JPS6239572Y2 - - Google Patents

Description

[Detailed description of the invention] This invention operates normally without stopping even in the event of a power outage of AC commercial power, and without changing the speed under any combination of AC commercial power voltage of 100V or 200V and frequency of 50Hz or 60Hz. This relates to a time switch with power outage compensation that continues to operate.

Conventional time switches of this type use an AC synchronous motor such as a Warren motor as the drive source, and when the AC commercial power is turned on, the scale plate that opens and closes the switch section is rotated once a day by the AC synchronous motor. A device that rotates at a constant speed and winds up a mainspring, and in the event of a power outage, the mainspring continues to rotate the scale plate without stopping via a ramp mechanism, or a storage battery that rectifies the voltage of AC commercial power. At the same time, the natural vibration of the crystal oscillator is used as a vibration source and converted into a signal of one pulse per second by an electronic circuit including a frequency dividing circuit, an amplifier circuit, an output circuit, etc. to drive a DC pulse motor such as a step motor. A DC pulse motor is used to rotate a scale plate at a constant speed of once a day.

However, in the former case, power outage compensation is performed using a mainspring, so the power outage compensation time is short, and since an AC synchronous motor is used as the drive source, there is no compatibility, and if the power supply voltage and frequency are different, each It was necessary to use a synchronous motor that matched the voltage and frequency. For example, currently in Japan, four types of synchronous motors are required that are compatible with the combination of AC100V, AC200V, 50Hz, and 60Hz.
for AC100V, 60Hz, AC200V, 50Hz and
It was necessary to prepare four types for AC200V and 60Hz, which had the disadvantage of increasing costs for mass production. In addition, in the case of the latter, since the scale plate is constantly rotated based on the natural vibration of the crystal oscillator, the clock is affected by cumulative errors, causing the clock to go out of order (even if it is highly accurate with a monthly difference of +15 seconds, it will take 8 years). Later 15×12×8
= 1440 seconds = a huge deviation of 24 minutes).

This invention was made to eliminate the above-mentioned drawbacks; it has a long power outage compensation time, is compatible with the voltage and frequency type of AC commercial power supply, can be manufactured at low cost, and reduces cumulative errors. The purpose is to provide a time switch with great practical value that does not cause problems.

Embodiments of this invention will be described below with reference to the drawings. The figure is a configuration diagram showing one embodiment of a time switch according to this invention. In the figure, E is an AC commercial power source, and 1 is, for example, as shown in the figure, a transformer 2, a voltage discrimination circuit 3, a rectifier circuit 4, and a power failure detection changeover switch circuit 5. and a storage battery 6.
Reference numeral 7 denotes a DC clock circuit that outputs a clock signal of, for example, one pulse per second using the oscillation frequency of the CR oscillator 7a as an original oscillation, and 8 an AC clock circuit that outputs a clock signal using the frequency of the commercial power supply E as an original oscillation. Two frequencies of power supply E (50Hz,
60Hz), it is equipped with two types of input terminals 8a and 8b for 50Hz and 60Hz.
8b is selected and the frequency signal of the commercial power source E is supplied, a constant clock signal, e.g.
Outputs a clock signal of one pulse per second. 9 is above
It detects whether the frequency of the commercial power source E is 50Hz or 60Hz based on the oscillation frequency of the CR oscillator 7a, and switches the output terminal changeover switch 9a according to the frequency of the commercial power source E. If the frequency of the AC clock circuit 8 is 50 Hz, the frequency signal of the commercial power source E is supplied to the 50 Hz input terminal 8a of the AC clock circuit 8, and if the frequency is 60 Hz, the frequency signal of the commercial power source E is supplied to the 60 Hz input terminal 8b of the AC clock circuit 8. circuit,
10 is a DC pulse motor.

Here, the voltage discrimination circuit 3 detects whether the voltage of the commercial power supply E is 100V or 200V, and outputs a constant voltage regardless of the magnitude of the voltage. It is applied to the AC clock circuit 8 via the circuit 9. Further, when the commercial power supply E is energized, the power failure detection changeover switch circuit 5 supplies the output of the AC clock circuit 4 to the DC pulse motor 10, and also supplies the output of the AC clock circuit 4 to the DC pulse motor 10.
The output is given to the storage battery 6 for charging, and is also given to the DC clock circuit 7. When the commercial power supply E is out of power, it is detected and the switch 5a is activated.
5c is operated to disconnect the AC clock circuit 8 from the DC pulse motor 10, and at the same time, the storage battery 6 is connected to the DC clock circuit 7, and its output is applied to the DC pulse motor 10.

Reference numeral 11 denotes a disc-shaped scale plate with a time scale 11a engraved on its outer periphery, and is equipped with a setter 12, and is rotated by a DC pulse motor 10 via a transmission wheel train 13. In this case, the setter 12 can be fixed at any location on the outer periphery of the scale plate 11, thereby controlling the opening and closing of the switch 15 via the cam body 14 at a predetermined time corresponding to the fixed location.

Next, the operation of the time switch configured as described above will be explained. That is, when the AC commercial power source E is energized, the voltage discrimination circuit 3 operates first. For example, if the voltage of the AC commercial power source E is 200V, the input voltage to the rectifier circuit 4 is set to 100V using a resistor as shown in the figure. The voltage of AC commercial power supply E is divided into
In the case of 100V, 1/2 of the resistor is short-circuited to release the voltage division and operate so that AC100V is input directly to the rectifier circuit 4. Therefore, regardless of whether the voltage of the commercial power supply E is 100V or 200V, the rectifier circuit 4
A constant alternating current voltage (AC100V) is applied to the power supply frequency discrimination circuit 9, and the direct current power supply circuit 1
The output voltage is also constant regardless of the type of commercial power supply E, 100V or 200V.

Furthermore, when the AC commercial power supply E is energized, the AC clock circuit 4 is switched by the power failure detection changeover switch circuit 7.
While giving the output of the DC pulse motor 10,
The output of the rectifier circuit 4 is applied to the storage battery 6 for charging, and is also applied to the DC clock circuit 7. Here, the power frequency discrimination circuit 9 is supplied with the commercial power E of a constant voltage (AC 100V) from the voltage discrimination circuit 3, and based on the oscillation frequency of the CR oscillator 7a of the DC clock circuit 7, the supplied Detects whether the frequency of the commercial power source E is 50Hz or 60Hz, operates the output terminal changeover switch 9a according to the frequency of the commercial power source E, and supplies the frequency signal of the commercial power source E to the AC clock circuit 8. . As a result, the AC clock circuit 8 outputs a clock signal of one pulse per second to the DC pulse motor 10 with the frequency of the commercial power supply E as the original vibration. Therefore, the DC pulse motor 10 rotates, and this rotational force is transmitted to the transmission gear train 13.
The dial plate 11 is rotated at a constant speed of once per day, and the switch 15 is opened and closed via the cam body 14 at a desired time set by the setter 12.

If the commercial power supply E goes out in such a situation,
The power failure detection changeover switch circuit 5 detects this and disconnects the storage battery 6 from the rectifier circuit 4 by operating the switches 5a to 5c, connects it to the DC clock circuit 7 and drives it, and at the same time switches the AC clock circuit 8 to a DC pulse. The DC clock circuit 7 is disconnected from the motor 10, and the DC clock circuit 7 is connected to the DC pulse motor 10 instead. That is, when the commercial power supply 1 is out of power, the DC clock circuit 7 is operated using the storage battery 6 as the power supply.
is activated, and a clock signal of one pulse per second is supplied to the DC pulse motor 10 using the oscillation frequency of the CR oscillator 7a as the original vibration. Therefore, the DC pulse motor 10 continues to rotate without once stopping, and the scale plate 11 also continues to rotate, and the cam body 14 is activated at the desired time set by the setter 12 without causing a time delay. The switch 15 is opened and closed through the switch.

As mentioned above, according to this invention, the voltage of AC commercial power supply E is 100V or 200V and the frequency is 50Hz.
Since it can be used in any combination of 60Hz or 60Hz without any problems, it is possible to reduce costs in mass production. When the commercial power source E is energized, the scale plate 11 is rotated using the frequency of the commercial power source 1, which has high frequency accuracy and does not cause cumulative errors, as the original vibration, and at the time of a power outage, the scale plate 11 is rotated using a system that does not use a spring type, but also measures the cumulative error. Instead of using an expensive crystal oscillator, the scale plate 11 is rotated using the oscillation frequency of the inexpensive CR oscillation circuit 7a as the original vibration, so the power failure compensation time is long, and it is inexpensive and does not cause cumulative errors. A highly accurate time switch can be provided.

In the above embodiment, the DC power supply circuit 1 is configured to include the transformer 2, the voltage discrimination circuit 3, the rectifier circuit 4, the power failure detection changeover switch circuit 5, and the storage battery 6, but the present invention is not limited to this. . For example, the voltage discrimination circuit 3, the power failure detection changeover switch circuit 5, etc. can be configured separately and independently from the DC power supply circuit 1.

[Brief explanation of the drawing]

The figure is a block diagram showing an embodiment of a time switch according to this invention. E...AC commercial power supply, 1...DC power supply circuit, 3
... Voltage discrimination circuit, 4 ... Rectifier circuit, 5 ... Power failure detection changeover switch circuit, 6 ... Storage battery, 7 ... DC clock circuit, 7a ... CR oscillation circuit, 8 ...
AC clock circuit, 9...power frequency discrimination circuit,
10...DC pulse motor, 11...Scale plate, 1
5...Switch.

Claims (1)

[Scope of utility model registration request] When the AC commercial power supply is energized, it detects whether the frequency of the AC commercial power supply is 50Hz or 60Hz,
On the input side, there is a power supply frequency discrimination circuit that switches the output according to the frequency, and a voltage discrimination circuit that detects whether the voltage of the AC commercial power supply is 100V or 200V and outputs a constant voltage regardless of the voltage. In preparation for this, the DC pulse motor is rotated by an AC clock circuit that outputs a constant clock signal with the frequency of AC commercial power as the source vibration when AC commercial power is supplied, regardless of the frequency and voltage type of the AC commercial power. At the same time, the DC pulse motor is rotated by a DC clock circuit that uses the storage battery as a power source and outputs a constant clock signal with the oscillation frequency of the CR oscillation circuit as the source vibration. , without stopping even in the event of an AC commercial power outage, and with AC commercial power voltage of 100V or 200V and frequency of 50Hz.
A time switch characterized by rotating the scale plate without changing the speed in any combination of 60Hz or 60Hz.