WO2014084563A1

WO2014084563A1 - Golf shaft having convex portion

Info

Publication number: WO2014084563A1
Application number: PCT/KR2013/010767
Authority: WO
Inventors: 이재웅
Original assignee: (주)델타인더스트리
Priority date: 2012-11-29
Filing date: 2013-11-26
Publication date: 2014-06-05

Abstract

The present invention relates to a golf shaft having a convex portion including: a lower end portion that is the lower side end portion in which a head is coupled thereto; and an upper end portion that is the upper side end portion of a grip portion area which is gripped by the hands of a user. The present invention further includes: a main body that gradually decreases in outer diameter from the upper end portion to the lower end portion; a first convex portion that overlaps with the main body, starting from a first lower end portion, so as to have a gradually increasing outer diameter and then a decreasing outer diameter from the lower end portion to the upper end portion; and a second convex portion that overlaps with the main body, starting from a second lower end portion between the first lower end portion of the first convex portion and the area in which the outer diameter reaches the maximum, so as to have a gradually increasing outer diameter and then a decreasing outer diameter. According to the present invention, the torsion of the golf shaft can be reduced, and the orientation, shock absorption, and the like thereof can be improved.

Description

Golf shaft with convex

The present invention relates to a golf shaft having a convex portion, and more particularly to a golf shaft having a convex portion having an improved structure of the lower region of the golf shaft.

In general, when hitting a golf ball using a golf shaft, the club shaft is subjected to a load or an impact due to the impact of the golf ball to the head hitting the golf ball. As a result, several stresses are generated on the golf shaft. Among these, the most influential characteristics of the golf shaft are the bending stress caused by the distance between the striking point of the head and the gripping point of the golf shaft, and the distance between the striking point of the head and the connection of the golf shaft. Torsion stress. In addition, the impact at the moment of hitting the golf ball with the golf shaft is preferably absorbed in the golf shaft without being transmitted to the user.

Here, if the rigidity of the golf shaft is too low, the deformation is excessive when hitting the golf ball can not be made precisely, if the elasticity is too low or too high rigidity, there is a problem that the shock is excessively transmitted to the user's body, It is also important that the golf shaft has adequate rigidity and elasticity.

In consideration of these points, the current golf shaft is mainly used a metal golf shaft made of a metal alloy such as steel alloy, aluminum alloy, and graphite golf shaft made of carbon fiber fabric reinforced with epoxy resin.

Such graphite golf shafts are more advantageous to shock absorption than forced golf shafts, but research is being conducted to improve not only shock absorption but also a feeling of hitting and direction.

The related art related to this research is disclosed in Japanese Patent Laid-Open No. 11-164919 and Korean Patent Publication No. 10-0253746, respectively. Although the Japanese patent publication has the ridges of the same material as the main body, the dimensions of the ridges are not described in more detail. There is a concern.

An object of the present invention is to provide a golf shaft having a convex portion capable of improving the torsion, directionality, shock absorption, and the like of the golf shaft.

In addition, another object of the present invention is to provide a golf shaft having a convex portion that more specifically presents the manufacturing specifications of the graphite golf shaft.

Further, another object of the present invention is to provide a golf shaft having a convex portion that is easy to manufacture.

An object of the present invention has a lower end that is a lower end to which the head is coupled, an upper end that is an upper end of a grip area where the user holds the hand, and a main body whose outer diameter gradually decreases from the upper end to the lower end, and the lower end. A first convex portion starting at the first lower portion and overlapping with the main body while the outer diameter is gradually increased and then the outer diameter is decreased; And a second convex portion starting at a second lower end portion between the first lower end portion of the first convex portion and a region having an outer diameter maximum, and overlapping with the main body and gradually increasing in outer diameter and decreasing in outer diameter. Is achieved by a golf shaft having a convex portion.

In addition, the first convex portion includes a first convex center whose outer diameter is gradually increased at the first lower end and a maximum outer diameter at the first lower end portion, and a first upper end which is gradually smaller in outer diameter at the first convex center to become the same outer diameter as the main body, The second convex portion has a larger outer diameter at the second lower end portion and a second convex center provided at a position corresponding to the first convex center at which the outer diameter becomes the maximum, and the outer diameter is gradually reduced at the second convex center, thereby providing a first upper end portion. It is preferable to include a second upper end portion provided at a position corresponding to.

In addition, the distance from the second lower end to the second convex center and the distance from the second convex center to the second upper end are preferably the same.

In addition, the ratio of the weight (A) of the sum of the first convex portion and the second convex portion and the weight (B) of the main body is A: B = 1: 4, the error range of the weight ratio is 5 to 10% It is preferable to include.

In addition, the golf shaft is made of graphite, the material forming the first convex portion or the second convex portion is preferably woven with a string and a blade.

In addition, when the main body is for the wedge, it is preferable that the distance from the first lower end to the first convex center or the second convex center is in the range of 300 mm ± 10 mm.

In addition, the first lower end portion, preferably starting from the lower end, or comprises a space between the center point of the lower end and the upper end spaced from the lower end.

According to the present invention, it is possible to provide a golf shaft having a convex portion capable of improving the torsion, directivity, shock absorbency, and the like of the golf shaft.

In addition, it is possible to provide a golf shaft having a convex portion that presents a manufacturing specification of a golf shaft more specifically, and which is easy to manufacture.

1 is a cross-sectional view of a golf shaft having a convex portion according to an embodiment of the present invention,

2 is a schematic view for explaining FIG. 1;

3 is a developed view of a film for forming a convex portion;

4 is a cross-sectional view of a golf shaft showing another embodiment of the present invention,

5 is a partially enlarged view of FIG. 4.

A golf shaft 100 having a convex portion (hereinafter, referred to as a “golf shaft”) according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.

1 is a cross-sectional view of a golf shaft having a convex portion according to an embodiment of the present invention, Figure 2 is a schematic diagram for explaining Figure 1, Figure 3 is an exploded view of the film for forming the convex portion, Figure 4 is a present invention 4 is a cross-sectional view of a golf shaft showing another embodiment of FIG. 5 is a partially enlarged view of FIG. 4.

As shown in FIG. 1, the golf shaft 100 includes a lower end portion 115, which is a lower end portion at which a head (not shown) hitting a golf ball is coupled, and a grip portion (not shown) area in which a user holds a hand. The upper end portion 113 having an upper end and the outer diameter becomes smaller gradually from the upper end 113 to the lower end 115, and the outer diameter overlapping the main body 110 while going from the lower end 115 to the upper end 113 The first convex portion 133, which is gradually larger and smaller in outer diameter, overlaps with the first convex portion 133 starting between a region where the outer diameter of the lower end 115 and the first convex portion 133 becomes maximum. It has a second convex portion 135 in which the outer diameter gradually increases and the outer diameter decreases.

The golf shaft 100 is coupled to the lower head 115, the metal head not shown hitting the golf ball, and the handle cover (not shown) is coupled to the upper end 113 so that the user can easily grip, and finally various A golf club of the type is made and this process is known and is not an essential part of the present invention, so a detailed description thereof is omitted.

It is preferable that the main body 110 contains graphite, not metal, and the outer diameter of the main body 110 changes linearly or linearly. Although the main body 110 preferably has the same thickness as a whole, the portion to which the head is coupled is more preferably thicker than other portions. In addition, since the main body 110 is the same as a normal golf shaft, a detailed description thereof will be omitted below.

Here, the first convex portion 133 is the first convex center (137a) and the first convex center (the outer diameter becomes larger as the outer diameter increases as the upper end 113 from the lower end 115 or the first lower end 133a becomes larger) A first upper end portion 139a having a smaller outer diameter at 137a is provided.

In addition, the second convex portion 135 corresponds to the first convex center 137a having a larger outer diameter at the second lower end portion 135a between the lower end portion 115 and the first convex center 137a to maximize the outer diameter. The second convex center 137b formed at the position and the second convex center 137b have a second outer end portion 139b provided at a position corresponding to the first upper end portion 139a.

That is, as shown in the partial enlarged view of FIG. 1, the lower end 115, the first lower end 133a and the second lower end 135a start at the same position in the longitudinal direction of the main body 110. Similarly, the first convex center 137a and the second convex center 137b are also formed at the same position in the longitudinal direction of the main body 110, and the first upper end 139a and the second upper end 139b are also formed of the main body 110. It is coupled to the body 110 at the same position in the longitudinal direction.

Accordingly, it is a feature of the present invention that the convex portion 130 having a convex shape is provided at the lower end of the main body 110 by the first convex portion 133 and the second convex portion 135. Each convex center 137 of the first convex portion 133 and the second convex portion 135 is formed at the same position in the longitudinal direction of the main body 110.

For this feature, referring to Figure 2 will be described a specific embodiment of the golf shaft 100 according to an embodiment of the present invention.

For convenience, the case where the golf shaft 100 is wedge will be described. The outer diameter of the upper end 113 of the main body 110 is 15.9 mm, the outer diameter of the lower end 115 is 9.4 mm, and the length of the main body 110 (see 'L' in FIG. 2) is 870 mm. The distance from the lower end 115 to the convex center 137 which is the first convex center 137a to the second convex center 137b (see “C1” in FIG. 2) is preferably 300 ± 10 mm. In addition, the length (see 'X2' in FIG. 2) along the longitudinal direction of the main body 110 of the second convex portion 135 is preferably 350 ± 10 mm. In addition, the outer diameter of the convex center 137 is shown as 'Db', and the outer diameter of the main body 110 at a position corresponding to the convex center 137 is shown as 'Da', respectively. In addition, it is preferable that the weight ratio of the weight of the two convex portions 130 and the main body 110 is 1: 4, and the error range of the weight ratio is preferably within 5 to 10%. This error range may be variously changed according to the type of golf club, the weight of the head, the length of the golf shaft and the like.

On the other hand, when the golf shaft 100 is a putter, the total length is 810 mm, and the distance from the lower end 115 to the convex center 137 is preferably 200 ± 10 mm. The putter is formed closer to the bottom 115 than the additional wedge of weight because the overall distance is shorter and the swing speed is much slower than the wedge.

If it is more than the above-described numerical range, the appearance is not good, and if it is less than the numerical range, the effect described later is somewhat inferior.

In addition, the process of manufacturing the convex portion 130 according to the present invention will be described with reference to FIG. 3.

The material forming the first convex portion 133 and the second convex portion 135 according to the present invention is cut into the first triangular film 153 and the second triangular film 155, respectively, as shown in FIG. It overlaps the main body 110.

The first triangular film 153 is provided with a reference number '153a' to form a first lower end portion 133a, a reference number '153b' is provided to form a first convex center 137a, and a first upper end portion 139a. Reference numeral 153c is provided.

Similarly, the second triangular film 155 corresponds to the second lower end 135a and the reference numeral '155a' corresponds to the second convex center 137b and the reference numeral '155b' corresponds to the second upper end portion 139b. And reference numerals 155c are provided respectively.

The triangular film 150 is laminated on the main body 110 to form the convex portion 130. Each triangular film 150 is preferably laminated on the body 110 in several layers. In addition, in the weaving method of the triangular film 150 forming the convex portion 130, it is preferable that the string and the blade is woven. This weaving method can improve the strength against torsion described later.

According to the invention it can be seen that the user is improved in the torsion in the process of hitting the golf ball with the golf shaft 100. Since the first convex portion 133 and the second convex portion 135 are formed, it can be more clearly seen when comparing the torque amount with the conventional graphite golf shaft. That is, when the golf shaft is formed of only the body 110 as in the related art, the torque amount is about 3 to 4 °, and when the golf shaft has the first convex portion 133 and the second convex portion 135 according to the present invention, the torque amount is about. Experiment shows that it is 2 °. That is, in view of the fact that the torque amount of a conventional steel golf shaft is about 1.5 °, it can be seen that the torsion of the golf shaft 100 according to the present invention is much improved as compared to the conventional golf shaft having only the main body.

Since the first convex portion 133 is formed starting from the bottom portion 115, unlike the prior arts, it is possible to preemptively prevent torsion, impact, and the like transmitted from the head, and this effect gradually increases toward the upper side of the convex portion 130. It has an increased effect. Compared to the prior art in which the convex portion 130 does not start at the lower portion 115, it can be seen that the present invention has a more advantageous structure such as torsion, shock absorption, and the like.

This less twisting may be due to the fact that the material forming the convex portion 130 is further included, as well as the way in which the triangular film 150 as the material is woven with a string and a blade. In this sense, the string and the blade is more preferably woven in a mutually orthogonal manner so as to overlap the body 110 in a direction of ± 45 degrees with respect to the longitudinal direction of the body 110, respectively. Due to the structure of the string and the blade line, the path of absorbing the shock transmitted to the golf shaft 100 may be made along the string and the blade line, so that the impact absorption path may be increased and distributed in various directions at the same time.

Golf shaft 100 according to the present invention can absorb the impact generated while hitting the golf ball in the first convex portion 133 and the second convex portion 135 in addition to the body 110 made of graphite. Shock and vibration transmitted to the user's hand at the weight and volume concentrated in the first convex portion 133 and the second convex portion 135 may be alleviated or absorbed. The vibration or shock can be absorbed so that the user can make a more stable hitting and feel an improved hitting feeling. At the same time, a small amount of torque can improve the golf ball's directivity.

And, the center of gravity of the golf shaft 100 of the present invention is the weight of the weight generated by the body 110 and the weight of the weight generated by the first convex portion 133 and the second convex portion 135 Addition of dog weights may occur. These two weights are due to the weight of the weight generated by the head coupled to the main body 110 and the weight of the weight generated by the first convex portion 133 and the second convex portion 135 to swing the golf ball when swinging. The contact time can last long. That is, after hitting an additional golf ball of one weight can hit another golf ball of a different weight with a time difference can improve the time to contact the golf ball can also improve the distance.

In addition, the head portion of the user's arm in the process of hitting the golf ball because the user is formed because the two additional weight and the head of the plurality of additional weight of the golf shaft 100 is coupled to the bottom 115 area Tends to be much further away from Because of this tendency, it is possible to easily hit a golf ball, so that the golf ball does not roll away from the place where it is, and in particular, such as wedges, it is also possible to easily take a spin using this property.

The process of manufacturing the golf shaft 100 having such a configuration will be described in detail with reference to FIGS. 1 and 3 as follows.

First, a release agent or the like is applied onto a mandrel using a mandrel not shown, and then a carbon material is laminated to form a graphite body 110.

Then, the first convex portion 133 is first stacked on the main body 110 using the material cut into the shape of the first triangular film 153 and the second triangular film 155 illustrated in FIG. The convex portion 135 is stacked on the first convex portion 133.

Here, the stacking order of the first convex portion 133 and the second convex portion 135 may be zigzag. That is, after laminating the first triangular film 153 for the first convex portion 133, the second triangular film 155 for the second convex portion 135 may be laminated, and the laminating operation may be repeated.

Thus, according to the present invention, it is possible to provide a golf shaft having a convex portion capable of improving the torsion, directionality, shock absorbency, and the like of the golf shaft. In addition, it is possible to provide a golf shaft having a convex portion that presents a manufacturing specification of a golf shaft more specifically, and which is easy to manufacture.

Second Embodiment

In addition, the golf shaft 200 according to another embodiment of the present invention is shown in Figs.

In the golf shaft 200 according to the present embodiment, the first lower end portion 233a, which is a starting point of the first convex portion 233, is spaced apart from the lower end portion 215 by a predetermined distance, unlike in the above-described embodiment (FIG. 4). "X"). This distance “X” can be changed in various ways depending on the type of golf club and the weight of the head.

The spacing is somewhat different, but the first convex center 238a and the second convex center 237b are located at a half point from the lower end 215 to the upper end 213 of the length of the

entire golf shaft

200, or 1. It is preferable that the center of gravity is positioned at the lower side of the golf shaft 200 as it is disposed at a position moved to the lower end portion 215 by about 50 to 200 mm from the / 2 point.

In addition, in the present embodiment, as shown in FIG. 5, the diameters of the first upper end portion 239a and the second upper end portion 239b (see “D actual” in FIG. 5) are virtual according to the original inclination of the main body 210. It is preferred to be smaller than the diameter in the straight line (see “D assume” in FIG. 5). This small diameter can easily induce the bending of the lower area of the golf shaft in the process of swinging and hitting the golf ball so that the user can more effectively utilize the weight of the

convex portions

233 and 235, as described above. Can be further increased.

In the present embodiment, the same configuration as the above-described embodiment, except for the first digit of the three-digit reference number, the same configuration except for the first two digits in the following will not be described in detail, and the description of the above-described configuration and the symbols described below Same as in In addition, since the method of forming the first convex portion 233 and the second convex portion 235 is the same as in FIG. 3, the description thereof will be omitted below. In the diameter of the main body 210 portion (“D actual” in FIG. 5) where the diameters at the first upper end portion 239a and the second upper end portion 239b are smaller (“D actual” in FIG. 5), the film, such as a film, partially overlaps with another portion. It can form by reducing the number of plies (the number of overlapping and overlapping films).

Herein, while the embodiments of the present invention have been illustrated and described, it will be appreciated by those skilled in the art that the present invention can be modified without departing from the spirit or spirit of the present invention. . It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

Claims

A main body having a lower end of the lower end to which the head is coupled, an upper end of the upper end of the grip area that the user holds, and an outer diameter gradually decreasing from the upper end to the lower end;

A first convex portion starting at the first lower portion and overlapping with the main body while going from the lower portion to the upper portion, the outer diameter of the lower portion gradually increasing and then decreasing in outer diameter;

And a second convex portion starting at a second lower end portion between the first lower end portion of the first convex portion and a region having an outer diameter maximum, and overlapping with the main body and gradually increasing in outer diameter and decreasing in outer diameter. The golf shaft which has a convex part to make.
The method of claim 1,

The first convex portion includes a first convex center, the outer diameter of which is gradually increased from the first lower end of the first convex portion, and an outer diameter of the first convex center, which is smaller from the first convex center of the first convex portion, thereby becoming the same outer diameter as the main body.

The second convex portion has a smaller outer diameter at the second lower convex portion and a second convex center provided at a position corresponding to the first convex center at which the outer diameter becomes maximum and the outer diameter becomes smaller at the second upper end portion. A golf shaft having a convex portion, characterized in that it comprises a second upper end provided in a corresponding position.
The method of claim 2,

And a distance from the second lower end portion to the second convex center and a distance from the second convex center to the second upper end are the same.
The method of claim 1,

The weight of the sum of the first convex portion and the second convex portion (A) and the weight (B) of the main body is A: B = 1: 4, the error range of the weight ratio includes 5 to 10% A golf shaft having a convex portion, characterized in that.
The method of claim 1,

The golf shaft includes a graphite agent,

The material forming the first convex portion or the second convex portion is a golf shaft having a convex portion, characterized in that woven with a string and a blade.
The method of claim 2,

When the main body is for the wedge Golf shaft having a convex portion, characterized in that the distance from the first lower end to the first convex center or the second convex center is 300mm ± 10mm range.
The method of claim 1,

The first lower end, the golf shaft having a convex portion, characterized in that it comprises between the center point of the upper end and the lower end or spaced apart from the lower end.
The method of claim 1,

The golf shaft includes a graphite agent,

The material forming the first convex portion or the second convex portion is a golf shaft having a convex portion, characterized in that woven with a string and a blade.