JPS5814625B2 - Stopwatch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronically counting stopwatch device whose operation is controlled by a single operation switch.

For example, in the case of a wristwatch, it is desirable that in addition to the main function of reading the normal time, it also has other functions such as displaying the date and allowing the watch to be used as a stopwatch.

However, when it is desired to provide a wristwatch with a wide variety of functions, a large number of operation buttons and the like are required to control each function and change the display.

For example, when incorporating a stopwatch,
It is necessary to give commands to start and stop timekeeping to the timekeeping unit of the stopwatch, and also to give a command to clear the timekeeping state.
'' is cleared, a start command is given, and the time measurement operation begins. When the measurement is completed, a stop command is given to the time measurement operation, and the measurement time is determined by reading the time value in the stopped state.

From this state, the timer is cleared and a new time measurement state is entered.

If the watch repeats simple start, stop, and clear operations, the stopwatch can be controlled by counting the sequence of button operations, but in an actual stopwatch, it is possible to control the stopwatch by counting the order in which the operation buttons are operated. Measurement operations such as restarting the time measurement operation and integrating the measurement time are also required.

In other words, a selection switching operation is required from a stopped state to two types of states: restart and clear, and the command generation means for this becomes complicated, and if it is incorporated into a wristwatch, for example, the number of operation buttons will be increased unnecessarily. I will have to do it.

This invention improves the above-mentioned drawbacks, enables reliable control of the stopwatch with a single operation switch, simplifies the operability and enables effective use, and makes it possible to use the stopwatch easily even when incorporated into a wristwatch or the like. The object of the present invention is to provide an electronic timekeeping stopwatch device that allows the construction of the timepiece to be sufficiently simplified.

An embodiment of the present invention will be described below with reference to the drawings.

The attached drawing shows an example of a case where it is incorporated into a wristwatch. An oscillator 11 oscillates a reference clock signal, and the oscillation signal from the oscillator 11 is divided by a frequency dividing circuit 12 to generate one pulse per second. It is considered to be a timekeeping clock signal.

This frequency dividing circuit 12 also has the function of a timing generator, and generates clock pulses φA and φB with different timings, and also generates a pulse signal with a cycle sufficiently shorter than one pulse per second.

This short-cycle pulse signal is then frequency-divided by a frequency dividing circuit 13 to generate a signal of one pulse per second (IP/1 s).

In this case, the frequency divider circuit 13 does not generate a frequency divided output when the reset signal is applied, and when the reset signal is cut off, it divides the pulse signal from the frequency divider circuit 12 and starts the frequency dividing operation. It is configured to do so.

The time clock signal of one pulse per second from the frequency dividing circuit 12 is supplied to the decimal counting circuit 14 as a counting signal, and the carry signal from the counting circuit 14 causes the hexadecimal counting circuit 15 to count in steps. Let them do it.

In other words, the counting circuit 14 counts the seconds in one-digit units, and the counting circuit 15 counts the seconds in two-digit units. 1
carry signals are obtained.

Then, from now on, decimal, hexadecimal, and decimal counting circuits 16, 1
7, 18 are counted sequentially, and the counting circuits 16, 17
A clock signal in the unit of "minutes" is obtained from the counter circuit 18, and a clock signal in the unit of "hours" is obtained from the counting circuit 18. ” and “hour” in two-digit numerical display sections 20a, 20b, 20c, respectively.
．． The clock is connected to a digital display device 20 configured to display the time.

Further, the I P / 1 s time clock signal from the frequency dividing circuit 13 is passed through an AND circuit 21 to counting circuits 22 to 26 configured similarly to the counting circuits 14 to 18.
supply to the department.

These counting circuits 22 to 26 constitute a counting circuit for measuring time for a stopwatch, and the counting signals obtained from each counting circuit 22 to 26 are sent to the display switching circuit 1.
Supply to 9.

In this switching circuit 19, the constant counting circuits 14 to 18
The time corresponding to the count value of is displayed on the display device 20, and when the display switching signal is given, the counting circuit 22
-26 time count signals are coupled to the display device 20 to display the stopwatch measurement time.

Control of such a stock watch counting section is performed by a single operation switch 27, and this switch 27
will be set at the time of application.

The signal from the switch 27 is the clock pulse φ
The output signal of the delay circuit 28 and the inverter 30 connected to the output side of the delay circuit 29 are connected in series to the delay circuits 28 and 29, which are day-rate flip-flops that are write and read controlled by A and φB. The output signal is coupled to the AND circuit 31, and when the switch 27 is turned on, the AND circuit 3
1 so that one-shot pulse output can be obtained.

The one-shot pulse output from this AND circuit 31 controls the gate of the AND circuit 33 via the OR circuit 32, and while the gate is open, the AND circuit 33
One clock pulse φA is taken out from.

The clock pulse φ taken out from this AND circuit 33
A is supplied in conjunction with the write command to delay circuits 34 and 35 configured in the same manner as described above.

The delay circuits 34 and 35 are read-out controlled by a clock pulse φ8, and the read output signal from the delay circuit 34 is supplied to the delay circuit 35 via an AND circuit 36 at I~.
The output signal of delay circuit 35 is coupled to OR circuit 37 together with the output signal of delay circuit 34 .

Then, the inverter 3 is connected to the output side of this OR circuit 37.
The output signal from the inverter 38 is coupled to OR circuits 39 and 40, and the output signal from the OR circuit 39 is coupled to the input side of the delay circuit 34.

Further, the output signal from the inverter 38 is given as a reset command to the counting circuits 22 to 26 forming the stopwatch counting section.

Furthermore, the output signal from the delay circuit 35 is coupled to the OR circuits 39 and 40, and the output signal of the OR circuit 40 is coupled to the frequency divider circuit 13 and the IP/I signal from the frequency divider circuit 13.
s signal is counted in binary and 1 pulse per 2 seconds (IP/2s
) is coupled as a reset command to the counter 41 that obtains the output signal.

The operation signal of the operation switch 27 is further combined with the output signal of the delay circuit 34 and the IP/2 signal from the counter 41.
It is supplied to the AND circuit 42 together with the signal s.

The output signal from the AND circuit 42 is coupled to the OR circuit 32, and the output signal of the inverter 43 connected to the output side of the AND circuit 42 is coupled to the AND circuit 36 as a gate signal.

That is, in the device configured as described above, normally the count value signals of the counting circuits 14 to 18 are sent to the display switching circuit 1.
It is coupled to a display device 20 via 9 to display the time.

When the stopwatch section is not used, the output signals of the delay circuits 34 and 35 are "O".
"0" state, and the frequency dividing circuit 13, counting circuits 22 to 26, and counter 41 are set to a reset state by the output signal of the inverter 38.

When the stopwatch is to be operated, a display switching signal is given to the display switching circuit 19 to switch and couple the count signals of the counting circuits 22 to 26 to the display device 20, and the operation switch 2 By inputting 7, a command to start the stop clock timing operation is given.

That is, when the switch 27 is operated, the AND circuit 3
1, a one-shot pulse signal is obtained in response to the operation, the gate of AND circuit 33 is opened via OR circuit 32, one clock pulse φA is taken out, and a write command is given to delay circuits 34 and 35.

, in this case, as described above, the output signals of the delay circuits 34 and 35 are both "0", and the output of the inverter 38 is "1".
”, a signal “1” is written to the delay circuit 34.

Therefore, the gate of the AND circuit 21 is opened by the generation of the clock pulse φ8, and the output signal from the OR circuit 37 rises, so that the re-nit state of the frequency divider circuit 13 and the number circuits 22 to 26 is released, and the counting starts. The circuits 22 to 26 start counting from the state where the count value is "0".

Then, the counting status of the stopwatch is displayed on the display device 20.

When the switch 27 is further operated in such a counting state and the clock pulse φA is taken out from the AND circuit 33, the output signal "1" of the delay circuit 34 causes the AND circuit 36 whose gate is opened by the inverter 43. The signal is shifted to the delay circuit 35 through the signal line 7, and the output states of the delay circuits 34 and 35 are set to "0" and "1".

That is, the gate of the AND circuit 21 is closed, the frequency dividing circuit 13 is reset via the OR circuit 40, the crying operation of the stopwatch counter is stopped, and the operation switch 27 is operated. The measurement time corresponding to the time interval is now displayed on the display device 20.

If the switch 27 is further operated in this state,
The output "1" of the delay circuit 35 is shifted to the delay circuit 34 and set to the counting state again, and the counting circuits 22 to 2
In the 6th part, the cumulative time measurement will continue.

If we consider the case where the switch 27 is operated continuously for at least 2 seconds while the stopwatch is stopped and the output "1" signal is obtained from the delay circuit 35 as described above, it is assumed that the switch 27 is operated continuously for at least 2 seconds. A one-shot pulse output is obtained from the AND circuit 31, and as described above, the signal "1" is shifted to the delay circuit 34, and the clock pulse φB
You will now get a signal "1" output.

That is, a state is set in which the signal from the delay circuit 34 and the signal from the switch 27 are simultaneously coupled to the AND circuit 42, and when this state continues for 2 seconds, the 1/2 s signal from the counter 41 is also coupled to the AND circuit 42. The gate of the AND circuit 36 is closed and a write command is given to the delay circuits 34 and 35.

Therefore, "0" is written to both delay circuits 34 and 35, and delay circuits 34 . The output signals of the inverter 35 both become "0" and the output of the inverter 38 becomes "1".

That is, the frequency dividing circuit 13 and the counting circuits 22 to 26 are all reset, and the stopwatch time measurement section is all cleared to cancel the stopwatch operation and return to the initial state.

That is, the stop counter is controlled to reverse start/stop by operating the switch 27, and is cleared by continuously operating the switch 27 for a specific period of time in the stopped state. This allows for watch control.

It should be noted that various means for generating the control signal to be inverted by the switch 27 are possible in addition to those shown in the embodiment, and can be implemented by constructing a simple binary counting means.

Further, as the means for detecting the continuous operation of the switch 27 for a specific period of time, a timer device including a time constant circuit or the like may be used as appropriate.

Further, an independent timer device may be provided so that the delay circuits 34, 35 are reset whenever the switch 27 is continuously operated for 2 seconds, regardless of the output state.

In addition, in the embodiment, the display switching signal was explained as being controlled separately, but the operation Z control section of the switch 27 controls the counting state of the number of parts. For example, at the time of ``Strosog'' --- Ichito nochi 8-
It goes without saying that the display switching signal may be generated when there is no reset command for the first and second parts.

As described above, according to the present invention, it is possible to obtain an electronic stopwatch device controlled by a single switch, which not only simplifies the configuration and has good operability, but also allows for use in wristwatches, etc. It also becomes possible to effectively incorporate and configure the system.

[Brief explanation of the drawing]

The accompanying drawing is a structural diagram for explaining a stopwatch device according to an embodiment of the present invention. 11... Oscillator, 12, 13... Frequency dividing circuit, 14-18, 22-26... Counting circuit,
19... Display switching circuit, 20... Display device, 27... Operation switch, 28, 29,
34, 35...Delay circuit (tailed flip-flop).

Claims (1)

[Claims] 1. A counting circuit for counting reference clock signals, a display means for displaying the counted value of the counting circuit, a single operating switch for controlling the timekeeping of the counting circuit, and operation of this switch. drive control means that reciprocally sets the counting circuit to a counting state and a counting stop state each time; a detection means that detects a continuous operation of the operation switch for a specific period of time; A stopwatch device comprising clearing means for clearing the counting circuit when a continuous operation for a specific period of time is detected.