JP2656506B2 - Radio key system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a locking / unlocking control device for controlling the locking / unlocking of a locking device provided at a door or in the vicinity thereof. The present invention relates to a radio-wave key system for performing locking and unlocking of a lock device when the communication is properly performed. [Problems to be Solved by Related Art and Invention] Conventionally, as a key system of this type, when a lock operation button and an unlock operation button provided near a lock device are operated, a key transmission / reception from a lock / unlock control device is performed. A request signal of a predetermined code is transmitted to the machine by radio waves, and the key transceiver that has received the request signal returns a predetermined key code signal by radio waves,
There is a lock / unlock control device that receives the key code signal, performs a predetermined collation, and locks / unlocks the lock device if the collation matches.

As described above, in the radio key system, in order to lock and unlock the lock device, it is only necessary to perform a very simple operation of, for example, simply pressing the lock operation button, so that the lock device in the unlocked or locked state is used. When locking or unlocking, the unlocking or locking operation may be performed by mistake using the locking / unlocking operation button. Since the locking device does not operate when such an erroneous operation is performed, there is a serious problem in theft prevention especially when the locking device is not locked when locking is to be performed.

Therefore, in view of the above-described problems, the present invention has a problem that the locking device is left in the unlocked state because the locking device is erroneously unlocked where the locking operation should be performed in locking the unlocked device. It is an object of the present invention to provide a radio key system in which the anti-theft property is improved by preventing as much as possible.

[Means for solving the problem]

In order to solve the above-mentioned problems, the radio key system according to the present invention comprises a portable key transceiver 13 for returning a key code signal in response to a request signal, as shown in the basic configuration diagram of FIG. A request signal transmitting means 121a for transmitting a request signal in response to an operation of the locking / unlocking operation means 7, 8 provided outside the house, and a key code signal receiving for receiving a key code signal returned from the key transceiver. Means 121b, and a comparing means 121c for comparing the code of the received key code signal with a preset code, and detecting that both codes are coincident with each other. Control device 12 for locking and unlocking 3
An unlocked state detecting means 121d for detecting an unlocked state of the lock device, and an unlocked state detected by the unlocked state detecting means when the unlocked state detecting means detects the unlocked state. Warning sound generating means 11 for generating a warning sound for warning an erroneous operation of the locking / unlocking operation means in response to the unlocking operation
And characterized in that:

[Action]

With the above configuration, when the unlocking / unlocking operation means 7 and 8 are unlocked, if the unlocked state detecting means 121d detects the unlocked state of the lock device 12, the alarm sound generating means 11 generates an alarm sound. And
The operator can be notified that the lock device 12 is not locked.

〔Example〕

An embodiment of a radio key system according to the present invention applied to a door lock of a house will be described below with reference to FIGS.

FIG. 2 is a diagram showing a schematic configuration of the radio key system, in which unlocking of a locking rod (not shown) adjacent to a lock (not shown) of the door 1 of the house is performed. A solenoid 2 for locking and a locking motor 3 for performing a locking operation are provided. An unlocking operation button 5 and a locking operation button 6 are arranged adjacent to an intercom 4 provided near the door 1.

At the center of these buttons, as shown in FIG. 3, an unlocking indicator 7 and a locking indicator 8, each of which is formed by an LED, for example, are provided to indicate the respective states. In a case 9 in which the buttons 5 and 6 are arranged on the surface, a transmission / reception bar antenna 10 and a warning buzzer 11 are incorporated. The unlocking solenoid 2, the locking motor 3, the switches (not shown) operated by the unlocking operation buttons 5 and 6, the indicators 7 and 8, the bar antenna 10 and the buzzer 11 are provided inside the house. Interconnected with the locking and unlocking control device 12 to be operated.

Reference numeral 13 denotes a key transceiver that can be carried by the owner in a pocket or the like instead of the mechanical key of the lock of the house, and its power is always on.

Although not shown in FIG. 2, a door lock state detection switch for detecting a door lock state and a door open / close detection switch for detecting a door open / close state are also provided. It is connected to the.

As shown in FIG. 4, the lock / unlock control device 12 includes a microcomputer (hereinafter abbreviated as CPU) 121 partly operating according to a predetermined program. The CPU 121 has output ports O _{1 to} O ₁₀ and input port I ₁
~I ₆ has etc., to the output port O ₁ ~ O _5, the output circuit 122
, An unlocking solenoid 2, a locking motor 3, an unlocking indicator 7, a locking indicator 8 and a buzzer 11 as a warning sound generating means are connected to each other through the input ports I ₁ to I ₂ .
The I _4, via an input circuit 124, unlock state detecting means 121d as a door lock state detection switch (not shown) that detects the unlocked state of the lock device, the door opening detection switch, lock switch and the unlock switch, respectively It is connected. A memory 124 storing various codes is connected to the output ports O ₆ and O ₇ and the input port I ₅ .

Oscillation output ports O ₉ and O ₁₀ circuit 125 and the modulation circuit 12
6 are connected to each other, and when the output port O ₉ becomes H level, the oscillation circuit 125 starts oscillating. The modulation circuit 126 which inputs the output signal from the oscillation circuit 125 as a carrier is a request code signal from the output port O _10. Modulates the carrier. After the modulated carrier is amplified by the amplifier circuit 127, it is sent to the transmission / reception bar antenna 9 and emitted as a request signal.

The output ports O ₉ and O ₁₀ , the oscillation circuit 125, the modulation circuit 126, and the amplification circuit 127 transmit a request signal in response to the operation of the unlock operation button 5 and the lock operation button 6 provided outside the house. The request signal transmission unit 121a is included.

A key code signal received by the transmission / reception bar antenna 9 and demodulated by the demodulation circuit 128 is input to the input port I ₆ . The demodulation circuit 128 includes a high frequency amplification circuit 128a, a ceramic filter 128b, an intermediate frequency amplification circuit (IF AMP) 128c, and a comparator 128d.

Incidentally, the intermediate frequency amplifying circuit (IF AMP) 128c and the input port I ₆ constitute a key code signal receiving means 121b for receiving a key code signal sent back from the key transceiver 13.

The output port O _8, is connected the collector to the base of the switching transistor Q _1, the base of the switching transistor Q ₂ to which the emitter is connected is connected to ground. Also to the base of the switching transistor Q _1, a diode D _1, and D ₂ to have been normally open lock switch and the unlock switch is connected via respectively, lock switch or the unlock switch is locking operation buttons 6 or unlocking Operation button 5
Once turned on by the operation, the transistor Q ₁ is turned on +
The power supply voltage of 12 V is supplied to the regulator 129.

The regulator 129 supplies the stabilized power supply voltage to the port _VDD of the CPU 121. Reset signal rise of the output is generated is differentiated by the differentiation capacitor C ₁ is supplied to the port RST, CPU 121 is in the standby state.
Crystal oscillator 130 for clock generation in port CL ₁ and CL ₂
Is connected.

On the other hand, as shown in FIG.
CPU1 part of which operates according to a predetermined program
31. CPU 131 has output ports O _{1 to} O ₇ ,
Has an input port I ₁ ~I _3, the output ports O ₁ and O ₂ is connected an oscillation circuit 132 and the modulation circuit 133, an output port O ₄
And the O ₅ and the input port I ₂ is connected to a memory 134 in which various codes are stored. Oscillation circuit 132 starts oscillating by the output port O ₁ becomes H level, and supplies its output to the modulation circuit 133. The modulation circuit 133 is an oscillation circuit
The output signal from the 132 as a carrier, the transistor is modulated by the key code signal from the output port O ₂ of this
It is applied to the base of Q _3. Transistor Q ₃ are driven by the modulated carrier by a key code signal, it emits a key code signal via the transmitting and receiving bar antenna 135 connected to its collector.

The transmission / reception bar antenna 135 receives the request signal and supplies it to the demodulation circuit 136. The demodulation circuit 136 is composed of a detection circuit 136a and the operational amplifier 136 b, and supplies the request signal demodulated into the input port I ₁ of the CPU 131. Demodulation circuit
The output of 136 is being also applied to the control input of the electronic switch SW _1, switch SW ₁ when the output of the demodulation circuit 136 rises is turned on, the port RST of CPU131 battery 137 through the capacitor C ₂
To reset the CPU 131 to the standby state. The control input of the switch SW ₁ is also connected the output port O _3.

The output port O ₆ and O _7, the control terminal of each supplied electronic switches SW ₂ and SW ₃ to the power supply voltage of the battery 137 memory 134 and the low voltage detector 138 are connected respectively, low to the input port I ₃ The output of the voltage detector 138 is connected.
Low voltage detector 138 checks the voltage divided by the voltage dividing resistors R ₁ and R _2, the voltage of the battery 137 is detected to be decreased.

In the above configuration, the CPU 121 of the locking and unlocking control device 12
The flowcharts of FIGS. 6 (a) and 6 (b) are executed according to a predetermined program to perform a predetermined operation.

That is, when the unlocking operation button 5 or locking operation button 6 unlock switch or lock switch is connected is turned on, the power supply voltage at which the transistor Q ₁ is stabilized by being turned regulator 129 supplied to the port V _DD At the same time, a reset signal is applied to the port RST. This allows the CPU 121
There becomes a standby state, and starts execution of the flow chart, the output port O ₈ to H level to turn on the transistor Q _2. By turning on the transistor Q _2, be solved is on the unlock switch or lock switch, the transistor Q ₁ is kept ON state, supply of power supply voltage to the port V _DD is maintained.

First, in the first step S1, it is determined whether or not a power failure has occurred based on the state of an input port (not shown). Is determined by a power failure step S2 when YES, the determining the states of the input ports I ₃ here whether lock switch is turned on. When the determination is YES, that is, when a power failure occurs and the lock switch is on, the CPU 121 sets all output ports to L level to enter the stop mode, and stops the operation of the system. As a result, the locking operation is not performed in the power failure state even if the locking operation is performed. At the time of power failure, the operation is performed by a backup power supply (not shown).

When the determination in step SI is NO, that is, when there is no power failure, or when the determination in step S2 is NO, that is, when the locking operation is not performed, the process proceeds to step S3. Step S3
In detects the state of the door lock state detection switch by the input port I _1, the door is determined whether the locked state. When the door is locked and the judgment is YES,
The output port O ₃ proceeds to step S4 in the H level turns on the lock indicator 7, the door is determined not in a locked state
When NO, the output port O ₄ proceeds to step S5 to turn on the unlocking indicator 8 in the H level.

Then the process proceeds to step S6, where by the output port O ₅ in a predetermined time period (e.g., 0.1 sec) H level to drive the meantime buzzer 11, for example, sound the sound of 3 KHz. Then step S7
The process proceeds, wherein detecting the state of the door opening and closing detection switch by the input port I _2, the door is equal to or closed.
If the door is open and the determination is NO, step S8
Proceeds to here by the output port O ₅ to 6 times the H level at 0.2 second intervals to drive the buzzer 11, the door by sound intermittent sound 3KHz to warn that it is in an open state. When the door is closed and the determination is YES, the process proceeds to step S9.

In step S9, the output port O ₉ with starting the oscillation to the oscillator circuit 125 to H level, reads out the code signal of the normal key for the request signal from the memory 124 by sequentially outputting this from the output port O ₁₀ Then, a normal key request signal is transmitted from the transmission / reception bar antenna 9, and then the process proceeds to step S10.

In step S10, determines the signal whether it has received the key code signal from the key transceiver 13, which is received by the reception bar antenna 9 is input to the input port I ₆ after being demodulated by the demodulation circuit 128 . When the key code signal is received and the determination is YES, the process proceeds to step S11, where the normal key code stored in the memory 124 is read, and this is compared with the code of the key code signal. Determine whether or not.

When the determination in step S10 is not received NO, that a key code signal, the process proceeds to step S12, where the read code signal of the master key for the request signal from the memory 124, and sequentially outputs it from the output port O ₁₀ As a result, the master key request signal is transmitted from the transmission / reception bar antenna 9, and then the process proceeds to step S13.

In step S13, it is determined whether a key code signal has been received from the key transceiver 13 in the same manner as in step S10S. If the determination is NO, the process proceeds to step S14. In step S14, it is determined whether the request signal for the normal key and the request signal for the master key have been transmitted a predetermined number of times (for example, four times). If the determination is no more than the predetermined number, the process returns to step S9. If the determination in step S13 is YES, it is determined whether the received key code signal matches the master key code read from memory 124.

When the determinations in steps S11 and S15 are NO, the determination in step S14 is performed, and when the determination is YES, the process proceeds to step S21. If the determination in step S14 is YES, step
In S16, drive the buzzer 11 for 0.2 seconds at 5 millisecond intervals,
After emitting a modulated sound obtained by modulating a 3 KHz sound with a 100 Hz signal, the process proceeds to step S31.

In step S21, it is determined whether or not the lock switch is turned on. If the determination is NO, the process proceeds to step S22, where it is determined whether or not the unlock switch is turned on. If the determination in step S22 is NO, the stop mode is set. If the determination is YES, the process proceeds to step S23, where it is determined whether the door is in the state. If the determination in step S23 is NO, a warning that the door is not in a locked state is issued in step S24 by turning on the buzzer 11 three times at intervals of 0.2 seconds to emit a 3 KHz sound intermittently. That is, when the unlocking operation is performed when the door is not locked, it is determined that the operation is erroneous, and a warning sound is generated. An output port I ₁ of the CPU121 in the step S25 when the determination is YES in step S23 in the H level to drive the release solenoid 2, performs unlocking operation,
Thereafter, the process proceeds to step S29.

If the determination in step S21 is YES, step S26
Then, it is determined whether or not the door is locked. If the determination in step S26 is YES, the stop mode is entered after the buzzer 11 is turned on three times at 0.2 second intervals and a 3KHz sound is emitted intermittently in step S27 to warn that the door is locked. . If the determination in step S26 is NO, the process proceeds to step S28, where the output port O ₂
Is set to the H level, the locking motor 3 is driven to perform the locking operation, and then the process proceeds to step S29.

In step S29, based on the data transmitted together with the key code signal from the key transceiver 13, the key
It is determined whether or not the battery voltage level of the battery has dropped. If the determination is YES, the process proceeds to step S30, and the buzzer 11 is turned on to warn that the battery voltage has dropped and the battery needs to be replaced. When the determination is NO, the process proceeds to step S31.

In step S31, a timer for regulating the lighting time of the indicator 7 or 8 is started, and thereafter, in step S32
Proceed to. In step S32, it is determined whether or not the door is locked. If the determination is NO, the unlock indicator 7 is turned on in step S33. If the determination is YES, the locking indicator 8 is turned on in step S34. Proceed to S35.

In step S35, a 0.5-second timer is started, and a standby state is entered until the timer expires.After 0.5 second has elapsed, the process proceeds to step S36, where it is determined whether or not a power failure has occurred, and if the determination is YES, the process proceeds to step S36. After turning off the unlocking indicator 7 or the locking indicator 8 which is lit in S37, the operation is terminated in the stop mode, and when the determination is NO, the process proceeds to step S38.

In step S38, it is determined whether or not there is an input from the unlock switch or the lock switch, and if the determination is YES, the operation up to that point is interrupted to enter the stop mode,
The operation from the first step S1 is restarted, and when the determination is NO, the process proceeds to step S39. In step S39, a normal request signal is transmitted, and in step S40, the code of the key code signal transmitted from the key transceiver 13 in response to the reception of the normal request signal is compared with the normal key code. Result It is determined whether or not both match. If the determination in step S40 is YES, step S41
After turning off the currently lit indicator 7 or 8 in step S42, the process waits for 0.5 seconds in step S42, and determines in step S43 whether the timer started in step S31 has timed out. If the timer has not timed out and the determination in step S43 is NO, the process returns to step S32, and the above steps are repeatedly executed.

As described above, the indicator 7 or 8 corresponding to the locked state of the door is flashed at 0.5-second intervals until the determination in step S36 or S38 is YES or the determination in step S40 or S43 is NO. If the operator holding the key transceiver 13 is more than 1 m away from the door while in this blinking state, communication is disabled, the determination in step S40 becomes NO, the process proceeds to step S44, and the indicator in the blinking state After turning off 7 or 8, the stop mode is set.
On the other hand, if the operator does not have the key transceiver 13 and has left the key inside the communicable door, the communication will be continued even if the operator is more than 1 m away from the door. The blinking indicator 7 or 8 is not turned off, and the blinking is interrupted until the determination in step S43 becomes YES, that is, until the timer started in step S31 times out.

Therefore, the operator knows that the key transceiver has been left in a place where the key transceiver can be communicated because the flashing indicator after the locking / unlocking operation is still flashing even when the operator is away from the door by a predetermined distance. be able to.

The transmission / reception bar antenna 9 of the lock / unlock control device 12 shown in FIG.
Is received by the transmission / reception bar antenna 135 of the key transceiver 13 shown in FIG.

CPU131 key transceiver 13 first detects that the input port I ₁ by the reception of the request signal has become H level 8
In the first step S1, the execution of the flowchart shown in the figure is started, and the code of the input request signal is read from the memory 134 or compared with the request code to determine whether or not the two match each other. In the case of, the operation is stopped in the stop mode. Judgment is YES
When the proceeds to a step S2, the state of the input port I _3, where it is determined whether the normal or the battery voltage, the determination
If NO, information indicating that the battery is not normal is added to the key code transmitted in step S3, and if YES, information indicating that the battery is normal is added to the key code transmitted in step S4. Proceeds to execute after the step S5 in the step S3 or S4, where outputs the key code from the output port O _2, modulate the oscillation output of the oscillation circuit 132 circuit 133
, And transmits a key code signal from the transmission / reception bar antenna 135. After the transmission of the key code signal, the mode is set to the stop mode and the operation is stopped.

As is clear from the description of the operation performed by the CPU 121 with reference to the flowcharts of FIGS. 6A and 6B, the CPU 121 converts the code of the received key code signal and the code set in advance. Comparing means 121c for detecting that both codes match, and unlocked state detecting means 121d for detecting the unlocked state of the lock device.

〔effect〕

As described above, according to the present invention, a warning sound is generated when an operator performs an unlocking operation by mistake when locking an unlocked lock device, so that the operator can be informed of the erroneous operation without fail. That the lock device can be left in the unlocked state due to an accidental unlocking operation, greatly improving the antitheft property. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of a radio key system according to the present invention, FIG. 2 is a perspective view showing an example of use of a radio key system according to the present invention, and FIG. 3 is a part of FIG. Enlarged perspective view, FIG. 4 is a circuit diagram showing a specific example of a lock / unlock control device which is a part in FIG. 2, and FIG. 5 is a circuit diagram showing a specific example of a key transceiver which is a part in FIG. 6 (a) and 6 (b) are diagrams showing a flowchart executed by the CPU in FIG. 4, and FIG. 7 is a diagram showing a flowchart executed by the CPU in FIG. 7, 8 locking / unlocking operation means, 121a request signal transmitting means, 13 key transmitter / receiver, 121b key code signal receiving means, 121c comparison means, 2, 3, locking device, 121d …
Unlocked state detecting means, 11 ... warning sound generating means, 12 ... control device.

Claims (1)

(57) [Claims] 1. A portable key transceiver for returning a key code signal in response to receiving a request signal, and a request signal transmitting means for transmitting a request signal in response to an operation of a locking / unlocking operation means provided outside the house. And a key code signal receiving means for receiving a key code signal returned from the key transceiver, and comparing the code of the received key code signal with a preset code, and that both codes match. Comparing means for detecting
An unlocked state detecting means for detecting an unlocked state of the lock device, wherein the unlocked state detecting means comprises an unlocked state. A warning sound generating means for generating a warning sound to warn of an erroneous operation of the locking / unlocking operation means in response to the unlocking operation by the locking / unlocking operation means. Key system.