JPH0788730B2 - Radio wave key system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention performs radio wave communication between a control device for an electric lock provided at a door or in the vicinity thereof and a configurable key-shaped key transceiver. The present invention relates to a radio wave type key system suitable for locking and unlocking a house.

[Conventional technology]

Conventionally, as a system of this type, a request signal is transmitted from a control device to a key transceiver in response to an operation of a lock / unlock button provided on a door, etc., and the key transceiver receiving the request signal is stored in the inside thereof. A key code signal based on the existing key code is transmitted to the control device, and the control device receiving the key code signal compares the code of the key code signal with the key code stored in the internal non-rewritable ROM. However, it is known that a signal for locking and unlocking the electric lock is generated if the two match.

[Problems to be solved by the invention]

As described above, the conventional system has various inconveniences because the key code is stored in the control device by the non-rewritable ROM.

For example, when the system is applied to a house, there will be prepared key transceivers for the number of family members, but if one of them is lost, it will need to be replenished. At the time of this replenishment, the key transmitter / receiver must have the same code as the key code in the control device, so the customer who confirms that the key code of the customer matches the key code of the key transmitter / receiver to be replenished. There is a problem that the management cost is too high because it is necessary to manage the code for each and the inventory management for each code of the key code transceiver.

The present invention has been made in view of the above-mentioned problems, by making it possible to arbitrarily set a key code transceiver capable of locking and unlocking an electric lock,
It is intended to provide a radio wave type key system that does not require management of key codes for each customer and each key transceiver.

[Means for solving problems]

A radio wave key system made according to the present invention to solve the above problems is as shown in the basic configuration diagram of FIG.
Depending on the operation of the request code storage means A for storing the request code, the key code storage means B each having a plurality of areas for rewritably storing the key code, and the lock operation button C or the unlock operation button D. Request signal transmission means E for transmitting a request signal by radio wave based on the code stored in the request code storage means A,
Comparing means F for comparing the code of the key code signal received from the outside after transmitting the request signal from the request signal transmitting means E with the key code stored in the key code storing means B, and the comparing means F The control device X includes a locking / unlocking signal generating means H for supplying a locking / unlocking signal to the electric lock G in accordance with the output. The radio wave type key system also receives a request signal from the control device X, compares the received request signal with a request code stored inside, and stores a key stored inside according to the coincidence of both. It has a portable key transceiver Y that transmits a key code signal by radio waves based on a code.

Then, the control device X is operated when the key code is written in the key code storage means B, and the set operation means I is operated.
When the set operation means I is operated, a writing means J for writing a code of a key code signal received from the outside after transmitting a request signal to the key code storage means B, and a key code by the writing means J It further comprises writing area designating means K for designating an area in the key code storing means B to be written.

[Work]

With the above configuration, when the set operating means I is operated, the code of the key code signal received from any key transceiver is written in the area in the key code storing means B designated by the writing area designating means K. After that, the electric lock can be locked and unlocked by the arbitrary key transceiver.

As described above, the key code storage means is configured to store a plurality of key codes, and even if the key transceiver is lost or damaged, the storage area in which the key code of the lost or damaged key transceiver is stored. Since the key code of the newly prepared key transceiver is stored in the area other than, even if the key code of the newly prepared key transceiver is different, it affects other key transceivers that have been used up to now. The electric lock can be locked and unlocked without using it.

〔Example〕

An embodiment of a radio wave type key system according to the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing a schematic configuration of a radio wave key system, in which 1 is an electric lock attached to the frame side of a door of a house, for example, and the electric lock 1 includes a locking rod 1a and a locking rod 1a. It has an unlocking solenoid (not shown) for unlocking operation and a locking motor (not shown) for locking operation. An external operation box 2 is installed adjacent to an intercom 3 provided near the door. The external operation box 2 is provided with an external locking operation button 2a and an external unlocking operation button 2b on its surface, and the inside thereof has, for example, a locking indicator and an unlocking button provided corresponding to the operation buttons 2a and 2b, respectively. Indicator, antenna for external transmission and reception, external buzzer for warning,
An external lock and unlock switch operated by the operation buttons 2a and 2b are housed. Reference numeral 4 denotes a control device installed in the room, and an internal lock operation button 4 is provided on the panel surface thereof.
a, an internal unlocking operation button 4b, a set operation button 4c operated by a key, and a reset operation button 4d are provided, and an internal locking, an internal unlocking and Reset switch, internal antenna for sending and receiving,
In addition to the internal buzzer for warning, various circuit boards are housed. Further, the electric lock 1, the external operation box 2 and the control device 4 are interconnected via a connector 5. The control device 4 is also supplied with AC100V power through the AC cord 6.

Reference numeral 7 denotes a card-shaped key transceiver which is carried in a pocket or the like as a key for locking and unlocking the electric lock 1, and a power source is constantly supplied by a small built-in battery.

Although not shown, the electric lock 1 is also provided with a door lock state detection switch for detecting a door lock state and a door open / close detection switch for detecting a door open / closed state.

The control device 4 has an electric circuit configuration as shown in FIG. Reference numeral 41 is a microcomputer (hereinafter abbreviated as CPU) that operates according to a predetermined program.
41 has output ports O _{1 to} O ₉ and input ports I _{1 to} I ₁₃ . An unlocking solenoid and a locking motor in the electric lock 1, an unlocking indicator and a locking indicator of the external operation box 2, and an internal and external buzzer are connected to the output ports O _{1 to} O ₅ , respectively, and input. A door lock state detection switch, a door open / close detection switch, an external lock switch and an unlock switch, and an internal lock switch and an unlock switch are connected to the ports I _{1 to} I ₆ via an input circuit 43, respectively. In addition, the input port I ₇ set the operating unit
Set switch 44 operated by 4c, reset switch operated by reset operation button 4d for input port I ₈
45, 4-bit DIP switch 4 for input ports I _{9 to} I ₁₂
6 are connected respectively.

An oscillation circuit 47 and a modulation circuit 48 are connected to the output ports O ₆ and O ₇ , respectively, and when the output port O ₆ becomes H, the oscillation circuit 47
Starts to oscillate, and the modulation circuit 48 which inputs the output signal from the oscillation circuit 47 as a carrier modulates the carrier with the request code signal from the output port O ₇ . The modulated carrier is amplified by the amplifier circuit 49 and then sent to the internal and external transmitting / receiving antennas to be emitted as a request signal.

The key code signal received by the internal and external transmitting / receiving antennas and demodulated by the demodulation circuit 50 is input to the input port I ₁₃ . The demodulation circuit 50 includes a high frequency amplification circuit 50a, a ceramic filter 50b, an intermediate frequency amplification circuit (IFAMP) 50c, and a comparator 50d.

The output port O ₉ is connected to the base of the switching transistor Q ₂ whose emitter is connected to the ground, and the base of the switching transistor Q ₁ is connected to the collector of the switching transistor Q ₂ . The base of switching transistor Q ₁ also has a diode D ₁
Internal and external lock / unlock switches and set switch 44 are connected via ~ D ₅ , and when any one of these switches is turned on, transistor Q ₁ is turned on and + 12V power supply voltage is supplied to regulator 51. To do.

The regulator 51 supplies the stabilized power supply voltage to the port V of the CPU 41.
Supply to _DD, and the rising edge of its output is a differentiating capacitor.
The reset signal generated by being differentiated by C ₁ is the port RS
It is supplied to T to put the CPU 41 in the standby state. Port CL
A crystal oscillator 52 for clock generation is connected to ₁ and CL ₂ .

The CPU 41 has an internal RAM (not shown), and the internal RAM defines a request memory area RM, a code memory area CM, an area for temporarily storing input data which is a code of a received key code signal, and the like. Request memory area
As RM, 4 bits are assigned and numbers 1 to 15 are stored, and as code memory region CM, four regions CM _{1 to} CM ₄ each storing a 4-digit number are assigned.

On the other hand, the key transceiver 7 has a CPU 71 that operates according to a predetermined program, as shown in FIG. C
PU71 has such output ports O ₁ ~ O ₆ input port I ₁ ~I _2,
The oscillator circuit 72 and the modulator circuit 73 are connected to the output ports O ₁ and O ₂ , and the output ports O ₄ and O ₅ and the input port I ₂ are
ROM74 that stores request code and key code
Are connected. The oscillation circuit 72 starts oscillation when the output port O ₁ becomes H level, and supplies the oscillation output to the modulation circuit 73 as a carrier. The modulation circuit 73 modulates the carrier from the oscillation circuit 72 with the key code signal from the output port O ₂ and applies it to the base of the transistor Q ₃ . The transistor Q ₃ is driven by the carrier modulated by the key code signal and emits the key code signal via the transmitting / receiving antenna 75 connected to its collector.

The transmitting / receiving antenna 75 receives the request signal and supplies it to the demodulation circuit 76. The demodulation circuit 76 supplies the demodulated request signal to the input port I _{1 of the} CPU 71. Demodulation circuit 76
The output of is also applied to the control input of the electronic switch SW ₁ , and when the output of the demodulation circuit 76 rises, the electronic switch SW ₁ is turned on, and the battery 77 is connected to the port RST of the CPU 71 via the capacitor C _2.
, Which resets the CPU 71 to the standby state. The output port O ₃ is also connected to the control input of the electronic switch SW ₁ .

A control terminal of an electronic switch SW ₂ that supplies the power supply voltage of the battery 77 to the ROM 74 is connected to the output port O ₆ .

In the above configuration, the CPU 41 of the control device 4 executes the flowcharts of FIGS. 5A to 5C according to a predetermined program to perform a predetermined operation.

That is, when the lock operation buttons 2a, 4a or the unlock operation buttons 2b, 4b are operated to turn on the lock switch or the unlock switch,
The transistor Q ₁ is turned on, the power supply voltage stabilized by the regulator 51 is supplied to the port V _DD , and the reset signal is applied to the port RST. This allows the CPU
41 enters the standby state, starts executing the flowchart, sets the output port O ₉ to the H level, and turns on the transistor Q ₂ . Even if the lock switch or the unlock switch is turned off by turning on the transistor Q ₂ , the transistor Q ₁ is kept in the on state, and the supply of the power supply voltage to the port V _DD is held.

First, in the first step S1, it is determined whether or not the set switch 44 is turned on by the set operation unit 4c.
Judge according to the state of I ₇ . If the determination is NO, the process proceeds to step S2, where it is determined whether the external lock switch is on or not based on the state of the input port I ₃ . If the determination is YES, the process proceeds to step S3, where the output port O _{6 is set} to the H level to start the oscillation of the oscillation circuit 47, and
Output the request code to O ₇ . This request code is stored in the request memory area RM of the internal RAM of the CPU 41. As described above, in the modulation circuit 48, the request code modulates the oscillation output of the oscillation circuit 47, the modulated output is amplified by the amplification circuit 49, and is emitted as a request signal from the internal and external transmission / reception antennas.

After that, the process proceeds to step S4, where it is determined whether or not the code of the key code signal received from the internal / external key transceiver 7 matches the code stored in the code memory area CM of the internal RAM. When the determination in step S4 is YES, the process proceeds to step S5, in which the output port O _{2 is set} to H level to lock the door. When the determination in step S4 is NO,
The code signal from the key transceiver 7 is incorrect, and the flow chart ends.

When the determination in step S2 is NO, the process proceeds to step S6, where it is determined whether or not the external unlock switch is turned on, and when the determination is YES, the process proceeds to step S7. Step S
In 7, the request signal is output as in step S3, and then the process proceeds to step S8. In step S8, as in step S4, it is determined whether or not the input code matches the internal code. If the designation is YES, the door is unlocked in step S9. If the determination in step S8 is no, the execution of the flowchart is ended.

When the determination in step S6 is NO, the process proceeds to step S10, in which it is determined whether the internal lock switch is on. When the determination in step S10 is YES, the door is locked in step S11 without outputting the request signal. When the determination in step S10 is NO, step S12
Then, it is determined whether or not the internal unlock switch is turned on, and if the determination is YES, the door is immediately unlocked in the following step S13. When the determination in step S12 is NO, the process returns to step S2, and these are repeatedly executed until the determination of any of steps S2, S6, S10 or S12 becomes YES.

When the determination in step S1 is YES, that is, when the set switch is turned on by the set operation unit 4c of the control device 4, the process proceeds to step S21, where it is determined whether the reset switch 45 is turned on by the reset operation button 4d. Whether it is input port I ₈ or not is determined. When the determination in step S21 is YES, the process proceeds to step S22,
Here, the contents of each storage area of the code memory and request memory of the internal RAM of the CPU 41 are all cleared. Step S22
After completion of the above or when the determination in step S21 is NO, the process proceeds to step S23.

In step S23, it is determined based on the state of the input port I ₅ whether or not the internal lock switch is turned on. When the determination in step S23 is NO, the process proceeds to step S24,
Here, it is determined whether the set switch 44 is on. If this determination is YES, the process returns to step S1 (FIG. 5 (a)). Thereafter, the judgment in step S1 or S24 is N
The above steps S1 and S21 to S24 are repeatedly executed until O or the determination in step S23 becomes YES. When the determination in step S24 is NO, the execution of the flowchart is ended, and when the determination in step S23 is YES, the process proceeds to step S25.

In step S25, a request signal is transmitted according to the contents of the request memory area RM of the internal RAM. Subsequent to the transmission of this request signal, it is determined in step S26 whether or not the key code signal from the key transceiver 7 is normally received. When the determination in step S26 is YES,
The process proceeds to step S27, the DIP switch 46 on the states of the input ports I ₉ ~I ₁₂ where it is determined whether a 15, or "1111". The DIP switch 46 is for inputting whether or not to specify the code memory area CM in which the key code is to be rewritten, and the number of the specified memory area when the code is specified, and the code memory area to be rewritten by "1111". Enter that CM is not specified.

When the determination in step S27 is YES, steps S28 to S31
In, the code memory areas CM that are not empty are determined in order from the one with the largest number. In step S28, it is determined whether the content of the code memory area CM4 is 0, and the determination is N.
When it is O, it is determined that all the code memory areas CM are not empty, and the contents of the code memory areas CM are sequentially shifted in step S33, and as a result, the empty code memory areas are obtained.
The input data determined to be normally received in step S26 is stored in CM4.

When the determination in step S28 is YES, step S29
Then, it is determined here whether the code memory area CM3 is empty. If the determination in step S29 is no, the process proceeds to step S34, where the input data is stored in the code memory area CM4. If the determination in step S29 is YES, the process proceeds to step S30, in which it is determined whether or not the code memory area CM2 is empty. When the determination is NO, the input data is stored in the code memory area CM3. If the determination in step S31 is YES, the process proceeds to step S31, where it is determined whether the code memory area CM1 is empty, and if the determination is NO, the process proceeds to step S36 where the code memory region CM2 is
Store the input data in. When the determination in step S31 is YES, the process proceeds to step S32, where the input data is stored in the code memory area CM1 and then the process returns to step S1 (FIG. 5 (a)).

When the determination in step S27 is NO, that is, when the number of the code memory area CM to be rewritten is designated, the process proceeds to step S37, in which it is determined whether the DIP switch 46 is 1, that is, "0001". When the determination is YES, the input data is written in the code memory area CM1 in step S41. When the determination in step S37 is NO, the process proceeds to step S38, in which it is determined whether the DIP switch 46 is 2, that is, "0010". When the determination is YES, the input data is input to the code memory area CM2 in step S42. Memorize

Also, in steps S39 and S40, the DIP switch 46 is set to 3, 4,
That is, it is determined whether or not it is “0011” or “0100”. If the determination is YES, the code memory area is determined in steps S43 and S44.
The input data is stored in CM3 and CM4, respectively. After completion of the above steps S40 to S44, the process returns to step S1 (FIG. 5 (a)).

When the determination in step S26 is NO, the process proceeds to step S45, where it is determined whether or not the request memory area RM stores data. If this determination is YES, the buzzer is turned on in step S46 and the flowchart ends. That is, the determination in step S45 is based on whether or not the data cannot be input because the request code of the key transceiver 7 to be set does not match the request code stored in the request memory area RM. When the determination in step S45 is NO, it is determined that there is no request code in the request memory area RM, and the step
The process proceeds to S47, where 1 is set in the request memory area RM, and the request signal is transmitted in the following step S48 according to the set request code.

After transmitting the request signal in step S48, step S
In step 49, it is determined whether or not the input data from the key transceiver 7 is normally received. If the determination is YES, the process proceeds to step S27 described above (FIG. 5 (c)), and thereafter the code memory area. Writing to CM is performed. Step S4
When the determination result in 9 is NO, the process proceeds to step S50, where the content of the request memory area RM is incremented by 1 and it is determined whether or not it is 15. When the determination in step S50 is NO, the process returns to step S48, and the request memory area RM incremented by 1 is added here.
The request signal is output based on the number. Thereafter, until the determination at step S49 or S50 becomes YES, step S48-
Repeat S50. If the determination in step S50 is YES, the buzzer is turned on in step S46 to warn that the key code was not written normally, and the flowchart ends.

Although the key code is stored by turning on the set switch 44 and the internal lock switch in the above embodiment, a dedicated switch may be provided separately from the internal lock switch. Further, the number of code memory areas CM may be other than four.

The key transmitter / receiver 7 in FIG. 4 receives the request signal from the control device 4 in FIG. 3 by the transmitting / receiving antenna, and the CPU 71 detects the reception of the request signal by the input port I ₁ being at the H level. . The CPU 71 compares the code of the input request signal with the request code read from the ROM 74 to determine whether the two match, and when the determination is NO, stops the operation there. When the determination is YES, the key code is read from the ROM 74, this key code is output from the output port O ₂ , and the key code signal is emitted from the transmitting / receiving antenna 75 based on this key code. After outputting the key code from the output port O ₂ , the CPU 71 stops operating.

In the above embodiment, when one of the family members loses the key transceiver, the key transceiver of the new key transceiver is written in the code memory area by receiving the key transceiver having the matching request code. Can be used as a key. When the code memory area prepared in advance is full, the code memory area in which the lost key transceiver code is stored is designated by the DIP switch 46 to rewrite the content of the designated code memory area. You can

When the key code is not designated by the DIP switch 46, the key code is written in the empty code memory area, and when stored in all areas, the new code is stored instead of the oldest key code.

Furthermore, by clearing the contents already stored together with the request code, it is possible to set the key code of the key code transceiver having a completely new request code. Therefore, when the resident moves, for example, in the case of a rental apartment, the contents of the internal RAM can be rewritten with the request code and key code of the new key transceiver. This is useful, for example, when changing the key transmitter / receiver of a company's service door every day.

[Effect]

As described above, according to the present invention, the key code storage means secures an area for storing a plurality of key codes, and when the set operation means is operated, the key code storage means designated by the writing area designating means. Since the code of the key code signal received from the outside after transmitting the request signal can be written in the inner area, when the key transceiver is lost, the key code storage means corresponding to the lost key transceiver By designating the area by the writing area designating means, the key code of any new key transceiver can be easily set in place of the lost key transceiver of the key transceiver in the designated area, and all the key transceivers can be set. You can lock and unlock using the new key transceiver without the troublesome work of setting the key code of .

Since the key code of this key transceiver can be easily written on the user side, there is no need to manage the key code for each customer or each key transceiver on the supply side such as the manufacturer, and the management cost can be greatly reduced. The effect is also obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of a radio wave key system according to the present invention, FIG. 2 is a perspective view showing a simplified configuration of an embodiment of a system according to the present invention, and FIG. 3 is a control device in FIG. 4 is a circuit diagram showing the circuit configuration of the key transceiver shown in FIG. 2, and FIGS. 5 (a) to 5 (c) are flowcharts showing the operation of the CPU shown in FIG. It is a figure. X ... Control device, Y ... Key transceiver, A ... Request code storage means, B ... Key code storage means, C ...
Locking operation button, D ... Unlocking operation button, E ... Request signal transmitting means, F ... Comparison means, G ... Electric lock, H ... Locking / unlocking signal generating means, I ... Set operating means, J ... … Writing means. K: Writing area designating means

Claims (1)

[Claims] 1. A request code storage means for storing a request code, a key code storage means for rewritably storing a key code, and a request code storage means in response to an operation of a locking operation button or an unlocking operation button. A request signal transmitting means for transmitting a request signal by radio wave based on the code stored in, and a code of a key code signal received from the outside after transmitting the request signal from the request signal transmitting means and stored in the key code storing means. A control device having a comparison means for comparing the key code being stored and a locking / unlocking signal generating means for supplying a locking signal or an unlocking signal to the electric lock according to the output of the comparison means; Receives the request signal, compares the received request signal with the request code stored internally, and determines that they match. According to a radio wave type key system comprising a key transmitter / receiver capable of transmitting a key code signal by radio wave based on a key code stored therein, the key code storage means stores a plurality of key codes in a storage area. Is stored in the key code storage means, and the set operation means is operated when the key code is written in the key code storage means, and a request signal is transmitted from the outside when the set operation means is operated. Writing means for writing the code of the key code signal to the key code storage means, and writing area designating means for designating an area in the key code storage means when writing the key code by the writing means. Radio wave type key system.