JPH01214680A - Radio wave type key system - Google Patents

Abstract

PURPOSE:To make a new optional key code settable as necessary by constituting a code of a key code signal received from the outside after transmitting a request signal so as to be written in a key code memory means. CONSTITUTION:A controller X is provided with a request code memory means A, a key code memory means B, a request signal transmitting means E, a comparing means F and a locking-unlocking signal generating means H. In addition, there are provided with a setting operation means I, which operates at the time of writing a code into the memory means B, and a writing means J which writes a code of a key code signal being received from the outside after transmitting a request signal when the setting operation means is being operated. Moreover, when the setting operation means I is being operated, a code of the key code received from an optical key transmitter-receiver Y is written into the key code memory means B, and afterward locking/unlocking is carried out by this optical key transmitter-receiver Y.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a system for communicating by radio waves between a control device for an electric lock installed at or near a door and a portable card-shaped key transmitter/receiver. This invention relates to a radio key system suitable for residential use that locks and unlocks doors.

[Conventional technology]

Conventionally, this type of system transmits a request signal from a control device to a key transmitter/receiver in response to the operation of a lock/unlock button provided on a door, etc., and the key transmitter/receiver that receives the request signal stores it internally. A key code signal based on the key code is sent to the control device, and the control device that receives the key code signal compares the code of the key code signal with the key code stored in the internal non-rewritable ROM. However, there is a known device that generates a signal to lock/unlock an electric lock if the two match.

[Problem that the invention seeks to solve]

As mentioned above, in the conventional system, the key code in the control device is stored in a non-rewritable ROM, which causes various inconveniences.

For example, if the system is applied to a house, key transmitters and receivers will be prepared for each family member, but if even one of them is lost, it will be necessary to replace it. When refilling, the key transceiver must have the same code as the key code in the control device, so the customer's key code must be checked to confirm that the key code of the key transceiver to be refilled matches the key code of the key transceiver to be refilled. This necessitates code management for each code and inventory management for each key code transmitter/receiver code, which poses a problem in that management costs are too high.

The present invention has been made in view of the above-mentioned problems, and by making it possible to arbitrarily set a key code transmitter/receiver that can lock/unlock an electric lock,
The aim is to provide a radio key system that eliminates the need to manage key codes for each customer and key transceiver.

[Means for solving problems]

In order to solve the above-mentioned problems, the radio wave type key system made according to the present invention is as shown in the basic configuration diagram of FIG.
A request code storage means A that stores a request code, a key code storage means B that stores a key code in a rewritable manner, and a request code storage means A that stores a request code in response to the operation of a lock operation button C or an unlock operation button. a request signal transmitting means E that transmits a request signal by radio wave based on a code stored in the request signal transmitting means E, and a code of a key code signal received from the outside after the request signal is transmitted from the request signal transmitting means E, and the key code storage. A control comprising a comparing means F for comparing the key code stored in the means B, and a locking/unlocking signal generating means H for supplying a locking signal or an unlocking signal to the electric lock G according to the output of the comparing means F. It has a device X. The radio key system also uses the control device
The received request signal is compared with the internally stored request code, and if the two match, the key code signal is transmitted via radio waves based on the internally stored key code. It has a portable key transceiver Y for transmitting.

And a set operation means operated when the control device X writes a key code into the key code storage means B! and a writing means J for writing into the key code storage means B the code of the key code signal received from the outside after transmitting the request signal when the set operation means I is operated.

[For production]

With the above configuration, when the set operation means I is operated, the code of the key code signal received from any key transmission/reception (three machines) is written in the key code storage means B,
Thereafter, the electric lock can be locked and unlocked using the arbitrary key transmitter/receiver.

〔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 that is attached to the door frame of a house, for example, and the electric lock 1 has a locking rod 1a and a locking rod 1a. An unlocking solenoid that operates to unlock the rod 1a (not shown)
and a locking motor (not shown) that performs a locking operation. Alternatively, it is an external operation box, and is installed adjacent to the intercom 3 provided near the door. The external operation box 2 is provided with an external lock operation button 2a and an external unlock operation button 2b on its surface, and a lock indicator and an unlock indicator provided inside thereof corresponding to the operation buttons 2a and 2b, respectively. , an antenna for external transmission and reception, an external warning buzzer, and external locking and unlocking switches operated by operation buttons 2a and 2b, respectively. 4 is a control device installed indoors, and its panel surface includes an internal locking operation button 4a, an internal unlocking operation button 4b, a set operation button 4C operated by a key, and a reset operation button 4d.
The interior contains various circuit boards, including internal locking, internal unlocking, and reset switches that correspond to each operation button and operation part, an internal antenna for transmitting and receiving, and an internal buzzer for warning. has been done. The electric lock 1, the operation box 2, and the control device 4 are interconnected via a connector 5. The control device 4 is also supplied with AC 100V power through an AC cord 6.

7 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 l;
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 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 is an output port 0. ~09, input ports 11~i, 3, etc. Output port 0. ~
The unlocking solenoid and locking motor in the electric lock 1, the unlocking indicator and locking indicator of the operation box 2, and internal and external buzzers are connected to 05 through the output circuit 42, and the input ports l+ to ■6 are connected to Input circuit 43
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 connected through the connector. In addition, the input port ■ヮ has a set switch 44 operated by the set operation section 4C, the input port Ill has a reset switch 45 operated by the reset operation button 4d, and the input ports ()It to I, □ have 4 bits. A deep switch 46 is connected to each.

An oscillation circuit 47 and a modulation circuit 48 are connected to the output ports Ob and Ol, respectively, and when the output port 06 becomes H, the oscillation circuit 47 starts oscillating, and the output signal from the oscillation circuit 47 is input as a carrier. The modulation circuit 48 modulates the carrier with the request code signal from the output port O1. 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 demodulating circuit 50 is input to the input capo 113 . The demodulation circuit 50 includes a high frequency amplification circuit 50a, a ceramic filter 50b, and an intermediate frequency amplification circuit (IFAMP) 5.
0c and a comparator 50d.

The base of a switching transistor Q2 whose emitter is connected to ground is connected to the output port 09. The base of a switching transistor Q1 is connected to the collector of the switching transistor Qt. Also connected to the base of the switching transistor Q1 are internal and external locking and unlocking switches and a set switch 44 via diodes D, ~D, and when any of these switches is turned on, the transistor Q
, turns on and supplies +12V power supply voltage to the regulator 51.

The regulator 51 supplies the stabilized power supply voltage to the CPU 41 port. The rising edge of the output is differentiated by the differentiating capacitor C3, and a reset signal generated is supplied to the port R5T to put the CPU 41 into a standby state. Port CL.

And Ct and Z are connected to a crystal oscillator 52 for clock generation.

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 human data that is the code of the received key code signal, and the like. 4 bits are allocated as the request memory area RM, 1-1
The number 5 is stored, and as the code memory area CM,
4 areas CM, ~CM, each storing a 4-digit number
a is assigned.

On the other hand, the key transceiver 7, as shown in FIG. 4, has a CPU 71 that operates according to a predetermined program. CPU71 has output ports 01 to 06 (capo) II
-'I2, etc., the oscillation circuit 72 and the modulation circuit 73 are connected to the output ports 01 and 02, and the output port 04
A ROM 74 in which a request code and a key code are stored is connected to O2 and input port 2. The oscillation circuit 72 starts oscillating when the output port 01 becomes H level, and supplies the oscillation output to the modulation circuit 73 as a carrier. The modulation circuit 73 is the oscillation circuit 7
The carrier from Q2 is modulated by the key code signal from output port 0□ and applied to the base of 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 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 (1+) of the CPU 71. The output of the demodulation circuit 76 is also applied to the control input of the electronic switch SWI, and when the output of the demodulation circuit 76 rises, the electronic switch swl is turned on and the battery 77 is connected to the capacitor c2.
The CPU 71 is connected to the port R3T of the CPU 71 via the CPU 71, thereby resetting the CPU 71 and putting it into a standby state. Output port 03 is used as the control input for the electronic switch SW.
is also connected.

A control terminal of an electronic switch SW that supplies the power supply voltage of the battery 77 to the ROM 74 is connected to the output port 06 .

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

That is, the lock operation button 2a, 4a or the unlock operation button 2b
, 4b is operated and the lock switch or unlock switch is turned on, the transistor Q is turned on, and the power supply voltage stabilized by the regulator 51 is supplied to the boat VDD, and at the same time, a reset signal is applied to the boat R3T. be done. As a result, the CPU 41 enters the standby state, starts executing the flowchart, and outputs the output port 0. is set to H level, turning on transistor Q2. By turning on the transistor Q2, even if the locking switch or the unlocking switch is turned off, the transistor Q1 is kept on, and the port v! Supply of power supply voltage to lfi is maintained.

First, in the first step S1, the set operation section 4c
Based on the state of the input port It, it is determined whether the set switch 44 is on or not.

If this 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 I3. If the determination is YES, step S
3, the output port o6 is set to H level, the oscillation circuit 47 starts oscillating, and the request code is output to the output port 07. This request code is CP
It is stored in the request memory area RM of the internal RAM of U41. As described above, the request code modulates the oscillation output of the oscillation circuit 47 in the modulation circuit 48, and the modulated output is amplified by the amplifier circuit 49 and emitted as a request signal from the internal and external transmitting/receiving antennas.

After that, the process proceeds to step S4, where the inside/outside key transceiver 7
It is determined whether the code of the key code signal received from the key code signal 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, where the output capacitor Ox is set to H level and the door is locked. If the determination in step s4 is No, it is determined that the code signal from the key transmitter/receiver 7 is incorrect, and the flowchart ends.

If the determination in step S2 is No, step S6
The process proceeds to step S7, where it is determined whether or not the external unlock switch has been turned on, and if the determination is YES, the process proceeds to step S7.

In step s7, a request signal is output as in step S3, and then the process proceeds to step S8. In step s8, similarly to step S4, it is determined whether the input code matches the internal code, and if the determination is YES, the door is unlocked in step S9. The determination in step S8 is N.
If o, the execution of the flowchart ends.

When the determination in step S6 is NO, step S
Proceed to IO, where it is determined whether the internal lock switch is on. When the determination of this step SIO is YES, the request signal is not output and the step SIO is
Lock the door.

If the determination in step SIO is NO, step S12
The process proceeds to step S13, where it is determined whether or not the internal unlock switch has been turned on, and if the determination is YES, the door is immediately unlocked in the subsequent step S13. When the determination in step S12 is No, the process returns to step S2, and step S2. S6. S
Until either judgment in S10 or S12 becomes YES,
Repeat these steps.

When the determination in step Sl is YES, that is, when the set switch is turned on by the set operation section 4C of the control device 4, the process advances to step S21, and here, whether the reset switch 45 is turned on by the reset operation button 4d or not. Whether this is the case is determined based on the state of the input port Ig. When the determination in step S21 is YES,
Proceeding to step S22, the internal RAM of the CPU 41 is
Clear all contents of the code memory and request memory storage areas. After step S22 ends, or when the determination in step S21 is NO, the process advances to step S23.

In step S23, it is determined whether the internal lock switch is turned on or not based on the state of the input port ls. When the determination in step S23 is NO, step S
The process advances to step 24, where it is determined whether or not the set switch 44 is on.

When this determination is YES, the process returns to step s1 (FIG. 5(a)). Thereafter, the steps S1 and S21 to S24 described above are repeatedly executed until the determination in step S1 or S24 is NO1 or the determination in step S23 is YES. If the determination in step S23 is NO, the execution of the flowchart is terminated, and if the determination in step S23 is YES.
If so, the process advances to step S25.

In step S25, a request signal is transmitted based on the contents of the request memory area RM of the internal RAM.

Following the transmission of this request signal, it is determined in step S whether or not the key code signal from the key transceiver 7 has been normally received.
The determination is made at step 26.

When the determination in step S26 is YES, the process proceeds to step S27, where the dip switch 46 is set to 15, that is, "111" depending on the state of input capacitors 1q to 112.
1” or not.

This dip switch 46 is used to input 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 if specified. Input that no area CM is specified.

When the determination in step S27 is YES, step 3
Code memory area C that is not vacant in 28 to S31
M is judged in order from the one with the largest number. Step 32
In step S33, it is determined whether the content of the code memory area CM4 is O or not, and if the determination is NO, it is assumed that all the code memory areas CM are not empty, and the contents of the code memory area CM are sequentially shifted in step S33. , the above-mentioned step S2 is stored in the code memory area CM4 which becomes vacant as a result.
The input data determined to have been normally received in step 6 is stored.

If the determination in step 328 is YES, the process proceeds to step S29, where it is determined whether the code memory area CM3 is free. When 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. Step S
When the determination in step S30 is YES, the process advances to step S30.
Here, it is determined whether the code memory area CM2 is empty or not, and when the determination is No, the input data is stored in the code memory area CM3. The determination in step S31 is YES
If so, the process advances to step 531, where it is determined whether the code memory area CMI is free, and when the determination is NO, the process advances to step S36, where the code memory area CMI is empty.
Store input data in M2. Then, step S31
If the determination is YES, the process proceeds to step 332, where the input data is stored in the code memory area CMI, and then the process returns to step S1 (FIG. 5(al)).

When the determination in step 327 is No, that is, when specifying the number of the code memory area CM to be rewritten, the process advances to step S37, where the dip switch 46
is 1, that is, "0001°," and if the determination is YES, the input data is written in the code memory area CMI in step S41.Step S37
When the determination is NO, the process proceeds to step S338, where it is determined whether the dip switch 46 is 2, that is, "001O", and when the determination is YES, the process proceeds to step S4.
2, the manual data is stored in the code memory area CM2.

Also, step S39. Deep switch 4 on S40
It is determined whether 6 is 3 or 4, that is, "0011" or "10100", and if the determination is YES, the input data is stored in the code memory areas CM3 and CM4, respectively, in step 343.S44.The above step 340 ~
After completing S44, return to step Sl (Fig. 5(a))
.

When the determination in step S26 is NO, the process proceeds to step S45, where it is determined whether there is any memory in the request memory area RM. If this determination is YES, the buzzer is turned on in step S46 and the flowchart ends. That is, the determination in step S45 checks whether data cannot be input because the request code of the key transmitter/receiver 7 to be set does not match the request code stored in the request memory area RM. The determination in step S45 is NO.
In this case, it is assumed that there is no request code in the request memory area RM, and the process proceeds to step S47, where 1 is set in the request memory area RM, and a request signal is transmitted in the following step 348 using the set request code.

After transmitting the request signal in step 348, the process advances to step S49, where it is determined whether or not the manual data from the key transmitter/receiver 7 has been normally received. If the determination is YES, the process advances to step S27 (step S49). 5 ((ri), writing to the code memory area CM is performed thereafter. When the determination in step S49 is NO, step S
The process advances to step 50, where the content of the request memory area RM is incremented by 1, and it is determined whether this is 15 or not. Step S50
If the determination is NO, the process returns to step 348, and a request signal is output based on the number in the request memory area RM, which is incremented by 1 here. Thereafter, step S49 or S5
Steps 348 to S50 until the determination of 0 becomes YES.
Repeat. If the determination in step S50 is YES, the buzzer is turned on in step S46 to warn that the key code has not been written normally, and the flowchart ends.

In the above embodiment, the key code is stored by turning on the set switch 44 and the internal locking switch, but a dedicated switch may be provided separately from the internal locking switch.

Further, the number of code memory areas CM may be other than four.

The key transmitter/receiver 7 shown in FIG. 4 receives a request signal from the control device 4 shown in FIG. 3 using a transmitting/receiving antenna, and the CPU 71 detects the reception of the request signal when the input port 1 becomes 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 if the determination is NO, the operation is stopped there. When the determination is YES, the key code is read from the ROM 74, this key code is output from the output port 02, and a key code signal is emitted from the transmitting/receiving antenna 75 based on this key code. After the key code is output from the output port 0□, the CPU 71 stops operating.

In the embodiment described above, if one of the family members loses the key transceiver, he/she can be provided with a key transceiver with a matching request code, and the key code of the new key transceiver can be written into the code memory area. Can be used as a key. When the code memory area prepared in advance is full, the contents of the specified code memory area are rewritten by specifying the code memory area in which the code of the lost key transmitter/receiver is stored using the dip switch 46. be able to.

Further, when the key code is not designated by the dip switch 46, the key code is written in an empty code memory area, and when the key code is stored in all areas, a new code is stored in place of the oldest key code.

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

〔effect〕

As explained above, according to the present invention, when the set operation means is operated, the code of the key code signal received from the outside after transmitting the request signal can be written into the key code storage means. If necessary, such as when the transceiver is lost, a new key code can be set for the transceiver, and the new key transceiver can be used to lock and unlock.

By making it easy for users to write key codes for key transceivers, manufacturers and other supply sides no longer need to manage key codes for each customer and key transceiver, which significantly reduces management costs. Effects such as this can also be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic configuration of a radio key system according to the present invention, FIG. 2 is a perspective view showing a simplified configuration of an embodiment of the system according to the present invention, and FIG. 3 is a control device in FIG. 2. 4 is a circuit diagram showing the circuit configuration of the key transceiver in FIG. 2, and FIGS. 5(a) to (C) are flowcharts showing the operation of the CPU in FIG. 3. It is a diagram. X...control device, Y...key transmitter/receiver, A...request code storage means, B...key code storage means, C...lock operation button, D...unlock operation button, E...
Request signal transmitting means, F... Comparison means, G...
Electric lock, H...locking/unlocking signal generation means, I...gate operation means, J...writing means. Patent applicant: Kokusan Metal Industry Co., Ltd. fO) (C) Figure 5

Claims (1)

[Claims] A request code storage means that stores a request code, a key code storage means that stores a key code in a rewritable manner, and a request code that is stored in the request code storage means according to the operation of a lock operation button or an unlock operation button. request signal transmitting means for transmitting a request signal via radio waves based on the code; a code of a key code signal received from the outside after transmitting the request signal from the request signal transmitting means; and a key code stored in the key code storage means. a control device comprising a comparison means for comparing the two values, and a locking/unlocking signal generation means for supplying a locking signal or an unlocking signal to an electric lock according to the output of the comparing means, and a control device that receives a request signal from the control device. A portable key transmitter/receiver that compares the received request signal with an internally stored request code, and transmits a key code signal via radio waves based on the internally stored key code if the two match. In the radio-controlled key system, the control device includes a set operating means that is operated when writing a key code in the key code storage means; A radio wave type key system, further comprising writing means for writing a code of a key code signal received from the key code storage means into the key code storage means.