JPS6134111B2 - - 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.

A clock is suitable for providing correct time information for the current time, but for example, if you have an appointment an hour from now, you may need to provide time information that tells you how many minutes are left for the specified time. It is not possible to give a quick answer.

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.

The present invention will be explained below based on embodiments.

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

FIG. 1 shows a frequency dividing circuit which divides the frequency of a 32 Hz signal inputted through an AND gate 1 and outputs a 1 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 the transmission of the 32 Hz signal is controlled. The 1 Hz signal is differentiated by an AND gate 3 and input to a subtraction circuit 4. The 4-bit shift register 5, the AND gate 8, the AND gate 9, the 12-bit shift register 11, and the subtraction circuit 4 constitute a closed loop, and store time information in a circular manner. , subtracts one second from the time information. AND gates 12, 13, and 14 are 10 or more and 6, respectively, from the state of 4-bit shift register 5.
Detects a value of 7 or more, and AND gate 1
6 and 17 have 1 second and 1 minute digits as 9 and 10, respectively.
Set the seconds and 10 minutes digits to 5. AND gates 12, 13, 14 and AND gates 16,
17 performs carry control when subtracting, such as from 60 minutes to 59 minutes or 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 this 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. The 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, signal 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 representing the bits within each digit.

Next, the operation of this embodiment will be explained.

Flip Flop F・F (hereinafter abbreviated as F・F)
Reference numeral 23 denotes a mode switch F/F for switching between the clock function and the timer function so that the functions of both the display section and external operation members (hereinafter referred to as switches) A and B can be shared. 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", and the AND gate 24 causes 1
A word signal is generated, and AND gate 9 sends a set signal for one word, and AND gate 2
1 sends a signal to the OR gate 10 to set the 10th digit to 6. This will set the time to 60 minutes 00 seconds when switching from the clock function to the timer function. FIG. 3b shows this display content. In this state, switch A becomes a start/stop switch S/S.

FIG. 3C will be explained.

When switch A is pressed, the output Q of F・F22 becomes "H" and AND gate 1 divides 32Hz into frequency dividing circuit 2.
send to Furthermore, the write signal D becomes "H" for one word, and the 4-bit shift register 5, the 12-bit shift register 11, the AND gate 8,
9. Store the information of 60 minutes and 00 seconds stored by the circular loop consisting of the OR gate 10 in the 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 is
The AND gate 13 makes a judgment of 6 or more, the AND gate 14 makes a judgment of 7 or more, and sends a signal to the F/F 15. AND gate 16 is a gate that sets the digits of 1 second and 1 minute to 9, and AND gate 17 is a gate that sets the digits of 10 seconds and 10 minutes 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, Fig. 3c shows the state in which the switch A is pressed at 21 minutes and 32 seconds to put it in the stop state, and the switch A is pressed again to put it in the start state. This allows repeated start and stop operations.

Next, FIG. 3d 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 keyboard's numeric keys. When the key □4 is set, the clear signal I becomes "L" for one word of the minute digit, inhibiting the minute information from the shift register 5, and the information of 4 is sent from the set signal G to the OR gate 10. The display is 04
It will be a minute. Next, when the key □5 is set, the clear signal I becomes "L" for one word of the minute digit, inhibiting the minute information from the shift register 5, and setting the 5 from the set signal G.
information is sent to the OR gate 10. 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. 4 second timer 2
0 holds the display content for 4 seconds, so 00 minutes 00 seconds is displayed. However, the colon is blinking for 1 second because counting is still being performed 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 use this as many times as you like without continuing. If you want to set the seconds digit, you can do so in the same way.

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 provides a timer device which is automatically set to a preset timer time when switching from another function to the timer function, and which can further use the timer time repeatedly.

[Brief explanation of the drawing]

1 is a circuit diagram of a timer device according to an embodiment of the present invention, FIG. 2 is a timing waveform of FIG. 1, and FIG. 3 is a display content of the embodiment of FIG. 1.

Claims (1)

[Claims] 1 A frequency dividing circuit for dividing a time standard signal, a counting means for setting a timer time and performing subtraction counting based on the signal from the frequency dividing circuit, a memory circuit for storing the timer time, and a count value of the counting means. A timer device comprising a zero detection circuit that detects when the timer reaches zero and sets the timer time stored in the memory circuit in the counting means.