JP2012011071A - Golf practice implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make practice possible in which feeling of hitting a ball is materialized in a narrow indoor space of a general household, while a conventional golf practice implement for materializing the feeling of hitting a ball requires use of an actual golf club, which needs a large space such as a part of the garden or a park for the place of practice.SOLUTION: The golf practice implement is designed so that a short dedicated club can be used which can be swung in a narrow indoor space of a general household. The implement is installed with the height from the ground vertically adjustable so as to allow ball hitting with the club. A target ball having an automatic ball resetting mechanism can be continuously hit.

Description

The present invention relates to a golf practice device that can be practiced easily in a narrow space.

Among the conventional golf practice equipment, there is a practice equipment that can obtain a hit feeling when a target ball is actually hit during a swing, and hits a target ball having a height that is teeed up to the ground.
(For example, refer to Patent Document 1.)

Some conventional short practice clubs can provide a hit feeling during a swing.
(For example, refer to Patent Document 2.)

Some conventional rotary exercise devices return to their initial positions after hitting a target ball.
(For example, refer nonpatent literature 3.)

JP-A-10-137378 JP 2008-264493 A Actual Application 2004-416 Actual Application 2004-416 Shoko 52-28622

With the practice device of Patent Document 1, an actual golf club must be used, and a large space such as a garden or a park is required. However, today, golf practice is prohibited in parks and public places for safety. It is difficult to practice unless you have a large garden outside the practice area.

The practice instrument of Patent Document 2 does not actually hit the target ball, and the shot feeling is pseudo and there is a deviation from the actual feeling

In the practice instrument of Patent Document 3, the mechanism is complicated and the manufacturing cost is high.

In Patent Document 4, there is a tennis-specific training device provided with a mechanism for automatically returning the target ball to the initial position.

An object of the present invention is to provide a golf practice instrument that can be practiced easily and safely in a narrow space in view of the above-described problems of the prior art.

Although outdoor exercises are affected by the weather and time for the above issues, we think that it will be much easier if you can practice in the space of a room in a general household. In order to make this possible, it is necessary to use a dedicated club that is shorter than the actual golf club so as not to hit an object in the room when swinging. Further, in order to be able to hit with a short dedicated club, the target ball is attached to the base of the main body installed on the upper part of the arm using the crank mechanism so that the target ball can be installed at a position higher than the ground.

The target ball described above is integrated with the rotating body with a cam. When the target ball is hit with the above-mentioned exclusive club, the rotating body with a cam falls about the shaft rod of the main body base, hits the rubber bump, and instantaneously returns to the original position by the reaction. Based on the above, we have devised an exercise device that can be used to hit a ball in a dedicated club in a narrow space as large as a room in a general household, and that can hit the target ball continuously.

The dedicated club is designed so that the head is made of a soft material so that it can swing safely in the room, and the length is such that it does not hit the ceiling when an adult male swings in a room at home.

As described above, the golf practice apparatus of the present invention can actually hit a target ball with a dedicated club even in a narrow space as large as a room of a general household, and therefore, it is possible to practice swing with a shot feeling. And, by practicing with the golf practice apparatus of the present invention, it is possible to save the trouble of going to the practice field or outdoors and to create an environment where it is easy to work on practice, which is useful for improving the skill of the user.

Since the target ball immediately returns to the initial position after hitting the target ball described above, efficient practice is possible.

The perspective view which shows this invention golf practice instrument FIG. 1 is a view showing a parallel crank mechanism of FIG. Explanatory drawing which shows the state which adjusted the height of the target ball of this invention golf practice instrument Explanatory diagram showing the force applied to the golf practice device of the present invention when hitting Explanatory diagram showing the impact blur detection mechanism Of the automatic ball automatic return mechanism The figure which shows the exclusive club of this invention golf practice equipment Scene when using the golf practice equipment of the present invention

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

As shown in the perspective view of the golf practice apparatus of the present invention in FIG. 1, a crank base lower part 2 constituting a parallel crank mechanism is fixed to one end of the center part of the base 1. The lower crank base 2 has a crank arm 4 and a crank arm 5 of the same length sandwiched in a U-shape with a space therebetween, and is rotatably supported by a shaft bar 16. The two crank arms pass over the center of gravity of the base 1 in a state of being kept parallel, and the crank base top 3 is formed in a U-shape in the vicinity of the symmetrical side centered on the center of gravity. And is rotatably supported by a shaft rod 16.
As shown in FIG. 2, when the two crank arms are in parallel with the base 1, the upper crank base 3 is at the bottom, and the upper crank base 3 is a circular arc centered on the lower crank base 2 when pulled up. It moves on the track, that is, moves up to the lower 2 side of the crank base while climbing up.
This parallel crank mechanism is for adjusting the height of the target ball from the ground while maintaining the level, and is characterized by satisfying its height adjusting function and mechanical rigidity.

As shown in FIG. 1, as a mechanism for fixing the movement of the parallel crank mechanism, a fixing arm 6 is pivotally supported by a connecting rod 7 fixed to a base 1 so as to be rotatable by a shaft rod 16, and is attached to an upper end thereof. The fastening tool 8 that slides in a state where the crank arm lower part 5 is sandwiched is rotatably connected by a fastening bolt 15. By tightening the tightening bolt 15, the tightening tool 8 tightens the lower crank arm 5, the sliding is fixed, and the movement of the crank mechanism is fixed.
With this mechanism, the height adjustment method is a procedure in which the tightening bolt 15 is loosened, the height of the ball is moved to an arbitrary position, and the tightening bolt 15 is tightened, and the height can be adjusted very easily. To do.

There are other methods for adjusting the height, such as a vertical support bar mechanism that can be expanded and contracted, and a method of adjusting the height by adding parts. The parallel crank mechanism is characterized by having a wide height adjustment range from a low position (a in FIG. 3) to a high position (b in FIG. 3). In addition, a force is applied to the parallel crank mechanism at the time of hitting the ball. If roughly divided, as shown in FIG. There is a vertical force 21 applied when hit. By combining the structurally strong parallel crank mechanism and the fixing arm 6 that supports it, both forces can be supported efficiently, making it possible to make each member thinner and thinner, thus reducing weight and space. It is characterized by that.

As shown in FIG. 1, a main body base 9 is installed on the parallel crank base 3. As a joining method, a fixing method and a bearing 19 as shown in FIG. There is a method of being installed so as to be rotatable in the horizontal direction. In the latter case, as shown in FIG. 5 (a), the direction of the hitting force is not the correct direction with respect to the hitting direction 23 of the present training device, but is a deviated direction 24, or the direction of the club face when hitting Since the target ball automatic return mechanism (see FIG. 6) is subjected to a rotational force 25 about the center of the bearing when the angle is oblique, the entire target ball automatic return mechanism is rotated. As a result, the direction of the force applied to the target ball at the time of hitting can be understood and used as a guide for correcting the swing, so that the range of practice methods can be expanded and more effective practice is possible.

As shown in FIG. 6A, a rotating body 13 with a cam integrated with a target ball 14 is erected on the main body base 9 so as to be rotatable by a shaft support of a shaft rod 12. A brake shoe 10 is provided so as to be able to contact the cam portion. Then, a bow bolt 17 is provided under the brake shoe 10 so that the frictional force between the cam portion and the brake shoe can be adjusted. When the bow bolt is tightened, the brake shoe protrudes and retracts when loosened. The butterfly nut 18 is for fixing the rotation of the butterfly bolt 17. In addition to the one in which the rotating body 13 with the cam 13 and the target ball 14 are integrated as described above, there is a method of making the target ball replaceable by fitting a claw or a screw. It is also possible to change the hit feeling by changing the material of the target ball.

Specifically, the movement of the rotating body with a cam will be described. FIG. 6A shows a position before hitting the ball. When the target ball 14 is hit, the rotating body with a cam 13 falls around the shaft 12 and the main body. It hits the abutting rubber 11 provided on the base 9. FIG. 6B shows a state when the rotating body 13 with the cam hits the contact rubber 11, and the reaction direction of the contact reverses the rotation direction of the rotating body 13 with the cam, The cam structure 26 at the center stops at the hitting position due to friction with the brake shoe 10 provided on the main body base 9. The cam portion will be further described. The cam-equipped rotating body 13 rotates about the shaft rod 12, but the arc that forms the cam structure 26 is set to be shifted from the arc 27 centered on the shaft rod 12. As the rotating body with cam 13 returns to the hitting position, the friction between the cam portion and the brake shoe 10 gradually increases, and the rotating body stops at the hitting position.

The abutting rubber 11 has two roles. One is to stop the rotational force of the rotating body 13 with the cam including the hit target ball 14 while absorbing the impact, and the second is to repel it. It has a role to return to the hitting position by force. The material of the rubber 11 is preferably an elastic body such as rubber or a spring that has the properties of satisfying the above two roles.
The hitting force includes a light hitting force such as an approach shot and a strong hitting force such as a tee shot. When the hitting force is light, the impact absorbing power of the rubber 11 may be small. However, if the repulsive force is too weak, the rubber 11 does not return to the hitting position. When the impact force of the rubber 11 is weak, when the impact absorbing force of the rubber 11 is weak, a load is applied to the rotating body 13 with the cam. When the repulsive force is too strong, the force to return to the hitting position is increased and the brake shoe 10 is burdened. For the rubber 11, a material in which both shock absorption and repulsive force are harmonized is selected.

The brake shoe 10 serves to stop the rotating body 13 with the cam at the hitting position by the frictional force, and since it is used repeatedly, durability and wear resistance are required. In addition, it is necessary to select a material that does not damage the contact surface of the rotating body 13 with a cam. Here, nylon is used. In addition to the mechanical brake by friction, the brake function includes an electric brake method and a magnetic brake method.

FIG. 7 (a) is a front view of a dedicated club for hitting the target ball of this practice instrument. The length is set to 40 centimeters to 70 centimeters in order to cope with a wide difference in height, and a grip 28 made of a rubber material is attached to one end of the shaft 29 so that the hand does not slip with the club during the swing. A head 30 is provided at the other end of the shaft 29. The head 30 is assumed to be shaken indoors, and a soft material such as rubber is used to ensure safety so that the impact is reduced even if it hits furniture or a person.

In a normal golf club, a point where a ball is hit, a so-called sweet spot is located at a position shifted by several centimeters from the center of the club shaft, and the center of gravity balance is complicated. In order to reduce the manufacturing cost of this club, the hitting ball portion 31 is set on the extension line of the shaft 29 to simplify the structure. Therefore, the sweet spot of this club is on the extension line of the shaft 29.
Since this practice tool hits the ball in the air, the above is not a problem in practice. FIG. 7B is a side view of a dedicated club for hitting the target ball of the present training instrument.

When practicing indoors, there is a problem of noise when hitting. In this practice device, the target ball 14 is made of a soft material such as plastic, rubber or cloth, and the material of the club to be hit is made of a soft material such as rubber. It does not make a loud sound like when you hit it, and it can be reduced to a level that can withstand indoor use.

It is important to reduce the weight of the training instrument body for indoor use. As described above, the impact of the hit ball is suppressed, so that the material of the rotating body with cam 13 has lightness, toughness and durability. Combined use of polyethylene and EVA resin is possible. Moreover, the cam-made rotating body 13 itself is deformed by this resinization, so that the impact at the time of hitting is absorbed. Further, the weight of the cam-equipped rotating body 13 is reduced, so that the impact hitting the contact rubber 11 is suppressed. From the above, it is possible to use a parallel crank mechanism composed of a simple skeleton for the mechanism for adjusting the hitting point, the weight of the constituent members can be reduced, and the weight of the practice instrument body can be reduced.

FIGS. 8A and 8B are views when using the golf practice apparatus of the present invention, where FIG. 8A is a front view and FIG. 8B is a side view.

DESCRIPTION OF SYMBOLS 1 Base 2 Crank base bottom 3 Crank base top 4 Crank arm top 5 Crank arm bottom 6 Fixing arm 7 Connecting tool 8 Fastening tool 9 Main body base 10 Brake shoe 11 Contact rubber 12 Shaft rod 13 Rotating body with cam 14 Ball 15 Tightening bolt 16 Shaft rod 17 Bow bolt 18 Bow nut 19 Bearing
20 Horizontal force 21 Vertical force 22 Direction of hitting a target ball 23 Correct hitting direction 24 Shot hitting direction 25 Rotating force 26 Cam range 27 Arc centered on a rod

Claims (2)

  It has a mechanism to adjust the height while holding the target ball automatic return mechanism part horizontally on the base, and the target ball automatic return mechanism part installed on it is integrated with the target ball on the base of the main body. A rotating body with a cam is erected so as to be rotatable by a shaft support of a shaft rod, and in order to stop the rotating body with a cam at a hitting position, a brake is applied to the main body base so as to contact the cam portion of the rotating body with a cam. A shoe is provided, and an adjusting screw is provided under the brake shoe so that the frictional force between the cam portion and the brake shoe can be adjusted. A golf practice device comprising an elastic body for returning to a hitting position. In the parallel crank mechanism, two crank arms having the same length under the crank base are sandwiched in a U-shape with a space between them, and each of them is rotatably supported by a shaft rod. The two crank arms are parallel to each other. The crank base top 3 is sandwiched between two crank arms in a U-shape and can be freely rotated by the shaft 16 in the vicinity of the symmetrical side centered on the center of gravity. As a mechanism for fixing the movement of the parallel crank mechanism, which is supported by a shaft, a fixing arm rotatably supported by a shaft rod on a connecting tool fixed to a base, and a crank at the upper end thereof. The golf practice device according to claim 1, wherein the tightening tool that slides with the arm sandwiched between the arms is rotatably connected by a tightening bolt.

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