of a putter head hitting surface (122).

The hitting surface insert is characterized in that the material of the ceramic insert is one selected from the group consisting of alumina (Al ₂ O ₃ ), silicon carbide, silicon nitride, cemet and zirconia ceramics. Or more.

The zirconia ceramics may be yttria (Y ₂ O ₃ ) partially stabilized zirconia ceramics.

And a recess 124 for receiving the ceramic insert in the putter head 120.

The recess 124 may be joined to the ceramic insert using at least one of an adhesive, a welding technique, and one or more mechanical connectors.

The ceramic insert may have a pattern that is regularly processed at a portion exposed to the ball surface 122.

The regularly processed pattern may be one of a horizontal line pattern, a vertical line pattern, a horizontal line and a vertical line pattern, a rhombus pattern, a vertical line and a rhombus net pattern.

The regularly processed pattern may have a pitch of 0.5 to 1.0 mm and a depth of 0.3 to 1.0 mm, which is the interval between the grooves forming the pattern.

The ceramic insert may have a thickness of a center portion exposed on the ball surface 122 and a thickness of both end portions.

The center portion thickness may be 4 to 6 mm, and the both end portion thickness may be 1.8 to 2.5 mm.

The present invention provides a putter head comprising: the putter head; And a shaft engaged with the putter head.

The present invention relates to a process for the production of granules, comprising: a) mixing and granulating a ceramic raw material; b) molding the granulated ceramic into a ceramic insert; c) heat treating the ceramic formed in the ceramic insert shape; d) grinding the heat-treated ceramic; And e) surface machining of the ceramics subjected to the standard grinding.

The heat treatment in the step c) may be a heat treatment at 1700 to 1800 ° C.

The surface machining of step e) may include engraving a regularly machined pattern to increase the frictional force of the ceramic insert.

The present invention creates a recess 124 within the position of the ball 122 of the putter head 120 and the width of the recess 124 extends to at least a portion of the size of the ball 122 of the putter head 120 (124) on the putter head (120); And engaging a ceramic insert received in the recess (124).

The step of engaging the ceramic insert received in the recess 124 may engage the recess 124 with the ceramic insert using at least one of an adhesive, welding technique and one or more mechanical connectors.

According to the present invention as described above, the golf putter including the putter head including the zirconia ceramic as a part of the ball surface has the effect of raising the rotational force of the golf ball to the top spin form, It has the effect of reducing the deviation of the ball and the error of the directionality.

Compared to the conventional putter head made of stainless steel, the ball surface made of zirconia ceramic does not cause problems of corrosion and abrasion, thereby preventing the inaccuracy of the putter and the back spin.

1 is a perspective view of a putter according to the present invention;
Fig. 2 is a sectional view of a central portion of a putter according to the present invention. Fig.
3 is an exploded view of a putter according to the present invention.
FIG. 4 is a view showing a kind of a pattern applied to a putter according to the present invention. FIG.
Fig. 5 is a process diagram of the production of a zirconia ceramic insert used in the present invention. Fig.
Figure 6 is a comparison of impact moments between a conventional steel putter and a putter of the present invention
FIG. 7 is a conceptual diagram of rotation generated at the moment of impact,
Figure 8 shows a comparison of the rotation of a conventional putter placed with a steel putter according to the present invention
Figure 9 is a comparison of distance deviations between a conventional steel putter and a ball putter according to the present invention
10 is an enlarged view of a putter of a putter manufactured as a prototype of the present invention
11 shows the appearance of a putting tester

Hereinafter, the present invention will be described in detail.

The present invention provides a putter head (120) comprising a ceramic insert forming at least a portion of a putter head striking surface (122).

The hitting surface insert is characterized in that the material of the ceramic insert is one selected from the group consisting of alumina (Al ₂ O ₃ ), silicon carbide, silicon nitride, cemet and zirconia ceramics. Or more of the ceramic material.

The zirconia ceramic is characterized by being yttria (Y ₂ O ₃ ) partially stabilized zirconia ceramics.

And a recess 124 for receiving the ceramic insert in the putter head 120.

The recess 124 is characterized in that it is coupled with the ceramic insert using means of at least one of an adhesive, a welding technique and one or more mechanical connectors.

The ceramic insert has a pattern that is regularly processed at a portion exposed to the ball surface 122.

The regularly processed pattern may be one of a horizontal line pattern, a vertical line pattern, a horizontal line and a vertical line pattern, a rhombus pattern, a vertical line and a rhombus net pattern. Preferably, the rhombic netting increases the frictional force and requires less machining.

The regularly processed pattern is characterized by having a pitch of 0.5 to 1.0 mm and a depth of 0.3 to 1.0 mm, which is a distance between grooves forming a pattern. Preferably, the pitch is 0.6 to 0.8 mm and the depth is 0.4 to 0.6 mm.

The ceramic insert is characterized in that the thickness of the center portion exposed on the ball surface 122 and the thickness of both end portions are different from each other.

The center portion thickness is 4 to 6 mm, and the both end portion thickness is 1.8 to 2.5 mm. Preferably, the center portion thickness is 4.8 to 5.2 mm, and both end portions are 1.8 to 2.0 mm. If it is too thin, it will be difficult to work. If it is too thick, it will not be economical and there will be a limit to the thickness of the center of the putter.

In another aspect, the present invention provides a putter head comprising: the putter head; And a shaft engaged with the putter head.

In another aspect, the present invention provides a process for preparing a ceramic material, comprising: a) mixing and granulating a ceramic raw material; b) molding the granulated ceramic into a ceramic insert; c) heat treating the ceramic formed in the ceramic insert shape; d) grinding the heat-treated ceramic; And e) surface machining of the ceramics subjected to the standard grinding.

The heat treatment in the step c) is characterized by heat treatment at 1700 to 1800 ° C.

The surface machining of step e) comprises engraving a regularly machined pattern to increase the frictional force of the ceramic insert. Preferably, the rhombic netting increases the frictional force and requires less machining.

In another aspect of the present invention, a concave portion 124 is formed inside the position of the ball surface 122 of the putter head 120, and the width of the concave portion 124 is larger than the width of the ball surface 122 of the putter head 120. [ (124) in a putter head (120) that extends at least a portion of the size of the putter head (120). And engaging a ceramic insert received in the recess (124).

The step of engaging the ceramic insert received in the recess 124 is characterized by engaging the recess 124 with the ceramic insert using at least one of an adhesive, welding technique and one or more mechanical connectors .

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are merely illustrative of the present invention and that the scope of the present invention is not construed as being limited by these embodiments.

Example 1: Structure of the present invention and preparation of zirconium ceramic insert

A. Structure of the Present Putter

1 shows an exemplary golf putter 100 according to the present invention. The golf putter includes a putter head 120 and a shaft 110, and a putter surface 120 is present on the putter head 120. The present invention is a zirconia ceramic insert applied to part or all of the ball surface 122.

On the inside of the putter head 120 where the ball surface 122 is located, a concave portion 124 recessed into the body is formed (see FIG. 3). The recess 124 may be part or all of the size of the ball 122 in the putter head 120. The inserts exposed to the ball surface 122 are formed by ceramic inserts in the recesses 124 with the ceramic plates joined together using at least one of an adhesive, a welding technique and one or more mechanical connectors, Zirconia ceramic is used as an insert material. More preferably Y ₂ O ₃ (yttria) partially stabilized zirconia ceramics is used as the insert material.

The inserts exposed to the putter 100 hitting surface 122 of the present invention are different in thickness of the center portion 126 and the thickness of the both ends 128 and the toe and heel, Thereby making the end portion 128 thin. The purpose of this is to reduce the deviation of the pitch of the putter by reducing the repulsive force deviation, and when the golf ball is put into the center portion 126 of the ball surface 122 under a certain experimental condition, When the golf ball is put into the position (128), the difference in the distance of the ball is made to be equal to or less than 10% of the larger value. Preferably, the thickness of the zirconium ceramic insert corresponding to the center portion 126 is 4.5 to 5.5 mm, and the thickness of the zirconium ceramic insert corresponding to both ends 128 is 1.5 to 2.5 mm. Considering the width of the center portion 126 of the existing putter 100, it is difficult to exceed 5.5 mm, and it is difficult to process the cutter to 1.5 mm or less.

The center portion of the putter head 120 may have an open structure as shown in FIG. 3, and the concave portions 124 having a deep depth may be formed at the center portion of the putter head 120. In this case, Fig. 2 is a sectional view taken along the line AA in Fig. 1 and shows such a structure. The difference in thickness of the zirconium ceramic insert makes it possible to reduce the deviation of the ball and the deviation of the directionality of the ball even in the case of a miss impact that deviates from the center of the ball when putting, thereby reducing the concern about the miss shot (see FIG. The resilience of zirconium ceramics and steel is similar, with roughly 190 to 200 GPa values. However, comparing the specific gravity, usually the proportion of the SUS304 one of the steel material used for the conventional putter is 7.93 g / cm ^3, compared to zirconia ceramic is 6.1 g / cm indicated a ³ value zirconia ceramic side, the smaller the weight on the same volume . Thus, when applying the zirconia ceramic insert of the present invention to an existing putter structure, both ends 128 occupy a greater proportion of steel material and center portion 126 occupies a lesser proportion of steel material, The mass of the end portion becomes larger. Therefore, when the golf ball is hit at both ends, it gives more impact to the golf ball, which leads to more distance.

The ball surface 122 of the putter 100 manufactured as a prototype of the present invention can be seen in an enlarged view of FIG. 10, and a concrete view of the ball surface 122 forming a part of the putter head 120 can be confirmed . The ball surface 122 may be part of one side of the putter head body or may be enlarged as a whole. The ball surface 122 is formed by inserting the zirconia ceramic into the concave portion 124 as the insert material, and inserts a dense and uniform pattern to increase the surface friction. If the surface friction is high, it is possible to prevent slipping of the golf ball during impact. Fig. 4 shows the pattern type of a zirconia ceramic insert ball surface that can be machined. a) a horizontal line pattern, b) a vertical line pattern, c) a horizontal line and a vertical line pattern, d) a rhombus pattern, e) a vertical line and rhombus net pattern 1, f) a vertical line and rhombus net pattern 2, g) (122), which is composed of seven kinds of pattern inserts, were tested and tested. All the patterns had the effect of increasing the friction, but the mixed pattern including the rhombic net pattern or the rhombic net pattern was excellent in frictional force.

B. Preparation of Zirconium Ceramic Inserts for Putter of the Invention

The zirconia ceramic insert inserted into the recess 124 of the putter head 120 is manufactured through the same process as shown in FIG.

The first step is to mix the ceramic raw materials. This process involves granulating the raw material (raw material) into a ball mill and mixing it in the spray dryer for the next process. The next step is the Forming process to create the desired shape. The third step is heat treatment at 1700 to 1800 ° C, which is the process of sintering. The fourth step is the grinding process, which is performed by various types of grinding machines such as CNC machines. The fifth step is the surface machining process and finishes the necessary surface machining with the Sanding machine, Lapping machine, Polishing machine and Barrel Finishing machine. In this process, the pattern is engraved on the zirconia ceramic insert. In the final sixth step, the zirconia ceramic insert thus made is joined and assembled to the putter recess using at least one of an adhesive, a welding technique and one or more mechanical connectors to complete the golf putter head.

The putter with zirconia ceramic is excellent in abrasion resistance and corrosion resistance, so as shown in FIG. 6, the putter surface acting at the moment of impact is smooth, so that the putter user can roll the golf ball in a desired direction. 6A shows a conventional metal putter case, A-1 shows an enlarged view of a putter surface of a conventional metal putter, and A-2 shows a putter deflected due to an irregular hit face. 6B is a view of a putter in which a zirconia ceramic according to the present invention is inserted on a ball, B-1 is an enlarged view of a ball in the present invention, B-2 is a putter in a desired direction, It is a figure made.

Example 2 Comparative Experiment of Existing Putter and Present Putter

A. Comparison of Stainless Steel Putter Ball and Zirconia Ceramic Ball

As a comparative putter head, a comparative evaluation was conducted using a pin type putter head (stainless steel SUS 304) having a loft angle of 4 degrees. In the putter head according to the present invention, the ball surface is made of zirconium ceramic (see Fig. 10). A putter head was attached to this putter head to make a putter.

The equipment that performs the putter test multiple times is the putter tester, and the concrete view of the putter tester is shown in Fig. Using a putter tester that performs the test automatically, the putter head was moved 15cm behind the golf ball and tested 30 times with the same swing applying putting impact. The ball rolling on the green image was photographed with a high-speed camera to measure the spin amount of the ball. Also, the ball was slightly raised by the loft angle immediately after the impact, and then landed and rolled. The experiment was performed by measuring the rolling distance of the golf ball, the initial back spin amount, and the forward spin amount immediately after landing. The experimental results are shown in Table 1.

Table 1 Comparison between a stainless steel putter head and the present invention putter head [

As shown in Table 1 above, it can be seen that the present invention putter having a central portion of the ball surface made of zirconium ceramic has few initial backspin, and the number of forward spins after landing is good, and the rolling distance is extended .

The putter head generally has a loft angle of about 2 to 5 degrees. Immediately after the impact, a back spin is applied to the golf ball or a sliding motion is performed. Such a movement pattern can be known by photographing a high-speed camera. The ability to control the rolling motion of the ball is exacerbated by exercise.

The rotation pattern of the ball is shown in detail in FIG. 8A shows a golf ball put using a zirconia ceramic putter, and B shows a golf ball put using a stainless steel putter. The first left is the image just before the impact, the second after the impact, the third after the impact, the fourth after the impact, and the fourth after the impact. In the case of a metal putter, it can be seen that a backspin is applied at the time of impact, and that the backspin that is stuck at this time is released only after 30 cm. In contrast, the putter of the present invention has a weak backspin, and it can be seen that the backspin that is caught is also loosened soon before the point of 15 cm and turned into the forward spin (top spin).

Specifically, the same impact as shown in FIG. 7 is obtained. The red ball shown in Fig. 7 shows a high frictional force, and when the ball surface is uniform due to wear and corrosion, the back spin is minimized and the forward spin (top spin) is easily formed by the impact.

B. Comparison of the impact position of stainless steel putter ball and zirconia ceramic balls

The same test was performed to determine what results would be obtained if the thickness difference between the center portion (center) and both ends (toe and heel) of the putter ball surface according to the present invention were different.

The equipment that performs the putter test multiple times is the putter tester, and the concrete view of the putting tester is shown in Fig. Using the putter tester that performs the test automatically, move the putter head 15cm behind the golf ball, and then apply the same swing that applies the putting impact to the center (center) and both ends (toe and heel) of the ball The test was carried out. The ball rolling on the green image was photographed with a high-speed camera to measure the spin amount of the ball. Also, the ball was slightly raised by the loft angle immediately after the impact, and then landed and rolled. The experiment was performed by measuring the rolling distance of the golf ball, the initial back spin amount, and the forward spin amount immediately after landing. The experimental results are shown in Table 2.

Table 2 Comparison between the Stainless Steel Putter Head and the Present Putter Head according to Impact Position

As shown in Table 2 above, the present inventive putter having the ball surface made of zirconium ceramic has a smaller variation in distance of rolling according to the impact position than the conventional stainless steel head, .

The difference in the impact result between the center portion and the both ends (toe and heel) is small because the putter of the present invention has the center portion of 5 mm thick and the both ends (toe and heel) of 2 mm, This is because the difference is small.

Specifically, FIG. 9 is shown. 9A shows a golf ball put with a center and both ends (a toe and a heel) of a zirconia ceramic putter ball, and B) shows the center and both ends of a putter surface of a stainless steel putter A toe and a heel). It can be understood that the putter of the present invention has little or no difference with respect to whether or not the putter according to the present invention is fit to the center.

Having described specific portions of the present invention in detail, it will be apparent to those skilled in the art that this specific description is only a preferred embodiment and that the scope of the present invention is not limited thereby. It will be obvious. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

100: Golf Putter
110: shaft
120: Putter head
122:
124:
126: insert center
128: Both ends of the insert
200: Golf ball

Claims (16)

delete delete delete delete delete delete delete delete delete delete delete a) granulating yttria (Y ₂ O ₃ ) partially stabilized zirconia ceramic raw material by mixing;
b) forming the granulated yttria (Y ₂ O ₃ ) partially stabilized zirconia ceramic in the form of a ceramic insert, wherein the ceramic insert has a thickness of the center portion exposed on the ball surface (122) Wherein the center portion thickness is 4 to 6 mm and the both end portion thickness is 1.8 to 2.5 mm;
c) heat-treating the ceramics formed into the ceramic insert shape,
Heat treatment at 1700 to 1800 占 폚;
d) grinding the heat-treated ceramic; And
e) grinding the above-mentioned ceramics,
A step of machining a regularly machined pattern to increase the frictional force of the ceramic insert; delete delete delete delete

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