JPS58129595A - Burglar-proof alarm - 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 The present invention relates to an improved security alarm, particularly to a means for setting vigilance when going out.

Security Alarm II [If you use it to monitor your home,
You need a set of precautions when you go out, that is, a set that monitors your home while you are away. However, with conventional burglar alarms, when you go out, you have to set up a home monitoring system [when doing so, wire a dedicated line to the front door or back door, etc., and turn it on with a special key]. Methods such as setting an alarm via a timer and then going outside within the holding time to set the alarm state are used. However, the former 0 method in the conventional method is It requires a dedicated switch and key, and the latter requires a timer that restricts human behavior.
There are problems such as the timer itself being required to have a high degree of precision. The present invention was made in view of the above points, and it uses an entrance intercom to provide a reliable and easy way to operate a dedicated line without the need for a dedicated switch. The purpose of the present invention is to provide a crime prevention alarm that can be set on alert.

Embodiments of the present invention will be described below with reference to the drawings. 11
In Figure 1, 1 is the sensor circuit, and the door lock sensor 8+
mB and Is are connected in series, and the series circuit is connected to terminals 3* and 3blC of the alarm body 2.

The door lock sensor S, RAT 181 is provided for each door, and consists of a switch that is normally on and turns off when the door is opened. Then, the alarm body J4D terminal Jbi is grounded, and the terminal 3a
is connected to one input terminal of the AND circuit 4 via the preset switch gw,1.

A DC power source 5 is supplied between the terminals 3g and Bb via a resistor Bek. The positive terminal of the DC power supply 5 is connected to a preset switch sw.

The reset terminal RKIi of the holding circuit 6 is connected to the holding circuit 6 through the reset terminal RKIi.

The preset switch 8w has terminals r@, rb(
A hidden reset switch Big is connected in parallel through the reset switch Big. The set terminal 8 of the holding circuit is connected to the terminal 8 via preset switches sw and t. In addition, the DC power supply I is connected to the terminal 9 and the preset switch 8
The signal is supplied to the warning sound generation circuit 1o via W4f. The preset switches sw and 8w4 are switched in conjunction with each other, and normally 8WH, BWs
* SW 4 is off, SW is on, and when preset operation is performed, l W 1 e 8
W # # 8 W 4 is on, gw is off 11
It can be switched to 1. The warning sound generating circuit 1° generates a warning sound signal by being supplied with a DC current I15, and its output terminal is connected to a switch circuit A8. ．． It is connected to the terminal 11 via As, l. The above switch circuit 8. is controlled on/off by a signal applied from the holding circuit through the inverter l11jf, and the switch circuit AS! The output of the holding circuit is input to the AND circuit 4, which outputs a drive signal to the alarm sound generating mechanism 13. sent as. The alarm sound generating mechanism 13 is composed of, for example, a buzzer or an electronic sound generating circuit, a speaker, and the like.

In the alarm main body 2 configured as described above, an external circuit, that is, an intercom, is connected to the terminals s, m, and xx. This intercom is entrance intercom handset 1
I'm thinking of 1. This entrance intercom handset 21 has terminals 22&.

A call switch C8 is connected between the terminals zzb and zzb via a resistor R+, and an intercom circuit consisting of a microphone 2j1 amplifier 24, a low frequency transformer 25, and a speaker 2-tatami is connected to the intercom slave unit 21.
is the terminal 22a.

Jjb is connected to terminals 321-32- of the intercom base unit 31. This intercom base unit jf includes, for example, a transmitter 33° receiver 34 using a speaker, a low frequency transformer 35, an amplification i1J#, and a hook switch F S + "
-F 8 s s Variable resistor J for volume adjustment (ring tone)
It consists of an F1 ring detection circuit 38, a ring tone generation circuit am, a resistor R3, etc., and one end of the transformer 15 is connected to the one terminal jJaK. And the other terminal 3
2b is grounded, and the resistor R3 is provided between the middle point of the winding O on the slave device connection side of the low frequency transformer 350 and the terminal 9 of the alarm main body 2.

Further, a footer switch Sr port is connected in parallel to the resistor R, and one end thereof is connected to a call detection circuit 1m. It detects the voltage drop that occurs in the resistor R1 when it is operated, and the detection signal is sent to the ringing sound generation circuit 39 and input to the terminal 8 of the alarm main body 2. The terminal 11 of the main body 2 is the terminal Jj of the intercom parent device 3.
connected to m.

Next, the operation of the above embodiment will be explained. In normal times, that is, when the alarm is not set, preset switches 8WI to Bw4 are set to S Wl, 8 Wl,
IIW4 is off and IIW is on. Therefore, the DC power supply 5 is supplied to the reset terminal of the holding circuit d through the switches gw and 1, and the holding circuit d is reset.

When the hold circuit C is reset, its output becomes 10", and the output of the AND circuit 4 becomes 10" regardless of the operation of the gate of the AND circuit 4. O” and the alarm sound generating mechanism 13
The operation will not be performed. In addition, the preset switch SW
4 is off, the supply of DC current Ill5 to the warning sound generating circuit 10 is cut off, and no warning sound is generated. When the call switch Cs of the intercom handset 21 is closed in the above state, the DC power supply 5 connects the resistor R8, the low frequency transformer 15, and the resistor 1rt.
Current flows to ground through 1. The input voltage of the ringing sound detection circuit s8 decreases due to the voltage drop across the resistor R2. This ringing detection circuit 38 detects that the ringing switch C8 has been operated due to a drop in the input voltage, and outputs a ringing detection signal to the ringing tone generating circuit s9. As a result, the ringing tone generation circuit J9 operates to generate a ringing tone signal, and the hook switch F8! , amplification 1) 31% hook switch F8
．． .

It is output to the transmitter s3 through the variable resistor 3'it-, and a ringing tone is generated. Further, the detection signal output from the ringing sound detection circuit 38 is input to the terminal 8 of the alarm body 20, but is not sent to the holding circuit 6 because the preset switch 8W is turned off. As described above, in normal times, after a call is made, by picking up the handset 11, 34t, the seven switches FSI to FB are switched, and the base unit 31 and the handset 21 become ready for communication. As mentioned above, in normal times, the call switch C
The calling operation is performed by operating I, and the door is closed. Even if the alarm is activated, the alarm will not sound. Therefore, the door can be opened and closed freely.

However, when setting the alarm when going out,
First, switch the preset switches swl to 5w41 and select iiw, sw, sw.

t on, IIW, l off. sw by operating the preset switches 8W to SW4.

When sw*o is turned on, the sensor circuit 1 is connected to the AND circuit 4, and when sw*o is turned off, the reset input to the holding circuit 1 is disconnected. Further, when the switch SWs is turned on, the terminal 8 is connected to the holding circuit C, but at this point, since the calling detection circuit J8 is not outputting a calling detection signal, the holding circuit - is held in the reset state. When this holding circuit 6 is reset, its "0#" output signal is inverted to "1" by the inverter 12, and the switch circuit S
, the switch circuit III is in the on state.

Furthermore, sweets? When the number IW is turned on, the DC power supply 5 is supplied to the switch circuit 8 and the warning sound generating circuit 1. Therefore, the switch circuit Mg is turned on, and the warning sound generating circuit 10 outputs a warning sound signal. This warning sound signal is output from the terminal 11 via the switch circuits M S and I S, and is further output from the intercom base unit 3.
In this way, the speaker 26 is driven by the warning sound signal from the warning sound generating circuit 10, and a warning sound is generated. Also, as mentioned above, the holding circuit C
is held in the reset state, the door lock sensor 8. Regardless of the operation of the xiis, the output of the AND circuit 4 is also "O", and the alarm sound generating mechanism 1j is maintained in a non-operating state. Therefore, in this state, the door lock sensor is
8, ~Door with SS [Alarm sound will not be generated even if you open and close it and go outside] Then, go outside and make sure that each door is closed [After confirming, turn the call switch on the intercom handset 21. fcs! -Operation Sui. When this ringing switch C8 is operated, the ringing detection circuit S8 is activated and outputs a ringing detection signal, causing the ringing tone generating circuit 39 to generate a ringing tone signal and driving the transmission @SS@0. The call signal output from S# is sent to the holding circuit 'd via terminal 8 and preset switch tB"1lst-.
is input to the set terminal 8 of the holding circuit-t set.

As a result, the output of the holding circuit g2) becomes "1" and the output of the inverter 12 becomes "0", causing the switch circuit g2) to become "0".
+t-off 0 Therefore, the warning sound signal output from the warning sound generating circuit 10 is blocked by the switch circuit 81, and the warning sound that had been output from the speaker j- until then stops.

Next, the output of the holding circuit -0'''11 is input to the AND circuit I, so that the alarm enters the warning screen.

However, in the above-mentioned alarm state, when the door is opened by an external intruder etc. and the door lock sensors -8, -5 are activated, terminal No. 3 of the alarm body 2 is disconnected from the ground, and the terminals 31& The potential of this terminal 3 is raised to the 11'a level by the DC current i15, and the preset switch 8W.

[Since the signal is supplied to the AND circuit 4 through This signal is sent to Jj, which activates the alarm sound generating mechanism Jj and issues an alarm.

Next, the alarm state is set, and when the user returns home from outside, etc., a hidden reset switch fBill installed in a place that is difficult for others to see is operated to remove the alarm state tS. That is, when the hidden reset switch B81fi is created, the contacts of the switch SW in the OFF state Im are short-circuited by the IIL switch B8, and the DC power supply 6 is connected to the holding circuit C.
is supplied to the reset terminal R of. As a result, the holding circuit i
is reset and its output becomes 10", closing the gate of AND circuit 4. Therefore, after that, door lock sensor 8
Even if 1~8s is activated, the output of the AND circuit 4 is maintained at 10", and the alarm sound generation mechanism IS does not operate.Then, operate the hidden reset switch ngvt as described above to reset the holding circuit d After that, open the door, enter the room, and operate the preset switches SWI~8W4Yt to return to the normal state, that is, SW.

tlW,, l1W4 t off, mWxk on status l! Return to After the preset switches gw and -5w4 are switched to the normal state, the holding circuit I is not set even if the call switch CB is operated, and the door can be opened and closed freely without having to glance.

In the above embodiment, a hidden reset switch B81 is provided to reset the holding circuit 1t when returning home.
As shown in Fig. 12, by configuring the output of the AND circuit 4 to be supplied to the alarm sound generation mechanism IS via a universal circuit JJk with a time period of several tens of seconds or several minutes, a hidden reset switch Bll is not required. You can do that. That is, when returning home, the door YtrIa key and the door lock sensor @, ~B are activated, and the AND circuit 4 outputs the ``''1111 signal, but the preset switches BW, ~8w4 are switched within the set time of the kite circuit 41. By doing this, the function of the alarm sound generation mechanism 13 can be stopped before the alarm sound starts to sound.

Further, in the above embodiment, the case where the alarm device is provided with the DC power source 5 is shown and 9 is the DC power source tf! provided in the intercom. Of course, it is also possible to use

As described above, according to the present invention, the alarm can be set by using the call switch of the entrance intercom, and there is no need for a dedicated switch in the dedicated entrance line. In addition, the warning sound will be generated when the alarm S is preset, and the warning sound will stop when the setting operation is completed. Mistakes can be reliably prevented.

[Brief explanation of the drawing]

FIG. 311 is a circuit diagram showing one embodiment of the present invention, and FIG. 2 is a circuit diagram showing another embodiment of the present invention. l...senner circuit, 2...alarm body, e...
Holding circuit, 10... Caution sound generation circuit, IS... Alarm sound generation mechanism, 21... Intercom handset, 31...
Intercom base unit, 41...Delay circuit, 81~8°・
...Door lock sensor-1B5...Hidden reset switch, gw, ~gw4...Preset switch, m8.
．． All... switch circuit.

Claims (2)

[Claims] (1) Door open state [door lock sensor detects,
Resetting mechanism [9 holding circuits and the above door lock sensor]
and a logic circuit into which the output of the holding circuit is input, a preset switch that enables at least a set input to the holding circuit, and an intercom installed outdoors that generates a warning sound signal by presetting the preset switch. A warning sound generation circuit that sends out the warning sound to the handset and a set input to the holding circuit can be made by operating the preset switch, and in the next state, the holding circuit t is set by operating the call switch of the intercom handset, and the warning sound is set. A burglar alarm system characterized by comprising means for generating and stopping the alarm, and an alarm sound generating mechanism operated by the output of the logic circuit when the door lock sensor is activated in the set portion of the holding circuit. (2) The output of the AND circuit is supplied to the alarm sound generating mechanism after a predetermined time delay by the kMK circuit. The security alarm described in Section 1 of Iris.