JP2006223395A - Golf club - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club overcoming bad habit of swinging. <P>SOLUTION: A holder 14 to be attached to a shaft 11 of this golf club is formed with a slice groove 21 in a position of 45° in the opposite direction to a ball driving direction using an intersection between a reference axis S being in parallel to a club face F and orthogonal to a central axis O of the shaft 11 and a holder outer circumferential face in a player side as a reference point SO, and a hook groove 22 in a position of 30° from the datum point SO in the ball driving direction T. When a player swings the club with a fin attached in the slice groove 21, a twisting force in the direction of closing the club face F is applied to the shaft 11 in a swinging process till 45° right before the impact. When the player swings the fin in the hook groove 22 in stead of the slice groove, the twisting force in the direction of opening the club face is applied to the shaft in the similar process. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a golf club for correcting bad habits of golf swing, and more particularly to a golf club suitable for practice when a golf experienced person corrects a swing error.

  A golf club for hitting a golf ball includes a wood for the purpose of throwing the ball far away to increase the distance, an iron, a sand edge and a pitching edge for the purpose of bringing the ball to the green, a green There is a putter aiming at the cup above. Each golf club has a shaft, a head provided at the tip portion thereof, and a grip provided at the base end portion of the shaft.

  When shooting the ball, after the player has lifted the golf club to the top position in a state where the position of the foot is determined with the will to hit the ball, that is, the stance is determined, The ball is swung down to an impact position where the club face of the club head hits the ball, and a follow swing is performed. As described above, the club head swings in a circular orbital swinging motion by swinging the golf club from swinging up to swinging down until the follow-through is completed. If the swing trajectory before and after the impact becomes inside-in and the club face is perpendicular to the flying ball direction, that is, a square, the ball can be shot straight toward the target landing point.

  When the club face is opened, for example, about 10 degrees at the time of impact, that is, in the case of a right-handed player, when the club face is tilted to the right with respect to the flying ball line, the shot ball turns to the right and becomes a slice ball. On the other hand, when the club face is closed by about 10 degrees at the time of impact, that is, in the case of a right-handed player, when the club face is tilted to the left with respect to the flying line, the shot ball bends to the left. It becomes a hook ball.

  Swinging a golf club ideally so that the club face is always square at the time of impact is not easy for golfers, and players who tend to have sliced balls will often have sliced balls. So, players who tend to get hookballs will often get hookballs, and it is not easy to fix bad swing habits once worn and make ideal swings possible .

  Various training devices have been developed to correct errors for players with bad swinging habits, but it is not easy to make the body feel the swinging sensation of a club face when impacting Therefore, the present inventor has conducted various experimental studies in order to develop a golf club for correcting bad habits of swing. In this experiment, the down top swing is set to a 4/4 position at a head top position where the club head is opposite to the impact position in the swing path, that is, a position about 180 degrees before the impact, and a position about 135 degrees before the impact is 3/4. The position about 90 degrees before the impact was set to the 1/2 position, and the position about 45 degrees before the impact was set to the 1/4 position.

  At the time of downswing where the club head is swung down from the top position to the impact position, the club head is swung down from the top position to the impact position while increasing the head speed. It becomes higher than the 4 position. Therefore, in order to correct the tilt of the club face to the open or closed state at the time of impact by using the wind pressure applied to the club head under the increased speed, an attempt to attach a correction fin to the shaft However, it was not possible to correct the player's bad habit.

  Therefore, the relationship between the wind pressure and the force applied in the direction of twisting the shaft was sought. As a result, about 90 degrees (1/2 position) to about 45 degrees (1/4 position) before the impact in the middle of the downswing where the club head is swung down from the top position to the impact position. It was found that the direction of the club face during the period had a great influence on the generation of slice balls and hook balls. At the end of the downswing from about 45 degrees (1/4 position) before impact to the impact, the head speed is the fastest, but since the head speed is faster, the inertial force of the golf club increases and the wind pressure applied to the head Also grows. For this reason, even if the correction fin is attached to the shaft so as to correct the club face by receiving the wind pressure at the end of the downswing, it adds to the inertial force and head of the golf club rather than the effect of the wind pressure applied to the correction fin at the end of the downswing. Trials by many monitors revealed that the shaft rotation force by wind pressure was superior and that swing could not be corrected.

  When a number of golfers with bad habits with slicing balls etc. were used as monitors or subjects, an experiment was conducted. At half position of the downswing, it opened about 0 to -15 degrees with respect to the ideal club face angle. In other words, when it is in an open state, a slice ball comes out, and a hook ball comes out from a 20 to 30 degree closed or closed state with respect to an ideal club face angle at the 1/2 position. It was. That is, the reason why the slice ball and the hook ball come out is considered that the club face direction from the initial stage to the middle stage of the down swing is inclined with respect to the ideal direction. Therefore, if the club face can be set to the ideal club face angle at each position while downswing from the 1/2 position to the 1/4 position, the club face can be squared at the time of impact, and a milling ball or hook It has been found that the generation of balls can be prevented. The present invention has been made based on such experimental research.

  An object of the present invention is to correct a wrinkle with a bad swing by swinging using a golf club.

  An object of the present invention is to make it possible to learn a swing without a sliced ball.

  An object of the present invention is to make it possible to learn a swing free of hook balls.

  The golf club of the present invention is a golf club having a shaft, a club head provided at a distal end portion thereof, and a grip provided at a proximal end portion of the shaft, the golf club being positioned closer to the grip side than the club head. A direction 20 opposite to the flying direction with a reference point as an intersection of a holder provided at the tip of the shaft, a reference line parallel to the club face and perpendicular to the central axis of the shaft, and the outer peripheral surface of the holder on the player side A slice correcting fin provided on the holder so as to protrude outward at any position in the slicing correction range of ˜105 degrees, and a force in a direction to close the club face on the shaft when swinging by the slice correcting fin. It is characterized by adding.

  The golf club of the present invention is a golf club having a shaft, a club head provided at a distal end portion thereof, and a grip provided at a proximal end portion of the shaft, the golf club being positioned closer to the grip side than the club head. A hook provided in a flying direction of 20 to 40 degrees with a holder provided at the tip of the shaft, and an intersection of a reference line parallel to the club face and perpendicular to the central axis of the shaft and the outer peripheral surface of the holder on the player side as a reference point A hook correcting fin that protrudes outward at any position in the correction range and is provided on the holder, and the hook correcting fin applies a force in the direction of opening the club face to the shaft during swinging. To do.

  The golf club of the present invention is a golf club having a shaft, a club head provided at a distal end portion thereof, and a grip provided at a proximal end portion of the shaft, the golf club being positioned closer to the grip side than the club head. A direction 20 opposite to the flying direction with a reference point as an intersection of a holder provided at the tip of the shaft, a reference line parallel to the club face and perpendicular to the central axis of the shaft, and the outer peripheral surface of the holder on the player side A slice groove formed in the holder at any position in the slicing correction range of ˜105 degrees, and formed in the holder at any position in the hook correction range of 20 to 40 degrees in the flying direction from the reference point. The hook groove and the slice groove and the hook groove are selectively attached to the holder so as to protrude outward from the holder. The swing correction fins mounted on the slice grooves apply a force in the direction of closing the club face to the shaft when swinging, and the swing correction fins mounted on the hook grooves swing. Sometimes, a force is applied to the shaft in a direction to open the club face.

  The golf club of the present invention is a golf club having a shaft, a club head provided at a distal end portion thereof, and a grip provided at a proximal end portion of the shaft, the golf club being positioned closer to the grip side than the club head. A holder provided rotatably at the tip of the shaft, a swing correction fin provided projecting outward from the holder, a reference line parallel to the club face and perpendicular to the central axis of the holder, and the holder on the player side Any position in the slice correction range of 20 to 105 degrees opposite to the flying ball direction with the intersection with the outer peripheral surface as a reference point, and any of the hook correction ranges of 20 to 40 degrees in the flying ball direction from the reference point Fixing means for fixing the holder to the shaft in a state where the swing correction fin is positioned at the position of The swing correction fin set in the slice correction range applies a force in the direction of closing the club face to the shaft when swinging, and the club face is applied to the shaft in the swing by the swing correction fin set in the hook correction range. It is characterized by applying a force in the direction of opening.

  According to the present invention, the torsional force is applied from the slice correction fin to the shaft in the direction in which the club face is closed by the wind pressure applied to the slice correction fin in the downswing process up to about 45 degrees before the impact. At impact, the club face is square. By practicing to feel the swing sensation of becoming a square at the time of impact, you can hit a straight ball that does not produce a sliced ball even if you swing using a normal golf club.

  According to the present invention, the torsional force is applied from the slice correction fin to the shaft in the direction in which the club face opens due to the wind pressure applied to the hook correction fin in the downswing process up to about 45 degrees before the impact. At impact, the club face is square. By practicing to feel the swing sensation of becoming a square at the time of impact, it becomes possible to hit a straight ball that does not produce a hook ball even when swinging using a normal golf club.

  Slice correction and hook correction are performed with one golf club by selectively detachably attaching a swing correction fin for correcting the slice to the holder and a hook correction fin for correcting the hook. be able to.

  By mounting the holder on the shaft so as to be rotatable, it is possible to perform slice correction and hook correction by adjusting the angle of the swing correction fin provided on the holder.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing a golf club according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view showing a main part of FIG. 1, and FIG. 3 is an enlarged view taken along line 3-3 in FIG. 4 (A) is an enlarged front view in the direction indicated by reference numeral 4 in FIG. 2, and FIG. 4 (B) is a cross-sectional view taken along line 4B-4B in FIG. 4 (A). 4 (C) and 4 (D) are cross-sectional views showing modifications of the fin, and FIG. 5 is a side view showing a state in which the player has addressed with a golf club.

  A golf club 10 shown in FIG. 1 is a driver, that is, a No. 1 wood club, and includes a shaft 11, a head 12 provided at a distal end portion thereof, and a grip 13 provided at a proximal end portion. The head 12 is provided with a club face F which is a surface for hitting a ball, and the club face F is set to a predetermined loft angle. A golf club 10 shown in FIG. 1 is an example of a driver to which the present invention is applied, and the present invention is also applied to other golf clubs such as a long iron and a middle iron.

  The shaft 11 is provided with a holder 14 that is positioned at the tip of the shaft 11 and closer to the grip 13 than the head 12. As shown in FIG. 2, the holder 14 has a cylindrical portion 15, a taper portion 16 on the head 12 side, and a taper portion 17 on the grip 13 side. The holder 14 is formed of rubber or plastic and is fitted on the shaft 11. Yes. As shown in FIG. 3, the holder 14 is formed with three fin mounting grooves 21 to 23. Each fin mounting groove 21 to 23 extends in a direction along the central axis of the shaft 11 as shown in FIG. Yes. The fin attachment groove 21 is a slice groove, the fin attachment groove 22 is a hook groove, and the fin attachment groove 23 is a power groove.

  FIG. 3 shows a state in which the player swings down the golf club 10 and hits the ball B against the club face F of the head 12, that is, at the time of impact. The target direction of the central axis O, that is, the flying ball direction T is parallel to the flying ball line Tb of the ball B. In FIG. 5, the swing trajectory R when the golf club 10 is swung up and hit with the ball under the address of the player is indicated by a two-dot chain line, and the flying line Tb of the ball B is shown in FIG. 3. Is shown as a tangent to the swing track R.

  In FIG. 3, a line along the edge of the club face F and parallel to the ground is defined as an edge line E, and a line parallel to the edge line E and perpendicular to the central axis O of the shaft 11 (the central axis of the holder 14). Assuming that the reference line is S, and the intersection of the reference line S and the outer peripheral surface of the holder 14 on the outer peripheral surface on the player side is the reference point S0, the shaft 11 is opposite to the flying ball direction T from the reference point S0. A slice groove 21 is formed at the position (the position of S1) with the angle of 45 degrees around the central axis O as the slice correction angle θ1. On the other hand, the hook groove 22 is formed at that position (the position of S2) with a hook correction angle of 30 degrees around the central axis O of the shaft 11 in the direction of the flying ball T from the reference point S0. Further, the power groove 23 is formed at the position (position S3) with a power angle of 180 degrees around the center axis O of the holder 14 from the reference point S0.

  Each fin mounting groove 21 to 23 has a narrower opening than the bottom, and has a dovetail shape, that is, a wedge shape. The fins 24 shown in FIG. 4 are detachably mounted on the fin mounting grooves 21 to 23, that is, detachably mounted. As shown in FIG. 4 (B), the fin 24 has an engaging portion 25 inserted in each fin mounting groove 21 to 23 in the axial direction and a pressure receiving portion 26 provided integrally therewith to receive wind pressure. In addition, the cross-sectional shape of the engaging portion 25 is a dovetail shape corresponding to the cross-sectional shapes of the fin mounting grooves 21 to 23.

  As shown in FIG. 2, each of the fin mounting grooves 21 to 23 is opened in the axial direction on the grip side and closed on the head side. Therefore, when the fins 24 are mounted in the fin mounting grooves 21 to 23, respectively. The fins 24 can be mounted by sliding them from the grip side and inserting them into the respective sides, and the fins 24 can be removed from the fin mounting grooves 21 to 23 by pulling the fins 24 toward the grip side. Since the engagement portion 25 of the fin 24 has a dovetail shape, the attachment and removal of the fin 24 with respect to the fin attachment grooves 21 to 23 can be easily performed by sliding the fin 24 along the shaft 11, The fin 24 does not come off in the radial direction of the shaft 11, and the fin 24 does not come off during swing. As shown in FIGS. 4C and 4E, the cross-sectional shape of the engaging portion 25 is a shape that can be attached and removed by sliding in the axial direction without detaching in the radial direction of the shaft 11. A T-shape or a single-side inclined shape may be used.

  6A is a cross-sectional view showing a state where the fins 24 (swing correction fins) are mounted in the fin mounting grooves 21 of the holder 14 shown in FIGS. 1 and 2, that is, the slice grooves, and FIG. FIG. 6C is a cross-sectional view showing a state in which fins 24 (swing correction fins) are mounted in the fin mounting grooves 22, that is, hook grooves of FIG. 6, and FIG. It is sectional drawing which shows the state which mounted | worn.

  As shown in FIG. 6 (A), when the fins 24 are attached to the slicing grooves 21 and the swing practice is performed, the swing correction for slicing correction can be performed for a player who gets a slice ball. On the other hand, as shown in FIG. 6B, when swinging practice is performed by attaching the fins 24 to the hook groove 22, swinging practice for hook correction can be performed for a player who comes out of a hook ball. Further, as shown in FIG. 6 (C), when the fins 24 are attached to the power grooves 23 and the swing exercise is performed, the flight distance can be increased. When swinging practice is performed by attaching fins 24 to each of the slicing groove 21 and the power groove 23, slicing correction and flying distance can be practiced, and the fins 24 are attached to the hook groove 22 and the power groove 23, respectively. And if you practice swing, you can practice hook correction and flight distance up.

  FIG. 7 is an explanatory diagram of the swing trajectory in which the swing trajectory R shown in FIG. 5 is drawn as an ideal circle. In FIG. 7, when the golf club 10 is swung up from the addressed position to the top position and then swings down to the impact position and hits the ball B, between the position of about 180 degrees before the impact and the position of the impact. Are divided into four areas, the head 12 is substantially at the top position 4/4, the position about 135 degrees before the impact is 3/4 position, the position about 90 degrees before the impact is 1/2 position, The position about 45 degrees before the impact was set to the 1/4 position.

  FIG. 8 shows a swing trajectory in which fins 24, that is, swing correction fins are attached to the slice grooves 21, and the change state of the swing correction fin 24 in each region shown in FIG. 7 is shown together with the change state of the edge line E direction of the club face F. When the head 12 is swung down from the 4/4 position toward the impact position, the swing correction fin 24 changes from the state shown in FIG. 8D to the state shown in FIG. 8A. However, FIG. 8 shows a case where the club face is swung in an ideal direction.

  As shown in FIG. 8, the flying direction T is defined by using the intersection point of the reference line S parallel to the club face, that is, the edge line E and orthogonal to the center axis O of the shaft 11, and the outer peripheral surface of the holder 14 as the reference point S0. Since the swing correcting fin 24 is provided at a position of 45 degrees in the opposite direction, the edge line E of the club face F is ideally parallel to the head moving direction M at the 3/4 position, and the club face F Is 0 degrees with respect to the head moving direction M. At the 1/2 position, the club face F is inclined by about 15 degrees with respect to the head moving direction M, and at the 1/4 position, the club face F is inclined by about 45 degrees with respect to the head moving direction M and becomes 90 degrees at the time of impact. .

  In the process in which the head 12 is swung down to the 1/2 position, the speed of the head 12 does not increase to the maximum speed, so that the large wind pressure applied to the fin 24 is not increased, and the shaft 11 is moved even if the wind pressure is applied to the fin 24. The twisting force is not so much applied from the fin 24 to the shaft 11. On the other hand, in the process from the ½ position to the ¼ position, the head speed is higher than before, so that the rotational force in the direction of closing the club face F is applied to the shaft 11 by the wind speed applied to the fins 24. . In this swing-down process, the fin 24 is closer to the player side than the line of the head movement direction M perpendicular to the central axis of the holder 14, that is, the shaft central axis O, so the club face F is closed to the shaft 11 by the fin 24. A torsional force is applied in the direction. In the process of swinging down from the ¼ position to the impact position, the head speed is further increased, a force acting in the direction of opening the club face F is applied by the wind force applied to the club face F, and the inertial force of the golf club 10 is also increased. Even if a rotational force in the direction of closing the club face F is applied by this, the shaft 11 is not twisted in this process.

  As described above, when a player who produces a sliced ball hits the ball B using the golf club 10 in which the fin 24 is mounted in the slice groove 21, the fin 24 does not have the ideal change shown in FIG. As indicated by 24 s in C) and (D), for example, the club face F is opened 10 degrees and the head 12 is swung down. However, when the golf club 10 in which the fin 24, that is, the swing correcting fin is mounted in the slice groove 21, is downswinged, the club face is caused by the wind force applied to the fin 24 between the 1/2 position and the 1/4 position where the head speed is increased. When the shaft 11 is twisted in the direction in which F is closed, the club face F becomes a square in an almost ideal state at the 1/4 position, and the club face F is in an ideal square state as shown in FIG. Become.

  As a result of experiments with many players who frequently generate slice balls as monitors or subjects, the opening angle of the club face F at the time of the impact of the player who generates the slice balls varies, and the head speed also varies. As described above, the slice correction angle θ1 is set to 45 degrees as described above from the average opening angle of many players who need the image. Any angle in the range of 105 degrees was preferable, and the range in which the slice correction effect was particularly obtained was preferably in the range of 40 degrees to 50 degrees. In this way, a force in the direction of closing the club face F is applied to the shaft by the wind applied to the slice correction fin in the swing process in the range of about 90 degrees (1/2 position) to 45 degrees (1/4 position) before the impact. Thus, slice correction can be performed. By wearing a corrected swing feeling, it is possible to wear a swing that prevents the occurrence of slicing when swinging with a normal golf club.

  FIG. 9 shows a swing trajectory in which fins 24, that is, swing correction fins are mounted in the hook grooves 22 and changes in the orientation of the swing correction fins 24 in each region shown in FIG. When the head 12 is swung down from the 4/4 position toward the impact position, the swing correction fin 24 changes from the state shown in FIG. 9D to the state shown in FIG. 9A. However, FIG. 9 shows a case where the club face F is swung in an ideal orientation, as in the case of FIG.

  As shown in FIG. 9, the direction of the flying ball with the intersection of the reference line S parallel to the club face F, that is, parallel to the edge line E and orthogonal to the center axis O of the shaft 11, and the outer peripheral surface of the holder 14 as the reference point S0. Since the swing correction fin 24 is provided at a position of 30 degrees in T, the edge line E of the club face F at each position from the 3/4 position to the impact changes in the same manner as shown in FIG.

  As described above, in the process in which the head 12 is swung down to the 1/2 position, the speed of the head 12 does not increase to the maximum speed, so that the large wind pressure applied to the fin 24 does not increase and the wind pressure is applied to the fin 24. However, a rotational force that twists the shaft 11 is not applied to the shaft 11 from the fins 24. On the other hand, in the process from the ½ position to the ¼ position, the head speed is higher than before, so that the torsional force, that is, the rotational force in the direction of opening the club face F on the shaft 11 by the wind pressure applied to the fin 24. Is added. In this swing-down process, the fin 24 is on the opposite side of the player side from the line of the head moving direction M perpendicular to the central axis of the holder 14, that is, the shaft central axis O. A rotational force in the direction of closing F is applied. In the process of swinging down from the ¼ position to the impact position, the head speed is further increased, so that the force acting in the direction of closing the club face F is applied by the wind pressure applied to the club face F, and the inertial force of the golf club 10 is also increased. Even if a rotational force in the direction of closing the club face F is applied by 24, the shaft 11 is not twisted in this process.

  As described above, when a player with a hook ball hits the ball B using the golf club 10 in which the fin 24 is mounted in the hook groove 22, the fin 24 does not have the ideal change shown in FIG. As indicated by 24h in C) and (D), for example, the club face F is closed by about 20 degrees, and the head 12 is swung down. However, when the golf club 10 having the fin 24, that is, the swing correcting fin is mounted on the hook groove 22, is swung by the wind pressure applied to the fin 24 between the 1/2 position and the 1/4 position where the head speed is increased. When the shaft 11 is twisted and rotated in the opening direction, the club face F becomes a square in an almost ideal state at the 1/4 position, and the club face F is in an ideal square state as shown in FIG. Become.

  Experiments were conducted with many players who frequently generate hook balls as monitors or subjects. The angle at which the club face F closes at the time of the impact of the player who generates the hook balls varies, and the head speed also varies. As described above, the hook correction angle θ2 is set to 30 degrees as described above from the average opening angle of many players who need the hook. It was preferable to set any angle within the range of 40 degrees. In this way, wind pressure is applied in the direction in which the club face F opens on the shaft 11 by the wind applied to the hook correcting fins during the swing process in the range of about 90 degrees (1/2 position) to 45 degrees (1/4 position) before the impact. By adding, hook correction can be performed. By acquiring a swinging feeling corrected using the golf club 10, it is possible to wear a swing that prevents the occurrence of hooks when swinging with a normal golf club.

  FIG. 10 is an explanatory view of a swing track showing the change state of the direction of the power fin 24 in each region shown in FIG. When the head 12 is swung down from the 4/4 position toward the impact position, the power fin 24 changes from the state shown in FIG. 10D to the state shown in FIG. However, FIG. 10 shows a case where the club face is swung in an ideal orientation, as in FIGS. 8 and 9.

  When the power fin 24 is mounted at a position of 180 degrees in this way, the power fin 24 is parallel to the club face F, so that it becomes a right angle or square with respect to the flying ball direction T near the impact, Since a large wind pressure is applied, the force at impact will be weakened. Therefore, when the golf club 10 is swung with the power fins 24 mounted, the muscular strength can be increased and the swing with the power fins 24 removed can be felt lightly.

  By attaching the fins 24 of the slice groove 21 or the hook groove 22 in addition to the power groove 23, the slice correction or the hook correction can be performed while improving the muscular strength.

  As shown in FIG. 4 (A), the fin 24 has a trapezoid whose both end faces are inclined so that the length of the tip is shortened. However, the fin 24 may be a trapezoid inclined in the opposite direction. The shape of the pressure receiving portion 26 of the fin 24 is not limited to the illustrated case. The area of the pressure receiving portion 26 is set to about 100 to 200 cm, and the head speed differs depending on the player. Therefore, it is preferable to prepare a plurality of fins 24 having different areas.

  The golf club 10 shown in FIG. 2 is a fin detachable type in which three fins are detachably attached to the holder 14, but the fins may be fixed.

  FIG. 11 is a cross-sectional view showing a case where the slice correction fin 24 is provided integrally with the holder 14 at the same angle as the slice correction angle θ1 shown in FIG. 3, and FIG. 12 shows the hook correction fin θ2 shown in FIG. It is sectional drawing which shows the case where it provides integrally with the holder 14 as the same angle. Also in the case shown in FIGS. 11 and 12, the slice correction angle θ1 can be set to the above-described range (20 to 105 degrees), and the hook correction angle θ2 is also set to the above-described range (20 to 40 degrees). Can be set.

  13 is a perspective view showing a main part of a golf club 10 according to another embodiment of the present invention, and FIG. 14 is a cross-sectional view of FIG. In this case, the holder 14 is integrally provided with fins 24, that is, swing correction fins, and the holder 14 is rotatably attached to the shaft 11. An annular stopper 31 is fixed to the head side of the shaft 11, and an annular fastener 32 is attached to the grip side of the shaft 11 so as to be slidable in the axial direction along the shaft 11. The stopper 31 is formed with an inclined surface 31a to which the tapered portion 16 of the holder 14 is fitted, and the fastener 32 is formed with an inclined surface 32a to which the tapered portion 17 of the holder 14 is fitted. In FIG. 14, as shown by the two-dot chain line, the holder 14 can be rotated by releasing the contact between the inner peripheral surface of the holder 14 and the outer peripheral surface of the shaft 11. Thereby, the swing correction fin 24 can be set to either the slice correction angle θ1 or the hook correction angle θ2.

  When the holder 14 is fixed to the shaft 11 with the swing correction fin 24 set at a predetermined angle, the fastener 32 is moved toward the head 12. Thereby, the taper portion 16 of the holder 14 is elastically deformed radially inward by the stopper 31, the taper portion 17 is elastically deformed radially inward by the fastener 32, and the inner peripheral surface of the holder 14 is The holder 14 is in close contact with the outer peripheral surface of the shaft 11 and is in close contact with the shaft 11. The holder 14 is provided with a plurality of slits 33 along the axial direction so that the holder 14 is easily elastically deformed in the radial direction. In order to display the angle with respect to the reference position of the swing correction fin 24 on the outer peripheral surface of the stopper 31, an angle display portion 34 is marked as shown in FIG. 13, and when the angle of the swing correction fin 24 is adjusted. The angle is adjusted while looking at the numerical value of the angle display unit 34.

  In the case shown in FIGS. 13 and 14, the fixing means is constituted by the stopper 31 and the fastener 32. However, the positional relationship between the stopper 31 and the fastener 32 may be arranged so as to be turned upside down. The tool 32 may be screwed to the shaft 11.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, the shape of the outer peripheral surface of the holder 14 is not limited to the illustrated circle, and may be a polygon or a rectangle.

1 is a front view showing a golf club according to an embodiment of the present invention. It is an expansion perspective view which shows the principal part of FIG. It is an expanded sectional view which follows the 3-3 line in FIG. (A) is an enlarged front view in the direction indicated by reference numeral 4 in FIG. 2, (B) is a sectional view taken along line 4B-4B in (A), and (C) and (D) are modified examples of fins. FIG. It is a side view which shows the state which the player addressed with the golf club. (A) is sectional drawing which shows the state which mounted | wore the fin attachment groove | channel (slice groove | channel) of the holder shown in FIG.1 and FIG.2 with the fin (swing correction fin), (B) is the fin attachment groove | channel (hook groove | channel) of a holder. ) Is a cross-sectional view showing a state where fins (swing correction fins) are mounted, and FIG. 8C is a cross-sectional view showing a state where fins (power fins) are mounted in the power grooves of the holder. FIG. 6 is a swing trajectory explanatory diagram depicting the swing trajectory shown in FIG. 5 as an ideal circle. FIG. 8 is an explanatory view of a swing path illustrating a change state of the direction of the swing correction fin in each region illustrated in FIG. 7 when the swing correction fin is mounted on the slice groove and swinged. FIG. 8 is an explanatory diagram of a swing path illustrating a change state of the direction of the swing correction fin in each region illustrated in FIG. 7 when the swing correction fin is mounted in the hook groove and swinged. FIG. 8 is an explanatory diagram of a swing track showing a change state of the direction of the power fin in each region shown in FIG. 7 when swinging with the power fin attached to the power groove. It is sectional drawing which shows the principal part of the golf club integrally provided in the holder by making the slice correction fin into the same angle as the slice correction angle shown in FIG. It is sectional drawing which shows the principal part of the golf club which was integrally provided in the holder by making the hook correction fin into the same angle as the hook correction angle shown in FIG. It is a perspective view which shows the principal part of the golf club which is other embodiment of this invention. It is sectional drawing of FIG.

Explanation of symbols

10 Golf Club 11 Shaft 12 Head 13 Grip 14 Holder 24 Fin (Slice Correction Fin, Hook Correction Fin, Swing Correction Fin)
25 engaging portion 26 pressure receiving portion

Claims (4)

A golf club having a shaft, a club head provided at a tip portion thereof, and a grip provided at a base end portion of the shaft,
A holder that is positioned on the grip side of the club head and provided at the tip of the shaft;
Any slice correction range of 20 to 105 degrees opposite to the flying ball direction with the intersection of the reference line parallel to the club face and perpendicular to the central axis of the shaft and the outer peripheral surface of the holder on the player side as the reference point And a slice correcting fin provided on the holder protruding outward at the position of
A golf club characterized in that a force in a direction of closing the club face is applied to the shaft during swinging by the slice correcting fin. A golf club having a shaft, a club head provided at a tip portion thereof, and a grip provided at a base end portion of the shaft,
A holder that is positioned on the grip side of the club head and provided at the tip of the shaft;
Outward at any position in the hook correction range of 20 to 40 degrees in the flying ball direction with the intersection of the reference line parallel to the club face and perpendicular to the central axis of the shaft and the outer peripheral surface of the holder on the player side as the reference point And a hook correction fin provided on the holder protruding to
A golf club characterized in that a force for opening the club face is applied to the shaft during swing by the hook correcting fin. A golf club having a shaft, a club head provided at a tip portion thereof, and a grip provided at a base end portion of the shaft,
A holder that is positioned on the grip side of the club head and provided at the tip of the shaft;
Any slice correction range of 20 to 105 degrees opposite to the flying ball direction with the intersection of the reference line parallel to the club face and perpendicular to the central axis of the shaft and the outer peripheral surface of the holder on the player side as the reference point A slicing groove formed in the holder at the position of
A hook groove formed in the holder at any position within the hook correction range of 20 to 40 degrees in the flying direction from the reference point;
A swing correction fin that is attached to the slice groove and the hook groove so as to selectively detachably protrude from the holder;
The swing correction fin mounted in the slice groove applies a force in the direction of closing the club face to the shaft during swing, and the club face is opened on the shaft during swing by the swing correction fin mounted in the hook groove. A golf club characterized by applying a directional force. A golf club having a shaft, a club head provided at a tip portion thereof, and a grip provided at a base end portion of the shaft,
A holder that is positioned closer to the grip than the club head and is rotatably provided at the tip of the shaft;
A swing correction fin provided to protrude outward from the holder;
Any slice correction range of 20 to 105 degrees opposite to the flying ball direction with the intersection point of the reference line parallel to the club face and perpendicular to the center axis of the holder and the outer peripheral surface of the holder on the player side as the reference point And a fixing means for fixing the holder to the shaft in a state where the swing correction fin is positioned at any position within the hook correction range of 20 to 40 degrees in the flying ball direction from the reference point,
The swing correction fin set in the slice correction range applies a force in the direction of closing the club face to the shaft when swinging, and the club face is applied to the shaft in the swing by the swing correction fin set in the hook correction range. A golf club characterized by applying a force in a direction to open the door.

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