JPS6122315Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electronic digital clock device, and its purpose is to prevent the sleep circuit from rapidly deactivating even if a time advance operation is performed by mistake while the sleep circuit is operating. The purpose is to prevent the time display from being sent inadvertently.

Conventional electronic digital clock devices are equipped with a sleep circuit that is activated by operating the sleep button and operates for approximately 59 minutes, during which time it outputs a sleep signal.When this sleep circuit is activated, the display first displays the time of 59 minutes. is subtracted as time passes, and when the sleep operation ends after 59 minutes, the normal time display is automatically resumed. This sleep circuit is useful because it can also control other equipment, such as turning on a radio receiver for 59 minutes and then stopping it. Conventional clock devices are configured so that the time can be advanced while the sleep circuit is operating, and if the time delay button is operated,
Display time can be sent at a rate of 2 minutes per second,
If you operate the time forward button, the display time will change by 1 per second.
It can be sent by a percentage of the time. Note that the time advance during the sleep operation is performed in the direction of subtracting the display time.

It is not preferable that the sleep operation time, that is, the sleep display time that is displayed on the display and changes every moment, be erroneously changed during the sleep operation, as this will shorten the sleep operation time. In particular, if you operate the fast forward button during sleep mode, the sleep mode will end instantly, and if a radio receiver is running, for example, the sound will stop instantly, causing discomfort to the user. In addition, a major problem arises in that the normal time display that is restarted after the sleep operation ends is disrupted.

Therefore, the present invention aims to simplify and solve such problems, and one embodiment thereof will be described below with reference to the drawings. In FIG. 1, 1 is a time indicator composed of a display element such as a fluorescent display tube or a light emitting diode, and 2 is a clock circuit that causes the time indicator 1 to emit light and supplies a time signal to display the time. The drive circuit 3 includes an alarm/sleep circuit including a sleep circuit having the above-mentioned function and an alarm circuit having the function described later. The alarm circuit is automatically activated when the time displayed on the display unit 1 reaches the time preset by the user, and outputs an alarm signal (a signal used to generate an alarm sound and control other equipment) for approximately 59 minutes. This outputs the following. The alarm/sleep circuit 3 has a built-in time advance circuit and a time delay circuit.
4 is the alarm signal output terminal, 5 is the sleep signal output terminal, 6 is the sleep circuit start input terminal, 7 is the same time fast forward input terminal, and 8 is a sleep switch for manually starting the sleep circuit. Further, 9 is a control circuit that includes a differential circuit that detects disappearance of the alarm signal at the alarm signal output terminal 4 and outputs a differential pulse, and a shaping circuit that shapes the output of this circuit into a rectangular pulse. This is a selection switch interposed between the input terminal 6 and the input terminal 6. Next, 11 is the transistor TR ₁ and the resistor R ₁ ,
R ₂ and capacitor C ₁ , this is a blocking circuit that prevents the time from being forwarded even if the fast forward switch 12 is operated when the sleep signal is output.
R ₂ and capacitor C ₁ constitute a delay circuit.

The sleep circuit is activated by manually operating the sleep button to operate slip switch 8, and by manually operating the fast-forward button to operate slip switch 1.
When 2 is activated, the time forwarding circuit is activated.

Although the manual operation switch for the time delay circuit is not shown, it can be provided completely separately from the fast-forward system, or by replacing the components of the above-mentioned fast-forward system with slow-forward, it can be made to have the same configuration as the fast-forward system. is also good.

Next, the operation of the above embodiment will be explained. While the alarm circuit is operating, the display 1 shows the normal time and a lamp indicating that the alarm is operating. At this time, when the alarm signal (high level signal) from the alarm output terminal 4 disappears and the potential of the terminal falls to a low level (see Fig. 2A), the control circuit 9 detects this drop in potential, as shown in Fig. 2. A rectangular pulse as shown in A is output. This pulse is applied to the sleep input terminal 6 and the time forward terminal 7 through the selection switch 5 when it is closed. Here, the reason why the above rectangular pulse is delayed by a delay circuit of resistor R ₂ and capacitor C ₁ and applied to terminal 7 is that when the sleep circuit start input and the time forward circuit start input are applied at the same time, the display will be displayed at that time. This is because the normal display time is delayed. The sleep signal is output from the terminal 5 only after two inputs, a sleep start input and a time fast forward start input, are added.
(See Fig. 2 C) Then, a sleep signal is output from the sleep output terminal 5, and this signal is applied to the drive circuit 2 and is passed through the resistor _R1 to the transistor.
Turn on TR ₁ (see Figure 2 d) and ground the time forward start input. This is because if the fast-forward activation input is applied continuously, the sleep time will be sent. After that, the selection switch 5 can be turned on and off according to the length of the alarm operation time.

When this device automatically shifts from alarm operation to sleep operation, there is a slight intermittent time. Therefore, in actual use, relays and the like that control other devices are provided with delay circuits using resistors and capacitors to absorb the intermittent time.

As explained above, according to the device of the present invention, even if you accidentally perform a fast-forward operation during sleep mode, the sleep mode time will not change or the normal display time will not go out of order. be.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of an embodiment of the device of the present invention;
Figures A to E are waveform diagrams for explaining the operation of the device. 1...Time display, 2...Display drive circuit, 3...
...Alarm/sleep circuit, 9...Control circuit, 1
0...Selection switch, 11...Fast forward prevention circuit,
12...Fast forward switch.

Claims (1)

[Scope of utility model registration request] Equipped with a time indicator composed of a display element such as a fluorescent display tube or a light emitting diode, a drive circuit that provides a time signal to the indicator, and a sleep circuit that operates for a certain period of time in response to the operation of a sleep button, An electronic digital timepiece device further comprising a blocking circuit that automatically blocks the operation of at least a time advance circuit among the time advance circuits when the sleep circuit operates.