JP2009263967A - Electric lock system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To drive a motor-driven electric lock by securing only a power matching the small charge current. <P>SOLUTION: This electric lock system comprises a charge circuit 10 having a capacitor C12 for charging a power from the outside, a drive circuit 30 for driving a motor 41, and a control circuit 20 for controllably supplying the power charged in the capacitor C12 to the motor 41 through the drive circuit 30 so that the drive circuit 30 drives the motor 41 to lock and unlock the lock when the locking and unlocking operations are performed. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an electric lock system that electrically locks and unlocks an electric lock, and more particularly to an electric lock system that drives a motor-driven electric lock without securing a large-capacity power source to cope with an inrush current. It is.

Conventionally, for example, a door of a commercial building, a public facility, or a general house has been provided with an electric lock system having a high crime prevention property in order to avoid intrusion of a suspicious person. In this type of electric lock system, a dead bolt is electrically advanced and retracted by driving a driving means such as a motor or a solenoid, for example, according to a specific locking / unlocking signal (for example, Patent Document 1 below). ).
Japanese Patent Laid-Open No. 10-025935

  By the way, in the existing electric lock, as a drive system of the locking / unlocking mechanism, a motor-driven electric lock using a motor is known in addition to a solenoid electric lock using a solenoid. This motor-driven electric lock has only a dead bolt without a lever handle or knob and latch bolt, so it has excellent design, and it can be easily opened and closed using a push plate or push bar when opening and closing the door. Therefore, it is excellent in versatility.

  However, in a motor-driven electric lock, an inrush current (a large current that flows temporarily when the power is turned on), a binding current (a current that flows when the dead bolt is constrained and the load torque increases), a steady current, etc. The range of current values flowing when the motor is driven is wide, and a very large current is consumed under specific conditions.

  For this reason, the control panel for controlling the motor-driven electric lock needs to prepare a power source capable of supplying a large current in accordance with the peak power generated under specific conditions. In particular, when driving a plurality of electric locks, it is necessary to prepare a power supply with a larger capacity in proportion to the number of the electric locks.

  However, in general, the driving time of one lock is completed in 0.5 seconds to several seconds, and even though the frequency of use is high, there is an average operation stoppage time of several tens of seconds to several minutes. It was unreasonable to secure a large-capacity power supply only for short-term peak power, and there was a problem that it was not economical.

  Therefore, the present invention has been made in view of the above problems, and it is sufficient to secure only a power source corresponding to a small charging current. A motor-type electric lock can be obtained by widening the power source voltage and leveling power consumption. An object of the present invention is to provide an electric lock system that can be driven.

In order to achieve the above object, the electric lock system according to claim 1 is an electric lock system provided with a motor-driven electric lock provided on a door and locked and unlocked by the power of a motor.
A charging circuit having a charging device for charging an external power supply;
A drive circuit for driving the motor;
A control circuit that controls supply of power supplied to the charging device to the motor via the drive circuit so that the drive circuit drives the motor to lock and unlock the lock when an unlocking operation is performed. When,
Is incorporated in the motor-driven electric lock.

The electric lock system according to claim 2 is the electric lock system according to claim 1,
The charging circuit, the driving circuit, and the control circuit are configured as a single unit that is separate from the motor-driven electric lock, and are connected to the motor-driven electric lock by an adapter method.

  According to the electric lock system of the present invention, it is not necessary to secure a large-capacity power supply that can cope with the inrush current that is the maximum current in the motor-driven electric lock, and it is possible to save the trouble of routing the power supply system during installation work. it can. In addition, since it is only necessary to secure the power necessary for charging, the total power capacity can be suppressed, and charging is performed during the operation suspension time, so that the overall power consumption can be leveled. .

  Further, the charging circuit, the control circuit, and the driving circuit can be configured as a single unit separately from the electric lock, and can be directly connected to an existing type electric lock or an installed electric lock by an adapter method. Thereby, it is possible to suppress the total power capacity and level the overall power consumption even for existing types of electric locks and installed electric locks without replacing the electric lock.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an explanatory diagram showing a circuit configuration at the time of charging in the electric lock system according to the first embodiment of the present invention, and FIG. 2 is an explanatory diagram showing a circuit configuration when a locking operation is performed in the electric lock system. FIG. 3 is an explanatory view showing a circuit configuration in the electric lock system of the second embodiment according to the present invention.

<First form>
First, an electric lock system according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the electric lock system 1 of the first embodiment includes a charging circuit 10, a control circuit 20, a drive circuit 30, a locking / unlocking mechanism 40, a door opening / closing detection means 50, and a locking / unlocking detection means 60. These components are built in a motor-driven electric lock (hereinafter abbreviated as an electric lock) disposed at a predetermined location in the door or door frame.

  In the following description, control related to the locking / unlocking operation such as acquisition of locking / unlocking information and determination of the validity of the locking / unlocking information during the locking / unlocking operation is performed in the same manner as a general electric lock system. The description is omitted.

  The charging circuit 10 is provided with a wide-range step-down regulator 11 in the preceding stage in order to achieve a wide range of power supply voltage, and power supplied from the outside (all power supply systems related to electric locks, in this example, 5 to 24 VDC) The voltage is stepped down to a predetermined voltage (5 V in this example) by the step-down regulator 11, and the reduced power supply is charged to an electric double layer capacitor (hereinafter abbreviated as a capacitor) C12 as a charging device. In addition, a resistor R13 is connected between the capacitor C12 and the step-down regulator 11 in order to prevent an overcurrent from flowing through the step-down regulator 11 when the capacitor C12 is empty. Further, a backflow preventing diode 14 is connected in series between the step-down regulator 11 and the resistor R13. Further, a relay X3 that is turned on when the unlocking operation is not performed (standby) and turned off when the unlocking operation is performed is connected between the resistor R13 and the diode 14 under the control of the control circuit 30. .

  The charging device included in the charging circuit 10 is not limited to the capacitor C12, and a secondary battery can be used.

  The control circuit 20 is configured by a microcomputer including, for example, a CPU, ROM, RAM, and the like. The control circuit 20 performs ON control of the relay X3 and OFF control of a relay X1 and a relay X2 of the drive circuit 30 described later when the locking / unlocking operation is not performed (standby). The control circuit 20 controls the relay X3 to be OFF when the locking / unlocking operation is performed, and based on the door opening / closing state signal from the door opening / closing detection unit 50 and the locking / unlocking state signal from the locking / unlocking detection unit 60, X1 or relay X2 is ON controlled.

  The drive circuit 30 boosts the power supply (5V) charged in the capacitor C12 of the charging circuit 10 by the boost regulator 31 to a voltage (24V in this example) necessary for driving the motor 41 to be described later. The signal is output to the motor 41 via the relay X1 or the relay X2 whose ON / OFF switching is controlled by the control circuit 20. Note that one of the relays X1 and X2 is ON-controlled so that a current having a polarity necessary for the motor 41 flows.

  In the circuit configuration of this example, when the locking / unlocking operation is not performed by the control of the control circuit 20 (standby), both the relays X1 and X2 are OFF (see FIG. 1), and when the locking operation is performed The relay X1 is turned on to project the dead bolt 43, and when the unlocking operation is performed, the relay X2 is turned on to retract the dead bolt 43 (see FIG. 2). The circuit configuration is not limited to the illustrated one.

  The locking / unlocking mechanism 40 includes a motor 41, a transmission mechanism 42, and a dead bolt 43. When the locking / unlocking operation is performed, the control circuit 20 controls the dead bolt 43 with respect to the locking hole of the door frame. The lock is unlocked by protruding (at the time of locking) or retracting (at the time of unlocking) with the power of 41.

  The motor 41 is driven by power supply from the drive circuit 30. The transmission mechanism 42 includes a gear that transmits the power of the motor 41 to the dead bolt 43, and transmits the power generated by driving the motor 41 to the dead bolt 43. Furthermore, the dead bolt 43 is one of tightening mechanisms in the electric lock, and moves forward and backward with respect to the locking hole (strike) of the door frame by the power from the transmission mechanism 42.

  The door open / close detection means 50 detects whether the door is currently open or closed, and outputs a door open / close state signal (door open state signal, door close state signal) indicating the door open / close state to the control circuit 20. Output. The lock / unlock detection means 60 detects whether the lock is currently locked or unlocked, and outputs a lock / unlock state signal (lock state signal, unlock state signal) indicating the lock / unlock state of the lock to the control circuit 20. Is output.

  Next, the processing operation in the electric lock system 1 according to the first embodiment will be described. When the unlocking / unlocking operation is not performed (during standby), as shown in FIG. 1, the relay X3 is turned on to charge the capacitor C12 with an external power supply, and the relays X1 and X2 are not operated because the unlocking / unlocking operation is not performed. It becomes. As a result, the external power supply is stepped down to a predetermined voltage (24V → 5V in this example) by the step-down regulator 11 of the charging circuit 10, and the stepped-down voltage is charged into the capacitor C12.

  On the other hand, when a locking operation (or unlocking operation) is performed, the control circuit 20 turns off the relay X3 to prevent overload on the step-down regulator 11 of the charging circuit 10, as shown in FIG. When a locking operation (or unlocking operation) is performed in this state, the relay X1 or the relay X2 is turned on (in the example of FIG. 2, the relay X1 is turned on for the locking operation). As a result, the power charged in the capacitor C12 is boosted to a predetermined voltage (in this example, 5V → 24V) by the boost regulator 31 of the drive circuit 30, and the power is supplied to the drive circuit 30. Then, the motor 41 is driven by the drive circuit 30 supplied with power, and the dead bolt 43 is advanced and retracted by the power of the motor 41.

<Second form>
Next, the electric lock system of the 2nd form which concerns on this invention is demonstrated, referring FIG. In addition, in the electric lock system of the 2nd form demonstrated below, about the same component as the electric lock system of the 1st form mentioned above, the same number is attached | subjected and the description is abbreviate | omitted, About only the different component requirements explain.

  In the electric lock system 1 of the second form, as shown in FIG. 3, the charging circuit 10, the control circuit 20, and the drive circuit 30 in the electric lock system 1 of the first form are formed as one unit separate from the electric lock. By constructing (dotted line in FIG. 3) and connecting directly to an existing type motor-driven electric lock or an installed motor-driven electric lock by an adapter method, wasteful power consumption can be achieved as in the first embodiment. The conventional locking and unlocking operation can be realized while suppressing.

  As shown in FIG. 3, in the electric lock system 1 of the second embodiment, when connecting to an existing electric lock, the control circuit 20 is connected to the door opening / closing detection means 50 and the lock / unlock detection means 60 of the electric lock. At the same time, the drive circuit 30 is connected to an electric lock motor 41.

  In the electric lock system 1 of the second form, as in the first form, when the locking / unlocking operation is not performed (standby), the external power supply is stepped down to a predetermined voltage by the step-down regulator 11 of the charging circuit 10 ( 24V → 5V), the capacitor C12 is charged, and when the locking / unlocking operation is performed, the power source charged in the capacitor C12 is boosted to a predetermined voltage (5V → 24V) by the boost regulator 31 of the drive circuit 30, and the drive circuit Power is supplied to the motor 41 via 30.

  In addition, since the processing operation in the electric lock system 1 of the 2nd form is the same as the processing operation in the electric lock system 1 of the 1st form, the description is abbreviate | omitted. In the above description, as shown in FIG. 3, the configuration has been described in which the adapter is directly connected to the electric lock. However, the adapter may be connected in the form of a current-carrying metal fitting.

  Thus, in the electric lock system of the first embodiment described above, when the locking / unlocking operation is not performed (during standby), the capacitor C12 is always charged from the outside with a small current, and when the locking / unlocking operation is performed, the capacitor C12 The power supply is supplied to the motor 41 via the drive circuit 30 and the unlocking operation is performed.

  As a result, it is not necessary to secure a large-capacity power supply that can cope with the inrush current that is the maximum current in the motor-driven electric lock, and it is possible to save the trouble of routing the power supply system during installation work. Further, since only a power source corresponding to a small charging current needs to be secured, the total power capacity can be suppressed. In addition, basically, the operation stop time occupies most of the time, and charging is performed during that time, so that the overall power consumption can be leveled.

  Furthermore, even when driving a plurality of electric locks, the total required power capacity is small, and it is not necessary to secure a larger capacity power supply in proportion to the number of electric locks as in the prior art. In addition, if an electric double layer capacitor is used as a charging device, it is possible to use it stably for a long period of time, with almost no management of operating temperature and life.

  In the electric lock system of the second embodiment, the charging circuit 10, the control circuit 20, and the drive circuit 30 are configured as one unit that is separate from the electric lock, and an existing type electric lock or installed electric power is provided by an adapter method. Can be connected directly to the lock. As a result, the total power capacity can be suppressed for existing types of electric locks and installed electric locks without replacing the electric lock, and charging is performed during the operation downtime. Power consumption can be leveled.

  By the way, in each form mentioned above, it was set as the structure which turns on / off each circuit by switching relay X1-X3 at the time of locking / unlocking operation, when locking / unlocking operation is not performed on account of description. It is not limited to the configuration of In practice, it is common to use a circuit using a semiconductor element such as a transistor or FET instead of the relay circuit described above.

  As mentioned above, although the best form in this invention was demonstrated, this invention is not limited with the description and drawing by this form. That is, it is a matter of course that all other forms, examples, operation techniques, and the like made by those skilled in the art based on this form are included in the scope of the present invention.

It is explanatory drawing which shows the circuit structure at the time of charge in the electric lock system of the 1st form which concerns on this invention. It is explanatory drawing which shows the circuit structure at the time of locking operation in the same electric lock system. It is explanatory drawing which shows the circuit structure in the electric lock system of the 2nd form which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric lock system 10 Charging circuit 11 Buck regulator 12 Capacitor 13 Resistance 14 Diode 20 Control circuit 30 Drive circuit 31 Boost regulator 40 Unlocking mechanism 41 Motor 42 Transmission mechanism 43 Dead bolt 50 Door opening / closing detection means 60 Locking / unlocking detection means

Claims (2)

In an electric lock system provided with a motor-driven electric lock provided on a door and locked and unlocked by the power of a motor,
A charging circuit having a charging device for charging an external power supply;
A drive circuit for driving the motor;
A control circuit that controls supply of power supplied to the charging device to the motor via the drive circuit so that the drive circuit drives the motor to lock and unlock the lock when an unlocking operation is performed. When,
Is incorporated in the motor-driven electric lock. The charging circuit, the driving circuit, and the control circuit are configured as a single unit that is separate from the motor-driven electric lock, and are connected to the motor-driven electric lock by an adapter method. The electric lock system according to 1.

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