JPS63311597A - Crime preventing device - Google Patents

Abstract

PURPOSE:To cause the warning display on a sensor unit side to be ceased when an informing state is set, by providing a means which selectively sets the informing state for informing of a visitor and another state for informing an abnormal case. CONSTITUTION:A means which switches the direct current to be made to flow to a circuit to a pulse-like current of such a duty that the warning lamp provided in a sensor unit cannot light at the time of informing state, is installed to a crime preventing unit. Since an input 'H' is inputted to one terminal of an AND gate 12 when the informing state is set, a signal synchronized with the transmitting signal of a transmitter 9 is outputted from the AND gate 12 and a transistor Tr2 intermittently operates and, as a result, the pulse-like current flows to the circuit 3. When the duty of the pulse-like current is set to such a degree that at which a warning lamp L2 composed of LEDs does not light, the warning lamp L2 does not light when the information state is set.

Description

[Detailed description of the invention] 【Technical field] The present invention relates to a security device.

[Background 1 Figure 3 shows the basic system of a conventional security device.
This basic system consists of security unit 1 and sensor unit 2.
It is composed of. Security unit 1, which consists of an alarm and a display, is set to an alert state! A warning set switch SW, a buzzer B and an abnormality indicator light L1, which also serve as abnormality notification means, are provided. The sensor unit 2 is also provided with a sensor (not shown) for detecting an intruder and an indicator light 2 that lights up when the alarm is set.

Both units 1 and 2 are connected via a non-polar two-core line 3, and when the alarm set switch and switch SW in the security unit 1 are turned on, the transistor in the security unit 1 shown in FIG. Tr is turned on and the base current flows through the line 3 and the sensor contact 4 on the sensor unit 2 side shown in FIG.
The signal flows to the warning indicator light L2 through the guiodo britsuno 5, lights up the warning indicator light L2, and displays that the alarm state is set.

When a sensor (not shown) provided in the sensor unit 2 detects an intruder and opens the sensor contact 4,
The total input current to the transistor 'rr is cut off, and the transistor '1' turns off. As a result of this turning off, the output of the inverter 6 is reversed from 'L' to 'H', and therefore the buzzer drive unit 7 is activated. to drive buzzer B. At the same time, the drive circuit 8 operates to light an abnormality indicator light L to indicate the occurrence of an abnormality.

The device shown in Fig. Pt56 is such a security device with a visitor notification function added. This device has 3 states: "off", "notification", and "warning"! ! Kai set switch SW,?
[It can be set using the notification set switch, etc., and the notification letter! ! ! When a sensor (not shown) operates to open the sensor contact 2 at the time of specific setting, a chime sound is emitted from the speaker S, but an abnormality alarm is not notified by the buzzer B. If the sensor unit 2 shown in Fig. 5 is used in this device as is, there will be no problem with its function as a sensor.
There is a problem in that the F'/IIE indicator light L2 lights up even when the notification state is set.

[IJ aspect of the invention] The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a crime prevention device that does not display a warning display on the sensor unit side when setting an alarm state. be.

[Disclosure of the Invention] The present invention connects a crime prevention unit and a sensor unit with a 2M line, and when an alarm is set, direct current is passed from the crime prevention unit through the line to the alarm indicator light of the sensor unit to display the alarm status, and the line In the crime prevention device, when it is detected that the sensor contact of the sensor unit inserted in series with the sensor unit is opened and the DC current is cut off, the abnormality notification means provided in the security unit is activated. a means for selecting and setting a state to be notified of, a means for operating to notify a visitor when it is detected that the sensor contact is opened at the time of setting the notification state, and a sensor for detecting a direct current flowing through the line when in the notification state. The crime prevention unit is characterized in that the security unit is provided with a means for switching to a pulsed current with a duty such that the warning indicator light provided in the unit does not turn on.

The present invention will be explained below with reference to Examples.

Figure tj41 shows the circuit configuration of the embodiment, and the security unit 1 includes the illustrated circuit and the sensor unit? ) 2 has tj
The sensor unit of the circuit shown in S4 is used.

The security unit 1 includes a chime drive ff1SIO for emitting a chime sound from a speaker S, and a buzzer drive 'FJJ section 7 for notifying an abnormality by sounding a buzzer B.
and the drive circuit 8 that lights up the abnormality indicator light 1-.
These circuits are D-type 7-lip 70-tube FF,
It is activated by the output of this 7 lip 70 knob F
F receives the transmitted signal from the oscillator 9 as a clock signal, and the D input terminal receives the output of the inverter 6.

Also, the output of the oscillator 9 is connected to the inverter 11 and the AND date 1
2 to the base of the transistor Tr2. The AND date 12 is also configured to input the contact outputs of the switch contacts ``y, s'' of the notification set switch SWo. Transistor 'r2 is connected in parallel to line #!3 via a warning set switch SW, and is designed to short-circuit line 3 when turned on.

The notification set switch SWo has three switch contacts S, ~
s2, the switch contact S is connected to the power supply +■ via a resistor, the connection point with the resistor is connected to the AND date 12, and the switch contact S2 is connected to the Q output terminal of a 7-lip 70-tube FF; A switch contact Si is inserted between the signal input terminal of the chime drive unit 10 and the Q output terminal of the 7-lip FF, and the signal input terminal of the buzzer drive unit 7 and the drive circuit 8. When setting the off state by turning off the warning set switch SW, individually set the switch contact sI to OFF, the switch contact s2 to OFF, and the switch contact S to OFF, and turn on the warning set switch SW. When setting the notification state, switch contact 5 (χ
Turn on only s2 and get a warning! ! S! Perform settings 3
At 15 o'clock, only the switch contact s2 is turned off.

Then, a g-warning! ! ! ! At the time of setting! 71!2. When set, the output of the 7th date 12 from αt becomes L'', so the transistor Tr2 is turned off, as shown in Fig. 2(a).
As shown in the figure, there is a transistor "r" on the sensor unit 2 side.
DC current is supplied as the base current of r+ through circuit R3, and the warning indicator light L of sensor unit 2 is supplied as the base current of r+.
2 lights up.

If the sensor is opened even now! The warning indicator light L2 goes out, and on the crime prevention unit 1 side, the transistor Tr+ is turned off, and the output of "I" is input from the inverter 6 to the D input of the 7-lip 70-tube FF, and the 7-lip 70-tube FF,
generates a pulse synchronized with the clock signal from the Q output. Therefore, the buzzer drive unit 7 and the drive circuit 8 operate intermittently to sound the buzzer B, and also cause the abnormality indicator light L to sound.
Make 1 blink.

Next is the notification letter! ! ! When the setting is specified, the input to one side of the AND-DATE 12 becomes 'H', so a signal synchronized with the transmission signal of the oscillator 9 is output from the AND-DATE 12, and the transistor Tr2 operates intermittently. There is a second
As shown in figure (n), the pulsed ? tf style will flow.

If the duty of this pulsed current is set so that the warning indicator light L2 consisting of a light emitting diode does not light up, this warning message will appear! ! ! When the setting is specified, the I commandment indicator light L2 does not light up as in the conventional case.

When the sensor contact 4 of the sensor unit 2 connected to the line 3 is opened due to visitor detection, the transistor Tr+ of the security unit 1 is turned off, and as a result, a pulse from the Q output of the 7 rip 70 knob FF + is generated. Accordingly, the chime drive section 10 is activated to emit a chime sound from the speaker S to notify the visitor.

In the off state, that is, in the state where the warning set switch SW is open, the transistor TrI is turned off and the 7-rip 7
A pulse is generated from the Q output of the 0-tube FF, but since the switch contact 52133 is off, the chime is not sounded, the buzzer B is sounded, and the abnormality indicator light is not lit.

[Effects of the Invention] The present invention provides a crime prevention device as described above, including means for selectively setting a notification state for notifying a visitor and a state for notifying an abnormality;
When the notification state is set, the notification means operates to notify of a visitor when it is detected that the sensor contact is opened, and the warning indicator light provided on the sensor unit, which is a direct current that flows through the line when in the notification state, does not light up. Since the crime prevention unit is equipped with a means for switching to a pulsed current with a certain duty,
By using a conventional sensor unit as it is, it is possible to add a notification function for notifying a visitor without changing the original function of a 21 indicator light provided in the sensor unit.

[Brief explanation of the drawing]

Figure rjS1 is a circuit diagram of the embodiment of the present invention, Figure 2 is a waveform diagram for explaining the operation of the same as above, Figure f53 is a circuit configuration diagram of a conventional example, Figure 4 is a circuit diagram of the security unit same as above, and Figure 5 is a circuit diagram of the same as above. FIG. 6, which is a circuit diagram of the same sensor unit as above, is a circuit configuration diagram of another conventional example. 1... Security unit, 2... Sensor unit, 3...
... Line, 4... Sensor contact, 7... Buzzer adjustment section, 8... Drive circuit, 9... Generator, 10...
・Chime drive unit, B...Buzzer, S...Speaker, L...Error indicator light, L2...1! Warning indicator light, S
W: Warning set switch, SW o: Notification set switch. Agent Patent Attorney Ishi 1) Nachi Hayabusa 2; ℃ Fig. 3 FP44 generation approx. 5 ~ salary 6 ~ S

Claims (1)

[Claims] (1) Connect the security unit and the sensor unit with a two-wire line, and when in the alert state, direct current flows from the crime prevention unit through the line to the alert indicator light of the sensor unit to display the alert status, and insert the line in series. In the crime prevention device, when it is detected that the sensor contact of the sensor unit is opened and the DC current is cut off, an abnormality notification means provided in the crime prevention unit is activated. The sensor unit is provided with a means for selecting and setting a sensor, a means for operating to notify of a visitor when it is detected that the sensor contact is opened when setting the notification state, and a direct current flowing through the line when in the notification state. A crime prevention device characterized in that the crime prevention unit is provided with means for switching to a pulsed current with a duty such that a warning indicator light does not light up.