JP3037199U - Exercise ball - Google Patents

Abstract

(57) [Abstract] [Problem] [Problem] Since the direction of rotation is stable, it is easy to move linearly toward the target point and is not easily affected by a slight change in the rolling surface of the ball while moving. Providing an exercise ball. SOLUTION: The exercise ball 10 includes a cover member 3 forming a ball outer shell, a core member 2 filled inside the cover member 3, and a thin plate 1 arranged along a cross section passing through the center of the ball. The thin plate 1 has a circular shape and its specific gravity is heavier than that of the core member 2.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an exercise ball used in ball games such as golf, bowling, pool, and croquet.

[0002]

[Prior art]

 In a ball game in which the ball is moved while rolling, the course of the ball is determined by the player's striking technique and the external conditions, that is, golf course ups and downs on the golf course, the elasticity of the table in the case of turf, and the characteristics of the lane in bowling Determined by Therefore, if a player with a skill that cannot read external conditions plays, as shown in Fig. 11, the rotation of the ball is unstable, and even if the player is moving on the correct course, the course will immediately change the course. It may change.

As a conventional ball, as shown in FIG. 10, a core member 2a made of rubber or the like is covered with a cover member 3a which is stiffer than the core member 2a, and the repulsive force of the core member 2a is used as a player's power. Only the golf ball 10a or the like, which can be changed accordingly to increase the flight distance, is publicly known, and a technique for stabilizing the rotation of the ball to go straight ahead has not been known.

[0004]

[Problems to be solved by the device]

 The present invention provides an exercise ball that is stable in the direction of rotation and therefore is easy to move linearly toward a target point and is not easily affected by slight changes in the rolling surface of the ball while moving. The purpose is to do.

[0005]

[Means for Solving the Problems]

 The exercise ball of the present invention comprises a cover member constituting a ball outer shell, a core member filled inside the cover member, and a thin plate arranged along a cross section passing through the center of the ball, and the thin plate is circular. And has a specific gravity larger than that of the core member. When an external force that tries to rotate the ball is applied, the thin plate, which is the heaviest part of the cross section of the ball, tries to be orthogonal to the rotation axis, and as a result, the ball gradually starts to rotate along the circumferential direction of the thin plate. , It moves linearly without shaking to the left or right. Even if a force that changes the trajectory is applied during movement, the trajectory of the ball is difficult to change because the thin plate that receives a greater centrifugal force than other parts tries to continue rotating while standing upright.

Forming protrusions on both sides of the center of the thin plate improves the fixing property between the thin plate and the core member, and facilitates the positioning of the center portion when injection molding the core member on both sides of the thin plate. Therefore, it is desirable. In addition, forming the protrusions on both sides of the peripheral edge of the thin plate improves the fixing property between the thin plate and the core member, and increases the peripheral edge of the thin plate to increase the centrifugal force applied to the thin plate. desirable.

The exercise ball of the present invention may have the following configuration. Curve both sides of the sheet symmetrically. Use thin plates as hollow plates. Forming a thin plate into an annular shape.

[0008]

[Embodiment of the invention]

 1 to 3 show a golf ball 10 according to a first embodiment of the present invention. As shown in FIG. 1 to FIG. 3, the ball 10 has a cover member 3 forming the surface outer shell thereof, a core member 2 filled inside the cover member 3, and a cross section P1 passing through the center of the ball. And a thin plate 1 arranged along the same.

The cover member 3 has a structure similar to that of a normal two-piece ball cover, and is made of a hard rubber or the like. The core member 2 is made of rubber, resin, or the like, which is slightly softer than the cover member 3, and is formed into a spherical shape on both sides of the thin plate 1 by injection molding.

The thin plate 1 is made of a metal whose specific gravity is heavier than that of the core member 2, and has a circular shape as shown in FIG. Further, as shown in FIGS. 2 and 3, on both surfaces of the core member 1, a cylindrical projection 11 is formed at the center thereof, and a ridge 12 is formed along the periphery thereof. Therefore, the thin plate 1 has a heavy weight at the peripheral portion, and the inner portion is lighter than this. Further, the protrusion 11 becomes the center of the spherical mold when the core member 2 is mounted on both sides of the thin plate 1 by injection molding. Then, the thin plate 1 and the core member 2 are firmly fixed by the protrusions 11 and the protrusions 12.

When the ball 10 is hit toward a target, as shown in FIG. 5, initially, the ball 10 rotates along an arbitrary circumference on the surface of the ball according to the posture of the ball 10 and the position where an external force acts. However, when the ball 10 begins to roll forward, the thin plate 1 which is the heaviest in its cross section tries to be orthogonal to the rotation axis, so that the thin plate 1 gradually stands upright on the ground 4 as shown in FIG. 10 rotates in the circumferential direction of the thin plate 1 and moves linearly.

Further, since the thin plate 1 is heavier than the other parts, it is possible to resist an external force when a sufficient rotational force is obtained. Therefore, the rotation direction of the ball 10 is very stable, and the thin plate 1 can be kept on the ground 4. Even if there are many irregularities, it is not easily affected by it and moves on a straight track. Therefore, during golf putting, if the direction in which the ball 10 is first launched is correct, as shown in FIG. 4, the ball 10 goes straight toward the hole without being bent by the grass of the green 5, undulations, etc. .

Further, as shown in FIG. 6, even in a bowling ball 6 that advances while rotating on a lane, its thin plate 1 gradually stands upright, so if the ball 6 is first thrown toward a pin. , The ball 6 goes straight toward the pin, and the influence of the direction of rotation and the characteristics of the lane when the player's hand is released is minimal. Further, as shown in FIG. 7, when the golf ball 10 is shot by the golf club 7, the thin plate 1 of the ball 10 rotating in the air is gradually orthogonal to the rotation axis as in the case of rotating on the ground. When falling on the ground 4, the thin plate 1 is almost upright. After the drop, the thin plate 1 rotates while standing upright, and goes straight toward the target.

FIG. 8 shows a second embodiment of the present invention. The thin plate 1 is made of a hollow plate, and the ridges 12 are not formed on the outer peripheral portions of both surfaces thereof, but only the cylindrical protrusion 11 is formed in the central portion. 9 shows a third embodiment of the present invention, in which the thin plate 1 is formed in an annular shape having a diameter substantially the same as the diameter of the core member 2. Since the other configurations in the second and third embodiments are almost the same as those in the first embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted. In addition to the above-described embodiment, both sides of the thin plate 1 may be symmetrically curved in a concave shape or a convex shape.

[0015]

[Effect of the invention]

 According to the structure described in claim 1, when an external force for rotating the ball is applied, the thin plate, which is the heaviest cross-section of the ball, tries to stand upright with respect to the rotation axis. Gradually, it starts to rotate along the circumferential direction of the thin plate and moves linearly, and even if a force that changes the trajectory is applied during the movement, the thin plate that is heavier than other parts resists external force and rotates as it is. The trajectory of the ball is unlikely to change, and as a result, if the initial direction of travel is correct, the ball will be irrespective of its initial posture, the position on which external force acts, or the slight change in the surface on which the ball rolls. , Go straight to the target point and help the player improve their performance.

According to the configuration described in claim 2, the fixing property between the thin plate and the core member is increased, and when the core member is mounted on both sides of the thin plate by injection molding, the positioning of the mold is facilitated. According to the configuration described in claim 3, the fixing property between the thin plate and the core member is increased, the weight of the peripheral portion of the thin plate is increased, and the centrifugal force applied to the thin plate is increased. Therefore, the rotation of the ball is prevented. More stable.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of an exercise ball according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the above.

FIG. 3 is a sectional view of the above.

FIG. 4 is a perspective view showing the trajectory of a golf ball.

FIG. 5 is a perspective view showing the movement of a golf ball during rotation.

FIG. 6 is a perspective view showing the movement of a bowling ball during rotation.

FIG. 7 is a perspective view showing a movement shot of a golf ball.

FIG. 8 is a sectional view of an exercise ball showing a second embodiment of the present invention.

FIG. 9 is a sectional view of an exercise ball showing a third embodiment of the present invention.

FIG. 10 is a sectional view of a conventional exercise ball.

FIG. 11 is a perspective view showing a trajectory of a conventional exercise ball.

[Explanation of symbols]

 1 Thin Plate 2 Core Member 3 Cover Member 4 Ground 5 Green 6 Bowling Ball 7 Golf Club 10 Golf Ball 11 Projection 12 Projection

Claims (6)

[Utility model registration claims] 1. A cover member constituting a ball outer shell, a core member filled inside the cover member, and a thin plate arranged along a cross section passing through the center of the ball, the thin plate having a circular shape. An exercise ball which is present and has a specific gravity heavier than that of the core member. 2. The exercise ball according to claim 1, wherein protrusions are formed on both sides of the center of the thin plate. 3. The exercise ball according to claim 1, wherein the thin plate has protrusions formed on both sides of the peripheral edge of the thin plate. 4. The exercise ball according to claim 1, wherein both surfaces of the thin plate are symmetrically curved. 5. The exercise ball according to claim 1, wherein the thin plate is a hollow plate. 6. The exercise ball according to claim 1, wherein the thin plate is formed in an annular shape.