JPH01278671A - Remotely operated lock control device - Google Patents

Abstract

PURPOSE:To improve the robbery prevention effect by providing an arithmetic means progressively changing code numbers in the preset order on a transmitter and its memory means on a receiver and unlocking a lock when the code number is progressively changed in the preset order as compared with the preceding code number. CONSTITUTION:A transmitter 1 such as a control circuit 12 generating electromagnetic waves containing the preset code number and a receiver 2 receiving it and outputting an unlocking signal when detecting the preset code number are provided. An arithmetic means progressively changing code numbers in the preset order in response to the number of transmissions is provided on the transmitter 1. A memory means of code numbers in electromagnetic waves from the transmitter 1 is provided on the receiver 2, it compares the preceding code number and the stored next code number and generates an unlocking signal of a lock when the code numbers are progressively changed in the preset order. Even if electromagnetic waves are copied by other reading devices, this lock can not be unlocked.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a locking device, and particularly to a locking device using electromagnetic waves that can be remotely controlled.

For example, as shown in Japanese Patent Publication No. Sho 63-11509, a remote control lock control device is known that unlocks a lock device using infrared rays containing a predetermined code number. This remote control lock control device includes a transmitting device including a manually operated switch, and receives infrared rays emitted from the transmitting device when the switch is pressed, and detects a predetermined code number included in the infrared rays. and a receiving device that supplies an unlock signal to the lock device. This remote control lock control device can unlock the lock device by emitting infrared rays from a position approximately 1 m or more away from the sensor section of the light receiving device. Therefore, there is an advantage that the unlocking operation by pressing the switch of the transmitting device can be simplified and accelerated.

Remote control technology, which uses infrared radiation containing a specific code number to control electronic devices, is used in various fields. For example, when changing television channels, a transmitting device emits infrared rays containing different code numbers for each channel. These code numbers are fixed and unchanging code signals. When the infrared radiation is emitted toward the identification device, the identification device can determine the received code number, store it, and emit infrared radiation containing the same code number.

In other words, the infrared rays containing the code number can be identified by the identification device, and the infrared rays containing the same code number can be copied and emitted. The code number contained is immediately determined by an identification device. Moreover, by emitting infrared rays containing the same code number from the identification device, the remote control lock control device can be easily unlocked without using a transmitting device dedicated to the remote control lock control device. can. Therefore, for such an identification device, the anti-theft effect of a remote control lock control device using infrared rays is diminished.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to solve the above problems and provide a remote control lock control device that is operated via electromagnetic waves containing a changing code number.

A remote control lock control device according to the present invention includes a transmitting device that generates electromagnetic waves including a predetermined code number, and a locking device that locks when receiving the electromagnetic waves emitted from the transmitting device and detecting the predetermined code number. and a receiving device that supplies an unlocking signal to the device. The transmitting device has arithmetic means for progressively changing the code number in a predetermined order in accordance with the number of times of transmission. The receiving device also includes a storage means for storing a code number included in the electromagnetic waves transmitted from the transmitting device, and a preceding code number that was previously transmitted from the transmitting device and stored in the storage means, and a code number that was subsequently stored in the storage means. and comparing means for comparing the code number with the next code number and generating an unlocking signal to the locking device when the code number is progressively changed in a predetermined order with respect to the preceding code number.

The code numbers included in the electromagnetic waves emitted from the Sho-Yu transmitter are changed in a predetermined order in accordance with the number of emitted waves. A receiving device that receives electromagnetic waves emitted from a transmitting device stores the received code number and compares this code number with a stored preceding code number. When the condition that the newly stored code number is progressively changed in a predetermined order with respect to the previous code number is satisfied, the comparing means generates an unlocking signal to the locking device. As described above, in the remote control lock control device of the present invention, the receiving device does not generate an unlocking signal unless the code number included in the electromagnetic waves emitted from the transmitting device changes according to certain conditions.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An infrared remote control lock control device according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

First, FIG. 1 shows a circuit diagram of a transmitting device. The transmitting device 1 includes a control circuit 10 consisting of a one-chip microcomputer (CPU), and a ROM (ROM) connected to the control circuit 10.
Read Onl,y Memory) 26, a switch 12 having one end connected to the input port It of the control circuit 1o via a capacitor 11;
Battery 1 connected in parallel between the other end and ground
3 and a smoothing capacitor 14, a chattering prevention capacitor 15 connected between one end of the switch 12 and the ground, and a pulse shaping resistor 16 and a diode connected in parallel between one end of the capacitor 11 and the ground. 17 and the output port of the control circuit 10 via the resistor 18
, a transistor 19 having a base connected to the ROM 26 and an emitter connected to the ROM 26, an infrared emitting diode 20 and a resistor 21 connected in series between the collector of the transistor 19 and the ground, and the output of the control circuit 1o. A resistor 22 and a light emitting diode 23 are connected in series between the port 02 and the ROM 26, and a resistor 24 is connected between the other end of the capacitor 11 and ground.

It has an oscillation resistor 25 connected to the input port I2 of the control circuit 10. Capacitor 11 is ROM26
The other end of the switch 12 is connected to the output port 0. of the control circuit 10. connected to.

In the above configuration, when the switch 12 is turned on manually, a reset pulse is applied to the input port via the capacitor 11 and the resistor 16.

Therefore, the control circuit 1o is operated according to the sequence shown in FIG. The control circuit 10 according to a predetermined sequence
When activated, the transistor 19 is turned on and off once or a predetermined number of times by the output from the output port oi. The on/off operation of this transistor 19 corresponds to an infrared signal indicating a fixed number and a predetermined code number. A diode 20 for infrared radiation flashes by turning on and off the transistor 19. Since the blinking of the diode 20 cannot be discerned with the naked eye, the light emitting diode 23, which generates visible light, lights up for a short time when the diode 20 is activated.

Next, the operation sequence of the control circuit 1o shown in FIG. 2 will be described.

From the start, it is determined in step 30 whether the switch 12 is turned on. If the switch 12 is not turned on, the process returns to the start. When the switch 12 is turned on, as described above, a reset pulse is applied to the input port E (step 31), where the control circuit 10
The fixed number stored in the OM 26 is read (step 32).

Next, the previously used and stored code number is read (step 33), and a predetermined number α is added or subtracted from the read code number (step 34). Addition or subtraction of the predetermined number α is selectively performed. Next, in step 35, the fixed number and the code number are converted into a pulse code and an output is generated as an infrared ray. This infrared ray is output repeatedly one or more times.

The fixed number is used to determine whether the signal emitted from the transmitting device 1 is suitable for the receiving device.

In addition, the code number is a number unique to each remote control lock control device.9For example, the code number is 1, OOO,
It displays signals in the digits of 000 to 2,000,000. There are various methods for pulse encoding fixed numbers and code numbers.

For example, it may be configured to display a fixed number first when the infrared is turned on and off, and then display a code number that is subsequently added to or subtracted from the fixed number; conversely, the code number may be displayed first. , then a fixed number may be displayed. Alternatively, a fixed number can be inserted between each digit of the code number and displayed as an infrared signal. As long as the code number is changed progressively according to a predetermined order or formula, the code number may be progressively changed by progressive addition or subtraction, and these additions and subtractions include multiplication, division, or calculation based on a specific arithmetic formula. It is also possible to repeat addition and subtraction alternately, if necessary.

In practice, if a new code number is obtained by adding or subtracting the preceding code number and comparing the new code number with the preceding code number in terms of size, the calculation means of the control bag e10 can be determined relatively easily. I can do it.

FIG. 3 shows a circuit diagram of the receiving device 2. As shown in FIG. The receiving device 2 includes a sensor circuit 40 , a control circuit 41 that receives a signal from the sensor circuit 40 , and a lock control circuit 42 that is activated by the output of the control circuit 41 . The sensor circuit 40 includes a one-chip infrared light receiving circuit 50 and an amplifier circuit 51 that amplifies a signal received by the infrared light receiving circuit 50 and supplies it to the control circuit 41. The amplifier circuit 51 includes two transistors 5
2 and 53. Positive line 54 of sensor circuit 40
is the output port 0. of the control circuit 41. The negative line 55 of the sensor circuit 40 is grounded. Positive side line 54
Smoothing capacitors 56 and 57 are connected in parallel to the negative side line 55. Further, the positive line 54 is connected to the output capacitor 102 of the control circuit 41 via a display light emitting diode 58 and a resistor 59.

The emitter of the transistor 52 is connected to the positive line 54 , the base is connected to the light receiving circuit 50 , and the collector is connected to the base of the transistor 53 . The emitter of the transistor 53 is connected to the negative line and the collector is connected to the control circuit 4 via the diode 60.
1 input port E, and diode 6
1 to the base of transistor 62. The emitter of the transistor 62 is connected to the power supply, and the collector is connected to the input port L of the control circuit 41 via the reset circuit 63. The reset circuit 63 is a transistor 62
a resistor 64 connected between the emitter of and ground;
A capacitor 65 connected between the emitter of the transistor 62 and the input port I, and a resistor 66 and a diode 67 connected in parallel between the input port I7 and ground.
and has.

The control circuit 41 is a CPU composed of a one-chip microcomputer, and operates according to the sequence shown in FIG. 4, which will be described later. Input port 2 of control circuit 41
A ROM 68 is connected to the connector. A fixed number is stored in the ROM 68.

Transistors 70 and 71 as driver circuits are connected to output ports O1 and 04 of the control circuit 41 via resistors 72 and 73, respectively. The collector of the transistor 70 is connected to the power supply via the coil 75 of the relay 74, and the emitter is grounded.

Similarly, the collector of transistor 71 is connected to fl! via coil 77 of relay 76. source and the emitter is grounded. Of the three contacts of relays 74 and 76, contact 74
a and 76a are connected to a power source. Contacts 74b and 76b are grounded. Contacts 74c and 76c are connected to both terminals of a motor 80 that drives the locking device. A back electromotive force prevention controller 81 is connected to the motor 80 . Furthermore, input ports I and I of the control circuit 41 are connected to a state detection device 82 that detects the locked state and unlocked state of the locking device. The state detection device 82 has a switch (not shown), and this switch is switched when the locking device is locked or unlocked.

In the above configuration, the infrared rays generated from the infrared ray emitting diode 20 when the switch 12 of the transmitting device 1 is activated are received by the infrared receiving circuit 50 at step 9 in FIG.

The signal generated by the infrared light receiving circuit 50 is transmitted to the amplifier circuit 51.
The signal is supplied to the input port of the control circuit 41 via the control circuit 41.

At the same time, when the amplifier circuit 51 is turned on, the transistor 62 is turned on. Therefore, a trigger signal is applied to the input port of the control circuit 41 via the reset circuit 63, and the control circuit 41 is activated (step 91).

Therefore, the control circuit 41 uses the storage means to control the input port 11.
The received light signal supplied to the receiver is stored (step 92).

At the same time or after this, the control circuit 41 inputs the fixed number stored in the ROM 68 to RAM (RandomAc
cess Memory) or other storage means (
Step 93).

Here, by the comparison means provided in the control circuit 41,
The fixed number included in the signal from the transmitting device 1 supplied through the light receiving circuit 50 and the fixed number stored in the ROM 68 are compared (step 94), when the received fixed number and the read fixed number do not match. is returned to the start. vice versa.

When these fixed numbers match, the previous code number memorized last time is compared with the currently input code number,
It is determined whether the input code number is larger or smaller than the preceding code number.

In this embodiment, it is selectively determined whether the code number is larger or smaller than the preceding code number.

If the correct code number is entered, a certain number will be progressively added. In this case, it is determined whether the currently input code number is larger than the preceding code number.

If the code number is greater than the preceding code number in step 95, the control circuit 41 outputs the output port 0. An unlock signal is sent to the transistor 70 for a certain period of time (for example, 0.5 seconds) (step 98). Therefore, the transistor 70 is turned on, the coil 75 of the relay 74 is energized, the contacts 74a and 74c are connected, and the motor 80 rotates in one direction.

Therefore, the locking device (not shown) is unlocked (step 9).
9).

When it is smaller than the preceding code number in step 95,
The control circuit 41 stores the current code number in the storage means (step 96), and compares it with all the preceding code numbers of the previous n times (for example, 3 times) to see if it is larger or smaller.

In this embodiment, the case is set to be larger than the preceding code number, so if it is larger than the preceding code number, the process proceeds to step 98, and an unlocking signal is sent from the output port O1. If it is smaller than the preceding code number, the process returns to the start from step 97.

The control device 41 receives a signal from the state detection device 82, and when the infrared signal emitted from the transmitting device 1 conforms to the sequence shown in FIG. 4 and the locking device is in the locked state, the output port 0. The lock signal is activated for a certain period of time (e.g. 0.5 seconds)
and switches transistor 71 on. . Therefore, the relay 76 is energized and the coil 77 is energized, so that the contacts 76a and 76c are connected. Therefore, a current flows in the opposite direction to the motor 80, and the locking device is locked. In the above embodiment, a case has been described in which the code number increases progressively, but when the code number reaches the maximum value within a predetermined numerical range, it is returned to the initial small value.

The above embodiments of the invention can be modified. For example, in addition to progressive addition, when performing progressive subtraction where the code number gradually decreases, the present invention can be configured to perform addition, subtraction, multiplication, division, or other operations within a certain numerical range according to a predetermined order or formula. It is.

Although infrared rays are used to communicate between the transmitting device 1 and the receiving device 2, various electromagnetic waves other than infrared rays, such as normal visible light and radio waves, can be used.

The remote control lock control device of this invention uses electromagnetic waves that represent progressively changing code numbers, so even if the electromagnetic waves are copied with another reading device, the copied signal will not unlock the lock device. Can not.

Therefore, the anti-theft effect of the remote control lock control device can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a transmitting device used in a remote control lock control device according to the present invention, and FIG. 2 is a flowchart showing the operation of the transmitting device shown in FIG. 1. FIG. 3 is a circuit diagram of a receiving device used in the remote control lock control device according to the present invention, and FIG. 4 is a flowchart showing the operation of the receiving device shown in FIG. 3. 166 transmitting device, 28. Receiving device. Patent applicant Kokusan Metal Industry Co., Ltd. Figure 1 Figure 2 Figure 4

Claims (1)

[Claims] a transmitting device that generates electromagnetic waves containing a predetermined code number;
In a remote control lock control device having a receiving device that receives electromagnetic waves emitted from the transmitting device and supplies an unlocking signal to the locking device when a predetermined code number is detected, the transmitting device transmits a predetermined code number corresponding to the number of times the transmitting device transmits a code. The receiving device has a calculation means for progressively changing the code number in the order of , and the receiving device has a storage device for storing the code number included in the electromagnetic waves transmitted from the transmitting device, and a code number previously transmitted from the transmitting device and stored in the storing device. The preceding code number is compared with the next code number subsequently stored in the storage means, and when this code number has been progressively changed in a predetermined order with respect to the preceding code number, an unlocking signal is sent to the locking device. 1. A remote control lock control device, characterized in that it has a comparison means for generating a signal.