JPS6130399B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic flasher with a timer that controls the lighting of a load such as an advertising lamp by turning it on at sunset and turning it off at midnight.

Conventionally, when it is desired to equip an automatic flasher with a timer function, a photoelectric automatic flasher and an electronic timer are combined.In this case, the electronic timer has a display similar to that of an electronic watch. The operating time of the timer was set while checking the display of the current time and operating time on the display unit. Therefore, in such a conventional example, it is necessary to provide an operation time setting section and a display section, which causes the problem of high cost.
There is a problem that it is necessary to use a high-performance IC with various functions such as operation time setting, operation display, alarm, etc., which cannot be implemented using only inexpensive general-purpose ICs.
Another problem was that the operation for setting the operating time (light-off time) was complicated.

The present invention has been provided in view of the above-mentioned points, and aims to reduce costs by eliminating the need to configure a special time display section and time setting section, and making it possible to configure it using only a general-purpose IC.
Moreover, it is an object of the present invention to provide an automatic flasher with a timer that simplifies the setting operation of the light-off time by making it possible to set the subsequent light-off time with only one operation of the light-off switch.

An embodiment of the present invention will be described in detail below with reference to the drawings. Figure 1 shows a block diagram of an embodiment of the present invention. In the figure, 1 is a photodetection circuit, which detects external light and when the amount of ambient light increases, it determines that it is daytime and issues an off output. At the same time, when the amount of ambient light decreases, it is determined that it is nighttime and an ON output is issued. The output of this photodetection circuit 1 is input to an output circuit 6 and a holding circuit 4, and the holding circuit 4 is reset when the output is turned on. When the circuit 1 detects a decrease in the amount of ambient light and produces an on output, the load 5 is turned on. Reference numeral 2 denotes a lights-off switch. By operating this lights-off switch 2, the repetitive pulse counting timer 3 is initial reset, and from then on, this lights-off switch 2 is
The repetitive pulse counting timer 3 returns to 0:00 every 24 hours or 12 hours (determined depending on whether the repetitive pulse counting timer 3 is a 24-hour type or a 12-hour type) from the timing of the operation. At this time, since the setting circuit 7 is set to generate an output pulse when the timer 3 reaches 0:00, the holding circuit 4 is set when the timer 3 reaches 0:0, By causing the holding circuit 4 to generate a holding output, the load 5 is forcibly turned off by the output circuit 6. Reference numeral 8 denotes a reference pulse generating circuit, and the output of this reference pulse generating circuit 8 is counted by a repetitive pulse counting circuit 9 to form a repetitive pulse counting timer 3. Therefore, the reference pulse generating circuit 8 is configured to function as a repetitive pulse counting timer 3. outputs a reference pulse for timekeeping operation by pulse counting. Further, the pulse counting timer 3 is formed of a power supply start type in which power is applied by turning on a light-off switch and starts counting from 0:00.

FIG. 2 shows a more detailed block diagram of an embodiment of the present invention, in which the repetitive pulse counting timer 3 is
A reference pulse generation circuit 8 consisting of an oscillation circuit 13 and a frequency dividing circuit 14, and a 24- or 12-base counter 10 that receives and counts the reference pulse generated once per hour in the reference pulse generation circuit 8. This repetitive pulse counting timer 3 is reset when the light-off switch 2 is turned on and starts counting from 0:00, counting 24 pulses (or
Q ₀ to _{Q 4} when counting 12 reference pulses
All outputs are set to L, and an H signal is generated in a setting circuit 7 constituted by a NOR gate, and this H signal is inputted to a holding circuit 4 as a set signal. The output circuit 6 is composed of a NOR gate 11 and an output control circuit 12, and when the light detection circuit 1 generates an L signal when the amount of ambient light decreases and the holding circuit 4 is reset, its output becomes L. At this time, the NOR gate 11 produces an H output, operates the output control circuit 12, and lights up the load 5.

3A and 3B are time charts for explaining the operation of the circuit according to the embodiment shown in FIG.
In (b), a indicates the output of the setting circuit 7, b indicates the output of the photodetector circuit 1, c indicates the output of the holding circuit 4, and d indicates the blinking state of the load 5. Further, A in the figure shows the case where the lights-off switch 2 is pressed at night, and B in the figure shows the case when the lights-off switch 2 is pressed in the daytime. As shown in A and B in the figure, an H level output signal is generated every 24 hours from timing t ₁ or t ₂ when the light-off switch 2 is turned on, and the timing at which this H signal is generated is When it is "dark", that is, when the on timing _t1 of the light-off switch 2 is at night as shown in Fig. 3A, the setting circuit 7 is
Since the reset input R of the holding circuit 4 is at L level at the timing when the output is generated, this holding circuit 4
is set, and the holding circuit 4 maintains the H level holding state as shown in FIG. 3C until the surroundings become bright and the output of the photodetector circuit 1 becomes H level as shown in FIG. On the other hand, when the turn-on timing _t2 of the light-off switch 2 is in the daytime as shown in FIG. Since the reset input R of the holding circuit 4 is at H level, the holding circuit 4 is not set. Thus, when the lights-off switch 2 is turned on at night as shown in Fig. 3A, the load 5 is turned on when the surroundings become dark as shown in Fig. 3A d, and the timing at which the setting circuit 7 output becomes H level is determined. The lights will turn off, and this will be repeated every day automatically. On the other hand, if you turn on the light off switch during the day as shown in Figure 3 B,
As shown in FIG. 3B, c, the holding circuit 4 does not operate at all, and therefore the load 5 is turned on during the period when the photodetector circuit 1 is producing an L output. In the above explanation, the repetition pulse count timer 3 is set to 24.
We have explained the case of a time type, but if this pulse counting timer 3 is a 12 hour type, the output of the setting circuit 7 will occur once during the daytime even when the lights out switch 2 is turned on at night. When an output is generated, the holding circuit 7 is not affected in any way in its operation as described above, so that the operation is apparently the same as when a 24-hour type is used. In addition, when changing the lights-off time by turning on the lights-off switch 2,
When delaying turning off the light, the light-off switch 2 is turned on while the load 5 is off.
Although the lights-out operation is not performed when the lights-off switch 2 is operated, it goes without saying that the lights-out time is set, and from the next day onwards, the lights-out operation is performed based on the set lights-out time.

Since the present invention is configured as described above, the repetitive pulse counting timer can be used for ordinary logic circuits.
It can be configured using ICs, and there is no need to use highly functional and therefore expensive ICs for watches, etc., making it possible to provide circuits at low cost.Moreover, the lights can be turned off at the same time every day by simply operating the lights-off switch once. This has the effect that the light-off time can be set with a single touch, simplifying the setting operation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a detailed block diagram of the same as above, and FIGS. 3 is a repetitive pulse counting timer, 4 is a holding circuit, and 5 is a load.

Claims (1)

[Claims] 1. A light detection circuit that detects the ambient brightness and emits an output, a 24-hour or 12-hour repeat pulse counting timer that starts the clock from 0:00 by turning on the lights-off switch, and the output of this pulse counting timer. A holding circuit is provided, which outputs and holds an output when the light detecting circuit returns to 0:0, and is reset by the ON output of the light detection circuit at night, and when the ON output of the detection circuit occurs and the An automatic flasher with a timer comprising an output circuit that lights up a load such as a lighting lamp only when the holding output of the holding circuit is not generated.