JPS5819234B2 - sports timer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sports timer suitable for measuring the time of sports whose competition times are predefined.

Conventional sports timers simply display cumulative time; in a sport where the playing time is predetermined, such as basketball, the referee operates the start button to start timing, and the display shows 20 minutes. When the display shows 30 minutes, they know that halftime of the first half has ended, and when the display shows 30 minutes, they know that 10 minutes of the intermission period has passed.
When the display reaches 50 minutes, the players will know that halftime of the second half has ended, and the timing of the competition will end.

In this way, if half time, break time, etc. are cumulatively displayed, in order to know how much time has passed since the start of the competition or the start of the break, you have to calculate it in your head. There are drawbacks.

To avoid this, operate the start/stop button and reset button in the order of stop, reset, and start at the same time as the end of halftime in the first half and the end of the break period, and then start the timing for the break and halftime of the second half. , always start from ``00 minutes OO seconds''.

However, this method has a disadvantage in that the time used for button operations appears as a time measurement error.

The above explanation uses a basket as an example, but
The same goes for sports such as soccer and rugby, and conventional stopwatches and sports timers called chronographs are inconvenient when it comes to timing sports where competition times are predetermined.

The present invention is applicable to sports where the competition time is predefined.
- Eliminate the above-mentioned drawbacks of the conventional system by automatically and accurately displaying break time and break time as the time from the start of the break time, while selecting the various events with different prescribed times as appropriate. The purpose of the present invention is to provide a sports timer that can automatically time the competition time and also easily identify the sport event being timed. The details will be explained below.

An example of a sports timer according to the present invention is shown.

In FIG. 1, reference numeral 1 denotes an exterior case, and a window portion 2 is formed on the front surface of the case.

A display device 3 made of liquid crystal that digitally displays time is provided inside the exterior case 1, facing the window portion 2.

In this embodiment, the display device 3 consists of a 4-day, digit display section, and displays 'minutes' and 'seconds'.

On the side of the exterior case 1, there are operation buttons 4 for a start/stop switch 4a (shown in the second figure) that is operated when starting and stopping timekeeping, and a reset switch 5a (shown in the second figure) that is operated when resetting the timekeeping results. ) operation button 5
is provided, and on the front are pushbuttons 6 for switches 5a and 7a (shown in the second figure) for selecting the sports event to be timed.
．． 7 is provided.

The illustrated embodiment is a sports timer adapted to time a basketball and a soccer game, in which by operating pushbutton 6, the basket can be adjusted by operating pushbutton 7, as will be described in detail later. Soccer is selected respectively, and the playing time is measured.

Next, details of the sports timer shown in FIG. 1 will be explained based on the circuit diagram shown in FIG.

In FIG. 2, reference numeral 9 denotes an oscillation circuit using a crystal resonator 8, which oscillates a signal of, for example, 32.768 Hz, which is supplied to a frequency dividing circuit 11 via an AND circuit 10.

In this embodiment, the frequency dividing circuit 11 is composed of 15 1/2 frequency dividing stages, and outputs an IHz signal.

The output of the frequency divider circuit 11 is a 6-bit sexagesimal second counter 1.
3 and a 6-bit sexagesimal minute counter 14.

The output of the time counter 12 is output in BCD code,
The code is converted by the decoder 15.

Further, the output of the coder 15 is digitally displayed by the display device 3 via the driver 16.

The driving voltage of the display device 3 made of liquid crystal by the driver 16 is controlled by the control circuit 17 .

The control circuit 17 has two power supplies 18.1 with different output voltages.
9 and is turned ON by the output of the switch circuit 23, which will be described later.
Transmission gates 20, 21 controlled to be OFF
and an inverter 22.

In this embodiment, the output voltages of the power supplies 18 and 19 are 1.
2V and 0.9V, O of transmission gate 20
At N time, the display device 3 is driven with 1.2 V and its display color becomes red, and when the transmission gate 21 is ON, the display device is driven with 0.9 V and its display color becomes blue.

The switch circuit 23 includes switches 6a and 7a that are manually operated by a pushbutton 6.1, a resistor 24.25, and two NO.
It is composed of R circuits 26 and 27.

One contact of the switches 5a, 7a is connected to the high potential voltage supply terminal VDD, and the other contact is connected to the resistor 24.
25 to the low potential point and NOR
They are connected to input terminals of circuits 26 and 27, respectively.

The output of the switch circuit 23 is output from the NOR circuit 27, and when the switch 6afJ''-ON is operated, the output logic becomes "0" and continues until the switch 7a is operated to ON, and the switch 7a is operated to ON. If so, the output logic becomes "1" and continues until the switch 6a is turned on.

One contact of the start/stop switch 4a operated by the operation button 4 is connected to a high potential voltage supply terminal VD.
D, and the other contact is grounded to a low potential point via a resistor 28, and is also connected to one input terminal of a two-man OR circuit 29.

The output of the OR circuit 29 is input to the clock terminal CL of a flip-flop circuit (hereinafter abbreviated as FF) 30, and the Q output of the FF 30 is input to the AND circuit 10.

Reference numerals 31, 32, and 33 are detection circuits for detecting that the count content of the time counter 12 has reached a predetermined content;
These are the reference code generation section 31a.

32a, 33a, and a comparison circuit 31b for detecting coincidence between their outputs and the output of the minute counter 14.

32b and 33b.

The reference code generator 31a is a 6-bit code 0010.
10J, the reference code generator 32a generates a 6-bit code rlo1101J, and the reference code 33a is configured to generate a 6-bit code ro10100J. When the output code of the minute counter 14 matches, a logic "1" is output from the comparison circuits 31b, 32b, and 33c.
signal is output.

That is, the detection circuit 31 outputs the count contents of the minute counter 14 when it represents 10 minutes, the detection circuit 32 outputs the count contents of the minute counter 14 when the count contents represent 45 minutes, and the detection circuit 33 outputs the count contents of the minute counter 14. A signal is output when representing 20 minutes.

Reference numeral 34 denotes a program circuit composed of a gate circuit 35 and a 3-bit shift register 36, which controls the detection circuits 31, 32, .
It has a function to program 33 output signals to be used.

The gate circuit 35 controls the Q and Q of the shift register 36.
An OR circuit 37 into which three outputs are input, and a shift register 3
A to which the Q2 output of 6 and the output of the detection circuit 31 are input.
ND circuit 38, the OR circuit 37 and the detection circuit 32
Furthermore, an AND circuit 39 to which each output of the switch circuit 23 inverted by the inverter 41 is input, and the OR circuit 37
and a detection circuit 33, and an AND circuit 40 to which each output of the switch circuit 23 is input, and the AND circuits 38, 39.
40. The output is taken out from the OR circuit 42.

The output of the gate circuit 35 is input to the shift register 36 as a clock signal, and is also input to the reset terminal R of the minute counter 14 via the OR circuit 45.

The borrow output of the shift register 36 is sent to the OR circuit 2.
9, and is also input to the set terminal S of the shift register 36 and the reset terminal R of the frequency divider circuit 11 and the second counter 12 via the OR circuit 44, and is further input to the OR circuit 4.
5 is input.

The shift register 36 changes Ql, Q2, and Q3 to l' by inputting a logic "1" signal to the set terminal S.
-100J.

Reset switch 5a operated by operation button 5
has one contact connected to a high-potential voltage supply terminal VDD, and the other contact to ground via a resistor 43 and to an input terminal of an OR circuit 440.

Next, the use and mode of action of the sports time having such a structure will be explained.

First, taking the case of measuring the playing time of a basketball game as an example, when the push button 6 is operated prior to the start of the playing, the switch 6a turns ON, and the output of the switch circuit 23 becomes logic "1" as described above.

As a result, the display device 3 is driven by the voltage of the power supply 18, and the displayed characters become red.

When the start/reset switch 4a is turned on by operating the button 4, the output of the FF 30 is inverted, the Q output becomes logic "1", and the output of the oscillation circuit 9 is sent to the frequency dividing circuit 11 via the AND circuit 10. input, time counter 1
2 starts.

When 10 minutes pass after the start of time measurement, the detection circuit 31 outputs a logic “
1" signal is output, but Q2 of the shift register 36
Since the output is the logic "O", the output of the gate circuit 35 remains the logic rOJ.

After the timing starts, the second half of the first half, which is half time of the basketball game.
When 0 minutes have elapsed, the detection circuit 33 outputs a logic "1" signal, and the Ql output of the shift register 36 and the output of the switch circuit 23 are logic "1", so the AND
The output of the circuit 40 becomes logic "1", which is the output of the OR circuit 4.
Appears on the output side of 2.

As a result, the shift register 36 performs a shift operation, and Q
2 Output changes to logic “1”.

Further, the minute counter 14 is reset by inputting the output of the gate circuit 35 to the reset terminal R via the OR circuit 45, and the display device 30's digit display is 2
Changes from 0 to 00.

After halftime of the first half, it was time for a break, and the stipulated 1.
0 minutes have passed and the display 30'minute' digit shows 10.
Then, since the output of the detection circuit 31 becomes logic "1" and the Q2 output of the shift register 36 becomes logic "1", a signal of logic "1" is output from the gate circuit 35.

In response to this, the shift register 36 performs a shift operation so that the Q3 output becomes logic "1", the minute counter 14 is reset, and the ``minute'' digit on the display 3 changes to 00.
become.

The second half of the competition starts, and 10 minutes later, the output of the detection circuit 31 becomes logic "1", but it does not appear on the output side of the gate circuit 35, and 20 minutes, which is half time, has elapsed, and the display device 30
When the display of the 'minute' digit reaches 20, the output of the detection circuit 33 becomes logic "1", and since the output of Q3 of the shift register 36 and the switch circuit 23 is logic "1", the logic is output from the gate circuit 35. A signal of "1" is output.

As a result, the shift register 36 performs a shift operation and a borrow signal is output, the F'F30 performs an inversion operation and the Q output becomes logic "0", and the signal from the oscillation circuit 9 is no longer supplied to the frequency dividing circuit 11. At the same time, the frequency dividing circuit 11
, the second counter 13 and the minute counter 14 are reset, and the shift register 36 is further set.

By selecting and specifying a basket by operating the push button 6 as described above, the display device 3 displays the time from the start of each half time and rest period.

When soccer is selected by operating the pushbutton 7, the output of the switch circuit 23 becomes logic "1", the display device 3 is driven by the voltage of the power supply 19 of the control circuit 17, and the characters are displayed in blue. It's different from the time of basketball.

Since the output of the switch circuit 23 is logic "0", after starting time measurement by operating the start/stop switch 4a, there is a 45-minute no-off time in the first half, a 10-minute break, and a half-time in the second half. Every time 45 minutes elapse, the display time on the display device 3 changes to
It automatically resets to minutes and displays the time since the beginning of each half-time and break.

In addition, during timing, please turn on the reset switch 5a.
When operated, the frequency divider circuit 11, second counter 13, and minute counter 14 are all reset, and the shift register 3
6 is set.

Also, if you want to temporarily stop timing, you can
When the stop switch 4a is turned on, FF30's
The output is inverted, the Q output becomes logic "0", and the frequency divider circuit 1
The signal supply from the oscillation circuit 9 to 1 is cut off, and again,
By turning on the start/stop switch 4a, the Q output of the FF 30 becomes logic "1" and the timekeeping operation is restarted.

In this embodiment, the pushbutton 6 for selecting basketball is colored red, the pushbutton 7 for selecting soccer is colored blue, and the color matches the color of the displayed characters on the display device 3 to indicate what sport event is being measured. This allows for easy hand printing.

Although the details of the sports timer according to the present invention have been described above based on the illustrated embodiments, the present invention is not limited to the illustrated embodiments, and various changes and improvements can be made.

For example, the illustrated embodiment is suitable for timing basketball and soccer, but by changing the detection time in the detection circuit, the program circuit, etc., it is possible to obtain a system suitable for other sports. , it is also possible to increase the number of sports events to be timed.

In addition, although the selection of sports events is done using a push button switch, it is also possible to use a rotary switch operated by the crown.

Further, although the drive of the display device 3 is controlled so that the characters displayed on the display device 3 are 8 red when basketball is selected and the characters are blue when soccer is selected, other colors are also possible.

As described above, the sports timer according to the present invention selects the sports event to be timed by operating the switch circuit, thereby allowing the sports timer to time the half-time or half-time of the sport.
The time from the start of the break etc. is automatically measured and displayed, and the time display color can be changed depending on the sport type.
The sports event being timed can be easily determined, the drawbacks of conventional sports timers have been eliminated, and the competition time of sports where the competition time is predetermined can be accurately timed. It achieves its purpose and has remarkable effects.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of a sports timer according to the present invention, and FIG. 2 is a circuit diagram of the sports timer shown in FIG. 3...Display device, 6,7...Push button, 4a...Start/stop switch, 5a
...Reset switch, 6a, 7a...
・Switch, 9...Oscillation circuit, 11...
・Frequency divider circuit, 12...Second counter, 14...
...Minute counter, 15...Decoder, -16
...Driver, 17...Control circuit, 1
8, 19...Power supply, 23...Switch circuit, 31-33...Detection circuit, 31a-33
a...Reference code generation section, 31b to 33b...
... Comparison circuit, 34 ... Program circuit,
35...Gate circuit, 36...Shift register.

Claims (1)

[Scope of Claims] 1. An oscillation circuit, a frequency division circuit that divides the oscillation output signal of the oscillation circuit, a time counter that counts the output signal of the frequency division circuit, and counting contents of the time counter are set in advance. a decoder that converts the counted contents of the time counter into a signal suitable for digital display; and a driver that drives a display device in response to the output of the decoder. , the above-mentioned display device whose display color changes according to a change in the driving electric image, a switch circuit that outputs a signal corresponding to the sport event selected by operating a manually operable switch for selecting a sport event, and the above-mentioned switch circuit. a program circuit that programs the detection outputs to be used in the plurality of detection circuits in cooperation with the output signals of the plurality of detection circuits, and outputs a signal that resets the time counter in response to the output of the detection circuit specified according to the program; and a control circuit that controls a drive voltage of the display device according to an output signal of the switch circuit, and a time display color is different depending on the sport event. 2. The sports timer according to claim 1, wherein the switches of the switch circuit are a plurality of switches operated by push buttons. 3. The sports timer according to claim 1, wherein the detection circuit comprises a reference code generation section and a comparison circuit that detects coincidence between the output of the reference code generation section and the counted output of the time counter. 4. The program circuit includes a shift register whose clock signal is a signal for resetting the time counter, and a gate circuit that selectively passes the output of the detection circuit according to the output of the shift register and the output signal of the switch circuit, and The sports timer according to claim 1, characterized in that the time counter is configured by the output of the gate circuit, and the time counter is composed of a second counter and a minute counter, and the minute counter is reset by the output of the program circuit. A sports timer according to claim 1. 6. Claim 1, wherein the control circuit comprises a plurality of power supplies having different output voltages, and a gate circuit that selectively supplies the output of the power supplies to the driver according to the output signal of the switch circuit. sports timer. 7 The pushbuttons of the switch have different identification colors, while the display device is composed of a liquid crystal, and the liquid crystal displays the time in the same color as the operated pushbutton, Claim 2
Sports timer mentioned in section.