JPS61246482A - Electromechanical type operation apparatus controlled by cord - Google Patents

Abstract

1. An electromechanical device for manipulating a code-controlled door or access comprising a control unit arranged in the vicinity of the lock of said door or access and having a code input interface comprising a keyboard or the like (1), said interface (1, 2) being connected to a comparator (3) which also receives the normal code recorded in electronic form in a memory (4), said comparator controlling an electrical actuator (6) when the code entered by the user on the keyboard (1) is the same as the normal code recorded in the memory (4), and a remotely situated monitoring unit, the control unit also comprising an alarm circuit (7, 12-15) which is sensitive to the actuation of a coercive code generating an alarm for coding under coercive which is transmitted to the monitoring unit, characterised in that said coercive code is a short code entered after the normal code and in that said alarm circuit is actuated for a short period by entering the normal code.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to an electromechanical actuating device, such as an electric catch, in which a motor is controlled by a cord to open a spout, but the invention may only be used by authorized persons. Applies to all devices whose access is controlled by entering a known code. In particular, the present invention is applicable to a device that approaches a bank deposit dispenser or the like.

BACKGROUND OF THE INVENTIONSuch devices generally consist of a code having a key portion or the like connected to a comparator placed in the vicinity of the device whose access is to be controlled and to which an operational code stored electronically in a memory is separately supplied. It consists of a control unit comprising an input interface, said comparator operating the electric operating device when the code entered by the user into the key unit matches the operating code stored in the memory.

A monitoring unit is also provided which is located remotely from the controlled device and which supervises and/or controls the door from a distance.

Means for Solving Problems Typically such devices will issue an alarm, for example in the event of an attempt to malfunction the door or an attempt to open the door with a false code. However, if an authorized user enters the code under duress or coercion, it is impossible to alert the monitoring unit because the prohibited lock operation will not take place.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electromechanical operating device of the type described above, which is capable of informing a monitoring unit that a user has forcedly entered a code.

The device according to the invention comprises a circuit in which the control unit is enabled for a predetermined period of time after the detection of a correct code by a comparator and generates an alarm for the forced code input supplied to the monitoring unit in response to a predetermined code of at least one element. It is characterized by

Therefore, in order for the control unit to secretly send an alert of forced code entry to the monitoring unit, the user only has to enter the elements of the above-mentioned supplementary code in the correct code-input machine within the above-mentioned predetermined period. . This gives a warning and allows necessary measures to be taken.

According to one embodiment of the invention, the control unit comprises a standby circuit which is activated by a comparator if the entered code is correct, the standby signal being a signal representing a key input or an element of a supplementary predetermined code. It is sent to an AND logic circuit which is applied separately.

Advantageously, the control unit comprises a memory which stores the alarm signal of the code due to the F-force and which is reset to zero by the monitoring unit.

During the predetermined period determined by the waiting circuit for the user to enter the supplementary code element, the user must enter the code element in the normal manner at the same speed as the correct code element. Therefore, it needs to be relatively short. Such a wait may be set to a few seconds, for example.

EMBODIMENT OF THE INVENTION The electric locking key schematically shown in the drawings is controlled by a code input into a key unit 1 which together with a code device 2 constitutes an input interface. The obtained code is stored in memory 4
The release code already stored therein is sent to a separately supplied comparator 3.

When the two codes, the code entered into the key part 1 and the release code stored in the memory 4, match, the comparator 3 causes the release control circuit 5 to send an release signal to the electric catch 6. I will force you to do so.

According to the present invention, a forced input alarm signal is generated by operating one or more predetermined keys on the key unit 1 within a predetermined period after sending the correct code input machine release signal. . This is carried out by an AND logic circuit 7 to which a signal representing the above-mentioned supplementary key press from the key unit 1 and a standby signal supplied by a standby circuit 8 in response to a command signal for opening the electric catch 6 are applied. The output of the AND circuit 7 is a forced input alarm signal which is preferably stored in the memory 9 and secretly supplied via line 11 to the monitoring unit. Input of supplementary code elements by electronic circuitry will not generate an alarm unless input occurs within a limited period of time after input of the correct code. Thus, in particular, elements of the supplementary code may be elements used in the open code.

The standby of the standby circuit 8 is set to a relatively small value, just enough for the user to press the key in a normal manner without being noticed by the person forcing the door to open. This waiting time is, for example, about several seconds.

FIG. 2 shows one implementation of circuits 7 and 9 of FIG. The supplementary key consists of a contact 12 which shorts out a capacitor 13 which is supplied with a positive voltage via a resistor 14 and whose other terminal is grounded. AND circuit is actually NOR circuit 1
5, the NOR circuit 15 has a capacitor 13 on the one hand.
On the other hand, the standby signal from the standby circuit 8 inverted by the inverter gate 16 is applied. The signal supplied from the capacitor 13 is normally at a high level, but when the key 12 is operated, it becomes a low level, and the signal supplied from the capacitor 13 is complementary to the information supplied to the AND circuit in FIG. 1, so it is a NOR circuit. 15 is equivalent to AND circuit 7.

A circuit for storing the signal of the forced input provided by the NOR gate 15 is connected in series and connected by a resistor 20 to the base of the transistor 19 such that the output of one gate is connected to one input of the other gate. two no's
It consists of R gates 17 and 18. The above transistor 19
is connected between the positive power supply and ground via the resistor 21,
The stored alarm signal is sent out from the collector via line 11.

If the key 12 is operated during the duration of the standby signal by the circuit 8, the input of the gate 15 switches to a low level, so that the output of the gate 17 reverses to a low level. gate 1
This state of 7 is maintained by gate 18. Since transistor 19 is conductive, a high level signal is obtained on line 11 to warn of forced input. Line 22 from the monitoring unit inverts the state of the gate storing the alarm signal to suppress the alarm signal.

The above description is merely a typical example and is not restrictive in any way, and changes or modifications can be made without departing from the scope of the invention.

In particular, some elements can be replaced by other elements having a similar function. For example, memory can be replaced with block circuits or flip-flops.

Although the present invention has been described as being applied to an electric latching lock, it is of course applicable to any device in which access is controlled by an electromechanical operating device controlled by a cord.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an electric clasp lock according to the present invention, and FIG. 2 is a diagram showing one embodiment of a circuit for detecting forced input and a circuit for storing an alarm signal of forced input. DESCRIPTION OF SYMBOLS 1... Key part, 2... Code device, 3... Comparator, 4°9... Memory, 5... Open 11111 circuit,
6... Electric stopper, 7... AND circuit, 8...
Standby circuit, 11.22...Line, 1,2...Contact, 13...Capacitor, 14゜20.21...Resistor, 15.17.18...NOR circuit, 16... Inverter gate, 19...transistor. Patent Applicant

Claims (5)

[Claims] (1) Comparator (3) located near the lock and separately supplied with an operating code stored electronically in memory (4)
The comparator is connected to a code input interface (1, 2) having a key part etc. (1), and the comparator is configured to convert the code inputted into the key part (1) by the user into an operation code stored in the memory (4). a control unit that operates the electric operating device (6) when the operation code coincides with the operating code; and a monitoring unit that is arranged at a distance from the control unit. A circuit (7,
12-15), the elements of the predetermined code are obtained by pressing the key part (1) used for inputting the operation code, and the code is controlled by the forced code. An electromechanical operating device controlled by a code, characterized in that the alarm is valid only for a short period following input of the operating code. (2) The control unit consists of a standby circuit (8) which is enabled by a comparator (3) when the key pressed code is correct, and the standby signal is used to detect input to the key part or an element of a supplementary predetermined code. 2. Electromechanical operating device according to claim 1, characterized in that the representing signal is supplied to a separately supplied AND logic circuit (7, 15). (3) The control unit comprises a memory (9) for storing the alarm signal of the forced code and being reset to zero by the monitoring unit.
The electromechanical operating device according to item 1 or 2. (4) Claims 1 to 3, characterized in that the standby circuit (8) is adjusted to a short duration of about several seconds.
Electromechanical operating device according to any one of paragraphs. (5) The memory (9) comprises two NOR logic gates (1) connected in series such that the output of one NOR gate (18) is connected to one input of the other NOR gate (17).
7, 18). The electromechanical operating device according to claim 3, characterized in that it consists of: