JP2009172141A - Bat for golf swing practice - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel bat for golf swing practice, which permits a user to simply master a correct, strong and ideal golf swing. <P>SOLUTION: The bat 100 for practicing at swinging a golf club has a head portion 30 through a shaft portion 20 continuously extending from a grip portion 10 in the grip portion 10 which a player holds by both hands. The grip portion 10 is nearly elliptical in the cross-section and has a grip end portion 50 having a diameter larger than that of the grip portion 10 at the end. The head portion 30 is a flat plate, parallel and wide in the large diameter direction of the cross-section of the grip portion 10 and has a weight portion 40 whose weight balance can be varied. When practicing golf swing by using the bat 100 for golf swing practice, a person can easily master a correct, strong, and ideal golf club swing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a golf swing practice bat that is faithful to the basics and that can easily wear an ideal golf swing.

As such conventional golf swing practice devices, for example, those shown in the following Patent Documents 1 to 3 have been proposed. In these golf swing practice devices, a light emitter is disposed in a portion corresponding to an actual golf club head, and the light emitter is caused to emit light by a battery accommodated in the head portion, a shaft or a grip. This is the structure. In order to practice swing form using such a golf swing practice bat, when the practitioner holds the grip and strikes the golf ball on the face of the club head with the light-emitting body turned on. The path that the luminous body moved at this time becomes an afterimage and is visually recognized as a light trajectory, and it is determined whether the swing is accurate from the position or change of the trajectory. ing.
Japanese Utility Model Publication No. 61-100462 Japanese Utility Model Publication No. 61-127770 JP-A-11-9749

By the way, in order to hit an accurate shot stably, it is necessary to wear a swing faithful to the basics. In addition, in shots that require a flight distance such as driver shots, it is necessary to wear a stronger swing in addition to accuracy.
In order to acquire such an accurate and powerful golf swing, it is desirable to go to golf courses and practice areas frequently and practice many golf swings, and further receive guidance from experts such as teaching professionals. .

However, it is often time and economically difficult for many players to actually go to golf courses and practice areas and to receive professional guidance.
For this reason, you will find the appropriate time and place and practice your own practice. However, there are many restrictions on performing swing exercises using a real golf club in a public place such as your home, garden, or park. .

On the other hand, the conventional golf swing practice bat as described above is suitable for self-check of the swing, etc., but it is faithful to the basics and has an accurate and powerful swing such as an ideal golf swing or driver shot. It is difficult to put on.
Accordingly, the present invention has been made to eliminate such inconveniences, and its main object is to provide a new golf swing practice bat that can easily wear an accurate and powerful ideal golf swing. The purpose is to provide.

In general, in order to acquire an accurate and powerful ideal golf swing, it is important to acquire the following three basics.
First, the basic 1 of a golf swing is to have a golf club with a correct grip. In other words, when the golf club is held with both hands and positioned in front of the body (address state), it is ideal that the backs of both hands are parallel to each other with the grip interposed therebetween.

Next, the basic 2 of the golf swing is to improve the swing balance. In order to improve the swing balance, it is necessary to train the slow muscles that contribute to strong movements among the muscles of the whole body (especially legs, hips, and shoulders). It is effective to swing repeatedly.
Next, the basic 3 of the golf swing is to increase the head speed. In order to increase the head speed, it is necessary to train the muscles of the whole body (especially legs, hips, shoulders), especially the fast muscles that contribute to quick movement. It is effective to do.

Therefore, in order to solve the problem, the invention of claim 1
A golf swing practice bat having a grip portion for a player to hold with both hands and a head portion via a shaft portion extending from the grip portion, the grip portion having a cross-sectional shape parallel to the plate thickness direction And has a grip end portion larger in diameter than the grip portion at the end thereof, and the head portion is a flat plate shape that is parallel and wide in the direction of the cross-sectional diameter of the grip portion. And a golf swing practice bat characterized by having a weight portion with a variable weight balance.

  In the golf swing practice bat of the present invention having such a structure, since the cross-sectional shape of the grip portion is almost elliptical, the player grips the grip portion with both hands in a state that is easy to hold. Naturally, the backs of both hands of the basic shape inevitably become parallel to each other across this grip. As a result, the same basic grip state as when an actual golf club is gripped with both hands and positioned in front of the body is naturally acquired, so that the above-described golf swing basic 1 can be achieved.

  Then, when the golf swing practice bat held in such a basic grip state is swung in the same state as when a golf ball is actually hit, the flat head portion is orthogonal to the swing direction. Since it moves in a state, the air resistance of the head portion becomes maximum, and this becomes resistance of the swing operation, and the muscles of the whole body necessary for the swing operation are trained in a balanced manner.

  In addition, the golf swing practice bat of the present invention is provided with a weight portion with a variable weight balance at the head portion thereof. If this weight is increased, the inertial force during the swing operation is increased and the swing arc is increased. It is possible to realize an ideal swing motion in which the body turns sufficiently until the finish of the swing motion. As a result, the slow muscles necessary for improving the swing balance are effectively trained, and the golf swing basic 2 described above can be achieved.

In addition, if the flat head portion is inclined with respect to the swing direction during the swing operation, the resistance changes (decreases), and the swing direction and grip state are deviated from the basic state. A self-check of the swing motion can also be performed.
On the other hand, if the weight of the head part is removed and the weight is reduced, the resistance and inertial force during the swinging operation are reduced, but if the swing is performed quickly, the air resistance of the wide part of the tip part increases, thereby repeatedly in this state. If the swing operation is performed, the fast muscle for increasing the head speed can be effectively trained, so that the above-described golf swing basic 3 can be achieved.

In addition, by providing a weight part with variable weight balance in the head part, even if the entire length is shortened, the resistance and inertial force are the same as when swinging an actual long golf club (for example, a driver). Therefore, you can practice swinging with a feeling close to the actual feeling.
As a result, the space required for the swing can be reduced, so that the golf swing can be practiced fully without being restricted even in a narrow space such as a room.
In addition, since the grip end portion has a grip end portion larger in diameter than the grip portion, it is possible to prevent inconvenience that the grip portion slips out of both hands by mistake during a swing.

Next, the invention of claim 2
2. The golf swing practice bat according to claim 1, wherein the weight portion is one of at least two weight attachment holes perforated along the shaft portion direction of the head portion and the weight attachment hole. A golf swing practice bat comprising a detachable weight member.
According to such a configuration, by changing the weight member to the weight mounting hole far from the variable grip portion, the resistance and inertia during the swing operation can be increased, and conversely, the weight is placed in the weight mounting hole closer to the grip portion. By changing the members, the resistance and inertia during the swing operation can be reduced. As a result, the weight balance during the golf swing operation can be accurately and easily changed.

The invention of claim 3
2. The golf swing practice bat according to claim 1, wherein the weight portion includes a pipe body attached along the shaft portion direction of the head portion, and a movable weight member movable in the longitudinal direction within the pipe body. And a golf swing practice bat comprising a coil spring that biases the movable weight member toward the grip portion.
According to such a configuration, when the swing operation is not performed, the coil spring is always urged by the repulsive force, but when the swing operation is generated and the centrifugal force is generated, the movable weight member is attached to the coil spring. The weight balance of the head portion changes as the pipe moves to the tip side against the force.
Furthermore, since this weight balance is determined by the magnitude of the centrifugal force, that is, the amount of movement of the movable weight member, the resistance and inertia increase as the swing is quickly performed, and the resistance and inertia decrease as the swing is performed slowly. Therefore, the optimal weight balance according to each player's muscular strength and physical strength can be realized.

According to the present invention, a golf club can be held with a correct grip, which is the basic 1 of a golf swing, and can be naturally acquired by repeating swing practice with this grip, and a correct swing path, which is the basic 2 of a golf swing. make. By repeatedly practicing a swing with a heavy swing practice bat with a weight, you can create muscles for swinging and strengthen muscles on the lower body that support the swing. However, muscles that support and move heavy objects are basically different from muscles that move light objects quickly. Therefore, the swing that increases the head speed, which is the basic 3 of the golf swing, removes the weight of the swing practice bat (or attaches the weight for adjustment), repeats the swing that quickly swings in the correct path, and attaches the muscle that can swing quickly. It is a tool that accomplishes the three objectives of this swing with a single practice bat.
This makes it easy to wear an accurate and powerful ideal golf swing. In addition, since the space required for the swing can be reduced, golf swing can be practiced without any restrictions even in a narrow space such as a room.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 3 show an embodiment of a golf swing practice bat 100 according to the present invention. FIG. 1 is a front view of the golf swing practice bat 100, and FIG. FIG. 3A is an enlarged sectional view taken along the line BB in FIG. 1, and FIG. 3B is an enlarged sectional view taken along the line CC in FIG.
As shown in the figure, this golf swing practice bat 100 is integrally provided with a head portion 30 via a shaft portion 20 that extends continuously from the grip portion 10 to a grip portion 10 for a player to hold with both hands. It has a structure.

As shown in FIG. 3A, the grip portion 10 has a substantially elliptical cross-sectional shape with a linearly parallel portion in the thickness direction, and the grip portion 10 has an end portion than the grip portion 10. Also, a grip end portion 50 having a large diameter is provided.
On the other hand, the head portion 30 has a flat plate shape (plate thickness t) that is parallel to and wide in the direction of the cross-sectional diameter of the grip portion 10 (height direction h).
The shaft portion 20 that connects the head portion 30 and the grip portion 10 gradually expands in the direction of the head portion 30 from the grip portion 10 side. From the width H of the head portion 30, the height of the grip portion 10 is increased. It is continuous over the length h.

Further, the head portion 30 is provided with a weight portion 40 so that the weight balance of the head portion 30 at the time of swing can be appropriately adjusted.
That is, the weight portion 40 includes two weight attachment holes 41a and 41b drilled along the direction of the grip portion 10 of the head portion 30, and a weight member 42 made of bolts and nuts. By attaching / detaching the member 42 to / from one or both of the weight attachment holes 41a, 41b, the weight balance of the head portion 30 during swing can be adjusted as appropriate.

Specifically, when the weight member 42 is attached to the weight attachment hole 41b side on the grip portion 10 side, the resistance at the time of swing is reduced and the swing speed is improved. When attached to the weight attachment hole 41a side on the head portion 30 side, the resistance at the time of swing increases and the swing speed tends to decrease.
Here, the material constituting each part of the golf swing practice bat 100 is not particularly limited, and may be composed of, for example, wood, resin, metal, or a composite thereof. Further, the grip part 10, the shaft part 20, and the head part 30 may be formed of separate members, or may be integrally formed from a single piece of wood or metal, such as a baseball bat. good. Further, an anti-slip rubber or the like may be attached to the grip portion 10, or a groove or the like may be processed.

  Further, the size (size) of the golf swing practice bat 100 is not particularly limited, but it is desirable that the total length is short so that the swing practice can be sufficiently performed even in a narrow space such as a room. For example, it is desirable that the total length is about 900 mm, the width H of the head portion 30 is about 200 mm, and the plate thickness t is about 25 mm. Further, when the golf swing practice bat 100 of such a size is produced using a single plate, it is desirable that the minimum cross-sectional diameter of the grip portion 10 is 25 mm, which is the same as the plate thickness t, for convenience of processing. The maximum cross-sectional diameter (height h) is preferably about 30 mm, for example. Further, the corner portion of the grip portion 10 can be processed to have a substantially elliptical cross section by chamfering along the longitudinal direction with, for example, R12.5 mm. Rather than having a perfect cross-sectional oval shape, the grip portion 10 can be easily attached with a thumb or the like if a straight portion of about 5 mm along the longitudinal direction is left at the center in the thickness t direction. Therefore, a grip structure closer to the basic can be naturally realized as will be described later. Further, when the total length is about 900 mm, for example, the length of the head portion 30 and the grip portion 10 is preferably about 200 mm.

In the golf swing practice bat 100 of the present invention having such a structure, when the player grasps the grip portion 10 with both hands, the backs of both hands are as shown in FIG. The grip part 10 is inevitably in a parallel state.
Further, when the grip portion 10 is gripped with both hands and positioned in front of the player's body as in the golf address state, the width direction H of the head portion 30 is parallel to the player's front. When a swing operation such as a golf swing is performed in the state, the head unit 30 moves so as to be orthogonal to the swing direction.

That is, as shown in FIG. 3A, since the grip portion 10 has an almost elliptical cross-sectional shape, if it is gripped in a state that is easy to grip as much as possible, for example, as when holding a bamboo sword, The cross-sectional height direction h is directed to the front direction of the player, and accordingly, the width direction H of the head portion 30 is also parallel to the front direction of the player.
Furthermore, since the back of both hands when gripping the grip part 10 is thereby parallel to the height direction h (cross-sectional diameter large direction) of the grip part 10, the same basics as when the actual golf club is gripped with both hands A natural grip state will be acquired naturally.

As shown in FIG. 5, when the golf swing practice bat 100 gripped in such a basic grip state is swung in the same state as when a golf ball is actually hit, it is shown in FIG. Thus, since the flat head portion 30 moves in a state perpendicular to the swing direction, the air resistance is maximized.
Swing practice can be performed with the same feeling as when swinging using an actual golf club by the resistance during the swinging operation.
If the swing direction or grip state deviates from the basic state, the flat head 30 is inclined with respect to the swing direction during the swing operation, and the air resistance changes (decreases). Therefore, the self-check of the swing motion can be performed by learning this change with the body.

  Further, in the golf swing practice bat 100 of the present invention, since the head portion 30 is provided with the weight portion 40 having a variable weight balance, the head portion 30 is adjusted by adjusting the weight portion 40 as described above. If the weight balance is increased, the resistance and inertial force at the time of swinging will increase. Therefore, among the whole body muscles necessary for golf swing, especially the whole body muscles necessary for improving the swing balance, especially the legs and hips. Can effectively train the slow muscles of the shoulder. In addition, an increase in inertial force increases a swing arc, and an ideal swing motion can be realized in which the body turns sufficiently until the finish of the swing motion.

  On the contrary, if the weight portion 40 is adjusted to reduce the weight of the head portion 30, the resistance and inertia force are reduced and a quick swing motion can be performed. If you repeat the steps, you can effectively train the fast muscles to increase the head speed. In order to minimize the weight of the head portion 30, the weight member 42 of the weight portion 40 may be removed.

Further, by providing the weight portion 40 with such a variable weight balance in the head portion 30, even when the entire length is shortened, it is the same as when an actual long golf club (for example, a driver) is swung. Since the resistance and inertial force can be obtained, swing practice can be performed with a sense close to the actual sense.
As a result, the space required for the swing can be reduced, so that the golf swing can be practiced fully without being restricted even in a narrow space such as a room.

Moreover, since the grip end portion 50 having a diameter larger than that of the grip portion 10 is provided at the end portion of the grip portion 10, it is possible to prevent inconvenience that the grip portion 10 slips out of both hands by mistake during a swing.
Further, the weight member 42 includes a nut 42a that can be inserted into the weight attachment holes 41a and 42b and a bolt 42b that is screwed to the tip of the nut 42a, so that the weight member 42 can be easily replaced with respect to the head portion 30. be able to. In addition, since general-purpose machine parts such as bolts and nuts can be utilized as they are as the weight member 42, the manufacturing cost is also reduced.

It should be noted that at least two of the weight mounting holes 41 a and 42 b may be perforated along the direction of the grip 10, or two or more perforations in the width direction H of the head portion 30 may be perforated. In addition, two or more weight members 42 having different weights may be prepared and used in combination as appropriate, or two or more weight members 42 may be attached and used at the same time.
In the present embodiment, the overall width H of the golf swing practice bat 100 is gradually increased from the grip portion 10 to the head portion 30 as shown in FIG. The shaft portion 20 may be the same size as the grip portion 10 as long as the head portion 30 can be prevented from being bent or broken when a large resistance is applied during the swing operation. For example, as shown in FIG. The shape may change stepwise at the boundary portion.

Moreover, as the weight part 40 with which the head part 30 is equipped, you may use the pipe-shaped thing as shown in FIG.
As shown in FIG. 8, the weight portion 40 includes a pipe body 60 attached along the direction of the shaft portion 20 of the head portion 30, a movable weight member 70 movable in the pipe body 60 in the longitudinal direction, The movable weight member 70 includes a coil spring 80 that urges the movable weight member 70 toward the grip portion 10 side.

If such a weight part 40 is used, as shown in FIG. 5A, the coil spring 80 is always urged toward the grip part 10 by the repulsive force at the normal time, that is, when the swing operation is not performed. When centrifugal force is generated by swinging as shown in FIG. 5B, the movable weight member 70 moves against the urging force of the coil spring 80 toward the tip side in the pipe body 60, and the weight of the head portion 30. The balance changes.
And since this weight balance is determined by the magnitude of the centrifugal force, that is, the amount of movement of the movable weight member 70, the resistance increases as you swing quickly, and conversely, the resistance decreases as you swing slowly. The optimal weight balance according to each player's strength and physical strength can be realized.

In addition, in the weight part 40 shown in FIG. 8, although the fixed weight member 71 was provided in the head part 30 side front-end | tip of the pipe body 60, this may be abbreviate | omitted suitably.
Further, the weight portion 40 shown in FIG. 8 includes a fixed weight member 71 at the tip of the pipe body 60 on the head portion 30 side, and a movable weight member 70 on the opposite side, and a repulsive force (with spring) of the coil spring 80 therebetween The movable weight member 70 is pushed back by the force). On the contrary, the movable weight member 70 side is provided at the tip of the pipe body 60 on the head portion 30 side, and the fixed weight member 71 is provided on the opposite side. It is good also as a structure which pulls back the movable weight member 70 by the contraction force (spring urging | biasing force) of the coil spring 80 in the meantime.

1 is a front view showing an embodiment of a golf swing practice bat 100 according to the present invention. It is the sectional view on the AA line in FIG. (A) is the BB expanded sectional view in FIG. 1, (b) is the CC sectional enlarged view in FIG. It is explanatory drawing which shows an example of the swing direction of the bat 100 for golf swing practice which concerns on this invention. It is explanatory drawing which shows an example of the form at the time of golf swing practice using the bat 100 for golf swing practice which concerns on this invention. It is a front view which shows other embodiment of the bat 100 for golf swing practice which concerns on this invention. It is a front view which shows other embodiment of the bat 100 for golf swing practice which concerns on this invention. FIG. 9 is a cross-sectional view showing another example of a weight portion employed in the golf swing practice bat 100 of FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Golf swing practice bat 10 ... Grip part 20 ... Shaft part 30 ... Head part 40 ... Weight part 41 ... Weight attachment hole 42 ... Weight member 42a ... Nut 42b ... Bolt 50 ... Grid end part 60 ... Pipe body 70 ... Movable Weight member 71 ... Fixed weight member 80 ... Coil spring

Claims (3)

A golf swing practice bat provided with a head portion via a shaft portion extending from the grip portion on a grip portion for a player to hold with both hands,
The grip portion has a substantially elliptical cross-sectional shape, and has a grip end portion having a diameter larger than that of the grip portion at an end thereof,
The golf swing practice bat characterized in that the head portion is formed in a flat plate shape that is parallel and wide in the direction of large cross-sectional diameter of the grip portion, and includes a weight portion with variable weight balance. The golf swing practice bat according to claim 1,
The weight portion includes at least two or more weight attachment holes perforated along the shaft portion direction of the head portion, and a weight member removably attached to any of the weight attachment holes. A golf swing practice bat. The golf swing practice bat according to claim 1,
The weight portion includes a pipe body attached along the shaft portion direction of the head portion, a movable weight member movable in the longitudinal direction within the pipe body, and a coil spring that biases the movable weight member. A golf swing practice bat, comprising:

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