JPS642909B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic timer device.

The present invention provides a timer device that can be incorporated into watches, calculators, and the like.

Although clocks are suitable for providing correct time information for the current time, for example
When there is an appointment after that time, it is not possible to give a quick answer to time information such as how many minutes are left for the specified time.

A timer device can be considered as a method to solve such problems. However, the timer device has the disadvantage that it is necessary to first set the timer time, and it takes time to set the time. Furthermore, when using the same timer time repeatedly, the timer time must be set again.

The present invention solves the above drawbacks, and when switching from another function to the timer function, the frequently used timer time (for example, 60 minutes, 45 minutes, etc.) is automatically set.
minutes, 30 minutes). Furthermore, the present invention provides a timer device that is provided with a memory circuit so that the timer time can be used repeatedly. Furthermore, when the timer time reaches 00 minutes 00 seconds, the display will remain as it is, the count will start counting down again as a repeat timer, and the display will be displayed after a certain period of time, for example 4 seconds.
To provide an extremely user-friendly timer device by emphasizing to the user that the timer time has finished counting and making it easy to understand the operation of starting the next count by setting the actual count value from 00 minutes 00 seconds. The purpose is to

The present invention will be explained below based on examples.

FIG. 1 shows an embodiment of the timer device of the present invention, and is a circuit diagram of the timer device portion of a timer with a clock. Figure 2 shows the timing waveforms of Figure 1. FIG. 3 shows the display contents of the display section of the clock-equipped timer shown in FIG. 1.

In Figure 1, 2 is a frequency divider circuit, which divides the 32Hz signal input through AND gate 1 to 1
Outputs Hz signal. Here, the output s/s of the flip-flop 22 controlled by the start/stop switch A is input to the AND gate 1, and 32
The transmission of the Hz signal is controlled. The 1 Hz signal is differentiated by an AND gate 3 and input to a subtraction circuit 4. 4-bit shift register 5, AND gate 8, AND gate 9, 12-bit shift register 1
1 and the subtraction circuit 4 constitute a closed loop,
The time information is stored in a circular manner, and the subtraction circuit 4 subtracts one second from the time information based on a 1 Hz signal. The AND gates 12, 13, and 14 each operate from the state of the 4-bit shift register 5.
Values of 10 or more, 6 or more, and 7 or more are detected, and AND gates 16 and 17 set the digits of 1 second and 1 minute to 9, and the digits of 10 seconds and 10 minutes to 5, respectively. By the functions of AND gates 12, 13, and 14 and AND gates 16 and 17, carry control is performed during subtraction, such as from 60 minutes to 59 minutes and from 60 seconds to 59 seconds. The timer circuit is configured as described above.

The memory circuit 18 is a circuit for storing timer time, and reads closed loop time information from the 4-bit shift register 5 in response to the write signal D and stores it. In addition, this memory circuit 18
The time information is written into the 12-bit shift register 11 by the sending signal E, and the time information can be transferred to the closed loop. Incidentally, since the time information in the memory circuit 18 becomes blank after being read, the same information is written again from the 4-bit shift register 5 immediately after being read. Flip-flop circuit 23 switches between time mode and timer mode, and is controlled by switch B.
Reference numeral 19 denotes a zero detection circuit, which detects when the remaining time of the timer circuit reaches 00 minutes and 00 seconds. 20 is a timer, which produces an output four seconds after the output of the zero detection circuit 19. In the figure, signals D ₁ , D ₂ , D ₃ , and D ₄ are digit signals representing digits of 10 seconds and 10 minutes, respectively, and t ₁ , t ₂ , t ₃ , and t ₄ are bit signals. is a signal representing the bit within each digit.

Next, the operation of this embodiment will be explained.

Flip-flop FF (hereinafter referred to as FF) 23 is a mode switching FF that switches between the clock function and the timer function so that the display section and external operation members (hereinafter referred to as switches) A and B can be used for both functions. It is. Figure 3a shows the state of the clock function, with 12:34 being displayed. In this state, when switch B is pressed, the output of F.F23 becomes "H", one word signal is generated by AND gate 24, and the AND gate 9 sends a set signal for one word, and AND gate 21 The signal that sets the 10th digit to 6 is sent to OR gate 1.
Send to 0. As a result, when switching from the clock function to the timer function, it is set to 60 minutes 00 seconds. Figure 3b
shows this display content. In this state, switch A starts. The stop switch becomes S/S.

FIG. 3c will be described to explain the present invention.

When switch A is pressed, the output Q of F.F22 becomes “H”
Then AND gate 1 sends 32Hz to frequency divider circuit 2. Furthermore, the write signal D becomes "H" for one word, and the 60 minutes 00 seconds of information stored in the circular loop consisting of the 4-bit shift register 5, the 12-bit shift register 11, the AND gates 8 and 9, and the OR gate 10 is stored. is stored in a memory circuit 18 consisting of a shift register. When the frequency dividing circuit 2 sends out a 1 Hz signal, it is differentiated by the AND gate 3 and sent to the subtraction circuit 4. AND gate 12 makes a decision of 10 or more, AND gate 13 makes a decision of 6 or more, and AND gate 14 makes a decision of 7 or more, and sends a signal to F.F15. AND gate 16 is a gate that sets the 1 second and 1 minute digits to 9, and gate 17 is 10.
This gate sets the seconds and 10 minutes digits to 5. As a result, when a 1 second signal is sent to the subtraction circuit 4 from 60 minutes 00 seconds, 59 minutes 59 seconds is displayed. Similarly, the third
In Figure c, switch A was pressed at 21 minutes and 32 seconds to put it in the stop state, and switch A was pressed again to put it in the start state. This allows repeated start and stop operations.

Next, FIG. 3d, which best represents the features of the present invention, will be explained. In this case, the timer is used continuously for 45 minutes instead of 60 minutes. First, set it to 45 minutes. The embodiment shown in FIG. 1 has a keyboard (not shown) and allows settings to be made using the numeric keys on the keyboard. When the key □4 is set, the clear signal I becomes “L” for one word of the minute digit, and the shift register 5
The information of 4 is sent to the OR gate 10 from the digit signal G with the minute information from . Therefore, the display will be 04 minutes. Next, enter the key □5 to clear the signal I.
becomes "L" for one word of the minute digit, inhibits the minute information from the shift register 5, and the information of 5 is sent to the OR gate 10 from the digit signal G. Further, the shift signal H becomes "H" for one word of the 10th digit, and information 4 from the 4-bit shift register 6 is sent to the AND gate 9. Therefore, the display becomes 45 minutes and the set ends.

In this state, when the start state is set, a down count starts. This 45 minute timer period is stored in the memory circuit 18 in the same manner as in FIG. 3c. When the time reaches 00 minutes and 00 seconds, the 00 detection circuit 19 operates and sends a signal to the 4-second timer circuit. The 4-second timer circuit 20 holds the display contents for 4 seconds, so 00
Minutes 00 seconds are displayed. However, the count is still being performed during this time, so the colon is blinking for 1 second during this time. At 00 minutes and 00 seconds, the next two-word write signal D becomes "H", and the first one-word send signal E becomes "H". As a result, 45 minutes of the contents of the memory circuit 18 are sent to the shift registers 5 and 11, and the 45 minutes of information sent to the shift registers 5 and 11 is written into the memory circuit 18 again in the second word. This allows the timer time to be used continuously without having to reset it. When the information in the shift registers 5 and 11 reaches 44 minutes and 56 seconds, the 4-second counter 20 stops and the display returns to the conventional display method. You can repeat this as many times as you like in a row. If you want to set the seconds digits, you can do so in the same way as the minutes.

Next, FIG. 3e will be explained. In this case, the user wants to use the timer that has been set and used repeatedly at the next opportunity after the timer has been used. If the timer time reaches 00 minutes 00 seconds and the use is once stopped and the timer is set to the start state, the divider circuit 2 is reset and the timer time of the previous use stored in the memory circuit 18 is reset. The information is written in the shift registers 5 and 11 in the same manner, and the information is stored again in the memory circuit 18, which has become blank after transmitting the time information.

A down count is performed in the same manner thereafter.

Although this embodiment does not have a reset switch, if it does have a reset switch, it is desirable to display the timer time when it is reset.

The present invention sets the timer time when the power is turned on, rather than setting it when switching from another function to the timer function, so that the timer function alone has great value.

Furthermore, it is also possible to freely change the set time.

As described above, the present invention leaves the display as it is when the timer time reaches 00 minutes 00 seconds,
The counting content starts counting down again as a repeat timer, and after a certain period of time, for example, 4 seconds, the display changes to the actual count value from 00 minutes 00 seconds, so the repeat timer can be used immediately after counting without setting a blank time. , the user can start counting down again, and the user can reliably recognize that counting has finished. As a result, the timer device of the present invention has the effect of being extremely easy to use without providing any blank time.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a timer device showing an embodiment of the present invention. FIG. 2 is a timing waveform diagram of FIG. 1. FIG. 3 is a diagram showing the display contents of the timer device of FIG. 1.

Claims (1)

[Claims] 1. A frequency dividing circuit that divides the time standard signal, a counting means for which a timer time is set and performs subtraction counting based on the signal from the frequency dividing circuit, a display section that normally displays the counted value of the counting means, and the timer time. a zero detection circuit that detects that the count value of the counting means has become zero, sets the timer time stored in the memory circuit in the counting means, and causes subtraction counting to be performed again; It is characterized by having a timer circuit which inputs the output signal of the zero detection circuit, causes the display section to display a display corresponding to the zero of the count value for a certain period of time, and after a certain period of time has elapsed, causes the count value of the counting means to be displayed. A timer device.