JPS624141Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention enables a locked object to be locked or unlocked by inputting a memorized code consisting of, for example, multi-digit numbers and symbols from the outside. The present invention relates to an electronic locking device, and particularly to an improved driving power source.

[Conventional technology]

Compared to mechanical locks, which lock and unlock by inserting a key into a lock on the door of a house, for example, and turning it, electronic locking devices eliminate the hassle of carrying a key all the time, and there is no risk of losing the key. Since there is no need to worry about the door becoming impossible to open or theft due to a duplicate key, it is widely used not only in houses but also in safes, car doors, travel bags, etc.

Various types of these electronic locking devices have been provided in the past, and are described in, for example, Japanese Patent Publication No. 54-10098, Japanese Patent Publication No. 54-10099, Japanese Patent Publication No. 54-22300, Japanese Patent Publication No. 54-26199, etc. There are things that have been done.

[Problem that the invention attempts to solve]

All of these conventional electronic locking devices input a recited code from the outside, store it, and compare the stored recited code with the input code for locking/unlocking. When they match, an electric drive body (for example, a motor or an electromagnetic solenoid) is driven to place the locked object in a locked state or in an unlockable state.

Each of these electronic locking devices is unique in its efforts to maintain the confidentiality of the code; for example, some allow only specific people to update the code at any time, while others restrict the code to be updated within a certain period of time. There is something. In this way, electronic locking devices are superior to combination locks in terms of confidentiality, but they are mainly composed of electronic circuits.
If the built-in battery that serves as the power source for each of these circuits, the electromagnetic solenoid that is the operating part of the lock, or the power source for electric drives such as motors, or if an external commercial power source is used, replace the battery. If a failure of the rectifier or a power outage of the commercial power supply occurs while the lock is locked, the electromagnetic solenoids, motors, and other electric drives will not operate, making it impossible to open doors, bags, etc.

This invention solves the drawback of conventional electronic locking devices that they cannot be unlocked in the event of an abnormality such as voltage drop or failure in the power supply system, and uses an easily available external power source such as a car battery. To provide an electronic locking device which can be unlocked with a simple operation and which can maintain high confidentiality of the operation method.

[Means for solving problems]

In this invention, as a technical means for solving the above-mentioned problems, an electronic locking device is configured as follows. In other words, a recited code from the outside is inputted using a key, and this is memorized. When the memorized recited code matches the input code from the outside, the electric drive body is driven to lock the object to be locked. An electronic locking device having a control unit for setting a state or an unlockable state, the electronic locking device having 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 issues a signal, and a terminal for connecting an external power source. and a circuit that directly drives the electric drive body with an external power source regardless of the control unit when the voltage of the regular power supply is below a specified value, and a circuit that selectively selects either the regular power supply or the external power supply according to the discrimination signal. The circuit is configured by providing a circuit for switching to.

[Effect]

The electronic locking device according to this invention is constructed as described above and operates as follows.
The voltage from the regular power source of the electric drive body is always applied to the voltage value judgment circuit, and if the voltage value is equal to or higher than the specified value for normal operation of the electric drive body, a normal voltage signal is output. If it is below, the voltage value determination circuit outputs a voltage abnormality signal to each 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 an abnormal voltage state, an external power source, such as a car battery, switches
By being connected to the electric drive body through the operating end drive circuit, the electric drive body can be operated even in the event of an abnormality, such as when the mercury battery used as a regular power source is exhausted, and the locked object can be unlocked. It can be made lockable.

Moreover, since the connection to the external power source is made through two arbitrarily selected cores in a receptacle consisting of a multi-core connector, the confidentiality of the connection is sufficiently maintained from third parties. .

〔Example〕

Hereinafter, an embodiment of the device according to the invention will be described with reference to the drawings.

Figure 1 shows a large bag (trunk), for example, for traveling abroad, to which this embodiment device is attached.The case 1 is made of, for example, duralumin board, and the main part 2 of the electronic locking device is attached near the handle. It is being Key button operation panel 3 is numbered from the panel surface.
It is installed in a recess sunk about 0 to 9 mm.
There are 10 numeric keys and 4 function keys. The operation panel cover 3C is closed except when the bag is locked or unlocked. Case 1
A receptacle 5 consisting of a multi-core, for example, 10-core connector, which serves as an external power connection terminal for unlocking in the event of an abnormality, is provided adjacent to the opening/closing cap 4B, and a cover (not shown) that can be attached or removed at any time is provided. is closed. Electromagnetic solenoids 6 are installed inside the case 1 below the opening/closing caps 4A and 4B, respectively. These electromagnetic solenoids 6 are activated when a key is input correctly from the key button operation panel 3, and lock or unlock the caps 4A and 4B.

The control section of the microcomputer performs arithmetic processing by key input on the key button operation panel 3.
Although not shown in FIG. 1, it is provided close to the bottom surface of the key button operation panel 3, and its power supply
For example, a 6V DC mercury battery is also installed in the same location so that it can be replaced.

FIG. 2 is a block diagram showing the circuit configuration of this embodiment device. 3 is the key button operation panel mentioned above;
5 is a receptacle consisting of a 10-core connector which also serves as an external power supply connection terminal, and 6 is an electromagnetic solenoid (a small motor may also be used) which is also an electric drive body.

Of the 14 key buttons on the key button operation panel 3, S is the power switch, which is turned on when locking or unlocking when the built-in power supply 11 is normal, and C is the power switch.
is the clear key, which erases the 10 number keys from 0 to 9 from the memory when it is mistakenly set as a recited number. L is the lock key, which is used to press the number key to set the recited number, such as "5218". After setting correctly in step 10, when this lock key L is pressed, the electromagnetic solenoid 6 is activated and the lock is established. At this time, the power switch S is also used to turn off the power after the door is locked. U is the unlock key. When opening the bag, turn on the power with the key S, set the recited value mentioned above with the numeric key 10, and then press the unlock key U. The electromagnetic solenoid 6 will operate and the bag will be unlocked. be done.

Reference numeral 12 denotes a sequencer composed of a microcomputer control unit, flip-flop, gate circuit, etc., which stores specific recited numerical values from the key button operation panel 3 in its memory, and presses the key button when locking/unlocking. A comparison calculation is made to see if the value matches the numerical value set on the operating panel 3, and only when they match, a lock signal Sl and a non-lock signal Su are output to the operating end drive circuit 13.

The display 14 surrounded by a dotted line is not provided in the embodiment shown in FIG. 1, but in an electronic locking device such as a safe, it is provided near the key button operation panel 3, and the display 14 is indicated by, for example, liquid crystal characters. display the numerical value,
Allows the operator to complete locking/unlocking. A power supply 15, also surrounded by a dotted line, is an external commercial power supply, and is used in an electronic locking device for a house door, but is not used in the embodiment shown in FIG. Built-in regular power supply 1
For example, a DC6V mercury battery is used for the control unit 1, which also serves as a power source for the control unit 12.

Note that when the commercial power source 15 described above is used, a rectifier and a constant voltage device are provided in place of the built-in common power source 11.

The structure described above is equivalent to a conventional electronic locking device and is well known, and the main part of this invention is in the portion 21 surrounded by a dotted line in FIG.

The receptacle 5, which is the fixed side of the 10-core connector described above, has socket connectors _P1 to _P10 . The voltage value determination circuit 22 is constantly applied with voltage from the built-in common power supply 11, and the voltage value causes the electromagnetic solenoid 6 to operate normally, for example.
If it is 5V DC or more, it outputs a signal Sn indicating normal voltage to the power supply switching circuit 23, and if it is below 5V DC (including zero V), it outputs a signal Sa indicating abnormal voltage to the power supply switching circuit 23. It is. When the input signal is Sn, that is, when the voltage of the common power supply 11 is maintained above the specified value, the power supply switching circuit 23 determines what value of voltage is applied to the input terminals 24 and 25 of the power supply switching circuit 23 at the receptacle. Even if the power is applied through the external power connection terminal 5, the output terminal 2 of the power supply switching circuit 23
6 and 27 are configured not to be output.

For example, a mercury battery is used as the regular power source 11, and when its lifespan reaches the end, the device no longer operates properly.
For example, if the bag shown in FIG.
using a car battery.

Connect cap 4A in Figure 1 to + as an external power supply terminal.
It is also possible to connect the base 4B directly with the lead wires 29 and 30 with the base 4B negative, but it is also possible to connect it directly to the input terminals 24 and 25 of the power supply switching circuit 23 by connecting it to the external power supply 28.
When 12V DC is applied, the input signal from the voltage value judgment circuit 22 is Sa in this case, so the power supply switching circuit 23 outputs the above-mentioned 12V DC from the output terminals 26 and 27 via the operating end drive circuit 13. Then, the electromagnetic solenoid 6 is activated to enable unlocking. Therefore, after that, caps 4A and 4B
You can open the bag by releasing the manual lock device.

By the way, the connection means that uses the caps 4A and 4B directly as external power supply connection terminals is simple and inexpensive, but there is a problem in maintaining confidentiality as a means for unlocking in an abnormal situation. Such means are
If this type of bag becomes widespread, it will become obvious that there is a risk that it will be used by a third party. Therefore, in this embodiment device, confidentiality is maintained by using the receptacle 5 which is a multi-core connector. As shown in Figure 2, connect the receptacle 5 to a 10-pin socket connector or pin _P1.
〜P ₁₀ , and connect P ₇ arbitrarily selected from among them, for example, to the + terminal and P ₁₀ to the - terminal, and use this as part of the recitation code +=P ₇ , -=P ₁₀ . For example, only the bag owner is notified. By doing this, a third person who is not allowed to open the bag may try to unlock the bag in an abnormal situation and insert the + and - terminals of DC 12V into the 10-core connector of the receptacle 5 from one end. Even so, the probability of matching the above recited code is 1/
{(n-1)+(n-2)+...+1}×2=1/90
<Here n is the number of pins in the connector, in this example 10>
Therefore, it can be seen that a third party who does not know the recited code cannot easily open the door.

Next, one specific embodiment of the voltage value determination circuit 22 and power supply switching circuit 23 shown in FIG. 2 will be described based on FIG. 3. 6, 11, 12 in Figure 3,
28, 31, 32, 51, and 52 are the same as those with the same reference numerals in FIG. 2, so a description thereof will be omitted.

53, 54, and 55 are all emitter grounding surfaces.
Among the NPN transistors used, 55 in particular has a large current amplification factor β. 56 is a Zener diode with a breakdown voltage of 3V, 57 and 58 are diodes, and 60 and 61 are resistors and capacitors for determining time constants.

In this configuration, the above-mentioned output signal from the control section 12 of the microcomputer, that is, the lock signal
Sl and non-lock signal Su are applied to the base of the transistor 53 as the operating end drive circuit 13, and in normal conditions when the voltage of the built-in common power supply 11 is higher than the specified value of DC5V, the constant voltage function of the Zener diode 56 As a result, the transistor 54 becomes conductive, and its emitter current I ₁ flows, and the DC 12
Even if V is applied, the base 5 of transistor 55
No base current flows through transistor 5B, and transistor 55
is turned off, and I ₂ =0. Due to this action, the electromagnetic solenoid 6 is driven only by the signals from the control section 12 of the microcomputer, that is, the lock signal Sl and the unlock signal Su.

The voltage of the regular power supply 11 drops and the specified value DC5
When the voltage becomes less than V, no signal is output from the control section 12 of the microcomputer, and the transistor 53 becomes
At the same time, the Zener diode 56 also turns OFF, and the output current I ₁ from the transistor 54 becomes 0.

Next, connect the terminals 31 and 32 with DC from the external power supply 28.
Apply a voltage of 12V. This voltage becomes a DC6V unlocking voltage through the diode 57 and resistor 59, and the Zener diode 56 turns on again, but
The base 54B voltage of the transistor 54 is applied with a delay of a time TL determined by a resistor 60 and a capacitor 61, which are time constant elements, for example, 0.3 seconds. On the other hand, the base 55B of the transistor 55 has the aforementioned
Since the base current flows simultaneously with the application of DC12V, the transistor 55 turns ON (output current I ₂ ), and the unlocking voltage of DC6V is applied to the electromagnetic solenoid 6.
is applied to unlock the door in the event of an abnormality, and turns OFF after the aforementioned 0.3 second delay.

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. However, when this electronic locking device is used for the door of a house or a safe, etc., it is necessary to operate the key button operation. A lamp or a buzzer may be provided near the panel 3.

〔effect〕

This idea is structured as above, so
If a conventional electronic locking device becomes impossible to unlock due to consumption or failure of its power supply system, the user will be unable to control the lock, but with the electronic locking device of this invention, it is easy to remove the battery from a car. The lock can be unlocked by a simple operation of connecting an external power source according to the recited code, and security can be sufficiently maintained during this abnormal unlocking operation.

[Brief explanation of drawings]

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, a power supply value determination circuit, and a power supply switching circuit, which are the main parts of this invention. 3... Key button operation panel, 4A, 4B... Bag base, 5... Receptacle, 6... Electric drive body (electromagnetic solenoid), 11... Regular power supply, 22
... Voltage value judgment circuit, 23 ... Power supply switching circuit, 2
8...External power supply.

Claims (1)

[Claims for Utility Model Registration] (1) Key-input a code to be recited from the outside, memorize it, compare the memorized code with the input code for locking/unlocking, and input the code to be recited. In an electronic locking device having a control unit that drives an electric drive body to make the locked object locked or unlockable when the codes match, the voltage of the regular power source of the electric drive body is equal to or higher than a specified value. A circuit that has a circuit that determines whether or not it is and issues a signal, and a terminal that connects an external power source, and that drives the electric drive body directly from the external power source regardless of the control unit when the voltage of the common power source is below a specified value. and a circuit for selectively switching either a regular power supply or an external power supply according to the discrimination signal. (2) Scope of Utility Model Registration Claim 1, in which the terminal for connecting an external power supply for driving an electric drive body from the outside consists of two arbitrarily selected pins or sockets of a receptacle made of a multi-core connector. Electronic locking device as described.