JPS624142Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an improvement to an electronic locking device that locks or unlocks an object to be locked by inputting a secret code consisting of, for example, multiple digits or symbols from an external key.

[Conventional technology]

Compared to mechanical locks, which are locked and unlocked by inserting a key into a lock on the door of a house, etc., electronic locking devices eliminate the hassle of having to carry the key all the time, and also make it easier to keep the key. There is no need to worry about the door becoming impossible to open due to the powder being lost, or theft due to a duplicate key being duplicated, so it is widely used not only in houses but also in safes, car doors, travel bags, etc. Most of these electronic locking devices have a key button operation section that inputs a recited code from the outside, stores the entered recited code, and compares and calculates the input code for locking/unlocking with the stored recited code. , a control unit that outputs the calculation results, an electric drive unit operation unit that locks and unlocks a locked object based on the output from the control unit, and a power source for the control unit and a power source for the electric drive body. It is prepared. These devices have been devised in various ways to more completely maintain the confidentiality of the recitation code, such as those that allow a specific person to update the recitation code at any time, and those that allow the recitation code to be updated at a constant rate. There are some restrictions on time. Most of the electronic locking devices devised in this way do not have the drawbacks of the mechanical locks mentioned above, and can maintain a higher level of security than combination locks.

[Problem that the invention attempts to solve]

These conventional electronic locking devices differ from mechanical locks and combination locks in that they are mainly composed of electronic circuits, so they are used as a power source for each circuit and as a regular power source for the solenoid or motor that is the electric drive body for lock operation. There may be a voltage drop in the built-in battery, a failure in the rectifier that converts commercial power to equipment power, or a power outage or power outage in the power supply system, which may cause wear and tear in the power supply system. If such a failure occurs in the power supply system while the door is locked, the electric drive body will no longer operate, resulting in a problem that the door or bag cannot be unlocked.

This idea was made in view of the current situation described above, and it solves the drawback that conventional electronic locking devices cannot be unlocked in abnormal situations such as a voltage drop or failure in the power supply system. To provide an electronic locking device which can be unlocked with a simple operation using a power source and a magnetic material such as a magnet or an iron piece, and which can be used with peace of mind due to the high confidentiality of the operating method.

[Means for solving problems]

The electronic locking device according to the present invention inputs a recited code from the outside and stores it.
An electronic device that compares and calculates a memorized recited code and an external key input code, and when the recited code and the input code match, drives an electric drive body to place the locked object in a locked state or in an unlockable state. In the locking device,
A circuit that determines whether the voltage of the regular power source of the electric drive body is equal to or higher than a specified value and emits a signal, a terminal that connects an external power source that drives the electric drive body, and a nearby circuit that opens and closes depending on changes in the external magnetic field. The switches are connected in series, and when the voltage of the common power source is below a specified value, the electric drive body is directly driven by an external power source regardless of the control section, and the switch is connected in series with a circuit that directly drives the electric drive body by an external power source regardless of the control section, and a circuit that connects the switches in series and drives the electric drive body directly by an external power source regardless of the control section, The above-mentioned problem is solved by providing a circuit for selectively switching one of them.

[Effect]

The electronic locking device according to this invention is constructed as described above and operates as follows.

The voltage is constantly applied to the voltage value determination circuit from the regular power source of the electric drive body, and if the voltage value is equal to or higher than a specified value for normal operation of the electric drive body, it outputs a normal voltage signal as the specified value. If it is less than , the voltage value determination circuit outputs a voltage abnormality signal to the power supply switching circuit. In the former case, that is, in a normal voltage state, the common power supply is connected to the electric drive body through the operating end drive circuit to operate it, and the locked object can be locked and unlocked; In other words, in a voltage abnormality state, an external power source, such as a car battery, is selectively connected to the electric drive body via the operating end drive circuit, and a mercury battery, for example, used as a regular power source, is switched. Even in the case of a worn-out abnormality, the electric drive body can be activated to make the locked object, for example, unlockable. Moreover, the connection to the external power source is made through a circuit in which proximity switches are connected in series that open and close depending on changes in the external magnetic field, and there are two problems: a magnet or iron piece is required for the mounting position of the switch and for its connection operation. Since it is not known to anyone other than the user, the unlocking operation is sufficiently kept confidential from third parties.

〔Example〕

FIG. 1 is a perspective view of the exterior of a large bag (trunk) for traveling abroad, equipped with the electronic locking device of this invention. Reference numeral 1 denotes a case made of, for example, duralumin board material, and an electronic locking device board 2 is attached to the case near the handle. Reference numeral 3 denotes a key button operation panel provided in a recessed part several mm below the panel surface of the board 2, and has four function keys of ten number keys 0 to 9. 4 is the operation panel cover, which should be closed except when locking/unlocking the bag. The bases 5A and 5B of the case 1 have an electric drive body shown by a dotted line at the bottom thereof, such as an electromagnetic solenoid 6.
In addition to its original function of locking or unlocking the lock by operating A and 6B, it also functions as an external connection terminal for unlocking in the event of a power system failure, which is one of the key parts of this invention. are doing. External power source, for example DC12 from a car battery
V is pulled out using a lead wire, and its tip is inserted into the external power supply connection terminals 7 and 8 formed by the small holes of the caps 5A and 5B as + and - sides.

The dotted line on the lower left side of the case 1 is a proximity switch 9 that conducts by applying a magnetic change from the outside, which is one of the main parts of this device apart from the above.
So, for example, when a permanent magnet is brought close, the circuit is turned on.
Reed switches that turn on the circuit when a ferromagnetic material such as a piece of iron approaches, or magnetic proximity switches that turn on the circuit when a ferromagnetic material such as a piece of iron approaches are used. The reed switch described above is called a two-pole type reed switch, and consists of a pair of glass tubes with an outer diameter of 3 to 5 mm and a length of about 20 mm that are filled with vacuum or inert gas and whose tip surfaces are coated with a contact member. Reed pieces made of ferromagnetic material are opposed to each other with a gap between them, and are attracted and closed by an external magnetic field.
A magnetic proximity switch has a permanent magnet attached to an internal lead piece, and as described above, similarly attracts and closes the circuit when it comes close to a ferromagnetic material such as an iron piece.
Compared to push-button switches or switches that use heat or light, these magnetic switches are easier to attach, and their attachment position cannot be seen from the outside, ensuring confidentiality of unlocking operations. This is due to the high Any of the above-mentioned proximity switches 9 is connected in series to the external power terminals 7, 8 formed by the above-mentioned small holes of the bases 5A, 5B through two-pole terminals 9A, 9B. With this configuration, even if the caps 5A and 5B are used as external power terminals,
Even if a third party knows, this electronic locking device cannot be used unless two pieces of information are known: that a magnet or piece of iron is required, and where the magnet or piece of iron should be placed close to the bag. cannot be unlocked. If the proximity switch 9 is a reed switch,
The permanent magnet that activates this can be easily obtained at electronics stores, etc., without having to carry it with you all the time. 1st
Although not shown in the figure, a control section of a microcomputer that processes key inputs is provided on the back side of the key button operation panel 3, and its power source is, for example, DC.
A 6V mercury battery is also replaceably installed in the same location. FIG. 2 is a block diagram showing the circuit configuration of the electronic locking device of this invention. Of the 14 key buttons on the operation panel 3, S is the power switch, which is turned on when the built-in common power supply 11 is normal and the lock is locked or unlocked, and key C is the clear key, which switches from 0 to
If you mistakenly set the number key 10 for 9 as a recited number and erase it from memory, the key L is a lock key, and if you press key L after setting the recited number (3629), solenoids 6A and 6B will operate. It will be locked. After locking, turn on the power with power switch S.
Turn off. Key U is a non-locking key, and when opening the bag, turn on the power with power switch S, set the above memorized value with number key 10, and press key U to activate solenoids 6A and 6B in the unlocked state. It is. 12 is a sequencer consisting of a microcomputer control unit (microprocessor), flip-flop, gate circuit, etc., which stores the recited numerical values input from the key button operation panel 3 in the memory, and controls whether to lock or non-lock. It has a function of comparing and calculating whether or not the value matches the value set on the key button operation panel 3 at the time, and outputs a lock signal Sl or a non-lock signal Su to the operation end drive circuit 13 only when they match. There is. A display 14 surrounded by a dotted line is not provided in the bag shown in FIG. 1, but in the case of a safe, etc., it is provided close to the key button operation panel 3, and the display 14 can be used to check the set recited numerical value using, for example, a liquid crystal display. Display for. 15, which is also indicated by a dotted line, is not necessary for bags, but is a commercial power source used for house doors, etc. When using a commercial power source, a rectifier and constant voltage device is installed in place of the regular power source 11. . This built-in common power supply 11 also serves as a current for the control section 12 of the microcomputer.

The main part of this invention is the part 21 surrounded by a dotted line frame in FIG. The external power source 22 is easily available, for example, a car battery (12V DC), and is connected to external power terminals 7 and 8 and lead wires 23 and 24.
connected via. For example, a reed switch is used as the proximity switch 9, and is provided in contact with the inner wall of the case 1 of the bag, and can be turned on by bringing a ferrite magnet 25 close to the case 1 from the outside in the direction of arrow a. can. If a magnetic proximity switch is used as the proximity switch 9, an iron piece may be used instead of the ferrite magnet 25.

The location of the proximity switch 9 on the bag is information known only to a specific person, such as the user of the bag. cipher).

The voltage value judgment circuit 26 has a built-in common power supply 1.
Voltage 1 is always applied, and the voltage value is such that, for example, solenoids 6A and 6B operate normally.
If the voltage is between 5V and 6V DC, a signal Sn indicating that the voltage is normal is output to the power supply switching circuit 27, and a signal Sa indicating that the voltage is abnormal is output to the power supply switching circuit 27 when the voltage value is less than 5V.

When the input signal is Sn, the power supply switching circuit 27 operates such that no matter what voltage is applied to the input terminals 28 and 29 via the external terminals 7 and 8,
It is configured not to output to the output terminals 30 and 31. Now, when the built-in power supply 11 consisting of a mercury battery has reached the end of its life and the device does not operate even when you try to open your bag, connect the external power supply 22 to the + and - external power terminals 7 and 8 on the base of the bag without making a mistake in polarity. and then by applying a magnet 25 or piece of iron (not shown) to the particular location where the proximity switch 9 is located as shown in FIG. 9A,
9B is turned on, and DC 12V is applied to the power supply switching circuit 27. At this time, as described above, since the signal inputted from the voltage value judgment circuit 26 to the power supply switching circuit 27 is Sa, the power supply switching circuit 27
12V is output as it is, and the solenoids 6A and 6B are operated via the operating end drive circuit 13 to enable unlocking. Thereafter, the bag can be opened by operating the manual locking devices of the caps 5A and 5B. The above is an explanation of the structure and operation of the unlocking mechanism of this invention that allows only a specific person to open the bag in the event of an abnormality in the power supply system.

Next, a specific example circuit of the voltage value determination circuit 26 and power supply switching circuit 27 shown in FIG. 2 will be explained with reference to FIG. In this figure, 6, 7, 8, 9, and 11 all correspond to the constituent members with the same symbols in FIG. 2, and their explanations will be omitted. 51 and 52 are common power supply 1
1, (DC6V) +, - terminals, 53, 54, 55
All of them are NPN transistors with emitters grounded, and the transistor 55 in particular has a large power supply amplification factor β. 56 is a Zener diode with a breakdown voltage of 3V, and 57 and 58 are diodes. Note that the capacitor 60 and the resistor 61 are elements for determining the specific number. In this configuration, during normal operation when the above-mentioned output signals Sl and Su from the control section 12 of the microcomputer are input to the base of the transistor 53 as the operating end drive circuit 13, and the voltage of the built-in common power supply 11 is higher than the specified value of 5 VDC. In this case, the Zener diode 56 is ON, the transistor 54 is conductive, and its emitter current _I1 flows greatly, so that an external voltage (DC 12V) is applied to the external power supply terminals 7 and 8.
Even if proximity switch 9 is turned on, transistor 55
No base current flows through the base 55B of the transistor 55, the transistor 55 is turned off, and no current _I2 flows. Due to this action, the solenoids 6A and 6B are driven only by the lock signal Sl and the unlock signal Su from the control section 12 of the microcomputer. This is normal operation, but when the voltage of the built-in common power supply 11 decreases and becomes less than the specified value of 5V, the signal from the microcomputer control unit 12 disappears and the transistor 53 turns OFF, but at the same time the Zener diode 56 and transistor 54 as well.
It becomes OFF, and the current _I1 becomes zero. Therefore, a base current is generated at the base 55B of the transistor 55, and the transistor 55 becomes conductive. As described above, since the current amplification factor β of this transistor 55 is large, a large current I ₂ flows through the solenoids 6A and 6B. However, the voltage applied to the solenoids 6A and 6B is reduced by the voltage of the external power supply 22 (DC 12V) by the diode 57 and the resistor 59, and becomes 5 to 6V, which is the operating voltage of the solenoids 6A and 6B, and the unlocking operation is activated. do.

The electronic locking device according to this invention has been explained above using the case where it is attached to a large travel bag as an example, but when the electronic locking device is used for the door of a house or a safe, it is necessary to press the key button. A lamp or a buzzer may be provided near the operation panel 3.

〔effect〕

This idea is structured as above, so
If a conventional electronic locking device becomes unable to unlock due to consumption or failure of its regular power supply system, the user will be unable to control the lock, whereas the electronic locking device of this invention uses an external power source that is easy to use. By connecting with a cryptographic operation using a magnet or iron piece, the lock can be unlocked easily and quickly, and the security of the unlocking operation in the event of an abnormality can be sufficiently maintained.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a large travel bag equipped with an electronic locking device which is an embodiment of this invention, and Fig. 2 is a block diagram showing the configuration of this embodiment device.
FIG. 3 is a circuit diagram of an embodiment of a voltage value determination circuit and a power supply switching circuit, which are the main parts of this invention. 3...Key button operation panel, 5A, 5B...Bag base, 6A, 6B...Electric drive body, (solenoid), 9...Proximity switch, 11...Built-in common power supply, 22...External power supply, 26 ... Voltage value judgment circuit, 27 ... Power supply switching circuit.

Claims (1)

[Scope of utility model registration request] A recited code is keyed in from the outside and stored, and the memorized recited code is compared with the input code for locking/unlocking, and when the recited code and the input code match, the electric drive unit is driven. In an electronic locking device, the electronic locking device is equipped with a control unit that puts a locked object into a locked state or an unlockable state. , a terminal for connecting an external power source that drives the electric drive body and a proximity switch that opens and closes depending on changes in the external magnetic field are connected in series, and when the voltage of the common power source is below a specified value, the electric drive body is connected to the control unit. 1. An electronic locking device comprising: a circuit that is directly driven by an external power source regardless of the power source; and a circuit that selectively switches between the common power source and the external power source based on the discrimination signal.