DE2847297A1 - Locally or remotely operable electronic lock - has keyboard for entered code and flip=flop and counter controlling opening decision - Google Patents

Abstract

The electronic lock can be operated locally or remotely and has an input keyboard acting as a key into which given codes are entered. The keyboard unit's output is connected via code switches to logic. The outputs of the logic are connected to a flip-flop and only set the flip-flop when the data entered is incorrect. If the entered data is correct the logic moves a counter on. The counter determines the correctness of the sequence and is reset after receiving the last pulse from the logic. For the lock to open, two conditions must be met. First, the counter must have been reset, e.g. to zero. Secondly the flip-flop must not have been set. The lock is simple, cheap and effective.

Description

Electronic lock

The invention relates to an operable by local and remote control electronic lock.

There are known electronic locks with memories or shift registers work and therefore require a great deal of technical effort.

The invention has therefore set itself the task of using close or / and remote controlled electronic locks to create the greatest possible Offer a degree of security and yet with simple and inexpensive means can be produced.

According to the invention, this object is achieved in the case of one described at the outset Lock released in that one of the input unit of the unlocking part (key) outgoing input information and a delayed pulse decision elements for control the unlocking of the lock and with correct value and position Release input information, whereby the correctness of the step sequence of the input information mation checks a counter responsible for the progressive unlocking, which is controlled by the pulse from the input unit.

According to the further feature of the invention, this is an unlocking unit (Key) from input unit, code switch, decision elements, optionally one Flip-flop element, counter and delay element owning castle consequently contains an advantageously simple system, the specialty of which is an impulse that occurs after the input information has been received. Be with this impulse the associated decision-making members are released. If the entry is correct, then the counter responsible for the correct release of the decision-making members is continued by an impulse.

With this system, electronic locks can be used with any Realize many important values without great technical effort.

The security of the system is achieved by the wrong Input information both according to the absolute value and according to the sequence of steps or sequence or position of the counters by an output pulse of the respectively controlled Decision member is reset to the basic position and thereby the unlocking process of the lock breaks off.

In a special version, the electronic lock can through the basic conditions be marked that the counter is set to the basic position, for example zero, set and the flip-flop element is not set.

After entering an unlocking information to the Parallel outputs of the input unit via the respective associated output function assigned code switches are present on the decision-making elements and the counter always only release the correct decision-making element, whereby the counter is in terms of value correct input information at the decision member through the end edge of the pulse can be continued. With regard to the absolute value and / or the sequence of steps incorrectly selected input information, however, the counter jumps starting from one Impulse of the decision element back to the basic position via the flip-flop element. The last decision element then provides an impulse for unlocking the electronic lock and at the same time leads the counter to the basic position return.

In continuation of the features of the invention, this can be caused by incorrect input information set flip-flop element by an external delete key or a switch in the Basic condition must be reset.

Furthermore, a delay element can be the end edge of the individual pulse to release the lock to the meter with a delay. This prevents that two decision elements are activated at the same time.

The invention is based on a function sequence shown schematically it depicted. 1 shows a block diagram. FIG. 2 shows a pulse diagram The electronic lock, which can be operated by local and / or remote control, consists of the lock itself and the so-called unlocking device or the key. Both units are essentially composed of the input unit 1 (key) with parallel outputs and a delayed single pulse, the code switches 2, the associated decision elements 3, the flip-flop element 4, the counter 5 and the delay element 6. The input unit 1 consists of a keypad, For example, an infrared remote control transmitter with a set of M parallel outputs is controlled. Shortly after concern of the digital function, which received so long remains how the key is pressed, the input unit delivers a one-time Pulse. The code switches 2 set the required output function of the parallel outputs of the input unit to the assigned decision elements 3.

In decision member 3 it is checked whether the respective pending Input information is correct in terms of value. If the input information was correct in terms of value, then via the end edge of the pulse of the counter is moved one digit further. The flip-flop link 4 is only set if the pending information is on the decision-making member 3 is wrong. The counter 5 determines the correctness of the sequence of steps and is after reset to the initial position after the last counting pulse. The delay element Finally, 6 is used to delay the individual pulse in front of counter 5.

To now the electronically locked, equipped with a flip-flop element 4 To be able to open the lock, two basic conditions must first be met. It the counter 5 must be on the basic position (for example liull) and the flip-flop element 4 must not be set.

Only when these basic conditions are met, which in turn only then is the case, if no incorrect information has been carried out, the unlocking process can proceed according to the following system: After entering the first input information via the keypad of the input unit 1 is connected to the corresponding parallel outputs Output function. This output function is available after passing through the code switch 2 also to all decision-making members 3 at the same time.

However, since the counter 5 is only the first decision element in the sequence 3 releases, the test for the correctness of the value of the output function takes place only in this first decision-making element 3 and only during the duration of the delivery of the Single pulse from input unit 1 instead. If the output function was wrong, what both in terms of value and according to the step or the sequence or position can be, an output pulse from the decision element 3 turns the flip-flop element 4 is set and thereby keeps the counter 5 on the Basic position. At the same time, the entire electronic lock will be inoperative for this period set until the flip-flop element 4 is reset again, which is done by an external Delete button 7 or a switch takes place. If the flip-flop element 4 and is omitted If incorrect information is entered, the unlocking process is also interrupted. by the counter 5 by the output pulse of the decision element on the ground position is reset and in each case forces that the unlocking from the front, i.e. with the first digit, begins again. On the other hand, if the first output function was correct, so the counter 5 is switched on a number sequence with the end edge of the single pulse. This end edge is delayed given to the counter 5 to prevent two Decision members are activated at the same time.

After the first function has elapsed, input unit 1 the second input information is entered. The entire circuit behaves in this way as described above for the first pulse. Only the meter reading has changed increases one value, and thus the counter 5 now gives the second in the correct sequence Decision member 3 free.

The unlocking process continues to the last position or it is interrupted if any wrong entry is made. At the last entry however, the last decision element unlocks with correct information about an impulse the lock.

In addition, the counter 5 is set back to the basic position, so that the entire unlocking process can be repeated for a new opening of the lock can begin.

The functional sequence is also illustrated by the diagram in Fig. 2 can be seen. In the timing diagram there is a lock with three digits and one Flip-flop element shown. The unlocking process is complete here correct input information about O-I-II played through. At the second time Unlocking process is deliberately entered incorrect information after O-I, see above that by the set flip-flop element a blocking occurs and the system opens the basic position 0 jumps back. The lock remains locked.

The threefold system is particularly suitable for opening Garage doors by an infrared or ultrasonic remote control.

i) arüberhinuus the electronic lock is preferred for All hard safes, optionally also with remote control, can be used. Likewise in this way restricted areas can be closed.

All shown in the figures and explained in the description Details are important to the invention.

Claims (5)

Electronic lock patent claims oil By local or remote control Operable electronic lock, noting that an input information emanating from the input unit (1) of the unlocking part and a delayed impulse decision element (3) for unlocking the lock control and release when input information is correct in terms of value and position, the correctness of the step sequence of the input information for the progressive one Unlocking the responsible counter (5) checked by the pulse from the input unit (1) is controlled from. 2. Electronic lock according to claim 1, g e k e n n z e i c h -n e t by an unlocking device, which is essentially an input unit (1), code switch (2), decision elements (3), optionally a flip-flop element (4), a counter (5) and a delay element (6). 3. Electronic lock according to claims 1 and 2, g e k e n nz e i c h n e t by the basic conditions that the counter (5) on the selected basic position is set, and the flip-flop element (4) is not set, and that after the input one respective unlocking information on the Paralielcus gangways the input unit (1) the associated output function via the assigned Code switch (2) is applied to the decision elements (3) and the counter (5) always only releases the correct decision element (3), the counter (5) at correct value input information at the decision element (3) by the pulse is continued, while with incorrectly selected input information regarding the absolute value and / or the sequence of steps via an impulse from the decision-making element (3) the counter is reset to the basic position via the flip-flop element (4) and is held, and that after each correct input information the last one Decision element (3) an impulse for the unlocking of the electronic lock supplies and at the same time resets the counter (5) to the basic position. 1. Elelctronic lock according to claims 1 to 3, d a d u r c h e k e n n n n e i n e t that this was occupied by incorrect input information Flip-flop element (4-) into the basic position with an external button or switch (7) is reset. 5. Electronic lock according to claims 1 to 3, d a d u r c h e k e n n n z e i c h n e t that a delay element (6) the end edge of the single pulse for the lock release delayed to the counter (5).