JPS62172849A - Security system - Google Patents

Abstract

PURPOSE:To grasp an indoor state from the outdoors, to cope quickly with an emergency condition, and to improve an effect of safety by providing a controlling circuit which can execute a response to the inside of a house even in the course of an alarm notice of a door-phone which has been placed in the outside of the house. CONSTITUTION:A master device 1 and plural pieces of slave devices 2 are placed in the inside of a house of a home telephone system, a door-phone 3 is connected to the master device 1, and also, a security unit 4 is connected to a call line l1 between the master device 1 and the slave device 2. A security system for monitoring a fire, etc., in the inside of a house is constituted by connecting a sensor S for sensing an abnormal state, to said unit 4. To a line l2 for connecting a call network 6 of this door-phone 3 and the master device 1, a bidirectional call interface circuit 5 is connected, and an alarm sound from the unit 4 is applied to the circuit 5 from the line l1. The circuit 5 is used as a controlling circuit between the door-hone 3 and the inside of the house, so that a state of the inside of the house can be answered even when an alarm is being noticed from the door-phone 3, and this system copes quickly with an emergency condition.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field 1 The present invention relates to a security system that issues an alarm from outside using a doorbell.

l Background technology 1 Conventionally, this Yuzu security system monitors abnormal conditions such as fire inside the house, and when an abnormality occurs, 11 people are sent to the house. In addition to issuing warnings, alarms are also sent via doorbells placed outside residences. Therefore, if you come during this warning,
The telephone line is fixed in such a way that an alarm signal is forcibly sent from the main unit in the house to the doorbell. Therefore, even if a person outside hears this alarm and tries to contact someone inside the house by pressing the button on the doorbell, the ringing sound produced by pressing the button on the doorbell will not reach inside the house. Therefore, there was a problem in that it was impossible to communicate between the outdoors and the indoors, and there was no way to grasp the indoor situation other than entering the indoors.

[Objective of the Invention 1 The present invention has been made in view of the above-mentioned points, and its purpose is to provide a security system in which the ringing sound from the doorbell can be heard indoors even when the vIIta is not available. be.

[Disclosure of the Invention I ('112 Example) Figures 1 to 3 are diagrams showing an example of the present invention,
FIG. 2 shows the overall configuration of the security system of this embodiment. The security system of this embodiment is one in which a home telephone device including a door phone 3 is provided with a security function for detecting fire and the like. The home telephone device has a sharp device 1 and a plurality of slave devices 2 installed indoors, and a doorbell 3 installed outdoors, and a security unit 4 equipped with multiple sensors S for detecting fire, etc. Connected to device 1.

The operation of this security system when an abnormality occurs will be explained. When sensor S detects an abnormality, this sensor S
The output is sent to the security unit 4, and the security unit 4 determines what kind of abnormal state it is. Then, this security unit 4 emits an alarm sound (for example, a voice synthesized sound such as "It's a fire!"), and also sends a sharp alarm to the sharps device 1 via the line 0.1. A request signal for securing a communication line for emitting an alarm sound with the device 1 and the slave device 2 is transmitted via the control signal line. The sharp instrument 1 that has received this request signal connects the alarm communication line that connects the sharp instrument 1 to the child device 2 and the security unit 4. Then, the sharp instrument 1 transmits a data signal to the security unit 4 to permit use of the communication line. At this time, an alarm sound by the security unit 4 will be notified from the child device 2. Similarly, the same operation is performed for the doorbell 3 via the sharp device 1, and the doorphone 3 and the security unit 4 are connected via the line 0.2, and the doorphone 3 also emits an alarm sound. An alarm will also be sounded outside.

Although the above is a description of the same structure in the conventional example, the feature of the present embodiment for dogs will be explained with reference to FIG. FIG. 1 is a diagram showing an interface as a control circuit between the sharp instrument 1 and the door phone 3.
A communication interface circuit 5 composed of a bidirectional amplifier and the like is connected to a communication line L1 which is connected to the slave unit 2 through a communication line L1 and from which an alarm sound from the security unit 4 is transmitted. A contact point r is provided, through which an alarm sound from the security unit 4 is sent to the door phone 3, and which is controlled to open and close when a call is made between the door phone 3 and the sharp instrument 1. This call interface 5 is (
It is connected to the telephone communication network 6 of the door phone 3 via the lance T. Furthermore, line 0 connecting transformer T and doorbell 3
, 2 are connected to the sharps 1 to a call detection line L through which the sharps 1 detects that the push button SW of the door phone 3 has been pressed. Further, when a call is made from the door phone 3 to the sharp device 1, a call current supply circuit 7 is provided which supplies current to the line α2 to enable a call from the door phone 3 to the sharp device 1. are connected to the times ma and t via contacts '2'.

The operation will be explained below. First, in the explanation of the operation of the circuit shown in FIG. 2 above, the operation when an abnormality occurs will be explained in the diagram t51. In response to a request signal from the security unit 4 requesting the communication line L1 with the sharp instrument 1 when an abnormal state occurs, the sharp instrument 1 connects to contact r1.
By opening the telephone line L, the telephone line L is connected to the telephone interface circuit 5. At this time, contact r2 is connected so that the current from the call current supply circuit 7 is not supplied to line η2
is open, the call line L connected to the security unit 4 is in a state in which signals can only be sent in one direction from the security unit F4 to the doorbell 3. In other words, the alarm sound from the security unit 4 is not transmitted to the doorbell. The sound is emitted through the speaker SP.

Suppose that a person outdoors hears the alarm sound from the doorbell 3 and presses the push button SW as shown in FIG. 3(b) to hear the situation indoors. At this time, the sharp instrument 1 detects the forgery of the push button SW via the call detection line L, and the communication line L between the security unit 4 and the sharp instrument 1 is released at a contact point (not shown). Eggplant), Konoto! The communication line between the master device 1 and the slave device 2 remains secured. At the same time, by opening the contact r2, the communication current supply circuit 7 supplies current for communication to the line #lα2.

For this reason, the ringing sound (for example, 1 ping" sound) caused by pressing the push button SW of the doorbell 3 is as shown in FIG. 3(a).
As shown in FIG. When the sharp instrument 1 detects that the push button SW is released from the pressed state via the call detection line L, the contact ``2'' is closed again and the security unit 4 returns to the alarm sound sending state. Then, when a person indoors who hears the ringing picks up the handset of the sharp device 1 or the slave device 2, the above-mentioned push button SW of the door phone 3 is pressed, that is, the contact point r2, as shown in FIG. is controlled by sharps device 1 in a closed state, doorbell 3 and sharps device 1
Alternatively, it is possible to communicate with the slave device 2. As described above, according to the present embodiment, even when the security unit 4 is notifying the alarm sound, the push button S of the doorbell 3 can be pressed.
When W is pressed, the call line L1 between the security 4 and the sharps device 1 is opened, and the call line L1 between the doorbell 3 and the sharps device 1 can be secured, so that the sharps device 1 or the slave device 2 can be connected.
By picking up the handset, you can talk between people outdoors and people indoors, which improves safety effects such as being able to quickly deal with people outdoors in an emergency situation.

[Effects of the Invention 1] As mentioned above, the present invention provides a security system that monitors abnormal conditions such as fire in a house, and in the event of an abnormality, not only issues an alarm inside the house but also issues an alarm via a doorbell placed outside the house. , is equipped with a control circuit that allows calls to be made from inside the house even when the doorbell is issuing an alarm, so if an alarm is issued from the doorphone as in the past, the island will not be able to receive calls or calls from the doorphone indoors. This will reduce the number of cases where the situation inside the building cannot be known without entering the building, and it will be possible to grasp the situation inside the building from outside, allowing for quick preparation of an emergency situation. , the safety effect is improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a main part of a sandwich circuit according to an embodiment of the present invention, FIG. 2 is a circuit diagram showing the overall structure of the same, and FIG. 3 is an explanatory diagram of the operation of the same. -1 is a sharp instrument, 2 is a child instrument,
3 is a doorbell, and 4 is a security unit.

Claims (1)

[Claims] (1) In a security system that monitors abnormal conditions such as fire in the house, and in the event of an abnormality, not only issues an alarm inside the house but also issues an alarm via a doorbell placed outside the house, even if the alarm is being issued by the doorphone, A security system characterized by comprising a control circuit that enables response to internal communications.