JP3499395B2 - Dwelling unit security equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dwelling unit security device, and more particularly, depending on whether the security switch is open or closed,
When power is supplied by reversing the power supply direction in the reverse order,
The present invention relates to a dwelling unit security device that performs two types of energization detection per loop.

[0002]

2. Description of the Related Art Conventionally, as in the dwelling unit security device shown in FIG. 4, a DC power supply unit AQ81 supplies a DC power supply + B.
Is supplied to the voltage detection unit 81 by a signal from the three crime prevention switches 82 and the energization indicator lamp 83, which are sensors.
Has proposed a dwelling unit security device that detects energization depending on whether the security switch 82 is open or closed.

The dwelling unit security device shown in FIG. 4 includes a direct current power supply unit AQ81 for supplying a direct current power source + B, a crime prevention switch 82, a light emitting diode which is an energizing indicator lamp 83 corresponding to the open / close state of the crime prevention switch 82, and a crime prevention device. Switch 8
The voltage detector 81 detects an output signal via the voltage detector 2. The output side of the DC power supply unit AQ81 is connected to one end of the three security switches 82, and the other end is connected to the voltage detection unit 81 for detecting the states of the three security switches 82 via a light emitting diode which is an energization indicator lamp 83. Is connected to the input side of, and this circuit is formed by one loop.

DC power supply + B is DC power supply + B → three security switches 82 → light emitting diode which is an energization indicator lamp 83 →
It is supplied through a path from the resistor R81 to the reference potential point. The voltage detection unit 81 can detect the ON / OFF state of the three security switches 82, which are sensors, but if all three security switches 82 are closed, the DC power supply unit A
When the DC power supply + B is supplied from Q81, the energization indicator lamp 83 is turned on, and the voltage detection unit 81 detects the voltage, so that a signal indicating that all the three security switches 82 are closed can be detected.

On the other hand, if any one of the three security switches 82 is open, the DC power supply + A is not supplied from the DC power supply unit AQ81, and the energization indicator lamp 83 remains off. Yes, the voltage detection unit 81 does not detect the voltage.

[0006]

However, in such a dwelling unit security device, since it is composed of one loop, only one security switch can be detected per loop, and a security system having a plurality of sensors is used. When preparing the detection of the switch, there is a drawback that the number of loops must be increased and it is necessary to prepare two terminals per loop.

The present invention has been made to solve such a problem, and in a dwelling unit security device, two series circuits each including one or more security switches and a rectifying diode are connected in parallel in opposite directions. An object of the present invention is to provide a dwelling unit security device capable of detecting ON / OFF states of two sensors in one loop by supplying DC power to the switch unit from forward and reverse directions.

[0008]

To achieve the above object, a dwelling unit security device according to the present invention comprises a diode connected in series with one or more crime prevention switches.
A switch unit in which the series circuits are connected in parallel in opposite directions to each other is provided, and an inversion switch that supplies power to the switch unit by reversing the power in the forward direction and the reverse direction and a detection unit that detects a current flowing through the switch unit. When the power is supplied in the forward direction or the reverse direction, it is characterized by comprising an energization indicator lamp that is turned on by a current flowing through the switch unit, and as the energization indicator lamp and the detection unit,
It is characterized by having a photocoupler composed of a light emitting diode and a light receiving transistor, respectively.

[0009]

In the dwelling unit security device according to the present invention, two series circuits each including a diode connected in series to one or more crime prevention switches are connected in parallel in the reverse direction, and the power supply is forward and reverse. When supplying by reversing in the direction, the detection unit can detect the current flowing through the switch unit, and the energization indicator lamp can detect lighting by the current flowing through the switch unit.

Further, a photocoupler composed of a light emitting diode and a light receiving transistor is used as the energization indicator lamp and the detector, respectively.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a dwelling unit security device of the present invention will be described below in detail with reference to the drawings. The dwelling unit security device shown in FIG. 1 according to the present invention is a switch unit 7A, 7B, 7C, which is composed of two sets of series circuits 7a, 7b consisting of one or more crime prevention switches and rectifying diodes 6a, 6b. .And diodes 9a, 9b for preventing backflow when DC power + B is supplied
, Energization indicator lamps 8a and 8b, a detection unit 5, and a DC power source +
The control unit CPU1 is composed of a DC power supply unit AQ1 that supplies B in the reverse order.

The DC power supply unit AQ1 includes a relay 2 to which the DC power supply + B is connected, and switching contacts 3a, 3b and 4a, 4b of the reversing switches 3 and 4 which are connected to the DC power supply + B and are switched by the operation of the relay 2. The relay 2 has a collector connected to it, and is composed of an NPN transistor Tr1 operated by a signal of the control device CPU1 input to the base, and a resistor R1.

Security switch and rectifying diodes 6a, 6
The series circuits 7a and 7b in which b is connected in series are connected in parallel so that two sets of switch units 7A, 7B, 7C ... When the DC power supply + B is supplied by being inverted in the forward (X) direction and the reverse (Y) direction, the switch units 7A, 7B, 7C ...
And the output signal from the energization indicator lamps 8a and 8b is detected by the detection unit 5
Is input to the input side of the controller 5 and the output of the detector 5 is the control device CP.
It is connected to the input side of U1 and the output side of the control unit CPU1 is connected to the base of the NPN transistor Tr1.

The DC power source + B is connected to the reference potential point via the collector and the emitter of the relay 2 and the NPN transistor Tr1, and the reversing switches 3 and 4 are switched depending on the conduction / non-conduction state of the relay 2 and the forward ( X) and reverse (Y) directions are reversed and supplied. The detection unit 5 performs signal detection in two types, the forward (X) direction and the reverse (Y) direction. When the DC power supply + B is supplied in the forward (X) direction, the detection unit 5 detects the current. ON / O of the crime prevention switch of the series circuit 7a by
The state signal of the FF is output and input to the control device CPU1, and the state of the crime prevention switch is determined. After a certain period of time, a signal for reversely supplying the DC power supply + B from the forward (X) direction to the reverse (Y) direction is input to the base of the NPN transistor Tr1 of the DC power supply unit AQ1, and the relay 2 is operated to invert the switch 3, The switching contacts 3a, 3b and 4a, 4b of 4 are switched to open / close state to supply the DC power source + B in the reverse (Y) direction. At this time, the series circuit 7b is detected by detecting the current in the detection unit 5.
The current is detected when the crime prevention switch is turned on or off.

When the DC power source + B is supplied in the forward (X) direction, the switching contacts 3a and 4a of the reversing switches 3 and 4 are closed and the switching contacts 3b and 4b are open. Yes, if all the crime prevention switches of the series circuit 7a having the sensor function are closed, the DC power supply unit A
The DC power supply + B is supplied from Q1 in the forward (X) direction to turn on the forward (X) direction energization indicator lamp 8a, and the signal via the energization indicator lamp 8a is input to the detection unit 5 and detected. The output signal of the sensor ON is input to the control device CPU1 to determine the state of the crime prevention switch. At this time, the reverse
The current indicator lamp 8b in the (Y) direction does not light up, and the series circuit 7
It is not affected by the open / closed state of the security switch of b.

On the other hand, when any one of the security switches of the series circuit 7a having the sensor function is in the open state and the sensor is in the OFF state, the DC power supply + B from the DC power supply unit AQ1 Regardless of whether or not power is supplied, the forward (X) direction energization indicator lamp 8a does not light up, and the detector 5
Does not detect current. Further, it is not affected by the opening / closing of the crime prevention switch of the series circuit 7b related to the reverse (Y) direction and the energization indicator lamp 8b.

When the relay 2 is in the non-conducting state,
DC power supply + B → normally closed switching contact 3a of reversing switch 3 → series circuit 7a of switch units 7C, 7B, 7A → backflow prevention diode 9a → current indicator lamp 8a → normally closing switching contact 4a of reversing switch 4 → resistor R1 → DC power supply + B is supplied in the forward (X) direction through the path of the reference potential point. On the other hand, the control device CPU1 causes the NPN transistor T
When the base of r1 is biased and the relay 2 becomes conductive, the DC power supply + B → the normally open switching contact 3b of the reversing switch 3 closed → the energization indicator lamp 8b → the backflow prevention diode 9
b → series circuit 7b of switch units 7A, 7B, 7C
→ The normally open switching contact 4b of the reversing switch 4 → the resistance R1 → the DC power source + B is supplied in the reverse (Y) direction through the path of the reference potential point.

Even when the DC power source + B is supplied in the reverse (Y) direction, whether or not the energization indicator lamp 8b is turned on and detected by the open / close state of the crime prevention switch of the series circuit 7b consisting of the crime prevention switch and the diode as described above. The presence or absence of a signal input to the unit 5 changes. In the reverse (Y) direction, DC power supply + B
Is supplied, the switching contact 3 of the reversing switches 3 and 4
b and 4b are in the closed state, and 3a and 4a are in the open state.

In the dwelling unit security device as shown in FIG. 1, diodes 6a and 6b are added to the crime prevention switch to form a sensor. However, even if the crime prevention switch and the diode are connected as shown in the circuit of FIG. Has a similar effect. That is, the crime prevention switch 57 consisting of one or more
1A and 57b are series circuits 56a and 56b including a crime prevention switch and a rectifying diode that form a sensor similar to the circuit of FIG.
Switch unit 5 composed of serial circuits 56a and 56b and crime prevention switches 57a and 57b.
By connecting 8a and 58b in parallel so that their electric polarities are opposite to each other, the DC power supply + B is reversed in the forward (X) direction and the reverse (Y) direction from the DC power supply unit AQ51 as in FIG. And supplied, the switch unit 58a,
58b security switches 57a and 57b and series circuit 56
Depending on the open / closed state of a and 56b, energization indicator lights 59a and 59b
The signal through the sensor is detected by the detector 55 as a current and
It can be detected as N / OFF state, and the control unit CPU
The relay 52 is operated by the switch 51 at regular time intervals, and the DC power supply + B is reversely reversed and supplied.

Further, the sensor in the detector 55 is turned on / off.
The method of detecting the OFF state signal is the same as the above-described detection method of FIG. In the dwelling unit security device shown in FIGS. 1 and 2 described above, as a means for detecting the ON / OFF state of the sensor, the detection unit 55 detects the current through the signal through each of the switch units 58a and 58b. In the dwelling unit security device shown in FIG. 3, as the method of detecting a signal via the switch units 66a, 66b, 66c, the above-mentioned energizing indicator lamps are used as the light emitting diodes 67a, 67b.
Alternatively, the signals may be detected by the photocoupler circuits PC1 and PC2 in which the detection units are the light receiving transistors 65a and 65b.

In the dwelling unit security device shown in FIG. 3, when the DC power supply + B is supplied from the DC power supply unit AQ61 in the forward (X) direction, the switch units 66a, 6a.
The light-emitting diode 67a of the photocoupler PC1 outputs a signal in which a current is converted into light according to the open / close state of the security switches 6b and 66c, and the signal received by the light-receiving transistor 65a is converted from light into a current (output current) and detected. , the detected signal is input to the controller CPU 61, FIG. 1 from the controller CPU 61, N for each likewise fixed time and FIG. 2
The relay 62 is operated by inputting a forward / reverse inversion control signal for supplying the DC power supply + B to the base of the PN transistor Tr61, and the inverting switches 63a, 63b and 64a, 64b are switched to set the DC power supply + B in the forward direction (X). To reverse (Y) direction and supply.

When the DC power source + B is supplied in the forward (X) direction, normally open switching contacts 63a, 6 of the reversing switches 63, 64.
4a is in the closed state and the normally open switching contacts 63b and 64b are in the open state, and the DC power supply + B is the normally closed switching contact 63a of the reversing switch 63 → switch unit 66a → 66b →
66c → backflow prevention diode 68a → light emitting diode 67a → light receiving transistor 65a → resistor R61 → reference potential point.
If all the security switches 6a, 66b, 66c are closed, the light emitting diode 67a, which is the light emitting element of the photocoupler PC1, converts the current into light, and the light is transmitted to the light receiving transistor 65a as the light receiving element. The transistor 65a converts and detects light into a current (output current), and a detection signal is input to the control device CPU 61 to determine the state of the sensor. In addition, the control device CPU61 activates the relay 62 after a predetermined time to reverse the DC power supply + B.
The signal supplied in the (Y) direction is output.

Similarly, when the DC power source + B is supplied in the reverse (Y) direction, the switch units 66c, 66b, 6
The DC power source + B via 6a is converted into light by a light emitting diode 67b which is a light emitting element of the photocoupler PC2, and is transmitted as light to a light receiving transistor 65b which is a light receiving element. ) Is converted and detected, and the detected signal is the control unit CPU
It is input again to 61 to detect the state of the sensor.

As in the dwelling unit security device shown in FIG. 3, a photo coupler PC1 is used instead of the energizing indicator lamp and the detector.
By using PC2, the insulation between the input side and the output side is perfect, the signal is unidirectional, and since there is no mechanical contact part, it is possible to perform signal processing and sensor detection without being affected by noise. Easy to electrically separate.

[0025]

As is apparent from the above description, according to the dwelling unit security device of the present invention, it is possible to detect the ON / OFF state of two types of sensors in the dwelling unit security device.
Since it can be detected by a loop, the loop can be omitted, and since it is possible to configure the crime prevention switch as a sensor only by adding a diode, it is possible to supply the dwelling unit security device of the present invention easily and at a low price. is there.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an embodiment of a dwelling unit security device of the present invention.

FIG. 2 is a circuit diagram of another embodiment of the dwelling unit security device of the present invention.

FIG. 3 is a circuit diagram using a photo coupler as another embodiment of the dwelling unit security device of the present invention.

FIG. 4 is a circuit diagram of a conventional dwelling unit security device.

[Explanation of symbols]

3, 4 ... Inversion switch 5 ... Detection sections 6a, 6b ... Diodes 7a, 7b ... Series circuits 7A, 7B, 7C consisting of a crime prevention switch and a diode ... ..Switch units 8a, 8b .... Electrification indicator lamps 67a, 67b ..... Light emitting diodes 65a, 65b .... Light receiving transistors PC1, PC2 ..

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G08B 13/00-29/00

Claims (3)

(57) [Claims] 1. Two series circuits (7) comprising diodes (6a, 6b) connected in series to one or more crime prevention switches.
a) and 7b) are connected in parallel in opposite directions to each other to provide a switch unit (7A, 7B, 7C ...), and the power source is reversed in the switch unit in the forward (X) direction and the reverse (Y) direction. A dwelling unit security device comprising a reversing switch (3, 4) to be supplied and a detection unit (5) for detecting a current flowing through the switch unit. 2. An energization indicator lamp (8a, 8b) which is turned on by a current flowing through the switch unit when the power source is supplied in a forward direction or a reverse direction. Dwelling unit security device. 3. The photocoupler (PC1, PC2) comprising a light emitting diode (67a, 67b) and a light receiving transistor (65a, 65b) as the energization indicator lamp and the detection unit, respectively. The dwelling unit security device described.