JPS594558Y2 - emergency lighting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an emergency lighting device that lights up an illumination lamp in the event of an emergency such as a power outage.

Conventional emergency lighting equipment of this type had a battery monitor to detect abnormalities in the secondary battery, but there was nothing to indicate abnormalities in the lighting lamps. If this occurs, it may not be able to perform its function as an emergency light, which has been a problem.

In order to solve the above-mentioned conventional problems, the present invention constantly detects abnormalities in lighting lamps during normal operation, such as lamp disconnections, poor connections, etc., and displays or reports such abnormalities in advance. Hereinafter, the present invention will be explained based on the drawings showing the embodiments thereof.

FIG. 1 shows an embodiment of the emergency light lighting circuit, and its configuration and operation will be explained.

A bridge diode D1 is installed on the secondary output side of the step-down transformer T.
is connected to form a charging power source for secondary battery B, and while the AC power supply is on, there is no need to worry about overcharging, and charging is performed using a minute current.In the event of a power outage, a relay connected to the primary side of step-down transformer T is connected. RY
When the switch SW1 is closed, a crime light lighting circuit is configured to light an illumination lamp L such as an incandescent bulb.

Between both ends of the secondary battery B, a first NPN transistor Q1 and a second NPN transistor Q1 are connected to operate in an inverting manner.
Constructs a control switch circuit consisting of transistor Q2 etc.
A light emitting diode LE is installed on the output side of the control switch circuit.
A display circuit is constructed by connecting D.

Specifically, the control switch circuit includes an emitter of a first NPN transistor Q1 and a second NPN transistor Q1.
2 and the emitter are respectively connected to the negative side of the secondary battery B, and the base of the second NPN) transistor Q2 is connected to the first NPN transistor Q2.
PN) is connected to the collector of a transistor Q1, and the collector of the transistor Q1 is connected to the positive side of the secondary battery B via a resistor R1;
The collector of transistor Q2 is connected to the positive side of secondary battery B via resistor R2 and light emitting diode LED.

Furthermore, the base of the first NPN (NPN) transistor Q1, which serves as the input section, is connected to the positive side of the secondary battery B via the resistor R3, and then via the diode D2 and the lighting lamp L, and the switch SW2 of the relay RY is connected to the positive side of the secondary battery B. The circuit is connected to the positive side of the secondary battery B through the terminal to form a lamp abnormality display circuit that lights up a light emitting diode LED to indicate if the lighting lamp L is abnormal, that is, if the lamp is disconnected or has a poor connection. ing.

The circuit operation shown in FIG. 1 is performed when the relay switch SW1. SW2 is off, and if the lighting lamp L has a failure such as disconnection or poor connection during this steady state, the first NPN transistor Q1 will turn off, so the second NPN transistor Q2 will turn off. As a result, the light emitting diode LED lights up to indicate the abnormal condition.

Conversely, if there is no abnormality in the lighting lamp L and there is a power outage, relay switch SW1. Since SW2 is turned on,
A signal current will flow through the relay switch SW2 to the base of the first NPN) transistor Q1, so that the first NPN) transistor Q1 is on and the second NPN) transistor Q2 is off, so that The light emitting diode LED does not light up, indicating that it is in a normal state.

In addition, in the circuit shown in Fig. 1, if relay switch SW2 is not provided, when relay switch SW is on, the first
The second NPN) transistor Q1 is turned off, the second NPN) transistor Q2 is turned on, and the light emitting diode LED is
The lighting lamp L turns on even though it is normal.

Therefore, this relay switch SW2 is essential.

Also, relay switch SW1. SW2 is linked,
Its opening and closing depends on the operation of relay RY.

That is, while the AC power supply is energized, relay switch SW1
．． SW2 is turned off and turned on during a power outage.

Furthermore, the diode D2 is connected to the relay switch SW1. This diode is used to prevent secondary battery B from being short-circuited when SW2 is turned on, but a high impedance resistor may be connected in place of this diode D2.

The display circuit made of the light emitting diode LED can be combined with various notification devices such as a display using a lamp or the like, or an alarm using a buzzer, etc. In the embodiment shown in FIG. Although it has been proposed, a mechanical switch configuration using a relay or the like is also possible.

Next, relay switch SW1. An embodiment in which the operation of SW2 can be performed by a composite of transistors, that is, a non-contact structure will be described with reference to FIG.

That is, in this FIG. 2, 2 of the step-down transformer T
A bridge diode D1 is connected to the next output side to configure a power source for charging the secondary battery B, and an illumination lamp L is turned on using the secondary battery B as a power source in an emergency such as a power outage, and an NPN is turned on in the event of a power outage) A closed circuit is constructed via a non-contact switch consisting of a transistor Q2.

In addition, the non-contact circuit a connects an illumination lamp L such as an incandescent bulb to the output collector of a direct-coupled amplifier circuit formed by connecting the collector of a PNP transistor Q1 and the base of an NPN transistor Q2 via a resistor R1. When the AC power supply is energized, a voltage higher than the emitter voltage is applied to the input part of this non-contact circuit a, that is, the base of the PNP transistor Q1, so that a reverse bias is applied to the base of the PNP transistor Q1. Transistor Q1 and NPN) transistor Q
PNP transistors Q1 and N
(PN) transistors Q2 are each turned on.

Specifically, a diode D2. D3, and these diodes D2.
A smoothing capacitor C is connected between the cathode of D4 and the negative side of the fission diode D1, and the anode of the diode D4 is also connected thereto.

Also, a diode D5 and a resistor R are connected between the base of the PNP transistor Q1 and the negative side of the bridge diode D1.
2 series circuits are connected, and diode D5 and resistor R2 are connected.
The cathode of the diode D4 is connected to the connection point of the diode D4.

R3 and R4 indicate resistances for preventing leakage of the PNP transistor Q1 and the NPN transistor Q2.

The operation of this non-contact circuit a is such that during normal operation, that is, while the AC power supply is energized, the base potential of the PNP transistor Q1 is the same as that of the diode D2. D3. Since the potential (reverse bias) is higher than the emitter potential due to D4, the PNP transistor Q1 is turned off, and the NPN transistor Q2 is also turned off, and as a result, the illumination lamp L is turned off.

In addition, during a power outage, the secondary output of the step-down transformer T cannot be obtained, so the potential across the capacitor C becomes zero, and as a result, a signal current flows from the emitter to the base of the PNP) transistor Q1. Q□ is turned on, and NPN transistor Q2 is also turned on, thereby lighting the illumination lamp L.

However, with this configuration alone, if the lighting lamp L is disconnected or has a poor connection, the lighting lamp L will not turn on in an emergency such as a power outage, which will cause a problem during evacuation guidance.
The present invention has a lamp abnormality detection circuit constructed as shown in FIG.

This lamp abnormality detection circuit consists of two NPN transistors Q3. A control switch circuit is configured in which Q4 is coupled to perform an inverting operation, and a display section is configured by connecting a light emitting diode LED and a current limiting resistor R5 to the collector side of the output transistor Q4 of this control switch circuit. There is.

Specifically, NPN) transistor Q3. Connect the emitter of Q4 to the negative side of secondary battery B, and
) The base of the NPN) transistor Q4 is connected to the collector of the NPN) transistor Q3, and the collector of the NPN) transistor Q3 is connected to the positive side of the secondary battery B via the resistor R6.
It is connected to the positive side of the secondary battery B via the 9 light emitting diode LED.

In addition, the base of NPN1 to transistor Q3, which is the input part, is connected to the lighting lamp L through resistor R7 and then through diode D6, and is also connected to the collector of PNP transistor Q1 in non-contact circuit a through diode D7. Connected.

The operation of this lamp abnormality detection circuit is such that when a disconnection or poor connection occurs in the lighting lamp L during normal operation, that is, when the AC power supply is energized, the lighting lamp L and the diode D6
Since the signal current that was flowing to the base of NPN transistor Q3 no longer flows through NPN transistor Q3
is turned off, and transistor Q4 (NPN) is turned on, and as a result, the light emitting diode LED lights up to indicate an abnormal state.

Further, when the lighting lamp L is in a normal state, a signal current flows through the base of the NPN transistor Q3, so the NPN transistor Q3 is turned on and the NPN transistor Q4 is turned off, so that the light emitting diode LED does not light up.

If the next power outage occurs, regardless of whether the lighting lamp L is normal or abnormal, the PNP in the non-contact circuit a)
Since transistor Q1 is turned on, diode D7. A signal current also flows to the base of the NPN transistor Q3 via the resistor R7, and as a result, the NPN transistor Q3 is turned on and the NPN transistor Q4 is turned on.
The light emitting diode LED does not light up.

In other words, during a power outage, the lighting lamp L is turned on. Therefore, during this power outage, whether or not the lighting lamp L is abnormal can be determined by checking whether the lighting lamp L is turned on or off. , there is no need to intentionally turn on the light emitting diode LED.

As described above, according to the present invention, a control circuit that detects and operates an abnormality in a lighting lamp is connected in parallel with the switch device of the emergency light lighting circuit, and the output of this control circuit is provided with a display or notification. Because the device is connected to a device that performs a Notification can be given, and as a result, it is possible to prevent the illumination lamp from not lighting up in the event of an emergency due to a power outage.

In addition, since the control circuit causes a small current to flow through the lighting lamp during normal conditions, the lighting lamp is preheated, and as a result, a rush current occurs when the switch device that lights the lighting lamp is switched. This reduces the number of disconnections of lighting lamps when switching the switch device.

Furthermore, in the present invention, the control circuit that operates upon detecting an abnormality in the lighting lamp is composed of two transistors connected across the emergency power battery and coupled to operate in reverse. Of the two transistors, the base of the transistor that serves as the human power section is connected via a diode or high impedance resistor to the connection point between the lighting lamp and a switch that closes during a power outage, and similarly to the switch that closes during a power outage. It is connected to another switch that closes when the AC power is turned on, and detects an abnormality in the lighting lamp only when the AC power is turned on, and does not detect an abnormality in the lighting lamp during a power outage. Malfunction of the device that performs display or notification when only a switch is installed without a switch, that is, the device that performs display or notification lights up or operates in the event of a power outage even though the lighting lamp is normal. It is possible to reliably prevent such malfunctions, and since the configuration requires only the provision of another switch, it is extremely simple and can be obtained at low cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an electrical circuit diagram of an emergency lighting device showing one embodiment of the present invention, and FIG. 2 is a circuit diagram showing a specific example of the same device. B...Battery, SWl, SW2...Switch, L...Lighting...Lamp, a...
... Non-contact circuit, b... Lamp abnormality detection circuit,
LED... Light emitting diode, Ql...
PNP transistor, Q2...NPN) transistor.

Claims (2)

[Scope of utility model registration request] (1) An emergency light lighting circuit including an emergency power supply battery, a lighting lamp, and a switch device for lighting the lighting lamp during a power outage, and the lighting lamp is connected in parallel to the switch device of the emergency light lighting circuit. A control circuit is connected to the control circuit that flows a small current through the lamp and operates upon detecting an abnormality in the lighting lamp.A device for display or notification is connected to the output of this control circuit, and the control circuit is connected to an emergency power source. It has two transistors connected across the battery and coupled for inverting operation. Of these two transistors, the base of the input transistor is connected through a diode or a high impedance resistor. In addition to connecting to the connection point between the lighting lamp and the switch that closes during a power outage,
An emergency switch is connected to another switch that closes in the event of a power outage, similar to the above switch, and is configured to detect abnormalities in lighting lamps only when AC power is turned on, but not to detect abnormalities in lighting lamps during power outages. Light device. (2) The control circuit includes two transistors connected across the emergency power battery and coupled to perform inversion operation, and of the two transistors, the base of the transistor serving as the input section is connected to the connection point between the lighting lamp and the collector of the NPN transistor that is turned on during a power outage, and is also connected to the collector of the PNP transistor that forms a direct connection amplifier circuit with the NPN transistor, and connects to the collector of the PNP transistor that is turned on during a power outage. 2. The emergency lighting device according to claim 1, wherein the emergency lighting device is configured such that a reverse bias is applied to the base of the PNP transistor when the current is energized, and a positive bias is applied during a power outage.