JPH0410858Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a ball game practice machine that can be used as a target for pitching practice, batting practice, etc., and can detect and display the location where the ball hits.

(Prior art) Traditionally, this type of ball game practice machine has a strike zone or other mark (or target) pasted on the repulsion net and the ball is thrown at the target, or a ball game practice machine that is used especially for children, etc. Various types of targets are known, such as those modeled after characters such as monsters, which emit onomatopoeic sounds when a ball or the like hits them.

(Problem that the invention aims to solve) However, in the former case, simply pasting a woven cloth with marks on the repulsion net makes it impossible to detect and display the location where the ball hit. Therefore, especially when throwing a fastball or in a dark place, it is difficult to know where the ball hit, and it is not possible to automatically record the number of pitches and the position where the ball hit.

On the other hand, in the latter case, it is possible to automatically determine whether the ball hit the target or not, but if it does not hit, how far it deviated from the target, and even if it did hit the target, where on the target is it located? It is difficult to accurately detect whether the target has been hit (how much it has missed the center of the target). This latter practice equipment is large and fixedly installed, and a net etc. must be installed at the back of the practice equipment in case the ball misses the target.
It is inconvenient to move and expensive.

Therefore, the purpose of the present invention is to be able to accurately and automatically detect the hit position of a ball, etc., as well as automatically display and record it, and to be lightweight and easy to install and move. To provide an inexpensive ball game practice machine.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a pressure-sensitive conductive rubber sheet that rapidly changes from an insulating state to a conductive state according to applied pressure, and this pressure-sensitive conductive rubber sheet Electrodes for detecting resistance changes of the pressure-sensitive conductive rubber are arranged on both sides of the rubber sheet, and a shock absorbing plate is provided on the surface side of the pressure-sensitive conductive rubber sheet to form a detection section, and the outer periphery of this detection section is The part was attached to the frame via a spring.

(Operation) The means for solving the above problem operates as follows.

The moment a ball, etc. hits the front surface of the pressure-sensitive conductive rubber sheet 1, distortion occurs at that location due to the impact, etc.
The resistance value near that position changes. Therefore, by providing electrodes 2 at various parts of the pressure-sensitive conductive rubber sheet 1 and detecting the portions of the pressure-sensitive conductive rubber sheet where resistance changes have occurred, it is possible to know the location where the ball has hit. can. Since this output is an electrical quantity such as resistance (or current), post-processing such as displaying and recording the position is easy.

Furthermore, the detection part of the present invention is in the form of a sheet, which is attached to the frame via a spring, which itself functions as a net, and because it does not include any mechanical components, it is lightweight and easy to install and move. It is easy and low cost.

(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially sectional side view of a detection section which is the main part of the present invention.

Reference numeral 1 denotes a pressure-sensitive conductive rubber sheet that rapidly changes from an insulating state to a conductive state depending on applied pressure, strain, etc., and electrodes 2 are arranged on the back side 1a at regular intervals on a plane. While attaching the film substrate 3, the back surface 3a of the electrode film 3 is supported by a presser plate 4. On the other hand, a ground electrode plate 5 is pasted on the surface 1b of the pressure-sensitive conductive rubber sheet 1, and a shock absorbing plate 6 is provided on the surface of the ground electrode plate 5.

In this configuration, when a ball hits the surface of the impact-absorbing plate 6, the impact is somewhat buffered by the impact-absorbing plate 6 and reaches the pressure-sensitive conductive rubber sheet 1. As a result, the pressure-sensitive conductive rubber sheet 1 is distorted at that portion, and the resistance value at that portion changes. Therefore, the portion where the resistance value of the pressure-sensitive conductive rubber sheet 1 has changed is changed between the terminal a connected to the ground electrode plate 5 and each terminal b ₁ , b ₂ . . . connected to each electrode. It is possible to detect the position where the ball hits.

FIG. 2 is an overall perspective view showing the general appearance of the ball game training machine according to the present invention.

The detection section explained in FIG. 1 has a horizontal rectangular shape, and its outer periphery is surrounded and held by the inner periphery of the frame 10. Reference numeral 12 denotes a frame for attaching a detection section made of a metal rod, and the detection section is attached to the inside of this frame 12 via a plurality of springs 11 provided on each side of the outer periphery of the frame body 10. At this time, each side of the frame body 10 is attached by being biased by springs 11 in the direction of each opposing side of the frame. And this spring 11... has the ball at the detection part 2.
It serves to further buffer the impact when it hits the impact absorbing plate 6 on the first surface.

By the way, in this embodiment, as means for displaying (outputting) the position where the ball has hit, an LED display and an audio output display are used together.

Reference numeral 13 denotes this display device, which includes a signal processing section that processes output signals from each terminal b ₁ , b ₂ . . . to determine the position where the ball has hit, and an output from this signal processing section. It is provided with an output converter and the like for converting signals into respective signals for display display and audio display, and is provided with a display 14 as a display section and a speaker 15 on the outside.

Note that the reference numeral 16 is a cable that leads output signals from each terminal b ₁ , b ₂ . . . to the display device 13.

FIG. 3 is a block diagram showing the structure of this display device.

Reference numeral 20 indicates the internal configuration of the display device;
The output signal from the detection section 21 is first processed by the signal processing section 2.
2, and the position where the ball hit is determined here. The output from the signal processing section 22 passes through an output converting section 23 or 24 and is output (displayed) by a speaker 15 or a display 14, which are audio output sections, respectively.

That is, the output conversion unit 23 is a conversion unit for audio output, and includes an address decoder 25 and a voice synthesis LSI 2.
6, a bandpass filter 27, an amplifier 28, etc. On the other hand, the output conversion section 24 is a conversion section for display, and is composed of a decoder and the like.

In the above configuration, a sound such as "strike" or "ball" is emitted from the speaker 15 depending on the position where the ball hits, and the score etc. are displayed on the display 14.

(Effects of the invention) As is clear from the above explanation, the invention produces the following effects.

First, it is possible to accurately and automatically detect the position where a ball, etc. hits, and since this detected signal is obtained as an electrical quantity, subsequent processing, display (output), recording, etc. are easy. It can be done in a variety of formats, dramatically improving the effectiveness of your practice.

Second, the detection unit according to the present invention is attached to the frame via a spring, and has the function of itself as a repulsion net, and has no mechanical elements, making it lightweight and easy to install and move. It is easy, has excellent durability, and is low cost.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional side view of the detection unit which is the main part of the present invention, Fig. 2 is an overall perspective view showing the outline of the ball game training machine according to the present invention, and Fig. 3 is the configuration of the display (output) device. FIG. In the drawing, 1 is a pressure-sensitive conductive rubber sheet, 2...
... is an electrode, and 5 is a ground electrode plate.

Claims (1)

[Scope of utility model registration request] A pressure-sensitive conductive rubber sheet that rapidly changes from an insulating state to a conductive state according to applied pressure is provided, and electrodes are placed on both sides of this pressure-sensitive conductive rubber sheet to detect changes in resistance of the pressure-sensitive conductive rubber. A ball game training machine characterized in that a shock absorbing plate is provided on the surface side of the pressure-sensitive conductive rubber sheet to form a detection section, and the outer circumference of the detection section is attached to the frame via a spring.