JP3072404U - Practice baseball ball - Google Patents

Abstract

(57) [Summary] [Problem] Regarding a practice baseball ball particularly suitable for learning how to use wrists and fingers at the time of pitching, the rotation of the thrown ball can be clearly recognized, and children are interested in pitching practice. Provide a baseball that you can hold. SOLUTION: A flat wing is provided on both sides of a ball in the central axis direction. The wing preferably has a shape that is symmetrical with respect to the central axis, and the root portion of the wing is desirably narrow so as not to interfere with gripping the ball. The two wings
It is preferable that the surfaces are provided on the same surface, and the surface can be formed by a single plate material penetrating the ball. When practicing pitching, grab the ball so that the wings extend horizontally and throw it. If the thrown ball is given a curved rotation, the axis of rotation of the ball becomes oblique, so that the blades fly while turning like a windmill.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a baseball ball used for pitching practice, and particularly to a baseball ball particularly suitable for boys and girls who have just started playing baseball to learn how to use their wrists and fingers when throwing.

[0002]

[Prior art]

 In baseball practice, pitching practice is indispensable, especially for boys and girls who have just started playing baseball, and it is important to acquire proper body movements when throwing a ball. The pitching motion is performed using the whole body, but the speed and direction of the ball are changed by the movement of the wrist and fingers, especially when the ball leaves the hand, and the ball is given various rotations at various directions and speeds . The direction and speed of the ball can be easily recognized by the throwing person, but it is difficult for a beginner to realize how the throwing ball is rotating.

In so-called youth baseball performed by elementary school children, pitchers are prohibited from throwing curves. Exercising a curve that twists the wrist and gives the ball a strong spin can have an adverse effect on the growing body, making the course of the ball unstable and easily harming catchers and batters. Above all, throwing a fast and accurate ball with your wrist is the basis of the pitching movement.

However, beginners do not know how to use their wrists and fingers accurately, and forcibly try to throw a fast ball using their wrists, making it difficult to correct the pitching form. In particular, the rotation of the ball is difficult for the throwing person to recognize, so it is not possible to recognize how the ball will rotate if it is thrown, and it is very difficult to correct this. Therefore, when throwing an object, they try to throw a kamaboko board so that they can clearly see how it rotates.

[0005]

[Problems to be solved by the invention]

 However, the Kamaboko board has a slightly different shape when throwing the finger than when throwing the ball, and has a larger air resistance and lighter weight than the ball, so the flying state is considerably different from the ball. It is difficult to grasp the correlation with the time of throwing the ball. As a result, boys and girls could not fully understand the meaning of throwing the kamaboko board, and the action of throwing the kamaboko board did not lead to the action of throwing the ball. There are disadvantages that are unlikely to occur.

[0006] This invention can throw the ball at exactly the same interval as when throwing a normal ball, the rotation of the thrown ball can be clearly recognized by the pitcher himself, and the children are interested in pitching practice The goal is to provide a baseball ball for pitching practice that can have a ball.

[0007]

[Means for Solving the Problems]

 The baseball ball of the present invention solves the above problem by arranging two wings symmetrically with respect to the center on a ball of the same size and slightly lighter weight as a ball used in a normal practice or game. Solved. The wings 3 are arranged on both sides of the ball so as to extend in the direction of one central axis passing through the center of the ball, and have a flat plate shape symmetrical with respect to the central axis on a plane including the central axis. Shall be provided.

[0008] The wing 3 used in the early stage of training is preferably large in area, and when practicing to throw a fast ball, a small area is preferred. The plane shape of the wing is preferably symmetrical with respect to the central axis, and the root portion of the wing is desirably narrow so as not to obstruct the grip of the ball. The two wings are preferably provided so that their surfaces are on the same surface, and can be formed of one plate material penetrating the ball. The material of the wing may be various depending on the ball manufacturing process, but if the ball is formed integrally, it will necessarily be made of rubber.If it is formed separately from the ball and assembled, a plywood or A synthetic resin plate or the like can also be used.

When practicing pitching using a ball having the above structure, the ball is grasped and thrown so that the wings extend in the horizontal direction. A correctly thrown straight sphere rotates in the opposite direction about a horizontal axis perpendicular to the flight direction (rotation in the direction in which the plane in the direction of travel of the ball moves upward). Therefore, when a straight ball is thrown with the practice ball of the present invention, if it is thrown correctly, the wings will keep the horizontal state, and the wings will fly while rotating around the horizontal axis . On the other hand, when the thrown ball is given a curvilinear rotation, the axis of rotation of the ball becomes oblique, so that the blades fly while turning like a windmill. Therefore, even a beginner can easily recognize the direction and speed of the ball rotating, and clearly recognize how the ball rotates when a straight ball is thrown. Can be. Therefore, the relationship between the movement of the hand and the rotation of the ball when pitching can be easily understood, and the correct pitching operation can be learned in a short time.

[0010] If the both sides of the wing are colored in different colors, it becomes easier to recognize the direction of rotation of the ball.

[0011]

[Embodiment of the invention]

 1 to 3 are views showing a first embodiment of the present invention. FIG. 1 is a perspective view, FIG. 2 is a plan view, and FIG. 3 is a sectional front view cut at the center. The ball main body 2 is a ready-made soft ball, and a flat wing 3 extending on both sides of the ball 1 is formed by penetrating and fixing a substantially punch-shaped plate material in plan view to the soft ball. In the structure of the first embodiment, the wings 3 can be formed of a veneer plate or a synthetic resin plate having appropriate strength. This structure is suitable for manufacturing the practice ball of the present invention by hand.

4 and 5 show a second embodiment of the present invention. FIG. 4 is a plan view and FIG. 5 is a sectional front view. The second embodiment shows an example in which the wing 3 is integrally formed of the same material as the ball body 2. In the case of this structure, deep grooves are provided on both sides of the ball from the mating surface of the mold for molding the ball, and the wing 3 is integrally formed with the ball body 2. Due to the draft angle provided in the mold, the blade 3 has a thicker cross section at the center and a thinner side edge, as shown in FIG.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is a plan view of the first embodiment.

FIG. 3 is a cross-sectional front view of the first embodiment.

FIG. 4 is a plan view of a second embodiment.

FIG. 5 is a sectional front view of the second embodiment.

FIG. 6 is a sectional view of a wing according to a second embodiment.

[Explanation of symbols]

 2 Ball body 3 Wings

Claims (4)

[Utility model registration claims] 1. A practice baseball ball having two flat wings (3) symmetric with respect to the center of the ball body on one center axis passing through the center of the ball body (2). 2. The training wing according to claim 1, wherein the wing has a plane shape symmetrical with respect to the central axis, and the surfaces of the two wings are on the same plane. Baseball ball. 3. The practice baseball ball according to claim 1, wherein the wings (3) have a flat shape at the base portion. 4. The practice baseball ball according to claim 1, wherein the wings (3) are formed of the same material as the ball body (2).