JP6146557B2 - Electric lock system - Google Patents

Description

  The present invention relates to an electric lock system that supplies driving power to an electric lock by non-contact energization.

  In recent years, in order to introduce a security system in an apartment house or a business facility, an example of installing an electric lock on a movable building material such as a door is increasing. Conventionally, in order to supply driving power to an electric lock provided on a movable building material, for example, an electric wire is arranged on the movable building material side from a fixed structure side such as a wall or a frame through a hinge portion. However, with the opening and closing of the movable building material, twisting of the electric wires, contact friction with peripheral members, and the like occur, and the electric wires may be short-circuited or disconnected due to continuous use. Then, supplying electric power to the movable building material side using a non-contact electric power feeder is proposed (refer patent document 1).

  The non-contact power supply device generally uses an electromagnetic induction method, and a resonance type switching power supply or the like is used. More specifically, the power supply unit is provided on the fixed structure side and receives power supply from a commercial power source, and the power reception unit is provided on the movable building material side. The power supply unit includes a high-frequency inverter circuit that converts AC power into DC power and oscillates DC power at a predetermined frequency, a primary coil of a magnetic transformer, a ferrite core, and the like. The power receiving unit includes a secondary coil and a ferrite core of a magnetic transformer, and a rectification / smoothing circuit that rectifies AC power induced in the secondary coil.

JP 2009-55745 A

  For example, an electric toothbrush or a shaver is known as an electric device using a non-contact power supply device, and these are charged in a secondary battery using the non-contact power supply device while being attached to a predetermined charger. Is done. Therefore, the positional accuracy of the primary side coil provided on the charger side and the secondary side coil provided on the electric toothbrush or shaver is considerably high. In contrast, when a non-contact power supply device is attached to a movable building material such as a door, the power receiving unit provided on the movable building material side is often installed at the factory shipment, whereas the power supply unit provided on the fixed structure side Is installed by the construction worker so as to face the power receiving unit on the movable building material side. Therefore, the positional error in the vertical direction of the power supply unit and the power receiving unit and the variation in the gap in the horizontal direction are considerably large. The ferrite cores on the power supply unit side and the power reception unit side are made large enough to allow the above-mentioned positional error and gap variation beyond the actual required dimensions, and the power supply unit and power reception unit are enlarged. And increase the cost.

  In addition, the locking and unlocking of the electric lock is always performed with the door closed, that is, with the power supply unit and the power receiving unit facing each other, but an actuator such as a motor or an electromagnet is used to lock or unlock the electric lock. When driving the actuator, a large amount of power (for example, about 10 W) is temporarily required. On the other hand, after the electric lock is locked or unlocked, the amount of power required is small, such as confirmation operation of locking or unlocking by the microcomputer and lighting of the LED for displaying that the electric lock is locked or unlocked. Become. In general households, locking and unlocking of electric locks are at most several times to several tens of times per day, and the non-contact power feeding device is used for supplying standby power most of the day. The current situation is.

  Furthermore, since the power feeding unit and the power receiving unit constituting the non-contact power feeding device correspond to the primary side and the secondary side of the transformer, the non-contact power feeding device can be regarded as an open-gap switching power source, and the radiation noise is very high. large. Therefore, in particular, the power supply unit is provided with a noise filter circuit using a large-capacity capacitor (capacitor), a large coil and a ferrite core (inductor), and the power supply unit is increased in size and cost.

  Furthermore, since power is not supplied to the electric lock from the non-contact power supply device when the commercial power supply is interrupted, automatic unlocking may be forced for safety reasons, resulting in a security problem. In addition, even when the door is open, power is not supplied from the non-contact power supply device to the electric lock, so that an authentication system using the electric lock and other functions such as LF band radio cannot be used.

  The present invention has been made in order to solve the above-described problems of the conventional example, and can supply power even when a power failure occurs or when the door is open, and also constitutes a non-contact power supply device. An object of the present invention is to provide an electric lock system in which the power receiving unit can be reduced in size and cost.

In order to achieve the above object, an electric lock system according to the present invention includes a power supply unit provided on the fixed structure side and a power reception unit provided on the movable building material side, and supplies power from the power supply unit to the power reception unit by electromagnetic induction. A contactless power feeding device,
An electric lock provided on the movable building material side;
An electricity storage element that is provided on the movable building material side, is charged by power output from the power receiving unit, and supplies driving power to the electric lock;
The power receiving unit includes a charging circuit for the storage element,
An authentication system using LF band radio,
With human body sensor
The power receiving unit compares a charging voltage detection circuit that detects a charging voltage of the storage element, a charging voltage of the storage element, a first threshold value of a predetermined voltage, and a second threshold value that is lower than the first threshold value. The charging of the storage element is started when the charging voltage of the storage element becomes less than the second threshold, and the charging of the storage element is started when the charging voltage of the storage element becomes equal to or higher than the first threshold. The charging control circuit further includes a charge control circuit for stopping the power supply unit so that power is supplied from the power feeding unit to the power receiving unit only when the power storage element is charged, and the power receiving unit supplies the power to the power receiving unit. Insufficient to drive the lock, but sufficient power is supplied to charge the storage element,
When the movable building material is opened, an alarm sound is output when an authentication signal is not output from the authentication system even though the human body detection sensor detects a person.

When the movable building material is opened, if the human body sensor senses a person and an authentication signal is output from the authentication system, it is preferable to output a sound different from the alarm sound .

According to such a configuration, when the movable building material (door) is opened, an alarm can be sounded if a person who does not have the authentication remote control key attempts to enter the room.

The figure which shows the example of 1 structure of the electric lock system which concerns on one Embodiment of this invention. The figure which shows the other structural example of the electric lock system which concerns on one Embodiment of this invention. The block block diagram of an electric lock system and its non-contact electric power feeder. The figure which shows the relationship between the charging voltage of an electrical storage element, and the threshold value which manages charge start and stop. The figure which shows the relationship between the electric energy consumption in the locking / unlocking operation | movement of an electric lock, and the electric energy for charging to an electrical storage element.

  An electric lock system according to an embodiment of the present invention will be described. FIG. 1 shows a configuration example in which this electric lock system is applied to an open / close door rotatably supported by a hinge, and FIG. 2 shows a configuration example in which this electric lock system is applied to a sliding door.

  In FIG. 1 or FIG. 2, the non-contact power feeding device 8 includes a power feeding unit 10 and a power receiving unit 20, and the power feeding unit 10 is provided on the side of the frame 1 that is a fixed structure, and the power receiving unit 20 is a movable building material (door). It is provided on the second side so as to face the power supply unit 10. The movable building material 2 includes an electric lock 3, an electric lock control unit 4 that controls the locking and unlocking of the electric lock 3, a power storage element 5 such as a lithium ion secondary battery, and a solar cell panel (self-generating element). 6 etc. are provided. In FIG. 1, the power feeding unit 10 and the power receiving unit 20 are provided on the hinge 7 side. However, in the electric lock system according to this embodiment, the non-contact power feeding device 8 is used. It is also possible to provide the power feeding unit 10 and the power receiving unit 20.

  FIG. 3 shows a block configuration of the electric lock system and its non-contact power feeding device 8. As described above, the non-contact power feeding device 8 includes the power feeding unit 10 and the power receiving unit 20. The power feeding unit 10 corresponds to, for example, the primary side (input side) of the resonant switching power supply, and the power receiving unit 20 is the secondary side. It corresponds to (output side). The power supply unit 10 is connected to a commercial power source 9 and receives, for example, AC power of 50 Hz or 60 Hz. The power supply unit 10 includes a noise filter circuit 11, a high frequency inverter circuit 12, a primary coil 13 of a magnetic transformer, and the like. The noise filter circuit 11 includes, for example, a thermistor element that reduces inrush current when power is turned on, a surge absorbing element (varistor), and an LC filter circuit element that reduces noise voltage. The high-frequency inverter circuit 12 includes a rectification / smoothing circuit that converts input AC power into DC power, and an oscillation circuit that oscillates DC power at a predetermined frequency. The type of the high-frequency inverter circuit 12 is not particularly limited, and an inverter circuit such as a push-pull type, a half bridge type, or a full bridge type can be used. The power receiving unit 20 includes a secondary coil 21 of a magnetic transformer, a rectification / smoothing circuit 22 including a diode bridge and a smoothing capacitor, a charging circuit 23, a charging voltage detection circuit 24, a charging control circuit 25, and the like. . Although not shown, a voltage stabilizing element such as a regulator may be further provided.

  The primary coil 13 on the power supply unit 10 side and its ferrite core (not shown) are disposed inside the surface 10 b facing the power receiving unit 20 in the housing 10 a (see FIG. 1) of the power supply unit 10. Further, the secondary coil 21 on the power reception unit 20 side and its ferrite core (not shown) are arranged inside the surface 20 b facing the power supply unit 10 in the housing 20 a of the power reception unit 20. Therefore, for example, as shown in FIG. 1, in a state where the movable building material (door) 2 is closed, the primary coil 13 on the power supply unit 10 side and the secondary coil 21 on the power reception unit 20 side face each other, and the non-contact power supply device 8 magnetic transformers are configured. Further, for example, a light emitting element or a light receiving element constituting a photocoupler (PC) 30 is provided on a surface 10 b of the casing 10 a of the power supply unit 10 facing the power receiving unit 20. A light receiving element or a light emitting element constituting the photocoupler 30 is provided on the surface 20 b facing the power supply unit 10. The photocoupler 30 is connected between the charging control circuit 25 of the power receiving unit 20 and the high-frequency inverter circuit 12. As will be described later, when a predetermined signal is input from the charge control circuit 25 to the high-frequency inverter circuit 12 via the photocoupler 30 or when it is not input, the high-frequency inverter circuit 12 performs an oscillation operation.

  The charging circuit 23 is connected to the rectifying / smoothing circuit 22 and the solar cell panel 6, and the storage element 5 using DC power output from the rectifying / smoothing circuit 22 or the solar cell panel 6 as necessary. To charge. The charging voltage detection circuit 24 detects the charging voltage of the storage element 5 and inputs a detection signal to the charging control circuit 25. The charge control circuit 25 is configured by, for example, a microcomputer and a memory, and the first threshold value of a predetermined voltage to be compared with the charging voltage of the storage element 5 and the second threshold value lower than the first threshold value are stored in the memory in advance. Has been. As shown in FIG. 4, the charge control circuit 25 compares the charging voltage of the power storage device 5 with the first threshold value and the second threshold value, and when the charge voltage is in a low voltage state less than the second threshold value, the power storage device 5 is started, and charging of the electric storage element 5 is stopped when the charging voltage becomes a high voltage state equal to or higher than the first threshold. That is, the charge control circuit 25 functions so as to always maintain the charging voltage of the storage element 5 within a certain range. The same applies when the charging voltage of the electricity storage element 5 is in a low voltage state lower than the second threshold value during the locking / unlocking operation.

  Here, when the power storage element 5 is charged with DC power from the solar cell panel 6 and when the power storage element 5 is not charged, the oscillation operation by the high-frequency inverter circuit 12 is not necessary. In other words, when the oscillation operation by the high-frequency inverter circuit 12 is performed, DC power is not output from the solar cell panel 6 or is insufficient, and the charging voltage of the storage element 5 is reduced. It is. Therefore, the charging control circuit 25 inputs a predetermined signal to the high frequency inverter circuit 12 via the photocoupler 30 only when the oscillation operation by the high frequency inverter circuit 12 is performed. Alternatively, when the oscillation operation by the high frequency inverter circuit 12 is not performed, a predetermined signal may be input to the high frequency inverter circuit 12 from the charge control circuit 25 via the photocoupler 30. In this way, by suppressing the oscillation of the high-frequency inverter circuit 12 to the minimum necessary, the power consumption of the commercial power supply 9 can be reduced and the spatial noise radiation from the non-contact power feeding device 8 can be suppressed.

  In this embodiment, since the storage element 5 can be charged also by DC power from the solar battery panel 6, the charge control circuit 25 functions as an overcharge prevention circuit and controls the start and stop of the charging circuit 23. To do. When the solar cell panel 6 is not provided, the charging circuit 23 is always in a chargeable state, and the charging control circuit 25 oscillates the high-frequency inverter circuit 12 only when the storage element 5 is charged. 12 may be configured to be controlled.

  Next, FIG. 5 shows the relationship between the amount of power consumed in the locking / unlocking operation of the electric lock 3 and the amount of power charged in the storage element 5. In FIG. 5, the solid line represents a rough temporal change in the amount of power consumed by the electric lock 3 and the electric lock control unit 4, and the alternate long and short dash line represents the charging power consumed by the non-contact power feeding device 8 to charge the storage element 5. Represents a rough change in quantity over time. It is assumed that the standby power amount by the electric lock control unit 4 or the like is constant. When locking or unlocking the electric lock 3, an actuator such as a motor or an electromagnet for driving the electric lock is driven. A large current flows for a short time by driving the actuator, and the load becomes maximum. On the other hand, after the electric lock 3 is locked or unlocked, an operation for confirming the locking or unlocking by the microcomputer of the electric lock control unit 4 and lighting of an LED for displaying that the electric lock is locked or unlocked. , Less power is required.

  In the electric lock system according to the present embodiment, power is supplied to the electric lock 3 and the electric lock control unit 4 by the electric storage element 5, and the electric discharge from the electric storage element 5 is performed according to the locking / unlocking operation of the electric lock 3. The amount varies. However, the non-contact power feeding device 8 is used only for charging the power storage element 5 and does not directly supply power to the electric lock 3 and the electric lock control unit 4. Therefore, the amount of charging power consumed by the non-contact power feeding device 8 for charging the power storage element 5 is substantially constant. Further, the amount of power consumed by the non-contact power feeding device 8, that is, the power supplied from the power feeding unit 10 to the power receiving unit 20 is insufficient to drive the electric lock 3, but charges the power storage element 5. It is sufficient if the power is sufficient.

  As described above, the power supplied from the power supply unit 10 to the power receiving unit 20 is much smaller than that of the conventional electric lock system, and the primary coil 13 of the power supply unit 10 and its ferrite core and the power receiving unit 20 The secondary coil 21 and its ferrite core need only be smaller than the conventional one. Along with the power saving, radiation noise emitted from the non-contact power supply device 8 is reduced, so that the noise filter circuit 11 can be downsized. As a result, the power feeding unit 10 and the power receiving unit 20 constituting the non-contact power feeding device 8 can also be reduced in size and cost.

  Furthermore, since the electric storage element 5 is provided on the movable building material 2 side, it is not necessary to unlock the electric lock 3 immediately even when the commercial power source 9 fails. That is, it is possible to prevent an intruder from entering the automatic unlocking at the time of a power failure. Furthermore, if the solar cell panel 6 can generate power, the function of the electric lock 3 can be maintained even when the commercial power source 9 continues to be out of power for a long time. Furthermore, in recent years, an authentication system using an LF band radio and an electric lock system are combined, and the user who owns the authentication remote control key automatically unlocks the electric lock only when the user approaches the predetermined range from the movable building material 2. It has been proposed. By further applying this system, when a movable building material (door) 2 is opened, an alarm can be sounded if a person who does not have an authentication remote control key attempts to enter the room. For example, when an authentication signal is not output from the authentication system even though the human body sensor detects a person, a suspicious person may be trying to enter, so an alarm sound is output. Conversely, when the human body sensor senses a person and an authentication signal is output from the authentication system, it can be estimated that the person concerned is about to enter the room, so it is only necessary to output a sound different from the alarm sound. In this case, even when the door is opened, power can be supplied from the power storage element 5 to other functions such as an authentication system.

  As another application example, the charge control circuit 25 can detect aged deterioration, permanent abnormality, and temporary charging abnormality of the electricity storage element 5. In general, since it is known that there is a limit to the number of times that the secondary battery can be charged and discharged, for example, the charging control circuit 25 counts the number of times that the storage element 5 is charged and discharged based on the number of times the charging circuit 23 is activated. can do. Alternatively, since the charging voltage detection circuit 24 constantly monitors the charging voltage of the storage element 5, the charging control circuit 25 determines the degree of aging of the storage element 5 from the change in the slope of the waveform during charging, the charging interval, and the like. Can be estimated. Generally, when the power storage element 5 is not deteriorated, the slope of the waveform during charging is steep and the charging interval is long. On the other hand, when the power storage element 5 is deteriorated, the slope of the waveform during charging becomes gradual, and the charging interval is shortened. If it is estimated that the electricity storage element 5 has deteriorated over time, for example, an LED can be turned on to notify the user that the life of the electricity storage element 5 is near. In addition, when a permanent abnormality such as liquid leakage occurs in the electricity storage element 5, the charging voltage of the electricity storage element 5 does not rise above the second threshold value even after a certain period of time. Thus, the occurrence of an abnormality can be notified immediately. The driving power of the LED in these cases can be supplied from the non-contact power feeding device 8 instead of from the power storage element 5.

  Furthermore, when a leaflet, a circulation board, etc. are pinched | interposed into the clearance gap between the frame 1 and the movable building material 2, and this foreign material is a metal object which prevents the effect | action of a magnetic field, sufficient electric power is supplied to the receiving unit 20 from the electric power feeding unit 10. In addition, a temporary abnormality that may interfere with charging of the electricity storage element 5 may occur. If such a state continues for a long time, the electric power charged in the power storage element is eventually discharged, and the electric lock control unit 4 and the electric lock 3 cannot be driven. Moreover, since electric power cannot be supplied from the non-contact electric power feeder 8, LED cannot be blinked. In this case, it becomes impossible to input a predetermined signal from the charging control circuit 25 to the high-frequency inverter circuit 12 through the photocoupler 30 at the same time. Therefore, the photocoupler 30 is used to detect that a leaflet, a circular board, or the like is sandwiched in the gap between the frame 1 and the movable building material 2, and an alarm sound is generated while sufficient electric power remains in the power storage element 5. It is also possible to output.

1 frame (fixed structure)
2 Movable building material (door)
3 Electric lock 4 Electric lock control unit 5 Storage element 6 Solar panel (self-generating element)
8 Non-contact power supply device 9 Commercial power supply 10 Power supply unit 11 Noise filter circuit 12 High-frequency inverter circuit 13 Primary coil (of magnetic transformer) 20 Power receiving unit 21 Secondary coil (of magnetic transformer) 22 Rectification / smoothing circuit 23 Charging circuit 24 Charging Voltage detection circuit 25 Charge control circuit 30 Photocoupler

Claims (2)

A non-contact power feeding device configured by a power feeding unit provided on the fixed structure side and a power receiving unit provided on the movable building material side, and supplying power from the power feeding unit to the power receiving unit by electromagnetic induction;
An electric lock provided on the movable building material side;
An electricity storage element that is provided on the movable building material side, is charged by power output from the power receiving unit, and supplies driving power to the electric lock;
The power receiving unit includes a charging circuit for the storage element,
An authentication system using LF band radio,
With human body sensor
The power receiving unit compares a charging voltage detection circuit that detects a charging voltage of the storage element, a charging voltage of the storage element, a first threshold value of a predetermined voltage, and a second threshold value that is lower than the first threshold value. The charging of the storage element is started when the charging voltage of the storage element becomes less than the second threshold, and the charging of the storage element is started when the charging voltage of the storage element becomes equal to or higher than the first threshold. The charging control circuit further includes a charge control circuit for stopping the power supply unit so that power is supplied from the power feeding unit to the power receiving unit only when the power storage element is charged, and the power receiving unit supplies the power to the power receiving unit. Insufficient to drive the lock, but sufficient power is supplied to charge the storage element,
When the movable building material is opened, an alarm sound is output when an authentication signal is not output from the authentication system even though the human body sensor detects a person. Lock system. When the movable building material is opened, if the human body sensor detects a person and an authentication signal is output from the authentication system, a sound different from the warning sound is output. The electric lock system according to claim 1.

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