WO2007021160A1

WO2007021160A1 - A golf club

Info

Publication number: WO2007021160A1
Application number: PCT/KR2006/003260
Authority: WO
Inventors: Kil-Hae Kim; Sung-Ok Cho
Original assignee: Kil-Hae Kim; Sung-Ok Cho
Priority date: 2005-08-18
Filing date: 2006-08-18
Publication date: 2007-02-22

Abstract

The golf club according to the present invention includes: a shaft having a tapered hollow and an elliptical cross-section in a kick point section; a club head connected to an end portion of the shaft which includes a face member having a flat surface to hit a ball, a crown member disposed on a upper surface of the face member, and a sole member having a second flat center plane to be touched with a ground; a head angle adjusting means for adjusting and securely fixing a lie angle, a face angle and a loft angle of the club head; and a weight balance adjusting means positioning on a predetermined portion of the club head for adjusting a weight balance when a length of the shaft or the head angle is controlled.

Description

[SPECIFICATION ] [TITLE 1

A golf club

[FIELD OF THE INVENTION]

The present invention relates to a golf club; and more particularly, to a shaft length adjustable golf club, a head weight balance and a loft angle, a lie angle and a face angle adjustable club head, fitted to each player's physical attributes.

[DESCRIPTION OF THE RELATED ART]

In general, golf is a sport which acutely reacts accordingly to the stance of the player, the swing arch, the length of the club and the grasping state of the grip, uniquely different from any other sports.

In particular, the player needs to impact a ball accurately on the sweet spot of the club head and to correct stance and swing arch to improve his game. One of the important keys to improve on the distance and the direction of the ball is whether the golf club is suited to the physical attributes of the player or not. It is because the distance and the direction of the ball are greatly affected by the moving direction of the head and the hitting position of the ball during the impact. Accordingly, if the player hits the ball with the golf club that does not fit to his physical attributes, the ball will be sliced or hooked. As shown in Fig. 1, the golf club is consisted of a grip 101, a shaft 102 and a club head 103. The shaft 102 is made out of the ultra light graphite fiber or titanium. The golf clubs are produced and sold in mass quantity with predetermined standards.

Majority of the players are unavoidably using the golf clubs which do not fit to their own physical attributes, disregarding the fact that their physical attributes are unique. There is very expensive golf club products made to fit to each player's physical attributes. Also, it is impossible to correct the tailor- made golf club products to be fitted to the swing form of the player when the swing arch and so on, changes. Also, the mass produced golf clubs are designed to grasp a rear end part of the grip and swing. Thus, it is very important for the grasping state of the grip. However, the length of the commercially available golf club does not fit to the most of players of short height attribute. Therefore, few of these players are grasping the rear end part of the grip. Most of players with short height rather grasp the lower part of the grip and swing awkwardly.

As mentioned, if the players use the golf club which does not fit to their physical attributes and the players modify swing forms unnaturally, players' games are affected. As a result, the precision and the distance of the ball are inhibited. In case of the wood driver, which hardly fits to players attributes, inside the sole part of the club head (Refers to the inside towards the shaft) only touches the ground and the outside the sole part of the club head is left raised high. As a result, it is very difficult to hit the ball due to the above mentioned cause and does not increase the distance.

Hereinafter, the conventional structure of the golf club head 200 will be described referring to the accompanying Fig. 2.

As shown on the Fig. 2, a shaft neck 203 is positioned near the face member 201 and inserted and fixated to a sole member (lower side of the head) 204 passing through the shaft connecting to the part crown member (upper side of the head) 202. It is impossible to adjust the lie angle, the loft angle and the face angle (Hereinafter, it is referred as a head angle) because the shaft neck 203 is welded to the contacting part of the crown member 202 and the sole member 204. Thus, the golf club with fixated head angle is not suited to people attributes with tall height or short height.

The players having such attributes unavoidably have to modify grasping position of the grip or the swing arch to overcome the coordination difficulties and these can cause the hooked shot or the sliced shot. Also, it can cause instability on the stance of the player because the players have to seek and adjust the stance that might fits to the fixated head angle of the golf club. Meanwhile, to overcome the above mentioned problems, there is a technique which changes the loft angle by adding a support for the angle adjustment to the sole surface of the golf club. Also, there is an invention which can change the loft angle as shown in US patent No. 4,878,666, PCT international publication No.WO88/07880(Al) and European patent No. 0 188 381 (A2). However, there are some problems remained due to the lack of coordination between the player and the golf club because those golf clubs also have fixated head angle.

The invention with the changeable face angle in US patent 6, 368, 230(Bl) also has some problems due to the lack of coordination between the lie angle and the loft angle. And the invention with the changeable lie angle in US 6, 855, 078 (B2) similarly shows some problems due to the lack of coordination between the face angle and the loft angle. Also, there is a proposed invention that is changeable on the lie angle and the face angle as shown in US patent No. 4,948,132 and US patent No.5, 626, 528. However, the above patents have technical limitation of not able to adjust loft angle according to the change of the lie angle and the face angle. Also the structure is not reliable mechanism for the angle adjustment.

[SUMMARY OF THE INVNETION] Accordingly, to solve the above-mentioned problems, an object of the present invention is to provide a golf club which is properly modifiable and securely fixable in the lie angle, the face angle and the loft angle of the club head.

Another object of the present invention is to provide a golf club which is properly modifiable and has securely length adjustable shaft to fit to the players own physical attributes. Further, another object of the present invention is to provide a golf club which have a kick point section on the shaft and manufactured to substantially bend the shaft to one sided direction and thereby correct the ball direction and increase distance by applying the hitting power into the kick point section with applying elasticity on the one side of the shaft

In accordance with one aspect of the present invention, there is provided a golf club comprising: a shaft having a specific section (kick point section) on which a bending ability of the shaft is concentrated; a club head connected to an end portion of the shaft; a head angle adjusting means for adjusting and securely fixing a lie angle, a face angle and a loft angle of the club head; and a weight balance adjusting means positioning on a predetermined portion of the club head for adjusting a weight balance when a length of the shaft or the head angle is controlled. The shaft according to the present invention includes: a main shaft portion having an elliptical kick point section; a shaft length adjusting means for adjusting a shaft length variable portion, wherein the main shaft portion is moveably inserted into the shaft length variable portion; a first fixing means, one side of which is inserted into the main shaft portion and the other side of which is fixed to the shaft length variable portion so that the shaft length variable portion is fixed to the main shaft portion; and a grip shielding the shaft length variable portion.

The golf club according to the present invention further comprise: a second fixing means for preventing the shaft length variable portion from being separated from the main shaft portion, being installed at a position where the shaft length variable portion is piled up on the main shaft portion; and a support plate in a shape of cross (+) which supports the kick point section to be bent in a right or left direction during a golf club swing and which is inserted into the kick point section of the shaft.

The head angle adjusting means according to the present invention includes: a neck supporter being installed at an inner surface of a side portion of the face member in the club head; a shaft neck adjustably fixed in the neck supporter so that the lie angle and face angle of the club head are determined; and a shaft neck fixing means for fixing the shaft neck at an adjusted position.

The neck supporter according to the present invention includes: a cylinder having a round protrusion, which is formed in an inner circumference thereof, and a downwardly rounded bottom; and a rectangular housing on which the cylinder is formed, wherein the rectangular housing has both opening sides, wherein the rectangular housing is positioned in the club head, and wherein the rectangular housing has first and second threaded holes, which are spaced out apart from each other, a pair of third threaded holes which are formed in a horizontal direction and spaced out apart from the second threaded hole, and first slots formed on front and rear sides thereof. The shaft neck according to the present invention includes: a ball inserted between the downwardly rounded bottom and the round protrusion of the cylinder and rotatablely mounted on the downwardly rounded bottom of the cylinder; a shaft end portion fixing part which is formed with the ball in a body and inserted into the cylinder and outwardly protruded; and a bracket formed at an under portion of the ball, having a first protrusion on one side thereof and a second protrusion on the other side thereof. The shaft neck fixing means according to the present invention includes: a block having first and second penetration holes which are aligned with the first and second threaded holes of the rectangular housing, respectively; a washer being in contact with the ball for preventing a first bolt from slipping, which is inserted into the first hole of the block, wherein the washer has a cylindrical cap shape and an opening portion of the washer is in contact with the ball; a first bolt passing through the first penetration hole of the block, for closely fixing the ball under the downwardly rounded bottom of the cylinder by pressing the washer; a second bolt for pressing the first protrusion of the bracket, wherein the second bolt passes through the second penetration hole of the block and then joined to the second threaded hole of the rectangular housing; a third bolt joined to the third threaded hole of the rectangular housing; a pushing plate having grooves which are shaped on both sides thereof and horizontally positioned in the first slot of the rectangular housing, wherein the pushing plate is penetrated by the third bolt to press the second protrusion of the bracket; and idling stop members for preventing the pushing plate jointed with the third bolt from idling, being respectively inserted into the first slot of the rectangular housing and the second slot of the pushing plate.

In accordance with another aspect of the present invention, there is provided a golf club comprising: a click pin receiving cylinder installed on the head of the golf club, having a plurality of recesses therein and a joint recess at a center thereof, which is installed on the head of the golf club; a weight adjusting means for controlling a weight of the club head, being optionally inserted into the plurality of grooves of the click pin receiving cylinder; and a disk cover plate for preventing the click pins inserted into the click pin receiving cylinder from being fallen out.

[effects of the present invention]

The present invention will be described in detail referring the accompanying drawings.

First, a length of a shaft can be easily lengthened or shortened and securely fixated through a structure of a main shaft part and a shaft length variable part. Thus, players are able to modify the length of the shaft according to their own physical attributes .

Second, the shaft has the kick point section which is able to concentrate bending force from the whole length of the shaft so that the distance is increased with the elasticity of a western-style bow-like way and the increased correction of the target hitting by largely decreasing swaying of the shaft or twisting during the swing.

Third, there is easily adjustable lie angle, the face angle and the loft angle of the club head so that the players are able to modify the golf club fit for their own physical attributes even when players are different in their physical attributes. This way, probability of the hook shots or slice shots can be reduced dramatically.

Fourth, the accompanying weight balance adjustment during controlling the length of the shaft or head angle is conveniently controlled by adding or subtracting the click pin for the balance adjustment or diversifying the arrangement located.

Fifth, the players can purchase the club product fitted to their own physical attributes, despite the club products purchased are mass produced, by differentiating the position of the shaft neck, respectively. Thus, players are improved in their ability to hit the ball on the sweet spot.

[BRIEF DESCRIPTION OF THE DRAWINGS]

Other objects and benefits of the present invention will become apparent upon consideration of the following written description taken in conjunction with the following figures: Fig. 1 is a perspective view for illustrating of the typical golf club;

Fig. 2 is a cross-sectional view for illustrating o the golf club shown in Fig. 1;

Fig. 3 is a perspective view showing exterior of the golf club according to preferred embodiment of the present invention;

Fig. 4 is an assembled cross-sectional view for illustrating in detail of the shaft in the golf club according to preferred embodiment of the present invention;

Fig. 5 is a cross-sectional view for illustrating in detail of the main shaft part in the shaft shown in Fig. 4;

Fig. β is a schematic view showing the shaft neck installed to the face member of the club head in the present invention;

Figs. 7 to 9 are schematic top, front and side views of the club head for illustrating of the effects of the club head according to the present invention;

Fig. 10 is a separated perspective view for illustrating in detail of the angle adjusting device of shaft neck in the golf club of the present invention; Figs. 11 to 13 are assembled front-sectional views for illustrating of the operation of the shaft neck in the golf club of the present invention;

Figs. 14 to 16 are assembled side-sectional views for illustrating of the operation of the shaft neck in the golf club of the present invention; and

Fig. 17 is a separated perspective view for illustrating in detail of the head balance adjusting device in the golf club of the present invention.

[DETAILED DESCRIPTION OF THE PREFERRED

EMBODIMENTS] Hereinafter, the preferred embodiment of the present invention will be described by referring to the accompanying Fig.3 to 17.

A golf club according to the present invention is the length adjustable shaft, the head angle and the weight balance to fit to the players own physical attributes thereby corrects the direction of the ball and increases distance.

Fig. 3 is a perspective view schematically showing an exterior of the golf club according to the preferred embodiment of the present invention.

As shown in Fig. 3, the golf club according to the preferred embodiment of present invention includes a multilevel shaft 10 variable length to fit players own physical attributes; a club head 20 connecting to the one side end part of the shaft 10; a head angle adjusting member 25 for adjusting the lie angle, the face angle and the loft angle of the club head 20 and connected between the shaft 10 and the club head 20; and a weight balance adjusting member 50 for adjusting the weight balance, which is installed to a side face of the club head 20.

Fig. 4 is a cross-sectional view for illustrating in detail of the shaft in the golf club according to preferred embodiment of the present invention; and Fig. 5 is a cross-sectional view for illustrating in detail of the main shaft part in the shaft shown in Fig. 4. As shown in Figs. 4 and 5, the shaft 10 includes: a main shaft part 2 shaped to the tapered cylinder at the predetermined angle (θ^° ); a length variable shaft part 3 for adjusting the length of the shaft 10 and moveably inserted into the outside of the main shaft part 2, which is shaped to the tapered cylinder at the predetermined angle (θ^° ); a nut 4 which is inserted into the main shaft part 2 and have grooves 4b in the outer circumference thereof for fixating the inner face of the main shaft part 2 by keeping an epoxy resin in the grooves 4b; an anchoring bolt 5 consisted of the head part having hexagonal wrench hole and the male thread for engaging with the female thread of the nut 4, which is securely inserted into the inside diameter of the length variable shaft 3 for fixating the shaft 10; a gasket 6 expanded by the tightening force of the anchoring bolt 5 for pressurizing the inside diameter of the length variable shaft 3, which is installed between the head part of the anchoring bolt 5 and the nut 4; a grip 7 having a protrusion 7a at the end part thereof preventing the rear hand from being pushed during the swing, which is inserted into the length variable shaft 3; a thermal shrinkage member 8 for preventing the length variable shaft 3 inserted into the main shaft 2 from separating, which is installed on the boundary part between the main shaft part 2 and the length variable shaft part 3. As shown in Fig. 5, the main shaft part 2 includes circular end parts on both sides thereof and the kick point section with an elliptic middle part. The short diameter of the kick point section is made to bend well by this structure of the main shaft part 2, but the long diameter of the kick point section is not made to bend well. Thus, the shaft 10 bends toward the hitting direction and does not bend toward the unnecessary direction so that the shaft 10 effectively gets the elasticity to go correct direction when the player hits the ball, thereby increase the distance.

As the other embodiment of the shaft 10, the ecliptic kick point section of the shaft 10 can be added with a support plate 9 in a shape of cross (+) which supports bending of the kick point part in one direction only during the swing. The support plate 9 may be fixated to the inside of the shaft 10 by filler such as silicon and the like.

The main shaft 2 may be manufactured in various types making different length and thickness of the kick point section to enable players to fit his own liking. In particular, the bending of the shaft concentrates the predetermined ecliptic section (the kick point section) in whole length of the shaft 10. If the bending of the shaft 10 is not dispersed on whole length of the shaft 10 and is concentrated on the kick point section, the distance increases by optimizing the elasticity like the western-style bow-like and the correction of the hit ball are increased by decreasing swaying of the shaft or twist during the swing.

In the mean time, the main shaft part 2 can be manufactured by using the fiber textile which has identical thickness and different intensity, for example the titanium fiber material, etc. At this time, the main shaft part 2 is manufactured by crossing and winding the fiber textile such as the titanium material to the diagonal direction each other. The main shaft part 2 also can be manufactured by fewer winding of the fiber textile, such as the titanium material on the kick point section different from the other part of the shaft to make the kick point section flexibly bend. Fig. 6 is a schematic view showing the shaft neck installed to the face member of the club head in the present invention; and Figs. 7 to 9 are schematic top, front and side views of the club head for illustrating of the effects of the club head according to the present invention.

As shown in Figs. 6 to 9, the club head 20 includes: a face member 11 having flat upper and lower surfaces and parallel grooves 11a formed on the outer surface to the horizontal direction and both side parts lib slanted from end part of the upper and lower surfaces each; the crown member 12 connected on the upper surface of the face member 11, which have a center plane 12a and side planes 12b, and downwardly slanted from the both sides of the center plane 12a at the predetermined angle; and a sole member 14 connected to the lower surface of the face member 11, which have a flat center plane 14a to touch the ground and side plane 14b upwardly slanting from the both sides of the center plane 14a at the predetermined angle to connect with the side planes 12b of the crown member 12.

The face member 11 is substantially manufactured to the plane of a hexagon. The part formed by the crown member 12 and the sole member 14, that is, top and bottom side interval and left and right interval gradually narrows in the face surface to a rearward to be formed in streamlined shape. Thus, the club head having the above structure can largely reduce the air resistance during the swing. In addition, the length of the face member 11 ("t" reference in Fig. 7) and breadth of the crown member 12 ("d" reference in Fig. 7) are identically formed in order to maximize the repulsive power.

As the preferred embodiment of the present invention, the strike point of the ball can be induced to the sweet spot by heightening or lowering the connecting location, that is, the location corresponding to one of the side parts lib of the face member 11 when the shaft neck 27 connects with the side plane 12a of the crown member 12.

If the shaft neck 27 is connected to the lower end part of the slanted side parts lib of the face member 11, the movement interval of the connected location is minimal, but it can induce the impact point of the person with short height to the sweet spot because the lie angle is decreased enough.

Hereinafter, the operation according to the embodiment of the present invention will be described in detail .

As shown in Fig. 7, the club head 20 is streamlined shaped that gradually narrows from the face surface to the rearward. Thus, the club head 20 can largely reduce the air resistance during the swing and maximizes the repulsive power because the length ^w I " of the face member 11 and breadth ^λλd" of the crown member 12 are identical. As shown in Fig. 8, the impact power during striking the ball is not dispersed toward the upper surface or lower part of the club head 20 because the face member 11 have the flat center part and inclining in both sides in a hexagon shape. As a result, the distance can be increased by concentrating intrinsic load of the club head 20 on the facial surface. Also, as shown in Figs. 7 and 8, the connecting location which the shaft neck 27 is connected to the side plane 12a of the crown member 12 of the club head 20, that is, the connecting location corresponding to upper part of the side parts lib inclining the face member 11 can be altered and manufactured to enable the club fitted to the players own physical attributes.

The club head 20 is provided with the sole member 14 which is horizontally touching the ground while taking the stance and the face member 11 has the flat surface so that the impact point can be induced to the sweet spot during the swing.

Fig. 10 is a separated perspective view for illustrating in detail of the head angle adjusting device used in adjusting the lie angle, the face angle and the loft angle of the shaft neck of the present invention; Figs. 11 to 13 assembled front-sectional views for illustrating an operation of the shaft neck of the present invention; and Figs. 14 to 16 assembled side- sectional views for illustrating an operation of the shaft neck of the present invention.

As shown in Figs. 11 to 16, the head angle adjusting device 25 includes a neck supporter 26 being installed to the side and inner surface of the face member 11 of the club head 20; a shaft neck 27 for adjusting the lie angle and the face angle of the club head 20, which is connected to the neck supporter 26; and a shaft neck angle adjusting member28 for fixating the shaft neck 27 at the adjusted position.

The neck supporter 26 includes a cylinder 31 having a spherical groove 33 at bottom thereof to secure the rotation angle range, which is projected onto the one side of the face member 11; and a housing 32 in a shape of rectangular opened on both sides, which is installed under the spherical groove 33 of the cylinder 31 and positioned on the inner surface of the club head 20. The housing 32 is provided with the first threaded hole and the second 32a and 32b at regular distances. The third threaded hole 32c is shaped downwards on both sides of the second threaded hole 32b at horizontal direction. And the first slot 32d is located on the front of the housing 32 and the rear.

The shaft neck 27 includes a ball 36 being inserted into the spherical groove 33 of the cylinder 31; a shaft end part fixating tube 37 which is integral with the ball 36 and inserted into the cylinder 31 and projected to outside; and a bracket 38 which have the first protrusion 38a on the one side thereof and the second protrusion 38b on the another side thereof, which is installed to the lower part of the ball 36. In the structure of the bracket 38, the first protrusion and the second 38a and 38b are shaped in tetrahedron to secure the allowable minimum contact area that the bracket 38 is fixated by pushing the second bolt. The press plate will be described later. Thus, it prevents the shaft neck 27 from twisting when outside force is applied to the ball 36. Here, it is preferable that the contact area of the first protrusion 38a is similar to the diameter of the first bolt.

The shaft neck angle adjusting member 28 includes: a block 41 having the first hole and the second 41a and 41b to be opened with the first threaded hole and the second 32a and 32b of the housing 32; a washer 42 in cylindrical shaped cap with one side opened to contact the ball 36 to prevent the first bolt 43 from slipping out, which is inserted into the first hole 41a of the block 41; a first bolt 43 connected to the first hole 41a of the block 41, which is closely fixated to the ball 36 onto the spherical groove 33 of the housing 32 by pushing the washer 42; a second bolt 44 pushing the first protrusion 38a of the bracket 38, which passes through the second hole 41b of the block 41 and then connects to the second threaded hole 32b of the housing 32; a third bolt 45 connected to the third threaded hole 32c of the housing 32; a pushing plate 46 having the second groove 46a on both sides thereof and horizontally positioned to the first slot 32d of the housing 32, which is inserted into the third bolt 45 to push the second protrusion 38b of the bracket 38; and an idling stop member 47 preventing the pushing plate 46 inserted into the third bolt 45 from idling, which is inserted into the first slot 32d of the housing 32 and the second slot 46a of the pushing plate 46 respectively. Hereinafter, the operation of the head angle adjusting device 25 according to the embodiment of the present invention will be described in detail.

In the state where the tightening force of the first bolt to the third 43, 44 and 45 is canceled, the ball 36 becomes the rotating state in the spherical groove 33 and the shaft neck 27 freely rotates.

In the state where the angle of the shaft neck 27 is adjusted to the physical attributes of player, the washer 42 straightly moves in the block 41 and closely contacts to the ball 36 according to tightening the first bolt 43. And the ball 36 is securely fixated in the spherical groove 33. If the user rotates at the direction of tightening the third bolt 45, it rotates in the home position and the pushing plate 46 backwardly and forwardly moves the male thread of the third bolt 45. Thus, while the pushing plate 46 is moving, the second protrusion 38b of the bracket 38 pressurizes and the bracket 38 is fixated to the state biased to the left.

Next, if the second bolt 44 is tightened, the first protrusion 38a of the bracket 38 is pressurized and the pressure to be biased to the right is enforced. The above mentioned operation works by securely fixates the bracket 38. Therefore, the ball 36 and the bracket 38 are fixed to the tightening force of the first bolt to the third 43, 44 and 45.

The ball 36 and the bracket 38 freely move in the housing 32 by setting the bolts free. In this way, the shaft neck 26 rotates as the angle of the face angle and lie angle can be modified according to the physical attributes of the player.

Fig. 17 is a separated perspective view for illustrating in detail a head balance adjusting device in the golf club of the present invention;

As shown in Fig. 17, the weight balance adjusting member 50 includes: a click pin receiving cylinder 51 having eight grooves 51a in the inner circumstance part thereof and a joining groove 51b at the center thereof; click pins 52 for controlling the weight of the club head 20, which is inserted into the plural grooves 51a of the click pin receiving cylinder 51; and a disk cover plate 53 for preventing the click pins 52 inserted into the receiving cylinder 51 from falling out, and a bolt shaped to one side thereof to be joined in the joining groove 51b of the click pin receiving cylinder 51. Hereinafter, in the golf club of the present invention, the adjustment procedures of the head angle in order to be fit to the physical attributes of the player will be described in detail.

It is preferable that the length of a shaft 10 is adjusted to fit to the physical attributes of the player. The length variable shaft part 3 is inserted to the outer side of the main shaft part 2, and then the length of the shaft 10 can be adjusted to fit to the physical attributes of the player by decreasing or increasing the whole length of the shaft 10. When the length of the shaft 10 is adjusted, if the bolt 5 connecting the nut 4 is tightened, the gasket 6 is expanded to pressurize the inside diameter of the length variable shaft 3. As a result, the length variable shaft 3 is fixated to the outer side of the main shaft part 2. And if the heat shrinkable tube 8 gets to be wound with the reiteration region of the length variable shaft 3 and main shaft 2 and it is heated, the length variable shaft 3 is fixated to the outer side of the main shaft 2 with the second. In conclusion, the length variable shaft 3 and the main shaft 2 is to be securely fixated by fixing operation of the twice. Thereafter, the lie angle, the face angle and the loft angle of the club head 20 can be adjusted. At this time, it is preferable that the head angle is adjusted by utilizing the golf club adjuster (not shown in figures) . The golf club adjuster is designed in order that the lie angle, the face angle and the loft angle of the golf club can be conveniently and easily adjusted to the state that the parts of the golf club can be loosened and put on the golf club adjuster.

The golf club is comprised in order that three angles of the club head 20 can adjusted with minimum efforts. However, the head angle adjustment is also possible without depending on the golf club adjuster. And if they use such apparatus, the players can easily and conveniently adjust three angles of the club head. That is, the golf club of the present invention can be put upon the adjuster and change the lie angle, the face angle and the loft angle as the player desires.

When forcing an angle in the desired form, the ball 36 does not move in the spherical groove 33 of the housing 32 when the first bolt 43 is tightened. And the third bolt 45 and the second bolt 44 are tightened sequentially. And then the shaft neck 37 remains adjusted, and the state is securely fixated. In the meantime, it is preferable that when the golf club is loosened in order to change the head angle of the golf club, first the tightening of the second bolt 44 is lifted. And then, the tightening of the first bolt 43 and the third 45 is lifted.

As described in the above, adjustment of the loft angle is completed with the lie angle and the face angle, and the weight balance of the golf club is adjusted by the method from the bulletin. The golf club has to be measured whether the weight balance has to be adjusted.

The click pin 52 is added to or subtracted from the cylinder 51 by controlling the arrangement location to balance the club head 20.

[INDUSTRIAL APPLICABILITY]

As described in the above, according to the structure of the present invention mentioned above, it is possible making the golf club fitted to the player' s own physical attributes even when the mass production of the golf club is done.

Accordingly, the golf club of the present invention can be economically provided, whether the players are small or big in their physique. In addition, it can be said that the golf club optimized to per users through the fitting special shop in the golf practice range or the golf course, or simply using the golf club adjuster. Although the preferred embodiment of the invention have been disclosed for illustrative purposes, those skilled in the art will appreciate various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

[CLAIMS]

1. A golf club comprising: a shaft having a specific section (kick point section) on which a bending ability of the shaft is concentrated; a club head connected to an end portion of the shaft; a head angle adjusting means for adjusting and securely fixing a lie angle, a face angle and a loft angle of the club head; and a weight balance adjusting means positioning on a predetermined portion of the club head for adjusting a weight balance when a length of the shaft or the head angle is controlled.

2. The golf club in accordance with claim 1, wherein the shaft includes: a main shaft portion having an elliptical kick point section; a shaft length adjusting means for adjusting a shaft length variable portion, wherein the main shaft portion is moveably inserted into the shaft length variable portion; a first fixing means, one side of which is inserted into the main shaft portion and the other side of which is fixed to the shaft length variable portion so that the shaft length variable portion is fixed to the main shaft portion; and a grip shielding the shaft length variable portion.

3. The golf club in accordance with claim 2, further comprising a second fixing means for preventing the shaft length variable portion from being separated from the main shaft portion, being installed at a position where the shaft length variable portion is piled up on the main shaft portion.

4. The golf club in accordance with claim 1, further comprising: a support plate in a shape of cross (+) which supports the kick point section to be bent in a right or left direction during a golf club swing and which is inserted into the kick point section of the shaft.

5. The golf club in accordance with claim 1, wherein the club head includes: a face member having a flat surface to hit a ball; a crown member disposed on a upper surface of the face member, which has a first flat center plane and a first side plane, wherein the first side plane is downwardly slanted from the first flat center plane at a predetermined angle; and a sole member disposed on a lower surface of the face member, which has a second flat center plane to be touched with a ground and a second side plane, wherein the second side plane is upwardly slanted from the second center plane at a predetermined angle and is coupled to the first side plane of the crown member, wherein a maximum length (() of the face member and a maximum depth (d) of the crown member are substantially the same.

6. The golf club in accordance with claim 1, wherein the head angle adjusting means includes: a neck supporter being installed at an inner surface of a side portion of the face member in the club head; a shaft neck adjustably fixed in the neck supporter so that the lie angle and face angle of the club head are determined; and a shaft neck fixing means for fixing the shaft neck at an adjusted position.

7. The golf club in accordance with claim 6, wherein the neck supporter includes: a cylinder having a round protrusion, which is formed in an inner circumference thereof, and a downwardly rounded bottom; and a rectangular housing on which the cylinder is formed, wherein the rectangular housing has both opening sides, wherein the rectangular housing is positioned in the club head, and wherein the rectangular housing has first and second threaded holes, which are spaced out apart from each other, a pair of third threaded holes which are formed in a horizontal direction and spaced out apart from the second threaded hole, and first slots formed on front and rear sides thereof.

8. The golf club in accordance with claim 7, wherein the shaft neck includes: a ball inserted between the downwardly rounded bottom and the round protrusion of the cylinder and rotatablely mounted on the downwardly rounded bottom of the cylinder; a shaft end portion fixing part which is formed with the ball in a body and inserted into the cylinder and outwardly protruded; and a bracket formed at an under portion of the ball, having a first protrusion on one side thereof and a second protrusion on the other side thereof.

9. The golf club in accordance with claim 6, wherein the shaft neck fixing means includes: a block having first and second penetration holes which are aligned with the first and second threaded holes of the rectangular housing, respectively; a washer being in contact with the ball for preventing a first bolt from slipping, which is inserted into the first hole of the block, wherein the washer has a cylindrical cap shape and an opening portion of the washer is in contact with the ball; a first bolt passing through the first penetration hole of the block, for closely fixing the ball under the downwardly rounded bottom of the cylinder by pressing the washer; a second bolt for pressing the first protrusion of the bracket, wherein the second bolt passes through the second penetration hole of the block and then joined to the second threaded hole of the rectangular housing; a third bolt joined to the third threaded hole of the rectangular housing; a pushing plate having grooves which are shaped on both sides thereof and horizontally positioned in the first slot of the rectangular housing, wherein the pushing plate is penetrated by the third bolt to press the second protrusion of the bracket; and idling stop members for preventing the pushing plate jointed with the third bolt from idling, being respectively inserted into the first slot of the rectangular housing and the second slot of the pushing plate.

10. The golf club in accordance with claim 1, wherein the weight balance adjusting means includes: a click pin receiving cylinder having a plurality of recesses therein and a joint recess at a center thereof; a click pin for controlling a weight of the club head, being inserted into the a plurality of the recesses of the click pin receiving cylinder; and a disk cover plate for preventing the click pins inserted into the click pin receiving cylinder from being fallen out, having a bolt joined to the joint recess of the click pin receiving cylinder.

11. A golf club comprising: a main shaft portion having a specific section (kick point section) on which a bending ability of the main shaft is concentrated; a shaft length adjusting means for adjusting a shaft length variable portion, wherein the main shaft portion is moveably inserted into the shaft length variable portion; a first fixing means, one side of which is inserted into the main shaft portion and the other side of which is fixed to the shaft length variable portion so that the shaft length variable portion is fixed to the main shaft portion after the length of the shaft is adjusted; and a grip shielding the shaft length variable portion.

12. The golf club in accordance with claim 11, further comprising a second fixing means for preventing the shaft length variable portion from being separated from the main shaft portion, being installed at a position where the shaft length variable portion is piled up on the main shaft portion.

13. The golf club in accordance with claim 11, further comprising a support plate in a shape of cross (+) which supports the kick point section to be bent in a right or left direction during a golf club swing and which is inserted into the kick point section of the shaft.

14. The golf club in accordance with claim 11, wherein the first fixing means includes: a nut which is inserted into the main shaft portion and has grooves in an outer circumference thereof for fixing an inner face of the main shaft portion by keeping an epoxy resin in the grooves; a anchoring bolt having a head portion which has a hexagonal wrench hole and a male thread to be joined to a female thread of the nut, wherein the anchoring bolt is securely inserted into the inner diameter of the shaft length variable portion; a gasket outwardly expanded by tightness of the anchoring bolt for pressurizing the inner diameter of the shaft length variable portion, wherein the gasket is installed between the head portion of the anchoring bolt and the nut .

15. The golf club in accordance with claim 11, wherein the main shaft is manufactured by wrapping the textile fabric of a titanium material in a diagonal direction and wherein the wind of the textile fabric at the kick point section is less than that of at other parts of the on than the other parts of the main shaft so that the kick point section has a different flexibility from other parts.

16. The golf club in accordance with claim 11, further comprising a grip having a protrusion at an end portion thereof for preventing a hand from being pushed out at the time of taking a golf swing, wherein the grip shields the shaft length variable portion.

17. A golf club comprising: a neck supporting means installed within a face member of a club head; a shaft neck adjustably and rotatablely fixed in the neck supporting means so that a lie angle and a face angle of the club head are determined; and a shaft neck fixing means for fixing the shaft neck at an adjusted position.

18. The golf club in accordance with claim 17, wherein the neck supporting means includes: a cylinder having a round protrusion, which is formed in an inner circumference thereof, and a downwardly rounded bottom in order that the shaft is securely inserted into the cylinder; and a rectangular housing on which the cylinder is formed, wherein the rectangular housing is positioned in the club head, and wherein the rectangular housing has both opening sides.

19. The golf club in accordance with claim 18, wherein the rectangular housing includes: first and second threaded holes, which are spaced out apart from each other; a pair of third threaded holes which are formed in a horizontal direction and spaced out apart from the second threaded hole; and first slots formed on front and rear sides thereof.

20. The golf club in accordance with claim 18, wherein the shaft neck includes: a ball inserted between the downwardly rounded bottom and the round protrusion of the cylinder; a shaft end portion fixing part which is formed with the ball in a body and inserted into the cylinder and outwardly protruded; and a bracket formed at an under portion of the ball, having a first protrusion on one side thereof and a second protrusion on the other side thereof.

21. The golf club in accordance with claim 18, wherein the shaft neck fixing means includes: a block having first and second penetration holes which are aligned with the first and second threaded holes of the rectangular housing, respectively; a washer being in contact with the ball for preventing a first bolt from slipping, which is inserted into the first hole of the block, wherein the washer has a cylindrical cap shape and an opening portion of the washer is in contact with the ball; a first bolt passing through the first penetration hole of the block, for closely fixing the ball under the downwardly rounded bottom of the cylinder by pressing the washer; a second bolt for pressing the first protrusion of the bracket, wherein the second bolt passes through the second penetration hole of the block and then joined to the second threaded hole of the rectangular housing; a third bolt joined to the third threaded hole of the rectangular housing; a pushing plate having grooves which are shaped on both sides thereof and horizontally positioned in the first slot of the rectangular housing, wherein the pushing plate is penetrated by the third bolt to press the second protrusion of the bracket; and idling stop members for preventing the pushing plate jointed with the third bolt from idling, being respectively inserted into the first slot of the rectangular housing and the second slot of the pushing plate.

22. A golf club comprising: a click pin receiving cylinder installed on the head of the golf club, having a plurality of recesses therein and a joint recess at a center thereof, which is installed on the head of the golf club; a weight adjusting means for controlling a weight of the club head, being optionally inserted into the plurality of grooves of the click pin receiving cylinder; and a disk cover plate for preventing the click pins inserted into the click pin receiving cylinder from being fallen out.

23. The golf club in accordance with claim 22, wherein the weight adjusting means has a plurality of metallic click pins