JPS6237497B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a time switch that is a power supply device that converts AC power into DC power during normal operation, and is driven by a storage battery during power outage.

The controlled device that is switched and operated by the time switch will operate without any problems during normal operation when sufficient power is supplied from the power supply to drive the time switch and the controlled device, but the capacity of the storage battery If there is a power outage for such a long period of time and the time switch stops, the switching state of the time switch at the time of the stop may vary, which may cause problems when the AC power is turned on again.

This invention is designed to stop the clock mechanism after switching to a specific controlled device when there is a long power outage that causes the clock mechanism to stop, and to prevent any inconvenience from occurring when restarting the clock mechanism. purpose.

To explain this invention based on the figures, the first
2, 1 is a clock mechanism, and as shown in FIG. 3, a power failure detection switch 25, which will be described later,
It is connected to the storage battery 22 and the power supply device 21 via the power supply, and is driven by the power supply mentioned above. 2 is a scale plate fixed to a clock shaft 3 that rotates once every 24 hours; 4 is a fixed pointer; 5, 6, 7 are first to third changeover switches set at predetermined positions of the clock mechanism 1; 8;
Reference numerals 9 and 10 are actuating levers that move up and down with each end supported by a column 25, and each free end of which is connected to the push button 1 of the first to third changeover switches 5, 6, and 7.
1, 12, and 13 are operated. Reference numerals 14, 15, and 16 have their inner ends rotatably fitted to the clock shaft 3, and U-shaped fixing parts 14A, 15A, and 16A formed at their outer ends clamp the outer periphery of the scale plate 2. In the figure, these operators 14, 15, and 16 indicate 9 o'clock, 12 o'clock, and 15 o'clock, respectively, on the scale plate 2, as an example. 1
7, 18, 19 are the respective operators 14, 15, 1
Penetrating through the fixed parts 14A, 15A, 16A of 6,
The above-mentioned operators 14, 15,
16 to the scale plate 2, and the switching pin 17 is attached to the above-mentioned operating levers 8, 9, 10.
The lengths of the switching pin 18 and the switching pin 19 are selected so that they can be engaged with the operating levers 9 and 10, and the switching pin 19 can be engaged with the operating lever 10, respectively.

In Figures 3 to 7, 20A, 20B
is an AC power source. Reference numeral 21 denotes a power supply device that converts the AC power supply 20A into DC power. Reference numeral 22 is a storage battery, which is charged by the power supply device 21 and serves as a power source for a circuit to be described later in the event of a power outage.
23 is a voltage detection circuit, and 24 is a voltage detection relay. The voltage detection circuit 23 is connected to the storage battery 22 described above, and operates when the output voltage of the storage battery 22 falls below a specified value, and the voltage detection relay 24 is activated. The detection coil 24B is excited. 24A is the set coil of the detection relay 24, 25 and 26 are the detection relay 2
The above-mentioned detection relay 24 is made of a self-holding type relay, and when the detection coil 24B is energized, the switching contacts 25c and 26c of the detection switches 25 and 26 switch to contact 2.
When the set coil 24A is excited at 5B and 26B, the circuit is closed to the contacts 25A and 26A. 25C,
26C is a switching contact of the above-mentioned detection switches 25 and 26, and 25C is the above-mentioned set coil 24A,
It is connected to the storage battery 22 together with one end of the detection coil 24B. The switching contact 26C is connected to an AC power source 20B. 27 is a set switch, one end of which is connected to the above-mentioned set coil 24A, and the other end connected to the negative electrode of the storage battery 22. One terminal side of the clock mechanism 1 described above is the detection switch 25 described above.
It is connected to contact 25A. Reference numeral 29 denotes a first self-holding relay, which has a switching contact 29a connected to the contact 26A of the detection switch 26 mentioned above and a contact 2.
9B, 29C, a set coil 29D, and a reset coil 29E. Reference numeral 30 denotes a second self-holding relay, which has a switching contact 30A connected to the contact 29B of the first self-holding relay 29 and a contact 30.
B, 30C, a set coil 30D, and a reset coil 30E, and the contact 30B has a third
A second controlled device 32 is connected to the contact point 30C, and the above-mentioned detection switch 26
is connected to the first controlled device 33 together with the contact 26B of the first self-holding relay 29 and the contact 29C of the first self-holding relay 29. The other end of each controlled device 31, 32, 33 is connected to the other end of the AC power source 20B.
Reference numerals 34 and 35 are backflow prevention diodes, the cathodes of which are used to connect to the set coil 29D of the first self-holding relay 29, and the anode of the diode 34 to the set coil 29D of the second self-holding relay 30. Together with the reset coil 30E, the anode of the diode 35 is connected to the normally open contact 6C of the second changeover switch 6, and the anode of the diode 35 is connected to the normally open contact 7C of the changeover switch 7, together with the set coil 30D of the second self-holding relay 30. It is connected. The switching contact 5A of the first switching switch 5 is connected to the contact 25A of the detection switch 25, and the normally closed contact 5B is connected to the switching contact 6A of the second switching switch 6. Normally closed contact 6B
is connected to the switching contact 7A of the third switching switch 7. Further, the normally open contact 5C of the first changeover switch 5 is connected to the reset coil 29E of the first self-holding relay 29, and the coils 29D, 29E, 30D, 3 of the respective self-holding relays 29, 30
The other end of 0E is collectively connected to the negative electrode of the storage battery 22 described above.

Next, the operation of the time switch according to the present invention will be explained.

As shown in FIGS. 3 to 6, the power from the AC power source 20A is converted to DC by the power supply device 21, and the storage battery 22 is charged. Power supply device 2
1 and the storage battery 22 are applied to a voltage detection circuit 23. Here, when the set switch 27 is closed, the set coil 24A of the detection relay 24 is closed.
DC current is applied to the detection switches 25 and 26.
becomes the state shown in Figure 3. The clock mechanism 1 is driven by DC power applied through the contact 25A of the detection switch 25. By driving the clock mechanism 1, the first
The self-loading plate 2 shown in FIGS. 2 and 2 rotates in the direction of the arrow,
When the fixed pointer 4 reaches 9 o'clock, the switching pin 17 presses the free ends of the operating levers 8, 9, 10, and the first,
Push button 1 of the second and third changeover switches 5, 6, and 7
Push in 1, 12, 13, switch contacts 5A, 6A,
7A is switched as shown by the broken line in FIG. By switching the first changeover switch 5, the reset coil 29E of the first self-holding relay 29 is excited, and its switching contact 29A is also switched as shown by the broken line, and the switching contact 29 of the detection switch 26 is switched from the AC power supply 20B to the switching contact 29A of the detection switch 26.
The first controlled device 33 is energized through the contact 26A, the switching contact 29A of the first self-holding relay 29, and the contact 29C. Furthermore, the scale plate 2 rotates,
When the switching pin 17 and the operating levers 8, 9, 10 are disengaged, the switching switches 5, 6, 7 return to the state shown by the solid line in FIG. 3, and the reset coil 29E of the first self-holding relay 29 is energized. is cut off, but the switching status remains unchanged because the other coils are not energized either.
Power supply to the third controlled device 33 continues.

Next, the scale plate 2 rotates, and at 12 o'clock, the switching pin 18 presses the free ends of the operating levers 9, 10 to switch the common contacts 6A, 7A of the switching switches 6, 7 as shown by the solid line in FIG. In this case, since the operating lever 8 of the first changeover switch 5 and the changeover pin 18 are not engaged, the first changeover switch 5 is not switched. By switching the second and third changeover switches 6 and 7, the DC power is supplied to the changeover contacts 25C and 25A of the detection switch 25, the changeover contact 5A of the first changeover switch 5, the normally closed contact 5B, and the second The reset coil 3 of the second self-holding relay 30 is connected via the changeover contact 6A of the changeover switch 6 and the normally open contact 6C.
0E is applied, and the switching contact 30A is switched to the solid line in FIG. Further, power is applied from the normally open contact 6C of the second changeover switch 6 to the set coil 29D of the first self-holding relay 29 through the diode 34, and this changeover contact 29A is also switched to the solid line state. By the above switching operation, the AC power supply 20B is transmitted to the detection switch 26 switching 26C, the contact 26A, the switching contact 29A of the first self-holding relay 29, the switching contact 29B, and the switching contact 3 of the second self-holding relay 30.
0A, the second controlled device 3 via the contact 30C.
2 is energized. Furthermore, when the scale plate 2 rotates and the switching pin 18 is disengaged from the operating levers 9, 10, the second and third switching switches 6, 7 return to the state shown by the broken line in FIG. 4, but the first, Second self-holding relay 2
The switching states of 9 and 30 remain unchanged. Furthermore, scale plate 2
rotates, and at 15 o'clock the switching pin 19 presses the free end of the operating lever 10, switching the switching contact 7A of the switching switch 7 as shown by the solid line in FIG. As a result of the above switching, from the power supply device 21, the switching contact 25C, the contact 25A of the detection switch 25, the switching contact 5A of the first switching switch 5, the normally closed contact 5B, the switching contact 6A of the second switching switch 6, the normally closed contact 6
B. The set coil 29D of the first self-holding relay 29 is energized via the switching contact 7A of the third switching switch 7, the normally open contact 7C, and the diode 35, and the normally open contact 7C of the third switching switch 7 is energized. , the set coil 3 of the second self-holding relay 30
0D is excited and its switching contact 30A is switched as shown by the solid line in FIG. Through the above switching operation, the AC power supply 20B, the switching contact 26C of the detection switch 26,
Contact 26A, switching contact 29A of first self-holding relay 29, contact 29B, second self-holding relay 3
0 switching contact 30A and contact 30B, the third
Power is applied to the controlled device 31 of.

By repeating the above operation, the AC power supply 20 is sequentially connected to the first controlled device 33 at 9 o'clock, the second controlled device 32 at 12 o'clock, and the third controlled device 31 at 15 o'clock.
B is applied.

Next, the operation during a power outage will be explained with reference to FIG. When a power outage occurs, power is not applied from the AC power supplies 20A and 20B, and power is not applied to each controlled device 31, 32, and 33. However, the detection switch 25,
26 changeover switches 25C and 26C are in the state shown by broken lines, and DC power is applied to the clock mechanism 1 etc. via the storage battery 22, changeover contact 25C, and contact 25A, and each part switches normally. However, if the power outage continues for a long time, the output voltage of the storage battery 22 decreases, the voltage detection circuit 23 is activated, and the detection coil 24B of the detection relay 24 is excited. Detection switches 25 and 26 are activated by excitation of detection coil 24B.
is switched as shown by the solid line in Fig. 6, and clock mechanism 1
Then, the power is cut off to the changeover switches 5, 6, 7 and the self-holding relays 29, 30, and the timepiece device stops. Further, by switching the detection switch 26, the circuits to each controlled device 32, 31 are disconnected.

Note that during a power outage, the clock mechanism 1 continues to drive until the voltage detection circuit is activated, and each self-holding relay 2
9 and 30 are also performing switching operations.

Next, the operation will be described when the voltage detection circuit 23 is activated, the detection switches 25 and 26 are switched to the solid line in FIG. 6, the circuit is disconnected, and then the power outage is restored.

When AC power supplies 20A and 20B are restored in the state shown in FIG. 6, detection contacts 25 and 26 are in the switched state as shown by the solid line, and AC power supply 20B is in
6C, the first controlled device 3 via the contact 26B
3 is energized. This state is for each self-holding relay 2.
Regardless of the switching state of the switches 9 and 30, the first controlled device 33 is energized in the same way.

Further, in this state, the detection switch 25 is disconnected, and the subsequent circuits are in a non-energized state.

Next, if the set switch 27 is turned on once and then disconnected, the set coil 24A of the detection relay 24 is turned on.
is excited, the detection switches 25 and 26 return to the state shown by the broken lines in FIG. 6, DC power is applied to the clock mechanism 1, and the scale plate 2 starts rotating. At the same time, one of the controlled devices 31, 32, and 33 is connected to an AC power source 20B.
is applied and normal operation is restored.

FIG. 7 shows the contact 26B of the voltage detection switch 26.
is not connected to any controlled device.If there is a long power outage and the voltage detection circuit 23 is activated, the detection relay 24B is energized, and the switching contact 26C of the detection switch 26 becomes a contact. 2
An example will be shown in which when switching to the 6B side, it is not connected to any controlled device.

According to the time switch having the voltage detection circuit configured as described above, in the case of a short power outage in which the output voltage of the storage battery does not drop much, the clock mechanism and other circuits are energized by the storage battery. However, if there is a long-term power outage in which the voltage of the storage battery drops below a certain standard, the voltage detection circuit will activate and disconnect the power to the clock mechanism and other circuits, as well as the controlled It is easy to switch the circuit to the device to a specific circuit or disconnect it, so that even if the AC power is restored, the controlled device that will cause problems when the AC power is restored will not be energized. It has the following effects. Note that if the voltage of the storage battery returns to normal before it drops below the predetermined value, the clock mechanism and switching operation are operating normally, and in this case, the specific controlled device may be disconnected or There is no need for any control such as turning on electricity.
In order to prevent time lag and random switching status of self-holding relays that occur when the voltage of the storage battery drops below a predetermined value, when AC power is restored,
The system is forced to switch to a predefined state.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a time switch having a voltage detection circuit according to the present invention, FIG. 2 is a side view thereof, and FIGS. 3 to 6 are circuit configuration diagrams for explaining its operation. FIG. 7 is a circuit diagram showing another embodiment of the present invention. In the figure, 1 is a clock mechanism, 2 is a scale plate, 17, 1
8 and 19 are switching pins, 20A is an AC power supply, 21 is a power supply device, 22 is a storage battery, 23 is a voltage detection circuit,
31, 32, and 33 are controlled devices. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A power supply device that converts alternating current power into direct current, a storage battery that is charged by the power supply device, a clock device that is driven by the power supply device during normal operation and by the storage battery during a power outage, and a scale that rotates at a constant speed by the clock device. plate, a load control relay that is sequentially switched by switching pins set on the scale plate, and a self-holding relay that operates when the voltage of the storage battery falls below a specified voltage to switch the load control relay when the power is restored. A time switch having a voltage detection circuit, characterized in that it is equipped with a voltage detection circuit.