JPS6347110Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an intercom device with an unlocking function.
In particular, the present invention relates to an intercom device with an unlocking function that improves the operability of unlocking a handset in the dark.

In general, there are various types of intercom devices, and among them, the handset is equipped with various operation switches, and has an unlocking function that can be linked to an electric lock and unlocked from the master unit and handset via the controller. There is an intercom device.

For example, this intercom device with unlocking function can be used in banks, etc., and the handset can be installed at the entrance and linked with an electric lock, or the handset can be equipped with a numeric keypad switch and can be unlocked using a PIN code, etc., to perform a traffic check. It is something.

However, slave units having various operation switches such as ten key switches do not have built-in lighting to illuminate the operation switches, and therefore have the disadvantage that it is difficult to operate the switches in darkness such as at night.

The present invention was developed in view of the above-mentioned difficulties with the conventional methods, and uses a minimum number of wires to generate a signal for unlocking the door at the controller, or a signal for turning on the lighting lamp that illuminates the control switch section of the handset. An object of the present invention is to provide an intercom device with an unlocking function that improves operability for unlocking in the dark by illuminating an operation switch part when desired by determining whether or not the door is open and then lighting and unlocking the door. shall be.

In order to achieve such an object, the present invention includes a numeric keypad switch for inputting a signal for unlocking the lock into the handset, and a lighting installed near the numeric keypad switch for illuminating the numeric keypad switch. and an encoder for encoding the signal sent from the numeric keypad switch, and detecting whether the unlocking signal from the encoder matches a preset signal. a coincidence detection circuit; an unlocking output circuit for unlocking the lock based on a coincidence signal from the coincidence detection circuit; and an illumination signal for determining whether the output from the encoder is a signal for lighting the illumination lamp. An intercom device with an unlocking function is provided, which includes a discrimination circuit and an illumination signal output circuit that turns on the illumination lamp for a predetermined period of time based on the output of the illumination signal discrimination circuit.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of an intercom device with an unlocking function according to the present invention.

In FIG. 1, the intercom device with an unlocking function of the present invention is constituted by an electric lock connected to a master unit and a slave unit via a controller. That is, the handset is installed at the entrance or side door, and an electric lock is installed at the entrance.

The base unit is provided with a remote unlock switch 10 for direct unlocking. The handset has a numeric key switch 20 for inputting an unlock signal (the arrangement of numbers is the same as a normal push-button telephone),
An illumination light 21 is provided in the vicinity of the ten-key switch 20 to illuminate it, an indicator light 22 for confirming unlocking, and a buzzer 23 for making a touch sound or a warning for the ten-key switch 20.

The numeric keypad switch 20 of the slave device is connected to the encoder 30 of the controller. encoder 30
From there, a coincidence detection circuit 31, a coincidence signal counter 3
2 to the unlock output circuit 33, and also to the alarm output circuit 35 via the miss signal counter 34, and from the alarm output circuit 35 to the touch sound/alarm sound output circuit 36, and The match signal counter 32 is connected to a miss signal counter 34 as a reset circuit (dotted line).

Further, the encoder 30 is connected to a lighting signal discrimination circuit 37, and the lighting signal discrimination circuit 37 is connected to an unlock output circuit 33, a touch sound/alarm sound output circuit 36
It is also connected to the illumination signal output circuit 38, and is further connected to the encoder 3 as a reset circuit.
0, connected to the coincidence signal counter 32 (dotted line).

Note that the encoder 30 is directly connected to the touch sound/alarm sound output circuit 36. The remote unlocking switch 10 of the master unit is connected to the unlocking output circuit 33 via the remote circuit 39 of the controller. Furthermore, the controller is provided with a door opening detection circuit 39' for unlocking the electric lock.

The unlock output circuit 33 of the controller is connected to the solenoid 40 of the electric lock, and the trigger switch 4 is connected to the solenoid 40 of the electric lock.
1 is connected to an open door detection circuit 39'. Also,
The unlock signal switch 42 is directly connected to the indicator light 22 of the slave unit.

The alarm output circuit 35 of the controller is an external buzzer 50
The open door detection circuit 39' is also connected to an external relay box 51.

In the intercom device with an unlocking function configured as described above, in order to unlock the electric lock not from the main unit but from the outside, that is, from the slave unit, it is necessary to key in the unlocking password from the numeric key switch 20. It is done by folding. That is, a signal for unlocking using a password is input to the encoder 30 of the controller, where this signal is encoded. The encoded signal is compared with a preset password in a match detection circuit 31, and the number of matches is counted in a match signal counter 32. When a predetermined number of times has been counted, the coded signal is output to an unlock output circuit 33.
At the same time, a signal is sent to the miss signal counter 34.
Reset. On the other hand, when the last signal indicating that it is an unlock signal, here the # button, is keyed in, this is discriminated by the illumination discrimination circuit 37,
A signal is sent to the unlock output circuit 33. Based on these signals, the unlocking output circuit 33 operates the solenoid 40 of the electric lock to unlock the electric lock for a predetermined period of time. Further, when the # button is keyed in, the encoder 30 and the coincidence signal counter 32 are reset to prepare for the next unlocking operation. At this time, the unlocking signal switch 42 of the electric lock is turned on and the indicator light 22 of the slave unit lights up to confirm the unlocking. In addition, if the password is entered incorrectly into the encoder 30, the user can simply key in the code again, but if the incorrect password is entered four times, the error signal counter 34 counts the number of times, and activates the alarm output circuit 35. The buzzer 50 is sounded, and the buzzer 23 of the slave device is sounded via the touch sound/alarm sound output circuit 36 to issue a warning. Here, the miss signal counter 34
is reset when the coincidence signal counter 32 outputs an unlock signal to the unlock output circuit 33.

In case of darkness, such as at night, use the numeric key switch 20.
When one of the switches, in this case the 〓 button, is pressed first, the illumination signal discrimination circuit 37 determines that it is a illumination signal via the encoder 30 of the controller. Then, the illumination light 21 of the slave device is turned on for a predetermined period of time via the illumination signal output circuit 38 to illuminate the numeric keypad switch 20 to facilitate key-in of the password for unlocking. Ten key switch 20
The reason why I chose the 〓 button is because the 〓 button is located in the lower left position, making it easy to find it even in the dark. Furthermore, the signal for turning on the illumination light 21 is obtained from a micro switch or the like that operates in conjunction with the opening and closing of the door that houses the numeric key switch 21, without depending on the 〓 button of the numeric key switch 20, and is input to the encoder of the controller. You can also do this by letting them.

FIG. 2 is an example of the main circuit for unlocking in the controller of FIG. 1.

In FIG. 2, the numeric keypad switch 20 is connected to an encoder 30, and its output terminals D ₁ -D ₄ are connected to one input terminal of exclusive logic circuits 105 - 108 via inverter circuits 101 - 104, respectively. Ru. Further, a strobe terminal of the encoder 30 is connected to a shift register 109 that constitutes a part of the encoder. The output terminal of the shift register 109 is connected to the other input terminal of the exclusive logic circuits 105 to 108 through four diode switches 110 to 113 as four digits, and is also connected to the power supply V through a resistor R. Ru. The outputs of exclusive logic circuits 105 to 108 are respectively connected to input terminals of a 4-input AND circuit 115,
The output of the AND circuit 115 is the 2-input AND circuit 116
is connected to one input terminal of the AND circuit 11
The other input terminal of encoder 6 is connected to the strobe terminal of encoder 30, and its output is connected to coincidence signal counter 32. This diode switch 11
0 to 113, exclusive logic circuits 105 to 108, and
A match detection circuit 31 is configured by AND circuits 115 and 116. 2 inputs from coincidence signal counter 32
connected to one input terminal of the AND circuit 117,
Its output is connected to the solenoid 40 of the electric lock via a timer 118 and a transistor 119, which are unlocking output circuits. On the other hand, the encoder 30
A 3-input AND circuit 120 is connected to the D ₁ , D ₂ , and D ₄ terminals.
are connected to the inputs of the AND circuit 1, and this output is connected to the AND circuit 1
17 is connected to the other input terminal. The AND circuits 117 and 120 constitute a part of the illumination signal discrimination circuit 37.

Now, if the password/setting numbers are 1, 2, 3, and 4, the diode switches 110 to 113 are set in sequence (black diodes). In the standby state, each exclusive logic circuit 105 to 108
Both inputs are “H” and the output is also “H”.
The output of the AND circuit 115 becomes "H", but since the strobe signal of the encoder 30 is "L"
The AND circuit 116 is not output and the lock is not unlocked.
So, I turned the numeric key switch 20 to 1, 2, 3, 4.
When are pressed sequentially, the strobe signal of the encoder 30 and D ₁ to D ₄ are sequentially output (“H”), and
The shift register 109 also sequentially outputs the strobe signal, and the diode switches 110 to 113 sequentially change from "H" to "L". Therefore, exclusive logic circuits 105 to 108, AND circuit 115,
The output ("H") signals of 116 are sequentially input to the coincidence signal counter 32, and if all the signals match, the coincidence signal counter 32 counts 4 and outputs ("H"). Furthermore, when the # button is pressed on the numeric keypad switch 20 for unlocking (code
1101), the outputs of AND circuits 120 and 117 are “H”
Then, the timer 118 is turned on (for about 5 seconds) and the solenoid 40 of the electric lock is operated to unlock it.

Next, FIG. 3 shows an example of a circuit of a controller for lighting the illumination light of the slave unit shown in FIG. 1.

In _FIG . 3, two inputs AND
It is connected to one input terminal of circuit 205. Also, from the D ₂ and D ₄ terminals of the encoder 30, 2
It is connected to an input terminal of an input AND circuit 204, and its output is connected to the other input terminal of the AND circuit 205. The output of the two-input AND circuit 205 is connected to the input terminal of a timer 203, which is a lighting signal output circuit. These AND circuits 204, 205,
The inverter circuit 201 constitutes a part of the illumination signal discrimination circuit. Further, the output of the timer 203 is connected to the illumination lamp 21 of the slave unit via a transistor 206.

Now, if the 〓 button of the numeric keypad switch 20 is not pressed, the inverter circuit 201 and
The outputs of the AND circuits 204 and 205 are both "L", the timer 203 does not operate, and therefore the illumination light 21 of the slave unit does not light up. Ten key switch 2
When the 0 button is pressed (code 0101), D ₁ of the encoder 30 becomes “L”, D ₂ and D ₄ both become “H”, and the inverter circuit 201 and AND circuit 20
Both outputs of 4 and 205 become “H” and timer 20
3 (for about 5 seconds). Therefore, by lighting the illumination light 21 of the handset and illuminating the ten key switch 20, keys can be easily operated even in the dark.

As is clear from the above embodiments, according to the present invention, whether the signal is a signal for unlocking in the controller or a signal for turning on the illumination light that illuminates the operation switch section of the slave unit. The number of wires needed to illuminate the operation switch can be minimized by lighting and unlocking the operation switch, and the operation switch can be illuminated when desired, making it easier to unlock the door in the dark. can be improved.

[Brief explanation of the drawing]

Fig. 1 is a basic block diagram of the intercom device with unlocking function according to the present invention, Fig. 2 is a circuit diagram for unlocking in Fig. 1, and Fig. 3 is a circuit diagram for lighting the illumination lamp in Fig. 1. It is. ...Main device, ...Slave device, ...Controller, ...
...Electric lock, 20...Numeric key switch, 21...
Illumination lamp, 30... Encoder, 31... Coincidence detection circuit, 33... Unlocking output circuit, 37... Lighting signal discrimination circuit, 38... Lighting signal output circuit.

Claims (1)

[Scope of utility model registration request] In an intercom device with an unlocking function that can be unlocked via a controller from a slave unit in which a master unit and various operation switches are housed, a numeric key switch is provided that inputs a signal for unlocking to the slave unit. , an illumination lamp installed near the numeric keypad switch for illuminating the numeric keypad switch, and an encoder for encoding a signal sent from the numeric keypad switch in the controller, and an unlocking light from the encoder. a coincidence detection circuit that detects whether a signal for the illumination matches a preset signal; an unlocking output circuit that unlocks the lock based on the coincidence signal of the coincidence detection circuit; A solution characterized by providing a lighting signal discriminating circuit for discriminating whether the signal is for lighting a lamp or not, and a lighting signal output circuit for lighting the illumination lamp for a predetermined period of time based on the output of the illumination signal discriminating circuit. Intercom device with lock function.