JPS5820079B2 - Keihou Souchi - Google Patents

Description

[Detailed Description of the Invention] This invention provides an alarm system that notifies many households of the occurrence of an emergency such as robbery or fire in an area where many households that receive television services live. An alarm device that can be transmitted very quickly by using a joint reception facility, is highly reliable, and can be installed at low equipment costs. The aim is to provide equipment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1, a drawing showing an embodiment of the present application, will be described below.

In the communal reception facility, 1 is a main line illustrated as a transmission line, 2 is a line amplifier, and is supplied with power by a power supply device 3.

Reference numeral 4 denotes a branch, which is exemplified as a member for communal reception, and is provided to distribute television signals from the main line 1 to the communal reception block 5.

6 is a branch line exemplified as a transmission line, and 7 is a distributor exemplified as a communal reception member, which is of a current passing type.

8 is a distribution line illustrated as a transmission line, and 9 is a television connection terminal, which is provided at each subscriber's home 10.

In addition, in such a communal reception facility, coaxial cables are mainly used as the transmission lines L6 and L8, as is well known.

Next, in the base unit designated by reference numeral 11, 12 is an alarm power source, which uses a DC power source as shown in the figure.

Note that an AC power source may be used for this purpose.

Next, in a connection circuit for connecting this power supply 12 to the transmission line 6, 13 indicates a cyrisk, and SCR, TRIAC, DIAC, etc. are used.

14 is a relay, and 14a, 14b, 14c, and 14a indicate its contacts.

(The figure shows a non-operating state.) 15 is a power source for operating the relay 14, 16 is a release switch, and 17 is a resistive element used as necessary to limit the gate current of the thyristor 13. It is something.

Note that 18 is a display lamp, and 19 is a power source.

Next, 20 and 21 are capacitors, which are provided to prevent the current from the alarm power source 12 from flowing to the main line 1 side and the TV connection terminal 9, respectively.

Next, at each subscriber's home 10, 22 is a transmitter, which is a push button switch or a switch activated by fire.

A diode 23 is provided to prevent wasted power from being consumed even if the transmitter 22 is in a closed state when the current from the power source 12 is sent.

Reference numeral 24 denotes a resistive element, which is provided to block high frequency currents such as television signals and to limit the gate current of the Cyrisk 13.

25 is a lamp provided to notify the closed state of the transmitter 22.

Reference numeral 26 denotes an alarm, which may be a well-known alarm such as a buzzer, bell, or lamp.

27 is a diode, which connects Cyrisk 1 via the alarm 26.
This is provided to prevent the gate current No. 3 from flowing.

28 is a high frequency choke coil.

In the above configuration, when the transmitter 22 is closed at one of the many subscriber homes 10, the distribution line 8,
The gate current of the thyristor 13 flows through transmission paths such as the distributor 7 and the branch line 6.

Then, the thyristor 13 is turned on, the relay 14 is activated, and its contacts 14a to 14d are switched.

By switching these contacts, the television signal from the main line 1 is cut off, and the alarm power supply 12 is connected to the transmission line, and the current is sent to each subscriber's home 10 via the transmission path and is distributed there. Activate the alarm 26.

On the other hand, the display lamp 18 of the base unit 11 also lights up to notify that the alarm device is in operation.

After the alarm has been issued in this way and the necessary measures have been taken, the release switch 16 is opened.

Then, the relay 14 returns to its original state and each contact returns to the state shown in the figure again, entering a standby state.

As described above, in this invention, when one of the subscribers operates the transmitter 22 due to the occurrence of an emergency situation, the current for activating the alarm 26 as described above is supplied from the base unit 11. Since the alarm is sent to all of the subscriber's homes 10, all of the alarms 26 can be activated at the same time, which has the advantage that the occurrence of an emergency can be communicated extremely quickly.

Moreover, since a television transmission path is used to send the above-mentioned current to each subscriber's home 10, by using the television every day, the alarm transmission path between the main unit 11 and each subscriber's home 10 becomes It is possible to constantly check that the wire is not disconnected, and extremely high reliability can be obtained in communicating the occurrence of an emergency situation as described above.

Moreover, even though the present invention has the above-mentioned excellent features, the main unit 11 is configured to connect the power source 12 for alarm operation and this power source to the transmission line in response to a command from the transmitter 22. In addition to having a simple configuration consisting of only a connecting circuit, each subscriber's home 10 also has a transmitter for sending commands to the connecting circuit of the base unit 11, and is activated by the alarm current sent from the base unit 11. Since it has a very simple configuration that only requires the installation of the alarm 26, it has the advantage that it can be installed at a very low equipment cost.

Further, the present invention provides that even if a common television reception facility is used as described above, each subscriber's home is equipped with an alarm device that emits an alarm sound separately from the television receiver. Therefore, when the above-mentioned alarm is issued, the above-mentioned alarm will sound independently in each subscriber's home regardless of the TV reception status (on or off), which has the effect of quickly conveying the alarm to the subscriber. .

Moreover, in the present invention, when sending the above-mentioned warning,
Since the transmission of the television signal is cut off by the contact point 14a installed in the branch line 6, for example, if the television is playing at a high volume at the subscriber's home, the sound is cut off. Keep the subscriber's house quiet and tell the subscriber 1-something is wrong.

'', and furthermore, it is possible to set off the alarm in the subscriber's home in such a quiet state while alerting the subscriber, making it possible to transmit the alarm extremely reliably. It has the effect of making you feel relaxed.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a circuit diagram. L6, 8...Transmission line, 10...
...Subscriber's home, 11...Base unit, 22...
・・・・・・Transmitter, 26・・・・・・Alarm, 12
・・・・・・・・・Alarm power supply.

Claims (1)

[Claims] 1. In a television communal reception facility where a large number of distribution lines are connected to the main line via branch lines and TV signals are distributed to a large number of subscriber homes via the above-mentioned large number of distribution lines, the branch lines are A master unit is connected, and the base unit is constituted by an alarm power source and a connection circuit that allows the power source to be connected to a branch line according to a command from a transmitter, which will be described later, and the branch line further includes: When the above power supply is connected to the branch line according to a command from the transmitter, a contact point is provided that automatically disconnects the branch line from the main line, while at each subscriber's home, the above An alarm device is activated to emit an alarm sound by being activated by a current sent from the alarm power supply through the branch line and the distribution line, and a command is sent to the connection circuit via the distribution line and the branch line. An alarm device characterized in that a transmitter is connected to the distribution line.