JP4676555B1 - Golf practice club - Google Patents

Abstract

Provided is a golf practice club that can be used optimally with both hands, with the sides tightened, and a swing using hip rotation.
A golf practice club has a striking portion having a striking surface formed at a predetermined position with respect to a reference surface, and a shaft portion extending from the striking portion in a predetermined direction along the reference surface. The first shaft portion 10 that is coaxially extended from the tip of the shaft portion 2, the second shaft portion 20 that is coaxially disposed at a predetermined distance from the tip of the first shaft portion 10, and the second shaft portion The base end of 20 and the tip of the first shaft portion 10 are connected, and the second shaft portion 20 is perpendicular to the reference surface 6 with respect to the first shaft portion 10 and perpendicular to the axial direction of the shaft portion 2. A flexible portion 30 that can be elastically deformed so as to bend toward the outside and a covering portion 3 that covers the outer periphery from the tip of the second shaft portion 20 including the flexible portion 30 to the tip of the shaft portion 2 are mainly provided.
[Selection] Figure 3

Description

  The present invention relates to a golf practice club for acquiring an ideal swing of golf.

  Conventionally, when practicing golf, they have read golf manuals and received instruction from lesson professionals. However, even after learning the theory by reading golf manuals, it was difficult to learn the ideal swing. In addition, lesson professional guidance costs instruction fees, and the practice time with guidance is limited due to the convenience of the instructor, etc., and there is a low degree of freedom to set effective practice time was there.

  Therefore, a holder that fixes the waist position of a user practicing golf, a circular guide loop that substantially matches the ideal swing path centered on the user supported by the holder, and a guide loop A golf practice device including a guided swing shaft has been proposed (for example, Patent Document 1). According to this training device, the user supported by the holder can forcibly perform an ideal swing by swinging the swing shaft.

  However, the thing of patent document 1 had the problem that the place for installing a training device was needed while the training device was large and expensive. In view of this, there has been proposed a swing shaft including an extension spring having a predetermined length and a compression spring having a predetermined length connected to the extension spring (for example, Patent Document 2). This exercise tool is designed to produce a specific sound by the expansion and contraction of the spring when the swing shaft is swung with an ideal swing. Yes.

By the way, as an ideal swing, not only do you swing by turning your hips with your side tightened, but also how to use both hands is important, and push your hand to the front of the impact of hitting the golf ball (right hand if right-handed) ), The pulling hand (left hand in the case of right-handed) is preceded and the pushing hand is gradually advanced after impact so as not to put too much force.
In other words, it is desirable to perform a swing such that the axes (also referred to as grip axes) of both hands holding the golf club are not bent but move straight on the same axis.

  However, in the conventional type, even if too much force is applied to the puller or pusher, the swing shaft does not bend and the grip axes of both hands are forcibly positioned on the same axis. It was difficult to know whether the situation was normal or not, and there was a problem of practicing with a non-ideal force. Therefore, even if the swing trajectory is an ideal trajectory, an ideal trajectory (flying distance) cannot be obtained when the golf ball is actually hit.

  SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a golf practice club that can be used optimally with both hands, can be constrained on the sides, and can acquire a swing using the rotation of the waist.

In order to solve the above-described problems, the golf practice club of the present invention includes a striking portion having a striking surface having a predetermined angle with respect to a reference plane perpendicular to the swing direction at a position where the ball is hit , and the striking portion. a shaft portion extending in a predetermined direction along the reference plane, the first shaft section Ru provided with a mounting portion at the distal end extending coaxially from a distal end of the shaft portion and a predetermined distance from the tip of said single portion away through a second shaft section Ru provided with a mounting portion disposed at the proximal end coaxially, a mounting member of each attachment is rod-like to the attachment portion of the second shaft portion and the first shaft portion, the mounting member Te It said second shaft portion of the connected proximal end and a distal end of the first shaft portion, and the axial direction of the shaft portion in the vertical direction of the second shaft portion is the reference plane relative to the first shaft portion Te It is elastically deformable to flex in the vertical direction with respect to said mounting member is inserted at both ends A plate-like first elastic member having a circular connecting hole and extending in the axial direction of the shaft portion in parallel with the reference surface, and disposed coaxially with the connecting hole of the first elastic member It is possible to provide at least one plate-like second elastic member having a long hole-like insertion hole extending in the axial direction of the shaft portion into which the attachment member is inserted and arranged in parallel with the first elastic member. A bending portion, a restriction means for restricting the amount of bending of the flexible portion by the end of the insertion hole in the longitudinal direction of the second elastic member coming into contact with the mounting member; And a covering portion that covers the outer periphery from the tip of the second shaft portion including the flexure portion to the tip of the shaft portion and forms a grip ”.

  Here, the reference plane is a plane orthogonal to the swing direction at the impact position where the golf ball is hit. The striking surface is a surface for striking a golf ball, and this striking surface has a predetermined angle (loft angle) with respect to the reference surface set for each type of club, and the hitting angle of the hit ball changes according to this loft angle. To do.

  Moreover, the 1st axial part should just be extended coaxially from the front-end | tip of a shaft part, and may be separate from a shaft part, or may be integral with a shaft part.

In addition, the flexible portion bends only in the direction perpendicular to the reference plane (also referred to as the swing direction) with respect to the shaft portion at the impact position, and when there is no load to be elastically deformed, the second shaft portion is moved to the first shaft. Ru der which is returned to the coaxial parts.

  Further, the connection of the flexible portion may be impossible or removable. If it is impossible to remove, the strength of the connecting portion can be improved and it can be made difficult to break. Moreover, when it can be removed, even if it is damaged, the damaged member can be replaced and repaired.

  The covering portion may be any member that forms a grip of the club by covering. For example, the covering portion is formed by covering a cylindrical shape with one end closed or by winding a tape shape. May be. Further, the material is preferably non-slip, and examples thereof include rubber, leather, and cloth. In addition, you may make it equip the surface of a coating | coated part with markings, such as a line which shows the position of a flexible part, and this makes it easy to understand the position of a flexible part with respect to a user, and correct position Can grip the covering (grip).

  When using the golf practice club of the present invention, the user uses the grip portion (grip) so that the flexible portion is positioned between the pulling hand and the pushing hand. And if you perform an ideal swing, the gripping shaft of each hand that grips the grip will move straight without being bent, so the flexible part will not bend, and it will swing smoothly without a sense of incongruity Can do. On the other hand, when a swing that is not ideal is performed, the gripping shaft of each hand bends and the flexible part bends due to excessive force applied to either hand, which makes the user feel uncomfortable. Can be given. As a specific example of the bending of the flexible part, for example, at the top position where the club is pulled up, the side is opened, so that the puller is inclined to the outside of the body or the club is swung down. In a downswing, if the pusher is too forceful, the pusher will be ahead of the puller, and after the impact, the pusher will tilt without being able to swing without using the hip rotation. The bending of the flexible part can cause the user to feel uncomfortable.

  In this way, if a swing that is not ideal is performed, the flexible part can bend and give the user a sense of incongruity. Therefore, the optimal use of both hands for the user (how to apply force and each hand) ), And the gripping shafts of both hands holding the grip can be swung in a straight line without bending, and at the same time the grips of both hands When the shaft is not bent and moved straight on the axis, the side of the user is naturally tightened and the hip rotation is used, and an ideal swing can be performed (confirmed).

  In the present invention, the striking portion having a striking surface corresponds to the head of a golf club, and has the same form as a general golf club. (Practical field) is not required, and it can be practiced anywhere by carrying it, and it is possible not only to swing but also to actually hit a golf ball. While practicing ideal power, you can practice.

  If the flexible part is not bent only in the swing direction, but is a flexible part that can be elastically deformed in any direction, it is difficult to hold the grip straight with only the pulling handle that holds the second shaft part. So it becomes difficult to practice an ideal swing. However, in the golf practice club of the present invention, since the flexible portion is flexed only in the swing direction, it is possible to hold the grip straight with only the puller in the posture with the club, and the puller with respect to the grip is straight. Since the correct position can be recognized, the grip can be grasped straight with both hands, and the above-mentioned problems can be solved.

  Therefore, according to the golf practice club of the present invention, since the grip has the flexible portion that is flexible only in the swing direction, the flexible portion bends when a non-ideal swing is performed, and the user feels uncomfortable. It is possible to make the user aware of the best use of both hands, and by practicing the swing so that the user does not feel uncomfortable, the use of both hands is optimal, the sides are tightened, and the waist rotation is used You can learn the ideal swing.

  Here, the restricting means may be any means that restricts the amount of bending of the second shaft portion relative to the first shaft portion. For example, “the first shaft portion and the second shaft portion are attachment members at the distal end and the proximal end, respectively. The flexible part has a circular connection hole into which the attachment member is inserted at both ends, and is arranged along the shaft part in a plate shape extending parallel to the reference surface. It has an elongated insertion hole extending in the axial direction of the shaft portion into which the elastic member and the mounting member arranged coaxially with the connection hole of the first elastic member are inserted, and is arranged in parallel with the first elastic member And at least one plate-like second elastic member, and when the flexible portion bends, the attachment member comes into contact with the end surface in the longitudinal direction of the insertion hole to restrict the bending. A hinge having an axis parallel to the reference plane and perpendicular to the axial direction of the shaft portion, and a coil disposed on the outer periphery of the hinge And a spring, the line between the coils may be a thing "flexure contacts is restricted shrinks inside of the coil spring when the flexible portion is bent.

  Therefore, according to the golf practice club of the present invention, by providing the restricting means, the amount of bending can be restricted when the force causing the bending more than allowable is applied, and the breakage of the flexible portion is prevented. be able to.

  Here, the attachment member is disposed so as to face a direction perpendicular to the axial direction of the first shaft portion and the second shaft portion. Further, the attachment portion may be in a shape to which the attachment member can be attached. For example, a hole having the same diameter as the attachment member is formed on the outer peripheral surface of the first shaft portion and the second shaft portion, or a screw hole for attachment May be formed.

  Further, a plurality of second elastic members may be arranged. For example, the first elastic member may be arranged on both sides of the first elastic member, or may be arranged only on one side of the first elastic member. Also good.

  Further, a plurality of connection holes may be formed, and may be formed according to the number of attachment members to be attached. In addition, at least two attachment members may be attached to one attachment portion, whereby the flexible portion can be prevented from rotating around the attachment member.

  The insertion hole is overlapped with the connection hole so that the connection hole is near the center in the longitudinal direction of the long hole. Thereby, when bending occurs in the flexible portion, the first elastic member and the second elastic member have different radii of curvature, so that the centers of the insertion hole and the connection hole are shifted in the longitudinal direction. Since the attachment member is coaxial with the connection hole, the attachment member can be slid relatively within the insertion hole, and the flexible portion can be bent.

  Therefore, according to the golf practice club of the present invention, the flexible portion is a plate-like elastic member, and the second shaft portion is perpendicular to the first shaft portion with respect to the first shaft portion with a simple configuration. In addition, the vertical direction (swing direction) can be set with respect to the axial direction of the shaft portion, and the number of components can be reduced as a flexible portion compared to a combination of a hinge and an elastic member.

  By the way, when bending occurs in the flexible part, as described above, the first elastic member and the second elastic member have different radii of curvature. In the insertion hole, the mounting member coaxial with the connection hole slides relatively. When the attachment member comes into contact with the end of the insertion hole, the attachment member can no longer slide, so the second elastic member cannot be bent (bend) any more, and the flexible portion is bent. The amount will be regulated. Therefore, according to the golf practice club of the present invention, as the restricting means, the amount of bending is regulated by the attachment member coming into contact with the longitudinal end of the insertion hole in the second elastic member. There is no need to provide a member as a means, the number of parts related to the golf practice club can be reduced, and the cost can be suppressed.

  As an effect of the present invention, it is possible to provide a golf practice club that can be used optimally with both hands, with the sides tightened, and a swing using the rotation of the waist.

It is a perspective view which shows the golf practice club which is one Embodiment of this invention. It is sectional drawing which expands and shows the principal part of the golf practice club of FIG. It is sectional drawing which shows the state which the flexible part bent in FIG. It is a perspective view which decomposes | disassembles and shows the principal part of the golf practice club of FIG. It is a perspective view which shows the other example of the golf practice club of this invention different from FIG.

  Hereinafter, a golf practice club 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. Here, FIG. 1 is a perspective view showing a golf practice club according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view showing a main part of the golf practice club of FIG. 1, and FIG. 2 is a cross-sectional view showing a state where the flexible portion is bent in FIG. 2, FIG. 4 is an exploded perspective view showing a main part of the golf practice club of FIG. 1, and FIG. 5 is a perspective view of the present invention different from FIG. It is a perspective view which shows the other example of a golf practice club.

  The golf practice club 1 of the present embodiment is for acquiring an ideal swing, and has a striking surface 5 formed at a predetermined position with respect to a reference surface 6 as shown in FIGS. A striking portion 4, a shaft portion 2 extending in a predetermined direction from the striking portion 4 along the reference surface 6, a first shaft portion 10 extending coaxially from the tip of the shaft portion 2, and the first shaft portion 10 A second shaft portion 20 that is coaxially disposed at a predetermined distance from the tip, and a base end of the second shaft portion 20 and a tip of the first shaft portion 10 are connected, and the second shaft portion 20 is the first shaft portion. 10, a flexible portion 30 that is elastically deformable so as to bend in a direction perpendicular to the reference plane 6 and perpendicular to the axial direction of the shaft portion 2, and a second shaft portion 20 including the flexible portion 30. The covering portion 3 that covers the outer periphery from the tip to the tip of the shaft portion 2, the first shaft portion 10 and the both ends of the flexible portion 30 A rod-shaped mounting member 33 for mounting the biaxial unit 20, those having a.

  As shown in FIGS. 1 and 2, the hitting portion 4 of the golf practice club 1 of this example has the same form as wood in the type of golf clubs that are generally used, and has an impact of hitting a golf ball. The striking surface 5 has a predetermined angle with respect to a reference surface 6 that intersects the swinging direction of the striking unit 4 at a position perpendicularly. Further, the shaft portion 2 of the golf practice club 1 of this example is a hollow shape with an open end, and the material is formed of carbon fiber reinforced resin (carbon graphite).

  The first shaft portion 10 of the golf practice club 1 of this example is a separate body from the shaft portion 2, and as shown in FIGS. 2 to 4, a cylindrical first shaft body 11 and a first shaft body 11 are formed. A cylindrical first shaft case 12 that is inserted inside and has an outer diameter substantially the same as that of the shaft portion 2 is provided. The first shaft main body 11 includes a groove-shaped first groove portion 13 having an opposed surface parallel to the reference surface 6 and having a distal end surface side open in the vicinity of the center of the distal end surface, which is an end surface far from the shaft 2, A pair of first mounting holes 14 that are formed so as to pass through the first shaft body 11 in the direction orthogonal to the reference plane 6 and pass along the longitudinal direction of the first shaft body 11 so as to pass through the groove portion 13. Yes. The first shaft part 10 is inserted and fixed to the tip of the hollow shaft part 2 at the other end opposite to the tip surface.

  As shown in FIGS. 2 to 4, the second shaft portion 20 of the golf practice club 1 includes a cylindrical second shaft main body 21 and a second shaft main body 21, as in the first shaft portion 10. And a cylindrical second shaft case 22 having an outer diameter substantially the same as that of the shaft portion 2. The second shaft main body 21 includes a groove-shaped second groove portion 23 having an opposite surface parallel to the reference surface 6 and having a base end surface open in the vicinity of the center of the base end surface, which is an end surface closer to the shaft 2, A pair of second mounting holes 24 that penetrate through the second shaft body 21 in the direction orthogonal to the reference surface 6 so as to pass through the groove portion 23 and are aligned in the longitudinal direction of the second shaft body 21. Yes. The second shaft portion 20 is disposed such that the second groove portion 23 faces the first groove portion 13.

  The flexible portion 30 of the golf practice club 1 has a pair of circular connecting holes 36 into which the mounting members 33 are inserted at both ends, as shown in FIGS. 2 to 4, and is parallel to the reference plane 6. An axial direction of the shaft portion 2 into which the first elastic member 31 arranged along the shaft portion 2 in the extended plate shape and the mounting member 33 arranged coaxially with the connection hole 36 of the first elastic member 31 are inserted. And a plate-like second elastic member 32 having three long hole-like insertion holes 37 extending to the opposite sides of the first elastic member 31. For this reason, the flexible portion 30 can be elastically deformed so that the second shaft portion 20 bends in the direction perpendicular to the reference surface 6 with respect to the first shaft portion 10 and in the direction perpendicular to the axial direction of the shaft portion 2. It can be done.

  The connection hole 36 and the insertion hole 37 are formed side by side in the longitudinal direction of the first elastic member 31 and the second elastic member 32 at both ends of the first elastic member 31 and the second elastic member 32, respectively. Is equal to the center distance between the first mounting hole 14 and the second mounting hole 24 formed in the first shaft body 11 and the second shaft body 21. When the second elastic member 32 is overlapped with the first elastic member 31, the connecting hole 36 is located near the center in the longitudinal direction of the insertion hole 37 that is a long hole. Accordingly, when the flexible portion 30 is bent, the radius of curvature is different between the first elastic member 31 and the second elastic member 32 as shown in FIG. However, since the insertion hole 37 has a long hole shape, the attachment member 33 coaxial with the connection hole 36 can slide relative to the insertion hole 37, and the flexible portion 30 can be moved. Can be bent.

  Further, the first shaft portion 10 and the second shaft portion 20 are connected to the flexible portion 30 in the first shaft body 11 by connecting the end portion of the first elastic member 31 to the first groove portion 13 and the first elastic member 31. The end portions of the second elastic members 32, which are three on each side, are inserted, and the pair of attachment members 33 are connected to each other by being inserted into the first attachment holes 14, the insertion holes 37, and the connection holes 36. . Similarly, in the second shaft body 21, the other end portion of the first elastic member 31 is overlapped with the second groove portion 23, and the other end portion of the second elastic member 32 is overlapped on both surfaces of the first elastic member 31. , And the pair of attachment members 33 are connected to each other by being inserted into the second attachment hole 24, the insertion hole 37, and the connection hole 36.

  In addition, the golf practice club 1 further includes a restricting unit that restricts the amount of bending of the second shaft portion 20 with respect to the first shaft portion 10. In the present embodiment, the first elastic member 31 and the second elastic member 32 have different radii of curvature, so that the centers of the insertion hole 37 and the connection hole 36 are shifted in the longitudinal direction, and are coaxial with the connection hole 36. The mounting member 33 slides relatively in the insertion hole 37, and the mounting member 33 contacts the end of the insertion hole 37 in the longitudinal direction to regulate the amount of bending. The flexible range in this embodiment is set to about 15 degrees with respect to the front and rear in the vertical direction of the reference surface 6.

  Further, the golf practice club 1 has a flat surface on the outer side of each of the second elastic members 32 stacked on both sides of the first elastic member 31 as shown in FIGS. A pair of semi-cylindrical spacers 34 arranged in such a manner and a coil spring 35 arranged around the flexible portion 30 are provided.

  The spacer 34 is formed of a resin material and has a length shorter than the distance between the opposing end surfaces of the first shaft main body 11 and the second shaft main body 21 and the radius of the curved surface is the first shaft portion 10 and the second shaft portion. The radius is smaller than 20.

  The coil spring 35 has an outer diameter that is substantially equal to the outer diameter of the first shaft case 12 and the second shaft case 22, and a wire diameter that is substantially equal to the thickness of the first shaft case 12 and the second shaft case 22. The coil spring 35 has a central axis of the coil spring 35 that is coaxial with the central axes of the first shaft portion 10 and the second shaft portion 20, and each end face of the first shaft case 12 and the second shaft case 22 facing each other. Both end surfaces of the coil spring 35 are in contact with. Since the spacer 34 is disposed inside the coil spring 35 in the gap with the second elastic member 32, the central axis is difficult to shift. Further, since the coil spring 35 is disposed on the outer periphery of the first elastic member 31 and the second elastic member 32, the plate-like first elastic member 31 and the second elastic member 32 that are not cylindrical are covered with the covering portion 3. Even if it maintains flexibility, the external shape of the coating | coated part 3 can be hold | maintained in a column shape.

  Further, as shown in FIG. 1, the covering portion 3 of the golf practice club 1 is formed of an elastic body such as a cylindrical rubber whose one end is closed. Is located at the tip of the shaft portion 2. Moreover, the coating | coated part 3 is adhere | attached on the outer periphery of the shaft part 2 with the adhesive agent apply | coated to the inner surface of the opening side, and the covering state does not shift | deviate easily.

  The mounting member 33 of the golf practice club 1 is shorter than the shaft diameters of the first shaft body 11 and the second shaft body 21 as shown in FIGS. 2 to 4, and the first mounting hole 14 and the second mounting hole 24. When inserted into the cylindrical body, it is formed in a columnar shape with a length that does not protrude from the outer periphery of the first shaft body 11 and the second shaft body 21.

  Incidentally, the position of the flexible portion 30 in this embodiment is such that the center of bending is a position of about 110 cm from the tip (grip end) of the second shaft portion 20. Moreover, the thickness of the 1st elastic site | part material 31 and the 2nd elastic member 32 is about 0.5 mm, and the full length of a longitudinal direction is about 60 mm. Further, the distance between the first shaft portion 10 and the second shaft portion 20 is about 25 mm. The insertion amounts of the first elastic member 31 and the second elastic member 32 into the first groove 13 and the second groove 23 are about 17.5 mm, respectively. The total length of the coil spring is about 11 mm, and the wire diameter is 0.5 mm.

  When using the golf practice club 1 of this example, the user uses the covering portion 3 (grip) so that the flexible portion 30 is positioned between the pulling hand and the pushing hand. When the ideal swing is performed, the gripping shafts of both hands holding the golf practice club 1 move straight without being bent, so that the flexible portion 30 does not bend and is smooth without a sense of incongruity. Can swing to. On the other hand, when a non-ideal swing is performed, the gripping shaft of each hand is bent and the flexible portion 30 is bent due to excessive force applied to either hand, so that the user feels uncomfortable. Can be given.

  As described above, according to the golf practice club 1 of the present embodiment, since the grip has the flexible portion 30, the flexible portion 30 bends when a non-ideal swing is performed, and the user can feel uncomfortable. It is possible to make the user aware of the best use of both hands, and by practicing swing so that the user does not feel uncomfortable, the use of both hands is optimal, the sides are tightened, and the ideal using the rotation of the waist Thus, it is possible to provide the golf practice club 1 capable of acquiring a typical swing.

  In addition, according to the golf practice club 1 of the present embodiment, the flexible portion 30 is formed into the plate-like first elastic member 31 and the second elastic member 32, so that the second shaft portion 20 can be bent in a simple configuration. The first shaft portion 10 can be perpendicular to the reference plane 6 and perpendicular to the axial direction of the shaft portion 2, and the flexible portion 30 is a combination of a hinge and an elastic member. In comparison, the number of parts can be reduced.

  In addition, according to the golf practice club 1 of the present embodiment, the hitting part 4 having the hitting surface 5 is provided, and since it has the same form as a general golf club, there is no need for an installation place (practice field). It can be practiced anywhere by carrying it, and it can be used not only for swinging, but also for actually hitting a golf ball, and for practicing ideal power while checking the trajectory.

  In addition, according to the golf practice club 1 of the present embodiment, since the flexible portion 30 is provided with the restricting means, the amount of deflection can be regulated when a force that causes an excessive deflection is applied, and the flexible portion 30 can be regulated. Can be prevented from being damaged. Furthermore, in this case, since it can be regulated without a separate member as a regulating means, the number of parts can be reduced, and it can be manufactured at low cost. In this example, since the shaft portion 2 is made of carbon fiber reinforced resin, the first shaft portion 10 and the second shaft portion 20 are replaced with the first shaft body 11 and the first shaft case 12 and the second shaft body 21. Although what was comprised by the 2nd axis | shaft case 22 was shown, it is not limited to this, The shaft part 2 is good also as metal, such as steel and aluminum, Thereby, the 1st axis | shaft main body 11 or Since the thing equivalent to the 2nd axis | shaft main body 21 can be formed directly, the number of parts which comprise the golf practice club 1 can further be reduced, and it can manufacture more cheaply.

  Moreover, according to the golf practice club 1 of this embodiment, since the coil spring 35 is arrange | positioned on the outer periphery of the 1st elastic member 31 and the 2nd elastic member 32, the flexible part 30 is plate-shaped 1st elastic member 31 and Even if it is the 2nd elastic member 32, it becomes possible to hold | maintain the external shape of the coating | coated part 3 in a column shape, maintaining flexibility, and can grip a grip without a sense of incongruity compared with a general golf club. .

  The present invention has been described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention as described below. And design changes are possible.

  That is, in the golf practice club 1 of the present embodiment, the first shaft portion 10 is shown as a separate body between the first shaft body 11 and the first shaft case 12, but is not limited thereto. It may be one. Further, the first shaft portion 10 and the shaft portion 2 may be integrated.

  Moreover, although the golf practice club 1 of this embodiment showed what set the flexible range of the flexible part 30 to about 15 degree | times, it is not limited to this, About 10 degree | times-about 20 degree | times Set it within the range. If it is less than this, it is difficult for the user to recognize the bending, and if it is more than this, the gripping shafts of both hands are too broken, making it difficult to practice swinging.

  Moreover, although the golf practice club 1 of this embodiment showed what piled up the 3nd each of the 2nd elastic member 32 on the both surfaces of the 1st elastic member 31 as the flexible part 30, it is not limited to this. What is necessary is just to have durability against the load of the swing and to have an elastic force that immediately returns the second shaft portion 20 to the coaxial shape of the first shaft portion 10 after bending.

  Moreover, although the golf practice club 1 of this embodiment showed what the coating | coated part 3 was formed with elastic bodies, such as rubber | gum, it is not limited to this, For example, it is hard to slip | slide cloth, leather, etc. Anything is fine. Also, the shape may be formed by winding a tape.

  Moreover, although the golf practice club 1 of this embodiment showed what was not drawing on the surface of the coating | coated part 3, it is not limited to this, As shown in FIG. A marking 7 indicating the position of the flexible portion 30 may be provided. The marking 7 is formed by drawing a line on the surface of the covering portion 3 or attaching a tape.

  Moreover, although the golf practice club 1 of this embodiment showed that the 1st groove part 13 and the 2nd groove part 23 formed in the groove shape in the center vicinity of the end surface of the 1st shaft main body 11 and the 2nd shaft main body 21, although it showed. However, the present invention is not limited to this, and it may be formed in a semi-cylindrical shape obtained by scraping half of a cylinder. In this case, since the position of the first elastic member 31 and the second elastic member 32 in one of the overlapping directions is not limited by the first groove portion 13 and the second groove portion 23, for example, the attachment member 33 is connected to the first attachment hole 14. Alternatively, the position may be limited as a cylindrical shape with a flange extending from the second mounting hole 24 or as a screw member such as a bolt.

  In addition, although the golf practice club 1 of this embodiment mentioned above showed what gives an uncomfortable feeling to a user's both hands by the bending of the flexible part 30, for example, the pronunciation which emits a sound simultaneously with the flexible part 30 bending. You may provide a means. By providing sound generation means, it is possible to make the both hands gripping the golf club bend with a sense of incongruity with both hands, and to recognize the position bent in the swing more easily. Can do.

  Further, the configuration (mechanism) shown in the golf practice club 1 described above may be applied to a baseball bat or a tennis racket. For example, when applied to a baseball bat, the side is tightened and the swing using the rotation of the waist is used. In other words, you can practice a swing that strengthens the inner sphere. In addition, when applied to a baseball bat, it is desirable to further include a marking indicating the bending direction (swing direction) of the flexible portion 30, whereby the swing practice can be performed correctly.

DESCRIPTION OF SYMBOLS 1 Golf practice club 2 Shaft part 3 Cover | cover part 4 Hitting part 5 Hitting surface 6 Reference surface 10 1st axial part 11 1st axial main body 14 1st attachment hole 20 2nd axial part 21 2nd axial main body 24 2nd attachment hole 30 Flexible portion 31 First elastic member 32 Second elastic member 33 Mounting member 36 Connection hole 37 Insertion hole

JP 11-99233 A JP 2007-275167 A

Claims (1)

A striking portion having a striking surface at a predetermined angle with respect to a reference surface perpendicular to the swing direction at a position where the ball is hit ;
A shaft portion extending in a predetermined direction along the reference surface from the striking portion;
A first shaft section Ru provided with a mounting portion at the distal end extending coaxially from a distal end of the shaft portion,
A second shaft section Ru provided with a mounting portion coaxially disposed proximal a predetermined distance away from the tip of said single unit,
Rod- shaped attachment members respectively attached to the attachment portions of the second shaft portion and the first shaft portion;
The base end of the second shaft portion and the tip end of the first shaft portion are connected via the mounting member, and the second shaft portion is perpendicular to the reference plane with respect to the first shaft portion and the It is elastically deformable so as to bend in a direction perpendicular to the axial direction of the shaft portion, has circular connection holes into which the mounting members are inserted at both ends, and extends in the axial direction of the shaft portion in parallel with the reference plane. A plate-like first elastic member, and an elongated insertion hole extending in the axial direction of the shaft portion into which the attachment member arranged coaxially with the connection hole of the first elastic member is inserted. A flexible portion including at least one plate-like second elastic member disposed in parallel with the first elastic member ;
Restricting means for restricting the amount of bending of the flexible portion by the end of the insertion hole in the longitudinal direction of the second elastic member coming into contact with the mounting member;
A golf practice club comprising: a covering portion that covers the outer periphery from the tip of the second shaft portion including the restricting means and the flexible portion to the tip of the shaft portion to form a grip .

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