JPH0481154B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention provides an alarm clock that displays alarm time information without operating the ignition key when an alarm is set. Regarding.

(b) Background of the Invention In recent years, there has been a tendency for digital clocks to be adopted as vehicle clocks in place of conventional pointer clocks. Some of these digital clocks are equipped with an alarm function, and this digital clock with an alarm function is useful when, for example, the passenger takes a nap in the vehicle interior or takes a break for a while in the vehicle interior for a meeting. It is convenient if you set an alarm time for your device, and it will alert you when the set time arrives. Figure 1 shows the Nissan service bulletin introduced in June 1983, introducing Y30 series vehicles (No. 383).
FIG. 2 is a perspective view of a digital clock with an alarm described on pages 384 to 384, and a block diagram thereof is shown in FIG. In both figures, 1 is a selection switch for selecting the content to be displayed on the display section 2. When this switch 1 is turned on, the alarm time display mode is selected, and when it is turned off, the mode is switched to the current time display mode. 3 is a switch for correcting the minutes (indicated by ``MIN'' in Figure 1), 4 is a switch for correcting hours (indicated by ``HOUR'' in Figure 1), and 5 is for resetting the displayed time. reset switch (indicated by “RESET” in Figure 1),
When the alarm time display mode is set by operating the select switch 1, 6 outputs the corrected time signal corrected by operating the correction switches 3, 4 and reset switch 5 to the register 7, and then operates the select switch 1. When the current time display mode is selected, the first switching section switches to output a corrected time signal to the counter 8, and the register 7 converts the signal from the first switching section 6 into an alarm time signal. 9 compares the time signal output from the counter 8 which is counting the signal from the oscillator 10 with the alarm time signal previously output from the register 7, and when the time of the counter 8 and the alarm time match; This is a comparator that drives the buzzer 11. 12 is a second switching unit for changing the display content of the display unit 2 by operating the select switch 1; 13 is a circuit power supply for supplying power to each block; and 14 is for driving the display unit 2. 15 is an ignition switch that is turned on when the ignition key is placed in the accessory position; and 16 is a lighting switch.

In the above alarm clock, first operate the ignition key and turn the ignition switch 15.
or turn on the lighting switch 1
6 is turned on, when the select switch 1 is operated to switch the display on the display section 2 to the hour/minute display mode, the time signal from the counter 8 is input to the display section 2 via the second switching section 12. The current time is displayed on the display section 2.

On the other hand, by operating the select switch 1, the display section 2 is set to the alarm time display mode,
When the alarm time is corrected and a new alarm time is set by operating the correction switches 3 and 4 or the reset switch 5, the Since the alarm time signal is input to the display section 2, the alarm time is displayed on the display section 2.

By the way, with such an alarm clock, if you take a nap in the cabin or take a break for a meeting, you can set an alarm time and the buzzer will sound an alert when the alarm time arrives. However, the ignition key is often removed during naps or breaks, and in order to save current consumption, the time display section of the clock is turned off while the ignition key is removed. Since the time is not displayed, it is not possible to know the remaining time until the alarm time. In such a case, if you operate the ignition key, power will be supplied to the time display section and you will be able to see the alarm time and remaining time again.
It would be convenient to know the alarm time without having to perform such operations.

Furthermore, there is also a device that displays an alarm when the alarm time comes even if the ignition switch is off (Utility Model Application No. 117992/1983).

(c) Purpose of the Invention It is an object of the present invention to provide an alarm clock that displays alarm time information even if the ignition key is removed when the alarm time is set. be.

(d) Structure of the Invention In order to achieve the above object, the present invention provides that when the ignition switch is turned on, power supply voltage is supplied to the time display section, and when the alarm setting means is operated, an alarm is displayed on the time display section. The alarm clock for displaying time information is configured such that when the alarm setting means is operated, power supply voltage is supplied to the time display section to display the alarm time information even when the ignition switch is off. It is something.

(e) Explanation of examples The present invention will be explained below based on the drawings.

FIG. 3 is a block diagram of an embodiment of an alarm timepiece according to the present invention, and the same reference numerals as in FIG. 2 indicate the same components. In this embodiment, a comparator 20 is connected to the output sides of the register 7 and the counter 8, and outputs a signal of "1" when the current time does not match the alarm time. is connected to the base of a power supply driving transistor 21, its collector is connected to the battery 17, and its emitter is connected to the display power supply 14. The rest of the structure is exactly the same as the conventional example shown in FIG.

With this configuration, when the alarm time display mode is set and the current time has not reached the alarm time, the output of the comparator 20 will be "1".
As a result, the power supply driving transistor 21 is turned on, and the power supply voltage of the battery 17 is supplied to the display power supply 14 via the transistor 21.
The alarm time is displayed on the display section 2 even when the ignition key and lighting switch are off. Therefore, it is very convenient to know the alarm time without operating the ignition key or lighting switch while the user is taking a nap or taking a break in the vehicle. Furthermore, when the current time matches the alarm time, the output of the comparator 9 becomes "1", so the buzzer 11 is driven and an alarm is issued, and at the same time the output of the comparator 20 becomes "0" and the transistor 21
Since the display power supply 14 is turned off, the supply of power supply voltage to the display power supply 14 is stopped, so that current consumption can be saved.

FIG. 4 is a perspective view of another embodiment of the alarm timepiece according to the present invention, and FIG. 5 is a block diagram thereof, in which the same reference numerals as in FIG. 3 indicate the same components. In the figure, reference numeral 30 indicates an alarm set switch ("ALARM" in FIG.
31 is a unit timer counter for counting a fixed unit time using the output signal of the oscillator 10, and 32 is a unit timer counter that counts up according to the number of operations of the set switch 30, and the timer counter 31 counts the fixed unit time. An up/down function that counts down by a signal output every time it is counted.
It is a down counter. 33 is a display section consisting of a time display section 33a that displays the current time based on the time signal output from the counter 8, and an alarm time display section 33b that displays the alarm time counted up by the up/down counter 32;
34 is a buzzer drive control section that drives the buzzer 11 based on the outputs of the timer counter 31 and up/down counter 32. In this embodiment, the output terminal Q of the up/down counter 32 is connected to the base of the power supply driving transistor 21.

Next, the operation of the alarm clock will be explained with the ignition switch 15 and lighting switch 16 turned off.

First, when the alarm set switch 30 is operated, the up counter 32 starts counting up and "H" is output from the terminal Q of the counter 32, so the transistor 21 is turned on and the power supply voltage of the battery 17 is changed to the display power supply 14. is supplied to Therefore, the alarm time based on the output from the up/down counter 32 corresponding to the number of operations of the set switch 30 is determined by the alarm time display section 3.
Thereafter, the time count value output by the timer counter 31 is sequentially subtracted from this alarm time, and the subtracted alarm time is displayed on the display section 33b. On the other hand, in the counter 8, the current time measured based on the signal from the oscillator 10 is displayed on the time display section 33a. Therefore, in this embodiment, the time display section 33a and alarm time display section 33b of the display section 33 can be driven without operating the ignition switch 15 or lighting switch 16, so the alarm time display mode is set. The current time and alarm time are displayed even when you are taking a nap in the car.
Further, when the alarm time has elapsed and the output of the up/down counter 32 and the output of the timer counter 31 match, the buzzer drive control unit 34 drives the buzzer 11 to issue an alarm, and at the same time the up/down counter 32 Terminal Q output is “L”
Therefore, since the supply of power supply voltage to the display section 33 is stopped, current consumption can also be saved.

In the above alarm clock, the display section may display only the time or the alarm time.

In this embodiment, a clock with an alarm is described in which power supply voltage is supplied to the time display section by operating an ignition switch or a lighting switch. Of course, it can also be applied to watches.

(F) Effects of the Invention As explained above, according to the present invention, when the alarm setting means is operated, power is supplied to the time display section even if the ignition switch is off. It is very convenient because alarm time information is displayed without having to operate the ignition key during a nap or meeting.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional alarm clock, Figure 2 is a perspective view of a conventional alarm clock.
The figure is a block diagram of the alarm clock shown in FIG. 1, FIG. 3 is a block diagram of one embodiment of the alarm clock according to the present invention, and FIG. 4 is another embodiment of the alarm clock according to the present invention. 5 is a perspective view of the 4th
FIG. 2 is a block diagram of the alarm watch shown in the figure. 1... Select switch, 2, 23... Display section, 14... Power supply for display, 20... Comparator, 21
. . . Power supply driving transistor, 33b . . . Alarm time display section.

Claims (1)

[Claims] 1 a battery, a calculation means for calculating time using power supplied from the battery, an ignition switch connected to the battery, and when the ignition switch is closed, a calculation means for calculating time using power supplied from the battery; A watch having a display means for displaying the time calculated by the calculation means,
an alarm setting means for setting an alarm time; and a power supply means for supplying power from a battery to the display means, regardless of the state of the ignition switch, until the alarm time set by the alarm setting means. A clock with an alarm.