JPH01295557A - Interphone electric lock system - Google Patents

Abstract

PURPOSE:To form an electric lock system with simple operation and safe burglar proof by providing a timer circuit generating an unlock signal for a prescribed time through the depression of a leaving button provided near the inside of a room of a door. CONSTITUTION:With a leaving button SW2 provided near the inside of a room of a door 8 depressed in the leaving the room, a transistor(TR) TR3 of a timer circuit T receives a bias from a power supply device 13 for a time constant comprising a capacitor C1 and a resistor R1 of a time constant means and is turned on, a solenoid 14 of an electric lock EL is energized and a lock member 15 is retracted. Thus, the timer circuit T generates an unlock signal 8 for a prescribed time and the unlock state is maintained for a prescribed time. Thus, a person has only to leave the room toward outdoor. Then the TR3 is turned off after the time of the time constant elapses, then the electric lock is restored to the lock state automatically by a spring energizing the lock member 15 into the lock state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an intercom electric lock system, and particularly to an intercom electric lock system that is easy to operate, more effective in crime prevention, and safer.

C. Technical background of the invention and its problems] Conventionally, an intercom electric lock system la for locking and unlocking an entrance door as shown in FIG. 2 has been known. This intercom electric lock system 1a includes an intercom slave unit 2a provided at the entrance Ga, and an intercom base unit 3a provided indoors. This intercom handset 2a is intercom $11a 3a and line L
Connected by a. The intercom handset 2a includes a call button 7a, a microphone Ma, and a speaker SPa. The intercom base unit 3a is connected to the line La, and includes a communication circuit 10a consisting of a communication hybrid circuit, a handset (not shown), etc., a call detection circuit 11a also connected to the line La, and a communication circuit 10a from the call detection circuit 11a, which is also connected to the line La. A calling circuit 10 generates a ringing tone based on the ringing detection signal.
Power is supplied from a power supply device 13a to the 0 call circuit 10a and the ringing tone circuit 12a, which includes the ringing tone circuit 12a that outputs the output signal.

Furthermore, this intercom electric lock system la is provided with an electric lock ELa1 that unlocks the door 6a in response to an unlock signal Sa generated by pressing an unlock button SW provided on the intercom base unit 3a.

When using it, when you visit or enter the room, press the call button 7a of the intercom terminal 4m2a to call the intercom base unit 3a in the room.
The base unit 3a receives a call from the intercom slave unit 2a, its microphone M a , and the speaker S by the communication circuit 10 a.
You can talk on Pa.

Inside the room, make a call, confirm the other party, and press the unlock button SW. Relay Rya is energized, its contact rya is closed, solenoid 14a is energized, lock member 15a is retracted, and electric lock ELa is released. It is locked and you can enter.

Furthermore, when leaving the room, if there is no one in the room, the user unlocks the electric lock ELa with a thumb turn (not shown) or a key (mechanical key) and exits. Go outside and lock the door with the key. If there is someone in the room, ask someone else to press the unlock button SW and leave.

However, in the conventional electric lock system configuration, the electric lock release button is installed far away, so it is not always possible to have someone else operate it, and it is not always possible to have someone else operate it, and it is not possible to use a key etc. to mechanically unlock the lock. Doing so can lead to forgetting to lock the door, and the process of unlocking, exiting, and locking is extremely troublesome, and when a large number of people go in and out during normal times, it is often left unlocked, which is a serious problem in terms of crime prevention. be.

Furthermore, with the conventional intercom electric lock system, there are many cases where the front door is left closed and the user does not notice this. Similarly, even if the front door is closed, it may not be locked with an electric lock, and this may not be noticed, which is a serious problem in terms of crime prevention.

[Object of the Invention] The present invention has been made in view of the above-mentioned conventional problems, and it is an object of the present invention to provide an electric lock system that is easy to operate, more convenient, and safe from the viewpoint of crime prevention.

[Summary of the Invention] In order to achieve the above object, the intercom electric lock system of the present invention includes an intercom handset installed at the entrance, and an intercom handset installed indoors that receives a call from the intercom handset and communicates with the intercom handset. an electric lock that unlocks the door by an unlock signal generated by pressing an unlock button provided on the intercom base unit, an exit button provided near the indoor side of the door; and a timer circuit that generates the unlock signal for a predetermined period of time when the exit button is pressed.

Further, the intercom electric lock system of the present invention includes a switch that opens and closes in response to closing or closing of the door or unlocking or locking of the electric lock, and a control element that turns on or off when the switch is opened or closed. and ON of the control element,
It is equipped with an indicator light that is turned on and off when it is turned off.

[Embodiments of the Invention] The present invention will be described below with reference to the drawings.

In FIG. 1, the intercom electric lock system 1 of the present invention includes an intercom handset 2 provided at the entrance G and an intercom 11 3 provided indoors. This intercom device 4m2 is connected to the intercom base unit 3 in line. The intercom handset 2 includes a call button 7, a microphone M, and a speaker SP. In addition, the intercom parent W3 is connected to the line L, and includes a call circuit IO consisting of a call hybrid circuit, a handset (not shown), etc., and a call detection circuit 11 also connected to the line L.
and a ringing circuit 12 that generates a ringing tone based on the ringing detection signal from the ringing detection circuit 11 and outputting it to the telephone circuit IO. Power is supplied.

As will be detailed later, the intercom base unit 3 calls the intercom slave unit 2 by pressing the call button 7 of the intercom slave unit 2.
A call is received from the intercom handset 2 and its microswitch SP through the call circuit 10 so that a call can be made.

Furthermore, this intercom electric lock system 1 includes an electric lock EL that unlocks the door 6 by an unlock signal S generated by pressing an unlock button SW provided on the intercom base unit 3, and an electric lock EL that unlocks the door 6 on the indoor side of the door 6. An exit button SW2 provided nearby and a timer circuit T that generates the unlock signal S for a predetermined period of time when the exit button SW2 is pressed are provided.

This timer circuit T is biased from a power supply 13, and includes a holding circuit including transistors TR and TR2, a time constant means including a capacitor C1 and a resistor R1, a transistor TR3, a transistor TR4, a relay RV, and an electric current R11iW13b. * La11'lC tablet EL
It consists of a contact ry of a relay Ry for energizing.

In addition, in the intercom electric lock system l of the present invention, the lock member 1 of the electric lock EL is unlocked or locked.
The micro switch SW3 is mechanically interlocked with the micro switch SW3 to open and close the door 6, and the magnet (not shown) provided on the door 6 is activated to open and close the door 6, respectively. A reed switch SW4 is connected in series to the power supply device 13 via resistors R2 and R3.

O by closing and opening switches SW3 and SW4, respectively.
A control element TR that is turned off is provided. The control element TR is composed of a transistor, and its emitter is connected to the voltage RH1t13, and its base is connected to the switches SW3 and SW4 via a resistor R2.

A control element TR6 is provided which is opened by turning on and off the control element TR5. The control element TR6 is composed of a transistor, and the emitter and base thereof are connected to the power supply device 1.
3 are connected to a diode D through a resistor R4, and the base is connected to the collector of the control element TR through a resistor R6.

The indicator light ED, which is turned on and off by the control element TR, is connected to the control element TR via the diode D2 and resistors R6 and R7.
, and the base via a resistor R8.

When using the intercom electric lock system I configured as described above, when exiting, when the exit button SW2 provided near the indoor side of the door 6 is pressed, a bias is applied to the timer circuit T from the power supply device 13. , transistor TR, is first ONL/, then transistor T
R, constitutes the ONL/retention circuit, and exit button SW2
Even if the transistor TR2 is opened, the transistor TR2 remains ON. When the transistor TR is turned on, the transistor TR becomes the capacitor C1 of the time constant means.
, a bias is applied from the power supply device 13 during the time constant of the resistor R1, and the transistor TR4 is also turned on. When transistor TR4 is turned on, relay Ry is energized, contact ry of relay Ry is closed, and power supply device 113 is turned on.
The solenoid 14 of the electric lock EL is energized, and the locking member 15 is retracted.In this way, the unlock signal S is generated by the timer circuit T at a predetermined time, and the unlocked state is generated at a predetermined time. Therefore, it is only necessary to go outside during this time. After that, the transistor TR3 is turned off after the above-mentioned time constant has elapsed, so that the transistor TR is 0FFL/, the transistor TR2, and the transistor TR4 are 0FFL/from the power supply 13 to the solenoid 14 of the electric lock EL. Since the power supply to is cut off, the electric lock automatically returns to the locked state by a spring (!I not shown) that biases the locking member 15 to the locked state.Please note that the electric lock is locked before leaving. When
Just press the exit button SW2 again.

On the other hand, when visiting or entering a room, pressing the call button 7 of the intercom handset 2 calls the intercom base unit 3 in the room. When the intercom base unit 3 receives a call from the intercom slave unit 2, it uses the communication circuit 10 to talk to the intercom slave unit 2, its microphone M, and speaker SP, confirms the other party, and presses the unlock button SW, as described above. In the same way as when the exit button SW2 is pressed, the electric lock EL is unlocked and the user can enter the room.

In addition, in the above operation, when the electric lock EL is locked, the switch S is mechanically interlocked with the locking member 15, and when the door 6 is closed, the switch S is operated by the magnet provided on the door 6.
W3 and SW4 are each closed, and current 11 flows from the power supply device 13, and the control element TR6 is turned on.
The gate element TR is turned off. When the unlock button SW is pressed as described above, the electric lock EL operates and the microswitch SW3 is closed. Since the current l is cut off, the control element TR5 is turned off, a current i2 flows from the power supply device 13, the gate element TR is turned on, and the indicator light LED is turned on.

The operation when the door 6 is closed and the switch SWA is closed is the same as when the microswitch SW3 is closed. In this case, even if the timer circuit T times out after the aforementioned time constant has elapsed and the microswitch SW3 closes, the indicator light LED continues to light up because the switch SW4 remains closed.

In this way, if the front door is left closed, or if the front door is closed but not locked with the electric lock, the indicator light LED will light up to lock the door. Or you can close the door.

In addition, in the above embodiment, the unlocked state is maintained for a certain period of time,
Thereafter, power to the electric lock EL is automatically cut off and the electric lock is locked, but such locking may be performed after a microswitch or the like detects that the door 6 is closed.

Further, in the above embodiment, the unlocked state is maintained for a certain period of time even when the unlock button SW1 is pressed, but the unlock button SW,
The unlocked state may be obtained only while the button is pressed.

[Effects of the Invention] As is clear from the above embodiments, according to the intercom electric lock system of the present invention, there is no need to mechanically unlock the door from the inside when exiting, and exiting can be done with a simple operation. Moreover, since the electric lock is always locked after a predetermined period of time since it is not mechanically unlocked, it is effective and safe in terms of crime prevention.

In addition, if the front door is left closed, or if the front door is closed but not locked with the electric lock, the indicator light LED will light up.
This is a big advantage in terms of crime prevention because you can lock and close the door by noticing this.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an intercom electric lock system according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a conventional intercom electric lock system. 1... Intercom electric lock system 2...
...Intercom handset 3...Intercom base unit SWl...Unlock button SW2...Exit button 6...Door 7...Call Button 10...Telephone circuit 11...Call detection circuit 12...Ring tone circuit 13...Power supply M...Microphone SP... ... Speaker T ... Timer circuit EL ... Electric lock S ... Unlock signal G ... Entrance SW3, SW4 ... Switch TR,, TR, ... Control element LED ... Indicator light

Claims (1)

[Scope of Claims] 1. An intercom handset installed at the entrance, and an intercom base installed indoors that can receive a call from the intercom handset and talk to the intercom handset;
an electric lock that unlocks the door by an unlocking signal generated by pressing an unlocking button provided on the intercom base unit; an exit button provided near the indoor side of the door; and an exit button provided by pressing the exit button. An intercom electric lock system comprising a timer circuit that generates the unlocking signal for a predetermined period of time. 2. Opening or closing the door or unlocking the electric lock;
A claim characterized in that it is provided with a switch that opens and closes in response to locking, a control element that turns on and off when the switch is opened and closed, and an indicator light that turns on and off when the control element turns on and off. The intercom electric lock system according to item 1.