JP3481835B2 - Non-contact type lock control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ID code transmitted from a portable transmitting means such as a card and a preset I code.
A non-contact type lock control device for controlling a locking / unlocking device of a lock when collating with a D code and detecting a match, by transmitting an induced radio wave when a portable transmission means is detected by a proximity sensor. The present invention relates to a non-contact type lock control device that induces transmission of an ID code to a portable transmission means.

[0002]

2. Description of the Related Art Conventionally, this type of lock control device has been used, for example, in a door lock for a house, and a card having a transmitting / receiving function is used as a portable transmitting means for transmitting an ID code. Further, the lock control device includes a proximity sensor that detects a proximity object by infrared rays or the like, and when the user brings the card close to the proximity sensor, the proximity sensor detects the card. When the card is detected, the lock control device sends out an induced electromagnetic wave, and the card receives the induced electromagnetic wave and operates to transmit an ID code. Thus, the lock control device receives the ID code and collates it with a preset ID code. When the ID code matches, the lock control device controls the locking / unlocking device to unlock the lock when it is in the locked state.

As described above, the card can be unlocked in a non-contact manner only by bringing it close to the proximity sensor, and thus the operation is simple. Moreover, since it is not necessary to input the ID code with a ten-key or the like, a mechanical lock or a ten-key using the key It is superior in anti-theft property as compared with the PIN-type locks using the above.

By the way, according to the conventional non-contact type lock control device as described above, since the induced radio wave is sent to the card to operate the card only when the card is detected by the proximity sensor, the induced radio wave is generated. Although the power consumption is lower than that in the case where the card is constantly sent, there is a problem that the power is wasted by that amount when the proximity sensor for detecting the card is constantly operated.
Therefore, it has been proposed to intermittently operate the proximity sensor in order to further save power. For example, JP-A-5-3
Japanese Patent No. 47573 proposes a microwave proximity sensor which transmits and receives microwaves intermittently and transmits and receives when a reflected wave from a card (contactless IC card) is detected. ing.

[0005]

However, in the case of using the proximity sensor like the above-mentioned conventional lock control device, some object is placed close to the proximity sensor, or the sensing window of the proximity sensor is covered by mischief or the like. Then, the lock control device determines that it is detecting the card and performs the induced radio wave transmission, the ID code reception operation, and the like, which causes a problem of power consumption. In particular, when a door lock for a house is provided with the above lock control device, wiring work is required when using a household power source, and thus it is suitable to use a battery as a power source. Therefore, it is extremely useful to reduce the power consumption in order to extend the battery life.

The present invention is a non-contact type lock control which induces the transmission of the ID code to the portable transmitting means by transmitting the induced radio wave when the portable transmitting means is detected by the proximity sensor. An object is to reduce power consumption in a device.

[0007]

A non-contact type lock control device according to claim 1 of the present invention, which has been made to solve the above-mentioned problems, intermittently operates a proximity sensor to detect a proximity object and to detect the proximity. When an object is detected, an induced radio wave is transmitted to induce the transmission of the ID code to the portable transmission means, the ID code is received, and when the received ID code matches the preset ID code. A non-contact type lock control device for controlling a locking / unlocking device of a lock, wherein when a proximity object is continuously detected for a predetermined time by the proximity sensor in a state where the ID codes do not match, It is characterized in that the interval of the intermittent operation of the sensor is set to be long.

According to the non-contact type lock control device of the first aspect of the present invention configured as described above, even if the proximity sensor continuously detects the proximity object, if the ID code does not match, a predetermined time elapses. The interval of the intermittent operation of the proximity sensor is set to be long. Therefore, when an object is placed close to the proximity sensor or the sensing window of the proximity sensor is covered by mischief or the like, the ID code is not received and naturally does not match. It becomes longer and consumes less power than usual.

When the proximity sensor continuously detects the proximity object in a state where the ID codes do not match, the intermittent operation is set in the proximity sensor each time a predetermined time elapses. By gradually increasing the interval of, when a nearby object is detected for a long time,
It also saves power.

Further, as in claim 3, when the function of the proximity sensor is stopped for a certain period of time when the ID codes do not match for a predetermined number of times in succession, power saving is achieved as in claim 1. In addition, even if you try to unlock a plurality of unauthorized cards intermittently, if the ID code does not match a certain number of times, the function of the proximity sensor is stopped for a certain period of time.
Security function is enhanced.

A timer may be used to detect the lapse of the predetermined time, but as in claim 4, the lapse of the predetermined time is determined by the number of times the proximity sensor continuously detects a proximity object. It does not require a dedicated timer in this case.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 is a block diagram of an electronic lock system using a lock control device according to an embodiment of the present invention, FIG. 2 is a flow chart of the first embodiment, FIG. 3 is a flow chart of the second embodiment, and FIG. 4 is a third embodiment. Flow chart of the
FIG. 5 is a perspective view showing the outer appearance of the lock control device in the electronic lock system of the embodiment, and FIG. 6 is a vertical sectional view of the lock control device.
The first embodiment to the third embodiment are different only in the control operation of the CPU, which will be described later, but the configurations of the respective parts shown in FIGS. 1, 5 and 6 are the same.

This electronic lock system comprises a lock control device 1 fixed to the door D, a box lock 2 fitted in the end face of the door D, and a card 3 as a portable transmission means. The lock control device 1 includes a locking / unlocking device 1 connected to a handle 11.
The lock / unlock device 10 is electrically operated to connect and disconnect the dead bolt 22 of the box lock 2 and the handle 11.

Under the control of a control unit 20 which will be described later, inside the lock control device 1, the handle 11 and the dead bolt 22 are connected when the unlocked state is set, and when the locked state is set, the dead bolt 22 is connected. Handle 11 and dead bolt 22
And are separated. That is, in the unlocked state,
By rotating the handle 11, the latch bolt 21 and the dead bolt 22 can be retracted. In the locked state, even if the handle 11 is rotated, the dead bolt 22 cannot be retracted and the locked state is maintained. To be done.

The dead bolt 22 of the box lock 2 is projected and retracted by a turning operation of a knob (not shown) provided inside the door D. Further, the lock control device 1 is provided with a cylinder lock 13 arranged inside the cylinder lock cover 12, and the dead bolt 22 can be operated by rotating the cylinder lock 13 with a key.

In the lock control device 1, a circuit board 15 is provided on the upper inside of the outer cover 14, and the circuit board 15 is provided.
The controller 20, the transmitter / receiver 30, the antenna 40, the sensor drive circuit 50, and the infrared sensor 60 shown in FIG. The infrared sensor 60 faces the sensing window 16 formed on the front surface of the outer cover 14. Further, a battery case 17 is formed at the lower end of the outer cover 14, and each unit on the circuit board 15 operates using the dry battery housed in the battery case 17 as a power source.

As shown in FIG. 1, the control unit 20 is a CPU.
20a, ROM 20b, RAM 20c, timer 20d,
The I / O 20 is composed of a microcomputer having an I / O 20e, and the CPU 20a performs a control operation using a working area of the RAM 20c based on a control program stored in the ROM 20b, which will be described later.
The transmission / reception unit 30, the sensor drive circuit 50, and the locking / unlocking device 10 are controlled via e.

Specifically, a command signal is output to the sensor driving circuit 50 to detect the card 3 by the infrared sensor 60, and when the card 3 is detected, the transmitting / receiving unit 30 is controlled and the antenna 40 is used. The induction wave for supplying power to the card 3 is transmitted, and the transmitting / receiving unit 30 receives the ID code from the card 3 via the antenna 40. Then, when the received ID code matches the ID code stored in the RAM 20c in advance, the locking / unlocking device 10
Is operated to bring the handle 11 and the dead bolt 22 into a connected state, and the box lock 2 is unlocked.

The infrared sensor 60 is the outer cover 1
When infrared rays are radiated through the sensing window 16 formed in the sensor 4 and infrared reflected light from a near object (card 3 or the like) near the sensing window 16 (for example, a range of about 10 cm) is received, the sensor drive circuit 50 Output a signal to
The control unit 20 (CPU 20a) detects a proximity object via the sensor drive circuit 50.

The card 3 operates with a receiving circuit 31 including a coil 31a which receives an induced radio wave from the transmitting / receiving section 30 and the antenna 40 and also serves as a transmitting antenna, and a voltage induced by the receiving circuit 31. IC circuit 3
2 and. The IC circuit 32 stores an ID code preset for this card 3, and
Send the D code. The same ID code as the ID code stored in the IC circuit 32 is set in the control unit 20. Transmission / reception between the antenna 40 and the card 3 is set within a range of about 10 cm from the antenna 40.

Next, the operation of the first embodiment will be described with reference to FIG. This first embodiment is usually an infrared sensor 60.
The proximity object is detected every 1 second, and when the proximity object is detected a predetermined number of times (5 times in this example), the "prank alert mode" is set. In the "prank alert mode", the above detection operation is performed every 1 minute. Is what you do. That is, the interval of the intermittent operation of the infrared sensor 60 is set to 1 second when the "prank alert mode" is not set and is set to 1 minute when the "prank alert mode" is set. Whether or not it is the "prank alert mode" is stored by the flag set in the RAM 20c, and the mode is determined by referring to this. A counter (A) for counting the number of detections is set in the RAM 20c. Further, in the initial state, the interval of the intermittent operation of the infrared sensor 60 is set to 1 second.

First, the CPU 20a drives the infrared sensor 60 by the sensor drive circuit 50 in step S1 to perform a sensor operation, and determines in step S2 whether or not a near object is detected. If no near object is detected, step S
Infrared sensor 6 by releasing the "prank alert mode" in 3
The intermittent operation interval of 0 is set to 1 second, the counter (A) is cleared (set to "0") in step S4, and the process proceeds to step S12. In step S12, the time is counted based on the timer 20d for the set interval of the intermittent operation. When the time is counted up, the process returns to step S1 to perform the sensor operation.

By the above processing, if no proximity object (card 3, other obstacle, etc.) is detected by the sensor operation, step S1 → step S2 → step S3 → step S
Since the operation of 4 → step S12 → step S1 is repeated, the “prank alert mode” is in the released state and the counter (A) is cleared. That is, the operation of the normal standby state is performed in which the unlocking operation by the card 3 is not performed and the mischief is not performed.

On the other hand, if a proximity object is detected in step S2, it is determined in step S5 whether it is the "prank alert mode". If it is the "prank alert mode", the process proceeds to step S9 and the "prank alert mode". If not, the counter (A) is incremented by "1" in step S6, and it is determined in step S7 whether the value of the counter (A) has become "5". If not "5", step S9
If it is "5", the "prank alert mode" is set in step S8 to set the intermittent operation interval of the infrared sensor 60 to 1 minute, and the process proceeds to step S9.

In step S9, the transmitter / receiver 30 and the antenna 40 transmit the induced radio waves and receive the ID code (RF-ID communication), and in step S10, the received ID code matches the set ID code. If they do not match, the process proceeds to step S12, and if they do match, the locking / unlocking device 10 is controlled in step S11 and the process proceeds to step S12. Note that step S11
In the control of the locking / unlocking device 10, the unlocking operation is performed when the box lock 2 is in the locked state, and the locking operation is performed in the unlocked state. Then, in step S12, the time is counted for the interval at which the intermittent operation is set in the same manner as described above, and when the time is counted up, the process returns to step S1 to perform the sensor operation.

By the above processing, if a proximity object or the like is detected five times in a row by the sensor operation, the "prank warning mode" is set and the interval of the intermittent operation of the infrared sensor 60 is 1.
Extends from 1 second to 1 minute. For example, when the sensing window 16 is blocked due to mischief or the like, the detection window 16 is detected five times in a row, and thus the "prank alert mode" is entered, and then the detection state continues until the sensing window 16 is restored. ID
Since no code match is obtained, step S1 → step S2 → step S5 → step S9 → step S10
→ Step S12 → The loop of step S1 is repeated at 1 minute intervals. If the sensing window 16 is restored, step S
In 1 and step S2, no proximity object is detected,
Immediately in step S3, the "prank alert mode" is released and the intermittent operation interval is set to 1 second.

Next, the operation of the second embodiment will be described with reference to FIG. This second embodiment is "prank alert mode I"
And there are two modes of "prank alert mode II",
The interval of the intermittent operation of the infrared sensor 60 is set to 1 second when it is not in the "prank alert mode" (when it is neither "prank alert mode I" nor "prank alert mode II"), and is set in the "prank alert mode I". The time is set to 1 minute, and further set to 10 minutes in the "prank alert mode II".

In FIG. 3, steps designated by the same reference numerals as those in FIG. 2 are the same processes as those in the first embodiment, and like the first embodiment, steps S1 → S2 → step S3 → step S4 → step S12 → step S1. By repeating the above operation, the operation in the normal standby state is performed.

On the other hand, if a near object is detected in step S2, it is determined in step S5 'whether it is "prank warning mode II". If it is "prank warning mode II", the process proceeds to step S9 and "prank". If it is not "warning mode II", the counter (A) is incremented by "1" in step S6, and it is determined in step S7-1 whether the value of the counter (A) is "10". If it is "10", the process proceeds to step S8-2, and if it is not "10", the process proceeds to step S7-2.

In step S7-2, it is determined whether or not the value of the counter (A) is "5". If it is not "5", the process proceeds to step S9, and if it is "5", the step S8 is performed. -1 is set to "prank alert mode I" to set the intermittent operation interval of the infrared sensor 60 to 1 minute, and the process proceeds to step S9. If the value of the counter (A) is "10" in step S7-1, step S8-
In step 2, the "mischievous alert mode II" is set to set the intermittent operation interval of the infrared sensor 60 to 10 minutes, and the process proceeds to step S9.

By the above processing, when the sensing window 16 is blocked by a mischief or the like, if a proximity object or the like is detected five times in succession by the sensor operation, the "prank warning mode I" is set and the operation is intermittently performed. The action interval is extended to 1 minute,
Furthermore, if it is detected five times in succession at 1-minute intervals, it is set to "prank alert mode II", and the interval of intermittent operation is extended to 10 minutes. When the sensing window 16 is restored, the "prank warning mode" is immediately released in step S3 as in the first embodiment, and the intermittent operation interval is set to 1 second. In the second embodiment as well, the RF-ID communication, the ID code collation and the control of the locking / unlocking device 10 are performed in the processes of steps S9, S10 and S11 as in the first embodiment.

In the second embodiment, the operation of extending the interval of the intermittent operation is performed only twice, from 1 second to 1 minute, and from 1 minute to 10 minutes, but it is extended more than once. You may make it operate | move.

Next, the operation of the third embodiment will be described with reference to FIG. In the third embodiment, the processing when the ID codes do not match is added to the operation of the first embodiment.
2, the same processes as those in the first embodiment are designated by the same reference numerals as those in FIG. 2, and detailed description thereof will be omitted. In the third embodiment, when the number of times the ID codes do not match reaches a predetermined number, the function of the lock control device 1 itself is stopped for a certain period of time.
A counter (B) that is reset in the initial state is used to count the number of mismatches.

That is, if the ID codes match in step S10, the locking / unlocking device 10 is controlled in step S11 as in the first embodiment, the counter (B) is cleared in step S11 ', and the process proceeds to step S12. . If the ID codes do not match in step S10, step S
The counter (B) is incremented by "1" at 13 and it is determined at step S14 whether the value of the counter (B) becomes "5". If not "5", step S1
If it is "5", the function is stopped for 5 minutes by waiting for 5 minutes in step S15, and if 5 minutes have passed, the process proceeds to step S12.

With the above processing, as in the first embodiment,
If a proximity object or the like is detected five consecutive times by the sensor operation, the interval of the intermittent operation is extended from 1 second to 1 minute. Also,
For example, when a plurality of unauthorized cards are sequentially replaced and an unlocking operation is performed, the function is stopped when a mismatch is detected five times, so that the crime prevention function is enhanced. In addition, the judgment reference number of times of non-coincidence detection (five times in the above example) as a condition for stopping the function is taken into consideration in consideration of the reliability of RF-ID communication, etc. You can set a large number and set a small number if an error is unlikely to occur.

The determination reference number of detection times (5 times in the first and third embodiments, 5 and 10 times in the second embodiment) as a condition for extending the interval of the intermittent operation is each embodiment. It is not limited to. Further, in the above-mentioned embodiment, the intervals of the intermittent operation are 1 second, 1 minute and 10 minutes, but other intervals may be set.

Further, in each of the above-described embodiments, the elapse of the predetermined time in which the proximity object is continuously detected is determined by the number of detections using the counter (A). You may make it time by.

Further, although the locking / unlocking device of the above embodiment is described as electrically switching the connection state between the handle and the latch bolt, the locking / unlocking device controls at least the locked state and the unlocked state of the lock. Any configuration may be used as long as it can be switched by an electric signal output by the unit.

Further, in the above-mentioned embodiment, the case where the card is used as the portable transmitting means has been described. However, the portable transmitting means uses the ID by receiving the induced wave.
It may be portable as long as it transmits the code.

In the above embodiment, the case where the infrared sensor is used as the proximity sensor has been described, but other proximity sensors may be used.

[0041]

As described above, according to the first aspect of the present invention.
According to the non-contact type lock control device, if some object is placed close to the proximity sensor or if the sensing window of the proximity sensor is covered by mischief or the like, the interval of the intermittent operation of the proximity sensor becomes long, Power consumption can be reduced.

Further, according to the non-contact type lock control device of the second aspect of the present invention, when the proximity object is continuously detected by the proximity sensor, the interval of the intermittent operation is set every predetermined time. Since the length is gradually increased, the power consumption can be further reduced.

Further, according to the non-contact type lock control device of the third aspect of the present invention, the function of the proximity sensor is stopped for a certain period of time when the ID codes do not match a predetermined number of times in succession. The power is reduced and the crime prevention function is enhanced.

Further, according to the non-contact type lock control device of the fourth aspect of the present invention, the proximity sensor continuously detects the proximity object for a predetermined time as a condition for extending the interval of the intermittent operation. Since it is judged by the number of times, no dedicated timer is required.

[Brief description of drawings]

FIG. 1 is a block diagram of an electronic lock system using a lock control device according to an embodiment of the present invention.

FIG. 2 is a flowchart of the first embodiment.

FIG. 3 is a flowchart of a second embodiment.

FIG. 4 is a flowchart of a third embodiment.

FIG. 5 is a perspective view showing an appearance of a lock control device in the electronic lock system according to the embodiment.

FIG. 6 is a vertical cross-sectional view of the lock control device according to the embodiment.

[Explanation of symbols]

1 lock control device 2 box locks 3 cards 10 Locking and unlocking device 20 Control unit 30 transceiver 40 antenna 50 sensor drive circuit 60 infrared sensor

Continuation of the front page (56) Reference JP-A-7-189538 (JP, A) Actual development 3-2161 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E05B 49 / 00-49/04 G06K 7/00 H04B 5/02 E05F 15/00-15/20

Claims (4)

(57) [Claims] 1. A proximity sensor is intermittently operated to detect a proximity object, and when the proximity object is detected, an induced radio wave is transmitted to induce transmission of an ID code to a portable transmission means, and an ID code is transmitted. Is a non-contact type lock control device that controls the locking / unlocking device of the lock when the received ID code and the preset ID code match with each other. A non-contact type lock control device, wherein when the proximity sensor detects a proximity object continuously for a predetermined time, the interval of the intermittent operation of the proximity sensor is set to be long. 2. When the proximity object is continuously detected by the proximity sensor in a state where the ID codes do not match, the intermittent operation interval set in the proximity sensor is set every time a predetermined time elapses. The non-contact type lock control device according to claim 1, wherein the lock control device is long. 3. The non-contact type lock control according to claim 1, wherein the function of the proximity sensor is stopped for a certain period of time when the ID codes do not match a predetermined number of times in succession. apparatus. 4. The non-contact type according to claim 1, wherein the lapse of the predetermined time is determined by the number of times the proximity sensor continuously detects a proximity object. Lock control device.