JPH08312212A - Remote control type locking device - Google Patents

Abstract

PURPOSE: To prevent the unlocking operation with the illegal behavior by setting the discrimination time at the time of unlocking in response to the length of the code signal to be transmitted at the time of locking operation. CONSTITUTION: A CPU 13 stores the transmitting time of the code signal, which is sent from a transmitter 1 at the time of locking operation, with a memory 14 and a counter 15, and the CPU 13 discriminates that the code signal is transmitted over the stored time or not at the time of unlocking operation. At the time of locking operation, locking is immediately performed with the first code signal, but the transmitting time at this stage is set as a time to be required for the confirmation at the time of unlocking operation, the whole of the code signal necessary for the unlocking becomes a long signal, which is hard to be copied by a learning remote control, and the unlocking operation with the unfair behavior can be surely prevented. The code signal transmitting time can be desirably set by changing the ON time of an operation switch 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a remote control lock device known as a so-called keyless entry device.

[0002]

2. Description of the Related Art This type of remote control lock device is used for homes, automobiles, etc., and many devices use a method of transmitting or receiving a fixed code signal to perform locking or unlocking operation of a lock or the like. Has been adopted. Especially for residential use, very high security is required, but since the fixed code signal of such a device can be copied relatively easily by using a so-called learning remote controller that is commercially available, it is highly safe. Sex is difficult to obtain. In order to solve this, for example, a method of bidirectional communication between a transmitter and a receiver, a method of updating a code signal transmitted from the transmitter every time, and the like have been proposed. However, in the former case, both need to have a transmitting function and a receiving function, and in the latter case, the circuit configuration tends to be complicated, and thus there is a problem that the device generally becomes large and the cost increases.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in view of these points, and has been made for the purpose of making it difficult to copy a code signal while improving safety while avoiding an increase in size and cost of the device. is there.

[0004]

In order to achieve the above-mentioned object, the present invention determines a code signal transmitted from a transmitter and determines whether or not the code signal matches a predetermined code signal. , In a remote control lock device configured to perform locking or unlocking operation when they match, the determination time for unlocking operation is set according to the length of the code signal transmitted during locking operation It is supposed to be done.

Further, the transmitter / receiver constituting this device is
For example, a transmitter equipped with an operating means that can arbitrarily set the transmission time of the code signal and the transmission time of the code signal from the transmitter during the lock operation are stored, and the code signal is continued beyond this stored time. It is possible to use a receiver provided with a determination means for performing an unlocking operation when received by receiving.

[0006]

According to the present invention, since a code signal longer than that of a normal device can be set, it is difficult to copy with a learning remote controller, and unlocking operation due to an illegal act is prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment shown in the drawings will be described below. FIG.
Is a schematic block diagram, 1 is a transmitter, and 11 is a receiver. The transmitter 1 includes a CPU 2, a code storage unit 3, an output unit 4, an operation switch 5, and the like, and the receiver 11 includes an input unit 12, a CPU 13, a memory 14, a counter 15, an output circuit 16, an actuator 17, and the like. There is. In addition to the above, a power supply battery and the like are provided, but they are not shown in the figure.

The code storage unit 3 of the transmitter 1 stores a code signal different for each device and may be provided with a setting means capable of changing the code signal as required. The output unit 4 sends a signal of a predetermined format to infrared rays,
The signal is transmitted by an appropriate means such as ultrasonic waves or radio waves, and is configured to output a signal while the operation switch 5 is on.

The input section 12 of the receiver 11 is constructed so as to receive the above-mentioned signal transmitted from the output section 14 of the transmitter 1, demodulate this signal and input it to the CPU 13. CP
U13 is configured to determine whether or not the input signal matches a preset code signal, and when it matches, operate the output circuit 16 to drive the actuator 17 to perform a lock or unlock operation. Has been done. Further, in the CPU 13, the memory 14 and the counter 1
5, the transmission time of the code signal sent from the transmitter 1 at the time of the lock operation is stored, and at the time of the unlock operation, it is also determined whether or not the code signal is transmitted over the stored time. . Hereinafter, an example of the specific control procedure will be described with reference to the flowcharts shown in FIGS. 2 and 3.

FIG. 2 shows the procedure on the transmitter side. First, when the operation switch 5 is turned on, steps S1 to S2 are performed.
And the transmission of the code signal is paused after the transmission of the code signal for a certain period of time. This transmission and pause are set, for example, to 150 msec each, and when a total of 300 msec has elapsed, the process returns to step S1. If the operation switch 5 is continuously turned on, the process proceeds to step S2 again, and the transmission described above is continued during the on period. The pause is repeated.

FIG. 3 shows the procedure on the receiver side. Receiver 11
Then, if there is the transmission in the above step S2, it is determined in step S11 whether or not the code signals match, and if they match, in the next step S12, for example, the locked state of the door is checked, and the unlocked state is determined. Step S if there is
Proceed to step 13 to clear the memory 14, and then the actuator 1
Drive 7 to lock the door.

In the next step S14, it is checked that the next code signal has not been transmitted even after the pause time in step S2 has passed. If the pause time in step S2 is 150 msec as described above, then Wait for a slightly longer time, for example, 200 msec, and if there is no transmission during that time, the process returns to step S11. If there is another transmission within this time, the process proceeds to step S15 to determine whether the code signals match.
If they do not match, the process returns to step S11, and if they do match, the value in the memory 14 is incremented and step S1 is performed.
The process returns to step 4, and this operation is repeated while the operation switch 5 is turned on. That is, the memory is incremented according to the time during which the operation switch 5 is turned on in step S1, and the transmission time of the code signal is thereby stored.

If it is in the locked state in step S12, the process proceeds to step S16 to clear the counter 15, and in step S17 the values of the memory 14 and the counter 15 are compared. If the counter value is equal to or greater than the memory value, the process proceeds to step S18, the actuator 17 is driven, and the door is unlocked. However, if the operation switch 5 is turned on for transmitting the code signal twice or more during the lock operation, the value of the counter becomes smaller than this because the memory 14 is incremented according to the number of repetitions. It proceeds to step S19.

In step S19, the pause time in step S2 is slightly longer than 150 msec, for example, 200 msec.
If there is no transmission for msec, the process returns to step S11. If there is another transmission within this time, the process proceeds to step S20 to determine whether the code signals match, and if they do not match, the process returns to step S11. On the other hand, if the code signals match, the value of the counter 15 is incremented, the process returns to step S17, and the above operation is repeated. Therefore, the counter is counted according to the time during which the operation switch 5 is turned on during the lock operation. Is incremented.

Therefore, the value of the counter becomes equal to or larger than the value of the memory and the process can proceed to step S18 only when the transmission of the code signal is continued beyond the time of the lock operation, and the transmission time is locked. If it is shorter than the operation time, the process does not proceed to step S18, and the unlocking operation is not performed. After the unlocking operation in step S18, the process proceeds to step S21, and if the transmission of the code signal is completed, the process proceeds to step S21.
Returning to 11, the series of unlocking operations ends.

As described above, when the lock operation is performed, the signal is immediately locked by the first code signal, but since the transmission time at that time is set as the time required for confirmation during the unlock operation, the unlock operation is performed. The required code signal is long as a whole, which is difficult to copy with the learning remote controller, so that the unlock operation due to an illegal act can be more reliably prevented. Further, the transmission time of the code signal can be arbitrarily set by changing the time during which the operation switch 5 is turned on. Therefore, for example, in the case of absent for a long time and in the case of not staying while considering the balance between safety and responsiveness. It is also possible to use them properly. Also,
Even if the entire transmission time is long, the basic code itself may be short, and by repeating this as in the embodiment, a long signal can be obtained, so that the device circuit is not complicated and the device is large. There is no increase or increase in cost.

[0017]

As is apparent from the above description, the remote control type lock device of the present invention is a device which performs a locking or unlocking operation when the code signals coincide with each other, and the determination time for the unlocking operation is This is set according to the length of the code signal transmitted during the lock operation. Therefore, the code signal required for unlocking becomes long, making it difficult to copy with the learning remote controller, and the unlocking operation due to an illegal act is prevented, and the safety of the locking device is improved.

Further, the transmitter of this apparatus is provided with an operating means capable of arbitrarily setting the transmission time of the code signal, and the receiver performs an unlocking operation when the code signal is continuously received over the transmission time. In the case of the device provided with the discrimination means, it is not necessary to provide the transmission time setting means in the transmitter or the switching means for switching the discrimination time in the receiver, and it is easy to obtain a compact and low-cost locking device. Becomes

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an embodiment of the present invention.

FIG. 2 is a flowchart showing a control procedure of the transmitter of the embodiment.

FIG. 3 is a flowchart showing a control procedure of the receiver of the embodiment.

[Explanation of symbols]

 1 transmitter 2 CPU 3 code storage unit 4 output unit 5 operation switch 11 receiver 12 input unit 13 CPU 14 memory 15 counter 16 output circuit 17 actuator

Claims (3)

[Claims] 1. A code signal transmitted from a transmitter is received by a receiver to determine whether or not it matches a predetermined code signal, and if they match, a lock or unlock operation is performed. In remote control type locking device,
A remote control lock device, wherein a determination time for unlocking operation is set according to the length of a code signal transmitted during lock operation. 2. The remote control type lock device according to claim 1, wherein the transmitter is provided with an operating means capable of arbitrarily setting the transmission time of the code signal. 3. The receiver is provided with a discriminating means for storing the transmission time of the code signal at the time of the lock operation, and performing the unlocking operation when the code signal is continuously received over the stored time. The remote control type lock device according to 1.