KR100799702B1 - Device for training ball game - Google Patents

Abstract

Practice equipment for a ball game is provided to extend a service life of golf practice equipment and a golf club, and to allow a user to estimate completely whether an exact impact is carried out during a swing motion of a golf. Practice equipment for a ball game includes: a supporting plate(10), formed in a rectangular shape; a supporting bar(20), formed in a shape that a straight bar is bent at a right angle in a determined position, and attached onto the supporting plate in a fixed manner; a first cylindrical rotor(30), mounted on a frontal end of the supporting bar in a rotatable manner; a first connection(40), connected to the first cylindrical rotor vertically in a downward direction; a pair of second cylindrical rotors(50), mounted on both ends of a horizontal part of the first connection respectively in a rotatable manner; a pair of second connections(60), attached to the second cylindrical rotors respectively and vertically in a downward direction; and a pair of golf balls(70), attached to a lower end of the second connections respectively in a rotatable manner.

Description

Ball practice device {DEVICE FOR TRAINING BALL GAME}

1 is a perspective view of a golf practice apparatus of a first embodiment of the present invention.

2 is a front view of the golf practice apparatus of FIG.

3 is a side view of the golf practicing apparatus of FIG.

4 is a cross-sectional view of the golf ball rotatably configured in the golf practicing apparatus of FIG.

5 is a perspective view showing the rotatable direction of the rotatable portion in the golf practice apparatus of FIG.

Fig. 6 is a perspective view of the golf practicing device of the second embodiment of the present invention.

FIG. 7 is a perspective view of a golf practice apparatus of the form in which the golf ball of the golf practice apparatus of FIG. 1 is replaced with a two-layer structure golf ball made of only a transparent material.

8 is a golf practice apparatus of the golf practice apparatus of FIG. 1 is replaced with a golf ball having a central identification portion having a different color from the golf ball in the central portion and formed slightly higher than the surface of the golf ball in the center portion of the golf practice apparatus of FIG. Perspective view.

FIG. 9 is a perspective view of a golf practice apparatus of the golf practice apparatus of FIG. 1 in which a golf ball is replaced with a golf ball displaying a longitude line and a latitude line on a surface of the golf ball.

FIG. 10 is a perspective view of a golf practice device in which a hemispherical golf ball of the same size as a golf ball is attached to the golf practice device of FIG.

FIG. 11 is a perspective view of a golf practice device having a disc-shaped golf ball of the same size as a golf ball instead of a golf ball in the golf practice device of FIG. 1.

12 is a diagram for practicing golf swing using the golf practice apparatus of the first embodiment of the present invention.

FIG. 13 is a drawing for practicing soccer shooting using a ball game practice apparatus of the present invention implemented as a soccer practice apparatus as a third embodiment of the present invention.

14 is a diagram for practicing the stroke of tennis using the ball game practice apparatus of the present invention implemented as a tennis practice device of a fourth embodiment of the present invention.

The present invention can effectively practice the swinging action of golf, the shooting action of soccer, or the (forehand or backhand) stroke action of tennis, and the swinging posture of golf, the shooting position of soccer or the (forehand or backhand) stroke of tennis. The present invention relates to a practice apparatus for various ball games. More specifically, the present invention is configured to simply check whether the correct impact was made during the swing operation of the golf, the shooting operation of the football or the stroke operation of the tennis, so that the swinging position of the golf, the shooting position of the football or the stroke position of the tennis It is to provide a ball game practice device designed to correct.

However, hereinafter, the present invention will be described focusing on the golf practice apparatus and the application as a soccer practice apparatus and a tennis practice apparatus is to replace a golf ball with a soccer ball or a tennis ball in the configuration of the golf practice apparatus.

As a conventional golf practice device, the device disclosed in the Republic of Korea Utility Model Publication No. 1991-0000180 is a support, a support plate on which the support is fixed, an elongate connection rotatably connected to the front end of the support, and fixed to the end of this elongate connection It consists of a golf ball. This device is configured so that even if the golfer hits the golf ball, the golf ball does not fly and rotates around the support, so it can be easily installed in a narrow space to practice the swing of the golf and the golfer (in some cases, It is useful in that it does not have to collect a golf ball hit by a golf practice shop and does not need to prepare a lot of golf balls.

However, the apparatus has a disadvantage in that it is not possible to determine whether an accurate impact is made when the golf ball is hit, that is, whether a slice is generated.

As a remedy of these drawbacks, Korean Utility Model Publication No. 1996-0010601 and Japanese Patent Laid-Open Publication No. 2004-321631 disclose a golf practice apparatus that can determine whether or not to slice during the golf swing operation. These golf practice apparatus is substantially the same configuration as the apparatus disclosed in the Republic of Korea Utility Model Publication No. 1991-0000180, the inclination of the golf ball is fixed by a certain angle range with respect to the plane perpendicular to the support centered on the support It is different in that it is comprised so that it may rotate and lose.

However, in the conventional golf practice apparatus as described above, since the golf ball is fixed to the connecting portion, when the golf club does not strike the golf ball very accurately, the stress is concentrated on the connecting portion of the golf ball and the connecting portion, It is easy to break, and the reaction force to the stress acts on the golf club, and an unnecessary impact is applied to the golf club. As a result, there is a problem that the lifespan of the golf practice device and the golf club is shortened, thereby causing an additional cost burden.

In some cases, it is also necessary to strike the golf ball while giving a spin. In the conventional golf practice apparatus as described above, since the golf ball is fixed to the connecting portion, the golf ball cannot be spun, and if the golf ball spins, When hitting the golf ball in the form of giving a stress as described above, the stress is concentrated on the connection portion of the golf ball and the connection is easy to break the connection portion, the reaction force against the stress acts on the golf club, unnecessary impact on the golf club This applied problem occurs.

In addition, even in the apparatus disclosed in Korean Utility Model Publication No. 1996-0010601 and Japanese Patent Laid-Open Publication No. 2004-321631 which can check the slice among the conventional golf practice apparatus, whether or not the slice is a golf ball rotating around the support Since it is determined by visually confirming the rotation angle of the plane perpendicular to the support of the large slice, the large slice can be visually confirmed, but the small slice has a disadvantage in that the slice cannot be known. In other words, there is a limit in determining whether or not an accurate impact is made during the golf swing by the above apparatus.

An object of the present invention is to solve the problems of the conventional golf practice apparatus as described above, it is possible to extend the life of the golf practice apparatus and golf clubs, and most of all, whether or not the accurate impact was made during the golf swing operation It is to provide a golf practice device configured to determine.

In order to achieve the above object, according to the first embodiment of the present invention; A support of the "a" shape fixedly attached to the support plate; A first cylindrical rotating part mounted to the front end of the support to be rotatable relative to the support; A first connecting portion having a “ㅗ” shape vertically coupled to the first cylindrical rotating part; A pair of second cylindrical rotating portions respectively mounted at both ends of the horizontal portion to be rotatable with respect to the horizontal portion of the first connecting portion; A pair of straight second pairs coupled to the pair of second cylindrical rotary parts vertically downwards; And a pair of golf balls attached to a lower end of the pair of second connecting portions so as to be rotatable with respect to the pair of second connecting portions.

The first cylindrical rotating part is mounted to the front end of the support in an eccentric state so that the first cylindrical rotating part can be aligned exactly in the vertical direction due to the rotational moment due to gravity. As a result, the first connecting portion connected with the first cylindrical rotating portion is also exactly aligned in the vertical direction.

A screw portion is formed at an upper end of the vertical portion of the first connector of the "ㅗ" shape, and a screw portion is formed at an engagement hole of the first cylindrical rotating part engaged with the upper end of the first connection portion, so that the first connection portion is formed. And the first cylindrical rotating portion is screwed and can adjust the length of the first connecting portion by adjusting the threaded coupling length.

The pair of golf balls are provided with a vertical through hole in the pair of golf balls so as to be rotatable with respect to the second connecting part, and a cylindrical bearing at a lower end of the second connecting part fitted into the through hole. Is equipped. The second connecting portion is provided with a stopper for preventing falling out at portions corresponding to both ends of the cylindrical bearing, and a cylindrical plastic is inserted between the cylindrical bearing and the through hole to prevent loosening.

The pair of golf balls are aligned with and in contact with each other in parallel with the horizontal portion of the first connecting portion at the same height. That is, the pair of golf balls are in point contact with each other.

According to the configuration as described above, since the golf ball can be rotated (spin) relative to the second connection portion, unlike the conventional golf practice device, there is no fear that the connection portion between the golf ball and the connection portion is broken even when the golf ball is not hit accurately. Unnecessary impacts on the golf clubs. In addition, you can strike while giving a spin to the golf ball, you can practice various types of swing.

On the other hand, if the golf club does not make an accurate impact on the golf ball during the swing operation, the phenomenon that the bending does not extend straight in the direction of the ball, that is, the slice occurs. In order to prevent such a slice should be able to check whether or not such a slice even during the practice of the golf swing.

According to the apparatus of the present invention as described above, the golf ball can be rotated with respect to the "b" shaped support, and also can be rotated with respect to the "J" shaped first connection. In other words, the golf ball is configured to be rotated in the impact direction (hit direction) and is also configured to be rotated in the direction perpendicular to the impact direction, so that it is easy to check whether the accurate impact has been made. .

More specifically, the golf ball of the golf practice device of the present invention rotates only with respect to the support of the "b" shape at the time of accurate impact. That is, it only rotates in the hitting direction. However, if the impact is not accurate, the golf ball rotates in the hitting direction and at the same time also in a direction perpendicular to the hitting direction. 1 connection also rotates). According to the inaccurate degree of impact, the rotational force component in the batting direction and the rotational force component in the direction perpendicular to the batting direction are determined. That is, when the inaccuracy of the impact is severe, the golf ball may not rotate in the batting direction but only swing in the batting direction and rotate only in the direction perpendicular to the batting direction.

In the apparatus of the present invention, the pair of golf balls are configured to rotate in the direction perpendicular to the hitting direction and the hitting direction as described above in a state of being in contact with the point contact state, so that an accurate impact is achieved at the time of swinging. If not, the rotational force component in the direction perpendicular to the hitting direction is necessarily generated, so that even small slices can be reliably captured.

In addition, this invention includes carrying out by deforming in the form which removed the 2nd cylindrical rotation part among the structures of said 1st Embodiment. In such a modified embodiment, it is preferable to use the center part of a pair of golf balls tied with a string.

On the other hand, in order to maximize the effect of the golf practice apparatus of the present invention, the shape of the golf ball may be modified and used as follows.

For example, in order to clearly distinguish the center line of the golf ball, a golf ball having a two-layer structure made of only a transparent material may be used.

And, if the center of the golf ball has a color different from the color of the golf ball and using a golf ball of the type having a central identification portion (thin band portion) formed slightly higher than the surface of the golf ball the center of the golf ball The part (the part to be impacted) can be clearly represented to help find the impact point of the golf ball.

In addition, it is also possible to use a golf ball in the form of a longitude line and a latitude line on the surface of the golf ball to distinguish the impact point in the golf ball.

Although having the same configuration as the above-described overall configuration, the golf ball of the above configuration may be replaced with a soccer practice device (third embodiment of the present invention), or the golf ball of the above configuration may be replaced with a tennis ball. It can also be implemented with a tennis practice device (fourth embodiment of the present invention). In particular, in the fourth embodiment of the present invention implemented as a tennis practice device, it is preferable to use the tennis ball with a suitable height.

In order to practice golf more efficiently through the golf practice apparatus of the present invention, instead of the normal golf ball, only the lower half of the golf ball (hereinafter referred to as "semi-spherical golf ball") or golf instead of the normal golf ball It may be desirable to use a disk form (hereinafter referred to as " disc golf ball "), which remains only about 5 mm to 7 mm in the central portion of the ball.

The hemispherical golf balls and disc-shaped golf balls have a diameter equal to the diameter of the golf ball and a weight equal to the weight of the golf ball. In golf, hitting the center of the golf ball accurately with the golf club is most important, so if you practice swinging using the hemispherical golf ball or disc-shaped golf ball as described above, the practice of naturally hitting the center of the golf ball accurately.

On the other hand, according to 2nd Embodiment of this invention, the golf practice apparatus from which the golf ball arrangement | positioning state differs from 1st Embodiment is provided. The configuration of this second embodiment is basically the same as that of the first embodiment, except that the pair of golf balls are spaced apart from each other. However, in the second embodiment, when the pair of golf balls are separated by a predetermined distance or more, the height of the golf ball hit by the golf ball secondaryly by the golf ball is slightly higher than the height of the golf ball directly hit by the golf club. It is desirable to adjust high. A more detailed explanation of this height difference is provided below.

And in the device of the present invention, the pair of second connecting portions are preferably made of a flexible material such as a rope.

(Example)

Hereinafter, with reference to the accompanying drawings, the present invention will be described in more detail.

Figure 1 schematically shows the overall configuration of the golf practice apparatus of the present invention. As shown in FIG. 1, the golf practice apparatus of the present invention has a rectangular support plate 10, a support plate 20 having a generally “a” shape fixedly attached to the support plate 10, and the support 20. A first cylindrical rotary part 30 mounted at the front end of the support to be rotatable relative to the supporter, a first coupling part 40 having a “ㅗ” shape vertically coupled to the first cylindrical rotary part 30, On the pair of second cylindrical rotating portions 50 and the pair of second cylindrical rotating portions 50 which are respectively mounted at both ends of the horizontal portion so as to be rotatable with respect to the horizontal portion of the first connecting portion 40. Attached to the lower ends of the pair of second connecting portions 20 so as to be rotatable with respect to the pair of second connecting portions 60 and the pair of second connecting portions 20 which are vertically coupled downwardly. It consists of a pair of golf balls 70.

Since the golf practice apparatus of the present invention was developed so that it can be conveniently placed and used anywhere, the support plate 10 is a steel plate having a constant thickness and a constant width in order for the support plate 10 to function properly as a support structure. It is preferable to have a sufficient weight to be configured. However, in some cases, the support plate 10 may have a fastening structure to be fixed at a predetermined place. For example, four corners of the support plate 10 may be drilled with a through hole to be fixed to the floor with bolts.

As can also be seen in Figure 1, the first cylindrical rotary part 30 is mounted in an eccentric state on the front end of the support 20, the first cylindrical rotary part 30 has a rotational moment due to gravity Can be aligned exactly vertically. As a result, the first connecting portion 40 having a "ㅗ" shape connected to the first cylindrical rotating portion 30 is also exactly aligned in the vertical direction. In FIG. 2, the golf practicing apparatus of FIG. 1 is illustrated in a front view to more clearly understand the eccentric connection structure of the first cylindrical rotation part 30.

Although not shown in the drawings, the upper end of the first connecting portion 40 and the engaging hole of the first cylindrical rotating portion 30 coupled thereto is provided with a screw portion, so that the first connecting portion 40 adjusts the length thereof. It is supposed to be.

In FIG. 3 the device of FIG. 1 is shown in side view to clearly show the direction of rotation of the golf ball 70 relative to the second cylindrical rotation 50.

In FIG. 4, a golf ball 70 rotatably configured with respect to the straight second connection part 60 is shown in cross section. A vertical through hole is formed in the golf ball 70 so that the golf ball 70 can rotate (spin) with respect to the second connecting portion 60. The cylindrical hole 72 is formed in the through hole. Is fitted and attached to the lower end of the second connecting portion 60. The second connecting portion 60 is attached to the anti-falling fasteners 61 and 62 corresponding to both ends of the cylindrical bearing 72. In addition, a cylindrical plastic 71 is sandwiched between the cylindrical bearing 72 and the through hole. The cylindrical plastic 71 is not closely adhered to the through hole of the golf ball 70 by the cylindrical plastic 71. It is preferable to have some elasticity because it is a member for preventing it from being loose without being. The pair of golf balls 70 are aligned in parallel with the horizontal portion of the first connecting portion 40 at the same height and abut the point contact state.

Meanwhile, in FIG. 5, the rotatable direction of the rotatable portion of the golf training apparatus of FIG. 1 is indicated by an arrow. That is, the first cylindrical connecting portion 30 and all elements directly or indirectly coupled to the first cylindrical connecting portion 30 (that is, the first connecting portion 40, the second cylindrical rotating portion 50, and the second connecting portion 60). ) And the golf ball 70) are rotatable in the direction of arrow A with respect to the "b" shaped support 20, and are directly and indirectly connected to the second cylindrical connecting portion 50 and the second cylindrical connecting portion 50. All coupled elements (i.e., the second connection 60 and the golf ball 70) are rotatable in the direction of arrow B with respect to the first connection 40 of the "ㅗ" shape, and a pair of golf balls 70 ) Is rotatable in the direction of the arrow C with respect to the second connection portion 60 of the straight form.

As described above, the golf ball 70 can be rotated with respect to the "b" shaped support 20, and at the same time can also rotate with respect to the "상기" shaped first connection portion (40). In other words, the golf ball 70 is configured to rotate in the impact direction (arrow A direction) and is also configured to rotate in the direction perpendicular to the impact direction (arrow B direction), so that the accurate impact You can simply check whether or not.

More specifically, the golf ball 70 of the golf practice device of the present invention rotates only in the direction of arrow A with respect to the "a" shaped support 20 at the time of an accurate impact. That is, it only rotates in the hitting direction. However, if the correct impact is not made, the golf ball 7 rotates or shakes in the hitting direction (ie, arrow A direction) while simultaneously rotating or shaking in the direction perpendicular to the hitting direction (ie, arrow B direction). do. According to the inaccurate degree of impact, the rotational force component in the batting direction and the rotational force component in the direction perpendicular to the batting direction are determined. As described above, in the apparatus of the present invention, the pair of golf balls 70 are in contact with each other in the point contact state, and the direction perpendicular to the hitting direction (i.e., arrow A direction) and the hitting direction as described above (i.e., Since it is configured to rotate in the direction of arrow B, if a precise impact is not achieved at the time of swing, the rotational force component in the direction perpendicular to the batting direction (that is, the direction of arrow B) must be generated. Slices can also be captured with certainty.

The present invention can also be carried out by deforming to a form in which the second cylindrical rotating part is removed from the configuration of the first embodiment. That is, the pair of second connecting portions in a straight line shape are directly fixed to both ends of the horizontal portion of the first connecting portion, respectively, and may be implemented in a form of being coupled vertically downward. In this modified embodiment, rotation in the arrow B direction in FIG. 5 becomes impossible. In such a modified embodiment, it is preferable to use the center part of a pair of golf balls tied with a string.

6 schematically shows a second embodiment of the golf practicing apparatus of the present invention. This second embodiment is the same as the configuration of the first embodiment except that the pair of golf balls 70 are spaced apart from each other as shown in FIG. 6. 6, the height of the golf ball (right golf ball on the drawing) slightly hit by the golf ball is slightly higher than the height of the golf ball (going left golf ball on the drawing) directly hit by the golf club. have. The height difference "L" shown in the figure is mathematically expressed as follows.

That is, the length of the second connecting portion 60 coupled to the left golf ball is S,

When the left golf ball hit by the golf club directly hits the right golf ball, the inclination angle with respect to the vertical direction of the second connecting portion 60 coupled with the left golf ball is θ,

L = S-S COSθ ... (1)

However, when the distance between the pair of golf balls 70 is not large, the height difference "L" can be ignored.

In this second embodiment, it is preferable that the second connecting portion 60 of the components of the golf training apparatus of the present invention is made of a flexible material such as a rope.

On the other hand, in order to maximize the effect of the golf practice apparatus of the present invention, the shape of the golf ball may be modified and used as follows.

For example, as shown in FIG. 7, only the upper half of the golf ball may be made of a two-layer golf ball 70 made of a transparent material. That is, if the upper half of the golf ball is made of a transparent material and the lower half of the golf ball is made of a normal golf material, the center line of the golf ball can be clearly distinguished, so that the impact point of the golf ball can be clearly identified. There is an advantage.

And, as shown in Figure 8, the central portion of the golf ball has a color different from the color of the golf ball and has a golf ball 70 of the type having a central identification portion formed slightly higher than the surface of the golf ball to use It may be. In the case of the golf ball as described above, it is possible to clearly represent the central portion (part to be impacted) of the golf ball to help find the impact point of the golf ball.

In addition, as shown in FIG. 9, in order to distinguish the impact point from the golf ball, a golf ball 70 having a longitude line and a latitude line may be used on the surface of the golf ball.

10 and 11 show devices in which the hemispherical golf ball 70 'and the disc shaped golf ball 70 "are attached instead of the conventional golf ball 70. These devices are used for more efficient golf. Since it is intended for practice, the hemispherical golf ball 70 'and the discoid golf ball 70 "preferably have the same diameter as the diameter of the golf ball 70 and the same weight as the weight of the golf ball 70. On the drawing, the thickness of the disc-shaped golf ball 70 "is somewhat exaggerated, but in reality, it is preferable that it is a thin disc of about 5 mm to 7 mm thick. In golf, it is preferable to hit the center of the golf ball with the golf club correctly. Since it is most important, if you practice swing using the hemispherical golf ball 70 'and the disk-shaped golf ball 70 "as described above, it is a natural hitting the center of the golf ball exactly.

12 illustrates a golf swing practice using the golf practice apparatus of the first embodiment of the present invention.

FIG. 13 is a diagram illustrating a shooting practice of soccer using a ball practice device of the present invention implemented as a soccer practice device according to a third embodiment of the present invention. The soccer practice device of the third embodiment of the present invention has the same configuration as the golf practice device of the first embodiment, and replaces only the golf ball with the soccer ball.

Figure 14 is a diagram showing the practice of the stroke stroke of the tennis using the ball game practice apparatus of the present invention implemented by the tennis practice device of the fourth embodiment of the present invention. The tennis practice apparatus of the fourth embodiment of the present invention has the same configuration as the golf practice apparatus of the first embodiment, and replaces only the golf ball with the tennis ball. In particular, in this tennis practice apparatus, as shown in the figure, the height of the tennis ball should be appropriately used.

The technical scope of the present invention is not limited to the above embodiments, but includes various modified embodiments that can be implemented by those skilled in the art.

For example, the second connecting portion 60 itself may be configured to rotate (spin) like the golf ball 70 with respect to the connecting portion with the second cylindrical rotating portion 50.

In addition, the same effect can be expected even if any other ball is attached in place of the golf ball in the above configuration, and can be implemented as a practice apparatus of various ball games in addition to the above-described embodiment.

According to the configuration as described above, it is possible to extend the life of the golf practice device and the golf club, it is possible to perfectly determine whether the correct impact was made during the golf swing operation, it is very helpful in correcting the swing posture. That is, according to the apparatus of the present invention, any fine slices generated during the golf swing can be accurately identified.

When the device of the present invention is configured as a soccer practice device or a tennis practice device, it is possible to perfectly determine whether an accurate impact has been made during the shooting action of the soccer ball or the (forehand or backhand) stroke operation of the soccer ball. This is a great help in correcting your shooting posture and your tennis posture.

Claims (12)

Rectangular support plate; A support of the "a" shape fixedly attached to the support plate; A first cylindrical rotating part mounted to the front end of the support to be rotatable relative to the support; A first connecting portion having a “ㅗ” shape vertically coupled to the first cylindrical rotating part; A pair of second cylindrical rotating portions respectively mounted at both ends of the horizontal portion to be rotatable with respect to the horizontal portion of the first connecting portion; A pair of straight second pairs coupled to the pair of second cylindrical rotary parts vertically downwards; And A pair of golf balls attached to a lower end of the pair of second connectors so as to be rotatable relative to the pair of second connectors; It consists of The first cylindrical rotating part is mounted in an eccentric state at the front end of the support such that a rotational moment due to gravity acts and can be aligned exactly in the vertical direction; A threaded portion is formed at an upper end of the first connecting portion and an engagement hole of the first cylindrical rotating portion coupled thereto so as to adjust the length of the first connecting portion; The pair of golf balls are provided with a vertical through hole so that the pair of golf balls are rotatable with respect to the second connecting portion, and a cylindrical bearing is provided at the lower end of the second connecting portion fitted into the through hole. It is attached, the second connection portion is attached to the anti-falling fasteners corresponding to both ends of the cylindrical bearing, a cylindrical plastic for preventing looseness between the cylindrical bearing and the through hole is fitted, And the pair of golf balls are aligned with and parallel to the horizontal portion of the first connection portion at the same height so as to be in contact with each other. Rectangular support plate; A support of the "a" shape fixedly attached to the support plate; A first cylindrical rotating part mounted to the front end of the support to be rotatable relative to the support; A first connecting portion having a “ㅗ” shape vertically coupled to the first cylindrical rotating part; A pair of second cylindrical rotating portions respectively mounted at both ends of the horizontal portion to be rotatable with respect to the horizontal portion of the first connecting portion; A pair of straight second pairs coupled to the pair of second cylindrical rotary parts vertically downwards; And A pair of golf balls attached to a lower end of the pair of second connectors so as to be rotatable relative to the pair of second connectors; It consists of The first cylindrical rotating part is mounted in an eccentric state at the front end of the support such that a rotational moment due to gravity acts and can be aligned exactly in the vertical direction; A threaded portion is formed at an upper end of the first connecting portion and an engagement hole of the first cylindrical rotating portion coupled thereto so as to adjust a length of the first connecting portion; The pair of golf balls are provided with a vertical through hole so that the pair of golf balls are rotatable with respect to the second connecting portion, and a cylindrical bearing is provided at the lower end of the second connecting portion fitted into the through hole. It is attached, the second connection portion is attached to the anti-falling fasteners corresponding to both ends of the cylindrical bearing, a cylindrical plastic for preventing looseness between the cylindrical bearing and the through hole is fitted, And the pair of golf balls are spaced apart from each other along a direction parallel to the horizontal portion of the first connecting portion. According to claim 1 or 2, Golf practice apparatus characterized in that only the upper half of the pair of golf balls made of a transparent material so as to clearly distinguish the center line of the pair of golf balls. 3. The golf ball according to claim 1 or 2, wherein the central part of the pair of golf balls has a different color from that of the golf ball so as to clearly represent the central part of the pair of golf balls. Golf practice device characterized in that it has a central identification portion formed slightly higher. The golf practice apparatus according to any one of claims 1 to 3, wherein a longitude line and a latitude line are displayed on the surfaces of the pair of golf balls so as to distinguish the hitting positions of the pair of golf balls. . Rectangular support plate; A support of the "a" shape fixedly attached to the support plate; A first cylindrical rotating part mounted to the front end of the support to be rotatable relative to the support; A first connecting portion having a “ㅗ” shape vertically coupled to the first cylindrical rotating part; A pair of second cylindrical rotating portions respectively mounted at both ends of the horizontal portion to be rotatable with respect to the horizontal portion of the first connecting portion; A pair of straight second pairs coupled to the pair of second cylindrical rotary parts vertically downwards; And A pair of hemispherical golf balls having a diameter equal to the diameter of the golf ball and a weight equal to the weight of the golf ball and attached to a lower end of the pair of second connecting parts to be rotatable with respect to the pair of second connecting parts; It consists of The first cylindrical rotating part is mounted in an eccentric state at the front end of the support such that a rotational moment due to gravity acts and can be aligned exactly in the vertical direction; A threaded portion is formed at an upper end of the first connecting portion and an engagement hole of the first cylindrical rotating portion coupled thereto so as to adjust a length of the first connecting portion; The pair of hemispherical golf balls is formed with a vertical through hole in the pair of hemispherical golf balls so as to be rotatable with respect to the second connection part, and a cylindrical portion is provided at a lower end of the second connection part fitted into the through hole. A bearing is mounted, and the second connecting portion is provided with anti-falling fasteners corresponding to both ends of the cylindrical bearing, and a cylindrical plastic is inserted between the cylindrical bearing and the through hole to prevent loosening. And the pair of hemispherical golf balls are aligned with and parallel to the horizontal portion of the first connection portion at the same height so as to be in contact with each other. Rectangular support plate; A support of the "a" shape fixedly attached to the support plate; A first cylindrical rotating part mounted to the front end of the support to be rotatable relative to the support; A first connecting portion having a “ㅗ” shape vertically coupled to the first cylindrical rotating part; A pair of second cylindrical rotating portions respectively mounted at both ends of the horizontal portion to be rotatable with respect to the horizontal portion of the first connecting portion; A pair of straight second pairs coupled to the pair of second cylindrical rotary parts vertically downwards; And A pair of disc-shaped golf balls having a diameter equal to the diameter of the golf ball and a weight equal to the weight of the golf ball and attached to a lower end of the pair of second connecting parts to be rotatable with respect to the pair of second connecting parts; It consists of The first cylindrical rotating part is mounted in an eccentric state at the front end of the support such that a rotational moment due to gravity acts and can be aligned exactly in the vertical direction; A threaded portion is formed at an upper end of the first connecting portion and an engagement hole of the first cylindrical rotating portion coupled thereto so as to adjust a length of the first connecting portion; The pair of disc-shaped golf balls is provided with a vertical through hole in the pair of disc-shaped golf balls so that the pair of disc-shaped golf balls are rotatable with respect to the second connection part, and a cylinder is provided at a lower end of the second connection part fitted into the through hole. A bearing is mounted, and the second connecting portion is provided with anti-falling fasteners corresponding to both ends of the cylindrical bearing, and a cylindrical plastic is inserted between the cylindrical bearing and the through hole to prevent loosening. And the pair of disc-shaped golf balls are aligned with and parallel to the horizontal portion of the first connection portion at the same height so as to be in contact with each other. The method according to any one of claims 1, 2, 6 or 7, And the pair of second connecting portions are made of a flexible material such as a rope. Rectangular support plate; A support of the "a" shape fixedly attached to the support plate; A cylindrical rotary part mounted to the front end of the support to be rotatable relative to the support; A first connecting portion having a “ㅗ” shape that is vertically coupled to the cylindrical rotating portion; A pair of straight second pairs fixed to both ends of the horizontal portion of the first coupler and vertically coupled to each other; And A pair of golf balls attached to a lower end of the pair of second connectors so as to be rotatable relative to the pair of second connectors; It consists of The cylindrical rotation part is mounted in an eccentric state at the front end of the support such that a rotational moment due to gravity acts and can be aligned exactly in the vertical direction; A threaded portion is formed at an upper end of the first connecting portion and an engagement hole of the cylindrical rotating portion coupled thereto so as to adjust the length of the first connecting portion; The pair of golf balls are provided with a vertical through hole so that the pair of golf balls are rotatable with respect to the second connecting portion, and a cylindrical bearing is provided at the lower end of the second connecting portion fitted into the through hole. It is attached, the second connection portion is attached to the anti-falling fasteners corresponding to both ends of the cylindrical bearing, a cylindrical plastic for preventing looseness between the cylindrical bearing and the through hole is fitted, And the pair of golf balls are aligned with and parallel to the horizontal portion of the first connection portion at the same height so as to be in contact with each other. 10. The golf practice device according to claim 9, wherein the centers of the pair of golf balls are bundled in a row. Rectangular support plate; A support of the "a" shape fixedly attached to the support plate; A first cylindrical rotating part mounted to the front end of the support to be rotatable relative to the support; A first connecting portion having a “ㅗ” shape vertically coupled to the first cylindrical rotating part; A pair of second cylindrical rotating portions respectively mounted at both ends of the horizontal portion to be rotatable with respect to the horizontal portion of the first connecting portion; A pair of straight second pairs coupled to the pair of second cylindrical rotary parts vertically downwards; And A pair of soccer balls attached to a lower end of the pair of second connectors so as to be rotatable relative to the pair of second connectors; It consists of The first cylindrical rotating part is mounted in an eccentric state at the front end of the support such that a rotational moment due to gravity acts and can be aligned exactly in the vertical direction; A threaded portion is formed at an upper end of the first connecting portion and an engagement hole of the first cylindrical rotating portion coupled thereto so as to adjust a length of the first connecting portion; The pair of soccer balls has a vertical through hole formed therein so that the pair of soccer balls are rotatable with respect to the second connecting part, and a cylindrical bearing is provided at a lower end of the second connecting part fitted into the through hole. It is attached, the second connection portion is attached to the anti-falling fasteners corresponding to both ends of the cylindrical bearing, a cylindrical plastic for preventing looseness between the cylindrical bearing and the through hole is fitted, And the pair of soccer balls are aligned with and parallel to the horizontal portion of the first connection portion at the same height so as to be in contact with each other. Rectangular support plate; A support of the "a" shape fixedly attached to the support plate; A first cylindrical rotating part mounted to the front end of the support to be rotatable relative to the support; A first connecting portion having a “ㅗ” shape vertically coupled to the first cylindrical rotating part; A pair of second cylindrical rotating portions respectively mounted at both ends of the horizontal portion to be rotatable with respect to the horizontal portion of the first connecting portion; A pair of straight second pairs coupled to the pair of second cylindrical rotary parts vertically downwards; And A pair of tennis balls attached to a lower end of the pair of second connectors so as to be rotatable relative to the pair of second connectors; It consists of The first cylindrical rotating part is mounted in an eccentric state at the front end of the support such that a rotational moment due to gravity acts and can be aligned exactly in the vertical direction; A threaded portion is formed at an upper end of the first connecting portion and an engagement hole of the first cylindrical rotating portion coupled thereto so as to adjust a length of the first connecting portion; The pair of tennis balls is formed with a vertical through hole so that the pair of tennis balls are rotatable with respect to the second connecting portion, and a cylindrical bearing is provided at the lower end of the second connecting portion fitted into the through hole. It is attached, the second connection portion is attached to the anti-falling fasteners corresponding to both ends of the cylindrical bearing, a cylindrical plastic for preventing looseness between the cylindrical bearing and the through hole is fitted, And the pair of tennis balls are aligned with and parallel to the horizontal portion of the first connecting portion at the same height so as to be in contact with each other.

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