JPH08102201A - Emergency lamp - Google Patents

Abstract

PURPOSE: To provide such an emergency lamp as being capable of displaying a position during power failure and precluding its use except during power failure. CONSTITUTION: An emergency power circuit 18 outputs a failure signal during power failure and a takeoff signal during takeoff. A failure detecting circuit 34 outputs a failure detecting signal in response to the failure signal. A takeoff detecting circuit 52 outputs a takeoff detecting signal in response to the takeoff signal. A lighting circuit 62 flashes a lamp in response to the failure detecting signal and holds the lamp 60 in a lighting condition in response to the takeoff detecting signal. When the takeoff signal is issued except during the issue of the failure signal, a burglar-proof circuit 56 prevents the takeoff detecting signal to be output from the takeoff detecting circuit 52 and precludes its use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency light which is detachably installed on a wall surface or the like and is detached and used in the event of a power failure. .

[0002]

2. Description of the Related Art Many conventional emergency lights of this type use a battery as a power source, and can be turned on by removing them from a fixture fixed to a wall or the like, and can be operated by a switch like a normal flashlight. It was lit by.

[0003]

The above-mentioned conventional emergency light is
Since it did not light up unless it was removed, there was a problem that it was difficult to find the emergency light in the event of a power failure, and the location had to be confirmed in advance.

Further, since the battery is used as a power source, it is necessary to periodically check the battery life.

Further, when a secondary battery charged from a commercial power source is used as a power source, there is a problem that the cost becomes high and the risk of theft increases.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to display that there is a power failure and its position during a power failure and prevent theft since it cannot be used except during a power failure. It is to provide emergency lights that can

[0007]

An emergency light of the present invention has a power supply circuit for supplying power from an output end and an input end that can be inserted into and removed from the output end of the power supply circuit, and is supplied by the power supply from the power supply circuit. An emergency power supply circuit that outputs a power failure signal when the power supply from the power supply circuit is stopped while being charged and outputs a removal signal when the input end is disconnected from the output end of the power supply circuit, and the removal signal is generated. A power failure detection circuit that outputs a power failure detection signal when the power failure signal occurs, and a removal detection circuit that outputs a removal detection signal when the removal signal occurs when the power failure signal occurs; And a lamp connected to the power supply circuit for flashing the lamp in response to the power failure detection signal, and holding the lamp in a lighting state in response to the removal detection signal. And lighting circuit, is made of.

Further, the emergency light of the present invention prevents the removal detection signal from being output from the removal detection circuit when the removal signal is generated when the power failure detection signal is not generated, The anti-theft circuit is provided which enables the removal detection signal to be output from the removal detection circuit in response to the generation of the power failure detection signal.

[0009]

In the emergency light of the present invention, when a power failure occurs and the power supply from the power supply circuit to the emergency power supply circuit is stopped, the power failure signal is output from the emergency power supply circuit. The power failure detection circuit outputs a power failure detection signal in response to the power failure signal, and the lighting circuit causes the lamp to blink in response to the power failure detection signal. Further, when the emergency light body is removed from the installation site and the emergency power supply circuit is disconnected from the power supply circuit, a removal signal is output, and the removal detection circuit outputs a removal detection signal in response to this. The lighting circuit holds the lamp in a lighting state in response to the removal detection signal.

On the other hand, when the removal signal is generated when the power failure signal is not generated, the anti-theft circuit prevents the removal detection signal from being output from the removal detection circuit. As a result, even if the emergency light body is removed except when there is a power failure, the removal detection signal is not generated and the lamp does not light.

[0011]

1 is a circuit diagram of an emergency light according to a first embodiment of the present invention. A power supply circuit 2 includes a commercial power supply 4, a rectifying diode 6 and a current limiting resistor 8 connected in series with the commercial power supply 4, a Zener diode 10 and a capacitor for stabilizing current and voltage. 12 and a resistor 1 that forms a closed circuit with an emergency power supply circuit, which will be described later when a power failure occurs
4 and output terminals 16a, 1 that normally output a predetermined DC voltage.
6b and. The power supply circuit 2 in this embodiment is housed inside a fixture fixed to a wall surface or the like in a room, and other circuits to be described later are housed inside the main body of the emergency light to be removed and used.

Reference numeral 18 denotes an emergency power supply circuit, and the power supply circuit 2
Input ends 20a and 20b that are removably connected to the output ends 16a and 16b, and a diode 28 for preventing backflow at one end.
Is connected to one input end 20a through the other end and the other end is connected to the other input end 20b, and a storage circuit 22 composed of a large-capacity capacitor or a secondary battery that is installed and is connected in series between the input ends 20a and 20b. Are connected in series between the resistors 24 and 26 from which the power failure signal A is taken out from each other, the connection point between the storage circuit 22 and the diode 28, and one input end 20a. The resistor 30 and the diode 3 from which the removal signal B is taken out
2 and.

Reference numeral 34 is a power failure detection circuit, which inputs the power failure signal A to one input terminal and inputs the removal signal B to the other input terminal via the inverter 38.
6, a NOR gate 40 that outputs the output signal to one input terminal and outputs a power failure detection signal, and a pulse output that outputs a clock pulse when the power failure detection signal is input and is applied to the other input terminal of the NOR gate 40 Circuit 42,
It consists of The pulse output circuit 42 includes a current limiting resistor 44 and a backflow prevention diode 46, which are connected in series with each other between the output end of the NOR gate 40 and the other input end, and the output end of the diode 46 and the ground. And a capacitor 50 and a resistor 50 that are connected in parallel with each other and charge and discharge with a predetermined time constant.

Reference numeral 52 denotes a removal detection circuit, which inputs a removal signal B to one input terminal and, in the present embodiment, inputs a power failure signal A to the other input terminal via an anti-theft circuit which will be described later. Of the NOR gate 54 for outputting.

Reference numeral 56 denotes an anti-theft circuit, which inputs the power failure signal A to the set input S, inputs the signal from the pulse output circuit 42 to the clock input C, and grounds the data input D.
It is composed of a flip-flop 58 for applying the signal C from the output Q to the other input terminal of the NOR gate 54.

A lamp 60 has one end connected to the emergency power supply circuit 18 and the other end connected to the ground via a lighting circuit described later.

Reference numeral 62 denotes a lighting circuit for lighting the lamp, which inputs the power failure detection signal and the removal detection signal from the power failure detection circuit 34 and the removal detection circuit 52.
4 and a transistor 66 whose collector is connected to the other end of the lamp 60, the output signal D of the OR gate 64 is applied to the base via a resistor 68, the emitter is grounded, and which is connected to the base via a resistor 70. ,,.

Next, the operation of the circuit in the first embodiment will be described based on the time chart shown in FIG. First, when electric power is supplied from the commercial power supply 4, a voltage Vo is generated at the output of the diode 6, and a predetermined DC voltage is output from the output terminals 16a and 16b of the power supply circuit 2,
As a result, the storage circuit 22 is charged. At this time, both the power failure signal A and the removal signal B are kept at the H level. Therefore, the OR gate 36 that inputs the power failure signal A
Is at the H level, and the power failure detection signal output from the NOR gate 40 is kept at the L level. Further, the removal detection signal output from the NOR gate 54 which receives the removal signal B is also kept at the L level. Therefore, since the output signal D of the OR gate 64 is also kept at the L level, the transistor 66 is in the non-conducting state and the lamp 60 is in the non-lighting state.

In this state, a power failure occurs and the commercial power source 4
When the power supply from the power supply circuit 2 is stopped, the power supply from the power supply circuit 2 is also stopped, and the resistance values R3 and R of the resistors 30, 24 and 26 are stopped.
The power failure signal A becomes L by being divided by 1 and R2.
Become a level. At this time, the resistor 3 is removed from the storage circuit 22.
Since the current flows through 0, the diode 32, and the resistor 14, the removal signal B is maintained at the H level.
In this way, when only the power failure signal A becomes L level, the output signal of the OR gate 36 becomes L level, whereby the power failure detection signal output from the NOR gate 40 becomes H level.
When this power failure detection signal becomes H level, the condenser 4
When 8 is charged to a predetermined voltage, the other input end of the NOR gate 40 becomes H level and the NOR gate 40
The power failure detection signal output by is at L level. When the power failure detection signal becomes L level in this way, the charged capacitor 48 is discharged, the other input end of the NOR gate 40 becomes L level again, and the NOR gate 40 outputs the power failure detection signal at H level.
To level. When the power failure signal A becomes L level, the above operation is repeated at a predetermined interval, and a pulse is generated in the power failure detection signal. The pulse generated in the power failure detection signal in this way is applied to the base of the transistor 66 via the OR gate 64 to intermittently make it conductive. As a result, current flows intermittently from the power storage circuit 22 to the lamp 60, and the lamp 60 blinks.

When the main body of the emergency light is removed while the lamp 60 is blinking as described above, the emergency power supply circuit 18 is disconnected from the power supply circuit 2 and the resistor 14 is disconnected, so that the removal signal B becomes L level. Become. When the removal signal B becomes L level, the output signal of the OR gate 36 which inputs it through the inverter 38 becomes H level, and the NOR gate 40 which receives this H level signal holds the power failure detection signal at L level. On the other hand, when the power failure signal A becomes L level, the set state of the flip-flop 58 is released, and thereafter, the signal C from its output Q is at L level in synchronization with the pulse generated in the power failure detection signal. I have to. Therefore, when the removal signal B becomes L level, the removal detection signal output from the NOR gate 54 becomes H level, and the transistor 66 passes through the OR gate 64.
Is applied to As a result, the transistor 66 becomes conductive and the lamp 60 lights up.

On the other hand, when the emergency light body is removed before the power failure as described above, the power failure signal A and the removal signal B simultaneously become L level. Therefore, the output signal of the OR gate 36, which inputs the removal signal through the inverter 38, is maintained at the H level, and the power failure detection signal output by the NOR gate 40 is maintained at the L level. Therefore, even if the power failure signal A goes to the L level and the set state is released, the flip-flop 58 maintains its output Q at the H level because no pulse is generated in the power failure detection signal. Therefore, the removal detection signal output from the NOR gate 54 is also held at the L level, and as a result, the transistor 66 is held in the non-conducting state and the lamp 60 does not light up, so that it can be used except during a power failure. Can not.

In the first embodiment, the theft is prevented by making it impossible to use it except at the time of power failure. However, when it is installed at home or in a place used by a specific person, it is stolen. Since it is not necessary to prevent this, the function can be omitted. That is, the antitheft circuit 56 shown in FIG. 1 is removed, and the power failure signal A is directly applied to the NOR gate 54 in the removal detection circuit 52 as shown in FIG. With this modification, when the emergency light main body is removed and the power failure signal A and the removal signal B both become L level, the removal signal output from the NOR gate 54 becomes H level, and the transistor 66 becomes conductive. The lamp 60 lights up. The circuit other than the above changes is the same as the circuit shown in FIG. 1, and therefore the operation for blinking the lamp during a power failure is the same as the circuit shown in FIG.

FIG. 4 is a circuit diagram of an emergency light according to a second embodiment of the present invention. The configuration of the power supply circuit 2 and the emergency power supply circuit 18 is different from that of the first embodiment shown in FIG. All the circuits have the same configurations and operations as those of the first embodiment, and are designated by the same reference numerals. In this embodiment, the commercial power source 10
Output terminals 116a, 1 such as an outlet connected to 4
16b directly to the input terminal 120 of the emergency power supply circuit 118.
a and 120b are removably connected. The emergency power supply circuit 118 in this embodiment has input terminals 120a, 1
DC composed of a rectifying diode 106 and a current limiting resistor 108 connected in series to a commercial power source 104 via a 20b and a zener diode 110 connected between the resistor 108 and an input end 120b for stabilization. A power supply circuit 111 and a large-capacity capacitor, one end of which is connected to one output of the DC power supply circuit 111 through a backflow prevention diode 128 and the other end of which is connected to the other output of the DC power supply circuit 111 and which is grounded. A storage circuit 122 made up of a secondary battery, resistors 124 and 126 connected in series between the outputs of the DC power supply circuit 111 and from which the power failure signal A is taken out, and a connection point between the storage circuit 122 and a diode 128. And the other end of the storage circuit 122 are connected in series with each other, and the removal signal B
Is composed of a resistor 130 and a switch 131 for taking out. The switch 131 is normally in the ON state, and may be a manual type in which the user turns off the emergency light after removing it from the commercial power supply 104. It may be an automatic type that is attached to bring it into contact with a wall or the like to be turned on, and detached to be turned off.

Next, the operation of the circuit in the second embodiment will be described. The emergency power supply circuit 1 modified as described above
The circuits other than 18 are the same as those of the first embodiment shown in FIG. 1, and the time charts of the signals A to D are also the same, so the operation of the emergency power supply circuit 118 will be mainly described. First, when power is supplied from the commercial power source 104, the power storage circuit 122 is charged as in the first embodiment, and the power failure signal A and the removal signal B are maintained at the H level. In this state, there is a power failure and commercial power source 1
When the power supply from 04 is stopped, the power failure signal A becomes L level. At this time, the storage circuit 122 to the resistor 130
Since the current flows through the switch 131 and the switch 131, the removal signal B is maintained at the H level. As a result, similarly to the above-described first embodiment, a pulse is generated in the power failure detection signal output from the power failure detection circuit 34, which causes the lamp 60 to operate.
Flashes.

In this state, the emergency light turns on the commercial power source 10
When the switch 131 is removed from No. 4 and the switch 131 is turned off, the current flowing through the resistor 130 is cut off and the removal signal B becomes L level. When the removal signal B goes low, the removal detection signal output by the removal detection circuit 52 goes high, as in the first embodiment.
As a result, the lamp 60 is turned on.

Since the antitheft circuit 56 is also provided in the second embodiment, the removal detection signal is generated even when the emergency light is removed and the switch 131 is turned off except when there is a power failure, as in the first embodiment. Is maintained at the L level and the lamp 60 does not light.

In both the first and second embodiments, the lamp 60 blinks at the time of a power failure to display its position and to indicate that there is a power failure. As shown in FIG. 5, by connecting the output of the NOR gate 40 in the power failure detection circuit 34 in each embodiment with the alarm sound generation circuit 200 including the sounding circuit 202 and the speaker 204, a pulse generated in the power failure detection signal is generated. An intermittent alarm sound can be generated in response.

[0028]

According to the present invention, by blinking the lamp at the time of power failure, the position can be displayed and an emergency can be notified, and thereafter, the emergency light or the emergency light main body can be removed from the installation place. Since the lamp is turned on, the effectiveness of the emergency light can be improved.

By providing a theft prevention circuit,
Since it is possible to prevent the lamp from being turned on at times other than when there is a power failure, it is possible to prevent theft and install it in a public place or the like where an unspecified number of people can use.

Further, by preventing theft, it becomes possible to use a storage circuit such as a secondary battery, and it becomes unnecessary to check the battery life.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an emergency light according to a first embodiment of the present invention.

FIG. 2 is a time chart of signals in the circuit shown in FIG.

FIG. 3 is a circuit diagram showing a partially modified example of the emergency light shown in FIG.

FIG. 4 is a circuit diagram of an emergency light according to a second embodiment of the present invention.

FIG. 5 is a circuit diagram showing a modified example in which an alarm sound generation circuit is attached to the emergency light according to the embodiment shown in FIG.

[Explanation of symbols]

 2 power supply circuit 4, 104 commercial power supply 18, 118 emergency power supply circuit 34 power failure detection circuit 52 removal detection circuit 56 anti-theft circuit 62 lighting circuit 60 lamp

Claims (4)

[Claims] 1. A power supply circuit which supplies power from an output end, and an output end of the power supply circuit, which has an input end that can be inserted into and removed from the power supply circuit, is charged by power supply from the power supply circuit, and is supplied from the power supply circuit When a power failure signal is output, a power failure signal is output, and a removal signal is output when the input terminal is detached from the output terminal of the power supply circuit; and a power failure is generated when the power failure signal is generated when the removal signal is not generated. A power failure detection circuit that outputs a detection signal, a removal detection circuit that outputs a removal detection signal when the removal signal occurs when the power failure signal is generated, a lamp connected to the emergency power supply circuit, and A lighting circuit that blinks the lamp in response to a power failure detection signal, and holds the lamp in a lighting state in response to the removal detection signal. Emergency light. 2. An input end that can be freely inserted into and removed from an output end of an outlet connected to a power source, and a switch that outputs a removal signal by switching the state when the input end is removed from the output end, An emergency power circuit that outputs a power failure signal when the power supply from the power source is stopped and the power supply from the power source is stopped, and a power failure detection signal when the power failure signal occurs when the removal signal is not generated A power failure detection circuit that outputs, a removal detection circuit that outputs a removal detection signal when the removal signal occurs when the power failure signal is generated, a lamp connected to the emergency power supply circuit, and the power failure detection A lighting circuit that blinks the lamp in response to a signal and holds the lamp in a lighting state in response to the removal detection signal. Emergency light. 3. When the removal signal is generated when the power failure detection signal is not generated, the removal detection signal is prevented from being output from the removal detection circuit and is responsive to the power failure detection signal. The emergency light according to claim 1 or 2, further comprising: an anti-theft circuit that enables the removal detection signal to be output from the removal detection circuit. 4. The emergency light according to claim 1, further comprising an alarm sound generation circuit that generates an alarm sound in response to the power failure detection signal.