JPS63318965A - Switch apparatus of measuring ball - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a ball such as a baseball that can automatically measure the time or speed of the ball leaving the pitcher's hand and entering the catcher's hand. In particular, the present invention provides a switch device for reliably operating a measuring device within a ball.

"Conventional technology" Conventionally, pitching speed was measured by shining infrared rays on a moving object such as a ball at a location far from the pitching position and using the reflected waves. .

[Problems to be solved by the invention] However, according to the above conventional structure, the device becomes complicated and
Moreover, it is troublesome to handle, and since measurement is performed by indirect means using reflected waves of infrared rays, accurate measurements cannot be made.

"Means for Solving the Problems" In order to solve the above problems, the present invention provides an integrated circuit inside the ball.
A measuring device including an electronic arithmetic circuit is installed in the main body, and in order to start the measuring device, a first one responds to the acceleration force when the ball is pitched. This device includes a sensor switch and a second sensor switch that responds to the impact force at the time of a supplementary ball to stop the counting operation of the measuring device.

``Function'' In the above configuration, the electronic arithmetic circuit element, the display device connected thereto, the power supply, the switch element, etc., and other equipment necessary for measurement are installed within the main body of the ball. The counting device is started by the first sensor switch, which is installed through a lWi-resistant material and is set to operate with a small amount of force, and responds to the acceleration force when pitching, and from this, It is set to operate with a large force, and the W at the time of supplementary ball
A second sensor switch activated by the impact force is configured to stop the counting of the measuring device, thereby making it possible to automatically measure the time from pitching the ball to catching the ball. It is.

“Example” The present invention will be explained with reference to an example shown in the figure below.
1 is the main body of the measurement ball, and the ball main body 1 is made of a V1 material such as transparent synthetic resin, and holding parts 21 and 22 of an appropriate volume are integrally formed inside the ball main body 1.
1.22 is above &! An electronic arithmetic circuit element 31 including an integrated circuit necessary for measurement of the electronic arithmetic circuit element, etc., a display device 32 such as a liquid crystal, a battery 33 for power supply, and a fixing member 71!
A first sensor switch 3 is composed of a pole, a wire contact piece, etc., and is set to operate when receiving a relatively weak external force.
4, and a second sensor switch 35 which is also set to be activated when receiving a relatively large external force.

The sensor switches 34 and 35 are, for example, like the embodiment, a weight-shaped wire spring formed at the end of a wire spring that is swingably installed through a fixed contact a and a hole made in the center of the fixed contact a. Consists of contact points.

With the above configuration, when the ball is thrown toward a catcher who is at a predetermined distance, the first sensor switch 34 is actuated by the acceleration force of the ball at the same time as the ball is thrown, and the signal causes the first sensor switch 34 to be activated. The counter of the arithmetic circuit element 31 operates and its contents are displayed on the display device 32.

In this case, the second sensor switch 35 is set so as not to operate at the above acceleration force level.

Next, when this ball lands in the catcher's grip, the impact causes the contact point a of the second sensor switch 35 to come into contact with the contact point a, and the operation of the counter of the electronic arithmetic circuit element 31 is stopped, and the contents at that time are is displayed on the display device 32. The display contents of this display device 32 can be visually observed through the transparent cover unit 2.

"Effects of the Invention" As described above, by providing two sensor switches whose operating forces are set to differ, it is possible to reduce the overspeed force when pitching,
The counter of the electronic arithmetic circuit element can be operated reliably by operating each switch by the impact of the supplementary ball. As a result, by simply performing a pitching motion, the time required for the ball to leave the pitcher's hand and enter the catcher's hand during pitching can be automatically measured together with the operation of the counter of the electronic arithmetic circuit element. If the distance from the pitcher to the catcher is determined in advance, the velocity of the pitch can be detected relatively from the measurement time.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view of a main part of a measuring ball showing an embodiment of the present invention, and FIG. 2 is a perspective view of a main part showing an example of a sensor switch. In the figure, 1 is the ball body, 2 is the transparent cover, 11.12
21 and 22 are dividing bodies, 21 and 22 are holding parts, 31 is an electronic arithmetic circuit element, 32 is a display device, 33 is a battery, 34 is a first sensor switch, and 35 is a second sensor switch.

Claims (1)

[Claims] A measuring device including an electronic calculation circuit is installed in the main body, and a first sensor switch responds to the acceleration force when the ball is pitched to start the measuring device, and stops the counting operation of the measuring device. 1. A measuring ball switch device comprising: a second sensor switch that responds to an impact force at the time of a supplementary ball to cause the ball to be hit.