JPH01116177A - Electric wave type key system - Google Patents

Abstract

PURPOSE: To certainly unlock a key device by a back-up electric power source of small capacity by providing an indicator light-out means to put out lights of a locking indicator and an unlocking indicator in accordance with power failure detection by a power failure detection means. CONSTITUTION: A request signal is transmitted from a request signal transmission means B to a key transceiver C in accordance with operation of an outer locking operation means A. A key code signal returned from the key transceiver C is received by a key code signal receiving means D, and it is compared with a previously set code by a comparison means E. A lock device F is locked and unlocked by matching detection of the both codes, the lock device F is locked and unlocked in accordance with operation of an inner locking and unlocking operation means G, and a locking and unlocking state is displayed by lighting of one of a locking indicator H and an unlocking indicator I. When a power failure detection means J detects a power failure, an electric power source change-over means K changes a power source from a commercial power source L over to a back-up power source M, and an indicator lights-out means N puts out lights of both of the indicators H, I.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a locking/unlocking control device that controls the locking/unlocking of a locking device provided on or near an opening/closing body such as a door, and a portable key transmitter/receiver. The present invention relates to a radio wave type key system in which communication is carried out by radio waves between the two, and when the communication is properly performed, the lock device is locked and unlocked.

[Prior art and problems to be solved by the invention] Conventionally, in this type of key system, when a lock operation button and an unlock operation button provided outdoors are operated, a predetermined signal is sent from the lock/unlock control device to the key transmitter/receiver. A request signal for the code is transmitted by radio waves, the key transmitter/receiver that receives the request signal returns a predetermined key code signal by radio waves, and the lock/unlock control device that receives the key code signal performs a predetermined verification, If the verification matches, the lock device is locked and unlocked. In this key system, a locking operation button and an unlocking operation button are also provided on the indoor side, and as a matter of course, by operating these buttons, it is possible to perform locking and unlocking operations even indoors. In the case of locking and unlocking indoors, no communication with the key transceiver is performed, and the locking device is immediately locked and unlocked in response to button operation.

In the room, there is a lock indicator and an unlock indicator that are always lit, one of which is always on, to inform the household of the current status of the lock device, that is, whether it is locked or unlocked, and to prevent people from forgetting to lock the lock. It is provided.

By the way, this type of key system usually uses commercial power, but if it does not work during a power outage, family members who return home will not be able to enter the room, so a backup power source is installed.
The idea is to make it possible to operate even during a power outage.

However, if you try to use a backup power source to perform all the same operations as normal, you will need a large-capacity backup power source, and if there is a power outage for a long time, you will have to go home and unlock the room when trying to enter. However, the problem arises that the locking device cannot be unlocked and the user is locked out of the door.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a radio-controlled key system that can reliably unlock the door using a small-capacity backup power source in the event of a power outage, thereby preventing lock-outs.

[Means for solving problems]

In order to solve the above-mentioned problems, the radio wave type key system made according to the present invention transmits a request signal from the request signal transmitting means B in response to the operation of the external locking operation means A, as shown in the basic configuration diagram of FIG. The key code signal returned from the key transceiver C that received the request signal is received by the key code signal receiving means, and the code of the received key code signal and the preset code are compared by the comparing means E. The locking device F is locked and unlocked by comparing the two codes, and the locking device F is directly locked and unlocked in response to the operation of the internal locking/unlocking operation means G, and the locking device F is directly locked and unlocked in response to the operation of the internal locking/unlocking operation means G. The locked/unlocked state of the locking device F is displayed by constantly lighting one of the provided locking indicator H and unlocking indicator ■, and in addition, in response to a power failure detected by the power failure detection means J, the power source is backed up from the commercial power source by the power supply switching means K. The power source M is switched to the power source M, and is characterized by comprising an indicator extinguishing means N for extinguishing the locking indicator H and the unlocking indicator (2) in response to the power failure detection by the power failure detecting means J.

[For production]

With the above configuration, when the power outage detection means J detects a power outage and the power supply switching means K switches the power supply from the commercial power supply to the backup power supply M in response to this, the indicator light extinguishing means N
are the locking indicator means H and the unlocking indicator means I
In order to turn off the lights, there is no need to supply power from the backup power source M to the indicator means 11 and I, which are always on and consume a relatively large amount of power (this minimizes the power consumption of the backup power source M). It is possible,
Even if there is a power outage, the lock device F can be reliably unlocked using the backup power source M when necessary.

〔Example〕

Embodiments of the radio 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 key system. In the figure, 1 is an electric lock as a locking device attached to the door frame of a house, for example, and the electric lock 1 is attached to a locking rod 1a. , an unlocking solenoid (not shown) for unlocking the locking rod 1a, and a locking motor (not shown) for locking the locking rod 1a. 2 is an external operation box, which is installed adjacent to the intercom 3 provided near the door.

The external operation box 2 has an external lock operation button 2a on its surface.
and an external unlocking operation button 2b, and a locking indicator and an unlocking indicator provided inside thereof corresponding to the operating buttons 2a and 2b, respectively, an external transmitting/receiving antenna, and an external warning buzzer, Operation S ports 2a and 2
External locking and unlocking switches each operated by b are housed therein.

4 is a control device installed in the room adjacent to the door,
On the panel surface, there is an internal locking operation S[14a], an internal unlocking operation button 4b, a set operation section 4C operated by a key, and a reset operation! 04d, and an internal lock switch provided corresponding to each operation button and operation part,
It houses various circuit boards, including an internal lock indicator, internal unlock switch, internal unlock indicator, reset switch, internal transmitting and receiving antenna, and internal warning buzzer. The electric lock 1, the operation box 2, and the control device 4 are interconnected via a connector 5.

The controller 4 also has an AC 100 via an AC cord 6.
V power is supplied, and a backup power supply 7 is built-in in case of a power outage.

8 is a card-shaped key transmitter/receiver that is carried in a pocket or the like as a key for locking and unlocking the electric lock 1;
Power 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 the door lock state and a door open/close detection switch for detecting the open/close state of the door. The door is also provided with a mechanical locking device, and the locking rod 1a can also be operated with a mechanical key.

The control device 4 has an electric circuit configuration as shown in FIG. In the figure, 41 is a microcomputer (hereinafter abbreviated as CPU) that operates according to a predetermined program, and the CPU 41 operates at output ports O3 to O0. . ,
It has input ports l, ~114, etc. Output boat 01
~0. are connected to the unlocking solenoid and locking motor in the electric lock 1, internal and external unlocking indicators, internal and external locking indicators, and internal and external buzzers, respectively, via the output circuit 42, and input ports I+ to l.

A door lock state detection switch, a door opening/closing detection switch, an external locking switch and an unlocking switch, and an internal locking switch and an unlocking switch are respectively connected to the input circuit 43. Further, the input port It has a set switch 44 operated by the set operation section 4C, the input port ts has a reset switch 45 operated by the reset operation button 4d, and the input ports ■ and ~11□ have a 4-bit deep switch. 46 are connected to each other.

Output ports 08 and 0. An oscillation circuit 47 and a modulation circuit 48 are respectively connected to the oscillation circuit 47 and the modulation circuit 48. When the output port Os becomes H level, the oscillation circuit 47 starts oscillating.
A modulation circuit 48 which inputs the output signal from as a carrier.
is the output boat 0. The carrier is modulated by the request code signal from.

After the modulated carrier is amplified by an amplifier circuit 49, it is sent to internal and external transmitting and receiving antennas and is emitted as a request signal.

A 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 113 . The demodulation circuit 50 includes a high frequency amplification circuit 50a, a ceramic filter 50b, and an intermediate frequency amplification circuit (I FAMP).
50c and a comparator 50d.

The output port O8° is connected to a control terminal of a switching circuit 51 provided between the backup power supply and the boat (2). The boat Vl)D is also supplied with a voltage of 12V obtained by rectifying and stepping down the commercial power supply via a voltage regulator 52 and a diode D1. The internal and external locking and unlocking switches and the set switch 44 are connected to the input of an OR gate 53 via an inverter, and the output of the OR gate 53 is connected to the control terminal of the switching circuit 51 via a diode D2. It is connected to boat R3T via. The boat R3T includes a Schmitt circuit 54 and a capacitor Ct.
The output of the voltage regulator 52 is connected via.

Note that the output of the voltage regulator 52 is connected to the input port 114, and the crystal oscillator 52 for lock generation is connected to the ports CL1 and CL2.

The CPU 41 has an internal RAM (not shown), and the internal RAM has 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. As the request memory area RM, 4 bits are allocated and 1 to
15 numbers are stored, and the code memory area CM includes four areas CM, ~CM, each storing a 4-digit number.
.

is assigned.

On the other hand, the key transceiver 8 has a CPU 81 that operates according to a predetermined program, as shown in FIG. CPtJ81 has output ports 01 to 04, input ports I+ to I3, etc. An oscillation circuit 82 and a modulation circuit 83 are connected to output ports O2 and O2, and output ports 04 and 0. Also connected to the input port I2 is a ROM 84 that stores request codes and key codes. The oscillation circuit 82 starts oscillating when the output port O1 becomes H level, and supplies the oscillation output to the modulation circuit 83 as a carrier. The modulation circuit 83 modulates the carrier from the oscillation circuit 82 with the key code signal from the output port 02 and applies it to the base of the transistor Q3. Transistor Q3 is driven by a carrier modulated by the key code signal, and emits the key code signal via a transmitting/receiving antenna 85 connected to its collector.

The transmitting/receiving antenna 85 receives the request signal and supplies it to the demodulation circuit 86 . The demodulation circuit 86 supplies the demodulated request signal to the input port 1 of the CPU 81. The output of the demodulation circuit 86 is also applied to the control input of the electronic switch SW, and when the output of the demodulation circuit 86 rises, the electronic switch SW1 is turned on, and the battery 87 is connected to the capacitor C2.
The CPU 81 is connected to the port R3T of the CPU 81 via the CPU 81, thereby resetting the CPU 81 and putting it into a standby state. Output port o3 is used as a control input for electronic switch SWI.
is also connected.

A control terminal of an electronic switch SW 2 that supplies the power supply voltage of the battery 87 to the ROM 84 is connected to the output port 06 .

In the above configuration, the CPU 41 of the control device 4 executes the flowcharts of FIGS. 5 to 11 according to a predetermined program and performs predetermined operations.

That is, the CPU 41 of the control device 4 causes the output voltage of the voltage regulator 52 to rise when the device is powered on, supplying the power supply voltage to the ports vI and D, and a capacitor for differentiating the rise of the H level of the output of the Schmitt circuit 54. When the reset signal generated by C2 is applied to port R3T, it enters a standby state and starts executing the flowchart.

First, in the first step Sl, the set operation section 4c
The input port I? determines whether the cent switch 44 is turned on or not. Judgment is made based on the state of This step S1
If the determination is YES, the process proceeds to step S2, where a process of setting key codes and request codes to predetermined areas CM and RM of the RAM in the CPU 41 is performed. In addition, it is already a commercial.

If a code is stored in the RM and a new code is to be set in its place, the reset switch 45 is turned on by the reset operation button 4d.

Since this setting process is not directly related to the present invention, detailed explanation will be omitted. After executing step S2, the process returns to step Sl.

If the determination in step S1 is NO, step S3
Then, it is determined whether the door lock state detection switch is on based on the state of the input port II, and it is determined whether the door is in the locked state.

When the determination in step S3 is YES, that is, when the door is in the locked state, the process advances to step S4, where output port 0. is raised to H level and the internal lock indicator lights up. When the determination in step S3 is No, that is, when the door is in the unlocked state, step S
Proceed to step 5, where the output port 03 is raised to H level and the internal unlock indicator is lit. Step 84 or S
After executing step 5, proceed to step S, where the input port ■
Based on the state of step 4, it is determined whether the external unlock switch is turned on. When the determination in step Sh is YES, the process proceeds to step S6° (FIG. 6), and when the determination is No, the process proceeds to step S.

In step S7, it is determined whether or not the internal unlock switch is turned on based on the state of the input port I6. If the determination in step S is YES, the process proceeds to step 5701 (Fig. 8), and if NO, the process proceeds to step S7. Proceed to S8. In step S8, the input port ■.

It is determined whether the external lock switch is turned on based on the state of , and if the determination in step S is YES, the process proceeds to step Sso+ (FIG. 9), and if NO, the process proceeds to step S. Ste Knob S, input port ■
It is determined whether the internal lock switch is turned on based on the state of step S9, and if the determination in step S9 is YES, step S. Proceed to step I (FIG. 11), and if No, proceed to step S1°.

In step S1°, it is determined whether or not there is a power outage based on the state of the input capacitor 114, and the determination in step S1° is N.
When O, that is, when there is no power outage, step S1
, and execute step 5INS9 described above again. Step S. If the judgment is YES, that is, there is a power outage,
Proceed to step Sll, where output capo)03~0. After lowering the signal to L level and turning off the internal and external indicators, execution of the flowchart is stopped.

In the above step S6゜1 (FIG. 6), the output port 0. is set to H level for 0.1 seconds and the internal and external buzzers are set to 0.1 seconds.
It turns on for seconds to notify that it has recognized that the external unlock switch is on. Then step S. The program proceeds to step 2, where it is determined whether the door is locked or not based on the state of the input capo (1+). If the determination is No, in step S 601 the output ports O, 04 are set to H level to light up the internal and external unlock indicators, and in step S 3604 the output port 07 is repeatedly set to H and L levels for a certain period of time to lock the internal and external locks. Sound the buzzer to warn you of different button operations, then step S.
Return to 1 (Figure 5).

When the determination in step S60+1 is YES,
Proceed to step S6.5, where the output port 03゜04
is set to H level, the internal and external locking indicators are turned on, and the process proceeds to step S6.6. In step S66&, the output port 08 is set to H level and the oscillation circuit 47 starts oscillating, and the code of the request signal is read from the area RM in the RAM and sequentially outputted from the output port O, thereby transmitting/receiving. A request signal is transmitted from the antenna, and the process then proceeds to step S&@7.

Step S. , it is determined whether or not a key code signal has been received from the key transmitter/receiver 8 based on the signal received by the transmitting/receiving antenna, demodulated by the demodulation circuit 50, and then input to the human-powered boat l+z.

The key code signal is received and the determination in step S6゜ is Y.
When it is ES, the process advances to step S60@, where the RAM
The key code is read from the middle area CM, and compared with the code of the received key code signal to determine whether or not the two match.

Step S above. If the determination in step 8 is YES, the process proceeds to step S69, where the output port ol is set to H level and the unlocking solenoid of the locking device 1 is driven to unlock it.
Then step Sl,l. Proceed to.

In step S6°, it is determined whether the voltage level of the battery of the key transceiver 8 has decreased based on the data transmitted together with the key code signal from the key transceiver 8,
If the determination is YES, the process proceeds to step 5e11, where the output port o is set to H level and the switch is turned on to warn of a drop in battery voltage and notify that the battery needs to be replaced. Then, if the judgment is No, step 5htz
and now output boats 0, 1, 0 . is set to H level and the internal and external unlock indicators are turned on, and then step S41. Proceed to. In step 5611, step S6
Starts an indicator timer that specifies the lighting time of the external unlock indicator that lights up at °. This step S, 1. After execution, the process advances to step shls (FIG. 7).

Note that the above step 5667s 5&. B's judgment is NO
If so, the process advances to step 5614, where step S
It is determined whether the request signal has already been transmitted twice in step 611&, and if the determination is No, the process returns to step 3606 and the request signal is transmitted again, and if the determination is YES, the process proceeds to step 86.3.

In step 5hys (Fig. 7), it is determined whether the door is open or not by detecting whether the door opening/closing switch is on or off depending on the state of the input port I2, and the determination is based on NO5, that is, the operation of the external unlocking switch. If the door has not yet been opened after the locking device 1 has been unlocked, step S is performed.
Proceed to 61&, step S, input boat ■14 in 16
It is determined whether or not there is a power outage based on the state of , and if the determination is NO and there is no power outage, step SKI? Proceed to , and input whether or not a new switch has been operated at Is~1.
Judgment will be made based on the following conditions. When this determination is YES, the process returns to the step S+ (FIG. 5), and when the determination is NO, the process proceeds to steps S6 and 8, and the process proceeds to the steps S&13.
Determine whether the indicator timer started at has timed out. When the determination in step 5618 is No, the process returns to step S61%, and when it is YES, the process proceeds to step S619.
After setting 06 to L level and extinguishing the external lock/unlock indicator, step S.

Return to (Figure 5).

Above step S61&, Sol? If the determination in step 5hts becomes YES while the determination in S&I 11 is NO, that is, if the door is opened within a certain period of time after unlocking, the process proceeds to step s izo, where the indicator timer is restarted. Thereafter, the process proceeds to step S&21, where it is determined whether or not the door is closed based on the state of the input port 2. If the determination is NO, that is, if the door remains open, the process proceeds to step Sbtt.

In step S1□, it is determined whether there is a power outage or not. If the determination in step S1□ is No, the process proceeds to step S&23, where it is determined whether there is a new switch input. If the determination in step S6□3 is YES, the process returns to the above step SI (Fig. 5), and if it is NO, the process proceeds to steps S6 and 4, where the indicator timer started in the above step Sbto has timed out. Determine whether or not the The determination in step S6□4 is No.
When , that is, when the time has not exceeded, the process returns to step S11, and step 36! 1 to 3624 are repeated until these determinations become YES. If the determination in step S6□4 is YES, step 563
1, and after turning off the external lock/unlock indicator, the process returns to step Sl (FIG. 5).

Before the determination in step 36.4 becomes YES, that is, before a certain period of time has elapsed since the door was opened, step S, 2. When the determination becomes YES, that is, when the door is closed, step S&! After proceeding to step S and waiting here for 1 second, proceeding to step S6!6. This one second wait time is to ensure that the door is closed.

In step s bzb, the output port O! is set to H level, the locking motor is driven, and the locking device 1 is locked. Thereafter, the process proceeds to step 36Z'l, where the internal and external lock indicators are turned on. Next, proceed to step S6°,
Here, it is determined whether there is a power outage or not, and if the determination is NO, the process proceeds to step S6+19.

In step S19, it is determined whether there is a new switch input, and if the determination is YES, the process returns to step S (FIG. 5), and if the determination is No, the process proceeds to step Sl, 3°.
Step S & here! . Determine whether the indicator timer started at has timed out. When the determination in step S6:1G is No, the process returns to step S6□8, steps Sits to S63° are repeated until one of them becomes YES, and step S6□8 is repeated.
ol. If the determination is YES, the external lock/unlock indicator is turned off in step S63+, and then the process returns to step SI (FIG. 5).

Note that step 51116. 5btz s S
When the determination as to whether or not there is a power outage in i+□ is YES, the process proceeds to steps S&3□ and 5613, where the internal and external lock/unlock indicators are turned off, and then the execution of the flowchart is stopped.

When the determination in step S7 is YES, that is, when the internal unlock switch is turned on, step S. 1
Proceed to (Figure 8). Step S? At O1, the buzzer is turned on for 0.1 seconds to notify that the internal unlock switch has been turned on. Then step S. 2, it is determined whether the door is in the locked state or not, and if the determination is NO, that is, the door is in the unlocked state, step S is performed.
7. After turning on the internal unlock indicator, the process proceeds to step 5704, where the buzzer is turned on to warn that the user has mistakenly operated the lock 1450, and then step S is shown (FIG. 5). Return to

On the other hand, if the determination in step S7.2 is YES, that is, if the door is locked, the process proceeds to step S7. Here, the internal lock indicator is turned on, and then step Sy is executed. Proceed to step 6, where the locking device l is unlocked. Step S. After that execution, proceed to step S7゜, where the internal unlock indicator is lit, and then step Sl
Return to (Figure 5).

When the determination in step S (FIG. 5) is YES, that is, when the external lock switch is turned on, the process proceeds to step Sso+ (FIG. 9). Step S801
Then, the buzzer is turned on for 0.1 seconds to notify that the on operation of the external locking switch has been recognized, and the process then proceeds to step S8.2, where it is determined whether the door is in the unlocked state. When the determination of this step s sex is No,
Proceed to step 5llo3, where the internal and external locking indicators are illuminated, then proceed to step 5l (14,
At this point, the buzzer is turned on to notify that the user has operated the wrong button, and then the process returns to step Sl (FIG. 5). On the other hand, when the determination in step S sag is YES, the process advances to step S sos.

In step S8, it is determined whether or not there is a power outage, and if this determination is NO, step S. Proceed to step 6, where the internal and external unlock indicators are turned on. Then step S. The process proceeds to step S7, where a request signal is transmitted, and then the process proceeds to step S8.8.

In step S6.8, it is determined whether or not a key code signal has been received from the key transmitter/receiver 8. If this determination is YES, the process proceeds to step S1109, where the code of the received key code signal and the internal key Compare the codes and determine whether they match.

If the determination in step S8° is YES, step Ss
Proceed to +o and lock the locking device l here. Thereafter, the process proceeds to step 5ll11, where it is determined whether the battery voltage of the key transmitter/receiver 8 has decreased based on the data received together with the key code signal. If the judgment is YES, go to step 5l.
Proceed to lI2 and click here.

Turn on - to warn of low battery voltage, then step S.
Proceed to 813. When the determination in step S, □ is NO, that is, when the battery voltage of the key transmitter/receiver is normal, the process immediately proceeds to step 5l113.In step 511+3, the internal and external lock indicators are lit, and then the process proceeds to step 5814, where Start the indicator timer.

Incidentally, when the determination in either of the above steps S8. If is NO, step S
Return to 8°, step S flO? - S1109 are repeated, and when the determination is YES, the process proceeds to step 51114 and the indicator timer is started.

After executing step Sll+4, step Ssz, (first
0), and it is determined here whether or not there is a power outage.

If the determination in step 5816 is NO, step S
Proceed to step □, where it is determined whether there is a new switch input, and if the determination is YES, step S, (Fig. 5)
If the answer is No, the process goes to step 5all. In step 58111, it is determined whether the indicator timer started in step S□4 has timed out. If the determination is no, the process goes to step S81. Return to YES
If so, the process proceeds to step 5l119, where the external locking indicator is turned off, and then the process returns to step S1 (FIG. 5).

Above step 5ees? Judgment of S*+h is YES
When , that is, when it is determined that a power outage has occurred, step S8□. Proceeding to (FIG. 10), after turning off the internal and external locking/unlocking indicators, the execution of the flowchart is stopped.

When the determination in step S9 (FIG. 5) is YES, that is, when the internal lock switch is turned on, step S. , (Fig. 11) and turn the buzzer to 0.
．． It turns on for 1 second to let you know that it has recognized the switch on. The process then proceeds to step S9.2, where it is determined whether the door is in the unlocked state. If the determination is NO, proceed to step s9 (13, where the internal lock indicator is turned on, and then step S.4, where the buzzer is turned on to warn of incorrect button operation, and then step S1 (Fig. 5) )
Return to

On the other hand, step S. If the determination in step 2 is YES, step S. , and here it is determined whether there is a power outage or not. This step S. When the Ill constant of , is No (7), step S. The process proceeds to Step 6, where the internal unlocking indicator is turned on, and then the process proceeds to Step S9.7. Step S. , the locking device 1 is locked, and then step S9
The process proceeds to step 011, where the internal locking indicator is turned on, and then the process returns to step Sl (FIG. 5).

Step S above. When the determination of , is YES, that is, when there is a power outage, step S. , and here inside,
After the external lock/unlock indicator is turned off, the execution of the flowchart is stopped. Therefore, in the event of a power outage, the lock switch will not be used to lock the door, and in this case, the mechanical key may be used to lock the door.

As described above, step 5ea (FIG. 5), step 56
16jS6□2, S6□Il (Figure 7), Step 5
eos (Figure 9), step Sll+6 (first
When a power outage is detected in steps S9 and (Fig. 11), the output capo is set to turn off the internal and external lock/unlock indicators in the next step.
All of them are set to L level. Therefore, the internal lock/unlock indicators, one of which is always lit when there is no power outage, are turned off, eliminating the need to supply power from the backup power supply 7 to the indicators for lighting, and reducing the power consumption of the bank amplifier power supply 7. It can be suppressed.

Further, since execution of the flowchart is stopped after all of the indicators are turned off, the power required to run the CPU 41 can also be cut. Then, when either the internal or external lock switch is turned on, the CPU4
1 is supplied with power and performs the work corresponding to the switch operation. In addition, when the operated switch is a locking switch, the locking operation according to the operation is not performed, and after extinguishing the internal and external indicators, the execution of the flowchart is stopped. On the other hand, if the unlock switch is operated, the execution of the flowchart is stopped after performing a predetermined unlocking operation.

As described above, in the event of a power outage, only the minimum necessary work is performed, and together with the indicator lamp being turned off, the backup power supply is extended for a long time, so that the necessary unlocking operation can be performed reliably. On the other hand, with regard to locking, there is no problem since the locking device 1 can be locked and unlocked from the outside by input key operation and from the inside by manual operation of the operating knob.

〔effect〕

As explained above, according to the present invention, one side of the internal lock/unlock indicator, which is always on and generally consumes a large amount of power, is turned off during a power outage, so that the consumption of the backup power source can be minimized. Even in the event of a long-term power outage, the lock device can be reliably unlocked using a small-capacity backup power source, and family members can be prevented from being locked out.

[Brief explanation of the drawing]

“Figure 1 is a block diagram showing the basic configuration of the radio key system according to the present invention, Figure 2 is a perspective view showing an example of the use of the radio key system according to the present invention, and Figure 3 is a portion of Figure 2. 4 is a circuit diagram showing a specific example of a key transceiver, which is a part of FIG. 2, and FIGS. 5 to 11 are in FIG. FIG. 12 is a diagram showing a flowchart executed by the CPU in FIG. 4. A: external locking/unlocking operation means, B: request signal transmitting means, C: ...Key transmitter/receiver, D...Key code signal receiving means, E...Comparison means, F...Lock device, G
...Internal lock/unlock operation means, H...Lock indicator means, ■...Unlock indicator means, J...Power failure detection means, K...Power supply switching means, L...Commercial power supply, M
...Bank up power supply, N...Indicator extinguishing means, Fig. 8 Fig. 10

Claims (1)

[Claims] Key code signal receiving means transmits a request signal from a request signal transmitting means in response to an operation of an external lock/unlock operating means, and receives a key code signal returned from a key transceiver that has received the request signal. A comparison means compares the code of the received key code signal with a preset code, and locks and unlocks the locking device upon detecting a match between the two codes, and also locks the locking device according to the operation of the internal locking/unlocking operation means. Directly locking and unlocking the device, displaying the locked/unlocked state of the locking device by constantly lighting one of the locking indicator and the unlocking indicator provided adjacent to the internal locking/unlocking operation means, and detecting a power outage by the power outage detection means. In the radio key system, the power source is switched from a commercial power supply to a backup power source by a power supply switching means according to the power supply, comprising an indicator light extinguishing means for extinguishing the lock indicator and the unlock indicator in response to a power failure detected by the power failure detection means. A radio key system characterized by: