JPS6175181A - Electronic lock apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electronic lock device for IW locking various types of locks such as door locks, trunk locks, and steering locks of automobiles using radio.

[Prior art]

2. Description of the Related Art Devices for unlocking various types of locks using radio waves have been conventionally known. In other words, the owner's transmitter modulates the coded signal with high frequency and transmits it from the antenna.
The receiver side, that is, the car's receiver, determines whether the encoded signal received and demodulated matches the code set in advance on the receiver side, and unlocks when it matches. This is what I did.

[Problems with conventional technology]

By the way, in the above-mentioned technique, it was not possible to issue an alarm when the lock was illegally unlocked due to theft or the like. In other words, when the lock is unlocked, it is difficult to determine whether the lock was unlocked by legitimate wireless communication or by fraud (picking).
This is because it is difficult to disconnect.

[Purpose of the invention]

The present invention has been made in view of the above points, and its object is that the %W information circuit is always in operation,
Only when the vehicle receives a signal from the transmitter owned by the owner i11 'A? To provide an electronic lock device in which a D circuit is made inactive and an alarm circuit is activated when unlocking with other keys.

[Embodiments of the invention]

Figure 1 shows the transmitter located by the owner, Figure 2 shows the vehicle 1.
! The reception circuit and control circuit of f11 are shown in Fig. 1. In Fig. 1, 1 to 3 are door switches for opening the door, and 1 to 3 are the trunk inch for opening the rank and the switch for unlocking the steering lock. It's a steering wheel switch. 4 to 6 are numbers of a desired number of digits corresponding to the closed switch 4 (for example, 4 digits "■", "2", "3", "4" or 2”, “3”, “4”, “1” or “3”, “4”
This is a fixed number generation circuit that sends out a fixed number corresponding to the numbers "°l" and "2" as a serial signal. Reference numeral 7 designates an OR gate 9 which outputs the output to the next stage modulation circuit 9 when the outputs of the fixed number generation circuits 4 to 6 are input, and 8 designates a high frequency oscillation circuit for transmitting the signal from the OR gate 7 as a radio wave. , 9 is a modulation circuit that modulates the signal from the OR gate 7 with a high frequency signal from the cough high frequency oscillation circuit, 1o is a high frequency amplification circuit that amplifies the modulated signal from the modulation circuit 9, and its output is sent to the air from the antenna 11. will be sent to.

Next, to explain the block diagram of FIG. 2, 12 is an antenna provided separately for each vehicle 1, and 13 is a tuning port 1 which selects and receives radio waves from the owner's transmitter that are incident through the antenna 12. , 14 is a demodulation circuit that demodulates the signal from the tuning circuit 13 to obtain a fixed number frequency signal (pulse signal); 15 is a low frequency amplification circuit that amplifies the fixed number signal obtained by the demodulation circuit 14; 16 is the number of digits of the fixed number signal sent out from the low frequency amplification circuit 15 (this implementation (9)
11, 'l', '2', '3'.

A counting circuit 17 counts fixed number signals (for example, "1", "2", "3", "4", etc.) from the low frequency amplification circuit 15. ”); 18 to 20 are the counting circuits 16;
When the circuit counts a predetermined number of digits (4 digits in this example) and sends out an output, the fixed number outputs a fixed number signal that matches the fixed number generating circuits 4 to 6 predetermined in advance. The storage circuits 21 to 23 compare the output from the human number storage circuit 17 and the output from the fixed number storage circuits 18 to 20, respectively, and send out the respective outputs when they match.
The membrane circuit 24 receives the output from the counting circuit 16.
), a reset circuit for resetting the counting circuit 22;
5 is the output of the comparison circuits 21 to 23 (IiT) which sends an output when one of them is input;
) If the defense is set, and the key is turned on when a friend is found, it is set when the switch is turned on, that is, when the key lock switch is on, and it is turned on when the door is opened. When either of the door LI7 lock switch 27.1--trunk power that turns on when the rank cover is opened, the hood lock switch 29 that turns on when the foot is opened, sends an output 110 30 to 32 are plungers for the door actuator, blunt actuator for the trunk actuator, and steering lock actuator which are to be unlocked when the switches 1 to 3 are turned on; Depending on the output, you can open the doors, open the trunk cover, and turn the steering wheel. Note that 33 is a delay circuit that sends out the output for a certain period of time (for example, 30 seconds) when the output from the comparison circuits 21 to 23 is input manually.

Next, to explain the operation with reference to the block diagram, when the user turns on the door switch l provided on the transmitter in order to get into the car, the fixed number generation circuit 4 generates a door unlock code 1'', for example. 4 digits “1”, “’2°,
Fixed number signals "3" and "4" are output as serial signals. This signal is modulated by a modulation circuit 9 into a high frequency carrier wave generated by a high frequency oscillation circuit 8 via an OR gate 7, and then amplified by a high frequency amplifier circuit 10 and transmitted as a radio wave from an antenna 11.

When this radio wave is input from the antenna 12 on the car side and tuned by the tuning circuit 13, a pulse signal, which is a low frequency signal, is detected by the detection circuit 14, amplified by the low frequency amplification circuit 15, and sent to the manual number storage circuit 17. The numerical value of the fixed number signal for each digit is stored as an al signal, and the counting circuit I6
The number of digits is counted.

When the counting circuit 22 counts a predetermined number of digits (4 digits in this embodiment), the fixed number storage circuits 18 to 20
Since a signal is input to the memory circuits 18 to 20, respective fixed number signals are outputted from the memory circuits 18 to 20.
The numbers stored in step 7 are compared in comparison circuits 21-23.

As a result, when the output of the input number storage circuit 17 and the output of the fixed number storage circuit 18 match, an output is sent from the comparison circuit 2I. This energizes the door actuator plumper 30 and brings the door into the unlocked state.

Furthermore, since the delay circuit 33 is connected to the output of the comparison circuit 21, the steering lock actuator plunger 32 is also energized during the delay time caused by the delay circuit 33, and the steering lock becomes unlocked.

Furthermore, the output from the comparison circuit 21 causes the OR gate 2
5, the alarm circuit 26 is reset and the alarm circuit 2
6, no output is sent out and no alarm is issued.

Incidentally, when the signal from the counting circuit 1G is output, a reset signal is outputted from the reset circuit 24 to the counting circuit 6, and the counting circuit 16 is set and returns to the initial state.

Further, when the trunk open switch 2 is turned on, the trunk actiniator plunger 31 is energized by the same operation as described above, and the trunk can be opened and the steering lock can also be unlocked.

Next, the door is opened illegally and the door lock switch 27 is opened.
When closed, since there is no output from the alarm circuit 26 or the comparator circuits 21 to 23, the alarm circuit 26 sends an output, and therefore the il! to the headlamp relay and horn relay. When the electric power is turned on, the headlights and horn operate, and the relay that prohibits the starter from operating also operates, making it impossible to start the car.

Also, if the trunk cover lock switch 28 or the foot lock switch 29 is turned on by unauthorized means, an output is sent from the alarm circuit 26 in the same manner as described above, and the W warning and starter making 1 are prohibited.

Note that the parts other than the above-mentioned transmitter/receiver can be replaced by a microcomputer.

〔Effect of the invention〕

As described above, in the present invention, when an unlocking signal is transmitted from the transmission device on the owner side, this signal is received on the vehicle side, and when the signal matches a preset signal on the vehicle side, the output is Since the key corresponding to the unlock signal is unlocked and the alarm circuit is rendered inactive by the output, the alarm circuit is not activated when the lock is unlocked by a signal other than the unlock signal from the owner's transmitter. The circuit operates, so it has the effect of effectively preventing theft due to picking during unauthorized unlocking.

[Brief explanation of drawings]

The figures show an example of an electronic lock device according to the present invention, FIG. 1 is a block diagram of an owner-side transmitter, and FIG. 2 is a block diagram showing a vehicle-side circuit. 1-3...Switch, 4-6...Fixed number signal circuit, 17...Manual number storage circuit, 18-20...Fixed number storage circuit, 21-23...Comparison circuit, 26.・・・
Alarm circuit, 30-32...Plunger for actuator.

Claims (1)

[Claims] Switches such as door switches and trunk switches are provided, and a user-side transmitter transmits a fixed number for each switch as a radio wave, and a vehicle-side receiver receives radio waves from the transmitter and demodulates the fixed number. , a comparison circuit that compares the fixed number from the receiver with a number stored on the vehicle side, and if the comparison results in a match, selectively operates a load such as a door actuator or a trunk actuator;
An electronic lock device comprising an alarm circuit that is rendered inoperative by an output from the comparison circuit.