JPS6113827B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a golf swing training device that allows you to know swing conditions such as open face, closed face, inside out, outside in, etc., and thereby improves your swing technique. .

It is generally known that when a golf club swings erratically, it hooks or slices. In a correct swing, the trajectory will be drawn as shown by the broken line A in Figure 1, and the face surface 2 of the head 1 will be perpendicular to this trajectory A at impact, that is, perpendicular to the fly ball line B. Even if the face surface 2 is in a correct state, it will slice to the outside-in face as shown by the one-dot chain line C, and it will be hooked on an inside-out swing as shown by the two-dot chain line D. Furthermore, as shown in Fig. 2, if you slice a so-called open face where the face surface 2 faces outward with respect to the fly ball line B, and perform an outside-in swing C with such an open face, the degree of slicing will change. will become even worse. Furthermore, as shown in FIG. 3, it is well known that, contrary to the above, a close face will cause a hook, and if an inside-out swing D is performed with such a close face, the degree of the hook will become even worse.

The causes of such slices and hooks are due to various defects such as grip grip, weight shift, and even impact form, but the best way to correct them is to first recognize the trajectory of the swing. Conventionally, in order to recognize this swing trajectory, paper was pasted on the sole surface of the golf club, and the paper was brought into contact with the teeing ground at the time of impact, causing scratches on the paper.Furthermore, a wire of an appropriate length was attached to the club head. On the other hand, it is known that a pressure-sensitive paper is laid down on the take land, and a wire is brought into contact with the pressure-sensitive paper at the time of impact to trace the swing trajectory.

However, in the former case, the take land and the sole surface of the club are brought into contact and the swing trajectory is drawn on paper, so this contact not only reduces the impact force but also reduces the impact of the ball. This is not preferable because it causes the impact form to be disturbed, such as hitting the lower side, resulting in a so-called duffling condition. In the latter case, not only does it lead to a decrease in impact force and duffling, but it is also difficult to make good contact between the wire and the pressure-sensitive paper, making it impossible to follow the swing trajectory, or conversely, causing problems with the club head. This had various problems such as damaging the pressure sensitive paper.

The present invention was developed in view of the above circumstances, and it does not require any contact with a recording member to record the swing locus, and furthermore, it is not necessary to bring any recording member into contact with the ball to record the swing trajectory, and it is possible to avoid deviations in the hitting point position from the center of the face, the so-called sweet spot, and even when the swing trajectory is recorded on an open face or a closed face. To provide a golf swing training device capable of knowing the sole height from the ground surface.

Embodiments of the golf swing training device according to the present invention will be described below with reference to the drawings. In FIG. 4, 3 is the head of the golf club 4. As shown in FIG. 5, a recording paper 7 with a center line 7a corresponding to the so-called sweet spot in the center of the face surface 6 is attached to the sole surface 5 of the head 3 in a replaceable manner. As will be described later, the recording paper 7 has a property that, when it comes into contact with a fluid ejected from a nozzle attached to an ejecting device, the contact area develops or changes color. On the other hand, near practice mat 8 and tee 9,
A through hole 11 is bored in the swing line 10, and a nozzle 14 connected to an injection device 12 with a flexible tube 13 as shown in FIG. 6 is inserted into the through hole 11. Install. This injection device 1
2, as shown in FIG. 7, fluid 16 in a cylinder 15 is spouted upward from a nozzle 4 by opening a solenoid valve 18 with or without a pressure reducer 17. When the foot switch 19 is depressed, the solenoid valve 18 is energized by the power source 20 and opens. In this case, it goes without saying that the fluid may be ejected from the nozzle 14 by simply opening the manual valve. Note that the nozzle 14 can also be installed directly on a tee ground or the like.

FIG. 8 shows another embodiment of the injection device 12, in which a casing 22 is provided with a removable lower lid 21.
It is equipped with a cylinder 15 that can be replaced freely.
The actuator 23 of the cylinder 15 is attached to the mounting member 24
When the lever 26 is rotated by pressing the operation button 25, the lower part of the main body of the cylinder 15 is pressed through the pushing member 27, whereby the fluid in the cylinder 15 is forced through the tube 13 and into the nozzle 1.
It is starting to erupt from 4 onwards. In this case, it is preferable that the ejection and the ejection stop can be sequentially repeated each time the operation button 25 is pressed. As a mechanism for such an operation, for example, as shown in FIGS. 9 to 14, an engaging part 29 having an engaging recess 28 having a triangular cross section is formed protruding from the side surface of the pushing member 27, while the engaging part 29 of the casing 22 is A fitting recess 31 into which the actuator 30 is mounted is formed on the inner surface of the side wall. The actuator 30 has a pair of left and right pins 32, is movably supported in an L-shaped support recess 33 formed on the bottom wall surface of the insertion recess 31, and has a compression spring 34 between it and the side wall of the casing 22. is interposed and the casing 2 is always
2 is biased inward. Further, an engaging recess 28 is provided at the rear end of the actuator 30 on the surface opposite to the engaging recess 28.
An engaging protrusion 35 having substantially the same shape is formed,
Furthermore, an L-shaped lever 36 extends from the rear end of the actuator 30 so as to be able to freely engage with the rear end of the engaging portion 29. On the other hand, the front part of the actuator 30 has a steeply sloped abutting part 3 that can abut with the engaging part 29.
7, a pressing part 38 with a gentle slope connected to the front of this abutting part 37, and an engaging protrusion 39 that is formed protrudingly on the front side of this pressing part 38 and can be engaged with the front end of the engaging part 29. have. When the ejection is stopped, the pushing member 27 is located at the rearmost part within the casing 22, as shown in FIG. 9, and the rear end of the engaging portion 29 and the lever 36 are in an engaged state. When the operating button 25 is pushed in to eject fluid, the pushing member 27 is activated via the lever 26 as shown in FIG.
is pushed forward together with the cylinder 15, and at this time, the front end of the engaging portion 29 compresses the engaging protrusion 35 by the compression spring 3.
4 into the fitting recess 31 and further presses the pushing member 27, the front end of the engaging part 29 and the abutting part 37 abut each other as shown in FIG. If the pressing of the member 27 is stopped, the twelfth
As shown in the figure, the engagement protrusion 35 returns to its original state due to the return bias of the compression spring 34 and engages with the engagement recess 28 . Due to this engagement, the pushing member 27, that is, the cylinder 15, is kept pushed forward, and the actuator 23 is pushed in relative to the cylinder 15, so that the fluid in the cylinder 15 is ejected. . To stop the ejection, the engaging part 29
If the pushing member 27 is pushed further forward against the resistance caused by the collision between the front end of the engaging part 2 and the abutting part 37, the engaging part 2
9 pushes the actuator 30 into the fitting recess 31, and then, as shown in FIG. 13, the front end of the engaging part 29 and the engaging protrusion 39 engage, and the actuating element 30 moves forward. . At this time, since the pin 32 is fitted into the forwardly bent front end 33a of the support recess 33, the actuator 30 is pushed into the insertion recess 31. If the pressing of the pushing member 27 is stopped from this state, the engaging concave portion 28 and the engaging protrusion 35 will not engage with each other due to the return urging force of the spring (not shown) between the actuator 23 and the cylinder 15. The pushing member 27 moves back together with the cylinder 15. When the rear end of the engaging portion 29 and the lever 36 are moved back to the rear limit point or toward the front, the rear end of the engaging portion 29 and the lever 36 are moved as shown in FIG.
The actuator 30 is moved rearward as the pins 32 are disengaged from the front end 33a of the support recess 33, and the actuator 30 is moved inside the casing 22 by the biasing force of the compression spring 34. move,
Therefore, the state as shown in FIG. 9 is established, and preparations are made for the next jetting operation.

The fluid 16 is sent to the nozzle 14 by the injection device 12.
If you swing it while it is spouting, the recording paper 7
As shown in FIG. 15, a swing locus 40 is drawn by the fluid 16. And that swing trajectory 4
0 indicates that the distance S between the front end of the trajectory on the face side and the center line 7a is the deviation of the hitting point from the sweet spot;
Also, an angle α between the trailing end of the trajectory and an imaginary line 41 passing through the front end of the trajectory and parallel to the center line 7a is formed on the toe 42 side of the head 3 with respect to the swing trajectory 40, as shown in FIG. In this case, it indicates a closed face, and its angle α indicates an inside-out swing state. A ball hit in this condition will be hooked. Conversely, the angle α is the net 43
If formed on the side, it indicates an open face. The angle indicates the degree of outside-in, and this allows you to know the swing state at the time of the slice. In addition, since fluid is generally ejected from the nozzle 14 with a certain spread angle,
The width T of the drawn swing trajectory 40 corresponds to the sole height H as shown in FIG. 4, and therefore, the width T indicates the hitting point position in the height direction of the face surface.

Incidentally, water-based colored ink is suitable as the fluid 16, and the swing trajectory 40 is drawn by applying this colored ink to the recording paper 7 on the sole surface. Further, water is used as the fluid 16 and is sprayed from the nozzle 14, while the recording paper 7 contains cobalt chloride, and this recording paper 7 is sprayed from the nozzle 14.
The swing trajectory 40 may be drawn by utilizing the fact that the swing path 40 changes color when it contains water spouted from the swing path 40. Alternatively, while air containing an appropriate amount of ammonia is used as the fluid, wet litmus paper that changes color due to the ammonia may be attached to the sole surface 5 as the recording paper 7, and various other liquids and gases can be used as the fluid. On the other hand, the recording paper 7 may be one that develops or changes color with these liquids or gases.

As described above, according to the golf swing training device according to the present invention, in order to draw a swing trajectory on the recording paper on the sole surface, it is not necessary to bring the recording paper into contact with any other member, so swinging can be done without feeling any resistance. It is possible to do this without causing an unexpected drop in impact force, and from the recorded swing trajectory, it is possible to know the deviation of the hitting point from the sweet spot, swing conditions such as open face, close face, inside out, outside in, etc. In addition, it is possible to know the height between the ground and the sole surface, that is, the so-called top and the degree of duffling, so that the swing form can be easily corrected and the swing technique can be learned and improved.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams showing the swing state of the club head, and FIG. 4 is a front view of essential parts showing an embodiment of the golf swing training device according to the present invention.
5 is a plan view of the recording paper, FIG. 6 is a plan view of the apparatus of the present invention, FIG. 7 is a block diagram showing an example of the ejecting device, and FIG. 8 is a sectional view showing another embodiment of the ejecting device. 9 to 14 are explanatory diagrams showing the operation of the injection device in FIG. 8, and FIG. 15 is a bottom view of the club head showing a state in which a swing trajectory has been drawn. 4...Golf club, 5...Sole surface, 7...
Recording paper, 12...Ejection device, 16...Fluid, 40
...Swing trajectory.

Claims (1)

[Claims] 1 connected to the nozzle via a flexible tube,
A jetting device that jets a fluid for drawing a swing trajectory from the nozzle, and a recording paper that is replaceable against the sole surface of a golf club and that has a property that the contact portion develops or changes color when it comes into contact with the fluid. A golf swing training device comprising: