Swing training equipment for swing sports

Abstract

To provide a swing training tool that allows a trainee to physically feel and perceive a basic proper swing state and acquire a proper swing in a free swing state without mechanically restraining the trainee's body. [Solution] This problem-solving means comprises a spherical portion that contacts the gluteus maximus muscle of the buttocks of the practicer, allowing the practicer to always be aware of the correct position of the buttocks, an elastic support member that supports the spherical portion so that it can swing circumferentially with a predetermined elasticity to return to its original position, and a support body that supports the spherical portion at a predetermined height via the elastic support member.The swinging and rebound elasticity of the spherical portion are used to make the spherical portion smoothly follow the movement of the body, allowing the practicer to swing while always feeling and perceiving the correct position of the buttocks in a completely free swing state that does not restrict any part of the body, thereby enabling more effective improvement than ever before.

Description

[Technical Field]

[0001] The invention of this application relates to the configuration of a swing training device for swing sports that require swinging. [Background technology]

[0002] Some sports, such as golf, baseball, and tennis, require players to swing a club, bat, racket, or other implement. In all sports requiring swings (hereafter referred to as swing sports), there is a common, fundamental, correct way to swing, and it is difficult to improve unless you master this fundamental, correct swing (how to hit the ball = form).

[0003] For example, in the case of golf, the basic swing form consists of the following six swing movements: (1) Address (the stance when hitting the ball) (2) Backswing (swinging the club back) (3) Downswing (swinging the club head down toward the ball) (4) Impact (the instantaneous movement of the club head hitting the ball) (5) Follow-through (movement after hitting the ball) (6) Finish (the state in which the club is stationary after swinging) The address (1), which involves positioning the club before swinging, is an extremely important first action that affects the impact point and ball direction. Pay attention to the ball's position, stance width, center of gravity, grip, hand position, forward lean, the three lines between the toes, knees, and shoulders, and the position of the hanging arms. The trick is to slightly bend your knees and tilt your upper body slightly toward the ball to lower your center of gravity. Specifically, from an upright position with your back straight, you lean forward, imagining that you are tilting your pelvis from your hip joints, and slightly bend your knees, but it's important to keep your back straight.

[0004] The backswing (2) involves swinging the club backward, but whether this movement is correct or not will greatly affect the club's trajectory during the swing. During the take-back, keep the club head parallel to the ground and, in the forward-leaning posture at address described above, pull it back as you rotate your pelvis. At this time, maintain the triangle formed by your shoulders and the grip until you reach the business zone (the range until the shaft is parallel to the ground). Then, from the business zone to the top, be careful not to let your body axis drift in the direction of the swing. During this time, the important thing is not to move your center of gravity to the right, but rather to imagine twisting your pelvis around your right hip joint as you take the club back.

[0005] (3) During the downswing, while paying attention to the direction of the club face, swing the club down in an arc (inside-in) with a moderate acceleration from the peak of the backswing. During this time, it is desirable to keep the position of the pelvis (height and horizontal position in the front, back, left, right and left directions) constant and to swing the club down with the image of twisting the pelvis.

[0006] At impact (4), swing down so that your hands are in the same position as when you addressed the ball. From the backswing to the impact, keep your eyes on the ball. Also, keep your pelvis in the same position as when you addressed the ball. This will allow you to achieve an accurate arc of rotation at impact.

[0007] In the follow-through (5), rotate your hips firmly, stretch both hands straight out holding the club, and swing through with a large swing. In this case, do not look up immediately after impact, but maintain your previous forward leaning posture and continue to look at where the ball was as you swing through. Even with this follow-through, if you are within the business zone, you can achieve a dynamic follow-through by extending both arms straight out while maintaining the triangle described above. In this case, as with the backswing above, do not let your body move in the direction of the club's swing (make sure your body does not move in the direction of the club's swing from a straight line drawn vertically upward from the outside of your left foot), and swing through with the image of rotating your hips backward. This stabilizes the direction of the ball.

[0008] In the finish of (6), the player finishes swinging the club with the sole of the right foot visible, and the center of gravity of the body is entirely on the left foot, and the body comes to a standstill facing straight toward the target. Then, the player turns their gaze in the direction of the ball's flight.

[0009] If you can properly master each of these forms (1) to (6), your score will improve and you will be able to enjoy your round with confidence.

[0010] However, these swing movements, which require maintaining the pelvic position as it was at address in (1) throughout each of these movements (1) through (6), and swinging the club up and down with the image of twisting the pelvis during the backswing in (2) and the downswing in (3), rotating the hips firmly during the follow-through in (5), extending both arms holding the club straight and swinging through, without letting the body flow in the direction of the club's swing, just as in the backswing (2), are not easily mastered by simply repeating practice swings. This is because, when simply practicing swings, you are merely repeating the swing based on an image (imagination) in your head, without accurately recognizing (feeling or perceiving) the actual position of your pelvis (hips) during the swing.

[0011] Therefore, recently, a golf swing training device has been proposed in which a saddle that can be rotated horizontally as desired is attached to the top of a support post whose height can be adjusted in the vertical direction, and the trainee places their crotch area against the saddle and performs the actions (1) to (6) above, allowing them to practice swings with the actual position of the pelvis mechanically fixed (see Patent Document 1).

[0012] In the case of this swing training device, swing training is carried out roughly as follows.

[0013] That is, the golfer first stands astride the saddle with the club in hand and assumes the address stance with the crotch resting on the saddle. The saddle height is set appropriately in advance according to the golfer's physique so that the golfer can assume the address stance (address stance) with the knees slightly bent and the upper body slightly tilted toward the ball with the center of gravity lowered. Then, as the golfer moves into the backswing, the weight shift causes the upper support supporting the saddle to rotate a predetermined angle relative to the lower support. Furthermore, by twisting the hips, the saddle also rotates a predetermined angle relative to the upper support. When the golfer reaches the top of the backswing, the upper support is rotated 45 degrees relative to the lower support.

[0014] Next, during the downswing, the saddle returns to its original position relative to the upper support, and the upper support also returns to its normal position relative to the lower support. At impact, only the upper support is rotated a predetermined angle relative to the lower support. Then, from the latter half of impact to the finish, when the hips are moved in parallel toward the finish while maintaining the hip axis, a slide mechanism is further provided, which slides the upper support relative to the lower support, allowing the hips to move toward the finish.

[0015] Therefore, with this configuration, it is possible to perform swing movements corresponding to each of the forms (1) to (6) described above.

[0016] However, in the case of this swing training device, there is a large mechanical structure (mechanism) consisting of a saddle, upper support, slide mechanism, lower support, legs, etc., and the crotch area (lower back) is constantly mechanically restrained and guided via each part of the structure, such as the saddle, upper support, lower support, and slide mechanism, to swing, and it is only when each part mechanically works together that a series of swings can be realized.

[0017] Therefore, in the case of a swing training device with the same configuration, even if you can swing to a certain extent while practicing with the swing training device, it is difficult to swing in the same way when you remove the training device. In other words, since it does not allow the body to sense and perceive the proper swing, the mastery effect is low.

[0018] Furthermore, even during practice, the entire body, including the groin area, feels tightly constrained, making it impossible to practice swinging freely. A poor full swing can lead to injury. Therefore, practicing hitting a ball is difficult, and no beneficial training effect can be expected. Furthermore, the device configuration is complex, the product is expensive, and it is inconvenient to carry around.

[0019] On the other hand, an extremely simple swing training device has also been proposed, which has a stick structure consisting of a small diameter seat portion that is positioned at the center of the user's buttocks, a support portion that extends downward from the center of the seat portion, and legs at the lower end of the support portion (see Patent Document 2).

[0020] In this swing training device, the training device is held upright from the ground with the seat facing up, and the trainee places the center of their buttocks lightly on the seat, bends their knees, lowers their hips, and assumes a forward-leaning posture. Then, in this position, they perform various swing movements ((1) to (6) above), such as the address motion of golf, the backswing from the address motion, the downswing from the backswing, the impact from the downswing, the follow-through from the impact, and the finish from the follow-through. In each of these movements, the stick-structured training device is held between the buttocks and the ground to prevent it from tipping over. Then, in this position, the trainee rotates their hips around their navel and anus (the axis of the support part) as the rotation axis, twisting their upper body. If the trainee's weight is properly shifted, the training device (the support part) will tilt from one side to the other without tipping over. On the other hand, if the trainee's weight is not properly shifted, the training device (the support part) will tip over. Therefore, it is possible to determine whether the trainee is properly shifting their weight during the swing.

[0021] Furthermore, with this training device, users can swing and shift their weight relatively freely while maintaining balance in the knees, hips, and upper body, so there is no mechanical restraint like with the training device in Patent Document 1, and they can practice by letting their body memorize the swing without relying on mechanical guides. Furthermore, even with full swings, injuries are relatively unlikely. Furthermore, because it is merely a stick structure with a small diameter seat, support posts, and legs, its structure is extremely simple and its manufacturing costs are low. [Prior art documents] [Patent documents]

[0022] [Patent Document 1] Actual application number 5-19090 (actual application number 01-124478) [Patent Document 2] Patent Publication No. 2022-26590 (Patent No. 7257690) Summary of the Invention [Problem to be solved by the invention]

[0023] However, in the case of the training device of Patent Document 2, it is difficult to hold the stick-structured training device between the buttocks and the ground and keep it from falling over, and until one is accustomed to it, it is almost impossible to shift one's weight properly, and the training device falls over with every swing. Furthermore, even if one improves to a certain extent, the legs slip and the device falls over. Therefore, training requires a great deal of perseverance and cannot be said to be practical.

[0024] Furthermore, even if you can make a full swing, you have to put a certain amount of weight on the seat to prevent the training equipment from tipping over, which takes up half of your attention. Therefore, it is impossible to make a free swing where you can concentrate completely on the swing. Therefore, there is a natural limit to how much you can improve your swing technique.

[0025] Furthermore, even though this training device has a seat, the position of the seat is ultimately maintained by the trainee, so the seat does not indicate the proper buttocks position for each swing. The same is true for maintaining the forward lean angle when leaning forward and for weight transfer. In short, this training device is nothing more than an extremely approximate device that simply assumes that the swing and weight transfer are correct as long as the device does not tip over.

[0026] The invention of this application has been made to solve such problems, and aims to provide a swing training device for swing sports that allows the body of the practitioner to feel and perceive the basic correct swing state without mechanically restraining the body of the practitioner, and allows the practitioner to acquire the correct swing form in a completely free swing state. [Means for solving the problem]

[0027] In order to solve the above problems, the invention of this application is configured to include the following means for solving the problems.

[0028] (1) Means for solving the problem of the invention of claim 1 The means for solving the problem of the invention of claim 1 is characterized by comprising a spherical portion that abuts against the gluteus maximus muscle of the buttocks of the practicer, allowing the practicer to always be aware of the correct position of the buttocks, an elastic support member that supports the spherical portion so that it can swing circumferentially with a predetermined elasticity to return to its original position, and a support body that supports the spherical portion at a predetermined height via the elastic support member, and by utilizing the swing and rebound elasticity of the spherical portion to make the spherical portion smoothly follow the movement of the body, allowing the practicer to always experience and perceive the correct position of their buttocks in a completely free swing state that does not restrict any part of the body.

[0029] The problem-solving means of this invention is composed of a spherical portion that abuts against the gluteus maximus muscle of the buttocks of the practicer, allowing the practicer to always be aware of the correct position of his or her own buttocks, an elastic support member that supports the spherical portion so that it can swing circumferentially with a predetermined elasticity to return to its original position, and a support body that supports the spherical portion at a predetermined height via the elastic support member, and by utilizing the swinging and rebound elasticity of the spherical portion, the spherical portion is made to smoothly follow the movement of the body, allowing the practicer to always experience and perceive the correct position of his or her own buttocks in a completely free swing state that does not restrict any part of the body, while practicing swinging.

[0030] That is, in this swing training device, when a user presses the left and right gluteus maximus muscles of the buttocks against the spherical portion, which is supported with a predetermined spring pressure so as to be freely swingable in the circumferential direction, the spherical portion presses against the left and right gluteus maximus muscles with a predetermined rebound stress corresponding to the spring pressure of the elastic support member. The tactile and pressure-sensing nerves in the skin on the surface of the left and right gluteus maximus muscles detect the contact of the spherical portion with the left and right gluteus maximus muscles and the pressure applied with the predetermined rebound stress, respectively, and the brain is reliably notified via the nervous system that the spherical portion is contacting the left and right gluteus maximus muscles with the predetermined pressure and that the contact position has changed. The contact of the spherical portion with the left and right gluteus maximus muscles and the pressure applied with the predetermined rebound stress are sufficient for both nerves in the skin to sense, and do not necessarily require a strong pressure. Therefore, although the spherical portion is in contact with the left and right gluteus maximus muscles of the buttocks during a swing, the spherical portion does not mechanically restrict the movement of the left and right gluteus maximus muscles, hip joints, or pelvis. It simply allows its presence to be sensed through the nerves in the skin.

[0031] Therefore, the trainee can swing freely as if he were simply practicing. Moreover, such a full swing will not cause injury as with conventional training devices. Therefore, he can actually hit the ball with all his might.

[0032] Moreover, the gluteus maximus muscles on both sides of the buttocks can sense the position of the ball during the swing, and the brain accurately recognizes the position of the buttocks and gluteus maximus muscles based on the position of the ball. Therefore, with this training tool, a basic swing form can be acquired reliably by essentially just practicing swings without being guided by any mechanical guide means, and the training effect is extremely high.

[0033] Furthermore, due to its shape and elasticity, the spherical portion follows the movements of the gluteus maximus muscles on both sides during the swing, allowing the cerebrum to properly recognize the actual movements of these muscles. The gluteus maximus is the largest muscle in the buttocks and is located on the surface of the buttocks. Working in conjunction with the hamstrings (biceps femoris, etc.) on the back of the thigh, it contributes to motor movements such as hip extension, external rotation, adduction, and abduction. The skin covering the gluteus maximus contains nerves that control the sense of touch (Merkel's disk) and the sense of pressure (Pacinian corpuscles). Therefore, even if the position of the hips or forward lean at address is not appropriate, differences in the contact sensation and contact position of the spherical portion can easily be detected, allowing for autonomous corrections during the swing. This leads to rapid improvement.

[0034] In order to effectively realize this function, it is preferable to address the spherical portion by abutting it against the center of the gluteal cleft (anal area) formed between the left and right gluteus maximus muscles.

[0035] (2) Means for solving the problem of the invention of claim 2 The means for solving the problems of the invention of claim 2 is characterized in that, in the configuration of the means for solving the problems of the invention of claim 1, the spherical part is made of a ball member in which air at a predetermined pressure is sealed inside.

[0036] In this configuration, the entire spherical portion is soft, highly elastic, and easily deformable, so it easily follows the movements of the gluteus maximus muscles on both sides of the body during a swing, allowing the player to more effectively recognize movements such as the rotation of the waist.

[0037] (3) Means for solving the problem of the invention of claim 3 The problem-solving means of the invention of claim 3 is characterized in that, in the configuration of the problem-solving means of the invention of claim 1 or 2 above, the surface of the spherical portion is provided with a specified convex portion that makes it easy to sense the state of contact with the gluteus maximus part of the buttocks.

[0038] In this configuration, the spherical portion, which comes into indirect contact with the skin on the surface of the gluteus maximus muscle of the buttocks through the fabric of clothing such as trousers, can be sensed more sensitively by the tactile and pressure senses of the skin.

[0039] (4) Means for solving the problem of the invention of claim 4 The means for solving the problem of the invention of claim 4 is as follows: 1 or 2 In the configuration of the means for solving the problems of the invention, the elastic support member is characterized in that it is supported by the support body via a predetermined height adjustment member.

[0040] Practitioners vary in height and leg length. As a result, the height of the hips and the position of the buttocks at address vary from person to person. Therefore, the elastic support member that supports the spherical part is supported on the support body via a predetermined height adjustment member.

[0041] With this configuration, it is possible to always set an appropriate spherical portion position according to the physique of the exerciser.

[0042] (5) Means for solving the problem of the invention of claim 5 The solution to the problem of the invention of claim 5 is characterized in that, in the configuration of the solution to the problem of the invention of claim 4 above, the upper part of the height adjustment member is bent forward at a predetermined angle in accordance with the forward leaning posture during the swing.

[0043] With this configuration, the spherical portion and the elastic member supporting the spherical portion extend in a straight line, leaning forward at a predetermined angle in accordance with the forward leaning posture of the practitioner during the swing, and the practitioner can adopt a forward leaning posture based on this forward leaning line, thereby achieving an accurate forward leaning posture.

[0044] In addition, the center of the sphere extends toward the anus in the center of the gluteal cleft between the two gluteus maximus muscles, allowing for more appropriate adaptation. Also, during the swing, the sphere can more freely follow the displacement of the two gluteus maximus muscles. [Effects of the Invention]

[0045] As a result of the above, the swing training device for swing sports of the invention of this application makes it possible to obtain a far more effective effect of mastering the basic swing form in swing training for swing sports such as golf, baseball, and tennis, which require mastering the basic swing form, without causing the problems described in Patent Documents 1 and 2. [Brief explanation of the drawings]

[0046] [Figure 1] 1 is a front view showing the configuration of a swing training device for swing sports (hereinafter simply referred to as a swing training device) according to an embodiment of the present invention. [Figure 2] FIG. 2 is a top view showing the configuration of the swing training device. [Figure 3] 10 is a top view showing the rotation of the training tool body relative to the training tool body support means in the swing training tool. FIG. [Figure 4] 1 is an anatomical diagram showing the structure of the gluteus maximus muscle in the back side of the buttocks of a practicer (human body) A, to which the spherical part of the swing training device corresponds. [Figure 5] FIG. 2 is a side view showing an address motion when practicing a golf swing using the swing training device. [Figure 6] FIG. 10 is a side view showing the start of the take-back motion when the club moves from the address motion to the backswing and begins to swing back. [Figure 7] FIG. 10 is a side view showing the action during take-back in the backswing. [Figure 8] FIG. 10 is a side view showing the movement after the take-back is completed in the backswing. [Figure 9] FIG. 10 is a top view showing the movement after the take-back is completed in the backswing. [Figure 10] FIG. 10 is a side view showing the movement from the state after the take-back in the backswing to the start of the downswing. [Figure 11] FIG. 10 is a side view showing the action at the time of impact following the swing-down action of the club. [Figure 12] FIG. 10 is a side view showing the movement of transitioning to a follow-through after impact. [Figure 13] FIG. 10 is a side view showing the follow-through motion after impact. [Figure 14] FIG. 10 is a side view showing the finishing movement after the follow-through. [Figure 15] FIG. 10 is a front view similar to FIG. 1, showing the configuration of a training device main body of a swing training device according to a third modification of the above embodiment. [Figure 16] FIG. 10 is a front view similar to FIG. 1, showing the configuration of a training device main body of a swing training device according to a fifth modification of the above embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0047] Hereinafter, first, with reference to Figures 1 to 3, the configuration of a swing training device for swing sports according to a form for implementing the invention of this application will be described in detail, then with reference to Figure 4, the parts of the human body structure to which the swing training device is applied will be described, and further with reference to Figures 5 to 14, a method of practicing a swing using the swing training device will be described in detail using golf as an example.

[0048] 1 to 3 show the configuration of a swing training device according to an embodiment of the present invention. The swing training device according to this embodiment is configured as a swing training device (hereinafter simply referred to as training device) suitable for practicing a golf swing, as an example.

[0049] As shown in Figure 1 (front view) and Figure 2 (top view), the training device is composed of a spherical portion 1, an elastic support member 2 of a predetermined length that supports the spherical portion 1 so that it can swing with a restoring elasticity above a predetermined level, a height adjustment member 3 of a predetermined length that supports the height of the spherical portion 1 at a predetermined height via the elastic support member 2, a support body 4 of a predetermined length that inserts and supports the height adjustment member 3 so that it can slide up and down, a height adjustment member fixing means 5 that fixes the height adjustment member 3 inserted into the support body 4 at a predetermined height position, a support plate 6 of a predetermined larger diameter than the support body 4 that supports the support body 4 in a stable upright state (vertical upright state) on a predetermined installation surface, and a connecting member 7 of a predetermined length that extends horizontally from the side of the lower end 4b of the support body 4 and a training device body support means (fixing means) 9 connected via a rotating member 8 perpendicular to the connecting member 7.

[0050] In this embodiment, the spherical portion 1 is formed of a soft, elastic ball member, for example, a rubber outer shell (synthetic rubber outer shell) of a predetermined thickness, with air sealed inside at a predetermined pressure. In this embodiment, as an example, the outer peripheral surface of the rubber outer shell is formed to be a smooth surface without any irregularities as a whole. As shown in Fig. 4, for example, during golf swing practice (Figs. 5 to 14), the spherical portion 1 is used in a state where it abuts against the center of the intergluteal cleft between the left and right gluteus maximus muscles (anal area) of the groin region of the backside buttocks (backside buttocks of the pelvis) of a practicer (human body) A. Therefore, a spherical portion 1 having an appropriate outer diameter corresponding to the dimensions of the recessed space in the center of the intergluteal cleft between the left and right gluteus maximus muscles is adopted.

[0051] As described above, the elastic support member 2 is used in a state in which the spherical portion 1 is in contact with the area between the left and right gluteus maximus muscles of the back side buttocks of the groin region of the practicer with a predetermined contact pressure during swing practice, and therefore is an elastic shaft member of a predetermined diameter and length that supports the spherical portion 1 swingably with a predetermined level of restoring elasticity (spring characteristics) or more, and in this embodiment, the elastic shaft main body is molded from an elastic rubber material (natural rubber or synthetic rubber) with a relatively high viscosity and a solid cylindrical structure. The diameter of the upper end 2a is gradually larger than that of the lower end 2b, and the convex spherical bottom portion of the spherical portion 1 is joined integrally to the concave spherical upper surface of the upper end 2a, while the upper end 3a of the height adjustment member 3 is inserted and fitted by a predetermined length into the lower end 2b, which has a gradually smaller diameter, so that the two are connected and fixed to each other.

[0052] The height adjustment member 3 is made of a metal member with a solid cylindrical structure having a predetermined length in the vertical direction, and its lower end portion 3b is inserted into the height adjustment member insertion hole 4c portion of the support body 4 described below in a state where it can slide up and down.

[0053] The support body 4 has a metallic cylindrical structure of a predetermined length, and is provided on the inside with a height adjustment member insertion hole 4c into which the cylindrical height adjustment member 3 is inserted so as to be slidable up and down. The cylindrical height adjustment member 3 is inserted and supported as shown in the figure. A height adjustment member fixing means 5 is provided on the side of the upper end 4a of the support body 4, which fixes the height adjustment member 3 at a predetermined height position (predetermined insertion position) by pressing and fixing the side of the height adjustment member 3 inserted into the height adjustment member insertion hole 4c.

[0054] The height adjustment member fixing means 5 is screwed inward in the perpendicular direction through a perpendicular screw hole (symbol omitted) provided in the side wall of the upper end 4a of the support main body 4, and has a screw shaft 5a of a predetermined length that presses its tip side pressing portion against the shaft portion of the height adjustment member 3 inserted from above, and is screwed and fixed by rotating the screw shaft 5a with a rotating operating portion 5b of a predetermined outer diameter.

[0055] Therefore, the height adjustment member 3 is slid up and down so that the spherical portion 1 is at a height position corresponding to the gluteus maximus of the buttocks of the practicer in the proper address posture (see Figure 5), and once this position is reached, the height adjustment member fixing means 5 is operated to fix the height adjustment member 3. This sets the spherical portion 3 at an appropriate buttocks height position (the center position of the intergluteal fissure between the left and right gluteus maximus) at address according to the practicer's physique.

[0056] That is, in this embodiment, the height adjustment member 3, the support body 4 having the height adjustment member insertion hole 4c, and the height adjustment member fixing means 5 cooperate with each other to form the height adjustment means of the spherical portion 3.

[0057] The training tool body support means 9, which is connected to the side of the lower end 4b of the support body 4 via a connecting member 7 of a predetermined length extending horizontally and a rotating member 8 perpendicular to the connecting member 7, functions to reliably maintain the training tool body, which is set on a predetermined installation surface via a support plate 6 at the bottom of the support body 4 and is composed of the spherical portion 3, elastic support member 2, height adjustment member 3, and support body 4, in an upright position without tipping over. Meanwhile, the training tool body, which is set on a predetermined installation surface via the support plate 6 and is composed of the spherical portion 3, elastic support member 2, height adjustment member 3, and support body 4, is connected to the support plate 6 so as to be freely rotatable in 360 degrees around the rotation support shaft 8a of the rotating member 8, as shown by the two-dot chain line (rotation locus) in Fig. 3, so that the training tool body can be moved to a desired position around the training tool body support means 9 for use. Therefore, once the training tool body support means 9 is set in a predetermined appropriate installation position, the training tool can be used in a desired direction and condition by simply moving the training tool body in the circumferential direction.

[0058] In sports such as golf that involve a swing, the basic posture before the swing, or in golf terms, the address, is extremely important. The address is the action of holding the club before swinging, but it is an extremely important action that affects the impact point and the direction of the ball after the swing. In the case of the swing training device described above, the spherical part 1 allows the trainee to accurately recognize the proper posture during this address (degree of knee bending, position of lowering the hips, angle of forward lean when leaning forward, etc.).

[0059] In the case of the swing training device described above, the size (outer diameter) of the spherical portion 1 is selected to be suitable for fitting into the recessed space in the center of the gluteal cleft (anal area) between the left and right gluteus maximus muscles of the buttocks of the practicer A, as shown in FIG. 4, for example, and its height is set to a height that allows the practicer A to realize (confirm) an appropriate posture (degree of knee bending, position of lowering the hips, angle of forward lean in a forward leaning posture, etc.) according to the physique of the practicer A. This setting is performed by the practicer A himself / herself using the height adjustment member 3 and height adjustment member fixing means 5. Then, using the presence (detection of the presence and position) of the spherical portion 1 at this height position as a criterion, it is determined whether the address posture (degree of knee bending, position of lowering the hips, angle of forward lean in a forward leaning posture, etc.) is appropriate, and the appropriateness of various subsequent swings such as the backswing, downswing, impact, follow-through, and finish are judged. The judgment for each of these movements is made by the practitioner A himself by feeling and perceiving the contact state and changes in the contact position (horizontal and vertical changes) between the spherical part 1 and the gluteus maximus muscle of the buttocks and the hamstrings part on the back side of the thighs at the above-mentioned set positions.

[0060] As is clear from the human anatomical diagram in Figure 4, the gluteus maximus is the largest muscle in the human buttocks, with a very large surface area, covering the entire gluteus minimus muscle from the lower part of the gluteus medius. The upper skin surface contains tactile nerves (Merkel's disks) and pressure-sensing nerves (Pacinian corpuscles). The tactile nerves (Merkel's disks) sense the contact state of something touching a specific part of the skin, while the pressure-sensing nerves (Pacinian corpuscles) sense the pressure of that contact point. Therefore, these two nerves clearly detect the contact state and changes in contact position (changes in position and pressure) of the spherical part 1 on the surface of the gluteus maximus, and transmit this information to the cerebrum via the nervous system (neurons) in the spinal cord. The pressure-sensing nerves (Pacinian corpuscles) are particularly sensitive.

[0061] The hamstrings are made up of the biceps femoris, semitendinosus, and semimembranosus muscles. If the contact position of the ball 1 during a swing deviates downward from the appropriate position shown in Figure 4 above, the ball 1 will come into contact with the skin on the surface of the biceps femoris. The skin on the surface of the biceps femoris also contains the same tactile nerves (Merkel's disk) and pressure nerves (Pacinian corpuscles) as those mentioned above. Therefore, these two nerves detect the contact state and position of the ball 1 on the surface of the biceps femoris, and this information is transmitted to the cerebrum via the nervous system (neurons) in the spinal cord. This allows the body to recognize that the contact position of the ball 1 during a swing has deviated downward from the appropriate position shown in Figure 4 above.

[0062] In Figure 4, the gluteus maximus muscle on the right side of the page (the right side of the body) has been removed to show the inner gluteus minimus muscle. The hamstrings below the gluteus maximus muscle are shown as a representative part of the biceps femoris muscle.

[0063] As described above, in the embodiment of this invention, the device is composed of a spherical portion 1 that contacts the gluteus maximus muscle of the buttocks of the practitioner, allowing the practitioner to constantly recognize the position of his or her own buttocks (pelvis), an elastic support member 2 that supports the spherical portion 1 so that it can swing circumferentially with a predetermined elasticity to return to its original position, a height adjustment member 3 that supports the spherical portion 1 at a predetermined height via the elastic support member 2, and a support body 4 that supports the spherical portion 1 at a desired height via the height adjustment member 3.The swinging and rebound elasticity of the spherical portion 1 allow the spherical portion 1 to smoothly follow the movement of the practitioner's body, allowing for a completely free swing that does not restrict any part of the practitioner's body, and in this free swing state, the cerebrum can always sense the position of the practitioner's own buttocks through the tactile and pressure nerves in the skin on the surface of the gluteus maximus muscle.

[0064] That is, in the case of this swing training device, when the exerciser presses the left and right gluteus maximus muscle portions of the buttocks against spherical portion 1, which is supported with a predetermined spring pressure so that it can swing freely in the circumferential direction, spherical portion 1 presses the left and right gluteus maximus muscle portions with a predetermined rebound stress corresponding to the spring pressure of elastic support member 2. Then, the tactile nerves and pressure sensory nerves in the skin on the surface of the left and right gluteus maximus muscles accurately detect the contact of spherical portion 1 with the left and right gluteus maximus muscle portions and the pressure with the predetermined rebound stress, respectively, and the brain is reliably notified through the nervous system that spherical portion 1 is contacting the left and right gluteus maximus muscle portions with the predetermined pressure. The contact of spherical portion 1 with the left and right gluteus maximus muscle portions and the pressure with the predetermined rebound stress by both nerves in the skin are sufficient as long as they can be sensed by both of the above-mentioned nerves, and a strong pressure is not required. Therefore, although the spherical part 1 is in contact with the left and right gluteus maximus muscles of the buttocks during the swing, the spherical part 1 does not mechanically restrict the movement of the left and right gluteus maximus muscles, hip joints, or pelvis. Its presence is simply sensed through the nerves in the skin.

[0065] Therefore, the trainee can swing freely as if he were simply practicing, and such a swing will not result in injury, as it would with conventional training devices.

[0066] Moreover, the gluteus maximus muscles on both sides of the buttocks reliably sense the position of the spherical part 1 during the swing, and the cerebrum accurately recognizes the positions of the buttocks and gluteus maximus muscles based on the position of the spherical part 1. Therefore, with this training tool, the basic swing form can be reliably acquired essentially by just practicing swings without being guided by any mechanical guide means, and the training effect is extremely high.

[0067] Furthermore, due to its shape and elasticity, the spherical portion 1 smoothly follows the movements of the gluteus maximus muscles on both sides during the swing, allowing the cerebrum to properly recognize the actual movements of the gluteus maximus muscles. As mentioned above, the gluteus maximus is the largest muscle in the buttocks and is located on the surface of the buttocks. Working in conjunction with the hamstrings in the thighs, it contributes to motor movements such as hip extension, external rotation, adduction, and abduction. The skin covering the gluteus maximus contains the tactile nerves (Merkel's disk) that control the sense of touch and the pressure nerves (Pacinian corpuscles) that control the sense of pressure. Therefore, improper hip (pelvic) position or forward lean at address can be easily detected through differences in contact sensation (differences in contact pressure) with the spherical portion 1 and changes in the contact location (contact position), allowing autonomous corrections to be made during the swing. This contributes to rapid improvement.

[0068] In order to effectively realize such a function, it is preferable to address the spherical portion 1 by abutting it against the center of the gluteal cleft (anal area) formed between the left and right gluteus maximus muscles.

[0069] The center of the gluteal fissure (anal area) formed between the left and right gluteus maximus muscles is located in the middle of the left and right gluteus maximus muscles in the vertical and horizontal directions, as shown in Figure 4, and this anal area is aligned with the direction of the trunk of the upper body. Therefore, it is suitable for detecting whether the forward leaning posture at address is appropriate.

[0070] In this embodiment, the spherical portion 1 has a ball structure in which air at a predetermined pressure is sealed inside.

[0071] In this configuration, the entire spherical portion 1 is soft, elastic, and deformable, so it easily follows the horizontal and vertical movements of the gluteus maximus muscles on both the left and right sides during the swing, allowing the user to more effectively recognize movements such as the rotation of the waist (pelvis).

[0072] Next, a specific description will be given of a method for practicing a golf swing using the swing training device configured as described above, with reference to Figures 5 to 14. In Figures 5 to 14, reference numeral A denotes a trainee, and reference numeral 10 denotes a club (wood or iron) held by trainee A.

[0073] (1) Address As already mentioned, address is the action of preparing the club 10 before swinging, and is an important action that affects the impact point and the direction of the ball. In this case, as shown in Figure 5, first place the training tool shown in Figure 1 behind yourself, adjust the spherical part 1 so that it is at the appropriate height (and position) corresponding to the correct address posture, and address the ball by placing the center of the spherical part 1 in contact with the center of the gluteal cleft (anal area) between the left and right gluteus maximus muscles of the buttocks (position shown in Figure 4). In this case, it is preferable to press the spherical part 1 with the buttocks to the extent that you can feel that the spherical part 1 is firmly and evenly contacting the left and right gluteus maximus muscles.

[0074] That is, pay attention to the position of the ball, stance width, center of gravity, grip, hand position, forward lean, the three lines of toes, knees, and shoulders, and the position of both arms, then bend your knees slightly and tilt your upper body slightly toward the ball to lower your center of gravity. Specifically, from an upright position with your back straight, lean forward by imagining that you are tilting your pelvis from your hip joints, bending your knees slightly while keeping your back straight.

[0075] At this time, the spherical portion 1 contacts the surfaces of the two gluteus maximus muscles at predetermined positions in the center of the gluteal cleft (anal area) with a predetermined pressure, approximately evenly. The tactile and pressure-sensing nerves on the surface of each gluteus maximus muscle detect this movement appropriately. However, the sensation is merely that the spherical portion (ball) 1 is reliably contacting the surfaces of the two gluteus maximus muscles with a predetermined pressure (being pressed with a predetermined repulsive force corresponding to the spring elasticity of the elastic support member 2). Since the two gluteus maximus muscles are not mechanically guided or constrained, no discomfort is felt in the hip joints or buttocks. This is an essential difference from the conventional swing training device described above.

[0076] However, this forward leaning posture with the knees slightly bent, the upper body slightly tilted toward the ball, and the center of gravity lowered allows the brain to autonomously determine whether the state is appropriate or not, based on the criterion that the spherical part 1 is evenly contacting the surfaces of the two gluteus maximus muscles on the left and right at the center of the gluteal fissure (anal area) with a predetermined pressure. Therefore, by being aware of the contact state (touch on the body) of the spherical part 1, it becomes possible to perform an appropriate address movement.

[0077] (2) During the backswing The backswing is the movement of swinging the club 10 back, and the trajectory of the club 10 during the swing changes significantly depending on whether this movement is appropriate. During the take-back, the club head is kept parallel to the ground while the pelvis is rotated in the forward-leaning posture at address as shown in Figure 5 to the states shown in Figures 6, 7, 8, and 9. At this time, the triangle connecting both shoulders and the grip should be maintained until the club head reaches the business zone (the range until the shaft is parallel to the ground).

[0078] In the range from the business zone to the top, care must be taken to prevent the axis of the body (trunk) from drifting in the direction of the swing. The important thing is not to move the center of gravity of the body in the direction of the swing, but to imagine twisting the pelvis around the right hip joint as an axis during the take-back, as shown in Figures 6, 7, 8, and 9. This image can be perceived at the start of the take-back as shown in Figure 6 and during the take-back as shown in Figure 7. At the address time in Figure 5, one of the two gluteus maximus muscles (the left gluteus maximus) was in substantially equal contact with the spherical part 1 at a predetermined position with a predetermined pressing force. At the end of the take-back as shown in Figures 8 and 9, when the pelvis is twisted around the right hip joint, the pressing force of the spherical part 1 on the left gluteus maximus decreases.

[0079] Furthermore, lifting of the body during the backswing or overswing can be properly perceived based on the contact state and change in contact position between the two gluteus maximus muscles and the spherical part 1. When the body lifts up, the contact position of the spherical part 1 shifts downward and moves to the surface side of the biceps femoris muscle of the hamstrings. By perceiving this, the body lifting up can be recognized.

[0080] This allows you to avoid swaying during the backswing and maintain the proper impact position established at address, resulting in a stable swing that eliminates mishits such as tops, duffs, slices, and hooks.

[0081] (3) During the downswing In the downswing, as shown in Figure 10, while paying attention to the direction of the club face, the club 10 is swung down in an arc (inside-in) with a feeling of moderate acceleration from the peak of the backswing shown in Figures 8 and 9. During this time, it is desirable to keep the position of the pelvis (height and horizontal positions in the front, back, left and right directions) unchanged and to swing the club 10 down with the image of twisting the pelvis.

[0082] During this downswing, it is important to properly grasp the position of the pelvis as well as the extension of the body and the shift of weight, and this can be properly confirmed by checking the contact state and change in contact position between the two gluteus maximus muscles on the left and right and the spherical part 1. When the body extends upward, the contact position of the spherical part 1 shifts downward and moves to the surface side of the biceps femoris of the hamstrings mentioned above. By perceiving this, it is recognized that the body has extended upward.

[0083] (4) At impact At impact, as shown in Figure 11, swing the club 10 down so that the grip is in the same position as at address. From the backswing shown in Figures 6 to 9, the downswing shown in Figure 10, and up to impact, keep your eyes on the ball. The pelvis position is maintained the same as at address.

[0084] This allows for an accurate arc of rotation at impact. Whether or not the pelvis position is maintained as it was at address can be properly checked based on the contact state and change in contact position between the two gluteus maximus muscles on the left and right and the spherical part 1. The two gluteus maximus muscles on the left and right are located just behind the pelvis, making them suitable for checking the position of the pelvis.

[0085] (5) Follow-through In the follow-through, as shown in Figures 12 and 13, the hips are rotated firmly, and the arms holding the club 10 are extended straight and swung through. In this case, as shown in Figures 12 and 13, the head is not raised immediately after impact, but the forward leaning posture is maintained and the eyes are kept on the spot where the ball was as the swing is completed.

[0086] Even with this follow-through, if you're within the business zone, you can achieve a dynamic follow-through by keeping both arms straight while maintaining the triangle shape described above. In this case, as with the backswing, don't let your body move in the direction of the club's swing (make sure your body doesn't move in the direction of the club's swing from a straight line drawn vertically upward from the outside of your left foot), and swing through with the image of rotating your hips backward. This stabilizes the direction of the ball.

[0087] In this case, the rotation of the waist, maintaining a forward leaning posture, and maintaining the body axis can be properly confirmed based on the contact state and change in contact position between the two gluteus maximus muscles on the left and right and the spherical part 1.

[0088] (6) At the finish At the finish, as shown in Figure 14, the swing of the club 10 is completed with the sole of the right foot visible, and the center of gravity of the body is entirely on the left foot, and the body comes to rest in a state facing straight toward the target. Then, the line of sight is turned in the direction of the ball's flight.

[0089] The shift of the body's center of gravity (weight shift) at the time of the finish and the rotation of the entire body toward the target can be properly confirmed based on the contact state and change in contact position between the two gluteus maximus muscles on the left and right and the spherical part 1. The shift of the center of gravity (weight shift) can also be perceived from the tension and contraction of the muscles of one leg.

[0090] As described above, with the swing training device according to the embodiment of the present invention, when practicing the basic golf swings (1) to (6) above, the contact state between the spherical part 1 and both left and right gluteus maximus muscles of the buttocks in each swing state and the horizontal and vertical changes in the contact position are autonomously felt (perceived) through the tactile and pressure sensory nerves in the skin on the surface of both left and right gluteus maximus muscles and biceps femoris, and it is possible to learn how to use the trunk appropriately, how to shift weight, and how to utilize the difference in torsion between the legs and waist and the arms and shoulders.

[0091] In particular, being able to swing while sensing (recognizing) that both gluteus maximus muscles of the buttocks are in contact with the spherical part 1 is effective in suppressing lifting, swaying, and overswing of the body during the backswing. It also makes it possible to appropriately suppress lifting of the body from the downswing to impact.

[0092] Moreover, in the case of the swing training device according to the embodiment of the present invention, all of the swing training steps (1) to (6) can be performed in a completely free, full swing state without any mechanical guide means or restraint means, so it is possible to not only practice swings but also to practice swings while actually hitting a ball. Therefore, the effect of improving your skill is extremely great.

[0093] In this way, if you can correctly master each of the basic swing forms (1) to (6) above, your score will improve and you will be able to enjoy your round with confidence.

[0094] The swing training device of this embodiment can be used in a variety of practice locations, such as in front of a golf net at home or at a golf driving range. However, when used in combination with a golf simulator, which has become popular recently and involves swinging towards a screen displaying a golf course, a more realistic feel can be experienced and practice can be performed more effectively.

[0095] <Modification> The components of the training tool main body and the training tool main body support means according to the above embodiment are not limited to the configurations explained above, but can be modified in various ways as follows.

[0096] (Variation 1) In the above-described embodiment, the spherical part 1, which is the main part of the present invention, is configured as a ball structure with a smooth surface and filled with air at a predetermined pressure, but the configuration of this spherical part 1 is not necessarily limited to a ball structure filled with air at a predetermined pressure, and it can also be configured, for example, as a spherical synthetic resin material molded with a hollow interior. The synthetic resin material can be either hard or soft.

[0097] The spherical part 1 may be entirely made of sponge material, or the surface of the sponge material may be covered with a smooth resin material.Instead of the sponge material, polystyrene foam may also be used.

[0098] All of these materials are lightweight, and just like the ball structure described above, the bending deformation of the elastic support member 2 allows the repulsive pressure force to be effectively applied to the gluteus maximus muscles on the left and right sides of the user's buttocks.Furthermore, the free deformation of the elastic support member 2 allows it to smoothly follow the rotation of the gluteus maximus muscles on the left and right sides of the buttocks during the swing.

[0099] Furthermore, the spherical shape of the spherical portion 1 in the above embodiment is not limited to a regular sphere, but may be a slightly elliptical shape.

[0100] (Variation 2) In the configuration of the above embodiment, the surface of the spherical part 1, which is the main part, is made smooth, which allows for high sliding properties with the clothing fabric on the surface of the gluteus maximus muscle of the buttocks, but the surface of this spherical part 1 can be transformed into one with a structure similar to the surface of a basketball, with predetermined convexities evenly distributed over the entire surface.

[0101] By providing predetermined protrusions evenly across the entire surface of the spherical portion 1 of the ball structure in this way, the sensing function of the spherical portion 1 on the surface of the thigh muscles on the left and right buttocks (the above-mentioned tactile and pressure sensing functions) is effectively improved, making it easier to recognize the spherical portion 1 during a swing. In this case, by making the size of the protrusions themselves small, like the protrusions on the surface of a basketball, and making the upper ends of the protrusions themselves spherical, the necessary sliding ability between the surface of the gluteus maximus muscles of the buttocks and clothing can be sufficiently ensured. Therefore, there is no effect at all on the degree of freedom of rotation of the gluteus maximus muscles on the left and right buttocks during a swing, or on their ability to follow that rotation.

[0102] (Variation 3) In the above embodiment, the present invention comprises a spherical portion 1, an elastic support member 2 of a predetermined length that supports the spherical portion 1 swingably with a restoring elasticity of a predetermined level or more, a height adjustment member 3 of a predetermined length that supports the height of the spherical portion 1 at a predetermined height via the elastic support member 2, a support portion main body 4 of a predetermined length that fits and supports the height adjustment member 3 so that it can slide up and down, height adjustment member fixing means 5 that fixes the height adjustment member 3 fitted into the support portion main body 4 at a predetermined height, and a fixing means for fixing the support portion main body 4 in a stable upright position (vertical upright position) on a predetermined installation surface. The training tool body is made up of a support plate 6 having a larger diameter than the support body 4 that it supports, and furthermore, a training tool body support means 9 is provided on the side of the lower end 4b of the support body 4 of the training tool body, which is connected via a connecting member 7 of a predetermined length extending horizontally and a rotating member 8 perpendicular to the connecting member 7. This ensures that the training tool body can be maintained upright without falling over, and also allows the training tool body to be freely installed at any position around the outer periphery (360° direction) of the training tool body support means 9 (see Figure 3).

[0103] With this configuration, the vertical stability of the training tool body is indeed high, and once the training tool body support means 9 is installed in a designated location, the training tool body alone can be moved circumferentially as shown in Figure 3, allowing the training tool to swing in a desired position and in a desired direction.

[0104] However, in the case of a configuration provided with the training tool body support means 9 as described above, it is inconvenient to carry and takes up a large installation space, so it has the disadvantage that it cannot be brought into a golf driving range or the like for use.

[0105] Therefore, as a configuration to accommodate such uses, instead of providing a connecting member 7 of a predetermined length extending horizontally on the side of the lower end 4b of the support tube 4 and a training tool main body support means 9 connected via a rotating member 8 perpendicular to the connecting member 7, a configuration can be adopted in which the diameter of a support plate 6, which is larger than the support part main body 4 and supports the support part main body 4 in a stable upright state (vertical upright state) on a predetermined installation surface, is made even larger, as shown in Figure 15, so that the training tool main body can be maintained in a stable upright state even without the training tool main body support means 9.

[0106] In this case, if the surface on which the training tool body is placed is not horizontal, the large-diameter support plate 6 can be modified to a tripod structure. Such a modification increases the portability of the training tool body and also increases the flexibility of the installation location (practice location).

[0107] (Variation 4) In the configuration of the above embodiment, the elastic support member 2 that swingably supports the spherical portion 1 is made of rubber material alone, without a core material. In the case of rubber material with high viscosity and impact resilience, the rubber material alone can fully achieve the necessary bending elasticity and restoring elasticity, while also maintaining durability.

[0108] However, the rubber portion can be modified to reduce the amount of rubber material required, reduce weight, and improve bending elasticity, for example by making the inside of the rubber portion hollow with a bellows structure.

[0109] In addition, the elastic support member 2 in the above embodiment can have a larger spring constant for bending elasticity and can have a metal core material in the center that is more flexible and has a higher springiness than rubber in order to increase the pressure acting on the gluteus maximus muscles on the left and right sides of the buttocks. In this way, the presence of the spherical portion 1 in the gluteus maximus muscles on the left and right sides of the buttocks can be more easily sensed during swing practice.

[0110] (Variation 5) In the above embodiment, the spherical portion 1 and elastic support member 2 of the training device main body are supported vertically by the support body 4. Therefore, the spherical portion 1 and elastic support member 2 are pressed by the left and right gluteus maximus muscles of the buttocks, bending and deforming in a direction perpendicular to the axis, and only press against the left and right gluteus maximus muscles of the buttocks with their resilience. Therefore, the pressing force is inevitably weak. Also, there is a problem that it is difficult to fit into the gluteal cleft in the center between the left and right gluteus maximus muscles as mentioned above.

[0111] Furthermore, when addressing the ball in golf, a player stands upright with their back straight and leans forward, imagining that they are tilting their pelvis from their hip joints toward the ball. However, when they lean forward in this way, if the spherical portion 1 and elastic support member 2 are supported vertically by the support tube 4, the spherical portion 1 will come into contact with the hamstrings below the center of the gluteal fissure (anal area) between the left and right gluteus maximus muscles, causing a problem of not properly contacting the left and right gluteus maximus muscles. This makes it difficult to properly sense the presence of the spherical portion 1. Furthermore, the spherical portion 1 and elastic support member 2 in this upright state play no role in recognizing the forward tilt angle of the forward leaning posture that passes through the pelvis and upper body during address.

[0112] To solve this problem, for example, as shown in Figure 16, the upper end 3a of the height adjustment member 3 supporting the spherical portion 1 and elastic support member 2 is bent into a "L" shape to correspond to the forward tilt angle of the forward tilt posture, and the spherical portion 1 and elastic support member 2 are deformed so that they extend in the direction of the tilt angle from the pelvis of the exerciser along the upper body.

[0113] In this way, the installed spherical portion 1 and elastic support member 2 extend straight toward the center of the gluteal cleft (anal area) between the left and right gluteus maximus muscles, and come into contact with the center of the gluteus maximus muscles (anal area) of the practicer's gluteus maximus muscles with sufficient pressure. In addition, the spherical portion 1 and elastic support member 2, which extend straight toward the center of the gluteus maximus muscles (anal area) with this predetermined forward tilt angle, allow the practicer to properly recognize the forward tilt angle of the forward posture at address. Therefore, posture and stance at address are effectively improved.

[0114] Furthermore, in this configuration, the horizontal position of the spherical portion 1 is away from the central axis (vertical axis) of the support portion main body 4 and the support plate 6 of the training device main body, so even if the diameter of the support plate 6 is increased as shown in Figure 15, there is more space under the trainee's feet.

[0115] <Practice Use of the Swing Training Device According to the Present Invention> In the above embodiments, the swing training device has been described as being used primarily for practicing golf swings. However, the swing training device of the present invention is by no means limited to golf swing training, and can also be used for baseball and tennis swing training, which involve similar swing movements.

[0116] For example, in baseball, the device can be used not only during practice such as swinging, tee batting, and toss batting, but also during batting practice at a batting center. In the case of tennis, it can be used for practicing strokes, volleys, serves, smashes, and other swings, as well as for similar swing practice using an actual ball. [Explanation of symbols]

[0117] 1 is the spherical part 2 is an elastic support member 3 is a height adjustment member 4 is the support body 5 is a height adjustment member fixing means 6 is the support plate 7 is a connecting member 8 is a rotating member 8a is the rotation axis 9 is a training tool body support means

Claims

1. This swing training device for swing sports is characterized by comprising a spherical portion that contacts the gluteus maximus muscle of the buttocks of the practicer to allow the practicer to always recognize the proper position of the buttocks, an elastic support member that supports the spherical portion so that it can swing in the circumferential direction with a predetermined elasticity to return to its original position, and a support body that supports the spherical portion at a predetermined height via the elastic support member, and by utilizing the swing and rebound elasticity of the spherical portion to make the spherical portion smoothly follow the movement of the body, allowing the practicer to always experience and perceive the proper position of the buttocks in a completely free swing state that does not restrict any part of the body.

2. 2. A swing training device for swing sports according to claim 1, wherein the spherical portion is a ball member filled with air at a predetermined pressure.

3. 3. A swing training device for swing sports according to claim 1, wherein the surface of the spherical portion is provided with a predetermined protrusion that makes it easy to sense the state of contact with the gluteus maximus muscle of the buttocks.

4. 3. A swing training device for swing sports according to claim 1, wherein the elastic support member is supported on the support body via a predetermined height adjustment member.

5. 5. A swing training device for swing sports according to claim 4, wherein an upper portion of the height adjusting member is bent forward at a predetermined angle in accordance with a forward leaning posture during a swing.

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