JP2000288145A - Golf swing trainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf swing trainer for leaning accurate impact timing synchronized with the natural frequency of a golf club. SOLUTION: In the trainer mounted on a golf club in practice of swinging, an inertia mass 2 is attached to one end of a spring type elastic body 8 working in the golf swing locus direction, while a vibrating means fixed to a frame body 3 and producing higher amplitude with a natural frequency equal to that of the gold club is provided in the other end. During practice of a swing, the inertia mass 2 produces the sound when it collides against a receiving board 4 fixed to the frame body 3 according to the displacement of the spring type elastic body 8, and the position of the collision sound can be confirmed acoustically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a device for remarkably expressing the "bend" of a golf club shaft.
The present invention relates to a training device for a golfer to acquire the impact timing of a golf swing earlier.

[0002]

2. Description of the Related Art When a golf club is accelerated during a downswing, which is a part of a golf swing, a shaft having a head having a mass is turned in a direction opposite to the swing direction due to the law of inertia (point A in FIG. 1A). In addition, energy is stored in a shaft having a spring property. It is an essential requirement for the golfer to swing back at the time of impact (point a in FIG. 1a) and transmit the stored energy to the golf ball. Synchronized with the natural frequency of the golf club,
In order to perform the correct swing to get the maximum speed at the impact with the head continuing to accelerate at the downswing, the law of conservation of momentum by slowing down the body, arm movement just before the impact of the downswing The momentum of the arm is transferred to the club head, and the head with mass is accelerated. At this time, the bending of the shaft returns, and the shaft is rather warped, so that the impact can be improved. This movement should be performed similarly in the approach shot, although the amount of bending is small due to the low absolute speed. On the other hand, as a method for detecting the amount of bending of the shaft, there is an analysis device in which a strain gauge is fixed to the shaft and a strain gauge is used, but it is expensive and cannot be easily used anywhere. Japanese Patent Application No. 9-294785 is a golf practice device that can easily check the bending of the shaft of a golf club. According to the specification, the inertial mass body (weight) is attached downward, but as a result of the experiment, the horizontal component of the centrifugal force applied to the inertial mass body during the swing is a force acting in the direction opposite to the swing direction, and the collision force Has been found to decrease.

[0003]

SUMMARY OF THE INVENTION Many golfers,
Since the golf club shaft can reach the impact before it can be fully returned, or reverses the bending before the impact, the energy stored in the shaft can not be used effectively and the flight distance of the golf ball decreases. Or, because a normal backspin is not applied to the ball, a shot with a controlled flying direction cannot be expected. This requirement is something that golfers have to master sensuously on their own and is a difficult task to understand especially for beginners. SUMMARY OF THE INVENTION It is an object of the present invention to provide a golf swing trainer designed to enable a golfer to learn the correct timing of an impact tuned to the natural frequency of a golf club.

[0004]

SUMMARY OF THE INVENTION A golf swing practice device according to the present invention is a training device which is mounted on a golf club and swings, and is provided with an inertial mass at one end of a spring-like elastic body acting in the direction of a golf swing orbit. A body is attached, and the other end is fixed to the frame body, having a vibration means having a larger amplitude equal to the natural frequency of the golf club, and during the swinging, the inertia is generated by the displacement of the spring-like elastic body. When the mass body collides with the receiving plate fixed to the frame, a position at which a sound is generated can be confirmed by hearing, the vibration means, the receiving plate, and the attaching / detaching means are fixed to the frame, respectively. I have. Further, the vibration means and the receiving plate are incorporated in a head portion of a shaft having a weight and a swing balance equivalent to that of a normal golf club and having a grip. According to still another feature, the inertial mass and the receiving plate, which serve as a contact point of an electric light emitting device, can be visually confirmed at a position where the inertial mass and the receiving plate come in contact with each other during the swing and emit light electrically. I have.

[0005]

Embodiments of the present invention will be described below. In FIG. 2, an inertial mass body 2 is attached to an upper end of a leaf spring 1 set so as to be soft in a swing direction and hard in a direction perpendicular to the swing, and a lower end is fixed to a frame body 3. It is attached to the receiving plate 4.
When the inertial mass body 2 is set upward, the horizontal component of the centrifugal force when swinging works in the same direction as the swing direction,
It has been found that the collision force is doubled by being added to the bending of the leaf spring 1. Further, an auxiliary leaf spring 5 for preventing buckling of the leaf spring 1 due to centrifugal force is provided. One end of an arc-shaped leaf spring 6 is fixed to the frame 3 so that it can be attached to and detached from the shaft of the golf club, and a lever 7 is provided at the other end. And an attaching / detaching means to which an elastic body 8 for preventing damage to a mounted shaft is fixed. An opening is increased by pulling the lever 7 in the direction of the arrow 9 so that the opening is increased and the exerciser is held between the golf club shaft 10 and can be elastically gripped. FIG.
In FIG. 3A, the training device (frame 3) is mounted on a shaft 10 close to the head of a golf club, or as shown in FIG. Shaft 12 provided with weight 11 in part
To the rear of the swing direction.

The inertia mass body 2 of the vibration means having a natural frequency designed to be equal to that of the golf club is obtained by swinging the golf club or the like on which the training device (frame body 3) is mounted.
Moves in synchronism with the golf club head, and in the downswing direction is opposite to the swing direction (point c in FIG. 1b). By slowing down the movement of the body and arms just before the impact, the bending at the impact position It returns, and it is rather warped (point d in FIG. 1b). At this time,
The inertial mass body 2 collides with the receiving plate 4, and the generated sound is confirmed by hearing. In the case of an abnormal swing, the timing of collision with the receiving plate 4 is delayed or advanced, and a sound is generated at a point other than the impact position.

In FIG. 4, a spring-like elastic body used as a vibrating means utilizes the expansion and contraction of a coil-like spring 13 as shown in FIG. 4A, and utilizes the bending of a rubber-like leaf spring 14 as shown in FIG. It is also possible to use a method using the deflection of the sponge-like spring 15 as shown in FIG.

FIG. 5 shows a golf swing training apparatus having the same weight and swing balance as a normal golf club, in which the leaf spring 1, the inertial mass body 2, and the receiving plate 4 are incorporated in the head portion 16 of the shaft 12. The operation method is as described above.

[0006] The same as above.

FIG. 6 shows an example of a visual confirmation method. The inertial mass 2 and the receiving plate 4 serve as electrical contacts, and when the inertial mass 2 comes into contact with the receiving plate 4 during a swing, an electric circuit is energized. An instantaneous light emitting device 17 using, for example, a strobe xenon discharge tube is provided in the circuit,
The visible light 18 emitted at the moment when the inertial mass body 2 contacts the receiving plate 4 at the impact position can be visually confirmed.

[0010]

According to the present invention, the golfer swings the golf club equipped with the training device, and the inertial mass body which moves in synchronization with the golf club head receives the golf club at the impact point. By being able to confirm the sound or light generated upon contact with the plate, learning of a correct golf swing synchronized with the natural frequency of the golf club can be realized with a simple and inexpensive device.

[Brief description of the drawings]

FIGS. 1A and 1B are a state diagram (b) showing a bending state of a golf club and a state diagram (b) showing a bending state of a vibrating means.

FIG. 2 is a sectional view taken along line AA ′, a sectional view taken along line BB ′, and a sectional view taken along line CC ′ of the product of the present invention.

FIG. 3 is a perspective view (a) of mounting the product of the present invention on a golf club shaft and a mounting view (b) of a golf club equivalent.

4 (a), 4 (b), and 4 (c) are examples of vibration means formed by a spring and an inertial mass body.

FIG. 5 is a structural view of a built-in golf swing practice device.

FIG. 6 is an explanatory diagram of a visual confirmation method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 leaf spring 2 inertial mass 3 frame 4 receiving plate 5 auxiliary leaf spring 6 arc-shaped leaf spring 7 lever 8 elastic body 9 lever moving arrow 10 golf club shaft 11 weight body 12 shaft body 13 coiled spring 14 rubber-like leaf spring 15 Sponge-like spring 16 Head part 17 Light emitting device 18 Visible light 19 Power supply

Claims (3)

[Claims] 1. A training device for swinging a golf club mounted on a golf club, wherein one end of a spring-like elastic body acting in the direction of a golf swing trajectory is attached to an inertial mass body, and the other end is fixed to a frame. A vibration means having a larger amplitude that is equal to the natural frequency of the golf club, and the inertial mass collides with a receiving plate fixed to the frame body due to displacement of the spring-like elastic body during swinging Vibration means, receiver plate,
And a golf swing practice device in which the attachment / detachment means is fixed to the frame. 2. The vibration means and the receiving plate are incorporated in a head portion of a shaft having a grip and a weight equivalent to that of a normal golf club, and having a grip. Golf swing practice device. 3. A position where the inertial mass and the receiving plate, which serve as a contact point of an electric light emitting device, come into contact with each other during the swing and emit light electrically, can be visually confirmed. The golf swing training device according to claim 1 or 2, wherein