JP5467193B2 - Pitching practice tool - Google Patents

Description

The present invention relates to a pitching practice tool that can train the lower body at the same time while training the fingertips in sports such as baseball, golf, judo, handball, tennis, sumo, badminton, and volleyball.

  Conventionally, there has been considered an instrument for forging a fingertip using a dumbbell to prevent an injury or the like during sports (for example, Patent Document 1).

  JP 2008-55138 A

  The instrument described in Patent Document 1 is a dumbbell shape with weights attached to both ends of a grip, and each finger is inserted into a hole penetrating the grip, and training is performed by lifting the instrument or rotating the finger. In addition, he was able to train the base of the finger and the surrounding muscles and tendons. However, I was able to train the fingers and the base of the fingers, and the surrounding muscles and tendons, but for example, a baseball pitcher felt uncomfortable when trying to throw the ball like a ball by holding it with a finger. . Also, the entire finger was trained, but it was not possible to train only the fingertip.

  Also, it was not a ball-like shape that could be used for batting and throwing practice.

The present invention takes into account the above-mentioned problems of the devices of the patent literature, and in sports using the fingertips, it is possible to increase the exercise ability by forging the fingertips and to throw a low-rotation ball, An object of the present invention is to provide a pitching practice tool capable of hitting a ball.

In order to achieve the above object, the pitching practice tool of the present invention comprises a spherical body and two holes into which a forefinger and middle finger formed from the surface layer to the deep part can be inserted into the spherical body . The holes are formed so that the spherical bodies are arranged along the center line A from the side when viewed from the front and are not parallel to the center line B from the top when viewed from the front. The hole is characterized in that an end point portion that is a portion ahead of the first joint in a state where the index finger and the middle finger are inserted is formed to have a larger diameter than a start point portion of the hole .

Further, each of the two holes is characterized in that a stepped portion having an angle that expands from a position in the middle of reaching the deep portion of the hole toward the back is formed, and an end point portion is formed following the stepped portion .

Further, each of the two holes is formed so as to bifurcate bifurcated from a position on the way to the deep portion, and an end point portion is formed following the branched portion .

Further, each of the two holes is characterized in that a hole path is formed so as to have an angle between an index finger and a middle finger in a state where the hand is naturally opened .

Of the two holes, the hole for inserting the index finger is formed shorter than the hole for inserting the middle finger .

  The spherical material may be formed of a material such as iron, casting, resin, wood, rubber, leather, stainless steel, aluminum, cork, polystyrene foam, cloth, paper, or the like.

In the pitching practice tool according to claim 1, the two holes into which the index finger and the middle finger formed in the spherical body can be inserted are arranged along the center line A from the side, so that the index finger and the middle finger can be inserted horizontally. When you hold a normal baseball ball, you can insert your index finger and middle finger with your hands open naturally by forming it so that it is not parallel to the center line B from above As you can see, you can train without any discomfort. In addition, when the index finger and the middle finger are inserted, the end portion, which is the portion ahead of the first joint, is larger in diameter than the start point portion of the hole, so that the hole can be inclined to the back, so that the first joint of each finger Can be easily hooked, and exhibits an excellent effect of preventing the pitching practice tool from coming off from the fingertip.

Also, by forcing the forefinger and middle finger into the hole, sculpting the fingertips of the forefinger and middle finger, especially the first joint, by exercising such as curving the fingers while holding a spherical body, rotating the wrist and shoulder, etc. It stimulates the muscles around the arms and shoulders, and exerts an excellent effect of gripping and strengthening muscle strength.

In addition, you can hold the pitching practice tool without gripping the pitching practice tool with your finger by putting your finger in the pitching practice tool , and you can hold your fingertip, wrist, elbow, arm, shoulder, etc. without holding the pitching practice tool with your finger. It is possible to remove power from the upper body and demonstrate the excellent effect of being able to throw at the lower body.

The pitching practice tool according to claim 2 is formed with a stepped portion having an angle that expands from the middle position to the deep portion of the hole toward the back, and an end point portion is formed following the stepped portion. There is a space for bending and hooking the first joint, and it is possible to exercise to lift the pitching practice tool so as to push up the hole wall with the fingernail. Further, the bending and stretching movement of the first joint of the finger can be performed while applying a load only to the first joint of the finger. In this way, by exercising only the first joint of the finger, the grip strength, finger pressure, arms, and muscles around the shoulder are trained, thereby preventing a decrease in grip strength during the match and At the same time, it is possible to increase the rotation of the ball with the fingertips, and it is possible to throw a crisp ball such as a fast ball or a changing ball .

The pitching practice tool according to claim 3 has an excellent effect that a right-handed and left-handed person can be shared by one pitching practice tool by forming it so as to bifurcate bifurcated from a position in the middle of each hole. Demonstrate.

In addition, the bifurcating branch from an arbitrary position of the hole to the final point portion forms an inclined angle from the arbitrary position of the hole to the final point, and hooks the first joint of the finger. In addition to creating space, when the fingertip hits the wall part around the point where the hole splits into two, the excellent effect that the fingertip is caught and the risk that the pitching practice tool completely slips out of the fingertip is reduced. .

In addition, because the space for hooking the first joint of the finger is created, the fingernail is designed so that the nail of the fingertip hits the wall immediately before bifurcating, so that the hole of the hole can be formed with the fingernail while the first joint is bent. The pitching practice tool can be lifted to push up the wall, and the first joint of the finger can bend and stretch while applying a load only to the first joint of the finger. By exercising only the first joint of the finger, the grip strength, finger pressure, arms, and muscles around the shoulder are trained. As a result, it is possible to prevent a decrease in grip strength during the game, and to increase the rotational force to the ball with a fingertip when throwing, and to throw a crisp ball such as a fast ball and a changing ball. Exhibits excellent effects.

The pitching practice tool according to claim 4 is excellent in that training can be performed while holding the pitching practice tool with a fingertip without a sense of incongruity by forming a hole path so that the angle between the index finger and the middle finger of the hand is naturally open. Show the effect.

In the pitching practice tool according to claim 5, by forming the hole for inserting the index finger shorter than the hole for inserting the middle finger, it is possible to insert the finger according to the length of the index finger and the middle finger, and it is possible to easily train without feeling uncomfortable. Exhibits excellent effects.

The pitching practice tool according to claim 6 supports the center of the spherical body by inserting an index finger and a middle finger into the hole of the spherical body when the spherical body is molded from a light material such as wood, plastic, rubber, resin, cork, for example. it is lighter lifting one possible as. When performing a series of pitching motions from takeback, ball release, follow-through, and finish, throw the ball with the sensation of the index finger and middle finger in the hole of the spherical body and pull it forward as normal The release can be slower than the pitching release point, and the arm can be swung forward. By swinging the arm forward, the follow-through will inevitably increase and the arm swinging speed will be demonstrated.

Moreover, it can also be said that the pitching practice tool of the present invention is hit by forming it with a lightweight material. Unlike normal throwing where the number of rotations is applied to the ball with a fingertip, when the sphere is flying by throwing it forward from the forefinger and middle finger placed in the hole of the sphere The number of rotations of the ball can be suppressed, and the ball can be trained to hit a ball having a low ball speed and a low ball speed. The ability to practice hitting a ball type such as a knuckle ball with a low rotation speed with a high degree of difficulty makes it possible to improve the hitting technique and to perform training for both throwing and hitting. .

  It is the figure which respectively represented the centerline from right side seeing from the front of a sphere, the centerline from right above seen from the front, and the centerline from the side seen from the front. It is a front view of the pitching practice tool of the present invention. It is a bottom view of the pitching practice tool of the present invention. It is a left view of the pitching practice tool of this invention. It is a left view of the 2nd Example of the pitching practice tool of this invention. It is a front view of the 3rd example of the pitching practice tool of the present invention. It is a left view of the 3rd Example of the pitching practice tool of this invention. It is a front view of the 4th example of the pitching practice tool of the present invention. It is a left view of the 4th Example of the pitching practice tool of this invention. It is a top view of the 4th example of the pitching practice tool of the present invention. It is a front view of the 5th Example of the pitching practice tool of this invention. It is a bottom view of 5th Example of the pitching practice tool of this invention. FIG. 12 is a left side cross-sectional view taken along the line DD of FIG. 11 of the fifth embodiment of the pitching practice tool of the present invention. It is the EE line right side sectional view of Drawing 5 of the 5th example of the pitching practice tool of the present invention. It is a reference figure which shows the use condition of the pitching practice tool of this invention. It is a reference figure which shows the use condition of the 2nd Example of the pitching training tool of this invention. It is a reference figure which shows the use condition of the 3rd Example of the pitching training tool of this invention. It is a reference figure of the left side surface which shows the use condition of the right-handed person of the 5th Example of the pitching training tool of this invention. It is a reference figure of the left side surface which shows the use condition of the left-handed person of 5th Example of the pitching training tool of this invention.   This is the release point when throwing with a normal ball. It is a figure showing the position of the release point of the pitching practice tool of this invention. It is the figure showing from the take-back of the 3rd Example of the pitching practice tool of this invention to follow-through.

Hereinafter, the present invention will be described with reference to FIGS. However, the form for implementing the following is described as an example of the present invention and the pitching practice tool , and is not limited to the section of the drawings of this description.

FIG. 1 is a diagram showing a center line A 1 from the side when a general sphere is viewed from the front, a center line B 1 from the top when viewed from the front, and a center line C from the side as viewed from the front. Each center line is a center line serving as a guide for forming a hole in the spherical body.

FIG. 2 is a front view of the spherical body of the present invention. Spherical body 1, hole 2, 2 ′, center line A from the side as viewed from the front, and center line B from the top as viewed from the front. The holes 2 and 2 'are formed symmetrically with respect to the center line B, and the angles of the holes 2 and 2' extending from the starting points of the entrances of the holes 2 and 2 'are the angles of the index and middle fingers when the palm is naturally opened. Form at a general angle. The depths of the holes 2 and 2 'can be freely formed such as the length of the finger about the first joint, the length from the fingertip to the second joint, and the length where the finger can be entirely inserted. The size of the spherical body 1, the shape of the hole, the depth, the diameter of the hole, etc. can be set to a size that anyone can use by inserting a finger into the hole, and anyone can use it with regard to weight and specifications. It can be set freely.

Also, the spherical body 1, the wall surface of the index finger between the holes of the second holes formed and 2 ', sandwiched by the middle finger, enhanced ball, loosening the index finger and middle finger while the image of the lower ball like height The spherical body can be released from the finger and fly to the catching side, and the fingertip is rubbed against the wall surface between the holes 2 and 2 'of the spherical body 1 at the moment when the spherical body is separated from the finger. The position of the point can be understood.

FIG. 3 is a bottom view of the pitching practice tool of the present invention. A spherical body 1, holes 2, 2 ′, a center line A from the side as viewed from the front, and a center line C from the side as viewed from the front. Holes 2, 2 ′ are formed along the center line A from the side of the spherical body 11. By forming the holes 2, 2 ′ along the center line A, the spheres can be stably sandwiched without any deviation of the center of gravity when the sphere 1 is held by putting a finger in the holes 2, 2 ′.

FIG. 4 is a left side view of the pitching practice tool of the present invention. The spherical body 1, the hole 2, the center line B from right above when viewed from the front, and the center line C from the side as viewed from the front. The hole 2 is formed at a right angle to the surface of the spherical body 1, and the depth is set to the first joint of the finger, or from the first joint to the second joint, or an arbitrary length so that the entire finger can be inserted. it can. For example, if it is used for baseball, a right index finger can be inserted into the second hole if it is right-handed, and if it is left-handed, a left index finger can be inserted to hold the spherical body.

FIG. 5 is a left side view of the second embodiment of the pitching practice tool of the present invention. The spherical body 3, the holes 4, 4 ′, a center line B from directly above when viewed from the front, and a center line C from the side as viewed from the front. The holes 4, 4 ′ are formed so as not to be parallel to the center line B viewed from directly above the spherical body 3. For example, an index finger is inserted into the hole 4 ′ where the tip of the hole is facing the left side from the center line B, and a middle finger is inserted into the hole 4 facing the right side from the center line B. The angle of the holes 4 and 4 'into which the finger is inserted is set so that the position where the hole angle becomes horizontal becomes the release point when the ball is released.

FIG. 6 is a front view of a third embodiment of the pitching practice tool of the present invention. The spherical body 5, the holes 6 and 6 ′ formed in the spherical body, the center line A from the side as viewed from the front, and the center line B from the top as viewed from the front. In the third embodiment, two holes 6 and 6 ′ are formed at equal intervals on the center line B from directly above, and the depth of the hole 6 ′ is longer than the hole 6. This is because the finger length of a normal person's hand is longer than the index finger , and the middle finger is longer than the index finger. Throwing the index finger smoothly by inserting the index finger into the hole 6 and the middle finger into the hole 6 '. You will be able to train and move your fingertips.

FIG. 7 is a left side view of the third embodiment of the pitching practice tool of the present invention. A hole 6 formed in a spherical body, a starting point 7 of the hole, a final point 9 of the hole, a step 8 formed in the hole, a center line B from directly above when the spherical body is viewed from the front, and a center from the side when viewed from the front. Consists of line C. The hole forms a depth along the center line B from directly above when viewed from the front, but the portion to be the final point 9 is formed so as not to be positioned on the center line B from directly above. By not locating the final point 9 on the center line B from directly above, an angle is formed in the hole from the start point 7 to the final point 9 of the hole, and the step portion 8 is formed. In FIG. 7, the diameter of the portion that becomes the final point 9 is larger than the starting point 7 of the hole.

  By forming the step 8 and the final point 9, the part of the finger from the first joint is caught on the step 8 and the final point 9, and the fingertip is trained by the load of the spherical body on the fingertip when throwing. Can do. By training your fingertips, you can throw a crisp ball when you throw a ball, such as adding rotation speed to the ball or increasing the change of the changing ball. Further, since the step portion 8 is inclined, it is possible to reduce a risk that a finger is caught on the spherical body and the spherical body is dropped.

FIG. 8 is a front view of a fourth embodiment of the pitching practice tool of the present invention. A hole 10, 10 ′ formed in a spherical body, a center line A from the side as viewed from the front, and a center line B from directly above as viewed from the front. In the fourth embodiment, holes 10, 10 'penetrate through the spherical body. This is because the process of the mold can be omitted when commercializing, and is functionally equivalent to the other embodiments.

FIG. 9 is a left side view of the fourth embodiment of the pitching practice tool of the present invention. Hole 10 formed in a spherical body, hole start point 11, hole end point 13, step 12, penetration end point 14, center line B from directly above when viewed from the front, center line from the side as viewed from the front Composed of C. The hole 11 similar to that in FIG. 7 is formed so as to penetrate the hole along the center line B from directly above, but the portion that becomes the final point 13 is not positioned on the center line B. By not locating the final point 13 on the center line B from directly above, an angle is formed in the hole from the starting point 11 to the final point 13 of the hole, and a step portion 12 is formed. In the fourth embodiment, the hole is formed such that the diameter of the portion that becomes the penetration end point 14 is larger than the start point 11 of the hole.

FIG. 10 is a plan view of a fourth embodiment of the pitching practice tool of the present invention. It consists of holes 10 and 10 'formed in a spherical body, penetrating end points 14 and 14', a center line A from the side as viewed from the front, and a center line C from the side as viewed from the front. The starting points of the holes 10, 10 'penetrating the spherical body are circular, but the shapes of the penetrating end points 14, 14' are oval. The holes 10 and 10 'penetrating the spherical body are changed in the shape of the hole at the starting point and the shape of the hole 14 as the penetrating end point, or the diameters of the end points 14 and 14' are made larger than those of the holes 10 and 10 'in FIG. A stepped portion 12 is formed. By forming the stepped portion 12, the finger can be hooked to the final point of FIG. 9-13 and the stepped portion 12, and the body learns how much force is applied to the fingertip when throwing, and develops the sensation of the fingertip Will be able to.

FIG. 11 is a front view of a fifth embodiment of the pitching practice tool of the present invention. Spherical body 15, holes 16, 16 ′, center line A from the side when viewed from the front, center line B from the top when viewed from the front, cut surface DD line, cut surface EE line . A hole 16 ′ on the right side when viewed from the front is formed longer than the hole 16. This is because human fingers do not have the same length for any finger, and the length of the hole is increased or decreased so that any finger can be used for training.

FIG. 12 is a bottom view of the fifth embodiment of the pitching practice tool of the present invention. Spherical body 15, holes 16, 16 ′, final points a and b of hole 16 where the index finger enters, final points a ′ and b ′ of hole 16 ′ where the middle finger enters, center line A from the side when viewed from the front, from the front It consists of a center line C from the side. The holes 16 and 16 'are formed on the center lines A and C, but a, b, a' and b 'which are the final points of the holes 16 and 16' represented by dotted lines are center lines viewed from the side. It is important to form it so as not to be positioned on A. The hole 16 is formed to the deep part of the spherical body, and a and b which are the final points are bifurcated as shown by the dotted line. Further, the portions a ′ and b ′ which are the final points of the holes 16 ′ are also bifurcated.

FIG. 13 is a left side cross-sectional view taken along the line D-D in FIG. 11 of the fifth embodiment of the pitching practice tool of the present invention. The spherical body 15, the hole 16, the final points a and b of the hole 16, and the dotted line behind the hole 16 are the holes in FIG. 1-16 ′, the final points a ′ and b ′ of the hole 16 ′, the front surface A center line B from directly above as viewed from the front, and a center line C from the side as viewed from the front. The holes 16 and the final points a and b of the hole 16 are formed on the center line B from above. The reason why the final points a 'and b' of the hole 16 'represented by dotted lines are higher than the final points a and b of the hole 16 is that the hole 16' is longer than the hole 16 as shown in FIG. It is because it has been. The right-handed person uses the right index finger at the final point b and the middle finger of the right hand at the final point b ′.

  In addition, the final points a and b are branched from an arbitrary position of the hole 16 on the center line B from directly above as viewed from the front, and the projecting portion faces the starting point side of the hole 16 at this branch point. Is formed. Similarly, protrusions are formed at the branch points where the final points a ′ and b ′ of the hole diagrams 14-16 ′ branch toward the starting point side of the holes 16 ′. This protrusion is designed to come into contact with the nail side opposite to the abdomen of the finger. The nail side is pressed against this protrusion and the pitching practice tool of the present invention is lifted or lowered only with the fingertip. Can bend and stretch.

FIG. 14 is a right side cross-sectional view taken along line EE of FIG. 11 of the fifth embodiment of the pitching practice tool of the present invention. Spherical body 15, hole 16 ', final point a', b 'of hole 16', and dotted line behind hole 16 'are the final points a and b of hole 13-13. It consists of a center line B from above and a center line C from the side as viewed from the front. The final points a and b 'of the holes 16' and 16 'are formed on the center line B from directly above. Also, the reason why the final points a and b represented by the dotted lines are lower than the final points a 'and b' of the hole 16 'is that the hole in FIGS. 11-16 is formed shorter than the hole 16'. . The left-handed person uses, for example, the left index finger at the final point a and the middle finger of the left hand at the final point a ′.

Further, FIG. 13, FIG. 14 is the same spherical-shaped body 15 either, the branches the respective final points of the holes 16, 16 '2 addition, the right-handed one of pitching practice tool, the left-handed serviced This is to make it possible.

FIG. 15 is a reference diagram showing a use state of the pitching practice tool of the present invention. A finger is inserted into the hole formed in the spherical body as shown in FIG. Hold the hole wall with the belly of your finger and start pitching in this state. When the arm turns straight in the pitching motion trajectory, the spherical body comes off the finger and is released. The position of the release point can be grasped by removing the spherical body from the finger, so that the release can always be performed at the same place, and the control becomes stable. In addition, when the spherical body is formed of a heavy object such as iron or casting, the fingers are put in the holes formed in the spherical body, and the fingers are bent and extended, and the wrist is rotated. Just by doing a load on the fingertips, you can train your fingertips, wrists, elbows, arms and so on.

FIG. 16 is a reference diagram showing a usage state of the second embodiment of the pitching practice tool of the present invention. A hole is formed so that the index finger can be placed on the upper side and the middle finger can be placed on the lower side. When the finger is inserted and the arm is swung, the hole becomes horizontal at the location that becomes the release point. By the way, at the time of takeback, the position of the hole is the index finger upward and the middle finger downward. Since the muscles on the human arm are spiral, the shoulder, elbow, wrist, and fingers are twisted during takeback, but the shoulder, elbow, wrist, and fingertips are twisted from release to follow-through. The muscles are gradually growing straight ahead. Therefore, when throwing, the index finger is faster toward the catcher than the middle finger . The pitching practice tool of the present invention considers the point when the hole is horizontal as a release point, and first forms the hole into which the index finger that faces the catch side first faces upward, and the hole into which the middle finger enters facing downward. .

FIG. 17 is a reference diagram showing a usage state of the fourth embodiment of the pitching practice tool of the present invention. Put the finger into the hole so that the first joint of the finger is placed from the step part of Fig. 7-8 to the final point 9 and rotate the ball using only the tip of the finger, bend it, etc. Training such as turning and swinging a sphere using arms is possible. 7-8, the last point 9 serves to prevent the fingertip from slipping, and is formed so that the finger does not come off the spherical body. If the finger does not come off, you can perform training such as swinging and turning with a spherical body, and when releasing the spherical body, extend the fingertip at the release point, the step shown in Figure 7-8, the final point The fingertip is removed from 9 and the spherical body can fly to the catching side.

FIG. 18 is a reference diagram showing a usage state when the fifth embodiment of the pitching practice tool of the present invention is used by a right-handed person. Spherical body 15, hole 16 for inserting index finger of right hand, final points a and b of hole 16, hole for inserting middle finger of right hand Final points a 'and b' of Fig. 14-16 ', center from above when viewed from the front The line B is composed of the center line C from the side as viewed from the front. The index finger of the right hand and the hole 16 into which the index finger enters are represented by a thick dotted line, and the middle finger and the hole 16 'of the right hand are represented by a thin dotted line. The index finger and middle finger of the right hand are bent from the first joint and inserted into the holes 16 and 16 'to be used so as to catch the holes at the final points b and b'.

For example, in the case of a right-handed person, pitching is performed by training to push up the pitching practice tool of the present invention while pushing the wall surface of the final points b and b ′ using the fingernail side while the first joint of the finger is bent. The weight of the exercise tool is loaded on the fingertip, and the fingertip can be trained more effectively. Further, by bifurcating from an arbitrary position of the hole to the final points a and b on the center line B from directly above when viewed from the front, a protrusion is formed at the branch point on the center line B. By hooking a fingernail on the protrusion, it is possible to exercise only the fingertip more effectively. By strengthening your fingertips, you can strengthen your grip strength, as well as your muscles around your arms and shoulders, and in the sport that uses your fingertips, you can improve your skills and physical strength.

FIG. 19 is a reference diagram showing a use state when a left-handed person uses the fifth embodiment of the present invention. Spherical body 15, hole 16 for inserting the index finger of the left hand, final points a and b of the hole 16, holes for inserting the middle finger of the left hand, final points a 'and b' of Fig. 14-16 ', center from above when viewed from the front The line B is composed of the center line C from the side as viewed from the front. The index finger of the left hand and the hole 16 into which the index finger enters are represented by a thick dotted line, and the middle finger and the hole 16 'of the left hand are represented by a thin dotted line. The index finger and middle finger of the left hand are bent from the first joint and inserted into the holes 16 and 16 'to be used by hooking them so as to grasp the holes at the final points a and a'.

In various training other than baseball, put the ring finger and little finger into the hole and train the fingertips, and by training with the thumb and index finger inserted into the holes, you can effectively train the grip strength and muscle strength of the necessary parts In sports that use, the size and structure that can be trained anywhere, anytime, anywhere.

  FIG. 20 shows a diagram of release points when a normal ball is held and thrown. It consists of a position c just before the ball leaves the finger and a position d where the finger leaves the ball. Usually, preparation for release starts before c, and the ball leaves the finger at positions c to d.

FIG. 21 shows a diagram of release points when the pitching practice tool of the present invention is thrown. Spherical body 1, position c just before leaving the finger during normal pitching, position d where the ball leaves the finger during normal pitching, release point position e where the spherical body 1 of the present invention leaves the finger, release f Consists of

FIG. 20-c shows a position immediately before the ball is released from the finger when throwing a ball while holding a normal ball, but the pitching practice tool of the present invention still does not release the spherical body from the finger at the position of FIG. 21-c. You are in a state. Also, the release point of the pitching practice tool of the present invention is a position figure 21-e where the ball begins to separate from the finger immediately before the arm is positioned in front of the body, and a position figure 21-f where the ball leaves, and the release point becomes considerably late. ing. The later the release point, the harder the batter is to see the source of the ball, and the more likely it is that the hit will be harder to time. On the other hand, since the release point is early in FIG. 20-d, it is easy for the batter to see the origin of the ball early and to adjust the timing to the ball. In this way, by remembering the position to release your finger from the spherical body, you can grasp the release point when you actually hold the ball and throw it, and try to support the upper body by releasing the ball slowly The lower body can be strung, and a ball with a weight on the lower body can be thrown naturally, making it difficult for the batter to hit.

FIG. 22 shows a swing practice diagram of the fourth embodiment of the pitching practice tool of the present invention. The spherical body 1 is composed of arm trajectories g, h, i, j, and k at the time of swing for throwing the arm from top to bottom. At the time of g, the fingertips are extended and the swing is started with the wrist, arm, and shoulder removed. The fingertip is bent from h, and the fingertip is hooked to the final point of the hole to swing to follow-through. By repeatedly training to stretch and bend the fingertips, grip strength and muscle strength are trained.

  Further, when it is desired to release at a favorite place, the spherical body 1 can be released from the fingertip by releasing the fingertip straight from g to i without bending the finger.

  By holding the spherical body 1 to the end and performing a follow-through operation, the weight of the spherical body 1 and the centrifugal force are applied to the fingertip, and the fingertip, wrist, elbow, arm, shoulder and the like necessary for pitching are trained. Forging around the fingertips increases the pressure of the finger that holds the ball, leading to the effect of reducing the drop of the ball power due to a decrease in grip strength when throwing. Also, by opening your finger at the point of g and putting your finger into the hole, you can remove the force from the upper body at the beginning of the swing, and by pulling the force from the upper body, you can get weight on the lower body, You can practice throwing a ball with a weight on the ball.

The present invention describes a pitching practice tool for training fingertips for baseball pitchers, fielders, and batters, but in addition to baseball, golf, judo, handball, tennis, sumo, badminton, volleyball and other fingertips are used. It is also possible to change the shape for sports use.

DESCRIPTION OF SYMBOLS 1 Spherical body 2, 2 'Hole formed in spherical body 3 Spherical body 4, 4' Hole formed in spherical body 6 Spherical body 6, 6 'Hole formed in spherical body 7 Spherical hole start point 8 Spherical body The formed step 9 The final point 10 of the hole formed in the spherical body 10, The hole 11 formed in the spherical body 11 The starting point 12 of the hole formed in the spherical body 13 The step 13 formed in the spherical body 13 The hole formed in the spherical body End points 14 and 14 ′ of the hole formed in the spherical body 15 and the hole A formed in the spherical body 16 and 16 ′ spherical body A center line B seen from the side C center line seen from the side C center line seen from the side DD Cutting line EE Cutting line a, a 'Final point b of the hole formed in the spherical body, b' Final point c of the hole formed in the spherical body c Position where the release starts with normal pitching d Normal pitching position f book starts away the ball from the finger of pitching practice tool position e present invention from the finger ball leaves The trajectory of the arm during the swing down throw from the top of the arm of the state of use of the pitching practice tool to the bottom of the position g~k the present invention away from the finger of pitching practice tool of Akira

Claims (6)

A spherical body, and two holes that allow the index finger and the middle finger to be inserted into the spherical body from the surface to the deep part .
The two holes are formed so that the spherical bodies are arranged along the center line A from the side when viewed from the front and are not parallel to the center line B from directly above when the spherical body is viewed from the front. ,
Further, the two holes are formed such that an end point portion which is a portion ahead of the first joint in a state where the index finger and the middle finger are inserted is formed to have a diameter larger than that of the start point portion of the hole. Pitching practice tool . Each of the two holes is formed with a stepped portion having an angle that widens from the middle position to the deep portion of the hole, and the end portion is formed following the stepped portion. The pitching practice tool according to claim 1. The said each two holes are formed so that it may each bifurcate from the position in the middle of reaching the said deep part, The said end point part is each formed following the said branched part, The said each hole is characterized by the above-mentioned. Pitching practice tool. The pitching practice tool according to any one of claims 1 to 3, wherein each of the two holes forms a hole path so as to have an angle between an index finger and a middle finger in a state where a hand is naturally opened. The pitching practice tool according to any one of claims 1 to 4, wherein a hole passage for inserting an index finger is formed shorter than a hole passage for inserting a middle finger among the two holes.   The material of the spherical body is iron, casting, resin, wood, rubber, leather, stainless steel, aluminum, The pitching practice tool according to any one of claims 1 to 5, which can be formed of a material such as cork, polystyrene foam, cloth or paper.

Images