JPS642775Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a golf putter practice tool.

The first figure is a perspective view of a conventional indoor putter practice device.
In the figure, 1 is a thin disc-shaped bottom, 2 is a bottom 1
The bottom part 1 and the side wall 2 are both made of a flexible material. Practitioners practice putting by using the space inside the side wall 2 as a hole, but when using this type of equipment there are some differences in terms of conditions compared to when actually competing on a golf course. Because of this, it is difficult for practitioners to develop an accurate sense of distance (perspective). In other words, a ball of appropriate strength that would go into the hole at a golf course is blocked by the side wall 2 and does not enter the side wall 2, or a strong ball that would go over the hole at a golf course stays inside the side wall 2. There is. Furthermore, if the strength of the putter is within a certain range, a ball that passes near the front of side wall 2 (zone A) when viewed from the position of the practitioner in the direction of the arrow will also pass near the vicinity of the periphery of side wall 2 (zone B). Since the passing ball also enters the side wall 2, it is difficult for the practitioner to develop a more accurate sense of direction.

An object of the present invention is to provide a putter practice tool that avoids the above-mentioned problems and allows a practitioner to acquire a more accurate sense of distance and direction.

The details will be explained below based on the drawings.

FIG. 2 is a schematic perspective view of a putter training device to which the present invention is applied, in which 3 is a thin disc-shaped bottom, 4 is a bottom 3
An integral arcuate side wall that surrounds approximately the periphery of and slopes inward. The side wall 4 has a cutout 5 smaller than the diameter of the side wall 4 on the front surface, and has a space large enough to accommodate several golf balls inside. Note that both the bottom portion 3 and the side walls 4 are made of a flexible material, such as rubber.

6 is a pressure sensor arranged on the inner surface of the side wall 4 substantially opposite to the notch 5; a thin base plate 7;
It consists of a letter-shaped vertical plate 8 and a leaf spring 9 with one end fixed to the inner surface of the vertical plate 8 substantially parallel to the back part 8a of the vertical plate 8, and the base plate 7 and the vertical plate 8 are formed of an insulator. The back 8a of the vertical plate 8 and the plate 9 are provided with metal contact plates 10, 11 at opposing positions, and a gap l is normally maintained between the two contact plates 10, 11.

The pressure indicator 12 consists of a base plate 13, a bar 14, and a lamp 15 (for example, a miniature light bulb), and one terminal (not shown) of the lamp 15 is connected to the contact plate 10 on the back part 8a via a conductor 16, and The other terminal of the lamp 15 is connected to a conductor 17 and a switch 18 on the way.
It is connected to the contact plate 11 of the leaf spring 9 via a power source 19 (for example, a dry battery).

Now, the practitioner places the practice tool shown in FIG. 2, for example, on a carpet 20 indoors, closes the switch 18, and plays golf in the direction of the arrow from a position several meters away from the practice tool, aiming at the notch 5 or the bar 14. hit the ball. If the ball is traveling in the wrong direction, it will hit the side wall 4 and stop, or it will come off to the left or right of the practice equipment, but if the ball is traveling in a good direction,
It passes through the notch 5, enters the side wall 4, and hits the leaf spring 9. At this time, if the pressure (impact force) that the leaf spring 9 receives from the golf ball is a certain value, that is, more than the minimum pressure to jump over the hole, the leaf spring 9 is largely bent toward the back 8a of the vertical plate 8, and both contact plates 10, 11 are in contact, and at this moment the lamp 15, the conductors 16, 17,
The circuit consisting of the power source 19 is closed and the lamp 15 is turned on. In this case, the ball is too strong and would be considered to have passed over the hole on a golf course. Furthermore, if the pressure that the leaf spring 9 receives from the ball is less than the above-mentioned certain value, the leaf spring 9 will only be slightly bent toward the back 8a, and the contact plates 10 and 11 will not come into contact with each other, so that the lamp 15 will not turn on. No lights. In this case, the strength of the ball is appropriate and the putter is considered successful. Also side wall 4
If the ball that enters the ball stops in front of the leaf spring 9, it is of course considered that the putter was successful. Note that the gap l between both contact plates 10 and 11 is set to a value commensurate with the conditions of an actual golf course.

As another embodiment of the present invention, it is also possible to use a simple buzzer instead of the lamp 15, and to emit a warning sound only when the pressure that the leaf spring 9 receives from the golf ball exceeds a certain value. Furthermore, as another embodiment, it is also possible to digitally display the pressure applied to the pressure sensor. In this case, the pressure sensor may be, for example, one that combines a diaphragm and an A-D converter, a strain gauge that uses a strain resistance conversion element to extract pressure as an electrical resistance change, or a piezoelectric pressure sensor that uses a crystal. This is suitable, and a household AC power source can be used as the power source. In addition to using a pressure sensor that directly measures the ball's pressure, it is also possible to indirectly determine the ball's pressure from the ball's speed by using a speed sensor (known as a speed sensor) that measures the ball's speed. be. Note that if the pressure sensor becomes too large, another notch can be provided in the side wall 4 opposite the notch 5 to allow a part of the pressure sensor to protrude to the rear.

As explained above, the present invention has a flat bottom portion 3.
This putter practice device is made up of an integral side wall 4 surrounding approximately the peripheral edge of the bottom portion 3, and an entrance notch 5 is provided in a part of the side wall 4, so that the strength and directionality of the putter can be accurately determined. becomes possible. That is, the side wall 4
Even if the ball reaches near the front of the notch 5, even if its momentum is weak, it can smoothly enter the inner space through the notch 5 without being stopped by the side wall as in the conventional case. , it is possible to prevent the ball from passing over the side wall 4 near the notch 5 and entering the inner space, so the ball must pass through the notch 5 in order to enter the side wall 4, making it easier for the practitioner to You can develop an accurate sense of distance and direction. Further, a leaf spring 9 is provided with a surface on which the golf ball that passes through the notch 5 comes into contact in the inner part facing the entrance notch 5 and is biased toward the notch 5 side.
We have installed an alarm (lamp 15, buzzer, etc.) consisting of a switch that is activated by the pressure that causes the leaf spring 9 to jump over the hole, so that even if the ball enters the side wall 4, if the pressure is too strong, a message will be displayed to that effect. can do. Further, since a lamp or a buzzer, for example, can be used as the pressure indicator 12, the training tool can be constructed with a simple structure and at low cost.

In addition, in the conventional example, the side wall 2 is inclined inward in order to make it easier for the ball to enter the side wall 2.
Since the present invention is provided with a notch 5 for the entrance, the side wall 4 does not necessarily have to be inclined inward, but can also be made upright with respect to the bottom 3, for example. It is also possible for the side walls 4 or the bottom 3 to be made of a rigid material. In that case, it is possible to reliably prevent the ball from passing over the side wall 4 and entering the inner space. Further, when a buzzer or a digital display is used as the pressure indicator 12, a bar 14 may be provided for the target of the putter. The bottom part 3 and the side walls 4 do not need to be limited to circular or arcuate shapes; both can be made square and a part of the side wall is provided with a notch, or the bottom part 3 and the side walls 4 can be made square and circular. Furthermore, the putter practice device according to the present invention can be used not only indoors but also outdoors.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional example, and FIG. 2 is a schematic perspective view of a putter training tool to which the present invention is applied. 3... Bottom, 4... Side wall, 5... Notch, 6... Pressure sensor, 7... Base plate, 8... Vertical plate, 9... Leaf spring,
10, 11...Contact plate.

Claims (1)

[Scope of utility model registration request] This putter practice tool consists of a flat plate-shaped bottom 3 and a side wall 4 surrounding the approximate periphery of the bottom. a leaf spring 9 having a surface against which the golf ball that has passed through the notch 5 comes into contact and is biased toward the notch 5;
This golf putter practice tool is equipped with an alarm consisting of a switch activated by the pressure of a leaf spring 9 jumping over a hole.