JPS60217497A - Power source circuit for safety apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field 1] The present invention relates to a power supply circuit used in safety equipment (security).

[Prior Art] In recent years, devices that utilize a voltage difference between a high voltage (constant voltage) and a low voltage have been proposed. However, in the past, no proposal has been made for a circuit that uses such equipment or a circuit that utilizes these high and low voltages.

[Object of the invention] The object of the invention is to provide a constant voltage supplied within a safety device;
A circuit is provided in which the attenuated voltage obtained by lowering the constant voltage is switched by the operation of a safety mechanism installed in the safety device, and the safety valve is driven by the voltage difference between the constant voltage and the attenuated voltage, and the lowered attenuated voltage is used. Our goal is to provide a power supply circuit for safety equipment that can

[Structure of the Invention] The power supply circuit for safety equipment of the present invention converts AC power distributed through a low-voltage distribution line into DC power at the set value of each safety mechanism in order to operate each safety mechanism in the safety equipment. An AC-DC converter, a DC-DC converter that steps down the voltage transformed by the AC-DC converter to a set voltage in order to operate a sensor provided in the safety mechanism, and a cutoff valve that opens and closes based on the voltage difference. It is composed of a voltage converted by the AC-DC converter and a voltage switching output circuit that switches and outputs the voltage converted by the AC-DC converter using a relay switch driven by a sensor output horn in the safety mechanism. Ru.

[Effects of the Invention] The power supply circuit for safety equipment of the present invention having the above-mentioned configuration can handle a constant voltage normally used in safety equipment and a step-down voltage of 6 volts or less used in a sensor section that uses water even in safety equipment. can be switched by the operation of a safety mechanism within the safety equipment, and the cutoff valve can be driven using the generated voltage difference, and a circuit J3 that uses a constant voltage and a circuit that uses a step-down voltage are configured. I can do it.

[Embodiment] FIG. 1 is an electrical circuit diagram of a security device (safety device) used for waterproof safety, which is equipped with a power supply circuit for a safety device of the present invention, which is integrated with a household interface.

Security is A(,-
A DC converter 1, a bath alarm mechanism 2 that alerts you to a certain water level in the bath, an emergency alarm mechanism 3 that alerts you to the occurrence of an emergency situation, and a crime prevention system that alerts you to intrusion by outsiders using sensors attached to windows etc. an alarm mechanism 4, a gas leak alarm mechanism 5 that senses and notifies a gas leak, a fire alarm mechanism 6 that senses and notifies the occurrence of a fire, and the gas leak alarm mechanism 5.
and a voltage switching output circuit 7 that operates in conjunction with the fire alarm mechanism 6 and outputs an output to the shutoff valve to shut off the gas supply piping in the event of a fire or gas moisture, and an auditory system that audibly alerts the security operation. It is comprised of a transmission mechanism 8 and a cancellation priority circuit 9 that operates the auditory transmission mechanism 8 and the alarm mechanisms 2 to 6 in conjunction with each other.

The AC-DC converter 1 includes a transducer 11 that converts an alternating current of 100 volts and 50 hertz or 60 hertz supplied from a low-voltage distribution line J into an alternating current of a constant set voltage that activates security; A rectifier circuit 12 converts an alternating current that is set to a constant value into a direct current by the transducer 11, and a security mechanism consisting of two systems that receives the direct current converted by the rectifier circuit 12 operates. For example, it consists of two constant voltage circuits 13 and 14 that convert to 14 volts, and a connection cord 1G that supplies electricity to the main unit 15 of the household interphone, and supplies electricity to the transducer 11 and the main unit 15 of the inter7 on. Fuse F for each road wiring
1, F2, F3, and F4 are interposed.

The bath alarm mechanism 2 uses a constant voltage of 14 volts of direct current from the AC-DC converter 1 to be used in the bath and is safe at 6 volts! DC-DC that steps down to a voltage below ~
Using the converter 21 and the step-down voltage stepped down by the DC-DC converter 21, the water level in the bath is constant (water level)
It consists of a bath sensor 22 that becomes conductive when the above conditions are established, and a bath controller 1 to roll circuit 25 that energizes the bath relay 23 and the d5 bath light emitting diode 24 when the bath sensor 22 becomes conductive. .

The emergency alarm mechanism 3 includes an emergency switch 31 that is an emergency push button, an emergency relay 32 that energizes when the emergency switch 31 is energized, and an emergency light emitting diode 33 that emits light when the emergency switch 31 is energized. Consisting of

The crime prevention alarm mechanism 4 controls a crime prevention switch 41 that is attached to a window or the like and operates using a magnet, and the crime prevention switch old.
It consists of a security controller 1 to a roll circuit 44 that energize a security relay 42 and a security light emitting diode 43 when the security switch 41 is opened.

The gas leak alarm mechanism 5 includes a gas leak sensor 51 whose electric flow rate varies depending on the gas concentration;
A level judgment circuit 52 that detects the amount of energized power and determines the level of gas leakage, and a certain level of gas leakage with a level judgment circuit 52, and has a certain period of time (for example, 30 seconds>. A delay circuit 54 that energizes the gas leakage relay 53 when the gas leakage relay 53 is energized, and a first gas leakage relay 53 that energizes the gas leakage light emitting diode 55 when the gas leakage relay 53 is energized.
It consists of a gas leakage relay switch 56.

The fire alarm mechanism 6 includes a fire detection sensor 61 that becomes conductive when the temperature exceeds a certain value, and the fire detection sensor 6.
A fire relay 62 that is energized when the fire relay 62 is turned on, and a fire light emitting diode 6 that is energized when the fire relay 62 is energized.
A first fire relay switch 64 is installed to operate in conjunction with a fire relay 62 that energizes the fire relay 6.
2, a fire test switch 65, a fire test circuit 66, and a fire alarm mechanism test means 67 for confirming the operation of the fire alarm mechanism 6.

Also, one end of the bath light emitting diode 24, emergency light emitting diode 33, crime prevention light emitting diode 43, gas leak light emitting diode 55, and fire light emitting diode 63 is connected to the light emitting diode control circuit 30, so that each flashing operation is performed. It is provided.

The voltage switching output circuit 7 is connected to the D of the bath alarm 4f42.
A second gas leak relay operates in conjunction with the gas leak relay 53 of the gas leak alarm mechanism 5, which is provided in a constant voltage circuit of 14 volts in the AC-DC converter 1 in parallel with the C-DC converter 21. It consists of a switch 57 and a second fire relay switch 68 that operates in conjunction with the fire relay 62 of the fire alarm mechanism 6, which is installed in parallel with the second gas leak relay switch 57. Relay switch 57 and second fire relay switch 68
A second gas leakage relay switch is installed in parallel with the DC-DC converter 21 downstream of the bath alarm mechanism 2. 57, Diode 7 that flows current only in one direction downstream of the second fire relay switch 68
1, and the downstream side of the connection is open at 6 volts, and is open at 14 volts.For the cutoff valve that outputs to the gas cutoff valve installed at the base of the gas supply piping. It is used as an output terminal 72.

The auditory transmission mechanism 8 includes a first oscillator 81 that oscillates a voltage with a constant waveform, a second oscillator 82 that oscillates a voltage with a constant waveform different from the first oscillator 81, and the first oscillator 81 and the second oscillator 82. is a third oscillator 83 that oscillates voltages with different constant waveforms, and a voltage-frequency conversion that receives oscillation voltages from the first oscillator 81, second oscillator 82, and third oscillator 83, and converts the oscillation voltages into respective frequencies. It consists of a circuit 84, an amplification circuit 85 that amplifies the frequency converted by the voltage-frequency conversion circuit 84, and a speaker 8G that converts the frequency signal tlj amplified by the amplification circuit 85 into sound.

The release mechanism A' priority circuit 9 is the m8 of the bath alarm mechanism 2.
The bath relay switch 91 is provided to be connected to the bath relay 23 which is connected to the first oscillator 81 when the bath relay 23 is energized, and the bath relay switch 91 is normally connected downstream of the bath relay switch 91. When the bath alarm sound release switch 92 turns off the J3 bath relay switch 91 and the emergency relay 32 of the emergency alarm mechanism 3 is energized, the second oscillator 82 etc. are connected. When the emergency relay 32 is de-energized, the emergency relay switch 93, which is provided to operate in conjunction with the emergency relay 32 connected downstream of the m8 alarm sound release switch 92, and the emergency relay switch 93 normally An emergency alarm sound release switch 9 is connected to the downstream side, and when switched, is connected to the downstream side of the bath alarm sound release switch 92.
4, the security relay 42 of the security alarm mechanism 4 is connected to the second oscillator 82 by being energized, and the security relay 42 of the security alarm mechanism 4 is connected to the second oscillator 82.
is normally connected downstream of the security relay switch 95, which is provided to operate in conjunction with the security relay 42, which is connected downstream of the emergency alarm sound canceling switch 94 when it is de-energized. d3, the security alarm sound release switch 96, which is a switch release switch connected to the downstream side of the emergency alarm sound release switch 94, and the waste leakage relay 53 of the gas leak alarm WJ5 are energized, and the third A third gas leak relay switch 91 is connected to the oscillator 83 and is provided to operate in conjunction with the gas leak relay 53 connected downstream of the security alarm sound release switch 9G when the gas leak relay 53 is de-energized. and a gas leak alarm sound release switch 98 which is normally connected downstream of the third gas leak relay switch 97 and is connected downstream of the security alarm sound release switch 96 by switching.
When the fire relay 62 of the fire alarm mechanism 6 is energized, it is connected to the first oscillator 81, and when the fire relay 62 is de-energized, the fire relay 62 connected downstream of the gas leak alarm sound release switch 98 is connected. The third part was designed to work in conjunction with the
It consists of a fire relay switch 99 and a fire alarm sound release switch 90 which is normally connected downstream of the third fire relay switch 99 and connected downstream of the gas leak alarm sound release switch 98. The downstream side of the sound release switch 9o is connected to the voltage-frequency conversion circuit 84 of the auditory transmitter 18.

Next, the operation of the security described above will be explained.

The AC-OC converter 1 converts the AC voltage supplied by the low-voltage distribution line into a constant voltage of 14 volts DC, and connects each mechanism 2 to
Supply to 9.

When the bath alarm Δ release switch 92 is connected downstream of the Omaro 1 bath relay switch 91 and the bath water level has not reached a certain value or more, the bath sensor 2
2 is not energized, and the bath controller 1 to roll circuit 25
Since the bath relay 23a5 and the bath light emitting diode 24 are de-energized by the operation of the bath relay switch 91, the bath relay switch 91 is released and
4 does not emit light.

When the bath alarm canceling switch 92 is connected downstream of the bath relay switch 91, and the bath water level reaches a certain value or more, the bath sensor 22 is set to 6 volts or less. The bath relay switch 91 is energized and output to the bath control L-roll circuit 25, and the bath relay 23 and the J bath light emitting diode 24 are energized by the operation of the A3FA bath control circuit 25.
is connected to the M1 oscillator 81, and the voltage signal oscillated by the first oscillator 81 is transmitted to the bath relay switch 91, the bath alarm sound cancellation switch 92, the emergency relay switch 93, the emergency alarm sound cancellation switch 94, and the security relay. switch 95
, security alarm sound release switch 9G, third gas leakage relay switch 97, gas leakage alarm sound release switch 98, third
Fire relay switch 99, fire alarm sound release switch 9
0. Via the voltage-frequency conversion circuit 84 and the amplification circuit 85, a speaker 86 audibly transmits that the water level in the bath has reached a certain value or higher. Further, the bath light emitting diode 24 emits light by the J'3M bath light emitting diode 24, visually indicating that the water level in the bath has reached a certain value or higher.

When the bath alarm sound cancellation switch 92 is released and the bath water level has not reached a certain value or more, the bath control circuit 25 is activated to activate the bath relay 23 and the bath light emitting diode. 24 is de-energized, the bath alarm sound release switch 92 is released, the bath relay switch 91 is released, and the auditory transmission mechanism 8 is released.
No transmission is performed, and the light emitting diode 24 for the a3 bath is also energized and does not emit light 71'.

When the bath alarm sound cancellation switch 92 is released and the water level in the bath reaches a certain value or higher, the bath sensor 22 is energized and outputs to the bath control circuit 25, causing the bath controller to switch on. By the operation of the I-roll circuit 25, the bath relay 23 and the bath light emitting diode 24 are energized. The bath light emitting diode 24 receives electricity.
The water level in the bath is illuminated to visually notify you that the water level in the bath is above a certain level. On the other hand, bath relay 23
When energized, the bath relay switch 91 is connected to the first oscillator 81, but the bath alarm sound release switch 92 is connected to the first oscillator 81.
Since M is released, the auditory transmission mechanism 8 is not used to transmit that the water level in the bath has exceeded a certain value.

The emergency alarm sound release switch 94 is the emergency relay switch 9
3, the emergency switch 31 is set to O.
When it is FF, the emergency relay 32 and the emergency light emitting diode 33 are de-energized, so the emergency relay switch 93 is connected downstream of the bathroom alarm sound release switch 92, and the emergency light emitting diode 33 does not emit light.

The emergency alarm sound release switch 94 is the emergency relay switch 9
3, the emergency switch 31 is set to O.
When the state is N, the emergency relay 32 and the emergency light emitting diode 33 are energized, so the emergency relay switch 93 cuts the energizing path upstream from the emergency relay switch 93 and connects with the second oscillator 82. The voltage signal oscillated by the second oscillator 82 is transmitted to the emergency relay switch 9.
3. Emergency alarm 8 release switch 94, crime prevention relay switch 95, crime prevention alarm release switch 96, third gas leak relay switch 97, gas leak alarm sound release switch 98
, third fire relay switch 99, fire alarm sound release switch 90, voltage-frequency conversion circuit 84, and amplification circuit 8
Emergency switch 31 audibly from speaker 8G via 5
It communicates that it has been turned on. Furthermore, when the emergency light emitting diode 33 is energized, the emergency light emitting diode 33 emits light, visually indicating that the emergency switch 31 has been turned on.

When the emergency alarm sound cancellation switch 94 is connected downstream of the bathroom alarm sound cancellation switch 92 and the emergency switch 31 is turned off, the emergency relay 32 and the emergency light emitting diode 33 are de-energized. The emergency alarm sound release switch 94 is directly connected to the downstream side of the bath W alarm sound release switch 92 without going through the emergency relay switch 93, and the J1 regular use light emitting diode 33 is also not energized and does not emit light. .

When the emergency alarm sound release switch 94 is connected downstream of the bathroom alarm sound release switch 92 and the emergency switch 31 is turned on, the emergency relay 32 (+3 and the emergency light emitting diode 33 are energized). be done.

The emergency light emitting diode 33 emits light when energized and visually indicates that the emergency switch 31 has been turned on.

On the other hand, when the emergency relay 32 is energized, the emergency relay switch 93 is connected to the second oscillator 82 . Since the emergency switch 31 is connected directly without using the auditory transmission mechanism 8,
It does not transmit that it has been turned on.

Security alarm sound release switch 9G is security relay switch 9
5, and when the security switch 41 is closed, the security control circuit 44 activates the security relay 42 and security light emitting diode 4.
3 is de-energized, so security relay switch 9
5 is connected to the downstream side of the emergency alarm sound cancellation switch 94, and the security surrounding light tie A-43 does not emit light.

The security alarm sound release switch 96 is the security relay switch 9
5 and the security switch 41 is heard, the security control circuit 44 energizes the security relay 42 and the security light emitting diode 43, so the security relay switch 95 is turned on. The energizing circuit of the cancellation priority circuit 9 upstream from the relay switch 95 is connected to the 12 oscillator 82, and the voltage signal oscillated by the second oscillator 82 is transmitted to the crime prevention relay switch 95.
, security alarm sound release switch 96, third gas leak relay switch 97, gas leak alarm sound release switch 98, third
Fire relay switch 99, fire alarm sound release switch 9
0, the speaker 86 audibly transmits through the voltage-frequency conversion circuit 84 and the amplification circuit 85 that the security switch 41 attached to a window or the like has been heard. Further, when the security light emitting diode 43 is energized, the security light emitting diode 43 emits light, visually indicating that the security switch 41 has been turned on.

When the security alarm sound cancellation switch 9G is connected downstream of the emergency alarm sound cancellation switch 94, the security alarm sound cancellation switch 41
is closed, the security relay 42 and the security light emitting diode 43 are de-energized by the operation of the security controller 1 to the roll circuit 44, and the security alarm sound release switch 96 is activated without going through the security relay switch 95. Since it is directly connected to the downstream side of the emergency alarm sound cancellation switch 94, the crime prevention light emitting diode 43 is also not energized and does not emit light.

When the security alarm sound cancellation switch 96 is connected downstream of the emergency alarm sound cancellation switch 94, the security alarm sound cancellation switch 41
When this is being heard, the crime prevention control circuit 44 energizes the crime prevention relay 42 and the crime prevention light emitting diode 43. The security light emitting diode 43 is energized and C
It emits light to visually notify that the security switch 41 has been opened. On the other hand, when the crime prevention relay 42 is energized, the crime prevention relay switch 95 is connected to the second oscillator 82, but the emergency alarm sound release switch 94 and the crime prevention alarm sound release switch 9 are connected to each other.
Since G is directly connected without going through the security relay switch 95, the security switch 4 is connected using the auditory transmission mechanism 8.
It does not communicate that 1 has been opened.

When the gas digging alarm sound release switch 98 is connected downstream of the third gas leakage relay switch 97, the gas leakage sensor 51, level determination circuit 52, and delay circuit 54
is not detecting a gas leak, the gas leak relay 5
3 is de-energized, the first gas leakage relay switch 56
is in the OFF state, the communication to the light emitting diode 55 for thread leakage 7u is carried out, and the relay switch for thread leakage 20,000 is also in the OFF state.
Since it is in the FFIA state, the cutoff valve is kept open in order to supply the cutoff valve output terminal 72 with a step-down voltage of 6 volts which has been stepped down by the DC-DC converter, and the gas supply piping is not cut off. Also, since the gas leak relay 53 is de-energized, the third gas well relay switch 97 is the security alarm sound release switch 9.
It is connected downstream of G.

When the gas leak alarm sound release switch 98 is connected downstream of the third gas leak relay switch 97, the gas leak sensor 51, level determination circuit 52 and delay circuit 5
4 detects a gas leak and determines that it is a gas leak, the gas leak relay 53 is energized, the first gas leak relay switch 5G is turned on, and the gas leak light emitting diode 55 is energized. A constant voltage of 14 volts is supplied to the cutoff valve output terminal 12 by the AC-DC converter 1 in order to emit light to visually notify the occurrence of gas leakage and turn on the second gas leakage relay switch 57. , the cut-off valve provided in the gas supply pipe is driven to disconnect the gas supply pipe to prevent gas from flowing out, and the third gas leak relay switch 97 is activated by energizing the gas leak relay 53 to disconnect the gas from the third gas supply pipe. The energizing circuit of the priority circuit with release mechanism 9 upstream of the leakage relay switch 97 is cut and connected to the third oscillator 83, so the voltage signal detected by the third oscillator 83 is transmitted to the third oscillator 83.
Gas leak relay switch 97, gas leak alarm sound cancellation switch 98, 9 third fire relay switches, fire':A
I alarm cancel switch 90. The occurrence of gas leakage is audibly notified from the speaker 8G via the voltage-frequency conversion circuit 84 and the amplification rlJ circuit 85.

When the gas leak alarm release switch 98 is connected downstream of the security alarm sound release switch 96 and the gas leak sensor 51, the safety determination circuit 52, and the delay circuit 54 do not detect a gas leak, Since the gas leakage relay 53 is de-energized, the first cassette relay switch 56 is set to O.
In the FF state, the light emitting diode 55 for waste leakage is not energized, and the second relay switch 57 for waste leakage is also in the OFF state. In order to supply a step-down voltage of volts, the shutoff valve is kept open and the gas supply piping is not shut off.

Further, the gas leak alarm sound release switch 98 is directly connected to the downstream side of the security alarm sound release switch 96 without going through the third gas leak relay switch 97.

When the gas leak alarm sound release switch 98 is connected downstream of the crime prevention III sound release switch 96 and the gas leak detector 51, level determination circuit 52, and delay circuit 54 detect a gas leak, a gas leak is detected. The relay 53 for gas leakage is energized, the first relay switch 56 for gas leakage is turned on, and the light emitting diode 55 for gas leakage is energized to emit light. JA Visually alerts you to the occurrence of a gas leak. In addition, in order to turn on the second gas leakage relay switch 57, the AC-
A constant voltage of 14 volts is supplied to the cutoff valve output terminal 72 of the DC:l inverter IF to drive a cutoff provided in the gas supply pipe to shut off the gas supply pipe and prevent gas from flowing out. On the other hand, when the gas leak relay 53 is energized, the third gas leak relay switch 97 is disconnected from the third oscillator 83, but the security alarm sound release switch 96 and the gas leak 1
Since the alarm sound canceling switch 98 is directly connected without going through the third gas leak relay switch 97, the auditory transmission of gas leak occurrence using the auditory transmission mechanism 8 is not performed.

When the fire alarm sound cancellation switch 90 is connected downstream of the third fire relay switch 99 and the first fire detection sensor θ1 does not detect a temperature above a certain value, the fire relay 62 is de-energized. 7C, the first fire relay switch 64 is in the OFF and OFF state, and the fire light emitting diode G3 is not energized, and the second fire relay switch 68 is also in the OFF state.
In the FF state, the cutoff valve is kept in the same state so that the cutoff valve output terminal 72 is supplied with a step-down voltage of 6 volts, which is stepped down by the DC-DC converter 21, and the outflow of gas is not cut off by the gas supply pipe. Also, since the fire relay 62 is de-energized, the third fire relay 99 is the gas leak alarm sound release switch 9.
It is connected downstream of 8.

When the fire alarm sound release switch 90 is connected downstream of the third fire relay switch 99 and the fire detection sensor 61 detects a temperature above a certain value, the fire relay 62 is energized and the m1 The fire relay switch 64 is turned on, the fire light emitting diode 63 is energized and emits light to visually notify the occurrence of a fire, and the second fire relay switch 68 is turned on using the AC-DC converter 1. The voltage set to 14 volts is applied to the output terminal 7 for the cutoff valve.
2 and drives the shutoff valve installed in the gas supply pipe to shut off the inside of the gas supply pipe '! j1, to prevent gas leakage and ignition of fire gas, and to energize the fire relay 62.
The third fire relay switch 99 cuts the energization path of the upstream release mechanism equipped priority circuit 9, is connected to the first oscillator 81, and is oscillated by the first oscillator 81. The voltage signal is sent to the third fire relay switch 99 and the fire pipe MI sound release switch 90. Speaker 86 via voltage-frequency conversion circuit 84 and amplification circuit 85
Provides a more audible notification of the occurrence of a fire.

When the fire alarm sound cancellation switch 90 is connected downstream of the gas leak alarm sound cancellation switch 98 and the fire detection sensor 61 does not detect a temperature above a certain value,
Since the fire relay 62 is not energized, the first fire relay switch 64 is in the OFF state, and the fire light emitting diode 6 is in the OFF state.
3 is not energized, and the second fire relay switch 68
When the output terminal 72 for the cutoff valve is in the OFF state, the DC-DC converter 21 outputs V! In order to supply the stepped down voltage of 6 volts, the shutoff valve is kept open and does not shut off the outflow of gas through the gas supply piping.

Further, the fire alarm sound canceling switch 90 is directly connected downstream of the gas leak alarm sound canceling switch 98 without going through the third fire relay isoji 99.

When the fire alarm sound release switch 90 is connected downstream of the gas leak alarm sound release switch 98 and the fire detection sensor 61 detects a temperature above a certain value, the fire relay 62 is energized and the first The fire relay switch 64 is turned on, and the fire moonlight diode 63 is energized and emits light to visually notify the occurrence of a fire. Also, in order to turn on the second fire relay switch 68, the AC-DC
A voltage of 14 volts from the converter 1 is supplied to the cutoff valve output terminal 72, which drives the cutoff valve installed in the gas supply pipe to shut off the gas supply pipe and prevent the gas from flowing out, thereby preventing the fire. prevent gas from igniting. On the other hand, when the fire relay 62 is energized, the third fire relay switch 99 is connected to the first oscillator 81, but the gas leak alarm sound release switch 98 and the fire alarm sound release switch 90 are connected via the third fire relay switch 99. Since they are directly connected without any interference, no auditory transmission of the occurrence of a fire using the auditory transmission mechanism 8 is performed.

[Brief explanation of the drawing]

FIG. 1 is an electrical circuit diagram of a security device equipped with a power supply circuit for safety devices according to the present invention.

Claims (1)

[Scope of Claims] 1) An AC-DC converter that converts AC power distributed through a low-voltage distribution line into DC at the set value of each safety mechanism in order to create each safety mechanism in a safety device;
A DC-DC converter that steps down the voltage transformed by the AC-DC converter to a set voltage in order to operate a sensor installed in the safety mechanism, and a cutoff valve that opens depending on the voltage difference, the AC-DC converter. and the voltage transformed by the AC-DC converter,
A power supply circuit for safety equipment comprising a voltage cut-off horn circuit that cuts and cuts the voltage by a relay switch driven by a sensor output in the safety mechanism. 2) The power supply for safety equipment according to claim 1, wherein the AC-DC converter converts to a DC voltage of 24 volts or less for operating each safety mechanism in the safety equipment. circuit. 3> Claims characterized in that the DC>DC converter converts direct current of 6 volts or less in order to operate a sensor applied to a part of the safety device that uses water in the safety device. The power supply circuit for safety equipment described in paragraph 1.